Analysis
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max time kernel
148s -
max time network
149s -
platform
windows7_x64 -
resource
win7-20240215-en -
resource tags
arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system -
submitted
21-04-2024 20:09
Behavioral task
behavioral1
Sample
2024-04-21_9f6b221d7eee85dcac8c7b62607c982d_cryptolocker.exe
Resource
win7-20240215-en
Behavioral task
behavioral2
Sample
2024-04-21_9f6b221d7eee85dcac8c7b62607c982d_cryptolocker.exe
Resource
win10v2004-20240412-en
General
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Target
2024-04-21_9f6b221d7eee85dcac8c7b62607c982d_cryptolocker.exe
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Size
38KB
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MD5
9f6b221d7eee85dcac8c7b62607c982d
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SHA1
3010b2fed059c7158d1419c53998ad80faf317e9
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SHA256
520c910b5f6988109349fabdab21c4054b7484c718c66664723154588276e58a
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SHA512
e2d6f2df1cb219a386e947d2fd08a5d7748437c01d9ec73cabaa94a06ae55faf648185aa811cf96414058b0631958a4272ad5271ca6b0d6c9582b20f979b2f14
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SSDEEP
768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY9Z:qDdFJy3QMOtEvwDpjjWMl7TS
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral1/memory/2980-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/files/0x000c00000001233c-11.dat CryptoLocker_rule2 behavioral1/memory/2980-15-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2976-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2976-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral1/memory/2980-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/files/0x000c00000001233c-11.dat CryptoLocker_set1 behavioral1/memory/2980-15-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/memory/2976-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/memory/2976-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral1/memory/2980-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/files/0x000c00000001233c-11.dat UPX behavioral1/memory/2980-15-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/memory/2976-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/memory/2976-27-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
Executes dropped EXE 1 IoCs
pid Process 2976 asih.exe -
Loads dropped DLL 1 IoCs
pid Process 2980 2024-04-21_9f6b221d7eee85dcac8c7b62607c982d_cryptolocker.exe -
resource yara_rule behavioral1/memory/2980-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/files/0x000c00000001233c-11.dat upx behavioral1/memory/2980-15-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/memory/2976-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/memory/2976-27-0x0000000000500000-0x0000000000510000-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 4 IoCs
description pid Process procid_target PID 2980 wrote to memory of 2976 2980 2024-04-21_9f6b221d7eee85dcac8c7b62607c982d_cryptolocker.exe 28 PID 2980 wrote to memory of 2976 2980 2024-04-21_9f6b221d7eee85dcac8c7b62607c982d_cryptolocker.exe 28 PID 2980 wrote to memory of 2976 2980 2024-04-21_9f6b221d7eee85dcac8c7b62607c982d_cryptolocker.exe 28 PID 2980 wrote to memory of 2976 2980 2024-04-21_9f6b221d7eee85dcac8c7b62607c982d_cryptolocker.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-21_9f6b221d7eee85dcac8c7b62607c982d_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-21_9f6b221d7eee85dcac8c7b62607c982d_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2980 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2976
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
38KB
MD52f974bc65dc2b4c9d4342d8ea306ec72
SHA13116e57ad4c404ed9b58c733855da3942ead8e2e
SHA256f55836e89ceb0e8607604581a0f2da65a967f3ca4febfe431198751a868ae310
SHA51265ec20ee1de5f4b6dba43b70fe28d5f386d3abe936f48179e3f9ddfafa0b37a1c032389f5f92493c9f3f565b330766c2e3b4ca4b1bf764cf01b31ff3a2cf1226