Analysis
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max time kernel
150s -
max time network
155s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
10/06/2024, 21:40
Behavioral task
behavioral1
Sample
2024-06-10_bd4d9f46cb9b087e24b4e8c8760426ce_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-10_bd4d9f46cb9b087e24b4e8c8760426ce_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-10_bd4d9f46cb9b087e24b4e8c8760426ce_cryptolocker.exe
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Size
91KB
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MD5
bd4d9f46cb9b087e24b4e8c8760426ce
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SHA1
c2eaf98e5717e341f3cc6af4b25275524d1d4a20
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SHA256
54ac269031d5b61fc5706b847b9796d1de4985612d8b48dbd52def06c5651d54
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SHA512
0dde13fe86820c424d78bb385ea3eea815432f610a8f37877c564ca4db243da5e0f01df93a4312a3d8a8d5bd4afd1c92d26045184188c57bde7df3b373e1ecea
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SSDEEP
1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAA/8r:n6a+1SEOtEvwDpjYYvQd2PX
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/3584-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000a000000021677-13.dat CryptoLocker_rule2 behavioral2/memory/5084-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3584-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/5084-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/3584-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000a000000021677-13.dat CryptoLocker_set1 behavioral2/memory/5084-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/3584-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/5084-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/3584-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000a000000021677-13.dat UPX behavioral2/memory/5084-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/3584-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/5084-27-0x0000000000500000-0x0000000000510000-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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation 2024-06-10_bd4d9f46cb9b087e24b4e8c8760426ce_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 5084 asih.exe -
resource yara_rule behavioral2/memory/3584-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000a000000021677-13.dat upx behavioral2/memory/5084-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/3584-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/5084-27-0x0000000000500000-0x0000000000510000-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 3584 wrote to memory of 5084 3584 2024-06-10_bd4d9f46cb9b087e24b4e8c8760426ce_cryptolocker.exe 82 PID 3584 wrote to memory of 5084 3584 2024-06-10_bd4d9f46cb9b087e24b4e8c8760426ce_cryptolocker.exe 82 PID 3584 wrote to memory of 5084 3584 2024-06-10_bd4d9f46cb9b087e24b4e8c8760426ce_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-10_bd4d9f46cb9b087e24b4e8c8760426ce_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-10_bd4d9f46cb9b087e24b4e8c8760426ce_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3584 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:5084
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
91KB
MD5be1c400b8603fc77dacd656ecf03673c
SHA15a2e4ab51f30b32543d7fdc2f72097fc9ac57be5
SHA25621e0dc47e7dc2a81432d7a85b98568884337f1796548a48e348510cb8e6bf80d
SHA5124e365d65f4d3349054fbcf6bb788277085dadb8491c915309f258e848495ae1cf653efcf40dac21bb02f9169bfb02af06cdfea1e0fb55cc205fc3f9ced75ea08