formbook | 6031b6aeab0b8c5111938e3c0819e717858aa3586bcdacea994d980ac36c5368

General

Target

PO 17774.xls
Size

183KB
MD5

7689c98d5db51db149591210ad24c4ff
SHA1

4419b76003f333925f4cf84b5e679ff64d7d6d08
SHA256

6031b6aeab0b8c5111938e3c0819e717858aa3586bcdacea994d980ac36c5368
SHA512

e6eab1c3b21e3f4fd76cebd9bc849ed07eec2c26bc4df5605a3628702abc8d3b099589acaf89cc8334448bcbc25ddc3810d8ea2d0f18009e343dbc8c1124db5b

Score

10^/10

rat persistence trojan spyware stealer formbook

Malware Config

Signatures

Suspicious behavior: EnumeratesProcesses 62 IoCs

Processes:

svchost32.exesvchost32.exemsdt.exeCookiesyz3du.exeCookiesyz3du.exe

pid	process
3188	svchost32.exe
3188	svchost32.exe
664	svchost32.exe
664	svchost32.exe
664	svchost32.exe
664	svchost32.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
3188	msdt.exe
2788	Cookiesyz3du.exe
2788	Cookiesyz3du.exe
708	Cookiesyz3du.exe
708	Cookiesyz3du.exe

Suspicious use of SendNotifyMessage 1 IoCs

Processes:

Explorer.EXE

pid process

2984 Explorer.EXE

pid	process
2984	Explorer.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
716	EXCEL.EXE
716	EXCEL.EXE
716	EXCEL.EXE
716	EXCEL.EXE
716	EXCEL.EXE
716	EXCEL.EXE
716	EXCEL.EXE
716	EXCEL.EXE
716	EXCEL.EXE
716	EXCEL.EXE
716	EXCEL.EXE
716	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

716 EXCEL.EXE
Suspicious use of FindShellTrayWindow 3 IoCs

Processes:

EXCEL.EXEExplorer.EXE

pid process

716 EXCEL.EXE
716 EXCEL.EXE
2984 Explorer.EXE

Suspicious use of SetThreadContext 4 IoCs

Processes:

svchost32.exesvchost32.exemsdt.exeCookiesyz3du.exe

description	pid	process	target process
PID 3188 set thread context of 664	3188	svchost32.exe	svchost32.exe
PID 664 set thread context of 2984	664	svchost32.exe	Explorer.EXE
PID 3188 set thread context of 2984	3188	msdt.exe	Explorer.EXE
PID 2788 set thread context of 708	2788	Cookiesyz3du.exe	Cookiesyz3du.exe

Formbook Payload 5 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/664-8-0x0000000000400000-0x0000000000427000-memory.dmp	formbook
behavioral2/memory/664-8-0x0000000000400000-0x0000000000427000-memory.dmp	formbook
behavioral2/memory/664-9-0x000000000041C220-mapping.dmp	formbook
behavioral2/memory/3188-11-0x0000000000000000-mapping.dmp	formbook
behavioral2/memory/708-27-0x000000000041C220-mapping.dmp	formbook

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

EXCEL.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

msdt.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-2066881839-3229799743-3576549721-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	msdt.exe

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

EXCEL.EXEsvchost32.exeExplorer.EXEmsdt.exeCookiesyz3du.exe

description	pid	process	target process
PID 716 wrote to memory of 3188	716	EXCEL.EXE	svchost32.exe
PID 716 wrote to memory of 3188	716	EXCEL.EXE	svchost32.exe
PID 716 wrote to memory of 3188	716	EXCEL.EXE	svchost32.exe
PID 3188 wrote to memory of 664	3188	svchost32.exe	svchost32.exe
PID 3188 wrote to memory of 664	3188	svchost32.exe	svchost32.exe
PID 3188 wrote to memory of 664	3188	svchost32.exe	svchost32.exe
PID 2984 wrote to memory of 3188	2984	Explorer.EXE	msdt.exe
PID 2984 wrote to memory of 3188	2984	Explorer.EXE	msdt.exe
PID 2984 wrote to memory of 3188	2984	Explorer.EXE	msdt.exe
PID 3188 wrote to memory of 644	3188	msdt.exe	cmd.exe
PID 3188 wrote to memory of 644	3188	msdt.exe	cmd.exe
PID 3188 wrote to memory of 644	3188	msdt.exe	cmd.exe
PID 3188 wrote to memory of 1844	3188	msdt.exe	cmd.exe
PID 3188 wrote to memory of 1844	3188	msdt.exe	cmd.exe
PID 3188 wrote to memory of 1844	3188	msdt.exe	cmd.exe
PID 3188 wrote to memory of 2076	3188	msdt.exe	Firefox.exe
PID 3188 wrote to memory of 2076	3188	msdt.exe	Firefox.exe
PID 3188 wrote to memory of 2076	3188	msdt.exe	Firefox.exe
PID 2984 wrote to memory of 2788	2984	Explorer.EXE	Cookiesyz3du.exe
PID 2984 wrote to memory of 2788	2984	Explorer.EXE	Cookiesyz3du.exe
PID 2984 wrote to memory of 2788	2984	Explorer.EXE	Cookiesyz3du.exe
PID 2788 wrote to memory of 708	2788	Cookiesyz3du.exe	Cookiesyz3du.exe
PID 2788 wrote to memory of 708	2788	Cookiesyz3du.exe	Cookiesyz3du.exe
PID 2788 wrote to memory of 708	2788	Cookiesyz3du.exe	Cookiesyz3du.exe

Executes dropped EXE 4 IoCs

Processes:

svchost32.exesvchost32.exeCookiesyz3du.exeCookiesyz3du.exe

pid process

3188 svchost32.exe
664 svchost32.exe
2788 Cookiesyz3du.exe
708 Cookiesyz3du.exe

Suspicious use of AdjustPrivilegeToken 11 IoCs

Processes:

svchost32.exeExplorer.EXEmsdt.exeCookiesyz3du.exe

description	pid	process
Token: SeDebugPrivilege	664	svchost32.exe
Token: SeShutdownPrivilege	2984	Explorer.EXE
Token: SeCreatePagefilePrivilege	2984	Explorer.EXE
Token: SeDebugPrivilege	3188	msdt.exe
Token: SeShutdownPrivilege	2984	Explorer.EXE
Token: SeCreatePagefilePrivilege	2984	Explorer.EXE
Token: SeShutdownPrivilege	2984	Explorer.EXE
Token: SeCreatePagefilePrivilege	2984	Explorer.EXE
Token: SeShutdownPrivilege	2984	Explorer.EXE
Token: SeCreatePagefilePrivilege	2984	Explorer.EXE
Token: SeDebugPrivilege	708	Cookiesyz3du.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

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

EXCEL.EXE

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE

Suspicious behavior: MapViewOfSection 9 IoCs

Processes:

svchost32.exesvchost32.exemsdt.exeCookiesyz3du.exe

pid process

3188 svchost32.exe
664 svchost32.exe
664 svchost32.exe
664 svchost32.exe
3188 msdt.exe
3188 msdt.exe
3188 msdt.exe
3188 msdt.exe
2788 Cookiesyz3du.exe

Drops file in Program Files directory 4 IoCs

Processes:

msdt.exeExplorer.EXE

description	ioc	process
File opened for modification	C:\Program Files (x86)\Anfd0\Cookiesyz3du.exe	msdt.exe
File opened for modification	C:\Program Files (x86)\Anfd0	Explorer.EXE
File created	C:\Program Files (x86)\Anfd0\Cookiesyz3du.exe	Explorer.EXE
File opened for modification	C:\Program Files (x86)\Anfd0\Cookiesyz3du.exe	Explorer.EXE

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

msdt.exe

description	ioc	process
Key created	\Registry\Machine\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	msdt.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\TXSPDXMXCNY = "C:\\Program Files (x86)\\Anfd0\\Cookiesyz3du.exe"	msdt.exe

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of SendNotifyMessage
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
- Suspicious use of AdjustPrivilegeToken
- Drops file in Program Files directory
PID:2984

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\PO 17774.xls"
2⤵
- Suspicious use of SetWindowsHookEx
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Enumerates system info in registry
- Suspicious use of WriteProcessMemory
- Checks processor information in registry
PID:716

C:\Users\Public\svchost32.exe
"C:\Users\Public\svchost32.exe"
3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
- Executes dropped EXE
- Suspicious behavior: MapViewOfSection
PID:3188

C:\Users\Public\svchost32.exe
"C:\Users\Public\svchost32.exe"
4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetThreadContext
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious behavior: MapViewOfSection
PID:664

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:724

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:3528

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:3068

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:2408

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:2380

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:3364

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:3672

C:\Windows\SysWOW64\autochk.exe
"C:\Windows\SysWOW64\autochk.exe"
2⤵
PID:2528

C:\Windows\SysWOW64\autochk.exe
"C:\Windows\SysWOW64\autochk.exe"
2⤵
PID:3440

C:\Windows\SysWOW64\autochk.exe
"C:\Windows\SysWOW64\autochk.exe"
2⤵
PID:2504

C:\Windows\SysWOW64\autochk.exe
"C:\Windows\SysWOW64\autochk.exe"
2⤵
PID:2976

C:\Windows\SysWOW64\autochk.exe
"C:\Windows\SysWOW64\autochk.exe"
2⤵
PID:2532

C:\Windows\SysWOW64\autochk.exe
"C:\Windows\SysWOW64\autochk.exe"
2⤵
PID:2648

C:\Windows\SysWOW64\autochk.exe
"C:\Windows\SysWOW64\autochk.exe"
2⤵
PID:2844

C:\Windows\SysWOW64\msdt.exe
"C:\Windows\SysWOW64\msdt.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetThreadContext
- Modifies Internet Explorer settings
- Suspicious use of WriteProcessMemory
- Suspicious use of AdjustPrivilegeToken
- Suspicious behavior: MapViewOfSection
- Drops file in Program Files directory
- Adds Run key to start application
PID:3188

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Public\svchost32.exe"
3⤵
PID:644

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:1844

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:2076

C:\Program Files (x86)\Anfd0\Cookiesyz3du.exe
"C:\Program Files (x86)\Anfd0\Cookiesyz3du.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
- Executes dropped EXE
- Suspicious behavior: MapViewOfSection
PID:2788

C:\Program Files (x86)\Anfd0\Cookiesyz3du.exe
"C:\Program Files (x86)\Anfd0\Cookiesyz3du.exe"
3⤵
- Suspicious behavior: EnumeratesProcesses
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:708

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

2

T1112

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

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Downloads

C:\Program Files (x86)\Anfd0\Cookiesyz3du.exe

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C:\Program Files (x86)\Anfd0\Cookiesyz3du.exe

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C:\Program Files (x86)\Anfd0\Cookiesyz3du.exe

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C:\Users\Admin\AppData\Local\Temp\DB1

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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/644-14-0x0000000000000000-mapping.dmp

Download
memory/664-9-0x000000000041C220-mapping.dmp

Download
memory/664-8-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/708-27-0x000000000041C220-mapping.dmp

Download
memory/716-0-0x00000126E0DFB000-0x00000126E0E00000-memory.dmp

Filesize
20KB

Download
memory/716-2-0x00000126E0DFB000-0x00000126E0E00000-memory.dmp

Filesize
20KB

Download
memory/716-1-0x00000126E0DFB000-0x00000126E0E00000-memory.dmp

Filesize
20KB

Download
memory/716-3-0x00000126E0E00000-0x00000126E0E05000-memory.dmp

Filesize
20KB

Download
memory/716-4-0x00000126E0DFB000-0x00000126E0E00000-memory.dmp

Filesize
20KB

Download
memory/1844-16-0x0000000000000000-mapping.dmp

Download
memory/2076-22-0x00007FF66CCD0000-0x00007FF66CD63000-memory.dmp

Filesize
588KB

Download
memory/2076-19-0x0000000000000000-mapping.dmp

Download
memory/2076-20-0x00007FF66CCD0000-0x00007FF66CD63000-memory.dmp

Filesize
588KB

Download
memory/2076-21-0x00007FF66CCD0000-0x00007FF66CD63000-memory.dmp

Filesize
588KB

Download
memory/2788-23-0x0000000000000000-mapping.dmp

Download
memory/3188-13-0x00000000000A0000-0x0000000000213000-memory.dmp

Filesize
1.4MB

Download
memory/3188-18-0x00000000032A0000-0x00000000033A2000-memory.dmp

Filesize
1.0MB

Download
memory/3188-15-0x0000000005A20000-0x0000000005B52000-memory.dmp

Filesize
1.2MB

Download
memory/3188-12-0x00000000000A0000-0x0000000000213000-memory.dmp

Filesize
1.4MB

Download
memory/3188-11-0x0000000000000000-mapping.dmp

Download
memory/3188-5-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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