Analysis
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max time kernel
148s -
max time network
148s -
platform
windows7_x64 -
resource
win7-20240419-en -
resource tags
arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system -
submitted
24-05-2024 04:10
Behavioral task
behavioral1
Sample
2024-05-24_e5b89afc04cfcf4705fe14eef1fd30d1_cryptolocker.exe
Resource
win7-20240419-en
Behavioral task
behavioral2
Sample
2024-05-24_e5b89afc04cfcf4705fe14eef1fd30d1_cryptolocker.exe
Resource
win10v2004-20240426-en
General
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Target
2024-05-24_e5b89afc04cfcf4705fe14eef1fd30d1_cryptolocker.exe
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Size
60KB
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MD5
e5b89afc04cfcf4705fe14eef1fd30d1
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SHA1
1226299b21746d200d19fc570033d51be56ba628
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SHA256
71bde2e7e9e9c0095de88257ad615f5a50d91f4e188c7549b4362c82fd732fd5
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SHA512
019cd2eedc3467cdd958a7c0549c39c1593a71e7b58105702347ae944bb81b4f29564cd3426a71065cc31da82bc90a6c7b1fab5155f594a49e975fb396d41a20
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SSDEEP
1536:z6QFElP6n+gKmddpMOtEvwDpj9aYaUf3j:z6a+CdOOtEvwDpjQo
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
Processes:
resource yara_rule behavioral1/memory/1148-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 \Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_rule2 behavioral1/memory/2096-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/memory/1148-15-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2096-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
Processes:
resource yara_rule behavioral1/memory/1148-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 \Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_set1 behavioral1/memory/2096-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/memory/1148-15-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/memory/2096-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
Processes:
resource yara_rule behavioral1/memory/1148-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX \Users\Admin\AppData\Local\Temp\asih.exe UPX behavioral1/memory/2096-16-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/memory/1148-15-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/memory/2096-26-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
Executes dropped EXE 1 IoCs
Processes:
asih.exepid process 2096 asih.exe -
Loads dropped DLL 1 IoCs
Processes:
2024-05-24_e5b89afc04cfcf4705fe14eef1fd30d1_cryptolocker.exepid process 1148 2024-05-24_e5b89afc04cfcf4705fe14eef1fd30d1_cryptolocker.exe -
Processes:
resource yara_rule behavioral1/memory/1148-0-0x0000000000500000-0x0000000000510000-memory.dmp upx \Users\Admin\AppData\Local\Temp\asih.exe upx behavioral1/memory/2096-16-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/memory/1148-15-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/memory/2096-26-0x0000000000500000-0x0000000000510000-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
Processes:
2024-05-24_e5b89afc04cfcf4705fe14eef1fd30d1_cryptolocker.exedescription pid process target process PID 1148 wrote to memory of 2096 1148 2024-05-24_e5b89afc04cfcf4705fe14eef1fd30d1_cryptolocker.exe asih.exe PID 1148 wrote to memory of 2096 1148 2024-05-24_e5b89afc04cfcf4705fe14eef1fd30d1_cryptolocker.exe asih.exe PID 1148 wrote to memory of 2096 1148 2024-05-24_e5b89afc04cfcf4705fe14eef1fd30d1_cryptolocker.exe asih.exe PID 1148 wrote to memory of 2096 1148 2024-05-24_e5b89afc04cfcf4705fe14eef1fd30d1_cryptolocker.exe asih.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-24_e5b89afc04cfcf4705fe14eef1fd30d1_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-24_e5b89afc04cfcf4705fe14eef1fd30d1_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1148 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2096
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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\Users\Admin\AppData\Local\Temp\asih.exeFilesize
60KB
MD5ae3fba5d4043d19804bd6b186b145469
SHA1a34404bbbb9d897d85cec504e2da32b1542d71f3
SHA256bb3ee86fab2b695021b82c955e4f46ddc68dc0351118cad6334b5c4e65733649
SHA512eb9be1609aca906c785e39e39d1b0f3349628978ed37136bc083e907a06e15dd8f374d996b0c8e29af9ee5da2ad8a86b5e8bdf3dd4f7c6772bbb806aa171a847
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memory/1148-0-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB
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memory/1148-2-0x0000000000480000-0x0000000000486000-memory.dmpFilesize
24KB
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memory/1148-9-0x0000000000240000-0x0000000000246000-memory.dmpFilesize
24KB
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memory/1148-1-0x0000000000240000-0x0000000000246000-memory.dmpFilesize
24KB
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memory/1148-15-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB
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memory/2096-16-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB
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memory/2096-18-0x0000000000340000-0x0000000000346000-memory.dmpFilesize
24KB
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memory/2096-25-0x00000000002C0000-0x00000000002C6000-memory.dmpFilesize
24KB
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memory/2096-26-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB