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
11/06/2024, 01:14
Behavioral task
behavioral1
Sample
2024-06-11_cd41dad994ae88ad27fe9d660eea357f_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-11_cd41dad994ae88ad27fe9d660eea357f_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-11_cd41dad994ae88ad27fe9d660eea357f_cryptolocker.exe
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Size
53KB
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MD5
cd41dad994ae88ad27fe9d660eea357f
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SHA1
76fa2dfe5c015f1aefeb0bf66280d09e5c79116b
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SHA256
f8ee28eaf6a1172c9d7ce6bab74af535f67cbea04df9e99807acebe94b54fee4
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SHA512
8ae1a167adac502754a5377e3320a07127df9f04a0e7d37eb2191753a2634db212715b3e80d5516bb3306d8f19049cf0b2a4b0428b535cc8a31a925a3500341c
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SSDEEP
768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtOXy:bODOw9acifAoc+vt
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/5016-0-0x0000000008000000-0x000000000800F000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x00070000000232a4-13.dat CryptoLocker_rule2 behavioral2/memory/5016-17-0x0000000008000000-0x000000000800F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3680-18-0x0000000008000000-0x000000000800F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3680-27-0x0000000008000000-0x000000000800F000-memory.dmp CryptoLocker_rule2 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/5016-0-0x0000000008000000-0x000000000800F000-memory.dmp UPX behavioral2/files/0x00070000000232a4-13.dat UPX behavioral2/memory/5016-17-0x0000000008000000-0x000000000800F000-memory.dmp UPX behavioral2/memory/3680-18-0x0000000008000000-0x000000000800F000-memory.dmp UPX behavioral2/memory/3680-27-0x0000000008000000-0x000000000800F000-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-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation 2024-06-11_cd41dad994ae88ad27fe9d660eea357f_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3680 lossy.exe -
resource yara_rule behavioral2/memory/5016-0-0x0000000008000000-0x000000000800F000-memory.dmp upx behavioral2/files/0x00070000000232a4-13.dat upx behavioral2/memory/5016-17-0x0000000008000000-0x000000000800F000-memory.dmp upx behavioral2/memory/3680-18-0x0000000008000000-0x000000000800F000-memory.dmp upx behavioral2/memory/3680-27-0x0000000008000000-0x000000000800F000-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 5016 wrote to memory of 3680 5016 2024-06-11_cd41dad994ae88ad27fe9d660eea357f_cryptolocker.exe 81 PID 5016 wrote to memory of 3680 5016 2024-06-11_cd41dad994ae88ad27fe9d660eea357f_cryptolocker.exe 81 PID 5016 wrote to memory of 3680 5016 2024-06-11_cd41dad994ae88ad27fe9d660eea357f_cryptolocker.exe 81
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-11_cd41dad994ae88ad27fe9d660eea357f_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-11_cd41dad994ae88ad27fe9d660eea357f_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5016 -
C:\Users\Admin\AppData\Local\Temp\lossy.exe"C:\Users\Admin\AppData\Local\Temp\lossy.exe"2⤵
- Executes dropped EXE
PID:3680
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
54KB
MD53f702b0cfdbb92521a24cf064923a12e
SHA1f544076102e958490b32942a5f88e129d8edefb9
SHA256644ea7282ac982e4d5e2a332e6f29677533a1691c3a2be8ca90512cf0d155996
SHA512a029f0268b85e0b736ce29c1e3f805264679b35adbd59dadee4fc559aa9c751d9ab0a2968e561500ad2a6f7bb7a2400f1de6cf7f8785a1fdb429ab3b15680f78