Analysis
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max time kernel
88s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20231222-en -
resource tags
arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system -
submitted
25-01-2024 17:25
Behavioral task
behavioral1
Sample
2024-01-25_3601743a62cb2f29362aa8ee21b709af_cryptolocker.exe
Resource
win7-20231215-en
General
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Target
2024-01-25_3601743a62cb2f29362aa8ee21b709af_cryptolocker.exe
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Size
56KB
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MD5
3601743a62cb2f29362aa8ee21b709af
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SHA1
893c52a3d227da4c073430a35a8a166581377c83
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SHA256
7f7c6608c1043e434d8074fe8f791deb5f348403855c7a225efc806eb6b9dbb7
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SHA512
7f6753905d9ef43a41d4eca13128af49ed6dcc608124dacc8c221e07cfc80e88074394205218787bcb39818858f59ee60be0f5f8daed1620a0f306cec0631590
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SSDEEP
768:zQz7yVEhs9+syJP6ntOOtEvwDpjFeV0ZOfcpLzbO:zj+soPSMOtEvwDpj4yzbO
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/1356-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000900000002313b-13.dat CryptoLocker_rule2 behavioral2/memory/1868-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1356-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1868-55-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/1356-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000900000002313b-13.dat CryptoLocker_set1 behavioral2/memory/1868-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/1356-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/1868-55-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/1356-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000900000002313b-13.dat UPX behavioral2/memory/1868-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/1356-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/1868-55-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation misid.exe Key value queried \REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation 2024-01-25_3601743a62cb2f29362aa8ee21b709af_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 1868 misid.exe -
resource yara_rule behavioral2/memory/1356-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000900000002313b-13.dat upx behavioral2/memory/1868-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/1356-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/1868-55-0x0000000000500000-0x0000000000510000-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 1356 wrote to memory of 1868 1356 2024-01-25_3601743a62cb2f29362aa8ee21b709af_cryptolocker.exe 88 PID 1356 wrote to memory of 1868 1356 2024-01-25_3601743a62cb2f29362aa8ee21b709af_cryptolocker.exe 88 PID 1356 wrote to memory of 1868 1356 2024-01-25_3601743a62cb2f29362aa8ee21b709af_cryptolocker.exe 88
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-01-25_3601743a62cb2f29362aa8ee21b709af_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-01-25_3601743a62cb2f29362aa8ee21b709af_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1356 -
C:\Users\Admin\AppData\Local\Temp\misid.exe"C:\Users\Admin\AppData\Local\Temp\misid.exe"2⤵
- Checks computer location settings
- Executes dropped EXE
PID:1868
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
56KB
MD59317a757d0fcc278f6fb769a99ce4096
SHA113f170b55d577907b2094cf69fbbede79d5337bd
SHA2563fae64f1375d9944730e841a61bd003890556d9e889a870e743cf7f62d71803f
SHA5124c96e25e400c28426eb5d18713b4e20a00eb1690dd15e34b5aa84e85a01e7028812954809d96aae1f4098ab3e49d1c128397cd42343a7d85ae0c319a59d81fe1