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Analysis
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max time kernel
148s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
01/06/2024, 15:51
Behavioral task
behavioral1
Sample
2024-06-01_ed2b6e3c93dee7a901cbfb624f25f64e_cryptolocker.exe
Resource
win7-20240419-en
Behavioral task
behavioral2
Sample
2024-06-01_ed2b6e3c93dee7a901cbfb624f25f64e_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-01_ed2b6e3c93dee7a901cbfb624f25f64e_cryptolocker.exe
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Size
91KB
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MD5
ed2b6e3c93dee7a901cbfb624f25f64e
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SHA1
818cd96cce825f0a80e9f7f6909ec3dab71aa01a
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SHA256
a61e5b86c643de908b0034e01fe2f2a96880cc37726e63e76ea8c3b0a8e4f16e
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SHA512
4d5742cf8cb4b1fefe8f6a0fc84f4a6c7b8d2de8b3ecb978b3ebbbfcab41658db5c66eeb759b6a9373ef6c69d2fd02a4389193815590ef6cc2c91e171ae71eb5
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SSDEEP
1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgIiY:AnBdOOtEvwDpj6zi
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/3100-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x00070000000232a4-13.dat CryptoLocker_rule2 behavioral2/memory/3100-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1392-18-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1392-27-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/3100-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/files/0x00070000000232a4-13.dat CryptoLocker_set1 behavioral2/memory/3100-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/1392-18-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/1392-27-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/3100-0-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/files/0x00070000000232a4-13.dat UPX behavioral2/memory/3100-17-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/memory/1392-18-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/memory/1392-27-0x0000000000500000-0x000000000050F000-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-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation 2024-06-01_ed2b6e3c93dee7a901cbfb624f25f64e_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 1392 asih.exe -
resource yara_rule behavioral2/memory/3100-0-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/files/0x00070000000232a4-13.dat upx behavioral2/memory/3100-17-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/memory/1392-18-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/memory/1392-27-0x0000000000500000-0x000000000050F000-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 3100 wrote to memory of 1392 3100 2024-06-01_ed2b6e3c93dee7a901cbfb624f25f64e_cryptolocker.exe 82 PID 3100 wrote to memory of 1392 3100 2024-06-01_ed2b6e3c93dee7a901cbfb624f25f64e_cryptolocker.exe 82 PID 3100 wrote to memory of 1392 3100 2024-06-01_ed2b6e3c93dee7a901cbfb624f25f64e_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-01_ed2b6e3c93dee7a901cbfb624f25f64e_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-01_ed2b6e3c93dee7a901cbfb624f25f64e_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3100 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:1392
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
91KB
MD56f1f49575275014ca7cf067a2103ab4a
SHA134dd4c8244ec6732bf17370131acc768dafa0a97
SHA2564a116ad39ef334212409951d17116c2d71a24fae0e255a5ab1b31bd94fe775f9
SHA512592cc38e27ceaf81a60d7925718ff7150f1a08ff137d320c174decce29a9c83a0638ed56d9700c9fdbe75a39f7242a3bc86063802512622f7994f5036c713062