formbook | 8609c4df740a94c7fee414412129036660d4793be02de50458f662ae96e4b74c

Modify Registry

description	ioc	Process
Key created	\Registry\User\S-1-5-21-4177215427-74451935-3209572229-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	chkdsk.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
1616	powershell.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Windows\CurrentVersion\Run\Nová objednávka pdf = "C:\\Users\\Admin\\Nová objednávka pdf.exe"	Nová objednávka pdf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Windows\CurrentVersion\Run\T2_TQ6YXET = "C:\\Program Files (x86)\\Windows Mail\\wab.exe"	chkdsk.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2420 set thread context of 2156	2420	Nová objednávka pdf.exe	34
PID 2156 set thread context of 1192	2156	wab.exe	21
PID 2808 set thread context of 1192	2808	chkdsk.exe	21

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	chkdsk.exe

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	chkdsk.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

description	ioc	Process
Key created	\Registry\User\S-1-5-21-4177215427-74451935-3209572229-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	chkdsk.exe

Runs regedit.exe 1 IoCs

pid	Process
2700	regedit.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
1616	powershell.exe
2156	wab.exe
2156	wab.exe
2808	chkdsk.exe
2808	chkdsk.exe
2808	chkdsk.exe
2808	chkdsk.exe
2808	chkdsk.exe
2808	chkdsk.exe
2808	chkdsk.exe
2808	chkdsk.exe
2808	chkdsk.exe
2808	chkdsk.exe
2808	chkdsk.exe
2808	chkdsk.exe
2808	chkdsk.exe
2808	chkdsk.exe
2808	chkdsk.exe
2808	chkdsk.exe
2808	chkdsk.exe
2808	chkdsk.exe
2808	chkdsk.exe
2808	chkdsk.exe
2808	chkdsk.exe
2808	chkdsk.exe
2808	chkdsk.exe
2808	chkdsk.exe
2808	chkdsk.exe
2808	chkdsk.exe
2808	chkdsk.exe
2808	chkdsk.exe

Suspicious behavior: MapViewOfSection 7 IoCs

pid	Process
2156	wab.exe
2156	wab.exe
2156	wab.exe
2808	chkdsk.exe
2808	chkdsk.exe
2808	chkdsk.exe
2808	chkdsk.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2420	Nová objednávka pdf.exe
Token: SeDebugPrivilege	1616	powershell.exe
Token: SeDebugPrivilege	2156	wab.exe
Token: SeDebugPrivilege	2808	chkdsk.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2420 wrote to memory of 1616	2420	Nová objednávka pdf.exe	31
PID 2420 wrote to memory of 1616	2420	Nová objednávka pdf.exe	31
PID 2420 wrote to memory of 1616	2420	Nová objednávka pdf.exe	31
PID 2420 wrote to memory of 2700	2420	Nová objednávka pdf.exe	33
PID 2420 wrote to memory of 2700	2420	Nová objednávka pdf.exe	33
PID 2420 wrote to memory of 2700	2420	Nová objednávka pdf.exe	33
PID 2420 wrote to memory of 2700	2420	Nová objednávka pdf.exe	33
PID 2420 wrote to memory of 2700	2420	Nová objednávka pdf.exe	33
PID 2420 wrote to memory of 2156	2420	Nová objednávka pdf.exe	34
PID 2420 wrote to memory of 2156	2420	Nová objednávka pdf.exe	34
PID 2420 wrote to memory of 2156	2420	Nová objednávka pdf.exe	34
PID 2420 wrote to memory of 2156	2420	Nová objednávka pdf.exe	34
PID 2420 wrote to memory of 2156	2420	Nová objednávka pdf.exe	34
PID 2420 wrote to memory of 2156	2420	Nová objednávka pdf.exe	34
PID 2420 wrote to memory of 2156	2420	Nová objednávka pdf.exe	34
PID 1192 wrote to memory of 2808	1192	Explorer.EXE	35
PID 1192 wrote to memory of 2808	1192	Explorer.EXE	35
PID 1192 wrote to memory of 2808	1192	Explorer.EXE	35
PID 1192 wrote to memory of 2808	1192	Explorer.EXE	35
PID 2808 wrote to memory of 2616	2808	chkdsk.exe	37
PID 2808 wrote to memory of 2616	2808	chkdsk.exe	37
PID 2808 wrote to memory of 2616	2808	chkdsk.exe	37
PID 2808 wrote to memory of 2616	2808	chkdsk.exe	37
PID 2808 wrote to memory of 2616	2808	chkdsk.exe	37

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1192
- C:\Users\Admin\AppData\Local\Temp\Nová objednávka pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Nová objednávka pdf.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2420
- - C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath $env:UserProfile
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1616
- - C:\Windows\regedit.exe
    "C:\Windows\regedit.exe"
    3⤵
    - Runs regedit.exe
    PID:2700
- - C:\Program Files (x86)\Windows Mail\wab.exe
    "C:\Program Files (x86)\Windows Mail\wab.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2156
- C:\Windows\SysWOW64\chkdsk.exe
  "C:\Windows\SysWOW64\chkdsk.exe"
  2⤵
  - Adds policy Run key to start application
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Enumerates system info in registry
  - Modifies Internet Explorer settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2808
- - C:\Program Files\Mozilla Firefox\Firefox.exe
    "C:\Program Files\Mozilla Firefox\Firefox.exe"
    3⤵
    PID:2616

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

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

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery