Analysis
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max time kernel
148s -
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
12-05-2024 14:37
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-12_8fcbdc78b725645ea2dd233fbdb1d487_cryptolocker.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-05-12_8fcbdc78b725645ea2dd233fbdb1d487_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-12_8fcbdc78b725645ea2dd233fbdb1d487_cryptolocker.exe
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Size
42KB
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MD5
8fcbdc78b725645ea2dd233fbdb1d487
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SHA1
7f4fc37a023000a6cc9c7844112cd79c94de3d23
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SHA256
4dc08a42f2508163c1b23ca983f6ee3aa5dd33f94bb8f01ef563f5c4962e5aa0
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SHA512
8dd3b8b023d54f9f3ebfe2239ad1c1006dfffb7f1c749c4770d2e1f7224a956803964967301876ecd5fe5ac567f43aa3543103cf1d6781b282297cc5f0007a6e
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SSDEEP
768:wHGGaSawqnwjRQ6ESlmFOsPoOdQtOOtEvwDpjm6WaJIOc+UPPEkL7vFO:YGzl5wjRQBBOsP1QMOtEvwDpjgarrkL8
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/2476-0-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0007000000023270-13.dat CryptoLocker_rule2 behavioral2/memory/868-18-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2476-17-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/2476-0-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_set1 behavioral2/files/0x0007000000023270-13.dat CryptoLocker_set1 behavioral2/memory/868-18-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_set1 behavioral2/memory/2476-17-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_set1 -
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 2024-05-12_8fcbdc78b725645ea2dd233fbdb1d487_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 868 asih.exe -
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 2476 wrote to memory of 868 2476 2024-05-12_8fcbdc78b725645ea2dd233fbdb1d487_cryptolocker.exe 82 PID 2476 wrote to memory of 868 2476 2024-05-12_8fcbdc78b725645ea2dd233fbdb1d487_cryptolocker.exe 82 PID 2476 wrote to memory of 868 2476 2024-05-12_8fcbdc78b725645ea2dd233fbdb1d487_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-12_8fcbdc78b725645ea2dd233fbdb1d487_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-12_8fcbdc78b725645ea2dd233fbdb1d487_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2476 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:868
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
42KB
MD53903f2347490837a15a26fdd5d5b7e17
SHA1951effdbd69e1315cf7626bd9ef890e1ab2a69d1
SHA25650d7285cb1cc2497c724a38cfb64747429b51d683fe88b0b00d918116ea8d85b
SHA512fb12c0744176f52ccdfcd3ec6057b77cccc92ada805088a8740913ef15cfcb5767bca10a3be2702e132fdea8304154d5274767d9ee4d4d49c2d3d2f57a6cee7b