Analysis
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max time kernel
148s -
max time network
149s -
platform
windows7_x64 -
resource
win7-20240508-en -
resource tags
arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system -
submitted
12/05/2024, 18:33
Behavioral task
behavioral1
Sample
2024-05-12_a789a323eba6ae1a9548843cf5b89f59_cryptolocker.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-05-12_a789a323eba6ae1a9548843cf5b89f59_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-12_a789a323eba6ae1a9548843cf5b89f59_cryptolocker.exe
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Size
77KB
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MD5
a789a323eba6ae1a9548843cf5b89f59
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SHA1
0fb03c9ef279d786ec0b7fb100f7dba8fdf35525
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SHA256
f1ff3af30819a291305660aa2e0b1e4082302df33f064c22d91ff398b4a58abe
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SHA512
3222c4277252ad9de7dea288fa225b5929da4f62abc77563afa34fac3f40ff46eb10729a21d07b2dd3fa90ced2355a35722d094a75a65bc6bce4da6ffd2f93e9
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SSDEEP
1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdxPUxB1u:T6a+rdOOtEvwDpjNtHPp
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral1/memory/2232-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/files/0x000f00000001214d-11.dat CryptoLocker_rule2 behavioral1/memory/2232-15-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/memory/3004-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/memory/3004-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral1/memory/2232-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/files/0x000f00000001214d-11.dat CryptoLocker_set1 behavioral1/memory/2232-15-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/memory/3004-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/memory/3004-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral1/memory/2232-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/files/0x000f00000001214d-11.dat UPX behavioral1/memory/2232-15-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/memory/3004-16-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/memory/3004-26-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
Executes dropped EXE 1 IoCs
pid Process 3004 asih.exe -
Loads dropped DLL 1 IoCs
pid Process 2232 2024-05-12_a789a323eba6ae1a9548843cf5b89f59_cryptolocker.exe -
resource yara_rule behavioral1/memory/2232-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/files/0x000f00000001214d-11.dat upx behavioral1/memory/2232-15-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/memory/3004-16-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/memory/3004-26-0x0000000000500000-0x0000000000510000-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 4 IoCs
description pid Process procid_target PID 2232 wrote to memory of 3004 2232 2024-05-12_a789a323eba6ae1a9548843cf5b89f59_cryptolocker.exe 28 PID 2232 wrote to memory of 3004 2232 2024-05-12_a789a323eba6ae1a9548843cf5b89f59_cryptolocker.exe 28 PID 2232 wrote to memory of 3004 2232 2024-05-12_a789a323eba6ae1a9548843cf5b89f59_cryptolocker.exe 28 PID 2232 wrote to memory of 3004 2232 2024-05-12_a789a323eba6ae1a9548843cf5b89f59_cryptolocker.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-12_a789a323eba6ae1a9548843cf5b89f59_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-12_a789a323eba6ae1a9548843cf5b89f59_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2232 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:3004
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
77KB
MD5265965d1542d2d13f7d9ce358449b399
SHA1506912af87ad2f0dbb987f959b75e73609f60d9e
SHA256cf297f8825ba6e36c8d599ed78e7efe5abbabcc79413c3b3af7989b85a781654
SHA51242bccfcbb494314f2b8126c15d5b98f8937a192c67ff6a58151247700471abebc360d65c1437a16461217fc72cc94766374e1edf26a6f7bd153f8eb4b7ebcf48