Analysis
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max time kernel
148s -
max time network
156s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
23-05-2024 18:20
Behavioral task
behavioral1
Sample
2024-05-23_d708c42c2ef0b943ff23050fe2631c3e_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-23_d708c42c2ef0b943ff23050fe2631c3e_cryptolocker.exe
Resource
win10v2004-20240426-en
General
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Target
2024-05-23_d708c42c2ef0b943ff23050fe2631c3e_cryptolocker.exe
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Size
89KB
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MD5
d708c42c2ef0b943ff23050fe2631c3e
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SHA1
f30286ada57814de0740d932902a818cb5ec7468
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SHA256
9b77f1087c9a0fcf97a53bc9c8d623e91ea391db201164524d6c08dbfb1f0d3e
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SHA512
96929285fc2190b3ce6d139bb1c4735825972bbf0c31af44d2afd259d830753e395a1b55b6dde8092af871f63f8d5ea48792ab79fab12868ed77a62ac8a85995
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SSDEEP
768:qkmnjFom/kLyMro2GtOOtEvwDpjeY10Y/YMsvlMdwPK80GQuchoIgtIODh:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgP
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
Processes:
resource yara_rule behavioral2/memory/3800-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_rule2 behavioral2/memory/3800-18-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2592-27-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
Processes:
resource yara_rule behavioral2/memory/3800-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_set1 behavioral2/memory/3800-18-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/2592-27-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
Processes:
resource yara_rule behavioral2/memory/3800-0-0x0000000000500000-0x000000000050F000-memory.dmp UPX C:\Users\Admin\AppData\Local\Temp\asih.exe UPX behavioral2/memory/3800-18-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/memory/2592-27-0x0000000000500000-0x000000000050F000-memory.dmp UPX -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
2024-05-23_d708c42c2ef0b943ff23050fe2631c3e_cryptolocker.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation 2024-05-23_d708c42c2ef0b943ff23050fe2631c3e_cryptolocker.exe -
Executes dropped EXE 1 IoCs
Processes:
asih.exepid process 2592 asih.exe -
Processes:
resource yara_rule behavioral2/memory/3800-0-0x0000000000500000-0x000000000050F000-memory.dmp upx C:\Users\Admin\AppData\Local\Temp\asih.exe upx behavioral2/memory/3800-18-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/memory/2592-27-0x0000000000500000-0x000000000050F000-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
Processes:
2024-05-23_d708c42c2ef0b943ff23050fe2631c3e_cryptolocker.exedescription pid process target process PID 3800 wrote to memory of 2592 3800 2024-05-23_d708c42c2ef0b943ff23050fe2631c3e_cryptolocker.exe asih.exe PID 3800 wrote to memory of 2592 3800 2024-05-23_d708c42c2ef0b943ff23050fe2631c3e_cryptolocker.exe asih.exe PID 3800 wrote to memory of 2592 3800 2024-05-23_d708c42c2ef0b943ff23050fe2631c3e_cryptolocker.exe asih.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-23_d708c42c2ef0b943ff23050fe2631c3e_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-23_d708c42c2ef0b943ff23050fe2631c3e_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\asih.exeFilesize
89KB
MD5dad5c2351a0145d2c976fd3353df5b50
SHA12af0536ae8fcd75150b224e6ea5efa48b00c3612
SHA256c5c212fa98b54482b5dcf7291c94358b0133ee080c0e73d10d7cb00311fcd5ca
SHA512785724a2cd762b09b607adfeb37afd49513f541240184293cac91921b89d7a780410a91ae9a782a28cfd87e9d0cffb7b69ec26edf88ff28935c705976f24ef39
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memory/2592-26-0x00000000005A0000-0x00000000005A6000-memory.dmpFilesize
24KB
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memory/2592-20-0x00000000006C0000-0x00000000006C6000-memory.dmpFilesize
24KB
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memory/2592-27-0x0000000000500000-0x000000000050F000-memory.dmpFilesize
60KB
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memory/3800-0-0x0000000000500000-0x000000000050F000-memory.dmpFilesize
60KB
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memory/3800-1-0x0000000000620000-0x0000000000626000-memory.dmpFilesize
24KB
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memory/3800-2-0x0000000000750000-0x0000000000756000-memory.dmpFilesize
24KB
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memory/3800-9-0x0000000000620000-0x0000000000626000-memory.dmpFilesize
24KB
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memory/3800-18-0x0000000000500000-0x000000000050F000-memory.dmpFilesize
60KB