formbook | ca54e569e23be1e43ce626c3c1deba8dd70d1820b574ea6851ada7c453c62d92

General

Target

AWB 6299764041.docx
Size

10KB
MD5

2b0e4d8173d2821108074af1834246e9
SHA1

e3db8590c3e52d79d2546746b96b528fb5d2533c
SHA256

ca54e569e23be1e43ce626c3c1deba8dd70d1820b574ea6851ada7c453c62d92
SHA512

d4542e2a25ffc2d60b35c2b25db4c859cb714e6a017a894d11f87ad5a22cb575d5f7fe6eaecab14bc3307cc6cbbe13bc811acebc87d6b483ae123929425aa9b0

Score

10^/10

formbook rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

C2

http://www.skindulgenceatl.com/lth/

Decoy

sportstudio.store

taxes-info.com

cateringglasgow.com

onlineviolintutor.com

coaching-crisisempresarial.com

xn--tqq821aiik.net

thealhenab.com

buzinessmonk.com

radiobulnesonline.com

jp-service24x7.com

skylod.com

scriptures66.com

snoodyshields.com

curbsidecouriers.com

healthcare-partner.net

bbluedot3dwdshop.com

you-win-all.club

phenomenailshrj.com

gameplw.info

sableknight.com

Signatures

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

Formbook Payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/796-79-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral1/memory/796-80-0x000000000041EBC0-mapping.dmp	formbook
behavioral1/memory/2032-91-0x00000000000C0000-0x00000000000EE000-memory.dmp	formbook

Blocklisted process makes network request 1 IoCs

Processes:

EQNEDT32.EXE

flow pid process

9 1820 EQNEDT32.EXE
Downloads MZ/PE file
Executes dropped EXE 2 IoCs

Processes:

vbc.exevbc.exe

pid process

616 vbc.exe
796 vbc.exe

flow	pid	process
9	1820	EQNEDT32.EXE

pid	process
616	vbc.exe
796	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\http://37.120.206.70/buchi/b.wbk	WINWORD.EXE

Loads dropped DLL 4 IoCs

Processes:

EQNEDT32.EXE

pid process

1820 EQNEDT32.EXE
1820 EQNEDT32.EXE
1820 EQNEDT32.EXE
1820 EQNEDT32.EXE
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

pid	process
1820	EQNEDT32.EXE
1820	EQNEDT32.EXE
1820	EQNEDT32.EXE
1820	EQNEDT32.EXE

Suspicious use of SetThreadContext 4 IoCs

Processes:

vbc.exevbc.execmmon32.exe

description	pid	process	target process
PID 616 set thread context of 796	616	vbc.exe	vbc.exe
PID 796 set thread context of 1216	796	vbc.exe	Explorer.EXE
PID 796 set thread context of 1216	796	vbc.exe	Explorer.EXE
PID 2032 set thread context of 1216	2032	cmmon32.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

1820 EQNEDT32.EXE

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

pid	process
1820	EQNEDT32.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

Processes:

WINWORD.EXE

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	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
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
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\Toolbar	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\Se&nd to OneNote\Contexts = "55"	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

1856 WINWORD.EXE
Suspicious behavior: EnumeratesProcesses 7 IoCs

Processes:

vbc.exevbc.execmmon32.exe

pid process

616 vbc.exe
796 vbc.exe
796 vbc.exe
796 vbc.exe
2032 cmmon32.exe
2032 cmmon32.exe
2032 cmmon32.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

1216 Explorer.EXE
Suspicious behavior: MapViewOfSection 6 IoCs

Processes:

vbc.execmmon32.exe

pid process

796 vbc.exe
796 vbc.exe
796 vbc.exe
796 vbc.exe
2032 cmmon32.exe
2032 cmmon32.exe

pid	process
1856	WINWORD.EXE

pid	process
616	vbc.exe
796	vbc.exe
796	vbc.exe
796	vbc.exe
2032	cmmon32.exe
2032	cmmon32.exe
2032	cmmon32.exe

pid	process
1216	Explorer.EXE

pid	process
796	vbc.exe
796	vbc.exe
796	vbc.exe
796	vbc.exe
2032	cmmon32.exe
2032	cmmon32.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

WINWORD.EXEvbc.exevbc.execmmon32.exe

description	pid	process
Token: SeShutdownPrivilege	1856	WINWORD.EXE
Token: SeDebugPrivilege	616	vbc.exe
Token: SeDebugPrivilege	796	vbc.exe
Token: SeDebugPrivilege	2032	cmmon32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

WINWORD.EXE

pid process

1856 WINWORD.EXE
1856 WINWORD.EXE

pid	process
1856	WINWORD.EXE
1856	WINWORD.EXE

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

EQNEDT32.EXEWINWORD.EXEvbc.exeExplorer.EXEcmmon32.exe

description	pid	process	target process
PID 1820 wrote to memory of 616	1820	EQNEDT32.EXE	vbc.exe
PID 1820 wrote to memory of 616	1820	EQNEDT32.EXE	vbc.exe
PID 1820 wrote to memory of 616	1820	EQNEDT32.EXE	vbc.exe
PID 1820 wrote to memory of 616	1820	EQNEDT32.EXE	vbc.exe
PID 1856 wrote to memory of 912	1856	WINWORD.EXE	splwow64.exe
PID 1856 wrote to memory of 912	1856	WINWORD.EXE	splwow64.exe
PID 1856 wrote to memory of 912	1856	WINWORD.EXE	splwow64.exe
PID 1856 wrote to memory of 912	1856	WINWORD.EXE	splwow64.exe
PID 616 wrote to memory of 796	616	vbc.exe	vbc.exe
PID 616 wrote to memory of 796	616	vbc.exe	vbc.exe
PID 616 wrote to memory of 796	616	vbc.exe	vbc.exe
PID 616 wrote to memory of 796	616	vbc.exe	vbc.exe
PID 616 wrote to memory of 796	616	vbc.exe	vbc.exe
PID 616 wrote to memory of 796	616	vbc.exe	vbc.exe
PID 616 wrote to memory of 796	616	vbc.exe	vbc.exe
PID 1216 wrote to memory of 2032	1216	Explorer.EXE	cmmon32.exe
PID 1216 wrote to memory of 2032	1216	Explorer.EXE	cmmon32.exe
PID 1216 wrote to memory of 2032	1216	Explorer.EXE	cmmon32.exe
PID 1216 wrote to memory of 2032	1216	Explorer.EXE	cmmon32.exe
PID 2032 wrote to memory of 1580	2032	cmmon32.exe	cmd.exe
PID 2032 wrote to memory of 1580	2032	cmmon32.exe	cmd.exe
PID 2032 wrote to memory of 1580	2032	cmmon32.exe	cmd.exe
PID 2032 wrote to memory of 1580	2032	cmmon32.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:1216

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\AWB 6299764041.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:1856

C:\Windows\splwow64.exe
C:\Windows\splwow64.exe 12288
3⤵
PID:912

C:\Windows\SysWOW64\cmmon32.exe
"C:\Windows\SysWOW64\cmmon32.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2032

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Public\vbc.exe"
3⤵
PID:1580

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:1820

C:\Users\Public\vbc.exe
"C:\Users\Public\vbc.exe"
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:616

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
PID:796

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
17da7e0d12fbfd1c14aafae7c0b41e33

SHA1
07da86cf58a0ed8cb06f4f5a1c64d4a376aa0c4b

SHA256
81da76220fb0ae253e2cb1708b5b69da345ed3f69fca6d5bda7a0f59470196fe

SHA512
ed36d6be9575fba6ab696ef42af941410c2788dc65136bec7e1b03c6abdfa6c2e0d5345c60c6297ef46c2d8080e3c0943b333b1d473e5c0013a4f8fb91d497da

Download Submit
C:\Users\Public\vbc.exe
MD5
17da7e0d12fbfd1c14aafae7c0b41e33

SHA1
07da86cf58a0ed8cb06f4f5a1c64d4a376aa0c4b

SHA256
81da76220fb0ae253e2cb1708b5b69da345ed3f69fca6d5bda7a0f59470196fe

SHA512
ed36d6be9575fba6ab696ef42af941410c2788dc65136bec7e1b03c6abdfa6c2e0d5345c60c6297ef46c2d8080e3c0943b333b1d473e5c0013a4f8fb91d497da

Download Submit
C:\Users\Public\vbc.exe
MD5
17da7e0d12fbfd1c14aafae7c0b41e33

SHA1
07da86cf58a0ed8cb06f4f5a1c64d4a376aa0c4b

SHA256
81da76220fb0ae253e2cb1708b5b69da345ed3f69fca6d5bda7a0f59470196fe

SHA512
ed36d6be9575fba6ab696ef42af941410c2788dc65136bec7e1b03c6abdfa6c2e0d5345c60c6297ef46c2d8080e3c0943b333b1d473e5c0013a4f8fb91d497da

Download Submit
\Users\Public\vbc.exe
MD5
17da7e0d12fbfd1c14aafae7c0b41e33

SHA1
07da86cf58a0ed8cb06f4f5a1c64d4a376aa0c4b

SHA256
81da76220fb0ae253e2cb1708b5b69da345ed3f69fca6d5bda7a0f59470196fe

SHA512
ed36d6be9575fba6ab696ef42af941410c2788dc65136bec7e1b03c6abdfa6c2e0d5345c60c6297ef46c2d8080e3c0943b333b1d473e5c0013a4f8fb91d497da

Download Submit
\Users\Public\vbc.exe
MD5
17da7e0d12fbfd1c14aafae7c0b41e33

SHA1
07da86cf58a0ed8cb06f4f5a1c64d4a376aa0c4b

SHA256
81da76220fb0ae253e2cb1708b5b69da345ed3f69fca6d5bda7a0f59470196fe

SHA512
ed36d6be9575fba6ab696ef42af941410c2788dc65136bec7e1b03c6abdfa6c2e0d5345c60c6297ef46c2d8080e3c0943b333b1d473e5c0013a4f8fb91d497da

Download Submit
\Users\Public\vbc.exe
MD5
17da7e0d12fbfd1c14aafae7c0b41e33

SHA1
07da86cf58a0ed8cb06f4f5a1c64d4a376aa0c4b

SHA256
81da76220fb0ae253e2cb1708b5b69da345ed3f69fca6d5bda7a0f59470196fe

SHA512
ed36d6be9575fba6ab696ef42af941410c2788dc65136bec7e1b03c6abdfa6c2e0d5345c60c6297ef46c2d8080e3c0943b333b1d473e5c0013a4f8fb91d497da

Download Submit
\Users\Public\vbc.exe
MD5
17da7e0d12fbfd1c14aafae7c0b41e33

SHA1
07da86cf58a0ed8cb06f4f5a1c64d4a376aa0c4b

SHA256
81da76220fb0ae253e2cb1708b5b69da345ed3f69fca6d5bda7a0f59470196fe

SHA512
ed36d6be9575fba6ab696ef42af941410c2788dc65136bec7e1b03c6abdfa6c2e0d5345c60c6297ef46c2d8080e3c0943b333b1d473e5c0013a4f8fb91d497da

Download Submit
memory/616-74-0x00000000005F0000-0x000000000060E000-memory.dmp

Filesize
120KB

Download
memory/616-67-0x0000000000000000-mapping.dmp

Download
memory/616-70-0x0000000001040000-0x0000000001041000-memory.dmp

Filesize
4KB

Download
memory/616-75-0x0000000004DD0000-0x0000000004DD1000-memory.dmp

Filesize
4KB

Download
memory/616-77-0x0000000005160000-0x00000000051E8000-memory.dmp

Filesize
544KB

Download
memory/616-78-0x0000000000B90000-0x0000000000BD1000-memory.dmp

Filesize
260KB

Download
memory/796-83-0x00000000008D0000-0x0000000000BD3000-memory.dmp

Filesize
3.0MB

Download
memory/796-84-0x0000000000190000-0x00000000001A4000-memory.dmp

Filesize
80KB

Download
memory/796-80-0x000000000041EBC0-mapping.dmp

Download
memory/796-86-0x00000000001E0000-0x00000000001F4000-memory.dmp

Filesize
80KB

Download
memory/796-79-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/912-72-0x0000000000000000-mapping.dmp

Download
memory/912-73-0x000007FEFB591000-0x000007FEFB593000-memory.dmp

Filesize
8KB

Download
memory/1216-85-0x0000000004AA0000-0x0000000004B67000-memory.dmp

Filesize
796KB

Download
memory/1216-94-0x0000000004E90000-0x0000000004F51000-memory.dmp

Filesize
772KB

Download
memory/1216-87-0x0000000004C70000-0x0000000004D5F000-memory.dmp

Filesize
956KB

Download
memory/1580-89-0x0000000000000000-mapping.dmp

Download
memory/1820-62-0x00000000752B1000-0x00000000752B3000-memory.dmp

Filesize
8KB

Download
memory/1856-61-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1856-59-0x0000000072141000-0x0000000072144000-memory.dmp

Filesize
12KB

Download
memory/1856-60-0x000000006FBC1000-0x000000006FBC3000-memory.dmp

Filesize
8KB

Download
memory/1856-76-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/2032-88-0x0000000000000000-mapping.dmp

Download
memory/2032-91-0x00000000000C0000-0x00000000000EE000-memory.dmp

Filesize
184KB

Download
memory/2032-92-0x0000000001FB0000-0x00000000022B3000-memory.dmp

Filesize
3.0MB

Download
memory/2032-90-0x0000000000BA0000-0x0000000000BAD000-memory.dmp

Filesize
52KB

Download
memory/2032-93-0x0000000000A10000-0x0000000000AA3000-memory.dmp

Filesize
588KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads