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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
07/03/2024, 23:29
Static task
static1
Behavioral task
behavioral1
Sample
2024-03-07_57973aca44473d723dd9b977242214d8_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-03-07_57973aca44473d723dd9b977242214d8_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-03-07_57973aca44473d723dd9b977242214d8_cryptolocker.exe
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Size
59KB
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MD5
57973aca44473d723dd9b977242214d8
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SHA1
0091bdb5732b03a27eb8174c5d2200be206d9dd7
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SHA256
aca1a0c73b75bba9b5d1d0de1a026f27b71d7458ecbb2752303cba49b271e348
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SHA512
7850d7722ab9c1a3cb66d0a35ae94d7b09a3a23ae0bbc308aef1789b8d36628da40461474cfdc1d45f16fb62823ca7815e2a55c5f0baa1b04d27c8aa5fada6ea
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SSDEEP
1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb614v:BbdDmjr+OtEvwDpjMs
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/2800-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000400000001e980-13.dat CryptoLocker_rule2 behavioral2/memory/1132-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2800-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1132-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 2 IoCs
resource yara_rule behavioral2/memory/2800-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/1132-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/2800-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000400000001e980-13.dat UPX behavioral2/memory/1132-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/2800-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/1132-27-0x0000000000500000-0x0000000000510000-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-1-5-21-3270530367-132075249-2153716227-1000\Control Panel\International\Geo\Nation 2024-03-07_57973aca44473d723dd9b977242214d8_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 1132 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 2800 wrote to memory of 1132 2800 2024-03-07_57973aca44473d723dd9b977242214d8_cryptolocker.exe 87 PID 2800 wrote to memory of 1132 2800 2024-03-07_57973aca44473d723dd9b977242214d8_cryptolocker.exe 87 PID 2800 wrote to memory of 1132 2800 2024-03-07_57973aca44473d723dd9b977242214d8_cryptolocker.exe 87
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-03-07_57973aca44473d723dd9b977242214d8_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-03-07_57973aca44473d723dd9b977242214d8_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2800 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:1132
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
59KB
MD53f0372f4e0152bef3455d8c3a87a033e
SHA1b9b9a1cf9db4883808fee561d8bf7429e1cb3446
SHA256a400e03046e77a5c70552b39d298c84612af72f9484631862c4ea0be1751d568
SHA512fda24246f3843f273b1b462f6e6af9f40feb1f78af0fb1169a1e356801a44fa11f146afc161a702015da442752dcac70c748d437afda0bd4d06c117191b3eac0