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Analysis
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max time kernel
149s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
09/05/2024, 18:36
Behavioral task
behavioral1
Sample
2024-05-09_5987848d4f12dbc1af847e8710507f9a_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-09_5987848d4f12dbc1af847e8710507f9a_cryptolocker.exe
Resource
win10v2004-20240426-en
General
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Target
2024-05-09_5987848d4f12dbc1af847e8710507f9a_cryptolocker.exe
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Size
80KB
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MD5
5987848d4f12dbc1af847e8710507f9a
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SHA1
dc8c2c6261dd0ee7ebac3977fd830c388c98c58b
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SHA256
ec8814f17a5c354f529d3014f347b014dd18f3d53e6353fc3b689e673e974f50
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SHA512
a38a244ae8dadafb2c6d1f89c401f5e0e0e4b16f7703314bc4f9cf0a565e5561e23e78a9ee70758c3804429c0f8f81adc8f39e7cbe8aca49f6f17f917acec98d
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SSDEEP
1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdM:T6a+rdOOtEvwDpjNt2
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/4856-1-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000700000002327d-13.dat CryptoLocker_rule2 behavioral2/memory/3780-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4856-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3780-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/4856-1-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000700000002327d-13.dat CryptoLocker_set1 behavioral2/memory/3780-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4856-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/3780-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/4856-1-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000700000002327d-13.dat UPX behavioral2/memory/3780-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4856-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/3780-27-0x0000000000500000-0x0000000000510000-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-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation 2024-05-09_5987848d4f12dbc1af847e8710507f9a_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3780 asih.exe -
resource yara_rule behavioral2/memory/4856-1-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000700000002327d-13.dat upx behavioral2/memory/3780-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4856-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/3780-27-0x0000000000500000-0x0000000000510000-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 4856 wrote to memory of 3780 4856 2024-05-09_5987848d4f12dbc1af847e8710507f9a_cryptolocker.exe 82 PID 4856 wrote to memory of 3780 4856 2024-05-09_5987848d4f12dbc1af847e8710507f9a_cryptolocker.exe 82 PID 4856 wrote to memory of 3780 4856 2024-05-09_5987848d4f12dbc1af847e8710507f9a_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-09_5987848d4f12dbc1af847e8710507f9a_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-09_5987848d4f12dbc1af847e8710507f9a_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4856 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:3780
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
81KB
MD5416f6b4b829b6122d92caf97c82ae2c9
SHA1e645c3b5d1fb6f09a1882cea6524efa60a389f85
SHA2560677dc62a9b854038e6e0cd6ffefaca1155fd766714d3b1641a4129dec9b5167
SHA51203203927635b60d78daa32d3a7d64261b44876549bd519fc0b4ddd5f59a4c4946f3156fa43ca2ce894f7fe7a4ea863fdfd31fc0334b5103c2dc419482dc872ed