Analysis
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max time kernel
150s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20240221-en -
resource tags
arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system -
submitted
23/02/2024, 11:02
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-23_c9dd1680b1b34fc5d1fb66bddfd3548b_cryptolocker.exe
Resource
win7-20240220-en
Behavioral task
behavioral2
Sample
2024-02-23_c9dd1680b1b34fc5d1fb66bddfd3548b_cryptolocker.exe
Resource
win10v2004-20240221-en
General
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Target
2024-02-23_c9dd1680b1b34fc5d1fb66bddfd3548b_cryptolocker.exe
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Size
35KB
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MD5
c9dd1680b1b34fc5d1fb66bddfd3548b
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SHA1
f0fc1c0d97cb4cc5fd49b9cb62ffc21392441090
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SHA256
394d1f64fce15b2667c21ea8e5997126e1128b71ee753583e86df80312e6f5ca
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SHA512
c3342635248eaf12902fc939098212052a3dd27f01cb78ccb9b92085cba9b0230d897067bd6248687c49a3f6022d3a6071b693ae9f1cea03feb7d7146c9c3a58
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SSDEEP
384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSzn1KkZQYuAZF:b/yC4GyNM01GuQMNXw2PSj1POaZF
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x000a000000023243-12.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-1-5-21-910440534-423636034-2318342392-1000\Control Panel\International\Geo\Nation 2024-02-23_c9dd1680b1b34fc5d1fb66bddfd3548b_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3988 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 2188 wrote to memory of 3988 2188 2024-02-23_c9dd1680b1b34fc5d1fb66bddfd3548b_cryptolocker.exe 87 PID 2188 wrote to memory of 3988 2188 2024-02-23_c9dd1680b1b34fc5d1fb66bddfd3548b_cryptolocker.exe 87 PID 2188 wrote to memory of 3988 2188 2024-02-23_c9dd1680b1b34fc5d1fb66bddfd3548b_cryptolocker.exe 87
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-23_c9dd1680b1b34fc5d1fb66bddfd3548b_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-23_c9dd1680b1b34fc5d1fb66bddfd3548b_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2188 -
C:\Users\Admin\AppData\Local\Temp\retln.exe"C:\Users\Admin\AppData\Local\Temp\retln.exe"2⤵
- Executes dropped EXE
PID:3988
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
35KB
MD51cbec3a9763e1651814a1494cea4f718
SHA181792cdb9cbadee4d279459415e7976559be8e88
SHA256409df8a3fbc1ab13d5829bee234f0d24f662772c5dec3258fbfcef56c4bb4a3e
SHA512ac77438646ee735163210c7179892a8396c415465bb5065f9550fc5ae7077eee02402315962df1cf5403b0ea2f06368e936878e4b2880b4243801dad2cfa6546