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Analysis
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max time kernel
148s -
max time network
149s -
platform
windows7_x64 -
resource
win7-20231129-en -
resource tags
arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system -
submitted
30/04/2024, 02:52
Behavioral task
behavioral1
Sample
2024-04-30_a20b0bff9547a4cd3b07441c6e1f08eb_cryptolocker.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-04-30_a20b0bff9547a4cd3b07441c6e1f08eb_cryptolocker.exe
Resource
win10v2004-20240419-en
General
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Target
2024-04-30_a20b0bff9547a4cd3b07441c6e1f08eb_cryptolocker.exe
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Size
64KB
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MD5
a20b0bff9547a4cd3b07441c6e1f08eb
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SHA1
789e050005769a715b3b199c63a3dfc9aa2a1286
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SHA256
1285802afe2aa367443cf49cf03c7a11139d200e3fd2c9bb53457dd8b4152f4d
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SHA512
d51705967d47a1990efe3da01b5d952c5e3ca91bd2cff6105bb606c2cae0aafe88659a2c25d7006b7f74ed3e11fb0a33e9720db6fa2943ca825ed42d1e19d3a9
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SSDEEP
1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYibAo3:1nK6a+qdOOtEvwDpjZ
Malware Config
Signatures
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Detection of CryptoLocker Variants 6 IoCs
resource yara_rule behavioral1/memory/2784-0-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 behavioral1/files/0x00090000000141c0-11.dat CryptoLocker_rule2 behavioral1/memory/2784-12-0x00000000006D0000-0x00000000006E0000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2784-16-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 behavioral1/memory/3048-17-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 behavioral1/memory/3048-27-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 6 IoCs
resource yara_rule behavioral1/memory/2784-0-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 behavioral1/files/0x00090000000141c0-11.dat CryptoLocker_set1 behavioral1/memory/2784-12-0x00000000006D0000-0x00000000006E0000-memory.dmp CryptoLocker_set1 behavioral1/memory/2784-16-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 behavioral1/memory/3048-17-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 behavioral1/memory/3048-27-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 6 IoCs
resource yara_rule behavioral1/memory/2784-0-0x0000000000500000-0x000000000050F311-memory.dmp UPX behavioral1/files/0x00090000000141c0-11.dat UPX behavioral1/memory/2784-12-0x00000000006D0000-0x00000000006E0000-memory.dmp UPX behavioral1/memory/2784-16-0x0000000000500000-0x000000000050F311-memory.dmp UPX behavioral1/memory/3048-17-0x0000000000500000-0x000000000050F311-memory.dmp UPX behavioral1/memory/3048-27-0x0000000000500000-0x000000000050F311-memory.dmp UPX -
Executes dropped EXE 1 IoCs
pid Process 3048 asih.exe -
Loads dropped DLL 1 IoCs
pid Process 2784 2024-04-30_a20b0bff9547a4cd3b07441c6e1f08eb_cryptolocker.exe -
resource yara_rule behavioral1/memory/2784-0-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral1/files/0x00090000000141c0-11.dat upx behavioral1/memory/2784-12-0x00000000006D0000-0x00000000006E0000-memory.dmp upx behavioral1/memory/2784-16-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral1/memory/3048-17-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral1/memory/3048-27-0x0000000000500000-0x000000000050F311-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 4 IoCs
description pid Process procid_target PID 2784 wrote to memory of 3048 2784 2024-04-30_a20b0bff9547a4cd3b07441c6e1f08eb_cryptolocker.exe 28 PID 2784 wrote to memory of 3048 2784 2024-04-30_a20b0bff9547a4cd3b07441c6e1f08eb_cryptolocker.exe 28 PID 2784 wrote to memory of 3048 2784 2024-04-30_a20b0bff9547a4cd3b07441c6e1f08eb_cryptolocker.exe 28 PID 2784 wrote to memory of 3048 2784 2024-04-30_a20b0bff9547a4cd3b07441c6e1f08eb_cryptolocker.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-30_a20b0bff9547a4cd3b07441c6e1f08eb_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-30_a20b0bff9547a4cd3b07441c6e1f08eb_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2784 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:3048
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
64KB
MD5f215f8ab9b0fdda0bd7642e8f8862d64
SHA11687bb4cd949468f82d93698c11a2f3d4dbd71a7
SHA2563c15d787793a89c21becee9e05a36396f6568813bc0eed8f8276cc73b7c74c67
SHA51265a1f6f83452c7fc7bfa98e7becb5508734168f02f6b2be7958074cc5dadb6dde95c6d123708dec14fe24567363597195abb9645914ac8dc14627df46477c403