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Analysis
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max time kernel
151s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
04/06/2024, 05:41
Behavioral task
behavioral1
Sample
2024-06-04_8503e62f8d7938b273a76cdf33e6468d_cryptolocker.exe
Resource
win7-20240419-en
Behavioral task
behavioral2
Sample
2024-06-04_8503e62f8d7938b273a76cdf33e6468d_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-06-04_8503e62f8d7938b273a76cdf33e6468d_cryptolocker.exe
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Size
54KB
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MD5
8503e62f8d7938b273a76cdf33e6468d
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SHA1
17c007cb0bb976301c4ebe8557991eb4a64c6a31
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SHA256
468e0d7a4b1070dd6156fb63df8ec84c85cfe31abb9b214adfdf220925186d7b
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SHA512
1a6adb017092808c84cda63cceec474bf532d7648022fc1c7c897a7874a92829e10ac4facdde6c01c12bae6d4ffdd98239340819da448def7b282dfe076442f6
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SSDEEP
768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YY1J+OTOkaX:z6QFElP6n+gKmddpMOtEvwDpj31iko
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/864-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0008000000023264-13.dat CryptoLocker_rule2 behavioral2/memory/864-25-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3980-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/864-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x0008000000023264-13.dat CryptoLocker_set1 behavioral2/memory/864-25-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/3980-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/864-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x0008000000023264-13.dat UPX behavioral2/memory/864-25-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/3980-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation 2024-06-04_8503e62f8d7938b273a76cdf33e6468d_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3980 asih.exe -
resource yara_rule behavioral2/memory/864-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x0008000000023264-13.dat upx behavioral2/memory/864-25-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/3980-26-0x0000000000500000-0x0000000000510000-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 864 wrote to memory of 3980 864 2024-06-04_8503e62f8d7938b273a76cdf33e6468d_cryptolocker.exe 89 PID 864 wrote to memory of 3980 864 2024-06-04_8503e62f8d7938b273a76cdf33e6468d_cryptolocker.exe 89 PID 864 wrote to memory of 3980 864 2024-06-04_8503e62f8d7938b273a76cdf33e6468d_cryptolocker.exe 89
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-04_8503e62f8d7938b273a76cdf33e6468d_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-04_8503e62f8d7938b273a76cdf33e6468d_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:864 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:3980
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C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3804 --field-trial-handle=2264,i,15001568551143786084,90255922961447677,262144 --variations-seed-version /prefetch:81⤵PID:2596
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
54KB
MD57e50d8f3c333c66edcbf319e8c9a3c38
SHA1c4e62551d0838ee3aca103587ab2491a4d46f0d9
SHA2563c5ad7ff754164ccb20bee6b4be4f57ad2a0369ff7496e7a7d095ff9511fbd20
SHA512ad113b155581f9e3fddc7ae52f74751b4a6ff1e5ea09e5632aefd7c1e15eff9e1a17ac2a672de1b928041cbe640178d8bfa178c46fdc507b6c50c48bf6bcc35c