Analysis
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max time kernel
148s -
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 15:52
Static task
static1
Behavioral task
behavioral1
Sample
2024-01-25_df53780ac07f6b46677077c06253f744_cryptolocker.exe
Resource
win7-20231215-en
General
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Target
2024-01-25_df53780ac07f6b46677077c06253f744_cryptolocker.exe
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Size
37KB
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MD5
df53780ac07f6b46677077c06253f744
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SHA1
b408757a174615381ada8c4046fcc99ef175a09b
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SHA256
11e26bfbf08684897cebed3e3c094c9abcccdcaa9361cccdaca4783ddc0c0077
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SHA512
8f7e6b142fe790602a1cef8125afd8b291f070999a19c8096b8e88820dd3f811748a43c7032df62cfcac0048e17f7b16a26436c7c212c3c614cfdebab9153c17
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SSDEEP
768:X6LsoEEeegiZPvEhHSG+gp/QtOOtEvwDpjBaac4HKcf7:X6QFElP6n+gJQMOtEvwDpjBsYK67
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
Processes:
resource yara_rule C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_rule2 -
Detection of Cryptolocker Samples 1 IoCs
Processes:
resource yara_rule C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_set1 -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
2024-01-25_df53780ac07f6b46677077c06253f744_cryptolocker.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-768304381-2824894965-3840216961-1000\Control Panel\International\Geo\Nation 2024-01-25_df53780ac07f6b46677077c06253f744_cryptolocker.exe -
Executes dropped EXE 1 IoCs
Processes:
asih.exepid process 1768 asih.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_df53780ac07f6b46677077c06253f744_cryptolocker.exedescription pid process target process PID 4552 wrote to memory of 1768 4552 2024-01-25_df53780ac07f6b46677077c06253f744_cryptolocker.exe asih.exe PID 4552 wrote to memory of 1768 4552 2024-01-25_df53780ac07f6b46677077c06253f744_cryptolocker.exe asih.exe PID 4552 wrote to memory of 1768 4552 2024-01-25_df53780ac07f6b46677077c06253f744_cryptolocker.exe asih.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-01-25_df53780ac07f6b46677077c06253f744_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-01-25_df53780ac07f6b46677077c06253f744_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4552 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:1768
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\asih.exeFilesize
37KB
MD5c12863e8c5ef52d956c8ede6f1321b7b
SHA11516e348e16bf1891df54f84915506fec3624988
SHA256a190025b8cd0ecfb532bbfaa0f4111db716e30997ef3c2de53e7d37e8b99bf9a
SHA512d4351124609f4db5cd57dd039f2eeedc6297becc8406000ca3a0c0d6b45b46ad26619cf8689c17f4c0b6c1179c196fbe58db60527b0249ac55b45cb565dea238
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memory/1768-17-0x0000000001F70000-0x0000000001F76000-memory.dmpFilesize
24KB
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memory/1768-19-0x0000000001F50000-0x0000000001F56000-memory.dmpFilesize
24KB
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memory/4552-2-0x0000000000600000-0x0000000000606000-memory.dmpFilesize
24KB
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memory/4552-1-0x00000000005E0000-0x00000000005E6000-memory.dmpFilesize
24KB
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memory/4552-0-0x00000000005E0000-0x00000000005E6000-memory.dmpFilesize
24KB