Analysis
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max time kernel
150s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240419-en -
resource tags
arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system -
submitted
28/04/2024, 19:36
Behavioral task
behavioral1
Sample
2024-04-28_f9d3df8914f41148ee8ab42df2d18c69_cryptolocker.exe
Resource
win7-20240220-en
Behavioral task
behavioral2
Sample
2024-04-28_f9d3df8914f41148ee8ab42df2d18c69_cryptolocker.exe
Resource
win10v2004-20240419-en
General
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Target
2024-04-28_f9d3df8914f41148ee8ab42df2d18c69_cryptolocker.exe
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Size
70KB
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MD5
f9d3df8914f41148ee8ab42df2d18c69
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SHA1
a600e2f2dce6783936a8fe12cd4ec0c2efa31625
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SHA256
85632830ed80920b73cdfe69ad433388c2f3e0e61700ab344a9347ad3e2caf19
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SHA512
6cb49e5ec53f391388eb5e6677caf57c0c3c82ab0ddc09e59c0bdbeda506f0cd3e9a0a19d2baee829417558ead0216c288eb76d13df5a3bff39de4a93b21364c
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SSDEEP
1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs9g:C4Q2c94OtEvwDpj4H8zx
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/4728-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000d000000023b63-13.dat CryptoLocker_rule2 behavioral2/memory/5044-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4728-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/5044-28-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 3 IoCs
resource yara_rule behavioral2/memory/4728-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4728-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/5044-28-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/4728-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000d000000023b63-13.dat UPX behavioral2/memory/5044-19-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4728-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/5044-28-0x0000000000500000-0x0000000000510000-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-1-5-21-2860750803-256193626-1801997576-1000\Control Panel\International\Geo\Nation 2024-04-28_f9d3df8914f41148ee8ab42df2d18c69_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 5044 misid.exe -
resource yara_rule behavioral2/memory/4728-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000d000000023b63-13.dat upx behavioral2/memory/5044-19-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4728-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/5044-28-0x0000000000500000-0x0000000000510000-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 4728 wrote to memory of 5044 4728 2024-04-28_f9d3df8914f41148ee8ab42df2d18c69_cryptolocker.exe 84 PID 4728 wrote to memory of 5044 4728 2024-04-28_f9d3df8914f41148ee8ab42df2d18c69_cryptolocker.exe 84 PID 4728 wrote to memory of 5044 4728 2024-04-28_f9d3df8914f41148ee8ab42df2d18c69_cryptolocker.exe 84
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-28_f9d3df8914f41148ee8ab42df2d18c69_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-28_f9d3df8914f41148ee8ab42df2d18c69_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4728 -
C:\Users\Admin\AppData\Local\Temp\misid.exe"C:\Users\Admin\AppData\Local\Temp\misid.exe"2⤵
- Executes dropped EXE
PID:5044
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
70KB
MD5d5f9b570223ef78d8c75eee8b3de4c3c
SHA17b17e5a4328852d493bc2a596efc82feffcb6b43
SHA2567a319aad862e5db32bb03128f0319ef4e0538467040ddbc8b8ac07565f230fa3
SHA5128d70ab7c14989bdafe7fad4df3bcb0246f17d38eda30aa03cae7940fe508f48884a3be44133c5876594c7c439432646750fe87df4abccccb24b385c4aabc2087