Analysis
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max time kernel
150s -
max time network
147s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
25-01-2024 17:44
Static task
static1
Behavioral task
behavioral1
Sample
2024-01-25_259f9b58e5f27071472b5909427585c5_cryptolocker.exe
Resource
win7-20231215-en
General
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Target
2024-01-25_259f9b58e5f27071472b5909427585c5_cryptolocker.exe
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Size
32KB
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MD5
259f9b58e5f27071472b5909427585c5
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SHA1
b4da42c7aabb032efc1cec19394eb8c5b370f37e
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SHA256
6be70c12a7a0879e1fc176a0fbd425847989a291ab61dc1ddce0d731ec46e309
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SHA512
7079291937b07ca5f54c1222e4f1ebd33e6ec0ec28985c3257947c6e3e235ecea8c4ea082d8626b890de4908b99aeaf72894e7ae0a8a86b0e79da5b16ad00a53
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SSDEEP
384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6A0X/Xd:b/yC4GyNM01GuQMNXw2PSjH+PN
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
Processes:
resource yara_rule C:\Users\Admin\AppData\Local\Temp\retln.exe CryptoLocker_rule2 -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
2024-01-25_259f9b58e5f27071472b5909427585c5_cryptolocker.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-1232405761-1209240240-3206092754-1000\Control Panel\International\Geo\Nation 2024-01-25_259f9b58e5f27071472b5909427585c5_cryptolocker.exe -
Executes dropped EXE 1 IoCs
Processes:
retln.exepid process 2068 retln.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
Processes:
2024-01-25_259f9b58e5f27071472b5909427585c5_cryptolocker.exedescription pid process target process PID 432 wrote to memory of 2068 432 2024-01-25_259f9b58e5f27071472b5909427585c5_cryptolocker.exe retln.exe PID 432 wrote to memory of 2068 432 2024-01-25_259f9b58e5f27071472b5909427585c5_cryptolocker.exe retln.exe PID 432 wrote to memory of 2068 432 2024-01-25_259f9b58e5f27071472b5909427585c5_cryptolocker.exe retln.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-01-25_259f9b58e5f27071472b5909427585c5_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-01-25_259f9b58e5f27071472b5909427585c5_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:432 -
C:\Users\Admin\AppData\Local\Temp\retln.exe"C:\Users\Admin\AppData\Local\Temp\retln.exe"2⤵
- Executes dropped EXE
PID:2068
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
32KB
MD51e03ae0437c4513a3b47918ab5776e0b
SHA10f1e86100d331039b61dc60d724a643b6897bc31
SHA2569d1c947c419f5526bde951216608ef898e02492696146f5e2e33dd7ab26df1a5
SHA5125c2856c89aec01e9e508e5a045eaf4f2cd3d335aa8c0aef530afdcca30d351b02fb15a4831321bf55ab853970f671ce607177a78e6143b5690a505a7da1cb511