Analysis
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max time kernel
117s -
max time network
117s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system -
submitted
17/10/2024, 01:01
Static task
static1
Behavioral task
behavioral1
Sample
b4fb4635779ffd005dc23d9a661d459fec77b378acf66a03e52262ae0095e42dN.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
b4fb4635779ffd005dc23d9a661d459fec77b378acf66a03e52262ae0095e42dN.exe
Resource
win10v2004-20241007-en
General
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Target
b4fb4635779ffd005dc23d9a661d459fec77b378acf66a03e52262ae0095e42dN.exe
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Size
83KB
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MD5
60eafa19c7383f0fd224e93cafd94c70
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SHA1
cb1aa5f0b22273fb5912b9d6df076ed5e5ef631b
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SHA256
b4fb4635779ffd005dc23d9a661d459fec77b378acf66a03e52262ae0095e42d
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SHA512
058b00a1dfd6fbd9eca141eeb49c1f502ae599ca524f68fdd6c321309df7f2e0372d7f55e3cfb2122220226bdbba64460c2b0fc496df1cb0a3147c1a6588058d
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SSDEEP
768:qGHV45EDE477AZbUJx0rZGE3jCELoiMMj6hZ3nE+EXVmkDbjRL8Khc15Z6J1SkQ3:qG14P477AxUYrZGoC09k0SkTRHhWqPRU
Malware Config
Signatures
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Blocklisted process makes network request 4 IoCs
flow pid Process 5 2852 rundll32.exe 6 2852 rundll32.exe 7 2852 rundll32.exe 8 2852 rundll32.exe -
Deletes itself 1 IoCs
pid Process 592 snxkb.exe -
Executes dropped EXE 1 IoCs
pid Process 592 snxkb.exe -
Loads dropped DLL 4 IoCs
pid Process 2852 rundll32.exe 2852 rundll32.exe 2852 rundll32.exe 2852 rundll32.exe -
Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\rwxvf\\psbbvchfh.dll\",init" rundll32.exe -
Enumerates connected drives 3 TTPs 23 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
description ioc Process File opened (read-only) \??\a: rundll32.exe File opened (read-only) \??\g: rundll32.exe File opened (read-only) \??\x: rundll32.exe File opened (read-only) \??\o: rundll32.exe File opened (read-only) \??\q: rundll32.exe File opened (read-only) \??\s: rundll32.exe File opened (read-only) \??\t: rundll32.exe File opened (read-only) \??\v: rundll32.exe File opened (read-only) \??\b: rundll32.exe File opened (read-only) \??\h: rundll32.exe File opened (read-only) \??\m: rundll32.exe File opened (read-only) \??\w: rundll32.exe File opened (read-only) \??\y: rundll32.exe File opened (read-only) \??\u: rundll32.exe File opened (read-only) \??\z: rundll32.exe File opened (read-only) \??\i: rundll32.exe File opened (read-only) \??\k: rundll32.exe File opened (read-only) \??\p: rundll32.exe File opened (read-only) \??\n: rundll32.exe File opened (read-only) \??\r: rundll32.exe File opened (read-only) \??\e: rundll32.exe File opened (read-only) \??\j: rundll32.exe File opened (read-only) \??\l: rundll32.exe -
Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
description ioc Process File opened for modification \??\PHYSICALDRIVE0 rundll32.exe -
System Location Discovery: System Language Discovery 1 TTPs 5 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language b4fb4635779ffd005dc23d9a661d459fec77b378acf66a03e52262ae0095e42dN.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language PING.EXE Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language snxkb.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language rundll32.exe -
System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs
Adversaries may check for Internet connectivity on compromised systems.
pid Process 2848 cmd.exe 2808 PING.EXE -
Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString rundll32.exe -
Runs ping.exe 1 TTPs 1 IoCs
pid Process 2808 PING.EXE -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 2852 rundll32.exe 2852 rundll32.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 2852 rundll32.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 2164 b4fb4635779ffd005dc23d9a661d459fec77b378acf66a03e52262ae0095e42dN.exe 592 snxkb.exe -
Suspicious use of WriteProcessMemory 19 IoCs
description pid Process procid_target PID 2164 wrote to memory of 2848 2164 b4fb4635779ffd005dc23d9a661d459fec77b378acf66a03e52262ae0095e42dN.exe 30 PID 2164 wrote to memory of 2848 2164 b4fb4635779ffd005dc23d9a661d459fec77b378acf66a03e52262ae0095e42dN.exe 30 PID 2164 wrote to memory of 2848 2164 b4fb4635779ffd005dc23d9a661d459fec77b378acf66a03e52262ae0095e42dN.exe 30 PID 2164 wrote to memory of 2848 2164 b4fb4635779ffd005dc23d9a661d459fec77b378acf66a03e52262ae0095e42dN.exe 30 PID 2848 wrote to memory of 2808 2848 cmd.exe 32 PID 2848 wrote to memory of 2808 2848 cmd.exe 32 PID 2848 wrote to memory of 2808 2848 cmd.exe 32 PID 2848 wrote to memory of 2808 2848 cmd.exe 32 PID 2848 wrote to memory of 592 2848 cmd.exe 34 PID 2848 wrote to memory of 592 2848 cmd.exe 34 PID 2848 wrote to memory of 592 2848 cmd.exe 34 PID 2848 wrote to memory of 592 2848 cmd.exe 34 PID 592 wrote to memory of 2852 592 snxkb.exe 35 PID 592 wrote to memory of 2852 592 snxkb.exe 35 PID 592 wrote to memory of 2852 592 snxkb.exe 35 PID 592 wrote to memory of 2852 592 snxkb.exe 35 PID 592 wrote to memory of 2852 592 snxkb.exe 35 PID 592 wrote to memory of 2852 592 snxkb.exe 35 PID 592 wrote to memory of 2852 592 snxkb.exe 35
Processes
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C:\Users\Admin\AppData\Local\Temp\b4fb4635779ffd005dc23d9a661d459fec77b378acf66a03e52262ae0095e42dN.exe"C:\Users\Admin\AppData\Local\Temp\b4fb4635779ffd005dc23d9a661d459fec77b378acf66a03e52262ae0095e42dN.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2164 -
C:\Windows\SysWOW64\cmd.execmd.exe /c ping 127.0.0.1 -n 2&c:\snxkb.exe "C:\Users\Admin\AppData\Local\Temp\b4fb4635779ffd005dc23d9a661d459fec77b378acf66a03e52262ae0095e42dN.exe"2⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
- Suspicious use of WriteProcessMemory
PID:2848 -
C:\Windows\SysWOW64\PING.EXEping 127.0.0.1 -n 23⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
- Runs ping.exe
PID:2808
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\??\c:\snxkb.exec:\snxkb.exe "C:\Users\Admin\AppData\Local\Temp\b4fb4635779ffd005dc23d9a661d459fec77b378acf66a03e52262ae0095e42dN.exe"3⤵
- Deletes itself
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:592 -
\??\c:\windows\SysWOW64\rundll32.exec:\windows\system32\rundll32.exe "c:\rwxvf\psbbvchfh.dll",init c:\snxkb.exe4⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Adds Run key to start application
- Enumerates connected drives
- Writes to the Master Boot Record (MBR)
- System Location Discovery: System Language Discovery
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2852
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Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Pre-OS Boot
1Bootkit
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
1Credentials In Files
1Replay Monitor
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Downloads
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Filesize
84KB
MD5584485a06eec456bfbde4fbbc41e491f
SHA114dbf5aeddd39a1cccb15266d54e8b449450dad4
SHA2567909d97da9a4c61f6c2d386bf8c2bd4ca44762fb32de970c6c0d3dff8d7ead2f
SHA5127c5780fa1eb2ef81401bcd8d0d1d194f7eea75379882ea26ebb01782a57bdffedabee85d15b7edf2777c01fa8cef76b8c9538e33b83da4787304b0cbeb4fa4d8
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Filesize
42KB
MD536e3fb5964d663272cf1169e1e1ca478
SHA158115e08b49505bcbbb5c88a28a86222ba18d5d4
SHA256c7c41689de030df0f78f471422fa2a6383b36e77c94e7f6f124a96feb3e27ed7
SHA512daff53b11aa400437a06287707a334a09661c1ef7d0fd8beaf1a874c79c16fe45bd1188343d0623e839d3ead5ea2dd90896e37ccf3b252c7220c74989a9ba442