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Analysis
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max time kernel
150s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240419-en -
resource tags
arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system -
submitted
28/04/2024, 14:23
Behavioral task
behavioral1
Sample
2024-04-28_059593ed6dc6d1f598d6391f47fb327b_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-28_059593ed6dc6d1f598d6391f47fb327b_cryptolocker.exe
Resource
win10v2004-20240419-en
General
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Target
2024-04-28_059593ed6dc6d1f598d6391f47fb327b_cryptolocker.exe
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Size
76KB
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MD5
059593ed6dc6d1f598d6391f47fb327b
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SHA1
a24204f4039311ab81d7efac05cc6d81c3170a40
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SHA256
06dea97ed9e1711c1745b2191e9f6ee0b651441cc82110aafd32bd60736af6fa
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SHA512
ee99ac9bd907cade624b616dfea1921170c81c6c954611366fca57b1ba8e9164098f83a71087b04a6761cf05d6dd481e24d5b1f1bddc250f1fb479944a1dbe44
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SSDEEP
1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdxPUx5:T6a+rdOOtEvwDpjNtHP6
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/2984-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000c000000023b59-13.dat CryptoLocker_rule2 behavioral2/memory/4880-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2984-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4880-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/2984-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000c000000023b59-13.dat CryptoLocker_set1 behavioral2/memory/4880-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/2984-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4880-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/2984-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000c000000023b59-13.dat UPX behavioral2/memory/4880-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/2984-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4880-27-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
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-1-5-21-2860750803-256193626-1801997576-1000\Control Panel\International\Geo\Nation 2024-04-28_059593ed6dc6d1f598d6391f47fb327b_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4880 asih.exe -
resource yara_rule behavioral2/memory/2984-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000c000000023b59-13.dat upx behavioral2/memory/4880-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/2984-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4880-27-0x0000000000500000-0x0000000000510000-memory.dmp upx -
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 2984 wrote to memory of 4880 2984 2024-04-28_059593ed6dc6d1f598d6391f47fb327b_cryptolocker.exe 84 PID 2984 wrote to memory of 4880 2984 2024-04-28_059593ed6dc6d1f598d6391f47fb327b_cryptolocker.exe 84 PID 2984 wrote to memory of 4880 2984 2024-04-28_059593ed6dc6d1f598d6391f47fb327b_cryptolocker.exe 84
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-28_059593ed6dc6d1f598d6391f47fb327b_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-28_059593ed6dc6d1f598d6391f47fb327b_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2984 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4880
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
77KB
MD5711a79931d4f2ef3b23a8c8b4e5f3c91
SHA1cb07e9e218d7247f9ba624d88116211a0649aa61
SHA256efce3a3c967d59285b9c1f5d99fd802414173db6805b27191e9c71dcb917bed9
SHA5129cc648453041eb71587bb4b5da3a3edcaf0bf27065a2294d189438a06a62e458427377a849d4e8e1966c476800a21e21f7438ba5445597ac1e6b668d68018ff0