Analysis
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max time kernel
150s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
29/02/2024, 01:51
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-29_bef55fce1acb2eea06f66656795b4006_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-02-29_bef55fce1acb2eea06f66656795b4006_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-02-29_bef55fce1acb2eea06f66656795b4006_cryptolocker.exe
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Size
68KB
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MD5
bef55fce1acb2eea06f66656795b4006
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SHA1
6019343f86127e7571406d337a594a127a46191b
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SHA256
1ccf5ca34e65d196345c64823298f73617d6da77222eecd3a528fe908b010ffe
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SHA512
98acd8639d56531feee1c38e76b6b74279f9d6001af24cd7ca2b522f6818f32baf85dc11f915e4138c2ac4a0016a8009a87a9a22b5282bc795f6bfda034024ab
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SSDEEP
1536:Dk/xY0sllyGQMOtEvwDpjwycDtKkQZQRKb61vSbgZ3QzNKUx:DW60sllyWOtEvwDpjwF85/
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/1544-0-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0009000000023040-13.dat CryptoLocker_rule2 behavioral2/memory/1544-17-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2136-18-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/1544-0-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_set1 behavioral2/files/0x0009000000023040-13.dat CryptoLocker_set1 behavioral2/memory/1544-17-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_set1 behavioral2/memory/2136-18-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_set1 -
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-1-5-21-3270530367-132075249-2153716227-1000\Control Panel\International\Geo\Nation 2024-02-29_bef55fce1acb2eea06f66656795b4006_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2136 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
description pid Process procid_target PID 1544 wrote to memory of 2136 1544 2024-02-29_bef55fce1acb2eea06f66656795b4006_cryptolocker.exe 90 PID 1544 wrote to memory of 2136 1544 2024-02-29_bef55fce1acb2eea06f66656795b4006_cryptolocker.exe 90 PID 1544 wrote to memory of 2136 1544 2024-02-29_bef55fce1acb2eea06f66656795b4006_cryptolocker.exe 90
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-29_bef55fce1acb2eea06f66656795b4006_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-29_bef55fce1acb2eea06f66656795b4006_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1544 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2136
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
68KB
MD5810143f49139794e670361ca5f1910b3
SHA1932053a2e103240752fc0fba4904cd888a14c856
SHA2569ee7bfd0c409aae92fa6fcf4e4025129b8f3d993a4ca2ece01e6c03be34358d2
SHA512c57f67be98374ca5794497f0a4cc1f2d02ee2fed69ab4462d7e393957534eef1a747554d48661f0bf853d26edff795e875eb9fdeae33c279c3c55728c3010528