formbook | 6031b6aeab0b8c5111938e3c0819e717858aa3586bcdacea994d980ac36c5368

General

Target

PO 17774.xls
Size

183KB
MD5

7689c98d5db51db149591210ad24c4ff
SHA1

4419b76003f333925f4cf84b5e679ff64d7d6d08
SHA256

6031b6aeab0b8c5111938e3c0819e717858aa3586bcdacea994d980ac36c5368
SHA512

e6eab1c3b21e3f4fd76cebd9bc849ed07eec2c26bc4df5605a3628702abc8d3b099589acaf89cc8334448bcbc25ddc3810d8ea2d0f18009e343dbc8c1124db5b

Score

10^/10

rat trojan spyware stealer formbook evasion persistence

Malware Config

Signatures

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

108 EXCEL.EXE
Executes dropped EXE 4 IoCs

Processes:

svchost32.exesvchost32.exevgaaxu.exevgaaxu.exe

pid process

1908 svchost32.exe
1812 svchost32.exe
1860 vgaaxu.exe
656 vgaaxu.exe

pid	process
108	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 30 IoCs

Processes:

svchost32.exesvchost32.exewininit.exevgaaxu.exevgaaxu.exe

pid	process
1908	svchost32.exe
1812	svchost32.exe
1812	svchost32.exe
468	wininit.exe
468	wininit.exe
468	wininit.exe
468	wininit.exe
468	wininit.exe
468	wininit.exe
468	wininit.exe
468	wininit.exe
468	wininit.exe
468	wininit.exe
468	wininit.exe
468	wininit.exe
468	wininit.exe
468	wininit.exe
468	wininit.exe
468	wininit.exe
468	wininit.exe
468	wininit.exe
468	wininit.exe
468	wininit.exe
468	wininit.exe
468	wininit.exe
468	wininit.exe
468	wininit.exe
468	wininit.exe
1860	vgaaxu.exe
656	vgaaxu.exe

System policy modification 1 TTPs 1 IoCs
evasion

Modify Registry
T1112

Processes:

wininit.exe

description ioc process

Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer wininit.exe
Suspicious use of SendNotifyMessage 6 IoCs

Processes:

Explorer.EXE

pid process

1220 Explorer.EXE
1220 Explorer.EXE
1220 Explorer.EXE
1220 Explorer.EXE
1220 Explorer.EXE
1220 Explorer.EXE
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware

Data from Local System
T1005

Credentials in Files
T1081

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

pid	process
1220	Explorer.EXE
1220	Explorer.EXE
1220	Explorer.EXE
1220	Explorer.EXE
1220	Explorer.EXE
1220	Explorer.EXE

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

wininit.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\BX4DUJ18FPNX = "C:\\Program Files (x86)\\J_bgx\\vgaaxu.exe"	wininit.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	wininit.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

svchost32.exesvchost32.exewininit.exevgaaxu.exe

description	pid	process	target process
PID 1908 set thread context of 1812	1908	svchost32.exe	svchost32.exe
PID 1812 set thread context of 1220	1812	svchost32.exe	Explorer.EXE
PID 468 set thread context of 1220	468	wininit.exe	Explorer.EXE
PID 1860 set thread context of 656	1860	vgaaxu.exe	vgaaxu.exe

Formbook Payload 5 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1812-7-0x0000000000400000-0x0000000000427000-memory.dmp	formbook
behavioral1/memory/1812-7-0x0000000000400000-0x0000000000427000-memory.dmp	formbook
behavioral1/memory/1812-8-0x000000000041C220-mapping.dmp	formbook
behavioral1/memory/468-10-0x0000000000000000-mapping.dmp	formbook
behavioral1/memory/656-29-0x000000000041C220-mapping.dmp	formbook

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
Office loads VBA resources, possible macro or embedded object present

Drops file in Program Files directory 2 IoCs

Processes:

wininit.exeExplorer.EXE

description	ioc	process
File opened for modification	C:\Program Files (x86)\J_bgx\vgaaxu.exe	wininit.exe
File created	C:\Program Files (x86)\J_bgx\vgaaxu.exe	Explorer.EXE

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

Processes:

EXCEL.EXE

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13	EXCEL.EXE
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13\Blob = 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	EXCEL.EXE

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 SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

108 EXCEL.EXE
108 EXCEL.EXE
108 EXCEL.EXE

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

pid	process
108	EXCEL.EXE
108	EXCEL.EXE
108	EXCEL.EXE

Suspicious use of WriteProcessMemory 29 IoCs

Processes:

EXCEL.EXEsvchost32.exeExplorer.EXEwininit.exevgaaxu.exe

description	pid	process	target process
PID 108 wrote to memory of 1908	108	EXCEL.EXE	svchost32.exe
PID 108 wrote to memory of 1908	108	EXCEL.EXE	svchost32.exe
PID 108 wrote to memory of 1908	108	EXCEL.EXE	svchost32.exe
PID 108 wrote to memory of 1908	108	EXCEL.EXE	svchost32.exe
PID 1908 wrote to memory of 1812	1908	svchost32.exe	svchost32.exe
PID 1908 wrote to memory of 1812	1908	svchost32.exe	svchost32.exe
PID 1908 wrote to memory of 1812	1908	svchost32.exe	svchost32.exe
PID 1908 wrote to memory of 1812	1908	svchost32.exe	svchost32.exe
PID 1220 wrote to memory of 468	1220	Explorer.EXE	wininit.exe
PID 1220 wrote to memory of 468	1220	Explorer.EXE	wininit.exe
PID 1220 wrote to memory of 468	1220	Explorer.EXE	wininit.exe
PID 1220 wrote to memory of 468	1220	Explorer.EXE	wininit.exe
PID 468 wrote to memory of 1512	468	wininit.exe	cmd.exe
PID 468 wrote to memory of 1512	468	wininit.exe	cmd.exe
PID 468 wrote to memory of 1512	468	wininit.exe	cmd.exe
PID 468 wrote to memory of 1512	468	wininit.exe	cmd.exe
PID 468 wrote to memory of 1144	468	wininit.exe	Firefox.exe
PID 468 wrote to memory of 1144	468	wininit.exe	Firefox.exe
PID 468 wrote to memory of 1144	468	wininit.exe	Firefox.exe
PID 468 wrote to memory of 1144	468	wininit.exe	Firefox.exe
PID 468 wrote to memory of 1144	468	wininit.exe	Firefox.exe
PID 1220 wrote to memory of 1860	1220	Explorer.EXE	vgaaxu.exe
PID 1220 wrote to memory of 1860	1220	Explorer.EXE	vgaaxu.exe
PID 1220 wrote to memory of 1860	1220	Explorer.EXE	vgaaxu.exe
PID 1220 wrote to memory of 1860	1220	Explorer.EXE	vgaaxu.exe
PID 1860 wrote to memory of 656	1860	vgaaxu.exe	vgaaxu.exe
PID 1860 wrote to memory of 656	1860	vgaaxu.exe	vgaaxu.exe
PID 1860 wrote to memory of 656	1860	vgaaxu.exe	vgaaxu.exe
PID 1860 wrote to memory of 656	1860	vgaaxu.exe	vgaaxu.exe

Suspicious behavior: MapViewOfSection 9 IoCs

Processes:

svchost32.exesvchost32.exewininit.exevgaaxu.exe

pid process

1908 svchost32.exe
1812 svchost32.exe
1812 svchost32.exe
1812 svchost32.exe
468 wininit.exe
468 wininit.exe
468 wininit.exe
468 wininit.exe
1860 vgaaxu.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

svchost32.exewininit.exevgaaxu.exe

description pid process

Token: SeDebugPrivilege 1812 svchost32.exe
Token: SeDebugPrivilege 468 wininit.exe
Token: SeDebugPrivilege 656 vgaaxu.exe
Suspicious use of FindShellTrayWindow 7 IoCs

Processes:

Explorer.EXE

pid process

1220 Explorer.EXE
1220 Explorer.EXE
1220 Explorer.EXE
1220 Explorer.EXE
1220 Explorer.EXE
1220 Explorer.EXE
1220 Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	1812	svchost32.exe
Token: SeDebugPrivilege	468	wininit.exe
Token: SeDebugPrivilege	656	vgaaxu.exe

pid	process
1220	Explorer.EXE
1220	Explorer.EXE
1220	Explorer.EXE
1220	Explorer.EXE
1220	Explorer.EXE
1220	Explorer.EXE
1220	Explorer.EXE

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

wininit.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-2090973689-680783404-4292415065-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	wininit.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of SendNotifyMessage
- Drops file in Program Files directory
- Checks whether UAC is enabled
- Suspicious use of WriteProcessMemory
- Suspicious use of FindShellTrayWindow
PID:1220

C:\Program Files\Microsoft Office\Office14\EXCEL.EXE
"C:\Program Files\Microsoft Office\Office14\EXCEL.EXE" /dde "C:\Users\Admin\AppData\Local\Temp\PO 17774.xls"
2⤵
- Suspicious behavior: AddClipboardFormatListener
- Modifies system certificate store
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:108

C:\Users\Public\svchost32.exe
"C:\Users\Public\svchost32.exe"
3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
- Suspicious behavior: MapViewOfSection
PID:1908

C:\Users\Public\svchost32.exe
"C:\Users\Public\svchost32.exe"
4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1812

C:\Windows\SysWOW64\wininit.exe
"C:\Windows\SysWOW64\wininit.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- System policy modification
- Adds policy Run key to start application
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Modifies Internet Explorer settings
PID:468

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Public\svchost32.exe"
3⤵
PID:1512

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:1144

C:\Program Files (x86)\J_bgx\vgaaxu.exe
"C:\Program Files (x86)\J_bgx\vgaaxu.exe"
2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
- Suspicious behavior: MapViewOfSection
PID:1860

C:\Program Files (x86)\J_bgx\vgaaxu.exe
"C:\Program Files (x86)\J_bgx\vgaaxu.exe"
3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:656

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

4

T1112

Install Root Certificate

1

T1130

Credential Access

Credentials in Files

1

T1081

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

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Downloads

C:\Program Files (x86)\J_bgx\vgaaxu.exe

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C:\Program Files (x86)\J_bgx\vgaaxu.exe

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C:\Program Files (x86)\J_bgx\vgaaxu.exe

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C:\Users\Public\svchost32.exe

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C:\Users\Public\svchost32.exe

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C:\Users\Public\svchost32.exe

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memory/108-3-0x0000000006650000-0x0000000006750000-memory.dmp

Filesize
1024KB

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memory/108-1-0x0000000006650000-0x0000000006750000-memory.dmp

Filesize
1024KB

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memory/108-2-0x0000000006650000-0x0000000006750000-memory.dmp

Filesize
1024KB

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memory/468-10-0x0000000000000000-mapping.dmp

Download
memory/468-11-0x0000000000C60000-0x0000000000C7A000-memory.dmp

Filesize
104KB

Download
memory/468-13-0x0000000000A70000-0x0000000000B03000-memory.dmp

Filesize
588KB

Download
memory/468-14-0x0000000075220000-0x000000007522C000-memory.dmp

Filesize
48KB

Download
memory/468-15-0x0000000076970000-0x0000000076A8D000-memory.dmp

Filesize
1.1MB

Download
memory/468-16-0x0000000076200000-0x000000007635C000-memory.dmp

Filesize
1.4MB

Download
memory/468-22-0x0000000003A80000-0x0000000003BBA000-memory.dmp

Filesize
1.2MB

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memory/656-29-0x000000000041C220-mapping.dmp

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memory/1144-24-0x000000013F5A0000-0x000000013F633000-memory.dmp

Filesize
588KB

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memory/1144-23-0x0000000000000000-mapping.dmp

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memory/1512-12-0x0000000000000000-mapping.dmp

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memory/1812-8-0x000000000041C220-mapping.dmp

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memory/1812-7-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

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memory/1860-25-0x0000000000000000-mapping.dmp

Download
memory/1908-4-0x0000000000000000-mapping.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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