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OPCLEAVER_BackDoorLogger

YARA-2014-0060 High general Active

Keylogger used by attackers in Operation Cleaver

OPCLEAVER_BackDoorLogger.yar Valid Syntax 
/* Op Cleaver -------------------------------------------------------------- */

rule OPCLEAVER_BackDoorLogger
{
	meta:
		description = "Keylogger used by attackers in Operation Cleaver"
		reference = "http://cylance.com/assets/Cleaver/Cylance_Operation_Cleaver_Report.pdf"
		date = "2014/12/02"
		author = "Cylance Inc."
		score = 70
	strings:
		$s1 = "BackDoorLogger"
		$s2 = "zhuAddress"
	condition:
		all of them
}

rule OPCLEAVER_Jasus
{
	meta:
		description = "ARP cache poisoner used by attackers in Operation Cleaver"
		reference = "http://cylance.com/assets/Cleaver/Cylance_Operation_Cleaver_Report.pdf"
		date = "2014/12/02"
		author = "Cylance Inc."
		score = 70
	strings:
		$s1 = "pcap_dump_open"
		$s2 = "Resolving IPs to poison..."
		$s3 = "WARNNING: Gateway IP can not be found"
	condition:
		all of them
}

rule OPCLEAVER_LoggerModule
{
	meta:
		description = "Keylogger used by attackers in Operation Cleaver"
		reference = "http://cylance.com/assets/Cleaver/Cylance_Operation_Cleaver_Report.pdf"
		date = "2014/12/02"
		author = "Cylance Inc."
		score = 70
	strings:
		$s1 = "%s-%02d%02d%02d%02d%02d.r"
		$s2 = "C:\\Users\\%s\\AppData\\Cookies\\"
	condition:
		all of them
}

rule OPCLEAVER_NetC
{
	meta:
		description = "Net Crawler used by attackers in Operation Cleaver"
		reference = "http://cylance.com/assets/Cleaver/Cylance_Operation_Cleaver_Report.pdf"
		date = "2014/12/02"
		author = "Cylance Inc."
		score = 70
	strings:
		$s1 = "NetC.exe" wide
		$s2 = "Net Service"
	condition:
		all of them
}

rule OPCLEAVER_ShellCreator2
{
	meta:
		description = "Shell Creator used by attackers in Operation Cleaver to create ASPX web shells"
		reference = "http://cylance.com/assets/Cleaver/Cylance_Operation_Cleaver_Report.pdf"
		date = "2014/12/02"
		author = "Cylance Inc."
		score = 70
	strings:
		$s1 = "ShellCreator2.Properties"
		$s2 = "set_IV"
	condition:
		all of them
}

rule OPCLEAVER_SmartCopy2
{
	meta:
		description = "Malware or hack tool used by attackers in Operation Cleaver"
		reference = "http://cylance.com/assets/Cleaver/Cylance_Operation_Cleaver_Report.pdf"
		date = "2014/12/02"
		author = "Cylance Inc."
		score = 70
	strings:
		$s1 = "SmartCopy2.Properties"
		$s2 = "ZhuFrameWork"
	condition:
		all of them
}

rule OPCLEAVER_SynFlooder
{
	meta:
		description = "Malware or hack tool used by attackers in Operation Cleaver"
		reference = "http://cylance.com/assets/Cleaver/Cylance_Operation_Cleaver_Report.pdf"
		date = "2014/12/02"
		author = "Cylance Inc."
		score = 70
	strings:
		$s1 = "Unable to resolve [ %s ]. ErrorCode %d"
		$s2 = "your target’s IP is : %s"
		$s3 = "Raw TCP Socket Created successfully."
	condition:
		all of them
}

rule OPCLEAVER_TinyZBot
{
	meta:
		description = "Tiny Bot used by attackers in Operation Cleaver"
		reference = "http://cylance.com/assets/Cleaver/Cylance_Operation_Cleaver_Report.pdf"
		date = "2014/12/02"
		author = "Cylance Inc."
		score = 70
	strings:
		$s1 = "NetScp" wide
		$s2 = "TinyZBot.Properties.Resources.resources"
		$s3 = "Aoao WaterMark"
		$s4 = "Run_a_exe"
		$s5 = "netscp.exe"
		$s6 = "get_MainModule_WebReference_DefaultWS"
		$s7 = "remove_CheckFileMD5Completed"
		$s8 = "http://tempuri.org/"
		$s9 = "Zhoupin_Cleaver"
	condition:
		(($s1 and $s2) or ($s3 and $s4 and $s5) or ($s6 and $s7 and $s8) or $s9)
}

rule OPCLEAVER_ZhoupinExploitCrew
{
	meta:
		description = "Keywords used by attackers in Operation Cleaver"
		reference = "http://cylance.com/assets/Cleaver/Cylance_Operation_Cleaver_Report.pdf"
		date = "2014/12/02"
		author = "Cylance Inc."
		score = 70
	strings:
		$s1 = "zhoupin exploit crew" nocase
		$s2 = "zhopin exploit crew" nocase
	condition:
		1 of them
}

rule OPCLEAVER_antivirusdetector
{
	meta:
		description = "Hack tool used by attackers in Operation Cleaver"
		reference = "http://cylance.com/assets/Cleaver/Cylance_Operation_Cleaver_Report.pdf"
		date = "2014/12/02"
		author = "Cylance Inc."
		score = 70
	strings:
		$s1 = "getShadyProcess"
		$s2 = "getSystemAntiviruses"
		$s3 = "AntiVirusDetector"
	condition:
		all of them
}

rule OPCLEAVER_csext
{
	meta:
		description = "Backdoor used by attackers in Operation Cleaver"
		reference = "http://cylance.com/assets/Cleaver/Cylance_Operation_Cleaver_Report.pdf"
		date = "2014/12/02"
		author = "Cylance Inc."
		score = 70
	strings:
		$s1 = "COM+ System Extentions"
		$s2 = "csext.exe"
		$s3 = "COM_Extentions_bin"
	condition:
		all of them
}

rule OPCLEAVER_kagent
{
	meta:
		description = "Backdoor used by attackers in Operation Cleaver"
		reference = "http://cylance.com/assets/Cleaver/Cylance_Operation_Cleaver_Report.pdf"
		date = "2014/12/02"
		author = "Cylance Inc."
		score = 70
	strings:
		$s1 = "kill command is in last machine, going back"
		$s2 = "message data length in B64: %d Bytes"
	condition:
		all of them
}

rule OPCLEAVER_mimikatzWrapper
{
	meta:
		description = "Mimikatz Wrapper used by attackers in Operation Cleaver"
		reference = "http://cylance.com/assets/Cleaver/Cylance_Operation_Cleaver_Report.pdf"
		date = "2014/12/02"
		author = "Cylance Inc."
		score = 70
	strings:
		$s1 = "mimikatzWrapper"
		$s2 = "get_mimikatz"
	condition:
		all of them
}

rule OPCLEAVER_pvz_in
{
	meta:
		description = "Parviz tool used by attackers in Operation Cleaver"
		reference = "http://cylance.com/assets/Cleaver/Cylance_Operation_Cleaver_Report.pdf"
		date = "2014/12/02"
		author = "Cylance Inc."
		score = 70
	strings:
		$s1 = "LAST_TIME=00/00/0000:00:00PM$"
		$s2 = "if %%ERRORLEVEL%% == 1 GOTO line"
	condition:
		all of them
}

rule OPCLEAVER_pvz_out
{
	meta:
		description = "Parviz tool used by attackers in Operation Cleaver"
		reference = "http://cylance.com/assets/Cleaver/Cylance_Operation_Cleaver_Report.pdf"
		date = "2014/12/02"
		author = "Cylance Inc."
		score = 70
	strings:
		$s1 = "Network Connectivity Module" wide
		$s2 = "OSPPSVC" wide
	condition:
		all of them
}

rule OPCLEAVER_wndTest
{
	meta:
		description = "Backdoor used by attackers in Operation Cleaver"
		reference = "http://cylance.com/assets/Cleaver/Cylance_Operation_Cleaver_Report.pdf"
		date = "2014/12/02"
		author = "Cylance Inc."
		score = 70
	strings:
		$s1 = "[Alt]" wide
		$s2 = "<< %s >>:" wide
		$s3 = "Content-Disposition: inline; comp=%s; account=%s; product=%d;"
	condition:
		all of them
}

rule OPCLEAVER_zhCat
{
	meta:
		description = "Network tool used by Iranian hackers and used by attackers in Operation Cleaver"
		reference = "http://cylance.com/assets/Cleaver/Cylance_Operation_Cleaver_Report.pdf"
		date = "2014/12/02"
		author = "Cylance Inc."
		score = 70
	strings:
		$s1 = "Mozilla/4.0 ( compatible; MSIE 7.0; AOL 8.0 )" ascii fullword
		$s2 = "ABC ( A Big Company )" wide fullword
	condition:
		all of them
}

rule OPCLEAVER_zhLookUp
{
	meta:
		description = "Hack tool used by attackers in Operation Cleaver"
		reference = "http://cylance.com/assets/Cleaver/Cylance_Operation_Cleaver_Report.pdf"
		date = "2014/12/02"
		author = "Cylance Inc."
		score = 70
	strings:
		$s1 = "zhLookUp.Properties"
	condition:
		all of them
}

rule OPCLEAVER_zhmimikatz
{
	meta:
		description = "Mimikatz wrapper used by attackers in Operation Cleaver"
		reference = "http://cylance.com/assets/Cleaver/Cylance_Operation_Cleaver_Report.pdf"
		date = "2014/12/02"
		author = "Cylance Inc."
		score = 70
	strings:
		$s1 = "MimikatzRunner"
		$s2 = "zhmimikatz"
	condition:
		all of them
}

rule OPCLEAVER_Parviz_Developer
{
	meta:
		description = "Parviz developer known from Operation Cleaver"
		reference = "http://cylance.com/assets/Cleaver/Cylance_Operation_Cleaver_Report.pdf"
		date = "2014/12/02"
		author = "Florian Roth"
		score = 70
	strings:
		$s1 = "Users\\parviz\\documents\\" nocase
	condition:
		$s1
}

rule OPCLEAVER_CCProxy_Config
{
	meta:
		description = "CCProxy config known from Operation Cleaver"
		reference = "http://cylance.com/assets/Cleaver/Cylance_Operation_Cleaver_Report.pdf"
		date = "2014/12/02"
		author = "Florian Roth"
		score = 70
	strings:
		$s1 = "UserName=User-001" fullword ascii
		$s2 = "Web=1" fullword ascii
		$s3 = "Mail=1" fullword ascii
		$s4 = "FTP=0" fullword ascii
		$x1 = "IPAddressLow=78.109.194.114" fullword ascii
	condition:
		all of ($s*) or $x1
}

Rule Metadata

description
Keylogger used by attackers in Operation Cleaver
reference
http://cylance.com/assets/Cleaver/Cylance_Operation_Cleaver_Report.pdf
date
2014/12/02
author
Cylance Inc.

String Definitions

{"name":"$s1","value":"\"BackDoorLogger\""}
{"name":"$s2","value":"\"zhuAddress\""}

Threat Analysis

This YARA rule is designed to detect general threats.

Severity Level: High

The rule uses pattern matching to identify specific byte sequences, strings, or behavioral patterns associated with malicious activity.

Detection Capabilities

  • File-based detection for executables and documents
  • Memory scanning for running processes
  • Network traffic analysis support

Command Line Usage

# Scan a single file
yara OPCLEAVER_BackDoorLogger.yar /path/to/suspicious/file

# Scan a directory recursively
yara -r OPCLEAVER_BackDoorLogger.yar /path/to/directory/

# Scan with metadata output
yara -m OPCLEAVER_BackDoorLogger.yar target_file

# Scan process memory (Linux)
yara OPCLEAVER_BackDoorLogger.yar /proc/[pid]/exe

Integration Examples

Python (yara-python)

import yara
rules = yara.compile(filepath='OPCLEAVER_BackDoorLogger.yar')
matches = rules.match('/path/to/file')

ClamAV Integration

clamscan --yara-rules=OPCLEAVER_BackDoorLogger.yar /path/to/scan

Rule Information

YARA ID
YARA-2014-0060
Created
August 19, 2025
Last Updated
August 19, 2025
Last Imported
Never

Threat Intelligence

Risk Level High
Category general
Detection Confidence Analysis Pending
False Positive Rate Not Available
Last Seen in Wild No Data

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