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Analysis
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max time kernel
150s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240419-en -
resource tags
arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system -
submitted
01/05/2024, 05:16
Behavioral task
behavioral1
Sample
2024-05-01_cd09f70ca2ec941e1d2f9558041fdf4d_cryptolocker.exe
Resource
win7-20240419-en
Behavioral task
behavioral2
Sample
2024-05-01_cd09f70ca2ec941e1d2f9558041fdf4d_cryptolocker.exe
Resource
win10v2004-20240419-en
General
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Target
2024-05-01_cd09f70ca2ec941e1d2f9558041fdf4d_cryptolocker.exe
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Size
55KB
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MD5
cd09f70ca2ec941e1d2f9558041fdf4d
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SHA1
c36c6f46c42a3900b0b179e03be82657106f0d36
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SHA256
90f9f4038be6bc33eb3cb19aca8767dd0c19421d4db190bc8bc111b5805ba1f9
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SHA512
c4447e3ddd7de4420a944a6f0bb8dd66d727288b433b6f7c08f75e80f9c8445b9bdf4126d4732138bc29ea2b6c5b1c5ca03021281e183661c0afe99fd62eb97a
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SSDEEP
768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjl9x:bP9g/xtCS3Dxx0w
Malware Config
Signatures
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Detection of CryptoLocker Variants 2 IoCs
resource yara_rule behavioral2/memory/4040-0-0x0000000000400000-0x000000000040E000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000c000000023b5f-13.dat CryptoLocker_rule2 -
UPX dump on OEP (original entry point) 2 IoCs
resource yara_rule behavioral2/memory/4040-0-0x0000000000400000-0x000000000040E000-memory.dmp UPX behavioral2/files/0x000c000000023b5f-13.dat UPX -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-877519540-908060166-1852957295-1000\Control Panel\International\Geo\Nation 2024-05-01_cd09f70ca2ec941e1d2f9558041fdf4d_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2600 gewos.exe -
resource yara_rule behavioral2/memory/4040-0-0x0000000000400000-0x000000000040E000-memory.dmp upx behavioral2/files/0x000c000000023b5f-13.dat upx -
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 4040 wrote to memory of 2600 4040 2024-05-01_cd09f70ca2ec941e1d2f9558041fdf4d_cryptolocker.exe 83 PID 4040 wrote to memory of 2600 4040 2024-05-01_cd09f70ca2ec941e1d2f9558041fdf4d_cryptolocker.exe 83 PID 4040 wrote to memory of 2600 4040 2024-05-01_cd09f70ca2ec941e1d2f9558041fdf4d_cryptolocker.exe 83
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-01_cd09f70ca2ec941e1d2f9558041fdf4d_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-01_cd09f70ca2ec941e1d2f9558041fdf4d_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4040 -
C:\Users\Admin\AppData\Local\Temp\gewos.exe"C:\Users\Admin\AppData\Local\Temp\gewos.exe"2⤵
- Executes dropped EXE
PID:2600
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
55KB
MD50b41282d7a93103841964da13dd44153
SHA15c107c919067ff4c8aec7a0f0aac7ed0c7a5d227
SHA256e18f13867818a6a60538c642064a62cdc8e3cf8ddeec9df2d56ae02643758063
SHA5122220f3f52a3da074a9ca6c5c563991a73cbf603449c5f22b698d6d1211a06c42c27d68a6978581e2a00d31eb50a86156ebe9043aa865f1c22b923d442424498d