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Analysis
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max time kernel
148s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
28/05/2024, 19:54
Behavioral task
behavioral1
Sample
2024-05-28_3e28391175b0287421323e73c378820d_cryptolocker.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-05-28_3e28391175b0287421323e73c378820d_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-28_3e28391175b0287421323e73c378820d_cryptolocker.exe
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Size
60KB
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MD5
3e28391175b0287421323e73c378820d
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SHA1
4d267da3bed5d1064beea1a464440e7d450f2371
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SHA256
f79a8177347dc8b664ee6f5f84268a95dfa4148101f1dfbb447caeb5a6183245
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SHA512
c1b7c14c25f6f9aeafffbb44d00150b8606a1a9cf293837f230d2bb91f74cfbb2863d3ac8925666e98dd40f7d88b09450bb92ec4fd87cdf225dbe95339ee9f29
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SSDEEP
768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5axK38ns:z6QFElP6n+gKmddpMOtEvwDpj9aYaQ8s
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/4740-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000600000002326f-13.dat CryptoLocker_rule2 behavioral2/memory/4740-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4432-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4432-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/4740-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000600000002326f-13.dat CryptoLocker_set1 behavioral2/memory/4740-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4432-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4432-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/4740-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000600000002326f-13.dat UPX behavioral2/memory/4740-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4432-16-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4432-27-0x0000000000500000-0x0000000000510000-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-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation 2024-05-28_3e28391175b0287421323e73c378820d_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4432 asih.exe -
resource yara_rule behavioral2/memory/4740-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000600000002326f-13.dat upx behavioral2/memory/4740-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4432-16-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4432-27-0x0000000000500000-0x0000000000510000-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 4740 wrote to memory of 4432 4740 2024-05-28_3e28391175b0287421323e73c378820d_cryptolocker.exe 82 PID 4740 wrote to memory of 4432 4740 2024-05-28_3e28391175b0287421323e73c378820d_cryptolocker.exe 82 PID 4740 wrote to memory of 4432 4740 2024-05-28_3e28391175b0287421323e73c378820d_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-28_3e28391175b0287421323e73c378820d_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-28_3e28391175b0287421323e73c378820d_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4740 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4432
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
60KB
MD5c3a72397fb9324a39a6a3108704446fd
SHA10214cda766be314fb57d372556a0fe03578b5a4f
SHA25661b8e4b413d7168e871de983b90b410602eb4f2570355d44b3f1a4314e1841c4
SHA512611627f2a1b141d685a93819195fac39ec5a8e7bf73e45eba7d6b5c97046fe98b64269d9eb59ff6a954122430a43dfeca3dc93c5c918b2bd9fadb7f6996a7989