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Analysis
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max time kernel
137s -
max time network
143s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
20/02/2024, 14:52
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-20_a0b0149fb8c352722ca3732e499123e9_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-20_a0b0149fb8c352722ca3732e499123e9_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-02-20_a0b0149fb8c352722ca3732e499123e9_cryptolocker.exe
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Size
58KB
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MD5
a0b0149fb8c352722ca3732e499123e9
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SHA1
094d891b90b7e37dd8643f1bd4706003a6ed8042
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SHA256
636f0198735446ab2e6e522f29c87c03f91d08fcece3b7df6f44dbb8ed7522b7
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SHA512
122f770bd669b48e7c9220cde75d0e5552995d47b490125b7b714c92f2cb05b1e93bbaa567a9d5653ff56515d275f3f1f153567f0479edb01fc29c3993896e7a
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SSDEEP
1536:btB9g/xtCSKfxLIc//Xr+/AO/kIZ3ft2nVuTKB6nggOlHdUHD:btng54SMLr+/AO/kIhfoKMHdu
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x0007000000023127-12.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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation 2024-02-20_a0b0149fb8c352722ca3732e499123e9_cryptolocker.exe Key value queried \REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation gewos.exe -
Executes dropped EXE 1 IoCs
pid Process 4184 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 792 wrote to memory of 4184 792 2024-02-20_a0b0149fb8c352722ca3732e499123e9_cryptolocker.exe 83 PID 792 wrote to memory of 4184 792 2024-02-20_a0b0149fb8c352722ca3732e499123e9_cryptolocker.exe 83 PID 792 wrote to memory of 4184 792 2024-02-20_a0b0149fb8c352722ca3732e499123e9_cryptolocker.exe 83
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-20_a0b0149fb8c352722ca3732e499123e9_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-20_a0b0149fb8c352722ca3732e499123e9_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:792 -
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:4184
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
58KB
MD55d54346356f4e6542cc8f4ccb19eb061
SHA17a8c19f9b4021faae15956cab6e088aae11256b4
SHA256e2d62ba3570f35bc74bf55c6ad5e45ee5c5b32281b632057c527b07ccc5a400b
SHA51229bf42ea48d97f9da56cf89e534ce69585069b9b51fd1f7190f41803dc1fdf71aa4c798f7a27d9dbde9b0e17b75bc0b4960325679269c3dfdd4d4f1929056546