Analysis
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max time kernel
149s -
max time network
155s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
29-05-2024 23:36
Behavioral task
behavioral1
Sample
2024-05-29_f0ed71de75ee953dd596a7a84e058d12_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-29_f0ed71de75ee953dd596a7a84e058d12_cryptolocker.exe
Resource
win10v2004-20240426-en
General
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Target
2024-05-29_f0ed71de75ee953dd596a7a84e058d12_cryptolocker.exe
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Size
40KB
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MD5
f0ed71de75ee953dd596a7a84e058d12
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SHA1
1ec212cfeb51155da5e12bf9c814e3c025e6e511
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SHA256
f2089b753f74a262c5f6ba508524c75e06433e14f40f1694b3ad8a1ab2ce2965
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SHA512
7b86e59ee4a5d0f79a0ce2af224a81ba9cb9ed747706148703ac06a8a215d374edf1ffebd3833c737280aaf5f31daef650603ce71a35030226506a8f8296e456
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SSDEEP
768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY/0o:qDdFJy3QMOtEvwDpjjWMl7TE
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/3504-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0005000000023126-13.dat CryptoLocker_rule2 behavioral2/memory/4724-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3504-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4724-28-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/3504-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x0005000000023126-13.dat CryptoLocker_set1 behavioral2/memory/4724-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/3504-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4724-28-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/3504-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x0005000000023126-13.dat UPX behavioral2/memory/4724-16-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/3504-19-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4724-28-0x0000000000500000-0x0000000000510000-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-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation 2024-05-29_f0ed71de75ee953dd596a7a84e058d12_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4724 asih.exe -
resource yara_rule behavioral2/memory/3504-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x0005000000023126-13.dat upx behavioral2/memory/4724-16-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/3504-19-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4724-28-0x0000000000500000-0x0000000000510000-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 3504 wrote to memory of 4724 3504 2024-05-29_f0ed71de75ee953dd596a7a84e058d12_cryptolocker.exe 81 PID 3504 wrote to memory of 4724 3504 2024-05-29_f0ed71de75ee953dd596a7a84e058d12_cryptolocker.exe 81 PID 3504 wrote to memory of 4724 3504 2024-05-29_f0ed71de75ee953dd596a7a84e058d12_cryptolocker.exe 81
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-29_f0ed71de75ee953dd596a7a84e058d12_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-29_f0ed71de75ee953dd596a7a84e058d12_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3504 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4724
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
40KB
MD57f16c4538f5ff64db3548e3719954577
SHA1e43480f33b9343508de6bae1d925644328d0f592
SHA256c6b4610bc168ec993de3b6d030b5c87a798966a54515b2e54b3c06d6742859ad
SHA512fcc8b312efb8e7ecaa8017f7845ea0ec73a144bd5cb9bb93cc02c4bdb4e5c35c71e02968c1e2105d688a90f95ae83deddc5bbedd7098f7b835089830a0150b7a