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Analysis
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max time kernel
154s -
max time network
167s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
18/01/2024, 23:03
Static task
static1
Behavioral task
behavioral1
Sample
2024-01-18_8cf547c807ade177842b5bdb8b6d581b_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-01-18_8cf547c807ade177842b5bdb8b6d581b_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-01-18_8cf547c807ade177842b5bdb8b6d581b_cryptolocker.exe
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Size
58KB
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MD5
8cf547c807ade177842b5bdb8b6d581b
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SHA1
a0106d7f6343c594948e73a3d52f872f8285e9a0
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SHA256
26b765ec77613dd198b854e6e4578d264ccf6b8af8f8a8eb32e6c97f9e6f4bc2
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SHA512
d74b603f77c48660460ec85ba623648a38613149044e85084b37db81de0286b1dc726d02401d63c42585517288b9677a8e0caf7a58a32e1e7148cd031f15bd78
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SSDEEP
1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb614f:BbdDmjr+OtEvwDpjMU
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/5016-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0006000000023233-13.dat CryptoLocker_rule2 behavioral2/memory/5016-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4760-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 2 IoCs
resource yara_rule behavioral2/memory/5016-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4760-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/5016-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x0006000000023233-13.dat UPX behavioral2/memory/5016-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4760-26-0x0000000000500000-0x0000000000510000-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-1-5-21-983843758-932321429-1636175382-1000\Control Panel\International\Geo\Nation 2024-01-18_8cf547c807ade177842b5bdb8b6d581b_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4760 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 5016 wrote to memory of 4760 5016 2024-01-18_8cf547c807ade177842b5bdb8b6d581b_cryptolocker.exe 86 PID 5016 wrote to memory of 4760 5016 2024-01-18_8cf547c807ade177842b5bdb8b6d581b_cryptolocker.exe 86 PID 5016 wrote to memory of 4760 5016 2024-01-18_8cf547c807ade177842b5bdb8b6d581b_cryptolocker.exe 86
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-01-18_8cf547c807ade177842b5bdb8b6d581b_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-01-18_8cf547c807ade177842b5bdb8b6d581b_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5016 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4760
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
58KB
MD59f51e8a4b5b233f7e08f66bbdf1ded3a
SHA1685ed24e60918f88c5686c469f6c954e786e5273
SHA256fdffabaecaecb0bb8721ed606f5e078a15f77925e8b20ca8ce8ed022ea3cd19f
SHA512c2828e7cd15dda5e1870a890d9a7d5d8471d031dc455298b90c932dd0bf6a47cd52a32b2e6eb4b6b19d189d3713bfa9129d59bf99a130cbe4518e54400f25c72