formbook | ea6f660d6c4499c7a446ac3bfde1cd02bd74dfe9194fd16e5c876d5c38ff56ca

General

Target

Evaluation quoter.docx
Size

10KB
MD5

2c30e2c8829b2dce3aeebe20182b7be4
SHA1

9ce579b42d60563fcb85f6e2e9d7aa32a985d386
SHA256

ea6f660d6c4499c7a446ac3bfde1cd02bd74dfe9194fd16e5c876d5c38ff56ca
SHA512

a62f890137a55f5c38085272475028f6510ee3f2717a638861a94ef7d2d3c8b2c7511080413bd6ad804015139b0d77765000d75276f5b99a36ad8a0dd3df3581

Score

10^/10

formbook rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

C2

http://www.unclechef.website/pmc/

Decoy

poolbuilderhighlandpark.com

zgqcmrdswlw.com

rivalrepublic.net

vowseries.com

papmbeachcountymusic.com

unitedmarguisa.com

sparetimr.net

mmmfccynp.icu

blossom123.com

rkd6.com

luewhhedre.com

rwproducedeliveryknoxville.com

bqg5000.com

xn--jvrr98g37n88d.com

15slotozlo.site

experthairstylist.site

udalastar.com

avenstoredetailing.com

americanmicron.com

fineprintlaw.com

Signatures

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

Formbook Payload 4 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/280-69-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral1/memory/280-70-0x000000000041EBC0-mapping.dmp	formbook
behavioral1/memory/1032-73-0x00000000002B0000-0x00000000002DF000-memory.dmp	formbook
behavioral1/memory/1032-84-0x0000000000090000-0x00000000000BE000-memory.dmp	formbook

Blocklisted process makes network request 1 IoCs

Processes:

EQNEDT32.EXE

flow pid process

14 596 EQNEDT32.EXE
Downloads MZ/PE file
Executes dropped EXE 2 IoCs

Processes:

vbc.exevbc.exe

pid process

1032 vbc.exe
280 vbc.exe

flow	pid	process
14	596	EQNEDT32.EXE

pid	process
1032	vbc.exe
280	vbc.exe

Abuses OpenXML format to download file from external location 2 IoCs

Processes:

WINWORD.EXE

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\Toolbar	WINWORD.EXE
Key opened	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Office\Common\Offline\Files\https://is.gd/EAkEcx	WINWORD.EXE

Loads dropped DLL 2 IoCs

Processes:

EQNEDT32.EXE

pid process

596 EQNEDT32.EXE
596 EQNEDT32.EXE
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

pid	process
596	EQNEDT32.EXE
596	EQNEDT32.EXE

Suspicious use of SetThreadContext 4 IoCs

Processes:

vbc.exevbc.execmstp.exe

description	pid	process	target process
PID 1032 set thread context of 280	1032	vbc.exe	vbc.exe
PID 280 set thread context of 1292	280	vbc.exe	Explorer.EXE
PID 280 set thread context of 1292	280	vbc.exe	Explorer.EXE
PID 1032 set thread context of 1292	1032	cmstp.exe	Explorer.EXE

Drops file in Windows directory 1 IoCs

Processes:

WINWORD.EXE

description ioc process

File opened for modification C:\Windows\Debug\WIA\wiatrace.log WINWORD.EXE
Office loads VBA resources, possible macro or embedded object present
Launches Equation Editor 1 TTPs 1 IoCs
Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.
exploit

Exploitation for Client Execution
T1203

Processes:

EQNEDT32.EXE

pid process

596 EQNEDT32.EXE

description	ioc	process
File opened for modification	C:\Windows\Debug\WIA\wiatrace.log	WINWORD.EXE

pid	process
596	EQNEDT32.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

Processes:

WINWORD.EXE

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\Toolbar	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	WINWORD.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	WINWORD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

WINWORD.EXE

pid process

1116 WINWORD.EXE

pid	process
1116	WINWORD.EXE

Suspicious behavior: EnumeratesProcesses 28 IoCs

Processes:

vbc.execmstp.exe

pid	process
280	vbc.exe
280	vbc.exe
280	vbc.exe
1032	cmstp.exe
1032	cmstp.exe
1032	cmstp.exe
1032	cmstp.exe
1032	cmstp.exe
1032	cmstp.exe
1032	cmstp.exe
1032	cmstp.exe
1032	cmstp.exe
1032	cmstp.exe
1032	cmstp.exe
1032	cmstp.exe
1032	cmstp.exe
1032	cmstp.exe
1032	cmstp.exe
1032	cmstp.exe
1032	cmstp.exe
1032	cmstp.exe
1032	cmstp.exe
1032	cmstp.exe
1032	cmstp.exe
1032	cmstp.exe
1032	cmstp.exe
1032	cmstp.exe
1032	cmstp.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

1292 Explorer.EXE
Suspicious behavior: MapViewOfSection 6 IoCs

Processes:

vbc.execmstp.exe

pid process

280 vbc.exe
280 vbc.exe
280 vbc.exe
280 vbc.exe
1032 cmstp.exe
1032 cmstp.exe

pid	process
1292	Explorer.EXE

Suspicious use of AdjustPrivilegeToken 9 IoCs

Processes:

vbc.exeExplorer.EXEcmstp.exeWINWORD.EXE

description	pid	process
Token: SeDebugPrivilege	280	vbc.exe
Token: SeShutdownPrivilege	1292	Explorer.EXE
Token: SeShutdownPrivilege	1292	Explorer.EXE
Token: SeShutdownPrivilege	1292	Explorer.EXE
Token: SeShutdownPrivilege	1292	Explorer.EXE
Token: SeDebugPrivilege	1032	cmstp.exe
Token: SeShutdownPrivilege	1292	Explorer.EXE
Token: SeShutdownPrivilege	1292	Explorer.EXE
Token: SeShutdownPrivilege	1116	WINWORD.EXE

Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

Explorer.EXE

pid process

1292 Explorer.EXE
1292 Explorer.EXE
1292 Explorer.EXE
1292 Explorer.EXE
Suspicious use of SendNotifyMessage 4 IoCs

Processes:

Explorer.EXE

pid process

1292 Explorer.EXE
1292 Explorer.EXE
1292 Explorer.EXE
1292 Explorer.EXE
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

WINWORD.EXE

pid process

1116 WINWORD.EXE
1116 WINWORD.EXE

pid	process
1292	Explorer.EXE
1292	Explorer.EXE
1292	Explorer.EXE
1292	Explorer.EXE

pid	process
1292	Explorer.EXE
1292	Explorer.EXE
1292	Explorer.EXE
1292	Explorer.EXE

pid	process
1116	WINWORD.EXE
1116	WINWORD.EXE

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

EQNEDT32.EXEWINWORD.EXEvbc.exevbc.execmstp.exe

description	pid	process	target process
PID 596 wrote to memory of 1032	596	EQNEDT32.EXE	vbc.exe
PID 596 wrote to memory of 1032	596	EQNEDT32.EXE	vbc.exe
PID 596 wrote to memory of 1032	596	EQNEDT32.EXE	vbc.exe
PID 596 wrote to memory of 1032	596	EQNEDT32.EXE	vbc.exe
PID 1116 wrote to memory of 1308	1116	WINWORD.EXE	splwow64.exe
PID 1116 wrote to memory of 1308	1116	WINWORD.EXE	splwow64.exe
PID 1116 wrote to memory of 1308	1116	WINWORD.EXE	splwow64.exe
PID 1116 wrote to memory of 1308	1116	WINWORD.EXE	splwow64.exe
PID 1032 wrote to memory of 280	1032	vbc.exe	vbc.exe
PID 1032 wrote to memory of 280	1032	vbc.exe	vbc.exe
PID 1032 wrote to memory of 280	1032	vbc.exe	vbc.exe
PID 1032 wrote to memory of 280	1032	vbc.exe	vbc.exe
PID 1032 wrote to memory of 280	1032	vbc.exe	vbc.exe
PID 1032 wrote to memory of 280	1032	vbc.exe	vbc.exe
PID 1032 wrote to memory of 280	1032	vbc.exe	vbc.exe
PID 280 wrote to memory of 1032	280	vbc.exe	cmstp.exe
PID 280 wrote to memory of 1032	280	vbc.exe	cmstp.exe
PID 280 wrote to memory of 1032	280	vbc.exe	cmstp.exe
PID 280 wrote to memory of 1032	280	vbc.exe	cmstp.exe
PID 280 wrote to memory of 1032	280	vbc.exe	cmstp.exe
PID 280 wrote to memory of 1032	280	vbc.exe	cmstp.exe
PID 280 wrote to memory of 1032	280	vbc.exe	cmstp.exe
PID 1032 wrote to memory of 940	1032	cmstp.exe	cmd.exe
PID 1032 wrote to memory of 940	1032	cmstp.exe	cmd.exe
PID 1032 wrote to memory of 940	1032	cmstp.exe	cmd.exe
PID 1032 wrote to memory of 940	1032	cmstp.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:1292

C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\Evaluation quoter.docx"
2⤵
- Abuses OpenXML format to download file from external location
- Drops file in Windows directory
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1116

C:\Windows\splwow64.exe
C:\Windows\splwow64.exe 12288
3⤵
PID:1308

C:\Windows\SysWOW64\autochk.exe
"C:\Windows\SysWOW64\autochk.exe"
2⤵
PID:1692

C:\Windows\SysWOW64\autochk.exe
"C:\Windows\SysWOW64\autochk.exe"
2⤵
PID:1104

C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
"C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
1⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Launches Equation Editor
- Suspicious use of WriteProcessMemory
PID:596

C:\Users\Public\vbc.exe
"C:\Users\Public\vbc.exe"
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1032

C:\Users\Public\vbc.exe
"C:\Users\Public\vbc.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:280

C:\Windows\SysWOW64\cmstp.exe
"C:\Windows\SysWOW64\cmstp.exe"
4⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1032

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Public\vbc.exe"
5⤵
PID:940

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scripting

1

T1064

Exploitation for Client Execution

1

T1203

Persistence

Privilege Escalation

Defense Evasion

Scripting

1

T1064

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Public\vbc.exe
MD5
ea4f3cbb2f990be8628145b8e7970880

SHA1
ac7f5816b67da252195cf1fc04347e30b71ec0d0

SHA256
554853af78e123ea4831b732cafddd36d29441188bb9c825ad662eae0d2d215a

SHA512
b88306e8069c723cbfb1bcc4b0715ddb5297fb751c1337cea5aa0ec36e0d04b026a7a1eb6854b4279a3689dbf729166490b88df24fc2a370e5cc52906762b72f

Download Submit
C:\Users\Public\vbc.exe
MD5
ea4f3cbb2f990be8628145b8e7970880

SHA1
ac7f5816b67da252195cf1fc04347e30b71ec0d0

SHA256
554853af78e123ea4831b732cafddd36d29441188bb9c825ad662eae0d2d215a

SHA512
b88306e8069c723cbfb1bcc4b0715ddb5297fb751c1337cea5aa0ec36e0d04b026a7a1eb6854b4279a3689dbf729166490b88df24fc2a370e5cc52906762b72f

Download Submit
C:\Users\Public\vbc.exe
MD5
ea4f3cbb2f990be8628145b8e7970880

SHA1
ac7f5816b67da252195cf1fc04347e30b71ec0d0

SHA256
554853af78e123ea4831b732cafddd36d29441188bb9c825ad662eae0d2d215a

SHA512
b88306e8069c723cbfb1bcc4b0715ddb5297fb751c1337cea5aa0ec36e0d04b026a7a1eb6854b4279a3689dbf729166490b88df24fc2a370e5cc52906762b72f

Download Submit
\Users\Public\vbc.exe
MD5
ea4f3cbb2f990be8628145b8e7970880

SHA1
ac7f5816b67da252195cf1fc04347e30b71ec0d0

SHA256
554853af78e123ea4831b732cafddd36d29441188bb9c825ad662eae0d2d215a

SHA512
b88306e8069c723cbfb1bcc4b0715ddb5297fb751c1337cea5aa0ec36e0d04b026a7a1eb6854b4279a3689dbf729166490b88df24fc2a370e5cc52906762b72f

Download Submit
\Users\Public\vbc.exe
MD5
ea4f3cbb2f990be8628145b8e7970880

SHA1
ac7f5816b67da252195cf1fc04347e30b71ec0d0

SHA256
554853af78e123ea4831b732cafddd36d29441188bb9c825ad662eae0d2d215a

SHA512
b88306e8069c723cbfb1bcc4b0715ddb5297fb751c1337cea5aa0ec36e0d04b026a7a1eb6854b4279a3689dbf729166490b88df24fc2a370e5cc52906762b72f

Download Submit
memory/280-70-0x000000000041EBC0-mapping.dmp

Download
memory/280-78-0x0000000000390000-0x00000000003A4000-memory.dmp

Filesize
80KB

Download
memory/280-76-0x0000000000330000-0x0000000000344000-memory.dmp

Filesize
80KB

Download
memory/280-75-0x0000000000750000-0x0000000000A53000-memory.dmp

Filesize
3.0MB

Download
memory/280-69-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/596-62-0x00000000767B1000-0x00000000767B3000-memory.dmp

Filesize
8KB

Download
memory/940-82-0x0000000000000000-mapping.dmp

Download
memory/1032-85-0x0000000002010000-0x0000000002313000-memory.dmp

Filesize
3.0MB

Download
memory/1032-83-0x0000000000790000-0x00000000007A8000-memory.dmp

Filesize
96KB

Download
memory/1032-73-0x00000000002B0000-0x00000000002DF000-memory.dmp

Filesize
188KB

Download
memory/1032-65-0x0000000000000000-mapping.dmp

Download
memory/1032-80-0x0000000000000000-mapping.dmp

Download
memory/1032-86-0x00000000003B0000-0x0000000000443000-memory.dmp

Filesize
588KB

Download
memory/1032-84-0x0000000000090000-0x00000000000BE000-memory.dmp

Filesize
184KB

Download
memory/1116-61-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1116-59-0x0000000072E01000-0x0000000072E04000-memory.dmp

Filesize
12KB

Download
memory/1116-60-0x0000000070881000-0x0000000070883000-memory.dmp

Filesize
8KB

Download
memory/1116-88-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1292-79-0x0000000006C20000-0x0000000006D93000-memory.dmp

Filesize
1.4MB

Download
memory/1292-77-0x0000000004740000-0x00000000048DD000-memory.dmp

Filesize
1.6MB

Download
memory/1292-87-0x0000000006DA0000-0x0000000006EAD000-memory.dmp

Filesize
1.1MB

Download
memory/1308-72-0x000007FEFC301000-0x000007FEFC303000-memory.dmp

Filesize
8KB

Download
memory/1308-67-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads