Analysis
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max time kernel
149s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
05/04/2024, 03:54
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-05_89cf91491d305781555592d4f68228a8_cryptolocker.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-04-05_89cf91491d305781555592d4f68228a8_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-04-05_89cf91491d305781555592d4f68228a8_cryptolocker.exe
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Size
50KB
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MD5
89cf91491d305781555592d4f68228a8
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SHA1
cfcba9f8b58dab0f12df116f547634b29353a55f
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SHA256
c50ea0625f9356f49d17ef48b01a14828b1630233267b8de0d1e3e8c21608e45
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SHA512
5acc4b1210bb74c614f23f409894ad5af1785a30a2776f4144a0f57de728b0861c4681d8601fcbadaab8d357ba4b912b9d6b4a89b50d528f43d662af703edd7b
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SSDEEP
768:79inqyNR/QtOOtEvwDpjBK/rJ+Nw8qn8pKIRa9:79mqyNhQMOtEvwDpjBxe8TpXRu
Malware Config
Signatures
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Detection of CryptoLocker Variants 3 IoCs
resource yara_rule behavioral2/memory/4460-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000800000002320a-13.dat CryptoLocker_rule2 behavioral2/memory/4460-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 3 IoCs
resource yara_rule behavioral2/memory/4460-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000800000002320a-13.dat CryptoLocker_set1 behavioral2/memory/4460-17-0x0000000000500000-0x000000000050F000-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-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation 2024-04-05_89cf91491d305781555592d4f68228a8_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3408 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 4460 wrote to memory of 3408 4460 2024-04-05_89cf91491d305781555592d4f68228a8_cryptolocker.exe 86 PID 4460 wrote to memory of 3408 4460 2024-04-05_89cf91491d305781555592d4f68228a8_cryptolocker.exe 86 PID 4460 wrote to memory of 3408 4460 2024-04-05_89cf91491d305781555592d4f68228a8_cryptolocker.exe 86
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-05_89cf91491d305781555592d4f68228a8_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-05_89cf91491d305781555592d4f68228a8_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4460 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:3408
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
51KB
MD55dbe627cd815592e69b487634a61daf4
SHA1ff5de99a5f8b0301540a3db2d74aab0094fd0861
SHA256f8921e6bc1aedcb10e75410a89718181468c6b08ffcb7fe7cab5a9d0c868ff4c
SHA5128d81ca60426842e530792e266daf10ba6d42c5a7d118b79db87a8d847fcff5cc9b27bd4555b582311d1ce72a7bdf1bf58a7ac29b5fe479677bb4cb8ddacb9fde