Analysis
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max time kernel
150s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
20/05/2024, 00:34
Behavioral task
behavioral1
Sample
2024-05-20_389b6d1cce9f286045c25cea2b223fce_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-20_389b6d1cce9f286045c25cea2b223fce_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-20_389b6d1cce9f286045c25cea2b223fce_cryptolocker.exe
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Size
23KB
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MD5
389b6d1cce9f286045c25cea2b223fce
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SHA1
87872e6ce35e367581a49b4fcc0f9141d592d6b6
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SHA256
abae7d5289924b2e489cc4bbc94f34d507caf85e7da433f4d56a6730c5e3d54f
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SHA512
0d67eda7d2cded7f1ed40e1ef8bccb51337f6531f2a2785aa8bc988c2c6e63d6530ec5c825b18e055dc7c423baac90321cde5b8da0a9c9a51c01c257bba22c48
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SSDEEP
384:bVCPwFRuFn65arz1ZhdaXFXSCVQTLfjDp6HMJ26:bVCPwFRo6CpwXFXSqQXfjAsJN
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/3220-0-0x0000000008000000-0x000000000800E000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0007000000023276-13.dat CryptoLocker_rule2 behavioral2/memory/3672-17-0x0000000008000000-0x000000000800E000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3220-18-0x0000000008000000-0x000000000800E000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3672-27-0x0000000008000000-0x000000000800E000-memory.dmp CryptoLocker_rule2 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/3220-0-0x0000000008000000-0x000000000800E000-memory.dmp UPX behavioral2/files/0x0007000000023276-13.dat UPX behavioral2/memory/3672-17-0x0000000008000000-0x000000000800E000-memory.dmp UPX behavioral2/memory/3220-18-0x0000000008000000-0x000000000800E000-memory.dmp UPX behavioral2/memory/3672-27-0x0000000008000000-0x000000000800E000-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-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation 2024-05-20_389b6d1cce9f286045c25cea2b223fce_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3672 hasfj.exe -
resource yara_rule behavioral2/memory/3220-0-0x0000000008000000-0x000000000800E000-memory.dmp upx behavioral2/files/0x0007000000023276-13.dat upx behavioral2/memory/3672-17-0x0000000008000000-0x000000000800E000-memory.dmp upx behavioral2/memory/3220-18-0x0000000008000000-0x000000000800E000-memory.dmp upx behavioral2/memory/3672-27-0x0000000008000000-0x000000000800E000-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 3220 wrote to memory of 3672 3220 2024-05-20_389b6d1cce9f286045c25cea2b223fce_cryptolocker.exe 82 PID 3220 wrote to memory of 3672 3220 2024-05-20_389b6d1cce9f286045c25cea2b223fce_cryptolocker.exe 82 PID 3220 wrote to memory of 3672 3220 2024-05-20_389b6d1cce9f286045c25cea2b223fce_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-20_389b6d1cce9f286045c25cea2b223fce_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-20_389b6d1cce9f286045c25cea2b223fce_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3220 -
C:\Users\Admin\AppData\Local\Temp\hasfj.exe"C:\Users\Admin\AppData\Local\Temp\hasfj.exe"2⤵
- Executes dropped EXE
PID:3672
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
24KB
MD5e5fa24535c6c70f6bce5bb761110277c
SHA1126bab1f98fd6789004aeece01d9db14a2b4be17
SHA2569898b3d508cf557be265c6323db686c13d91f8a4d3775b37d26fcf5635fde92a
SHA512aa40a35725832941cd02a16038521b19314e9207dde18fe333ff6e31cbcf893094dcb870b9eb0fb035e04529eaf625483e980bba1d6d5e9bbbf770516b73bf5c