Analysis
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max time kernel
150s -
max time network
146s -
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, 10:38
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-23_408d13b8d7884403cba28a20db0d0992_cryptolocker.exe
Resource
win7-20240215-en
Behavioral task
behavioral2
Sample
2024-02-23_408d13b8d7884403cba28a20db0d0992_cryptolocker.exe
Resource
win10v2004-20240221-en
General
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Target
2024-02-23_408d13b8d7884403cba28a20db0d0992_cryptolocker.exe
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Size
27KB
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MD5
408d13b8d7884403cba28a20db0d0992
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SHA1
783bb564696be5048ae73ace63ef2c7a503f8748
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SHA256
4cdbb19aaf03032eab2123e81d2e1b33c2992996bb8179dbb87fee0026418edf
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SHA512
d60b6a7c5be2754b69e61a74129061eb045b18cdffa3d850e9999f6b33a5394091a53ed39cca5438858c0a135f6748597cb1e15a0fbe7879e685d669c07cc048
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SSDEEP
384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zznum+Un:b/yC4GyNM01GuQMNXum+6
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x0007000000023249-12.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_408d13b8d7884403cba28a20db0d0992_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3872 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 1336 wrote to memory of 3872 1336 2024-02-23_408d13b8d7884403cba28a20db0d0992_cryptolocker.exe 88 PID 1336 wrote to memory of 3872 1336 2024-02-23_408d13b8d7884403cba28a20db0d0992_cryptolocker.exe 88 PID 1336 wrote to memory of 3872 1336 2024-02-23_408d13b8d7884403cba28a20db0d0992_cryptolocker.exe 88
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-23_408d13b8d7884403cba28a20db0d0992_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-23_408d13b8d7884403cba28a20db0d0992_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1336 -
C:\Users\Admin\AppData\Local\Temp\retln.exe"C:\Users\Admin\AppData\Local\Temp\retln.exe"2⤵
- Executes dropped EXE
PID:3872
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
28KB
MD5f5026939b3fb62b116119324eadd796e
SHA1d3c94e774db015f07228e3aec519f663460562c8
SHA256f25b96d60b733d39cb181f68654786477d8bd1248a739d3045694e794260b778
SHA512829a165939e3ec62eb83963728c71fd66aec27dfa2846d679a54201aad99dc2ed7d335efc100546a7baea704e6b0d3b0f4deb3f7c35ee9c076dccd0a2ba41a27