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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
02/02/2024, 10:37
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-02_aac9890e46e0f6aa7580bbba5a5ee0b5_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-02_aac9890e46e0f6aa7580bbba5a5ee0b5_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-02-02_aac9890e46e0f6aa7580bbba5a5ee0b5_cryptolocker.exe
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Size
60KB
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MD5
aac9890e46e0f6aa7580bbba5a5ee0b5
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SHA1
4db404abc9f3065a0b746eeb17f5ebda7fef5aba
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SHA256
ead8e3e9958652825e62446df553d7e99bd690b6873f4b4b77110f7ff6501f6a
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SHA512
e0c69f608444c519739ed0824ca51a82fc0275f7e3ab3da640543b79cae3b2a74ad760b0a38e2cda50d63d91dc9ed17dcce0c353578ad279d424a446dbd580d3
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SSDEEP
1536:btB9g/xtCSKfxLIc//Xr+/AO/kIZ3ft2nVuTKB6nggOlHdUHu:btng54SMLr+/AO/kIhfoKMHdD
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x0007000000023203-12.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-1-5-21-996941297-2279405024-2328152752-1000\Control Panel\International\Geo\Nation 2024-02-02_aac9890e46e0f6aa7580bbba5a5ee0b5_cryptolocker.exe Key value queried \REGISTRY\USER\S-1-5-21-996941297-2279405024-2328152752-1000\Control Panel\International\Geo\Nation gewos.exe -
Executes dropped EXE 1 IoCs
pid Process 4092 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 1560 wrote to memory of 4092 1560 2024-02-02_aac9890e46e0f6aa7580bbba5a5ee0b5_cryptolocker.exe 84 PID 1560 wrote to memory of 4092 1560 2024-02-02_aac9890e46e0f6aa7580bbba5a5ee0b5_cryptolocker.exe 84 PID 1560 wrote to memory of 4092 1560 2024-02-02_aac9890e46e0f6aa7580bbba5a5ee0b5_cryptolocker.exe 84
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-02_aac9890e46e0f6aa7580bbba5a5ee0b5_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-02_aac9890e46e0f6aa7580bbba5a5ee0b5_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1560 -
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:4092
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
60KB
MD5bf7ec7a43c8ef2f5f9fdfeff181df7c2
SHA128fee08dd2dca994c436612207c2cc309c34aa89
SHA256069a54e43cd2038be0e89508fac8b607f4f3bd504c45201112d751a804bc14e2
SHA51223856eec5d7b040b28c969044fdd20f9b821d721eb409a2061085b94376256cb0a77945b890fd48dfc9012547cbf684c0934e0f06aa0dbdbbf3d8bcf70e5b9e0