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Analysis
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max time kernel
149s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
25/03/2024, 12:48
Static task
static1
Behavioral task
behavioral1
Sample
2024-03-25_7e39dc4026906543a589eec03e03e842_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-03-25_7e39dc4026906543a589eec03e03e842_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-03-25_7e39dc4026906543a589eec03e03e842_cryptolocker.exe
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Size
34KB
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MD5
7e39dc4026906543a589eec03e03e842
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SHA1
34f36cf123cf45eb5b735ac58ad3a6308f14541e
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SHA256
763eb1caca66418946b7a073d36c2582369be78e176bd97a7246bfec29889125
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SHA512
916119a04f0c60f7df66f341ba01abc074e8a79900f3d3599f068e929901107e074573c4922692fa0eb3f7397c8c5c5897866708bebecc24c76ef8408ee82a02
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SSDEEP
384:bmM0V/YPvnr801TRoUGPh4TKt6ATt1DqgPa3s/zzoCt9/B1RU3qE4kbg8:b7o/2n1TCraU6GD1a4Xt9bRU6zAx
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x000700000001e59e-12.dat CryptoLocker_rule2 -
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-1-5-21-399997616-3400990511-967324271-1000\Control Panel\International\Geo\Nation 2024-03-25_7e39dc4026906543a589eec03e03e842_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2120 rewok.exe -
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 432 wrote to memory of 2120 432 2024-03-25_7e39dc4026906543a589eec03e03e842_cryptolocker.exe 87 PID 432 wrote to memory of 2120 432 2024-03-25_7e39dc4026906543a589eec03e03e842_cryptolocker.exe 87 PID 432 wrote to memory of 2120 432 2024-03-25_7e39dc4026906543a589eec03e03e842_cryptolocker.exe 87
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-03-25_7e39dc4026906543a589eec03e03e842_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-03-25_7e39dc4026906543a589eec03e03e842_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:432 -
C:\Users\Admin\AppData\Local\Temp\rewok.exe"C:\Users\Admin\AppData\Local\Temp\rewok.exe"2⤵
- Executes dropped EXE
PID:2120
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
34KB
MD5e3ddf393c3fc0fcac6795de0713a99ee
SHA1e806593d9cd8ccb436c80228d11a4194a3bd9e8b
SHA25649a43e6a12ed6cf65a81c190e5e5bf1cf8f749a61b09c2020b54a52b1c1a1143
SHA512efa92e2764728a8da78e67f3524ed1e36d1532140a308bde8eb233fdb59262e2756bbe77d2093e7ae83514c42e7f9a86c6d43e5d494544bc528ea997c295fbf5