Analysis
- max time kernel
148s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
31/05/2024, 08:22
General
- Target 2024-05-31_10bf135c5a1b7920e71a1fbbdfeb2b2c_cryptolocker.exe
- Size 40KB
- Sample240531-j9pcxsda77
- SHA256 ded7ac78b3b327e6ee2cd5151055f775068407191cd0a77798b2cf267bdad6b8
Score
9/10
Malware Config
Signatures
- Detection of CryptoLocker Variants 5 IoCs
- Detection of Cryptolocker Samples 5 IoCs
- UPX dump on OEP (original entry point) 5 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- UPX packed file 5 IoCs
Detects executables packed with UPX/modified UPX open source packer.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Suspicious use of WriteProcessMemory 3 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\2024-05-31_10bf135c5a1b7920e71a1fbbdfeb2b2c_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-31_10bf135c5a1b7920e71a1fbbdfeb2b2c_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
-
-
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 --field-trial-handle=4012,i,2607710392823067546,4648797561512801463,262144 --variations-seed-version --mojo-platform-channel-handle=2860 /prefetch:81⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
asih.exe
memory/1724-0-0x0000000000500000-0x0000000000510000-memory.dmp
memory/1724-1-0x00000000006B0000-0x00000000006B6000-memory.dmp
memory/1724-2-0x00000000006D0000-0x00000000006D6000-memory.dmp
memory/1724-9-0x00000000006B0000-0x00000000006B6000-memory.dmp
memory/1724-17-0x0000000000500000-0x0000000000510000-memory.dmp
memory/4092-18-0x0000000000500000-0x0000000000510000-memory.dmp
memory/4092-20-0x00000000007E0000-0x00000000007E6000-memory.dmp
memory/4092-26-0x0000000000500000-0x0000000000510000-memory.dmp