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Analysis
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max time kernel
149s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
14/05/2024, 05:22
Behavioral task
behavioral1
Sample
2024-05-14_0931e1c97e2e0b95047f5a780e5a2e4f_cryptolocker.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-05-14_0931e1c97e2e0b95047f5a780e5a2e4f_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-14_0931e1c97e2e0b95047f5a780e5a2e4f_cryptolocker.exe
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Size
56KB
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MD5
0931e1c97e2e0b95047f5a780e5a2e4f
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SHA1
9f859acfa78232415b7a1b589e27744126c2ae2f
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SHA256
b45396e0b6ab277e2313d53291a3ab0a574ab0a183f8727650d423e8cf6d7b78
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SHA512
13f86f0e2c6abdee741ff234c18d24d6d48d1493f37c235f1fe0fff0f766c8bb452a2c2c3551893e6585e0e9dbde09738c18c82532a7242dddb540688f79717e
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SSDEEP
768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjlYRM:bP9g/xtCS3Dxx0Lm
Malware Config
Signatures
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Detection of CryptoLocker Variants 3 IoCs
resource yara_rule behavioral2/memory/2840-0-0x0000000000400000-0x000000000040E000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000d000000023383-13.dat CryptoLocker_rule2 behavioral2/memory/3052-19-0x0000000000400000-0x000000000040E000-memory.dmp CryptoLocker_rule2 -
UPX dump on OEP (original entry point) 3 IoCs
resource yara_rule behavioral2/memory/2840-0-0x0000000000400000-0x000000000040E000-memory.dmp UPX behavioral2/files/0x000d000000023383-13.dat UPX behavioral2/memory/3052-19-0x0000000000400000-0x000000000040E000-memory.dmp UPX -
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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation 2024-05-14_0931e1c97e2e0b95047f5a780e5a2e4f_cryptolocker.exe Key value queried \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation gewos.exe -
Executes dropped EXE 1 IoCs
pid Process 3052 gewos.exe -
resource yara_rule behavioral2/memory/2840-0-0x0000000000400000-0x000000000040E000-memory.dmp upx behavioral2/files/0x000d000000023383-13.dat upx behavioral2/memory/3052-19-0x0000000000400000-0x000000000040E000-memory.dmp 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 2840 wrote to memory of 3052 2840 2024-05-14_0931e1c97e2e0b95047f5a780e5a2e4f_cryptolocker.exe 84 PID 2840 wrote to memory of 3052 2840 2024-05-14_0931e1c97e2e0b95047f5a780e5a2e4f_cryptolocker.exe 84 PID 2840 wrote to memory of 3052 2840 2024-05-14_0931e1c97e2e0b95047f5a780e5a2e4f_cryptolocker.exe 84
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-14_0931e1c97e2e0b95047f5a780e5a2e4f_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-14_0931e1c97e2e0b95047f5a780e5a2e4f_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2840 -
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:3052
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
56KB
MD58812d43b9c83b939ca37fc6085fbfbf1
SHA162c2ee332fb864f16437f6593241495feba2ae30
SHA256a0626cbd0b274701acb17940925cdaeb8fdc79aa887d5269b5773bbeaa974804
SHA5128697922e25e34850e50fd2b32acd40ca1b66d104a6481ed7ec346da58b1b33402d9f9e7fa367009d2d212036522eadcbca835101b3962e872b71a522d77abc14
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Filesize
185B
MD5e048fe178e12dce5e3547723c6973529
SHA11a42e1e72f87b820f50d0b0af2209279d0196365
SHA256897018ea02eb46681023900c145fbceeae63acf45b370e448842e6198caa88c4
SHA5128965eb6c9fce284af17de43a0d3dbd05fa0044b5ea5318fdcc3841776b1393d953ac3abc091375291f340e551bc22d499823278003c6426889fa69aa2cafdd81