ransomware_ZZ_azov_wiper
YARA-2022-0263
Critical
general
Active
Detects original and backdoored files with new and old versions of azov ransomware - polymorphic wiper
ransomware_ZZ_azov_wiper.yar
Valid Syntax
import "pe"
rule ransomware_ZZ_azov_wiper {
meta:
description = "Detects original and backdoored files with new and old versions of azov ransomware - polymorphic wiper"
author = "Jiri Vinopal (jiriv)"
date = "2022-11-14"
hash_azov_new = "650f0d694c0928d88aeeed649cf629fc8a7bec604563bca716b1688227e0cc7e"
hash_azov_old = "b102ed1018de0b7faea37ca86f27ba3025c0c70f28417ac3e9ef09d32617f801"
report = "https://research.checkpoint.com/2022/pulling-the-curtains-on-azov-ransomware-not-a-skidsware-but-polymorphic-wiper/"
strings:
// Opcodes of allocating and decrypting shellcode routine
$unpacking_azov_new = { 48 83 ec ?? 58 48 01 c8 48 81 ec ?? ?? ?? ?? 48 83 ec ?? 40 80 e4 ?? c6 45 ?? 56 c6 45 ?? 69 c6 45 ?? 72 c6 45 ?? 74 c6 45 ?? 75 c6 45 ?? 61 c6 45 ?? 6c c6 45 ?? 41 c6 45 ?? 6c c6 45 ?? 6c c6 45 ?? 6f c6 45 ?? 63 c6 45 ?? 00 48 89 74 24 ?? 48 83 ec ?? 48 83 c4 ?? 48 8b 4c 24 ?? 48 8d 55 ?? ff d0 48 83 ec ?? 48 c7 04 24 ?? ?? ?? ?? 48 83 c4 ?? 48 8b 4c 24 ?? 48 c7 c2 ?? ?? ?? ?? 49 c7 c0 ?? ?? ?? ?? 49 c7 c1 ?? ?? ?? ?? ff d0 48 c7 c1 ?? ?? ?? ?? 4c 8d 0d ?? ?? ?? ?? 48 ff c9 41 8a 14 09 88 14 08 48 85 c9 75 ?? 48 c7 c1 ?? ?? ?? ?? 41 b9 ?? ?? ?? ?? 41 ba ?? ?? ?? ?? 48 ff c9 8a 14 08 44 30 ca 88 14 08 41 81 ea ?? ?? ?? ?? 45 01 d1 41 81 c1 ?? ?? ?? ?? 41 81 c2 ?? ?? ?? ?? 41 d1 c1 48 85 c9 }
$unpacking_azov_old = { 48 01 c8 48 05 ?? ?? ?? ?? 48 81 c1 ?? ?? ?? ?? 48 81 ec ?? ?? ?? ?? 48 83 ec ?? 40 80 e4 ?? c6 45 ?? 56 c6 45 ?? 69 c6 45 ?? 72 c6 45 ?? 74 c6 45 ?? 75 c6 45 ?? 61 c6 45 ?? 6c c6 45 ?? 41 c6 45 ?? 6c c6 45 ?? 6c c6 45 ?? 6f c6 45 ?? 63 c6 45 ?? 00 48 83 e1 ?? 48 01 f1 48 8d 55 ?? ff d0 48 83 ec ?? 48 c7 04 24 ?? ?? ?? ?? 48 83 c4 ?? 48 8b 4c 24 ?? 48 c7 c2 ?? ?? ?? ?? 49 c7 c0 ?? ?? ?? ?? 49 c7 c1 ?? ?? ?? ?? ff d0 48 c7 c1 ?? ?? ?? ?? 4c 8d 0d ?? ?? ?? ?? 48 ff c9 41 8a 14 09 88 14 08 48 85 c9 }
condition:
uint16(0) == 0x5a4d and pe.is_64bit() and
any of ($unpacking_azov_*)
}
Rule Metadata
description
Detects original and backdoored files with new and old versions of azov ransomware - polymorphic wiper
author
Jiri Vinopal (jiriv)
date
2022-11-14
hash_azov_new
650f0d694c0928d88aeeed649cf629fc8a7bec604563bca716b1688227e0cc7e
hash_azov_old
b102ed1018de0b7faea37ca86f27ba3025c0c70f28417ac3e9ef09d32617f801
report
https://research.checkpoint.com/2022/pulling-the-curtains-on-azov-ransomware-not-a-skidsware-but-polymorphic-wiper/
String Definitions
{"name":"$unpacking_azov_new","value":"{ 48 83 ec ?? 58 48 01 c8 48 81 ec ?? ?? ?? ?? 48 83 ec ?? 40 80 e4 ?? c6 45 ?? 56 c6 45 ?? 69 c6 45 ?? 72 c6 45 ?? 74 c6 45 ?? 75 c6 45 ?? 61 c6 45 ?? 6c c6 45 ?? 41 c6 45 ?? 6c c6 45 ?? 6c c6 45 ?? 6f c6 45 ?? 63 c6 45 ?? 00 48 89 74 24 ?? 48 83 ec ?? 48 83 c4 ?? 48 8b 4c 24 ?? 48 8d 55 ?? ff d0 48 83 ec ?? 48 c7 04 24 ?? ?? ?? ?? 48 83 c4 ?? 48 8b 4c 24 ?? 48 c7 c2 ?? ?? ?? ?? 49 c7 c0 ?? ?? ?? ?? 49 c7 c1 ?? ?? ?? ?? ff d0 48 c7 c1 ?? ?? ?? ?? 4c 8d 0d ?? ?? ?? ?? 48 ff c9 41 8a 14 09 88 14 08 48 85 c9 75 ?? 48 c7 c1 ?? ?? ?? ?? 41 b9 ?? ?? ?? ?? 41 ba ?? ?? ?? ?? 48 ff c9 8a 14 08 44 30 ca 88 14 08 41 81 ea ?? ?? ?? ?? 45 01 d1 41 81 c1 ?? ?? ?? ?? 41 81 c2 ?? ?? ?? ?? 41 d1 c1 48 85 c9 }"}
{"name":"$unpacking_azov_old","value":"{ 48 01 c8 48 05 ?? ?? ?? ?? 48 81 c1 ?? ?? ?? ?? 48 81 ec ?? ?? ?? ?? 48 83 ec ?? 40 80 e4 ?? c6 45 ?? 56 c6 45 ?? 69 c6 45 ?? 72 c6 45 ?? 74 c6 45 ?? 75 c6 45 ?? 61 c6 45 ?? 6c c6 45 ?? 41 c6 45 ?? 6c c6 45 ?? 6c c6 45 ?? 6f c6 45 ?? 63 c6 45 ?? 00 48 83 e1 ?? 48 01 f1 48 8d 55 ?? ff d0 48 83 ec ?? 48 c7 04 24 ?? ?? ?? ?? 48 83 c4 ?? 48 8b 4c 24 ?? 48 c7 c2 ?? ?? ?? ?? 49 c7 c0 ?? ?? ?? ?? 49 c7 c1 ?? ?? ?? ?? ff d0 48 c7 c1 ?? ?? ?? ?? 4c 8d 0d ?? ?? ?? ?? 48 ff c9 41 8a 14 09 88 14 08 48 85 c9 }"}
Threat Analysis
This YARA rule is designed to detect general threats.
Severity Level: Critical
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 ransomware_ZZ_azov_wiper.yar /path/to/suspicious/file # Scan a directory recursively yara -r ransomware_ZZ_azov_wiper.yar /path/to/directory/ # Scan with metadata output yara -m ransomware_ZZ_azov_wiper.yar target_file # Scan process memory (Linux) yara ransomware_ZZ_azov_wiper.yar /proc/[pid]/exe
Integration Examples
Python (yara-python)
import yara
rules = yara.compile(filepath='ransomware_ZZ_azov_wiper.yar')
matches = rules.match('/path/to/file')
ClamAV Integration
clamscan --yara-rules=ransomware_ZZ_azov_wiper.yar /path/to/scan
Rule Information
YARA ID
YARA-2022-0263
Author
Repository
Created
August 19, 2025
Last Updated
August 19, 2025
Last Imported
Never
Threat Intelligence
Risk Level
Critical
Category
general
Detection Confidence
Analysis Pending
False Positive Rate
Not Available
Last Seen in Wild
No Data
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