Analysis
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max time kernel
132s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
25-05-2024 22:25
Static task
static1
Behavioral task
behavioral1
Sample
c9cf740d898c146caf9717d3e5d780ac9893783ad65c79afbb1cbbf9da8f842e.exe
Resource
win10v2004-20240508-en
General
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Target
c9cf740d898c146caf9717d3e5d780ac9893783ad65c79afbb1cbbf9da8f842e.exe
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Size
2.0MB
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MD5
7f4a742a40f1cc8e7a4c4d2809216a31
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SHA1
46ceaca7732a7f693146de327c35631cdbaeeb22
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SHA256
c9cf740d898c146caf9717d3e5d780ac9893783ad65c79afbb1cbbf9da8f842e
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SHA512
b5f444949e8348fc96d84f86fb9c405f8ecb9e9b1d5f308bf3666944bda917ab843071b9cf898d9eafd73a2caa28944d19bee6708048c6ecb013d0ba2b243c0b
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SSDEEP
49152:s4K3x1vUKJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18KtIuoITsdZ
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 behavioral1/memory/2060-1-0x0000000004030000-0x0000000004179000-memory.dmp family_vidar_v7 behavioral1/memory/3140-4-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/3140-8-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/3140-9-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/3140-14-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/3140-15-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/3140-32-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/3140-33-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/3140-49-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/3140-50-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/3140-61-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/3140-62-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/3140-63-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/3140-66-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 -
Downloads MZ/PE file
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
kat4575.tmpdescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation kat4575.tmp -
Executes dropped EXE 1 IoCs
Processes:
kat4575.tmppid process 3140 kat4575.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:
c9cf740d898c146caf9717d3e5d780ac9893783ad65c79afbb1cbbf9da8f842e.exedescription pid process target process PID 2060 set thread context of 3140 2060 c9cf740d898c146caf9717d3e5d780ac9893783ad65c79afbb1cbbf9da8f842e.exe kat4575.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:
kat4575.tmpdescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat4575.tmp -
Delays execution with timeout.exe 1 IoCs
Processes:
timeout.exepid process 1544 timeout.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
kat4575.tmppid process 3140 kat4575.tmp 3140 kat4575.tmp 3140 kat4575.tmp 3140 kat4575.tmp -
Suspicious use of WriteProcessMemory 14 IoCs
Processes:
c9cf740d898c146caf9717d3e5d780ac9893783ad65c79afbb1cbbf9da8f842e.exekat4575.tmpcmd.exedescription pid process target process PID 2060 wrote to memory of 3140 2060 c9cf740d898c146caf9717d3e5d780ac9893783ad65c79afbb1cbbf9da8f842e.exe kat4575.tmp PID 2060 wrote to memory of 3140 2060 c9cf740d898c146caf9717d3e5d780ac9893783ad65c79afbb1cbbf9da8f842e.exe kat4575.tmp PID 2060 wrote to memory of 3140 2060 c9cf740d898c146caf9717d3e5d780ac9893783ad65c79afbb1cbbf9da8f842e.exe kat4575.tmp PID 2060 wrote to memory of 3140 2060 c9cf740d898c146caf9717d3e5d780ac9893783ad65c79afbb1cbbf9da8f842e.exe kat4575.tmp PID 2060 wrote to memory of 3140 2060 c9cf740d898c146caf9717d3e5d780ac9893783ad65c79afbb1cbbf9da8f842e.exe kat4575.tmp PID 2060 wrote to memory of 3140 2060 c9cf740d898c146caf9717d3e5d780ac9893783ad65c79afbb1cbbf9da8f842e.exe kat4575.tmp PID 2060 wrote to memory of 3140 2060 c9cf740d898c146caf9717d3e5d780ac9893783ad65c79afbb1cbbf9da8f842e.exe kat4575.tmp PID 2060 wrote to memory of 3140 2060 c9cf740d898c146caf9717d3e5d780ac9893783ad65c79afbb1cbbf9da8f842e.exe kat4575.tmp PID 3140 wrote to memory of 1904 3140 kat4575.tmp cmd.exe PID 3140 wrote to memory of 1904 3140 kat4575.tmp cmd.exe PID 3140 wrote to memory of 1904 3140 kat4575.tmp cmd.exe PID 1904 wrote to memory of 1544 1904 cmd.exe timeout.exe PID 1904 wrote to memory of 1544 1904 cmd.exe timeout.exe PID 1904 wrote to memory of 1544 1904 cmd.exe timeout.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\c9cf740d898c146caf9717d3e5d780ac9893783ad65c79afbb1cbbf9da8f842e.exe"C:\Users\Admin\AppData\Local\Temp\c9cf740d898c146caf9717d3e5d780ac9893783ad65c79afbb1cbbf9da8f842e.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\kat4575.tmpC:\Users\Admin\AppData\Local\Temp\kat4575.tmp2⤵
- Checks computer location settings
- 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\kat4575.tmp" & rd /s /q "C:\ProgramData\HCAEHJJKFCAA" & 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\kat4575.tmpFilesize
861KB
MD566064dbdb70a5eb15ebf3bf65aba254b
SHA10284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA2566a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
SHA512b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f
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memory/2060-10-0x0000000000400000-0x000000000060C000-memory.dmpFilesize
2.0MB
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memory/2060-1-0x0000000004030000-0x0000000004179000-memory.dmpFilesize
1.3MB
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memory/2060-0-0x0000000002240000-0x0000000002241000-memory.dmpFilesize
4KB
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memory/3140-15-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/3140-33-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/3140-9-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/3140-14-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/3140-4-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/3140-17-0x000000001B720000-0x000000001B97F000-memory.dmpFilesize
2.4MB
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memory/3140-32-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/3140-8-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/3140-49-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/3140-50-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/3140-61-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/3140-62-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/3140-63-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/3140-66-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB