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Analysis
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max time kernel
91s -
max time network
124s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
13/02/2024, 07:25
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-13_0f3acc4a58b9240588224e7d55d0bf1c_cryptolocker.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-02-13_0f3acc4a58b9240588224e7d55d0bf1c_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-02-13_0f3acc4a58b9240588224e7d55d0bf1c_cryptolocker.exe
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Size
56KB
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MD5
0f3acc4a58b9240588224e7d55d0bf1c
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SHA1
54869ccb7c4793aacdea352d91376a78e6653cdf
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SHA256
0295268340e502250ddbf6ee554d22572ce699a9937412eb9f2f4fbc734c7ae7
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SHA512
3bdb2b0ca1012aeb45ffe88419de6c6775d4016cca4a7c3cfd475d13bfc66453015a3750d5ae065fc6cf7662eaa186ef12f41d43921f7e253eeb4b6d0ec21ab5
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SSDEEP
1536:btB9g/xtCSKfxLIc//Xr+/AO/kIZ3ft2nVuTKB6nggOlHdUHK:btng54SMLr+/AO/kIhfoKMHdH
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x000700000002304b-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-1-5-21-1232405761-1209240240-3206092754-1000\Control Panel\International\Geo\Nation 2024-02-13_0f3acc4a58b9240588224e7d55d0bf1c_cryptolocker.exe Key value queried \REGISTRY\USER\S-1-5-21-1232405761-1209240240-3206092754-1000\Control Panel\International\Geo\Nation gewos.exe -
Executes dropped EXE 1 IoCs
pid Process 3036 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 3996 wrote to memory of 3036 3996 2024-02-13_0f3acc4a58b9240588224e7d55d0bf1c_cryptolocker.exe 85 PID 3996 wrote to memory of 3036 3996 2024-02-13_0f3acc4a58b9240588224e7d55d0bf1c_cryptolocker.exe 85 PID 3996 wrote to memory of 3036 3996 2024-02-13_0f3acc4a58b9240588224e7d55d0bf1c_cryptolocker.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-13_0f3acc4a58b9240588224e7d55d0bf1c_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-13_0f3acc4a58b9240588224e7d55d0bf1c_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3996 -
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:3036
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
56KB
MD51e1657cabc18203a2c01bc89c559b095
SHA16879855f4a5e4512d80c69c095b455706ddc3a76
SHA256332cf42193e454f3917fd70216e31e5553837fe45f775868cb2a1a73d6f02020
SHA51212a6e3ea85ffb48c6caee81dee2a66bdac3cb068a7186c4c73566a4c4ace7bb46b8c932dbd873b77b29cac6268f41f6d97a2386e5a18753da77901aeaec75564