Analysis
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max time kernel
148s -
max time network
157s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
27/05/2024, 18:30
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-27_55a0b40c22a95eac0dbff8795ed8fc74_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-27_55a0b40c22a95eac0dbff8795ed8fc74_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-27_55a0b40c22a95eac0dbff8795ed8fc74_cryptolocker.exe
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Size
38KB
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MD5
55a0b40c22a95eac0dbff8795ed8fc74
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SHA1
53c27d79eea6cf800809376a4f62b0e0d4b7d218
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SHA256
c89ca41e31e7a575c6ffa74026799ee5f1dd64e2a03beae1402f62a7de7f9471
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SHA512
2ab91de710533613f27c830b0b05f232bf60afa313ecb1cec595613ee1186304e1c092f72efe5377a7835157eba55f79a4dce823d9aab0ffae7efc4a5c6f6164
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SSDEEP
768:b7o/2n1TCraU6GD1a4Xt9bRU6zA6o36mhl:bc/y2lLRU6zA6qz
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x000900000002353a-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-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation 2024-05-27_55a0b40c22a95eac0dbff8795ed8fc74_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3272 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 3816 wrote to memory of 3272 3816 2024-05-27_55a0b40c22a95eac0dbff8795ed8fc74_cryptolocker.exe 90 PID 3816 wrote to memory of 3272 3816 2024-05-27_55a0b40c22a95eac0dbff8795ed8fc74_cryptolocker.exe 90 PID 3816 wrote to memory of 3272 3816 2024-05-27_55a0b40c22a95eac0dbff8795ed8fc74_cryptolocker.exe 90
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-27_55a0b40c22a95eac0dbff8795ed8fc74_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-27_55a0b40c22a95eac0dbff8795ed8fc74_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3816 -
C:\Users\Admin\AppData\Local\Temp\rewok.exe"C:\Users\Admin\AppData\Local\Temp\rewok.exe"2⤵
- Executes dropped EXE
PID:3272
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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 --field-trial-handle=4592,i,6166776566165096562,4582328833313060853,262144 --variations-seed-version --mojo-platform-channel-handle=4200 /prefetch:81⤵PID:4152
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
39KB
MD5ef030987595a2209bec02017a2744e52
SHA143ef072e3ec02bb6781ac2e28cc89db78486983f
SHA256b28a58aca338fbebdf38af4b8968227781e98ebaaadad0f586858e6a1bd1b444
SHA51203a29b5b465470bffc90df171290b3d5f5f4b4e8e204e1eabb4670381b6f8c08153a15a12dbdee850e836ecb55dd0827b4086d3a50b0e839f02bd81e309251df