Analysis
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max time kernel
144s -
max time network
148s -
platform
windows10-2004_x64 -
resource
win10v2004-20240221-en -
resource tags
arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system -
submitted
21/02/2024, 14:42
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-21_7e6e384f14e83024e37d0a99e4cfbd65_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-21_7e6e384f14e83024e37d0a99e4cfbd65_cryptolocker.exe
Resource
win10v2004-20240221-en
General
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Target
2024-02-21_7e6e384f14e83024e37d0a99e4cfbd65_cryptolocker.exe
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Size
60KB
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MD5
7e6e384f14e83024e37d0a99e4cfbd65
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SHA1
45496cb518f0f6804e01359106e676cee2482ea4
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SHA256
9951aff5b44efb3850fee578e8d6dbc6637ed49512655066713f016de2fe10c2
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SHA512
3497982f9cd0e24a2f26795b830a4c01eb9b9b842a850870bd8f7791b4d1f79f83c7714e5335b3a0976adeea93437a59445e0d7b0e060263c6290b58af227748
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SSDEEP
1536:btB9g/xtCSKfxLIc//Xr+/AO/kIZ3ft2nVuTKB6nggOlHdUHNi:btng54SMLr+/AO/kIhfoKMHdl
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x000700000002312d-12.dat CryptoLocker_rule2 -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-3844919115-497234255-166257750-1000\Control Panel\International\Geo\Nation 2024-02-21_7e6e384f14e83024e37d0a99e4cfbd65_cryptolocker.exe Key value queried \REGISTRY\USER\S-1-5-21-3844919115-497234255-166257750-1000\Control Panel\International\Geo\Nation gewos.exe -
Executes dropped EXE 1 IoCs
pid Process 2864 gewos.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 2832 wrote to memory of 2864 2832 2024-02-21_7e6e384f14e83024e37d0a99e4cfbd65_cryptolocker.exe 81 PID 2832 wrote to memory of 2864 2832 2024-02-21_7e6e384f14e83024e37d0a99e4cfbd65_cryptolocker.exe 81 PID 2832 wrote to memory of 2864 2832 2024-02-21_7e6e384f14e83024e37d0a99e4cfbd65_cryptolocker.exe 81
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-21_7e6e384f14e83024e37d0a99e4cfbd65_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-21_7e6e384f14e83024e37d0a99e4cfbd65_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2832 -
C:\Users\Admin\AppData\Local\Temp\gewos.exe"C:\Users\Admin\AppData\Local\Temp\gewos.exe"2⤵
- Checks computer location settings
- Executes dropped EXE
PID:2864
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
60KB
MD513f1439f797df84ca4617eab8c604a22
SHA12323d3d6ef7dc19ee7ac8ce2293c34b5097eb321
SHA256ac9f1731f27327e4a5ea7944344cfada2c08a1d41f5b82630f7ff3f62a0d7ae8
SHA512ff811ea08e1703a0d6c25f78e28a24ef829da536bb072f42c63bd09b767adcba0e38147b6055d0f0617b5af6b56bf4a7c3382bc2b66f17a21400db461214f60a