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
08-06-2024 23:31
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-08_b95533c1bede604f8df9e48e96a04812_cryptolocker.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-06-08_b95533c1bede604f8df9e48e96a04812_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-08_b95533c1bede604f8df9e48e96a04812_cryptolocker.exe
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Size
65KB
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MD5
b95533c1bede604f8df9e48e96a04812
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SHA1
33b2b6a9f851a6f6d79b81cab28af14b6e4f6d49
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SHA256
18b33d3d4351adb75415e8e722ad14358333b4cf0de1d2ace53524b8e232b3b2
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SHA512
ecab842b7400655a89167f80c9f9ef7056c49c906192f8379b81455a360d62ac8d2898a22635ce9981a3f7e5ed68d2b46734f5bb06e6553f961a787b7f5e94d2
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SSDEEP
1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsig:BbdDmjr+OtEvwDpjM85
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/5008-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000b00000002339a-13.dat CryptoLocker_rule2 behavioral2/memory/3120-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/5008-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3120-28-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 3 IoCs
resource yara_rule behavioral2/memory/3120-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/5008-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/3120-28-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/5008-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000b00000002339a-13.dat UPX behavioral2/memory/3120-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/5008-19-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/3120-28-0x0000000000500000-0x0000000000510000-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 2024-06-08_b95533c1bede604f8df9e48e96a04812_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3120 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 5008 wrote to memory of 3120 5008 2024-06-08_b95533c1bede604f8df9e48e96a04812_cryptolocker.exe 83 PID 5008 wrote to memory of 3120 5008 2024-06-08_b95533c1bede604f8df9e48e96a04812_cryptolocker.exe 83 PID 5008 wrote to memory of 3120 5008 2024-06-08_b95533c1bede604f8df9e48e96a04812_cryptolocker.exe 83
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-08_b95533c1bede604f8df9e48e96a04812_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-08_b95533c1bede604f8df9e48e96a04812_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5008 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:3120
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
65KB
MD5edbbff039ba098da4dcd8b1cb10bf6de
SHA1a78be51266f0d1c4ad88ba6405960e9e6890160e
SHA256a450a9ff3c8701f4403bc361b15bce6cc32c20796ce6045b518c45532d15586a
SHA51203bfbb095adea6f03a98e120c30db2e53b991437285e468b46c57e4864f53e25ee502cec37849f1f6f68e0faf993e2222ccabc9c07e1abb89f0ba62f3c62bd56