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Analysis
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max time kernel
92s -
max time network
161s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
04/02/2024, 03:49
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-04_a01ad8aef189854014da85ec7962d5de_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-04_a01ad8aef189854014da85ec7962d5de_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-02-04_a01ad8aef189854014da85ec7962d5de_cryptolocker.exe
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Size
39KB
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MD5
a01ad8aef189854014da85ec7962d5de
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SHA1
1a10ad75ea3c0c3e5d5873445679d4eeca7bee96
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SHA256
db1f558858708ef6bb5d0361d19684926437bb9995c22168aca0d6c8f029b059
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SHA512
4ed7cb97546db1a3d3c62ddf7cc98acc6794ffe17a539e2f814758933646516a4f3814743e91abf436d5036aa11e6a5bc7b9bb8c6293c737c4163cff745ecc16
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SSDEEP
384:60VkMq01bJ3wtEwPS8HLEh+Jagz+3be+26aIIcVRYpetOOtEvwDpjqIGRmdHzOOK:6Qz7yVEhs9+4OR7tOOtEvwDpjLHqh6/c
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/1944-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0007000000023116-13.dat CryptoLocker_rule2 behavioral2/memory/1944-14-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2168-54-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/1944-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/files/0x0007000000023116-13.dat CryptoLocker_set1 behavioral2/memory/1944-14-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/2168-54-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 -
Detects executables built or packed with MPress PE compressor 4 IoCs
resource yara_rule behavioral2/memory/1944-0-0x0000000000500000-0x000000000050F000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/files/0x0007000000023116-13.dat INDICATOR_EXE_Packed_MPress behavioral2/memory/1944-14-0x0000000000500000-0x000000000050F000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/memory/2168-54-0x0000000000500000-0x000000000050F000-memory.dmp INDICATOR_EXE_Packed_MPress -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation 2024-02-04_a01ad8aef189854014da85ec7962d5de_cryptolocker.exe Key value queried \REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation misid.exe -
Executes dropped EXE 1 IoCs
pid Process 2168 misid.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 1944 wrote to memory of 2168 1944 2024-02-04_a01ad8aef189854014da85ec7962d5de_cryptolocker.exe 85 PID 1944 wrote to memory of 2168 1944 2024-02-04_a01ad8aef189854014da85ec7962d5de_cryptolocker.exe 85 PID 1944 wrote to memory of 2168 1944 2024-02-04_a01ad8aef189854014da85ec7962d5de_cryptolocker.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-04_a01ad8aef189854014da85ec7962d5de_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-04_a01ad8aef189854014da85ec7962d5de_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1944 -
C:\Users\Admin\AppData\Local\Temp\misid.exe"C:\Users\Admin\AppData\Local\Temp\misid.exe"2⤵
- Checks computer location settings
- Executes dropped EXE
PID:2168
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
39KB
MD5d43847283cc55623264ae7125804086f
SHA1512ff584816ea18befe6f8a4f7662bd84425b6b2
SHA256daf0be17f445a97636b39b697e564d93a3577d8feed41989b4fb7cef65f05195
SHA512647cb2b793d170a491228bfe8c6714e12054da00841befe84d5b52dc4804bb2541165f61dca1c41710b84f75ed401342cc86954afe366d89b63a26370cb36531