Analysis
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max time kernel
146s -
max time network
155s -
platform
windows11-21h2_x64 -
resource
win11-20240508-en -
resource tags
arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system -
submitted
01-07-2024 00:46
Static task
static1
Behavioral task
behavioral1
Sample
efb7b314abe4685b34f532a5def003fea614dea854f831331ea5b053efad9c17.exe
Resource
win10v2004-20240508-en
General
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Target
efb7b314abe4685b34f532a5def003fea614dea854f831331ea5b053efad9c17.exe
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Size
2.2MB
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MD5
71aba2cd262ea7ad762dfbd892ffe50e
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SHA1
ae2add19b4685f9f27bbe9c66551b60008cf7c7a
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SHA256
efb7b314abe4685b34f532a5def003fea614dea854f831331ea5b053efad9c17
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SHA512
b7478c2fd9f8cf98fe768b567a51ad4b89e8b89d9781023fb0dd3c6198f93622f2716cbdfb83344d3fb4b7ee0daa79953629c580bbd2c91a03ffb9d47bef3173
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SSDEEP
24576:Uc0PyhhGkCI1wUL24jtYkYGbawg757CgXueAgXvmU2MZQti1u8LnsDJY6WpEYGYG:UJ0hsA91MPN21tuuIeNHYGY0LzjsJxK
Malware Config
Extracted
vidar
https://t.me/g067n
https://steamcommunity.com/profiles/76561199707802586
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user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:129.0) Gecko/20100101 Firefox/129.0
Signatures
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Detect Vidar Stealer 9 IoCs
Processes:
resource yara_rule behavioral2/memory/3840-2-0x0000000004220000-0x0000000004333000-memory.dmp family_vidar_v7 behavioral2/memory/4472-8-0x0000000000400000-0x0000000000648000-memory.dmp family_vidar_v7 behavioral2/memory/4472-10-0x0000000000400000-0x0000000000648000-memory.dmp family_vidar_v7 behavioral2/memory/4472-4-0x0000000000400000-0x0000000000648000-memory.dmp family_vidar_v7 behavioral2/memory/4472-11-0x0000000000400000-0x0000000000648000-memory.dmp family_vidar_v7 behavioral2/memory/4472-12-0x0000000000400000-0x0000000000648000-memory.dmp family_vidar_v7 behavioral2/memory/4472-13-0x0000000000400000-0x0000000000648000-memory.dmp family_vidar_v7 behavioral2/memory/4472-14-0x0000000000400000-0x0000000000648000-memory.dmp family_vidar_v7 behavioral2/memory/4472-15-0x0000000000400000-0x0000000000648000-memory.dmp family_vidar_v7 -
Executes dropped EXE 1 IoCs
Processes:
kat735B.tmppid process 4472 kat735B.tmp -
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
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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:
efb7b314abe4685b34f532a5def003fea614dea854f831331ea5b053efad9c17.exedescription pid process target process PID 3840 set thread context of 4472 3840 efb7b314abe4685b34f532a5def003fea614dea854f831331ea5b053efad9c17.exe kat735B.tmp -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
kat735B.tmpdescription ioc process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 kat735B.tmp Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat735B.tmp -
Delays execution with timeout.exe 1 IoCs
Processes:
timeout.exepid process 4876 timeout.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
Processes:
kat735B.tmppid process 4472 kat735B.tmp 4472 kat735B.tmp 4472 kat735B.tmp 4472 kat735B.tmp 4472 kat735B.tmp 4472 kat735B.tmp -
Suspicious use of WriteProcessMemory 14 IoCs
Processes:
efb7b314abe4685b34f532a5def003fea614dea854f831331ea5b053efad9c17.exekat735B.tmpcmd.exedescription pid process target process PID 3840 wrote to memory of 4472 3840 efb7b314abe4685b34f532a5def003fea614dea854f831331ea5b053efad9c17.exe kat735B.tmp PID 3840 wrote to memory of 4472 3840 efb7b314abe4685b34f532a5def003fea614dea854f831331ea5b053efad9c17.exe kat735B.tmp PID 3840 wrote to memory of 4472 3840 efb7b314abe4685b34f532a5def003fea614dea854f831331ea5b053efad9c17.exe kat735B.tmp PID 3840 wrote to memory of 4472 3840 efb7b314abe4685b34f532a5def003fea614dea854f831331ea5b053efad9c17.exe kat735B.tmp PID 3840 wrote to memory of 4472 3840 efb7b314abe4685b34f532a5def003fea614dea854f831331ea5b053efad9c17.exe kat735B.tmp PID 3840 wrote to memory of 4472 3840 efb7b314abe4685b34f532a5def003fea614dea854f831331ea5b053efad9c17.exe kat735B.tmp PID 3840 wrote to memory of 4472 3840 efb7b314abe4685b34f532a5def003fea614dea854f831331ea5b053efad9c17.exe kat735B.tmp PID 3840 wrote to memory of 4472 3840 efb7b314abe4685b34f532a5def003fea614dea854f831331ea5b053efad9c17.exe kat735B.tmp PID 4472 wrote to memory of 976 4472 kat735B.tmp cmd.exe PID 4472 wrote to memory of 976 4472 kat735B.tmp cmd.exe PID 4472 wrote to memory of 976 4472 kat735B.tmp cmd.exe PID 976 wrote to memory of 4876 976 cmd.exe timeout.exe PID 976 wrote to memory of 4876 976 cmd.exe timeout.exe PID 976 wrote to memory of 4876 976 cmd.exe timeout.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\efb7b314abe4685b34f532a5def003fea614dea854f831331ea5b053efad9c17.exe"C:\Users\Admin\AppData\Local\Temp\efb7b314abe4685b34f532a5def003fea614dea854f831331ea5b053efad9c17.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\kat735B.tmpC:\Users\Admin\AppData\Local\Temp\kat735B.tmp2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat735B.tmp" & rd /s /q "C:\ProgramData\KFIIJJJDGCBA" & exit3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\timeout.exetimeout /t 104⤵
- Delays execution with timeout.exe
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\kat735B.tmpFilesize
861KB
MD566064dbdb70a5eb15ebf3bf65aba254b
SHA10284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA2566a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
SHA512b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f
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memory/3840-0-0x00000000024E0000-0x00000000024E1000-memory.dmpFilesize
4KB
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memory/3840-2-0x0000000004220000-0x0000000004333000-memory.dmpFilesize
1.1MB
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memory/3840-9-0x0000000000400000-0x0000000000641000-memory.dmpFilesize
2.3MB
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memory/4472-8-0x0000000000400000-0x0000000000648000-memory.dmpFilesize
2.3MB
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memory/4472-10-0x0000000000400000-0x0000000000648000-memory.dmpFilesize
2.3MB
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memory/4472-4-0x0000000000400000-0x0000000000648000-memory.dmpFilesize
2.3MB
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memory/4472-11-0x0000000000400000-0x0000000000648000-memory.dmpFilesize
2.3MB
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memory/4472-12-0x0000000000400000-0x0000000000648000-memory.dmpFilesize
2.3MB
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memory/4472-13-0x0000000000400000-0x0000000000648000-memory.dmpFilesize
2.3MB
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memory/4472-14-0x0000000000400000-0x0000000000648000-memory.dmpFilesize
2.3MB
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memory/4472-15-0x0000000000400000-0x0000000000648000-memory.dmpFilesize
2.3MB