Analysis
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max time kernel
150s -
max time network
155s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
11/06/2024, 01:16
Behavioral task
behavioral1
Sample
2024-06-11_d5a46cfd3beb5e753bb64f9bbcc7e8ea_cryptolocker.exe
Resource
win7-20240419-en
Behavioral task
behavioral2
Sample
2024-06-11_d5a46cfd3beb5e753bb64f9bbcc7e8ea_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-11_d5a46cfd3beb5e753bb64f9bbcc7e8ea_cryptolocker.exe
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Size
91KB
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MD5
d5a46cfd3beb5e753bb64f9bbcc7e8ea
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SHA1
f06954774e4d45412a85c7a219ee5f72a438cbe0
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SHA256
642a937703929eb905b527336d2b6472d36837e462e3f58942608727896dd4b6
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SHA512
6148a3fc906fa10bc5d87e4f4c41ac378d3fe87b1235dbda341af380e11f18aa99284abdff24da4e677dcf4c2f2f50c05df128195dcf3669333fda84503aa40f
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SSDEEP
1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAA/LJ:n6a+1SEOtEvwDpjYYvQd2P2
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/3952-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x00090000000233ae-13.dat CryptoLocker_rule2 behavioral2/memory/3952-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4920-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/3952-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x00090000000233ae-13.dat CryptoLocker_set1 behavioral2/memory/3952-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4920-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/3952-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x00090000000233ae-13.dat UPX behavioral2/memory/3952-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4920-26-0x0000000000500000-0x0000000000510000-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-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation 2024-06-11_d5a46cfd3beb5e753bb64f9bbcc7e8ea_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4920 asih.exe -
resource yara_rule behavioral2/memory/3952-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x00090000000233ae-13.dat upx behavioral2/memory/3952-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4920-26-0x0000000000500000-0x0000000000510000-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 3952 wrote to memory of 4920 3952 2024-06-11_d5a46cfd3beb5e753bb64f9bbcc7e8ea_cryptolocker.exe 81 PID 3952 wrote to memory of 4920 3952 2024-06-11_d5a46cfd3beb5e753bb64f9bbcc7e8ea_cryptolocker.exe 81 PID 3952 wrote to memory of 4920 3952 2024-06-11_d5a46cfd3beb5e753bb64f9bbcc7e8ea_cryptolocker.exe 81
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-11_d5a46cfd3beb5e753bb64f9bbcc7e8ea_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-11_d5a46cfd3beb5e753bb64f9bbcc7e8ea_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3952 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4920
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
91KB
MD5873d54eda494371edd52d08b35902e35
SHA1be42732bc7482671616bbae9b0e267cf4f462c16
SHA256daec362e59234a4361adb73c6415ccc432a6a55d4b1ff91bc72a306c79f699a7
SHA512f8b63351a84b6e1351f93860793bb1ff984b0f4981e376ccdf9228061965c6601a326f4594460b6b37dea9953cca4911e7e6d8a867d4d2e196643faea43add9d