Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
09-05-2024 15:48
Behavioral task
behavioral1
Sample
2024-05-09_e85b102f2eecfb37ae20e323da590f21_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-09_e85b102f2eecfb37ae20e323da590f21_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-09_e85b102f2eecfb37ae20e323da590f21_cryptolocker.exe
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Size
39KB
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MD5
e85b102f2eecfb37ae20e323da590f21
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SHA1
a3e088f4c49b288bd68967b2d1c0a255a08bb6bc
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SHA256
d0fe111e7d6ba2449bf5d2d750cc8c878f772b7883dd8727820e19ac720a7a9f
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SHA512
89d22fc14afc68d2a6df3e190ee3a755cc210b02005b9066afe507d6b3ac10772012f3eb6df28a3513c537a707e1af3c0c0a508cfcedd95ba072a1d6ef12168b
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SSDEEP
768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaIzlH:qDdFJy3QMOtEvwDpjjWMl7TdEH
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/4152-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000a000000023400-13.dat CryptoLocker_rule2 behavioral2/memory/4152-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4908-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/4152-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000a000000023400-13.dat CryptoLocker_set1 behavioral2/memory/4152-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4908-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/4152-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000a000000023400-13.dat UPX behavioral2/memory/4152-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4908-27-0x0000000000500000-0x0000000000510000-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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation 2024-05-09_e85b102f2eecfb37ae20e323da590f21_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4908 asih.exe -
resource yara_rule behavioral2/memory/4152-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000a000000023400-13.dat upx behavioral2/memory/4152-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4908-27-0x0000000000500000-0x0000000000510000-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 4152 wrote to memory of 4908 4152 2024-05-09_e85b102f2eecfb37ae20e323da590f21_cryptolocker.exe 82 PID 4152 wrote to memory of 4908 4152 2024-05-09_e85b102f2eecfb37ae20e323da590f21_cryptolocker.exe 82 PID 4152 wrote to memory of 4908 4152 2024-05-09_e85b102f2eecfb37ae20e323da590f21_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-09_e85b102f2eecfb37ae20e323da590f21_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-09_e85b102f2eecfb37ae20e323da590f21_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4152 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4908
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
39KB
MD5cab9901a89bba01cfd294db4759f9e6c
SHA16a91feab897e8d08608126a47f5ad25b80ff6528
SHA25690fc6a138951c7f0d29dfdb941928252ce967f117d7c1af11518843b00ec1758
SHA512d427ab84b5f7d87e5103afb0946a906deaa8dafae17f86851fc3f76073f5ae3ccab110fc39685e83fe8dc13def19d164b7cfa5cdabae9f4b27c849d44a7262fb