390d7472201e8ea9bdc6c7fa2b4ab1f6faca02071f1f997037cc5f52759a9cb6

Resubmissions

12-11-2021 18:04

211112-wnzb8aahhm 10

19-11-2020 10:08

201119-rhwlt38jrx 10

18-11-2020 17:26

201118-htd4fq29va 10

Analysis

max time kernel
119s
max time network
300s
platform
windows10_x64
resource
win10-en-20211014
submitted
12-11-2021 18:04

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General

Target

VyprVPN.exe
Size

1.6MB
MD5

f1d5f022e71b8bc9e3241fbb72e87be2
SHA1

1b8abac6f9ffc3571b14c68ae1bc5e7568b4106c
SHA256

08fb58bfaee81d99cbb71bf71ba8f2ab4f107563c5b0c3f20484d096b337e50d
SHA512

f16130958a3ff33b21623881cbdeec018dd031b4aeb01bbb676c4bdeb1ec1d4f7d312efab48b4125eaaf6ea1c8b0aa4e037b1959af1f10c2a55fbc2da9f3924f

Score

10^/10

persistence spyware stealer

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-941723256-3451054534-3089625102-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, C:\\Users\\Admin\\WinService.exe"	Clipper.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, C:\\Users\\Admin\\WinService.exe"	Clipper.exe

Executes dropped EXE 6 IoCs

pid	Process
2936	joinResult.exe
864	VyprVPN.exe
804	1111.exe
1632	Clipper.exe
604	WinService.exe
2028	WinService.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-941723256-3451054534-3089625102-1000\Control Panel\International\Geo\Nation	1111.exe

Loads dropped DLL 2 IoCs

pid	Process
1164	VyprVPN.exe
2936	joinResult.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
804	1111.exe
804	1111.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

NSIS installer 4 IoCs

installer

resource	yara_rule
behavioral20/files/0x000600000001abc9-120.dat	nsis_installer_1
behavioral20/files/0x000600000001abc9-120.dat	nsis_installer_2
behavioral20/files/0x000600000001abc9-121.dat	nsis_installer_1
behavioral20/files/0x000600000001abc9-121.dat	nsis_installer_2

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
1692	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1988	PING.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
804	1111.exe
804	1111.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1632	Clipper.exe
Token: SeDebugPrivilege	604	WinService.exe
Token: SeDebugPrivilege	2028	WinService.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
804	1111.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1164 wrote to memory of 2936	1164	VyprVPN.exe	68
PID 1164 wrote to memory of 2936	1164	VyprVPN.exe	68
PID 1164 wrote to memory of 2936	1164	VyprVPN.exe	68
PID 1164 wrote to memory of 864	1164	VyprVPN.exe	69
PID 1164 wrote to memory of 864	1164	VyprVPN.exe	69
PID 1164 wrote to memory of 864	1164	VyprVPN.exe	69
PID 2936 wrote to memory of 804	2936	joinResult.exe	70
PID 2936 wrote to memory of 804	2936	joinResult.exe	70
PID 2936 wrote to memory of 804	2936	joinResult.exe	70
PID 2936 wrote to memory of 1632	2936	joinResult.exe	71
PID 2936 wrote to memory of 1632	2936	joinResult.exe	71
PID 1632 wrote to memory of 1692	1632	Clipper.exe	73
PID 1632 wrote to memory of 1692	1632	Clipper.exe	73
PID 1632 wrote to memory of 604	1632	Clipper.exe	75
PID 1632 wrote to memory of 604	1632	Clipper.exe	75
PID 804 wrote to memory of 2268	804	1111.exe	78
PID 804 wrote to memory of 2268	804	1111.exe	78
PID 804 wrote to memory of 2268	804	1111.exe	78
PID 2268 wrote to memory of 1988	2268	cmd.exe	80
PID 2268 wrote to memory of 1988	2268	cmd.exe	80
PID 2268 wrote to memory of 1988	2268	cmd.exe	80

C:\Users\Admin\AppData\Local\Temp\VyprVPN.exe
"C:\Users\Admin\AppData\Local\Temp\VyprVPN.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1164
- C:\Users\Admin\AppData\Roaming\1337\joinResult.exe
  "C:\Users\Admin\AppData\Roaming\1337\joinResult.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:2936
- - C:\Users\Admin\AppData\Roaming\1337\1111.exe
    "C:\Users\Admin\AppData\Roaming\1337\1111.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:804
  - - C:\Windows\SysWOW64\cmd.exe
      cmd.exe /C ping 1.1.1.1 -n 3 -w 3000 > Nul & Del /f /q "C:\Users\Admin\AppData\Roaming\1337\1111.exe"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2268
    - - C:\Windows\SysWOW64\PING.EXE
        
        ping 1.1.1.1 -n 3 -w 3000
        5⤵
        Runs ping.exe
        
        PID:1988
- - C:\Users\Admin\AppData\Roaming\1337\Clipper.exe
    "C:\Users\Admin\AppData\Roaming\1337\Clipper.exe"
    3⤵
    - Modifies WinLogon for persistence
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1632
  - - C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /sc MINUTE /mo 1 /tn "Windows Service" /tr "C:\Users\Admin\WinService.exe" /f
      4⤵
      Creates scheduled task(s)
      PID:1692
  - - C:\Users\Admin\WinService.exe
      "C:\Users\Admin\WinService.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of AdjustPrivilegeToken
      PID:604
- C:\Users\Admin\AppData\Roaming\1337\VyprVPN.exe
  "C:\Users\Admin\AppData\Roaming\1337\VyprVPN.exe"
  2⤵
  - Executes dropped EXE
  PID:864

C:\Users\Admin\WinService.exe
C:\Users\Admin\WinService.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2028

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Winlogon Helper DLL

T1004

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/864-132-0x0000000000E40000-0x0000000000E41000-memory.dmp

Filesize
4KB

Download
memory/864-148-0x0000000005AB0000-0x0000000005FAE000-memory.dmp

Filesize
5.0MB

Download
memory/864-138-0x0000000005AB0000-0x0000000005AB1000-memory.dmp

Filesize
4KB

Download
memory/864-139-0x0000000005A10000-0x0000000005A11000-memory.dmp

Filesize
4KB

Download
memory/864-140-0x0000000005CA0000-0x0000000005CA1000-memory.dmp

Filesize
4KB

Download
memory/864-141-0x0000000005AB0000-0x0000000005FAE000-memory.dmp

Filesize
5.0MB

Download
memory/864-135-0x0000000005FB0000-0x0000000005FB1000-memory.dmp

Filesize
4KB

Download
memory/864-134-0x0000000005960000-0x0000000005961000-memory.dmp

Filesize
4KB

Download
memory/1632-136-0x0000000000EA0000-0x0000000000EA1000-memory.dmp

Filesize
4KB

Download
memory/2028-154-0x000000001B270000-0x000000001B272000-memory.dmp

Filesize
8KB

Download