Analysis
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max time kernel
146s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
15-03-2024 13:54
Behavioral task
behavioral1
Sample
2024-03-15_9cc0d5d086f789dfd2fc4fbd5232d0d3_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-03-15_9cc0d5d086f789dfd2fc4fbd5232d0d3_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-03-15_9cc0d5d086f789dfd2fc4fbd5232d0d3_cryptolocker.exe
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Size
87KB
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MD5
9cc0d5d086f789dfd2fc4fbd5232d0d3
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SHA1
f9ae0fc38db2cb5579da7079b4d0dfcf4c3bf21f
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SHA256
5072b322649fd2ba89220ab24448035fa1db78a19705cc9e4b40c48c1a8ea65f
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SHA512
56a536ad529ccad5a66b2c4291993fd715ee4c8a030289ae46644e35e048757ac9b28027ce5fcd02a73f84c207eba623cdbb11e7b24a3e67312e913ef3c9de79
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SSDEEP
768:qkmnjFom/kLyMro2GtOOtEvwDpjeY10Y/YMsvlMdwPK80GQuchoIgtIJ/q:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgn
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/2784-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000800000001db2a-13.dat CryptoLocker_rule2 behavioral2/memory/2784-18-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3252-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3252-27-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/2784-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000800000001db2a-13.dat CryptoLocker_set1 behavioral2/memory/2784-18-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/3252-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/3252-27-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/2784-0-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/files/0x000800000001db2a-13.dat UPX behavioral2/memory/2784-18-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/memory/3252-17-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/memory/3252-27-0x0000000000500000-0x000000000050F000-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-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation 2024-03-15_9cc0d5d086f789dfd2fc4fbd5232d0d3_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3252 asih.exe -
resource yara_rule behavioral2/memory/2784-0-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/files/0x000800000001db2a-13.dat upx behavioral2/memory/2784-18-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/memory/3252-17-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/memory/3252-27-0x0000000000500000-0x000000000050F000-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 2784 wrote to memory of 3252 2784 2024-03-15_9cc0d5d086f789dfd2fc4fbd5232d0d3_cryptolocker.exe 98 PID 2784 wrote to memory of 3252 2784 2024-03-15_9cc0d5d086f789dfd2fc4fbd5232d0d3_cryptolocker.exe 98 PID 2784 wrote to memory of 3252 2784 2024-03-15_9cc0d5d086f789dfd2fc4fbd5232d0d3_cryptolocker.exe 98
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-03-15_9cc0d5d086f789dfd2fc4fbd5232d0d3_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-03-15_9cc0d5d086f789dfd2fc4fbd5232d0d3_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2784 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:3252
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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=4056 --field-trial-handle=2272,i,11831746627654527593,10138103687018060346,262144 --variations-seed-version /prefetch:81⤵PID:2304
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
87KB
MD5dcf561b9f7640aa16e18c70a00f1d822
SHA1a379380d19685082785024a3cb801f2fdc38b678
SHA256fa5beb99492280ad4e15195062286fa36ab8cf0b8e8e6c86e099d86d03ebce86
SHA5121fdfd03310e2146f4cda2a196d378e65ca7160beb3bb9c41df0f074ec3b48fe681694a63ba9b227ab45fbc3588443ed41723a3d4fd65ee42390ea30fc0a43bc9