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Analysis
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max time kernel
134s -
max time network
125s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
23/05/2024, 21:14
Static task
static1
Behavioral task
behavioral1
Sample
fec56798464e65c834bad15ec9a2ffbd34e69753eb7c6992b08b4e8df31265ea.exe
Resource
win10v2004-20240426-en
General
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Target
fec56798464e65c834bad15ec9a2ffbd34e69753eb7c6992b08b4e8df31265ea.exe
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Size
2.4MB
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MD5
6e3af7040b6bb97e2ab45c5e4598a819
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SHA1
5b68709fad39133b529d37002e81233a8aff658d
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SHA256
fec56798464e65c834bad15ec9a2ffbd34e69753eb7c6992b08b4e8df31265ea
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SHA512
f93f04b334f51c3f9811cb70f4bdc9513d2359e36571349ad0ee248e58be3234050894a88779d52fb215b0fde1afa9210f84f1bde5b94681a3039c83ef4fdbc4
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SSDEEP
49152:jxIRJF1HL+VdX68kUKJtTF+TxMoxc1TU+j+dAzGwlrh:jEJF16dX68dKtIuoITsdZ
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 13 IoCs
resource yara_rule behavioral1/memory/3360-2-0x0000000004050000-0x0000000004199000-memory.dmp family_vidar_v7 behavioral1/memory/5008-4-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/5008-8-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/5008-10-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/5008-17-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/5008-18-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/5008-35-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/5008-36-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/5008-52-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/5008-53-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/5008-64-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/5008-65-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/5008-66-0x0000000000400000-0x0000000000646000-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.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation kat3930.tmp -
Executes dropped EXE 1 IoCs
pid Process 5008 kat3930.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
description pid Process procid_target PID 3360 set thread context of 5008 3360 fec56798464e65c834bad15ec9a2ffbd34e69753eb7c6992b08b4e8df31265ea.exe 84 -
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.
description ioc Process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat3930.tmp -
Delays execution with timeout.exe 1 IoCs
pid Process 5084 timeout.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 5008 kat3930.tmp 5008 kat3930.tmp 5008 kat3930.tmp 5008 kat3930.tmp -
Suspicious use of WriteProcessMemory 14 IoCs
description pid Process procid_target PID 3360 wrote to memory of 5008 3360 fec56798464e65c834bad15ec9a2ffbd34e69753eb7c6992b08b4e8df31265ea.exe 84 PID 3360 wrote to memory of 5008 3360 fec56798464e65c834bad15ec9a2ffbd34e69753eb7c6992b08b4e8df31265ea.exe 84 PID 3360 wrote to memory of 5008 3360 fec56798464e65c834bad15ec9a2ffbd34e69753eb7c6992b08b4e8df31265ea.exe 84 PID 3360 wrote to memory of 5008 3360 fec56798464e65c834bad15ec9a2ffbd34e69753eb7c6992b08b4e8df31265ea.exe 84 PID 3360 wrote to memory of 5008 3360 fec56798464e65c834bad15ec9a2ffbd34e69753eb7c6992b08b4e8df31265ea.exe 84 PID 3360 wrote to memory of 5008 3360 fec56798464e65c834bad15ec9a2ffbd34e69753eb7c6992b08b4e8df31265ea.exe 84 PID 3360 wrote to memory of 5008 3360 fec56798464e65c834bad15ec9a2ffbd34e69753eb7c6992b08b4e8df31265ea.exe 84 PID 3360 wrote to memory of 5008 3360 fec56798464e65c834bad15ec9a2ffbd34e69753eb7c6992b08b4e8df31265ea.exe 84 PID 5008 wrote to memory of 4980 5008 kat3930.tmp 98 PID 5008 wrote to memory of 4980 5008 kat3930.tmp 98 PID 5008 wrote to memory of 4980 5008 kat3930.tmp 98 PID 4980 wrote to memory of 5084 4980 cmd.exe 100 PID 4980 wrote to memory of 5084 4980 cmd.exe 100 PID 4980 wrote to memory of 5084 4980 cmd.exe 100
Processes
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C:\Users\Admin\AppData\Local\Temp\fec56798464e65c834bad15ec9a2ffbd34e69753eb7c6992b08b4e8df31265ea.exe"C:\Users\Admin\AppData\Local\Temp\fec56798464e65c834bad15ec9a2ffbd34e69753eb7c6992b08b4e8df31265ea.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3360 -
C:\Users\Admin\AppData\Local\Temp\kat3930.tmpC:\Users\Admin\AppData\Local\Temp\kat3930.tmp2⤵
- Checks computer location settings
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:5008 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat3930.tmp" & rd /s /q "C:\ProgramData\EGCBAFCFIJJJ" & exit3⤵
- Suspicious use of WriteProcessMemory
PID:4980 -
C:\Windows\SysWOW64\timeout.exetimeout /t 104⤵
- Delays execution with timeout.exe
PID:5084
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
861KB
MD566064dbdb70a5eb15ebf3bf65aba254b
SHA10284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA2566a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
SHA512b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f