Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240221-en -
resource tags
arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system -
submitted
22-02-2024 14:26
Behavioral task
behavioral1
Sample
2024-02-22_f573f84032d60d651cb51c8edd79e9b1_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-02-22_f573f84032d60d651cb51c8edd79e9b1_cryptolocker.exe
Resource
win10v2004-20240221-en
General
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Target
2024-02-22_f573f84032d60d651cb51c8edd79e9b1_cryptolocker.exe
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Size
117KB
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MD5
f573f84032d60d651cb51c8edd79e9b1
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SHA1
d7931c5e4cca1cb78ba0fe39e59763f8a4a31a3e
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SHA256
fcd68ee11b8eeeec7da62a9b1437b39ee0fcf34c5c7cb1be18cfee093fe02284
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SHA512
d16d346a0a11d57aa5cd848da9a336a19a046a030f169130a99b5a990cd33c612930efe15c366e472a2b59682badb0cbc75c3912bf5f1a7af2a4e5ec92e63885
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SSDEEP
1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgp014:z6a+CdOOtEvwDpjczW
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/2036-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x00c300000001e848-13.dat CryptoLocker_rule2 behavioral2/memory/1900-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2036-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1900-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/2036-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x00c300000001e848-13.dat CryptoLocker_set1 behavioral2/memory/1900-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/2036-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/1900-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/2036-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x00c300000001e848-13.dat UPX behavioral2/memory/1900-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/2036-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/1900-27-0x0000000000500000-0x0000000000510000-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-1-5-21-2132103209-3755304320-2959162027-1000\Control Panel\International\Geo\Nation 2024-02-22_f573f84032d60d651cb51c8edd79e9b1_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 1900 asih.exe -
resource yara_rule behavioral2/memory/2036-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x00c300000001e848-13.dat upx behavioral2/memory/1900-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/2036-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/1900-27-0x0000000000500000-0x0000000000510000-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 2036 wrote to memory of 1900 2036 2024-02-22_f573f84032d60d651cb51c8edd79e9b1_cryptolocker.exe 89 PID 2036 wrote to memory of 1900 2036 2024-02-22_f573f84032d60d651cb51c8edd79e9b1_cryptolocker.exe 89 PID 2036 wrote to memory of 1900 2036 2024-02-22_f573f84032d60d651cb51c8edd79e9b1_cryptolocker.exe 89
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-22_f573f84032d60d651cb51c8edd79e9b1_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-22_f573f84032d60d651cb51c8edd79e9b1_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2036 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:1900
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
117KB
MD5d0f882cc98a99f379c31cfa729775dca
SHA19ec47d97faf6f9eb3684d7447eace869ec7ee4e8
SHA256787fdb2c082837a997cb91de0c0802b5f964c2b9ee3b3b4495f47cb654951de8
SHA5123738d68866e5f0b561521a3251963e66db9d3601e4582ab5e9956e18cac045452833930fdf5f06daf88f5cadb2cf4f93af722fe0bac8f9046fc66e5dd8a519dc