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Analysis
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max time kernel
150s -
max time network
156s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
18/03/2024, 10:50
Static task
static1
Behavioral task
behavioral1
Sample
2024-03-18_d3fcaa0be72afd8ea62ef2e471bacc15_cryptolocker.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-03-18_d3fcaa0be72afd8ea62ef2e471bacc15_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-03-18_d3fcaa0be72afd8ea62ef2e471bacc15_cryptolocker.exe
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Size
69KB
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MD5
d3fcaa0be72afd8ea62ef2e471bacc15
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SHA1
2e3d40a85ada946b8bd3ca493e7a5b1d39126c3c
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SHA256
b025a2d3258c240146067c21275522efb33aa87a1aa6c08ef72ab3730f24d409
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SHA512
3ff6bf9a2acc680bcb3c6a455d072356b62371c677bf00f67916ab30d2cf8bf2d9decc6e3aff210cd05c9c5fca1bc23de85292e42f06563adcefb3db6b0b30ca
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SSDEEP
1536:Dk/xY0sllyGQMOtEvwDpjwycDtKkQZQRKb61vSbgZ3QzNKUrg:DW60sllyWOtEvwDpjwF85+
Malware Config
Signatures
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Detection of CryptoLocker Variants 3 IoCs
resource yara_rule behavioral2/memory/2400-0-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0008000000022745-13.dat CryptoLocker_rule2 behavioral2/memory/2400-18-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 3 IoCs
resource yara_rule behavioral2/memory/2400-0-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_set1 behavioral2/files/0x0008000000022745-13.dat CryptoLocker_set1 behavioral2/memory/2400-18-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_set1 -
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-1-5-21-3045580317-3728985860-206385570-1000\Control Panel\International\Geo\Nation 2024-03-18_d3fcaa0be72afd8ea62ef2e471bacc15_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3356 asih.exe -
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 2400 wrote to memory of 3356 2400 2024-03-18_d3fcaa0be72afd8ea62ef2e471bacc15_cryptolocker.exe 90 PID 2400 wrote to memory of 3356 2400 2024-03-18_d3fcaa0be72afd8ea62ef2e471bacc15_cryptolocker.exe 90 PID 2400 wrote to memory of 3356 2400 2024-03-18_d3fcaa0be72afd8ea62ef2e471bacc15_cryptolocker.exe 90
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-03-18_d3fcaa0be72afd8ea62ef2e471bacc15_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-03-18_d3fcaa0be72afd8ea62ef2e471bacc15_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2400 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:3356
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
69KB
MD5efd264cdd8d34fd0f58f3955726a4cc1
SHA1fc8c41e80953d60836e57b9d45386d4d3e838c00
SHA256a21e100bc98183783945777553ca06033925732e95c62005c93824640628a42b
SHA512f0c862436e2113daa64cedbbbb029bb468c273f2fba8e5bae495aa843a6b77c840b6229621b4d749a4968f72a8ac29bb53bd083572e1039e78eec20d5ae70116