Analysis
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max time kernel
150s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
11/06/2024, 00:51
Behavioral task
behavioral1
Sample
2024-06-11_2d060220f63307eebdf390edaf32f996_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-11_2d060220f63307eebdf390edaf32f996_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-11_2d060220f63307eebdf390edaf32f996_cryptolocker.exe
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Size
61KB
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MD5
2d060220f63307eebdf390edaf32f996
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SHA1
89a51ba075ddcb8ae3eaf649f99053d8c5ca631f
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SHA256
fc888caaeb4c359d4b6c39cec91572d84f36cc568818ec30861cf8c3d68a2997
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SHA512
3330b1724a52a16b1a67fb59dbf09ec52285e86ff97861ab0de3d139df0cbc9939847667139156a3cb4c89a4ab64da5e9e3152ae672d76e47f0979b559f1b994
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SSDEEP
768:H6LsoEEeegiZPvEhHSG+gk5NQXtckstOOtEvwDpjhBaD3TUogs/VXpAP6pd3k:H6QFElP6n+gou9cvMOtEvwDpjCpVXz3k
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/3112-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0008000000022f51-13.dat CryptoLocker_rule2 behavioral2/memory/5036-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3112-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/5036-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/3112-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x0008000000022f51-13.dat CryptoLocker_set1 behavioral2/memory/5036-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/3112-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/5036-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/3112-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x0008000000022f51-13.dat UPX behavioral2/memory/5036-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/3112-19-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/5036-27-0x0000000000500000-0x0000000000510000-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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation 2024-06-11_2d060220f63307eebdf390edaf32f996_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 5036 asih.exe -
resource yara_rule behavioral2/memory/3112-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x0008000000022f51-13.dat upx behavioral2/memory/5036-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/3112-19-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/5036-27-0x0000000000500000-0x0000000000510000-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 3112 wrote to memory of 5036 3112 2024-06-11_2d060220f63307eebdf390edaf32f996_cryptolocker.exe 83 PID 3112 wrote to memory of 5036 3112 2024-06-11_2d060220f63307eebdf390edaf32f996_cryptolocker.exe 83 PID 3112 wrote to memory of 5036 3112 2024-06-11_2d060220f63307eebdf390edaf32f996_cryptolocker.exe 83
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-11_2d060220f63307eebdf390edaf32f996_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-11_2d060220f63307eebdf390edaf32f996_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3112 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:5036
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
61KB
MD53fe42829574a832714b5872a18b02334
SHA131afdc581c749256a4fb2929b31df7f20baa9d03
SHA2566a5012754b4f2b50b264633180b5f3fa520b9a7df891b0a87a884dc43e8a7d4a
SHA51201c14289db6f6bbc130209de23fe56570aae2438703e623d3758f63ef1177b3a89962336a97eab0bbd334ea926ce791e9f9f54c0035074a96b4cf4a1182784b9