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Analysis
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max time kernel
150s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
21/05/2024, 15:33
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-21_3c88f406b1be6fb307748c01057ad6a1_cryptolocker.exe
Resource
win7-20240215-en
Behavioral task
behavioral2
Sample
2024-05-21_3c88f406b1be6fb307748c01057ad6a1_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-21_3c88f406b1be6fb307748c01057ad6a1_cryptolocker.exe
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Size
33KB
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MD5
3c88f406b1be6fb307748c01057ad6a1
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SHA1
63c5207a2186771ed516e6789712cf75e915814d
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SHA256
160a48216060c0c84241ef6376f8b735b9742dc1a54020749533a0f6f2247506
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SHA512
daabe2e1ee2ef6bdbb72b78365311140777dc3609fcce30613e24e3af2c42b805462360c70b1d739f2d585655c8b060c765168dca656c29c5ee754eae9c48f24
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SSDEEP
384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznStEkcs828:b/yC4GyNM01GuQMNXw2PSjSKkc9X
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x0008000000022f51-12.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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation 2024-05-21_3c88f406b1be6fb307748c01057ad6a1_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3972 retln.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 2948 wrote to memory of 3972 2948 2024-05-21_3c88f406b1be6fb307748c01057ad6a1_cryptolocker.exe 83 PID 2948 wrote to memory of 3972 2948 2024-05-21_3c88f406b1be6fb307748c01057ad6a1_cryptolocker.exe 83 PID 2948 wrote to memory of 3972 2948 2024-05-21_3c88f406b1be6fb307748c01057ad6a1_cryptolocker.exe 83
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-21_3c88f406b1be6fb307748c01057ad6a1_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-21_3c88f406b1be6fb307748c01057ad6a1_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2948 -
C:\Users\Admin\AppData\Local\Temp\retln.exe"C:\Users\Admin\AppData\Local\Temp\retln.exe"2⤵
- Executes dropped EXE
PID:3972
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
34KB
MD5fdc8cd75175c26adb5ffbb8ae478761e
SHA19d800feed23d052ab7529689395e876ddc7d393f
SHA25617208e1155e3d82328f1077b72b7622b072f2dc11338c969b7598ff0ea132765
SHA5129430c2175cb80bff25e60e9eaa53a3a9623c5b6dd2cdd1eb66d3fa4ad8df73683d15eeafd5e1d56076251c96ec8b834f61fcce6cf1ccecefa5f84aac29dfbb2f