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Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
09/04/2024, 04:35
Behavioral task
behavioral1
Sample
2024-04-09_f128db1ad367c7b53121790f817751f2_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-09_f128db1ad367c7b53121790f817751f2_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-04-09_f128db1ad367c7b53121790f817751f2_cryptolocker.exe
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Size
105KB
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MD5
f128db1ad367c7b53121790f817751f2
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SHA1
72303c3005b850f70d3af45921d4d10c9cb083ee
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SHA256
4ef136de3e163df7c74fd15ae813bdd4921ad37a2a828736a181143445ca0f0a
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SHA512
7ec69dd24ad13c998891cdc74a14bb43fc1ffe5afb61c25a22569c069a97e4f13977e02859d0cd7861fba051c264271f568a0ba1cd569324ae81bd6e6d290b9d
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SSDEEP
1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalRn5iF1j6GksurJ:1nK6a+qdOOtEvwDpjI
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/4032-0-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000800000002301d-13.dat CryptoLocker_rule2 behavioral2/memory/1824-17-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 behavioral2/memory/4032-18-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 behavioral2/memory/1824-27-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/4032-0-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 behavioral2/files/0x000800000002301d-13.dat CryptoLocker_set1 behavioral2/memory/1824-17-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 behavioral2/memory/4032-18-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 behavioral2/memory/1824-27-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/4032-0-0x0000000000500000-0x000000000050F311-memory.dmp UPX behavioral2/files/0x000800000002301d-13.dat UPX behavioral2/memory/1824-17-0x0000000000500000-0x000000000050F311-memory.dmp UPX behavioral2/memory/4032-18-0x0000000000500000-0x000000000050F311-memory.dmp UPX behavioral2/memory/1824-27-0x0000000000500000-0x000000000050F311-memory.dmp UPX -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\Control Panel\International\Geo\Nation 2024-04-09_f128db1ad367c7b53121790f817751f2_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 1824 asih.exe -
resource yara_rule behavioral2/memory/4032-0-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral2/files/0x000800000002301d-13.dat upx behavioral2/memory/1824-17-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral2/memory/4032-18-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral2/memory/1824-27-0x0000000000500000-0x000000000050F311-memory.dmp upx -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 4032 wrote to memory of 1824 4032 2024-04-09_f128db1ad367c7b53121790f817751f2_cryptolocker.exe 86 PID 4032 wrote to memory of 1824 4032 2024-04-09_f128db1ad367c7b53121790f817751f2_cryptolocker.exe 86 PID 4032 wrote to memory of 1824 4032 2024-04-09_f128db1ad367c7b53121790f817751f2_cryptolocker.exe 86
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-09_f128db1ad367c7b53121790f817751f2_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-09_f128db1ad367c7b53121790f817751f2_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4032 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:1824
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
105KB
MD5d237ed102756f6c3bd98a9b6bbdbc952
SHA19055b2765be582401767c025a93891d673349a5c
SHA2561baf9e2f764cb43c360f2c0b46f84ec19fe175c449bf33ea9db95f49dccbde92
SHA512e9106d1553c2efb3f8364ae47a99429849537b4b84cb0dd28cfd113a964aa6b651f86918422c30d599065408a1d179b079b39fb3b86c03096184fd1af2cf332e