Analysis
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max time kernel
143s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
12-02-2024 19:24
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-12_6401ac593a0c4e0c62503174c27ed859_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-12_6401ac593a0c4e0c62503174c27ed859_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-02-12_6401ac593a0c4e0c62503174c27ed859_cryptolocker.exe
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Size
44KB
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MD5
6401ac593a0c4e0c62503174c27ed859
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SHA1
9cc0e90d50ea892d13b9b790f9f2312afcc6ebdd
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SHA256
8b356a2b9fafc5d496579c2fd739178cb49e31aeb845ae28574321b439598629
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SHA512
5ae81f57a0a2839765abaf01dcaf7e3d11ce73387ab72a36a3a39f65a1eb88d99827634cafe7619a7703888e7072dde2cbbc8d474538165ca2408526d84e9d74
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SSDEEP
768:btB9g/WItCSsAGjX7r3BPOMHocM4vUUOmJ+96egDy:btB9g/xtCSKfxLIcMzUw96ny
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
Processes:
resource yara_rule C:\Users\Admin\AppData\Local\Temp\gewos.exe CryptoLocker_rule2 -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
2024-02-12_6401ac593a0c4e0c62503174c27ed859_cryptolocker.exegewos.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-635608581-3370340891-292606865-1000\Control Panel\International\Geo\Nation 2024-02-12_6401ac593a0c4e0c62503174c27ed859_cryptolocker.exe Key value queried \REGISTRY\USER\S-1-5-21-635608581-3370340891-292606865-1000\Control Panel\International\Geo\Nation gewos.exe -
Executes dropped EXE 1 IoCs
Processes:
gewos.exepid process 1548 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
Processes:
2024-02-12_6401ac593a0c4e0c62503174c27ed859_cryptolocker.exedescription pid process target process PID 1012 wrote to memory of 1548 1012 2024-02-12_6401ac593a0c4e0c62503174c27ed859_cryptolocker.exe gewos.exe PID 1012 wrote to memory of 1548 1012 2024-02-12_6401ac593a0c4e0c62503174c27ed859_cryptolocker.exe gewos.exe PID 1012 wrote to memory of 1548 1012 2024-02-12_6401ac593a0c4e0c62503174c27ed859_cryptolocker.exe gewos.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-12_6401ac593a0c4e0c62503174c27ed859_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-12_6401ac593a0c4e0c62503174c27ed859_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1012 -
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:1548
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
44KB
MD5ba4d837298b794ad4d3c3f3421f8de36
SHA109a1cad2e5b39efd81e01002a1629b4c26399a16
SHA2562672275fc30b0d89bf2018a46a0badf15d9953205e0575f2279955416ab3613e
SHA512b2312e2c3c600c44342ae73766ab84114b128dcbcf118a603b891193e91d548992588fe3f2e6c943e85b9e1417dc8400ed2d818941987ca4439c58bb30c4eb8c