Analysis
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max time kernel
148s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
09-05-2024 18:58
Behavioral task
behavioral1
Sample
2024-05-09_ff5de014c8961740b338cc6b3c2c102d_cryptolocker.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-05-09_ff5de014c8961740b338cc6b3c2c102d_cryptolocker.exe
Resource
win10v2004-20240426-en
General
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Target
2024-05-09_ff5de014c8961740b338cc6b3c2c102d_cryptolocker.exe
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Size
73KB
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MD5
ff5de014c8961740b338cc6b3c2c102d
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SHA1
78ce5a7217aac3ccce9c8a84c9e1a4a5538111f4
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SHA256
49d5333065d8f9baec4bf5f96c1423ab320745b5e87bfeffda981ce4e74cea87
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SHA512
2675a4e661915e44287dc8122703904efd015b62fbe2fb8a252840df7ab46b4db1571583c8193978ad59ac23b4e91bc87b2369d7100dbfd11e44ed550549e18f
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SSDEEP
1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalVJ:1nK6a+qdOOtEvwDpj2
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/2260-0-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0007000000023305-13.dat CryptoLocker_rule2 behavioral2/memory/2260-18-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 behavioral2/memory/2600-17-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 behavioral2/memory/2600-27-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/2260-0-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 behavioral2/files/0x0007000000023305-13.dat CryptoLocker_set1 behavioral2/memory/2260-18-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 behavioral2/memory/2600-17-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 behavioral2/memory/2600-27-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/2260-0-0x0000000000500000-0x000000000050F311-memory.dmp UPX behavioral2/files/0x0007000000023305-13.dat UPX behavioral2/memory/2260-18-0x0000000000500000-0x000000000050F311-memory.dmp UPX behavioral2/memory/2600-17-0x0000000000500000-0x000000000050F311-memory.dmp UPX behavioral2/memory/2600-27-0x0000000000500000-0x000000000050F311-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-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation 2024-05-09_ff5de014c8961740b338cc6b3c2c102d_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2600 asih.exe -
resource yara_rule behavioral2/memory/2260-0-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral2/files/0x0007000000023305-13.dat upx behavioral2/memory/2260-18-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral2/memory/2600-17-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral2/memory/2600-27-0x0000000000500000-0x000000000050F311-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 2260 wrote to memory of 2600 2260 2024-05-09_ff5de014c8961740b338cc6b3c2c102d_cryptolocker.exe 83 PID 2260 wrote to memory of 2600 2260 2024-05-09_ff5de014c8961740b338cc6b3c2c102d_cryptolocker.exe 83 PID 2260 wrote to memory of 2600 2260 2024-05-09_ff5de014c8961740b338cc6b3c2c102d_cryptolocker.exe 83
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-09_ff5de014c8961740b338cc6b3c2c102d_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-09_ff5de014c8961740b338cc6b3c2c102d_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2260 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2600
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
73KB
MD5ea2391f7a7757a4ab06cf89dd778c7e2
SHA14ea5e7ba281d3eb0f8c3b0b2a4dd573b4549242c
SHA256a85617c6d8e15795c4bc1d581853881bd99495955d1e4d62bfb0e1dc5230cb02
SHA512df99b3d783a04551456227dc9bbcea5c75bcfcacd7fafedf954f35daf196b4c41b065d69740249a400194a3ee555e695ddbccfdf3c9f9e6f85ea59edd791eb3c