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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
30/05/2024, 06:52
Behavioral task
behavioral1
Sample
2024-05-30_98a3f4b1289b3924eaceabdf82a5f5a1_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-30_98a3f4b1289b3924eaceabdf82a5f5a1_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-30_98a3f4b1289b3924eaceabdf82a5f5a1_cryptolocker.exe
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Size
24KB
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MD5
98a3f4b1289b3924eaceabdf82a5f5a1
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SHA1
82925b3518b637f6f89903407e008dc70f8574c4
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SHA256
f90df14e16fefa05afb489ce586e8b4c6ce196a0a594032a82748d4b304ccf91
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SHA512
ce9f61ca8bb2d95a2dfa89b901c01518ac26f615d3f71e12a9ff4c75242fc8646bc9b75c2ccfac04da08f5f17bfcdcd3bbc6a0aede3f2f4920da0abc2f07c1b2
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SSDEEP
384:bVCPwFRuFn65arz1ZhdaXFXSCVQTLfjDp6HMJ2Aw:bVCPwFRo6CpwXFXSqQXfjAsJ0
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/1280-0-0x0000000008000000-0x000000000800E000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x00090000000226e8-13.dat CryptoLocker_rule2 behavioral2/memory/4428-19-0x0000000008000000-0x000000000800E000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1280-18-0x0000000008000000-0x000000000800E000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4428-28-0x0000000008000000-0x000000000800E000-memory.dmp CryptoLocker_rule2 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/1280-0-0x0000000008000000-0x000000000800E000-memory.dmp UPX behavioral2/files/0x00090000000226e8-13.dat UPX behavioral2/memory/4428-19-0x0000000008000000-0x000000000800E000-memory.dmp UPX behavioral2/memory/1280-18-0x0000000008000000-0x000000000800E000-memory.dmp UPX behavioral2/memory/4428-28-0x0000000008000000-0x000000000800E000-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 2024-05-30_98a3f4b1289b3924eaceabdf82a5f5a1_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4428 hasfj.exe -
resource yara_rule behavioral2/memory/1280-0-0x0000000008000000-0x000000000800E000-memory.dmp upx behavioral2/files/0x00090000000226e8-13.dat upx behavioral2/memory/4428-19-0x0000000008000000-0x000000000800E000-memory.dmp upx behavioral2/memory/1280-18-0x0000000008000000-0x000000000800E000-memory.dmp upx behavioral2/memory/4428-28-0x0000000008000000-0x000000000800E000-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 1280 wrote to memory of 4428 1280 2024-05-30_98a3f4b1289b3924eaceabdf82a5f5a1_cryptolocker.exe 83 PID 1280 wrote to memory of 4428 1280 2024-05-30_98a3f4b1289b3924eaceabdf82a5f5a1_cryptolocker.exe 83 PID 1280 wrote to memory of 4428 1280 2024-05-30_98a3f4b1289b3924eaceabdf82a5f5a1_cryptolocker.exe 83
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-30_98a3f4b1289b3924eaceabdf82a5f5a1_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-30_98a3f4b1289b3924eaceabdf82a5f5a1_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1280 -
C:\Users\Admin\AppData\Local\Temp\hasfj.exe"C:\Users\Admin\AppData\Local\Temp\hasfj.exe"2⤵
- Executes dropped EXE
PID:4428
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
24KB
MD55dbc9e4c6386d08428b32ef2536596ff
SHA1a54345c4c8a426f4a5523b7dd58ec99efd5e9753
SHA25617102125e040d4dd3ff7222665dfb9bc44a2929d2727c2a69a01d38a6b8a4517
SHA5120745e24b2827f1fdfef2021439078e0896935ec3f49041ba4533d5f124b9b54b9f16490f1353f8b7f1428b653745bdb44a30056e02520de25d1570460a8574d2