formbook | b3cc4e1f09aa77a31e7071f2a505bfe5f13f9ec3cb73997b0d4a5ac36fc710fa

Analysis

max time kernel
160s
max time network
167s
platform
windows7_x64
resource
win7v200217
submitted
20-02-2020 07:05

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General

Target

PAYMENT DETAILS_PDF.exe
Size

339KB
MD5

cc675d172df52a4539784a7be697efe2
SHA1

ba0aed7428515321f793cc000647c668da9f1012
SHA256

3255322e73ad5e7a0c36e8019424fbb7cbc8acbd10293a0387db72b95620c71e
SHA512

3f345fbfa793017cb866e955e29ce25befa4f8b58898d6547027214829940fd17fd235ceb1ce25f60c920a46ee568da3e60dfb251c6571bd113438384d10df76

Score

10^/10

spyware evasion trojan persistence stealer formbook

Malware Config

Signatures

Suspicious behavior: EnumeratesProcesses 29 IoCs

Processes:

PAYMENT DETAILS_PDF.exemstsc.exe

pid	process
1876	PAYMENT DETAILS_PDF.exe
1876	PAYMENT DETAILS_PDF.exe
1876	PAYMENT DETAILS_PDF.exe
1892	mstsc.exe
1892	mstsc.exe
1892	mstsc.exe
1892	mstsc.exe
1892	mstsc.exe
1892	mstsc.exe
1892	mstsc.exe
1892	mstsc.exe
1892	mstsc.exe
1892	mstsc.exe
1892	mstsc.exe
1892	mstsc.exe
1892	mstsc.exe
1892	mstsc.exe
1892	mstsc.exe
1892	mstsc.exe
1892	mstsc.exe
1892	mstsc.exe
1892	mstsc.exe
1892	mstsc.exe
1892	mstsc.exe
1892	mstsc.exe
1892	mstsc.exe
1892	mstsc.exe
1892	mstsc.exe
1892	mstsc.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

Explorer.EXEmstsc.exe

description	pid	process	target process
PID 1296 wrote to memory of 1892	1296	Explorer.EXE	mstsc.exe
PID 1296 wrote to memory of 1892	1296	Explorer.EXE	mstsc.exe
PID 1296 wrote to memory of 1892	1296	Explorer.EXE	mstsc.exe
PID 1296 wrote to memory of 1892	1296	Explorer.EXE	mstsc.exe
PID 1892 wrote to memory of 1908	1892	mstsc.exe	cmd.exe
PID 1892 wrote to memory of 1908	1892	mstsc.exe	cmd.exe
PID 1892 wrote to memory of 1908	1892	mstsc.exe	cmd.exe
PID 1892 wrote to memory of 1908	1892	mstsc.exe	cmd.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

mstsc.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-1848298919-2336104428-4012071465-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	mstsc.exe

Reads browser user data or profiles (possible credential harvesting) 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081
Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

Explorer.EXE

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA Explorer.EXE
Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

Explorer.EXE

pid process

1296 Explorer.EXE
System policy modification 1 TTPs 1 IoCs
evasion

Modify Registry
T1112

Processes:

mstsc.exe

description ioc process

Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer mstsc.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	Explorer.EXE

pid	process
1296	Explorer.EXE

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer	mstsc.exe

Adds Run entry to policy start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

mstsc.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	mstsc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\YRZX9FWHIX = "C:\\Program Files (x86)\\Mohlxv4\\systrayyt8h.exe"	mstsc.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

PAYMENT DETAILS_PDF.exemstsc.exeExplorer.EXE

description	pid	process
Token: SeDebugPrivilege	1876	PAYMENT DETAILS_PDF.exe
Token: SeDebugPrivilege	1892	mstsc.exe
Token: SeShutdownPrivilege	1296	Explorer.EXE

Suspicious behavior: MapViewOfSection 6 IoCs

Processes:

PAYMENT DETAILS_PDF.exemstsc.exe

pid process

1876 PAYMENT DETAILS_PDF.exe
1876 PAYMENT DETAILS_PDF.exe
1876 PAYMENT DETAILS_PDF.exe
1876 PAYMENT DETAILS_PDF.exe
1892 mstsc.exe
1892 mstsc.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

PAYMENT DETAILS_PDF.exemstsc.exe

description	pid	process	target process
PID 1876 set thread context of 1296	1876	PAYMENT DETAILS_PDF.exe	Explorer.EXE
PID 1876 set thread context of 1296	1876	PAYMENT DETAILS_PDF.exe	Explorer.EXE
PID 1892 set thread context of 1296	1892	mstsc.exe	Explorer.EXE

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1908 cmd.exe
Drops file in Program Files directory 1 IoCs

Processes:

mstsc.exe

description ioc process

File opened for modification C:\Program Files (x86)\Mohlxv4\systrayyt8h.exe mstsc.exe
Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook

pid	process
1908	cmd.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Mohlxv4\systrayyt8h.exe	mstsc.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
- Checks whether UAC is enabled
- Suspicious use of FindShellTrayWindow
- Suspicious use of AdjustPrivilegeToken
PID:1296

C:\Users\Admin\AppData\Local\Temp\PAYMENT DETAILS_PDF.exe
"C:\Users\Admin\AppData\Local\Temp\PAYMENT DETAILS_PDF.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetThreadContext
PID:1876

C:\Windows\SysWOW64\mstsc.exe
"C:\Windows\SysWOW64\mstsc.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
- Modifies Internet Explorer settings
- System policy modification
- Adds Run entry to policy start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
PID:1892

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\PAYMENT DETAILS_PDF.exe"
3⤵
- Deletes itself
PID:1908

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\7219O36A\721logim.jpeg

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C:\Users\Admin\AppData\Roaming\7219O36A\721logri.ini

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C:\Users\Admin\AppData\Roaming\7219O36A\721logrv.ini

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memory/1892-1-0x00000000007B0000-0x00000000008B4000-memory.dmp

Filesize
1.0MB

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