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Analysis
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max time kernel
150s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
10/04/2024, 04:02
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-10_f040f5df86115b058c12d728f6c537b0_cryptolocker.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-04-10_f040f5df86115b058c12d728f6c537b0_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-04-10_f040f5df86115b058c12d728f6c537b0_cryptolocker.exe
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Size
62KB
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MD5
f040f5df86115b058c12d728f6c537b0
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SHA1
26dea2efd44151f919d29eb1cf56579ad66affac
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SHA256
4673a33f82a3dbe019a2e5980ca5c62d0c41db38ba07d67db19c1aaa09a39253
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SHA512
a93f32d8e219c2e6f6052febc6b420ca4bb62c9fb9109fe7c25776f40823d32a4e6164579735c916bae8e48d87392f0127dc25cdc82e0bb7852c9c17db312371
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SSDEEP
1536:btB9g/xtCSKfxLIc//Xr+/AO/kIZ3ft2nVuTKB6nggOlHdUHa6:btng54SMLr+/AO/kIhfoKMHdQ
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x000f00000002313f-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-1-5-21-3270530367-132075249-2153716227-1000\Control Panel\International\Geo\Nation 2024-04-10_f040f5df86115b058c12d728f6c537b0_cryptolocker.exe Key value queried \REGISTRY\USER\S-1-5-21-3270530367-132075249-2153716227-1000\Control Panel\International\Geo\Nation gewos.exe -
Executes dropped EXE 1 IoCs
pid Process 2092 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 4676 wrote to memory of 2092 4676 2024-04-10_f040f5df86115b058c12d728f6c537b0_cryptolocker.exe 88 PID 4676 wrote to memory of 2092 4676 2024-04-10_f040f5df86115b058c12d728f6c537b0_cryptolocker.exe 88 PID 4676 wrote to memory of 2092 4676 2024-04-10_f040f5df86115b058c12d728f6c537b0_cryptolocker.exe 88
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-10_f040f5df86115b058c12d728f6c537b0_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-10_f040f5df86115b058c12d728f6c537b0_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4676 -
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:2092
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
62KB
MD5ab1267686e4a414ed015d9d5f7dd63da
SHA1fd88f5f01827a11312a92c82d801dba37b4ce47a
SHA256821d0997a1af74e401b308f7135dabef9988094fb79aafd8baac1122dc0a75e4
SHA512a1681e9ac3d6d2308ea7a33f0e0f7ad4a2388c3c51c4ca45c509b95e8e7a8f0424a0f332ddb6be4305235089d82c661c0eaf407452786122f1dbf097dc77e156