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 23:05
Behavioral task
behavioral1
Sample
2024-05-30_734e66041844aeaea9485bfb7839026b_cryptolocker.exe
Resource
win7-20240419-en
Behavioral task
behavioral2
Sample
2024-05-30_734e66041844aeaea9485bfb7839026b_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-30_734e66041844aeaea9485bfb7839026b_cryptolocker.exe
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Size
52KB
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MD5
734e66041844aeaea9485bfb7839026b
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SHA1
a8d2cca6fe148c6427f14f0c63f15b15ed647d2f
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SHA256
9af8eb84827a3098ae2263bce4496904208c3b20f0fc093e7753fa2f9c161b65
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SHA512
f16f25daee5800cdb715aaa488a2840e0f0ead1c19aeb3fd42c860d503254a784f4b804adf786f91433f9085f82c79fe14458dbf8c34dc12a5b52f62fb71b3c5
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SSDEEP
768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtO2:bODOw9acifAoc+vx
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/1712-0-0x0000000008000000-0x000000000800F000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0006000000023276-13.dat CryptoLocker_rule2 behavioral2/memory/1712-17-0x0000000008000000-0x000000000800F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/5052-18-0x0000000008000000-0x000000000800F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/5052-27-0x0000000008000000-0x000000000800F000-memory.dmp CryptoLocker_rule2 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/1712-0-0x0000000008000000-0x000000000800F000-memory.dmp UPX behavioral2/files/0x0006000000023276-13.dat UPX behavioral2/memory/1712-17-0x0000000008000000-0x000000000800F000-memory.dmp UPX behavioral2/memory/5052-18-0x0000000008000000-0x000000000800F000-memory.dmp UPX behavioral2/memory/5052-27-0x0000000008000000-0x000000000800F000-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_734e66041844aeaea9485bfb7839026b_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 5052 lossy.exe -
resource yara_rule behavioral2/memory/1712-0-0x0000000008000000-0x000000000800F000-memory.dmp upx behavioral2/files/0x0006000000023276-13.dat upx behavioral2/memory/1712-17-0x0000000008000000-0x000000000800F000-memory.dmp upx behavioral2/memory/5052-18-0x0000000008000000-0x000000000800F000-memory.dmp upx behavioral2/memory/5052-27-0x0000000008000000-0x000000000800F000-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 1712 wrote to memory of 5052 1712 2024-05-30_734e66041844aeaea9485bfb7839026b_cryptolocker.exe 83 PID 1712 wrote to memory of 5052 1712 2024-05-30_734e66041844aeaea9485bfb7839026b_cryptolocker.exe 83 PID 1712 wrote to memory of 5052 1712 2024-05-30_734e66041844aeaea9485bfb7839026b_cryptolocker.exe 83
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-30_734e66041844aeaea9485bfb7839026b_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-30_734e66041844aeaea9485bfb7839026b_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1712 -
C:\Users\Admin\AppData\Local\Temp\lossy.exe"C:\Users\Admin\AppData\Local\Temp\lossy.exe"2⤵
- Executes dropped EXE
PID:5052
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
52KB
MD5404338b5846ce5531565b67f441e76dc
SHA13ab34268be626333e9f69550d5150d24b33d504e
SHA2564daf6234029fefd91e7673d47926ae81ebf20035e3c9a368ebc9e21de151860d
SHA512bd67dd82f1c8f188f4d6189de12f2eccc1559ebc30f2e12566fde08a4de89380350981b592d18e8421fa0782c77b08430229abfaaeae7765be31d23caebc438f