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Analysis
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max time kernel
150s -
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
11/04/2024, 07:56
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-11_efada5c6e1d8103d7a98ff6fda39bfa6_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-11_efada5c6e1d8103d7a98ff6fda39bfa6_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-04-11_efada5c6e1d8103d7a98ff6fda39bfa6_cryptolocker.exe
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Size
36KB
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MD5
efada5c6e1d8103d7a98ff6fda39bfa6
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SHA1
a5c760d4739bd3c8168828c536c746c88d6e8f83
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SHA256
fbc74f3416e98e68b138547ce502a206450232b0febd895a2bf592675d9d2e39
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SHA512
f70bfcc730cad377a2b51b7019c2559f936db9e2a1e01cc7d6035a7d1ba4427dba327ac499ca9352c935a3c59562b7bfd1a7a9dc3919d5af3814c7c5611c9880
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SSDEEP
384:bA74uGLLQRcsdeQ72ngEr4K7YmE8j60nrlwfjDUgIunIVpeNs23mAA6lmRgy:bA74zYcgT/Ekd0ryfjPIunqpeNswm9my
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x000a000000023209-12.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 2024-04-11_efada5c6e1d8103d7a98ff6fda39bfa6_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2880 hasfj.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 1332 wrote to memory of 2880 1332 2024-04-11_efada5c6e1d8103d7a98ff6fda39bfa6_cryptolocker.exe 86 PID 1332 wrote to memory of 2880 1332 2024-04-11_efada5c6e1d8103d7a98ff6fda39bfa6_cryptolocker.exe 86 PID 1332 wrote to memory of 2880 1332 2024-04-11_efada5c6e1d8103d7a98ff6fda39bfa6_cryptolocker.exe 86
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-11_efada5c6e1d8103d7a98ff6fda39bfa6_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-11_efada5c6e1d8103d7a98ff6fda39bfa6_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1332 -
C:\Users\Admin\AppData\Local\Temp\hasfj.exe"C:\Users\Admin\AppData\Local\Temp\hasfj.exe"2⤵
- Executes dropped EXE
PID:2880
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
37KB
MD5b37971c624139fc8d882de0ab9b625c3
SHA169fdcc2156cd322de7f774acc9d30d5c6e6da467
SHA256b85a969a52c691696f74aab1caa9592fb1d8b2c6bb26479cd8aaade6c2f29f05
SHA51209f47bb42f907e12700701db06b9e5cc97e5168b357ef795e48d06480ddab915eae8b885f5b31d104bfed83e4bf9bc4c1e657f0a6acebc6f782670a493e44610