Analysis
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max time kernel
91s -
max time network
123s -
platform
windows11-21h2_x64 -
resource
win11-20240508-en -
resource tags
arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system -
submitted
26-05-2024 09:38
Static task
static1
Behavioral task
behavioral1
Sample
f651b1e856e358c1857b12b28ce0b5d680a9def426a1bd639460674d6296ae12.exe
Resource
win10v2004-20240226-en
General
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Target
f651b1e856e358c1857b12b28ce0b5d680a9def426a1bd639460674d6296ae12.exe
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Size
2.0MB
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MD5
44fc0c80adf8c8b171ca1f9a263e55d0
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SHA1
b0a8db5c98505321e6bf439cd1616f58c115f15b
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SHA256
f651b1e856e358c1857b12b28ce0b5d680a9def426a1bd639460674d6296ae12
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SHA512
a87f006b4610369cb42dc4c1b8a65ce19fd1a31d3a3e1cf2e159ac79b347ef2760256853d5e47aa0114835f7e11e401b9be6604a4d44a3c49134d0cc6ae0475e
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SSDEEP
49152:s4K3x1vUWJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18WtIuoITsdZ
Malware Config
Extracted
stealc
Extracted
vidar
https://steamcommunity.com/profiles/76561199689717899
https://t.me/copterwin
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user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0
Signatures
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Detect Vidar Stealer 8 IoCs
Processes:
resource yara_rule behavioral2/memory/1408-1-0x0000000004070000-0x00000000041B9000-memory.dmp family_vidar_v7 behavioral2/memory/232-9-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral2/memory/232-4-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral2/memory/232-8-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral2/memory/232-19-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral2/memory/232-20-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral2/memory/232-37-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral2/memory/232-38-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 -
Downloads MZ/PE file
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Executes dropped EXE 1 IoCs
Processes:
kat75BC.tmppid process 232 kat75BC.tmp -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Suspicious use of SetThreadContext 1 IoCs
Processes:
f651b1e856e358c1857b12b28ce0b5d680a9def426a1bd639460674d6296ae12.exedescription pid process target process PID 1408 set thread context of 232 1408 f651b1e856e358c1857b12b28ce0b5d680a9def426a1bd639460674d6296ae12.exe kat75BC.tmp -
Checks processor information in registry 2 TTPs 1 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
kat75BC.tmpdescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat75BC.tmp -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
kat75BC.tmppid process 232 kat75BC.tmp 232 kat75BC.tmp -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
f651b1e856e358c1857b12b28ce0b5d680a9def426a1bd639460674d6296ae12.exedescription pid process target process PID 1408 wrote to memory of 232 1408 f651b1e856e358c1857b12b28ce0b5d680a9def426a1bd639460674d6296ae12.exe kat75BC.tmp PID 1408 wrote to memory of 232 1408 f651b1e856e358c1857b12b28ce0b5d680a9def426a1bd639460674d6296ae12.exe kat75BC.tmp PID 1408 wrote to memory of 232 1408 f651b1e856e358c1857b12b28ce0b5d680a9def426a1bd639460674d6296ae12.exe kat75BC.tmp PID 1408 wrote to memory of 232 1408 f651b1e856e358c1857b12b28ce0b5d680a9def426a1bd639460674d6296ae12.exe kat75BC.tmp PID 1408 wrote to memory of 232 1408 f651b1e856e358c1857b12b28ce0b5d680a9def426a1bd639460674d6296ae12.exe kat75BC.tmp PID 1408 wrote to memory of 232 1408 f651b1e856e358c1857b12b28ce0b5d680a9def426a1bd639460674d6296ae12.exe kat75BC.tmp PID 1408 wrote to memory of 232 1408 f651b1e856e358c1857b12b28ce0b5d680a9def426a1bd639460674d6296ae12.exe kat75BC.tmp PID 1408 wrote to memory of 232 1408 f651b1e856e358c1857b12b28ce0b5d680a9def426a1bd639460674d6296ae12.exe kat75BC.tmp
Processes
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C:\Users\Admin\AppData\Local\Temp\f651b1e856e358c1857b12b28ce0b5d680a9def426a1bd639460674d6296ae12.exe"C:\Users\Admin\AppData\Local\Temp\f651b1e856e358c1857b12b28ce0b5d680a9def426a1bd639460674d6296ae12.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\kat75BC.tmpC:\Users\Admin\AppData\Local\Temp\kat75BC.tmp2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\kat75BC.tmpFilesize
861KB
MD566064dbdb70a5eb15ebf3bf65aba254b
SHA10284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA2566a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
SHA512b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f
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memory/232-9-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/232-4-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/232-8-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/232-19-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/232-20-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/232-22-0x000000001B840000-0x000000001BA9F000-memory.dmpFilesize
2.4MB
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memory/232-37-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/232-38-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/1408-0-0x0000000002470000-0x0000000002471000-memory.dmpFilesize
4KB
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memory/1408-1-0x0000000004070000-0x00000000041B9000-memory.dmpFilesize
1.3MB
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memory/1408-10-0x0000000000400000-0x000000000060C000-memory.dmpFilesize
2.0MB