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
22/02/2024, 17:48
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-22_aa64fef12286342a6b5de2fd9bfa853c_cryptolocker.exe
Resource
win7-20240220-en
Behavioral task
behavioral2
Sample
2024-02-22_aa64fef12286342a6b5de2fd9bfa853c_cryptolocker.exe
Resource
win10v2004-20240221-en
General
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Target
2024-02-22_aa64fef12286342a6b5de2fd9bfa853c_cryptolocker.exe
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Size
31KB
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MD5
aa64fef12286342a6b5de2fd9bfa853c
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SHA1
ba4466c2fb7148c92849694d428a46dc07c5d3b9
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SHA256
a916bf519645d34dc9a55f47fb864b9074406be5311a88dd5193ddef8262a3e0
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SHA512
e206e59e7fc494197258ae65c08d459a7fd66d6741ba65b09f1185f972511f3168a867a875daed6850c3be789f4fbe84bc272c1639501ac818bf53aea6604909
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SSDEEP
384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznUssoYL:b/yC4GyNM01GuQMNXw2PSjWoYL
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x0007000000023204-12.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-1-5-21-2828415587-3732861812-1919322417-1000\Control Panel\International\Geo\Nation 2024-02-22_aa64fef12286342a6b5de2fd9bfa853c_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4792 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 3904 wrote to memory of 4792 3904 2024-02-22_aa64fef12286342a6b5de2fd9bfa853c_cryptolocker.exe 88 PID 3904 wrote to memory of 4792 3904 2024-02-22_aa64fef12286342a6b5de2fd9bfa853c_cryptolocker.exe 88 PID 3904 wrote to memory of 4792 3904 2024-02-22_aa64fef12286342a6b5de2fd9bfa853c_cryptolocker.exe 88
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-22_aa64fef12286342a6b5de2fd9bfa853c_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-22_aa64fef12286342a6b5de2fd9bfa853c_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3904 -
C:\Users\Admin\AppData\Local\Temp\retln.exe"C:\Users\Admin\AppData\Local\Temp\retln.exe"2⤵
- Executes dropped EXE
PID:4792
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
32KB
MD5533b9b2805c6ed4944bec0d6be0ec4dd
SHA1415737c064168b442a055a405a22c6c154d9b35a
SHA256ede8df99d99dd15dedff2705d65c52485817a644946f58818c46715e69d3d2d2
SHA512887f72d098848aec2eeb231c8c753698c70645a748d904d3ce39a4634fa2dda5591aa70685fcfa7f73f75387f0da84ce44d5941feba611179c3e79585c7232b7