Analysis
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max time kernel
148s -
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
06/03/2024, 05:45
Static task
static1
Behavioral task
behavioral1
Sample
2024-03-06_425b94b806b9d7c8cf51996942cd664f_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-03-06_425b94b806b9d7c8cf51996942cd664f_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-03-06_425b94b806b9d7c8cf51996942cd664f_cryptolocker.exe
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Size
42KB
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MD5
425b94b806b9d7c8cf51996942cd664f
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SHA1
fccc120ed590521bdfd4cc9723a02c1ac724bbc0
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SHA256
c2b1487ff0cae649a5eb3fc0c0fafc9a8188ca0de838e045cebd81b90637ed7f
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SHA512
438b9b0deeeaedc5636c536a9a4b90eb92451fdf3756fc8657a8a67f8774bc2365a97fd702c4ccb656fd949f99010c9c3bd7cd6e1e6f45a9891e206294179341
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SSDEEP
768:b7o/2n1TCraU6GD1a4X0WcO+wMVm+slAMphej6J:bc/y2lkF0+Bex
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x000700000002327d-12.dat CryptoLocker_rule2 -
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 2024-03-06_425b94b806b9d7c8cf51996942cd664f_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4492 rewok.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 4896 wrote to memory of 4492 4896 2024-03-06_425b94b806b9d7c8cf51996942cd664f_cryptolocker.exe 97 PID 4896 wrote to memory of 4492 4896 2024-03-06_425b94b806b9d7c8cf51996942cd664f_cryptolocker.exe 97 PID 4896 wrote to memory of 4492 4896 2024-03-06_425b94b806b9d7c8cf51996942cd664f_cryptolocker.exe 97
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-03-06_425b94b806b9d7c8cf51996942cd664f_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-03-06_425b94b806b9d7c8cf51996942cd664f_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4896 -
C:\Users\Admin\AppData\Local\Temp\rewok.exe"C:\Users\Admin\AppData\Local\Temp\rewok.exe"2⤵
- Executes dropped EXE
PID:4492
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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=4472 --field-trial-handle=2656,i,16940681401824032220,151921362336696246,262144 --variations-seed-version /prefetch:81⤵PID:4592
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
43KB
MD53580ee487f626bfca527aeb6c8e0c1a7
SHA196c2ce3803c9d4e392f8246c1368ac7b0d3e95e8
SHA256a59474c638947c05f23d546f6725b6db8fee8b31083161fa52d0b67fe189fbe8
SHA51206e1c38d15291df780ef8c0cebc0eae0001b9e095be239491c5bbddab4433448232d9c4b37111d35e562bb4806cddd293b628239ccd94f15cb58e0c4e1aeb94a