formbook | f563c2c4fd980b0ed5f8b3b6af0039048c35c330936d948e5e51f6b29986bc34

Modify Registry

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	control.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\DDUTDV_H1PH = "C:\\Program Files (x86)\\U1bz\\s2kdefszi.exe"	control.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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	ccb0793dd5bf74d13a395578ff6b3970.exe

Executes dropped EXE 2 IoCs

pid	Process
492	syscheck.exe
4348	syscheck.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
T1552.001

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\sysmgr = "C:\\Users\\Admin\\AppData\\Local\\syscheck.exe -boot"	syscheck.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 492 set thread context of 4348	492	syscheck.exe	98
PID 4348 set thread context of 3428	4348	syscheck.exe	57
PID 4388 set thread context of 3428	4388	control.exe	57

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\U1bz\s2kdefszi.exe	control.exe

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

System Information Discovery
T1082

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

description	ioc	Process
Key created	\Registry\User\S-1-5-21-1497073144-2389943819-3385106915-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	control.exe

Suspicious behavior: EnumeratesProcesses 28 IoCs

pid	Process
4348	syscheck.exe
4348	syscheck.exe
4348	syscheck.exe
4348	syscheck.exe
4388	control.exe
4388	control.exe
4388	control.exe
4388	control.exe
4388	control.exe
4388	control.exe
4388	control.exe
4388	control.exe
4388	control.exe
4388	control.exe
4388	control.exe
4388	control.exe
4388	control.exe
4388	control.exe
4388	control.exe
4388	control.exe
4388	control.exe
4388	control.exe
4388	control.exe
4388	control.exe
4388	control.exe
4388	control.exe
4388	control.exe
4388	control.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
4348	syscheck.exe
4348	syscheck.exe
4348	syscheck.exe
4388	control.exe
4388	control.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	4744	ccb0793dd5bf74d13a395578ff6b3970.exe
Token: SeDebugPrivilege	492	syscheck.exe
Token: SeDebugPrivilege	4348	syscheck.exe
Token: SeDebugPrivilege	4388	control.exe
Token: SeShutdownPrivilege	3428	Explorer.EXE
Token: SeCreatePagefilePrivilege	3428	Explorer.EXE
Token: SeShutdownPrivilege	3428	Explorer.EXE
Token: SeCreatePagefilePrivilege	3428	Explorer.EXE

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 4744 wrote to memory of 4544	4744	ccb0793dd5bf74d13a395578ff6b3970.exe	85
PID 4744 wrote to memory of 4544	4744	ccb0793dd5bf74d13a395578ff6b3970.exe	85
PID 4744 wrote to memory of 4544	4744	ccb0793dd5bf74d13a395578ff6b3970.exe	85
PID 4744 wrote to memory of 1220	4744	ccb0793dd5bf74d13a395578ff6b3970.exe	95
PID 4744 wrote to memory of 1220	4744	ccb0793dd5bf74d13a395578ff6b3970.exe	95
PID 4744 wrote to memory of 1220	4744	ccb0793dd5bf74d13a395578ff6b3970.exe	95
PID 1220 wrote to memory of 492	1220	cmd.exe	97
PID 1220 wrote to memory of 492	1220	cmd.exe	97
PID 1220 wrote to memory of 492	1220	cmd.exe	97
PID 492 wrote to memory of 4348	492	syscheck.exe	98
PID 492 wrote to memory of 4348	492	syscheck.exe	98
PID 492 wrote to memory of 4348	492	syscheck.exe	98
PID 492 wrote to memory of 4348	492	syscheck.exe	98
PID 492 wrote to memory of 4348	492	syscheck.exe	98
PID 492 wrote to memory of 4348	492	syscheck.exe	98
PID 3428 wrote to memory of 4388	3428	Explorer.EXE	99
PID 3428 wrote to memory of 4388	3428	Explorer.EXE	99
PID 3428 wrote to memory of 4388	3428	Explorer.EXE	99
PID 4388 wrote to memory of 2692	4388	control.exe	100
PID 4388 wrote to memory of 2692	4388	control.exe	100
PID 4388 wrote to memory of 2692	4388	control.exe	100
PID 4388 wrote to memory of 3560	4388	control.exe	102
PID 4388 wrote to memory of 3560	4388	control.exe	102
PID 4388 wrote to memory of 3560	4388	control.exe	102

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3428
- C:\Users\Admin\AppData\Local\Temp\ccb0793dd5bf74d13a395578ff6b3970.exe
  "C:\Users\Admin\AppData\Local\Temp\ccb0793dd5bf74d13a395578ff6b3970.exe"
  2⤵
  - Checks computer location settings
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4744
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c copy "C:\Users\Admin\AppData\Local\Temp\ccb0793dd5bf74d13a395578ff6b3970.exe" "C:\Users\Admin\AppData\Local\syscheck.exe"
    3⤵
    PID:4544
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c, "C:\Users\Admin\AppData\Local\syscheck.exe"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1220
  - - C:\Users\Admin\AppData\Local\syscheck.exe
      "C:\Users\Admin\AppData\Local\syscheck.exe"
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of SetThreadContext
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:492
    - - C:\Users\Admin\AppData\Local\syscheck.exe
        
        "C:\Users\Admin\AppData\Local\syscheck.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        Suspicious behavior: EnumeratesProcesses
        Suspicious behavior: MapViewOfSection
        Suspicious use of AdjustPrivilegeToken
        
        PID:4348
- C:\Windows\SysWOW64\control.exe
  "C:\Windows\SysWOW64\control.exe"
  2⤵
  - Adds policy Run key to start application
  - Suspicious use of SetThreadContext
  - Drops file in Program Files directory
  - Modifies Internet Explorer settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4388
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\syscheck.exe"
    3⤵
    PID:2692
- - C:\Windows\SysWOW64\cmd.exe
    /c copy "C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Login Data" "C:\Users\Admin\AppData\Local\Temp\DB1" /V
    3⤵
    PID:3560

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

Defense Evasion

Modify Registry

3

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System