Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
12-02-2024 17:57
Behavioral task
behavioral1
Sample
2024-02-12_f7bab1dd4fa17196ee63758d8b6ec7d2_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-12_f7bab1dd4fa17196ee63758d8b6ec7d2_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-02-12_f7bab1dd4fa17196ee63758d8b6ec7d2_cryptolocker.exe
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Size
80KB
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MD5
f7bab1dd4fa17196ee63758d8b6ec7d2
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SHA1
9adb2b37fb96def27a7eaafedd55f4e352c94c74
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SHA256
d7d5997039f9f3f9f4c4984af6db1e60528edfd2ef33c73a8ea301b1403b21f5
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SHA512
5b5fadce0ec92a7ffb40754bd7bb738d4bed2bc56503805fb09dcbdb829bb5244c76240b7512690c373658eb338b273a538b16ae9b766866d22fc157b0819b43
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SSDEEP
1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdWZm:T6a+rdOOtEvwDpjNtn
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
Processes:
resource yara_rule behavioral2/memory/2244-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_rule2 behavioral2/memory/2244-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/5116-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
Processes:
resource yara_rule behavioral2/memory/2244-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_set1 behavioral2/memory/2244-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/5116-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
Processes:
resource yara_rule behavioral2/memory/2244-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX C:\Users\Admin\AppData\Local\Temp\asih.exe UPX behavioral2/memory/2244-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/5116-26-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
2024-02-12_f7bab1dd4fa17196ee63758d8b6ec7d2_cryptolocker.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation 2024-02-12_f7bab1dd4fa17196ee63758d8b6ec7d2_cryptolocker.exe -
Executes dropped EXE 1 IoCs
Processes:
asih.exepid process 5116 asih.exe -
Processes:
resource yara_rule behavioral2/memory/2244-0-0x0000000000500000-0x0000000000510000-memory.dmp upx C:\Users\Admin\AppData\Local\Temp\asih.exe upx behavioral2/memory/2244-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/5116-26-0x0000000000500000-0x0000000000510000-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
Processes:
2024-02-12_f7bab1dd4fa17196ee63758d8b6ec7d2_cryptolocker.exedescription pid process target process PID 2244 wrote to memory of 5116 2244 2024-02-12_f7bab1dd4fa17196ee63758d8b6ec7d2_cryptolocker.exe asih.exe PID 2244 wrote to memory of 5116 2244 2024-02-12_f7bab1dd4fa17196ee63758d8b6ec7d2_cryptolocker.exe asih.exe PID 2244 wrote to memory of 5116 2244 2024-02-12_f7bab1dd4fa17196ee63758d8b6ec7d2_cryptolocker.exe asih.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-12_f7bab1dd4fa17196ee63758d8b6ec7d2_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-12_f7bab1dd4fa17196ee63758d8b6ec7d2_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2244 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:5116
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
81KB
MD53d92cfa492dcb5ca8c020f67cabfbd12
SHA191cd9c79f1e2f6d0c20b7217dbc9bebface106fc
SHA256d8ad2c8dfa318dc36bce048c702c559bc3c8e25a58a5309fad9ea374a5f261a5
SHA512c6a1c6982a1b2fa966ee68a0bcf1c84109fe7fbc54ffebc8905bd5bdd4216f4536f15d7b553d459f88859bde1e9190ae3cc5d7040307129aa0e1d7ae890e8b80