formbook | 988d2c306698b469a52c807a28fbd030868b108458ed2b72e6f776f2ed933703

Modify Registry

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	msiexec.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\7NXXNL98UBO = "C:\\Program Files (x86)\\Ugzmpqvhx\\chkdskbns.exe"	msiexec.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation	2f159c22c90f5cbddfdba3455f2aa94e_JaffaCakes118.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation	Uulebo.exe

Executes dropped EXE 2 IoCs

pid	Process
3752	Uulebo.exe
2120	bin.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 2 IoCs

persistence

Registry Run Keys / Startup Folder

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\DHCP Subsystem = "C:\\Program Files (x86)\\DHCP Subsystem\\dhcpss.exe"	regasm.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3906287020-2915474608-1755617787-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\vogitq = "C:\\Users\\Admin\\AppData\\Roaming\\Zlfac\\vogitq.url"	Uulebo.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	regasm.exe

Suspicious use of SetThreadContext 5 IoCs

description	pid	Process	procid_target
PID 3752 set thread context of 1536	3752	Uulebo.exe	95
PID 2120 set thread context of 3432	2120	bin.exe	56
PID 2120 set thread context of 3432	2120	bin.exe	56
PID 1668 set thread context of 3432	1668	msiexec.exe	56
PID 3752 set thread context of 4848	3752	Uulebo.exe	108

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\DHCP Subsystem\dhcpss.exe	regasm.exe
File opened for modification	C:\Program Files (x86)\DHCP Subsystem\dhcpss.exe	regasm.exe
File opened for modification	C:\Program Files (x86)\Ugzmpqvhx\chkdskbns.exe	msiexec.exe

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 2 IoCs

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

persistence

Scheduled Task/Job

pid	Process
4580	schtasks.exe
404	schtasks.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

description	ioc	Process
Key created	\Registry\User\S-1-5-21-3906287020-2915474608-1755617787-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	msiexec.exe

Suspicious behavior: EnumeratesProcesses 59 IoCs

pid	Process
3752	Uulebo.exe
3752	Uulebo.exe
3752	Uulebo.exe
3752	Uulebo.exe
2120	bin.exe
2120	bin.exe
2120	bin.exe
2120	bin.exe
1536	regasm.exe
1536	regasm.exe
1536	regasm.exe
2120	bin.exe
2120	bin.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe
3752	Uulebo.exe
3752	Uulebo.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe
3752	Uulebo.exe
3752	Uulebo.exe
4848	regasm.exe
4848	regasm.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1536	regasm.exe

Suspicious behavior: MapViewOfSection 8 IoCs

pid	Process
2120	bin.exe
2120	bin.exe
2120	bin.exe
2120	bin.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe
1668	msiexec.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	3752	Uulebo.exe
Token: SeDebugPrivilege	2120	bin.exe
Token: SeDebugPrivilege	1536	regasm.exe
Token: SeDebugPrivilege	1668	msiexec.exe
Token: SeDebugPrivilege	4848	regasm.exe
Token: SeShutdownPrivilege	3432	Explorer.EXE
Token: SeCreatePagefilePrivilege	3432	Explorer.EXE
Token: SeShutdownPrivilege	3432	Explorer.EXE
Token: SeCreatePagefilePrivilege	3432	Explorer.EXE

Suspicious use of UnmapMainImage 1 IoCs

pid	Process
3432	Explorer.EXE

Suspicious use of WriteProcessMemory 46 IoCs

description	pid	Process	procid_target
PID 2176 wrote to memory of 3752	2176	2f159c22c90f5cbddfdba3455f2aa94e_JaffaCakes118.exe	92
PID 2176 wrote to memory of 3752	2176	2f159c22c90f5cbddfdba3455f2aa94e_JaffaCakes118.exe	92
PID 2176 wrote to memory of 3752	2176	2f159c22c90f5cbddfdba3455f2aa94e_JaffaCakes118.exe	92
PID 3752 wrote to memory of 3064	3752	Uulebo.exe	94
PID 3752 wrote to memory of 3064	3752	Uulebo.exe	94
PID 3752 wrote to memory of 3064	3752	Uulebo.exe	94
PID 3752 wrote to memory of 1536	3752	Uulebo.exe	95
PID 3752 wrote to memory of 1536	3752	Uulebo.exe	95
PID 3752 wrote to memory of 1536	3752	Uulebo.exe	95
PID 3752 wrote to memory of 1536	3752	Uulebo.exe	95
PID 3752 wrote to memory of 1536	3752	Uulebo.exe	95
PID 3752 wrote to memory of 1536	3752	Uulebo.exe	95
PID 3752 wrote to memory of 1536	3752	Uulebo.exe	95
PID 3752 wrote to memory of 1536	3752	Uulebo.exe	95
PID 3752 wrote to memory of 2120	3752	Uulebo.exe	96
PID 3752 wrote to memory of 2120	3752	Uulebo.exe	96
PID 3752 wrote to memory of 2120	3752	Uulebo.exe	96
PID 1536 wrote to memory of 4580	1536	regasm.exe	97
PID 1536 wrote to memory of 4580	1536	regasm.exe	97
PID 1536 wrote to memory of 4580	1536	regasm.exe	97
PID 1536 wrote to memory of 404	1536	regasm.exe	99
PID 1536 wrote to memory of 404	1536	regasm.exe	99
PID 1536 wrote to memory of 404	1536	regasm.exe	99
PID 3432 wrote to memory of 1668	3432	Explorer.EXE	102
PID 3432 wrote to memory of 1668	3432	Explorer.EXE	102
PID 3432 wrote to memory of 1668	3432	Explorer.EXE	102
PID 1668 wrote to memory of 4336	1668	msiexec.exe	103
PID 1668 wrote to memory of 4336	1668	msiexec.exe	103
PID 1668 wrote to memory of 4336	1668	msiexec.exe	103
PID 3752 wrote to memory of 4876	3752	Uulebo.exe	105
PID 3752 wrote to memory of 4876	3752	Uulebo.exe	105
PID 3752 wrote to memory of 4876	3752	Uulebo.exe	105
PID 3752 wrote to memory of 4848	3752	Uulebo.exe	108
PID 3752 wrote to memory of 4848	3752	Uulebo.exe	108
PID 3752 wrote to memory of 4848	3752	Uulebo.exe	108
PID 3752 wrote to memory of 4848	3752	Uulebo.exe	108
PID 3752 wrote to memory of 4848	3752	Uulebo.exe	108
PID 3752 wrote to memory of 4848	3752	Uulebo.exe	108
PID 3752 wrote to memory of 4848	3752	Uulebo.exe	108
PID 3752 wrote to memory of 4848	3752	Uulebo.exe	108
PID 1668 wrote to memory of 3772	1668	msiexec.exe	109
PID 1668 wrote to memory of 3772	1668	msiexec.exe	109
PID 1668 wrote to memory of 3772	1668	msiexec.exe	109
PID 1668 wrote to memory of 2500	1668	msiexec.exe	111
PID 1668 wrote to memory of 2500	1668	msiexec.exe	111
PID 1668 wrote to memory of 2500	1668	msiexec.exe	111

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:3432
- C:\Users\Admin\AppData\Local\Temp\2f159c22c90f5cbddfdba3455f2aa94e_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\2f159c22c90f5cbddfdba3455f2aa94e_JaffaCakes118.exe"
  2⤵
  - Checks computer location settings
  - Suspicious use of WriteProcessMemory
  PID:2176
- - C:\Users\Admin\AppData\Roaming\Zlfac\Uulebo.exe
    "C:\Users\Admin\AppData\Roaming\Zlfac\Uulebo.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3752
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe"
      4⤵
      PID:3064
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe"
      4⤵
      Adds Run key to start application
      Checks whether UAC is enabled
      Drops file in Program Files directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:1536
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks.exe" /create /f /tn "DHCP Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmpB8F0.tmp"
        5⤵
        Creates scheduled task(s)
        
        PID:4580
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks.exe" /create /f /tn "DHCP Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpB97D.tmp"
        5⤵
        Creates scheduled task(s)
        
        PID:404
  - - C:\Users\Admin\AppData\Roaming\bin.exe
      "C:\Users\Admin\AppData\Roaming\bin.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of AdjustPrivilegeToken
      PID:2120
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe"
      4⤵
      PID:4876
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe"
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4848
- C:\Windows\SysWOW64\msiexec.exe
  "C:\Windows\SysWOW64\msiexec.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:1668
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Roaming\bin.exe"
    3⤵
    PID:4336
- - 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:3772
- - C:\Program Files\Mozilla Firefox\Firefox.exe
    "C:\Program Files\Mozilla Firefox\Firefox.exe"
    3⤵
    PID:2500

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Defense Evasion

Modify Registry