Analysis
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max time kernel
90s -
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
24-05-2024 23:20
Static task
static1
Behavioral task
behavioral1
Sample
f8d711402ede10788724d7665b5bd09c735a4dfbe54629b2d7af20a913a4a47b.exe
Resource
win10v2004-20240508-en
General
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Target
f8d711402ede10788724d7665b5bd09c735a4dfbe54629b2d7af20a913a4a47b.exe
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Size
2.0MB
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MD5
b01c4aa1e4528110ca5c728fde927111
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SHA1
0abb1681be2c5569c12c49c00dbcefa5d73f7ce7
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SHA256
f8d711402ede10788724d7665b5bd09c735a4dfbe54629b2d7af20a913a4a47b
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SHA512
49fea2b9fa6f4f125bbe5286d43dc7d69ec16b2df1fa2eea9b35f3950a64f68738245833ae1f03a7820caf4135ebae3bf7f911b65a5516eecf9e835693c5261b
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SSDEEP
49152:s4K3x1vUSJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18StIuoITsdZ
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 14 IoCs
Processes:
resource yara_rule behavioral2/memory/4036-4-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral2/memory/4036-8-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral2/memory/4036-9-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral2/memory/4864-3-0x0000000004130000-0x0000000004279000-memory.dmp family_vidar_v7 behavioral2/memory/4036-19-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral2/memory/4036-20-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral2/memory/4036-37-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral2/memory/4036-38-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral2/memory/4036-54-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral2/memory/4036-55-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral2/memory/4036-66-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral2/memory/4036-70-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral2/memory/4036-71-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral2/memory/4036-72-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 -
Downloads MZ/PE file
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Executes dropped EXE 1 IoCs
Processes:
kat5D43.tmppid process 4036 kat5D43.tmp -
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
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Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
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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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Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
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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:
f8d711402ede10788724d7665b5bd09c735a4dfbe54629b2d7af20a913a4a47b.exedescription pid process target process PID 4864 set thread context of 4036 4864 f8d711402ede10788724d7665b5bd09c735a4dfbe54629b2d7af20a913a4a47b.exe kat5D43.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 1 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
kat5D43.tmpdescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat5D43.tmp -
Delays execution with timeout.exe 1 IoCs
Processes:
timeout.exepid process 4824 timeout.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
kat5D43.tmppid process 4036 kat5D43.tmp 4036 kat5D43.tmp 4036 kat5D43.tmp 4036 kat5D43.tmp -
Suspicious use of WriteProcessMemory 14 IoCs
Processes:
f8d711402ede10788724d7665b5bd09c735a4dfbe54629b2d7af20a913a4a47b.exekat5D43.tmpcmd.exedescription pid process target process PID 4864 wrote to memory of 4036 4864 f8d711402ede10788724d7665b5bd09c735a4dfbe54629b2d7af20a913a4a47b.exe kat5D43.tmp PID 4864 wrote to memory of 4036 4864 f8d711402ede10788724d7665b5bd09c735a4dfbe54629b2d7af20a913a4a47b.exe kat5D43.tmp PID 4864 wrote to memory of 4036 4864 f8d711402ede10788724d7665b5bd09c735a4dfbe54629b2d7af20a913a4a47b.exe kat5D43.tmp PID 4864 wrote to memory of 4036 4864 f8d711402ede10788724d7665b5bd09c735a4dfbe54629b2d7af20a913a4a47b.exe kat5D43.tmp PID 4864 wrote to memory of 4036 4864 f8d711402ede10788724d7665b5bd09c735a4dfbe54629b2d7af20a913a4a47b.exe kat5D43.tmp PID 4864 wrote to memory of 4036 4864 f8d711402ede10788724d7665b5bd09c735a4dfbe54629b2d7af20a913a4a47b.exe kat5D43.tmp PID 4864 wrote to memory of 4036 4864 f8d711402ede10788724d7665b5bd09c735a4dfbe54629b2d7af20a913a4a47b.exe kat5D43.tmp PID 4864 wrote to memory of 4036 4864 f8d711402ede10788724d7665b5bd09c735a4dfbe54629b2d7af20a913a4a47b.exe kat5D43.tmp PID 4036 wrote to memory of 2708 4036 kat5D43.tmp cmd.exe PID 4036 wrote to memory of 2708 4036 kat5D43.tmp cmd.exe PID 4036 wrote to memory of 2708 4036 kat5D43.tmp cmd.exe PID 2708 wrote to memory of 4824 2708 cmd.exe timeout.exe PID 2708 wrote to memory of 4824 2708 cmd.exe timeout.exe PID 2708 wrote to memory of 4824 2708 cmd.exe timeout.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\f8d711402ede10788724d7665b5bd09c735a4dfbe54629b2d7af20a913a4a47b.exe"C:\Users\Admin\AppData\Local\Temp\f8d711402ede10788724d7665b5bd09c735a4dfbe54629b2d7af20a913a4a47b.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\kat5D43.tmpC:\Users\Admin\AppData\Local\Temp\kat5D43.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\kat5D43.tmp" & rd /s /q "C:\ProgramData\KJKJKFCBKKJD" & 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
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Temp\kat5D43.tmpFilesize
861KB
MD566064dbdb70a5eb15ebf3bf65aba254b
SHA10284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA2566a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
SHA512b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f
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memory/4036-54-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/4036-66-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/4036-22-0x0000000026040000-0x000000002629F000-memory.dmpFilesize
2.4MB
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memory/4036-72-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/4036-37-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/4036-71-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/4036-19-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/4036-38-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/4036-9-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/4036-4-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/4036-20-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/4036-70-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/4036-55-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/4036-8-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/4864-0-0x0000000002360000-0x0000000002361000-memory.dmpFilesize
4KB
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memory/4864-10-0x0000000000400000-0x000000000060C000-memory.dmpFilesize
2.0MB
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memory/4864-3-0x0000000004130000-0x0000000004279000-memory.dmpFilesize
1.3MB