Analysis
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max time kernel
141s -
max time network
154s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
19-03-2024 16:41
Static task
static1
Behavioral task
behavioral1
Sample
2024-03-19_6a8249c667ea7bd213cc86716e5da79f_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-03-19_6a8249c667ea7bd213cc86716e5da79f_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-03-19_6a8249c667ea7bd213cc86716e5da79f_cryptolocker.exe
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Size
64KB
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MD5
6a8249c667ea7bd213cc86716e5da79f
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SHA1
99b3896c0117643ec4ebe61a326e306e557aba06
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SHA256
f8e8a751176e26728179d7406f37d142fcb4dc3a56e7088c3f723a3fa8c9b5fa
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SHA512
66c9e04acdd14f49e5c5e99455af5a40f93a52678685e790c0352177f12d018e50e6dfceac27600f38e21fdf3577b680a30e59908a0bb028afe600e0929d193f
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SSDEEP
1536:V6QFElP6n+gMQMOtEvwDpjyaLccVCbmh85f:V6a+pOtEvwDpjvo
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x0004000000022ea3-12.dat CryptoLocker_rule2 -
Detection of Cryptolocker Samples 1 IoCs
resource yara_rule behavioral2/files/0x0004000000022ea3-12.dat CryptoLocker_set1 -
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 2024-03-19_6a8249c667ea7bd213cc86716e5da79f_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2932 asih.exe -
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 5008 wrote to memory of 2932 5008 2024-03-19_6a8249c667ea7bd213cc86716e5da79f_cryptolocker.exe 97 PID 5008 wrote to memory of 2932 5008 2024-03-19_6a8249c667ea7bd213cc86716e5da79f_cryptolocker.exe 97 PID 5008 wrote to memory of 2932 5008 2024-03-19_6a8249c667ea7bd213cc86716e5da79f_cryptolocker.exe 97
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-03-19_6a8249c667ea7bd213cc86716e5da79f_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-03-19_6a8249c667ea7bd213cc86716e5da79f_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5008 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2932
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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=3772 --field-trial-handle=2276,i,11674642242468042059,14711253743544118298,262144 --variations-seed-version /prefetch:81⤵PID:3808
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
64KB
MD5d6f6494ecd089c7923aae3c1bdacd326
SHA1ad9b9bc62e8bc49cdbb956a1e314283fa91349ad
SHA2569bf3d0347500e48112c00829cd00afd0e00fc6dd51e47752e29dbb66a6581cbc
SHA5122db341d261e81b9883d0b85db49ae65394a4b3f8951998bb8e9329f5b0582d32a594dc80be7be00bbd94ef672304020a96f3ac127f5fe651b238977ab4664e5d