Analysis
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max time kernel
150s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
10/06/2024, 21:41
Behavioral task
behavioral1
Sample
2024-06-10_d3c2c74b97abb84ad66f2b6fbd21012a_cryptolocker.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-06-10_d3c2c74b97abb84ad66f2b6fbd21012a_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-10_d3c2c74b97abb84ad66f2b6fbd21012a_cryptolocker.exe
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Size
80KB
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MD5
d3c2c74b97abb84ad66f2b6fbd21012a
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SHA1
6285be851df8afc7070c6833ed73187fa01326fa
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SHA256
ae4874c36d7efe3ca054ae6cbbcc7c3725fe9aa8c3a76e113edce4d46585d0fd
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SHA512
a93a0d2f3d9b1275d8b104e6b180065e8294b9597871a532fe36b947e40ff5c2c351f5ab66b53acbd121aef014878f8b04a2fa45e1c50073982d3656cb004913
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SSDEEP
1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdJcRhX:T6a+rdOOtEvwDpjNts
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/1392-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0008000000022f51-13.dat CryptoLocker_rule2 behavioral2/memory/4052-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1392-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4052-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/1392-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x0008000000022f51-13.dat CryptoLocker_set1 behavioral2/memory/4052-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/1392-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4052-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/1392-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x0008000000022f51-13.dat UPX behavioral2/memory/4052-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/1392-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4052-27-0x0000000000500000-0x0000000000510000-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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation 2024-06-10_d3c2c74b97abb84ad66f2b6fbd21012a_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4052 asih.exe -
resource yara_rule behavioral2/memory/1392-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x0008000000022f51-13.dat upx behavioral2/memory/4052-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/1392-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4052-27-0x0000000000500000-0x0000000000510000-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 1392 wrote to memory of 4052 1392 2024-06-10_d3c2c74b97abb84ad66f2b6fbd21012a_cryptolocker.exe 81 PID 1392 wrote to memory of 4052 1392 2024-06-10_d3c2c74b97abb84ad66f2b6fbd21012a_cryptolocker.exe 81 PID 1392 wrote to memory of 4052 1392 2024-06-10_d3c2c74b97abb84ad66f2b6fbd21012a_cryptolocker.exe 81
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-10_d3c2c74b97abb84ad66f2b6fbd21012a_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-10_d3c2c74b97abb84ad66f2b6fbd21012a_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1392 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4052
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
80KB
MD52a17664ae543d63eccdcd70ddb2ba347
SHA1cf3ef05e703b0f648b099d017babd376a66ac711
SHA256abd869a36a7c4b5f81ccfa82646b9f4107eae7032466eedd9f614528c88d822c
SHA512311c2cb3ed7ac16849d222de7b8bc39a73fda51019ea2c934f53925931dec9143576a67bb6299db5a5f4925c667df1f2c85d227cb97322b74b63570a2c4beb0b