formbook | 5d2be550db7b54a3bb218ccc00904299863d2acc71095fc28d470488b0f1aca0

Modify Registry

Processes:

chkdsk.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	chkdsk.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\X8VXG6RHQZC = "C:\\Program Files (x86)\\Jfdfdl\\2d9lwraxn.exe"	chkdsk.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

Processes:

wscript.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation wscript.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	wscript.exe

Drops startup file 2 IoCs

Processes:

wscript.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\CJiKMkZXYA.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\CJiKMkZXYA.js	wscript.exe

Executes dropped EXE 2 IoCs

Processes:

wealth.exe2d9lwraxn.exe

pid process

2992 wealth.exe
4816 2d9lwraxn.exe
Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

Modify Registry

Processes:

wscript.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SEJOKAOI5S = "\"C:\\Users\\Admin\\AppData\\Roaming\\CJiKMkZXYA.js\""	wscript.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

wealth.exechkdsk.exe

description	pid	process	target process
PID 2992 set thread context of 3488	2992	wealth.exe	Explorer.EXE
PID 2368 set thread context of 3488	2368	chkdsk.exe	Explorer.EXE

Drops file in Program Files directory 4 IoCs

Processes:

chkdsk.exeExplorer.EXE

description	ioc	process
File opened for modification	C:\Program Files (x86)\Jfdfdl\2d9lwraxn.exe	chkdsk.exe
File opened for modification	C:\Program Files (x86)\Jfdfdl	Explorer.EXE
File created	C:\Program Files (x86)\Jfdfdl\2d9lwraxn.exe	Explorer.EXE
File opened for modification	C:\Program Files (x86)\Jfdfdl\2d9lwraxn.exe	Explorer.EXE

Command and Scripting Interpreter: JavaScript 1 TTPs
execution

JavaScript
T1059.007
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 5 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

Processes:

cmd.execmd.exe2d9lwraxn.exewealth.exechkdsk.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2d9lwraxn.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wealth.exe
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

Processes:

chkdsk.exe

description ioc process

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

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

Processes:

chkdsk.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	chkdsk.exe

Suspicious behavior: EnumeratesProcesses 62 IoCs

Processes:

wealth.exechkdsk.exe2d9lwraxn.exe

pid	process
2992	wealth.exe
2992	wealth.exe
2992	wealth.exe
2992	wealth.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
2368	chkdsk.exe
4816	2d9lwraxn.exe
4816	2d9lwraxn.exe

Suspicious behavior: MapViewOfSection 6 IoCs

Processes:

wealth.exechkdsk.exe

pid process

2992 wealth.exe
2992 wealth.exe
2992 wealth.exe
2368 chkdsk.exe
2368 chkdsk.exe
2368 chkdsk.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

wealth.exechkdsk.exeExplorer.EXE2d9lwraxn.exe

description	pid	process
Token: SeDebugPrivilege	2992	wealth.exe
Token: SeDebugPrivilege	2368	chkdsk.exe
Token: SeShutdownPrivilege	3488	Explorer.EXE
Token: SeCreatePagefilePrivilege	3488	Explorer.EXE
Token: SeDebugPrivilege	4816	2d9lwraxn.exe

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

wscript.exeExplorer.EXEchkdsk.exe

description	pid	process	target process
PID 3224 wrote to memory of 4452	3224	wscript.exe	wscript.exe
PID 3224 wrote to memory of 4452	3224	wscript.exe	wscript.exe
PID 3224 wrote to memory of 2992	3224	wscript.exe	wealth.exe
PID 3224 wrote to memory of 2992	3224	wscript.exe	wealth.exe
PID 3224 wrote to memory of 2992	3224	wscript.exe	wealth.exe
PID 3488 wrote to memory of 2368	3488	Explorer.EXE	chkdsk.exe
PID 3488 wrote to memory of 2368	3488	Explorer.EXE	chkdsk.exe
PID 3488 wrote to memory of 2368	3488	Explorer.EXE	chkdsk.exe
PID 2368 wrote to memory of 1704	2368	chkdsk.exe	cmd.exe
PID 2368 wrote to memory of 1704	2368	chkdsk.exe	cmd.exe
PID 2368 wrote to memory of 1704	2368	chkdsk.exe	cmd.exe
PID 2368 wrote to memory of 2744	2368	chkdsk.exe	cmd.exe
PID 2368 wrote to memory of 2744	2368	chkdsk.exe	cmd.exe
PID 2368 wrote to memory of 2744	2368	chkdsk.exe	cmd.exe
PID 2368 wrote to memory of 4260	2368	chkdsk.exe	Firefox.exe
PID 2368 wrote to memory of 4260	2368	chkdsk.exe	Firefox.exe
PID 3488 wrote to memory of 4816	3488	Explorer.EXE	2d9lwraxn.exe
PID 3488 wrote to memory of 4816	3488	Explorer.EXE	2d9lwraxn.exe
PID 3488 wrote to memory of 4816	3488	Explorer.EXE	2d9lwraxn.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3488
- C:\Windows\system32\wscript.exe
  wscript.exe C:\Users\Admin\AppData\Local\Temp\d2d96154024ca3137cd2e84d367053ea8e0de0459a781356577a3ba775c1fb8e.js
  2⤵
  - Checks computer location settings
  - Suspicious use of WriteProcessMemory
  PID:3224
- - C:\Windows\System32\wscript.exe
    "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\CJiKMkZXYA.js"
    3⤵
    - Drops startup file
    - Adds Run key to start application
    PID:4452
- - C:\Users\Admin\AppData\Local\Temp\wealth.exe
    "C:\Users\Admin\AppData\Local\Temp\wealth.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2992
- C:\Windows\SysWOW64\chkdsk.exe
  "C:\Windows\SysWOW64\chkdsk.exe"
  2⤵
  - Adds policy Run key to start application
  - Suspicious use of SetThreadContext
  - Drops file in Program Files directory
  - 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:2368
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\wealth.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1704
- - 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⤵
    - System Location Discovery: System Language Discovery
    PID:2744
- - C:\Program Files\Mozilla Firefox\Firefox.exe
    "C:\Program Files\Mozilla Firefox\Firefox.exe"
    3⤵
    PID:4260
- C:\Program Files (x86)\Jfdfdl\2d9lwraxn.exe
  "C:\Program Files (x86)\Jfdfdl\2d9lwraxn.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4816

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

JavaScript

T1059.007

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

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

3

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System