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Analysis
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max time kernel
149s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
09/03/2024, 03:25
Behavioral task
behavioral1
Sample
2024-03-09_2abf457fc624dd3567507ba72039124b_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-03-09_2abf457fc624dd3567507ba72039124b_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-03-09_2abf457fc624dd3567507ba72039124b_cryptolocker.exe
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Size
82KB
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MD5
2abf457fc624dd3567507ba72039124b
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SHA1
dc8d7dfff0deb981ef7d529fdae976c2e646d157
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SHA256
9f77fda995e6ca13def67c74ff932a549590fe9ea2d7424353fc687b071dd672
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SHA512
0f2e1491812c585e5bc5b52fa2b2af12b4d0258132b9826bd6b6c85eee4a5a4e0b30b0924792e655500a96bc8a88d0ba269a4a57ce960a80dc7590dec57ecf30
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SSDEEP
1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOT7vS:T6a+rdOOtEvwDpjNe
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/548-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000700000001e59e-13.dat CryptoLocker_rule2 behavioral2/memory/3772-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/548-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3772-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/548-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000700000001e59e-13.dat CryptoLocker_set1 behavioral2/memory/3772-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/548-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/3772-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/548-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000700000001e59e-13.dat UPX behavioral2/memory/3772-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/548-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/3772-27-0x0000000000500000-0x0000000000510000-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-1-5-21-399997616-3400990511-967324271-1000\Control Panel\International\Geo\Nation 2024-03-09_2abf457fc624dd3567507ba72039124b_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3772 asih.exe -
resource yara_rule behavioral2/memory/548-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000700000001e59e-13.dat upx behavioral2/memory/3772-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/548-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/3772-27-0x0000000000500000-0x0000000000510000-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 548 wrote to memory of 3772 548 2024-03-09_2abf457fc624dd3567507ba72039124b_cryptolocker.exe 89 PID 548 wrote to memory of 3772 548 2024-03-09_2abf457fc624dd3567507ba72039124b_cryptolocker.exe 89 PID 548 wrote to memory of 3772 548 2024-03-09_2abf457fc624dd3567507ba72039124b_cryptolocker.exe 89
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-03-09_2abf457fc624dd3567507ba72039124b_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-03-09_2abf457fc624dd3567507ba72039124b_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:548 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:3772
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
82KB
MD55859cd53bf48fbf713b11b8c52fdea3b
SHA154292fd589c272fd91d6853c8a8c8ba182d05298
SHA25602fe446837bace3dba24b71f41612f2677ce9e74886ca2ef6571fb551f204afc
SHA51240b79ae39dc856d1093217581f1c86e6153b38a2bcd7ca742dd57dd3ff49be4cae3a4ee56a7bd7e95d62a8849768ec8e22d35f78d04f9bac7ee4b0ddffdac1e3