Analysis
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max time kernel
146s -
max time network
150s -
platform
windows11-21h2_x64 -
resource
win11-20240419-en -
resource tags
arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system -
submitted
27-05-2024 04:22
Static task
static1
Behavioral task
behavioral1
Sample
81be9f936630ce74ce880862268ef9435ca6504f10d41afac1ad658c5f1c4da1.exe
Resource
win10v2004-20240426-en
General
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Target
81be9f936630ce74ce880862268ef9435ca6504f10d41afac1ad658c5f1c4da1.exe
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Size
2.0MB
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MD5
45b5d55effd212fd11e85008099854c7
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SHA1
b9e3fcec4742a0716b248bf3fc106c8c3f04a871
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SHA256
81be9f936630ce74ce880862268ef9435ca6504f10d41afac1ad658c5f1c4da1
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SHA512
7758046e7dabf3796108460dc45c001575cd3d78e3c574acf7d2c18a1c3ec84151afef54c9b035f4702d3f5f7411401d0be16c7ae42a58f8bcf1240016073cb3
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SSDEEP
49152:OePpQEtJtTF+TxMoxc1TU+j+dAzGwlrh:OePpQEttIuoITsdZ
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/3116-2-0x0000000004040000-0x0000000004189000-memory.dmp family_vidar_v7 behavioral2/memory/3056-8-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral2/memory/3056-10-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral2/memory/3056-4-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral2/memory/3056-16-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral2/memory/3056-17-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral2/memory/3056-34-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral2/memory/3056-35-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 -
Downloads MZ/PE file
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Executes dropped EXE 1 IoCs
Processes:
kat539E.tmppid process 3056 kat539E.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:
81be9f936630ce74ce880862268ef9435ca6504f10d41afac1ad658c5f1c4da1.exedescription pid process target process PID 3116 set thread context of 3056 3116 81be9f936630ce74ce880862268ef9435ca6504f10d41afac1ad658c5f1c4da1.exe kat539E.tmp -
Checks processor information in registry 2 TTPs 1 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
kat539E.tmpdescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat539E.tmp -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
kat539E.tmppid process 3056 kat539E.tmp 3056 kat539E.tmp -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
81be9f936630ce74ce880862268ef9435ca6504f10d41afac1ad658c5f1c4da1.exedescription pid process target process PID 3116 wrote to memory of 3056 3116 81be9f936630ce74ce880862268ef9435ca6504f10d41afac1ad658c5f1c4da1.exe kat539E.tmp PID 3116 wrote to memory of 3056 3116 81be9f936630ce74ce880862268ef9435ca6504f10d41afac1ad658c5f1c4da1.exe kat539E.tmp PID 3116 wrote to memory of 3056 3116 81be9f936630ce74ce880862268ef9435ca6504f10d41afac1ad658c5f1c4da1.exe kat539E.tmp PID 3116 wrote to memory of 3056 3116 81be9f936630ce74ce880862268ef9435ca6504f10d41afac1ad658c5f1c4da1.exe kat539E.tmp PID 3116 wrote to memory of 3056 3116 81be9f936630ce74ce880862268ef9435ca6504f10d41afac1ad658c5f1c4da1.exe kat539E.tmp PID 3116 wrote to memory of 3056 3116 81be9f936630ce74ce880862268ef9435ca6504f10d41afac1ad658c5f1c4da1.exe kat539E.tmp PID 3116 wrote to memory of 3056 3116 81be9f936630ce74ce880862268ef9435ca6504f10d41afac1ad658c5f1c4da1.exe kat539E.tmp PID 3116 wrote to memory of 3056 3116 81be9f936630ce74ce880862268ef9435ca6504f10d41afac1ad658c5f1c4da1.exe kat539E.tmp
Processes
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C:\Users\Admin\AppData\Local\Temp\81be9f936630ce74ce880862268ef9435ca6504f10d41afac1ad658c5f1c4da1.exe"C:\Users\Admin\AppData\Local\Temp\81be9f936630ce74ce880862268ef9435ca6504f10d41afac1ad658c5f1c4da1.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\kat539E.tmpC:\Users\Admin\AppData\Local\Temp\kat539E.tmp2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Temp\kat539E.tmpFilesize
861KB
MD566064dbdb70a5eb15ebf3bf65aba254b
SHA10284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA2566a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
SHA512b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f
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memory/3056-8-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/3056-10-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/3056-4-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/3056-16-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/3056-17-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/3056-20-0x000000001B7E0000-0x000000001BA3F000-memory.dmpFilesize
2.4MB
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memory/3056-34-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/3056-35-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/3116-0-0x0000000002380000-0x0000000002381000-memory.dmpFilesize
4KB
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memory/3116-2-0x0000000004040000-0x0000000004189000-memory.dmpFilesize
1.3MB
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memory/3116-9-0x0000000000400000-0x0000000000612000-memory.dmpFilesize
2.1MB