Analysis
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max time kernel
150s -
max time network
155s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
12-02-2024 19:24
Behavioral task
behavioral1
Sample
2024-02-12_8dce09cf6130ccb84e7601f2d313b54b_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-12_8dce09cf6130ccb84e7601f2d313b54b_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-02-12_8dce09cf6130ccb84e7601f2d313b54b_cryptolocker.exe
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Size
117KB
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MD5
8dce09cf6130ccb84e7601f2d313b54b
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SHA1
d299a83a1052e087a4fe4af039aa45ea02a48a4a
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SHA256
e980ced23abd17baf84e4fc69618215acd930805fc85019193bfe56142116a1b
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SHA512
498899c0b9c6148e67eaaab5ebb65a03678191dad642a00b31eda196f1e0752f554df732d419369c4c0d738550a9ed012460b8a637fb4c0920002d06af1f73d5
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SSDEEP
1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgp01y:z6a+CdOOtEvwDpjczk
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
Processes:
resource yara_rule behavioral2/memory/3084-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_rule2 C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_rule2 behavioral2/memory/3084-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/436-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
Processes:
resource yara_rule behavioral2/memory/3084-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_set1 C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_set1 behavioral2/memory/3084-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/436-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
Processes:
resource yara_rule behavioral2/memory/3084-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX C:\Users\Admin\AppData\Local\Temp\asih.exe UPX C:\Users\Admin\AppData\Local\Temp\asih.exe UPX behavioral2/memory/3084-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/436-26-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
2024-02-12_8dce09cf6130ccb84e7601f2d313b54b_cryptolocker.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-2398549320-3657759451-817663969-1000\Control Panel\International\Geo\Nation 2024-02-12_8dce09cf6130ccb84e7601f2d313b54b_cryptolocker.exe -
Executes dropped EXE 1 IoCs
Processes:
asih.exepid process 436 asih.exe -
Processes:
resource yara_rule behavioral2/memory/3084-0-0x0000000000500000-0x0000000000510000-memory.dmp upx C:\Users\Admin\AppData\Local\Temp\asih.exe upx C:\Users\Admin\AppData\Local\Temp\asih.exe upx behavioral2/memory/3084-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/436-26-0x0000000000500000-0x0000000000510000-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
Processes:
2024-02-12_8dce09cf6130ccb84e7601f2d313b54b_cryptolocker.exedescription pid process target process PID 3084 wrote to memory of 436 3084 2024-02-12_8dce09cf6130ccb84e7601f2d313b54b_cryptolocker.exe asih.exe PID 3084 wrote to memory of 436 3084 2024-02-12_8dce09cf6130ccb84e7601f2d313b54b_cryptolocker.exe asih.exe PID 3084 wrote to memory of 436 3084 2024-02-12_8dce09cf6130ccb84e7601f2d313b54b_cryptolocker.exe asih.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-12_8dce09cf6130ccb84e7601f2d313b54b_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-12_8dce09cf6130ccb84e7601f2d313b54b_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3084 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:436
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
117KB
MD532bfdb76d1f92aa67570d0b41f47cf7e
SHA1483f3b67918911ef4dc092e50190019653dce06d
SHA25699c986c184791e0dc8540ecf50f576ca3a44ebcf2033c585641fcb04eed38c5e
SHA5124d0f7cf3c75ed5cb4c32e0dbc1d0639b967a62314ff8db652488debb4c76eff1a5164ace92c688582ece0175edb4149c697fd0fb6af57c23e11e06e2168577ac
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Filesize
64KB
MD5bbee9f54a911b9f52f6b0efe50aa5e6e
SHA14899c3fafc5dc2c084f4d45f75e57f9a585086bf
SHA2566f9617f96ac454a92fad304d802a68935d9a2488f822e80380553a0523cab6b3
SHA512bae856800c110c1f367521607877aaf4e9a2df1a7efa283c02aa09b0f98372da7bf41d9d891a2d24ed7ed258084e1d9714975967f6d8c4300950679e994734dc