Analysis
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max time kernel
142s -
max time network
150s -
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 17:54
Static task
static1
Behavioral task
behavioral1
Sample
2024-01-25_7521e3e9f6ad6fa66906b4d0d50b96a1_cryptolocker.exe
Resource
win7-20231215-en
General
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Target
2024-01-25_7521e3e9f6ad6fa66906b4d0d50b96a1_cryptolocker.exe
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Size
121KB
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MD5
7521e3e9f6ad6fa66906b4d0d50b96a1
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SHA1
54ce844fc1252235bdb036c40883c27d2b34b4c0
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SHA256
a073fb995b995e8ebc9a1756c2e28b14d6042b45e9bfabccd4f0f9ed37616580
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SHA512
19fc1057a16bc7ceceda9eebdbfb4fdb339e7a3012fc9c7c6722c1baa5b9c8c4b223f22be78bfd6bb7d0b0004d6ade7a610996036d9091dddefd6f8782580a54
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SSDEEP
768:gUQz7yVEhs9+4T/1bytOOtEvwDpjNbZ7uyA36S7MpxRIIXVe3mU9TYwlOBTK0:gUj+AIMOtEvwDpjNbwQEIPlemUhYa0
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
Processes:
resource yara_rule C:\Users\Admin\AppData\Local\Temp\misid.exe CryptoLocker_rule2 -
Detection of Cryptolocker Samples 1 IoCs
Processes:
resource yara_rule C:\Users\Admin\AppData\Local\Temp\misid.exe CryptoLocker_set1 -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
2024-01-25_7521e3e9f6ad6fa66906b4d0d50b96a1_cryptolocker.exemisid.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-996941297-2279405024-2328152752-1000\Control Panel\International\Geo\Nation 2024-01-25_7521e3e9f6ad6fa66906b4d0d50b96a1_cryptolocker.exe Key value queried \REGISTRY\USER\S-1-5-21-996941297-2279405024-2328152752-1000\Control Panel\International\Geo\Nation misid.exe -
Executes dropped EXE 1 IoCs
Processes:
misid.exepid process 4332 misid.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_7521e3e9f6ad6fa66906b4d0d50b96a1_cryptolocker.exedescription pid process target process PID 5004 wrote to memory of 4332 5004 2024-01-25_7521e3e9f6ad6fa66906b4d0d50b96a1_cryptolocker.exe misid.exe PID 5004 wrote to memory of 4332 5004 2024-01-25_7521e3e9f6ad6fa66906b4d0d50b96a1_cryptolocker.exe misid.exe PID 5004 wrote to memory of 4332 5004 2024-01-25_7521e3e9f6ad6fa66906b4d0d50b96a1_cryptolocker.exe misid.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-01-25_7521e3e9f6ad6fa66906b4d0d50b96a1_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-01-25_7521e3e9f6ad6fa66906b4d0d50b96a1_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5004 -
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:4332
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
121KB
MD5df24eee5830432ff83638d6af46f23e0
SHA1e3249dd7ad9fa934dde5d23c5926c4dd8fb9dfd1
SHA2567ac7fc45d0c4ca8eb1dca7b9a754bf630e825a9dec7113244ed29efdec715513
SHA512444b0aff58d1cf2369bd743f019953b62b48408aeb3913155d8621b454c77f543242d58e365a926581ba98e2721b8fd840ad42373046e5836f3433b5dd679f30