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Analysis
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max time kernel
149s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
21/05/2024, 15:42
Behavioral task
behavioral1
Sample
2024-05-21_534003edc0cf10464fcaa6b66b8b8036_cryptolocker.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-05-21_534003edc0cf10464fcaa6b66b8b8036_cryptolocker.exe
Resource
win10v2004-20240426-en
General
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Target
2024-05-21_534003edc0cf10464fcaa6b66b8b8036_cryptolocker.exe
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Size
68KB
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MD5
534003edc0cf10464fcaa6b66b8b8036
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SHA1
cd29699d53c6b16ada8fac25198472e411d8b214
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SHA256
4624aae5c3cd4d994d8dc3f800df640d667fbc3e88742874e0f21f4c3620bac9
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SHA512
6e322f107e5607b9f6d44ce262c8c7eea552741be4d14a0a824c9b63da63c752e5bfd95c01202635becc2e06e74d941fb605ac55a279731768e5ca0e537618f5
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SSDEEP
1536:quJu9cvMOtEvwDpjWYTjipvF2bx1PQAek:78SEOtEvwDpjWYvQd2Px
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/2460-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0008000000023286-13.dat CryptoLocker_rule2 behavioral2/memory/2460-16-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3568-26-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/2460-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/files/0x0008000000023286-13.dat CryptoLocker_set1 behavioral2/memory/2460-16-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/3568-26-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/2460-0-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/files/0x0008000000023286-13.dat UPX behavioral2/memory/2460-16-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/memory/3568-26-0x0000000000500000-0x000000000050F000-memory.dmp 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-1-5-21-540404634-651139247-2967210625-1000\Control Panel\International\Geo\Nation 2024-05-21_534003edc0cf10464fcaa6b66b8b8036_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3568 asih.exe -
resource yara_rule behavioral2/memory/2460-0-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/files/0x0008000000023286-13.dat upx behavioral2/memory/2460-16-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/memory/3568-26-0x0000000000500000-0x000000000050F000-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 2460 wrote to memory of 3568 2460 2024-05-21_534003edc0cf10464fcaa6b66b8b8036_cryptolocker.exe 83 PID 2460 wrote to memory of 3568 2460 2024-05-21_534003edc0cf10464fcaa6b66b8b8036_cryptolocker.exe 83 PID 2460 wrote to memory of 3568 2460 2024-05-21_534003edc0cf10464fcaa6b66b8b8036_cryptolocker.exe 83
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-21_534003edc0cf10464fcaa6b66b8b8036_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-21_534003edc0cf10464fcaa6b66b8b8036_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2460 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:3568
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
69KB
MD5024a143e0a8e33d9bdf886a873ea1204
SHA1a364edfae8b5abb17118fedda508646b9afc498b
SHA2567db8093b625868e1f13a768e74735a6d1106b1ed28ed8ae93be8db6bf7af1e06
SHA512dd8f4e264f7effc75016f07cec9ace71844e035d430af785206791793bae0c9f9ba94d0b5050852233e32d76a095839312d7e12f4b0653863ce1f02a7b6ec417