formbook | e030587e4c5e9109c8e7647da36ffa7ba97b0ee1a1a1039ee7cb1f0927d3e14b

General

Target

PO523.docx
Size

10KB
MD5

e4afa614fdf22dbbbc6827eaae382588
SHA1

68169a695313e88ef1e8f55ece0652ec592c85f4
SHA256

e030587e4c5e9109c8e7647da36ffa7ba97b0ee1a1a1039ee7cb1f0927d3e14b
SHA512

47b7a48b530dff2b412db333a358c90627cb3a55de82ba576ab410f3bd4813616f1371e37037bda58ca061d1eddd3a0b30f79f4df3340e403ddc0ca21f7b258a

Score

10^/10

formbook rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

C2

http://www.girlsnightbag.com/dms/

Decoy

commachic.com

accessremits.com

dopefight.com

awdinfo.com

nguyenanhnhat.com

mailposse.com

teachingpart-time.com

nurseryhost.com

creamstudiosmedellin.com

analisisproject.com

sanfranciscotraining.com

elitestatusconsulting.com

liguosucai.com

aterrior.com

estudiowoodpecker.com

float10x10.com

sbcforward.info

beyondthetrench.com

pavingllc.com

womensspecialcare.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/1380-79-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral1/memory/1380-80-0x000000000041EC20-mapping.dmp	formbook
behavioral1/memory/1672-89-0x0000000000080000-0x00000000000AE000-memory.dmp	formbook

Blocklisted process makes network request 1 IoCs

Processes:

EQNEDT32.EXE

flow pid process

9 1108 EQNEDT32.EXE
Downloads MZ/PE file
Executes dropped EXE 2 IoCs

Processes:

vbc.exevbc.exe

pid process

1056 vbc.exe
1380 vbc.exe

flow	pid	process
9	1108	EQNEDT32.EXE

pid	process
1056	vbc.exe
1380	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/Mend/m.wbk	WINWORD.EXE

Loads dropped DLL 4 IoCs

Processes:

EQNEDT32.EXE

pid process

1108 EQNEDT32.EXE
1108 EQNEDT32.EXE
1108 EQNEDT32.EXE
1108 EQNEDT32.EXE
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

pid	process
1108	EQNEDT32.EXE
1108	EQNEDT32.EXE
1108	EQNEDT32.EXE
1108	EQNEDT32.EXE

Suspicious use of SetThreadContext 3 IoCs

Processes:

vbc.exevbc.exewininit.exe

description	pid	process	target process
PID 1056 set thread context of 1380	1056	vbc.exe	vbc.exe
PID 1380 set thread context of 1208	1380	vbc.exe	Explorer.EXE
PID 1672 set thread context of 1208	1672	wininit.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

1108 EQNEDT32.EXE

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

pid	process
1108	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
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
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
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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

WINWORD.EXE

pid process

1656 WINWORD.EXE
Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

vbc.exevbc.exewininit.exe

pid process

1056 vbc.exe
1380 vbc.exe
1380 vbc.exe
1672 wininit.exe
1672 wininit.exe
1672 wininit.exe
1672 wininit.exe
1672 wininit.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

1208 Explorer.EXE
Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

vbc.exewininit.exe

pid process

1380 vbc.exe
1380 vbc.exe
1380 vbc.exe
1672 wininit.exe
1672 wininit.exe

pid	process
1656	WINWORD.EXE

pid	process
1056	vbc.exe
1380	vbc.exe
1380	vbc.exe
1672	wininit.exe
1672	wininit.exe
1672	wininit.exe
1672	wininit.exe
1672	wininit.exe

pid	process
1208	Explorer.EXE

pid	process
1380	vbc.exe
1380	vbc.exe
1380	vbc.exe
1672	wininit.exe
1672	wininit.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

WINWORD.EXEvbc.exevbc.exewininit.exe

description	pid	process
Token: SeShutdownPrivilege	1656	WINWORD.EXE
Token: SeDebugPrivilege	1056	vbc.exe
Token: SeDebugPrivilege	1380	vbc.exe
Token: SeDebugPrivilege	1672	wininit.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

WINWORD.EXE

pid process

1656 WINWORD.EXE
1656 WINWORD.EXE

pid	process
1656	WINWORD.EXE
1656	WINWORD.EXE

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

EQNEDT32.EXEWINWORD.EXEvbc.exeExplorer.EXEwininit.exe

description	pid	process	target process
PID 1108 wrote to memory of 1056	1108	EQNEDT32.EXE	vbc.exe
PID 1108 wrote to memory of 1056	1108	EQNEDT32.EXE	vbc.exe
PID 1108 wrote to memory of 1056	1108	EQNEDT32.EXE	vbc.exe
PID 1108 wrote to memory of 1056	1108	EQNEDT32.EXE	vbc.exe
PID 1656 wrote to memory of 1552	1656	WINWORD.EXE	splwow64.exe
PID 1656 wrote to memory of 1552	1656	WINWORD.EXE	splwow64.exe
PID 1656 wrote to memory of 1552	1656	WINWORD.EXE	splwow64.exe
PID 1656 wrote to memory of 1552	1656	WINWORD.EXE	splwow64.exe
PID 1056 wrote to memory of 1380	1056	vbc.exe	vbc.exe
PID 1056 wrote to memory of 1380	1056	vbc.exe	vbc.exe
PID 1056 wrote to memory of 1380	1056	vbc.exe	vbc.exe
PID 1056 wrote to memory of 1380	1056	vbc.exe	vbc.exe
PID 1056 wrote to memory of 1380	1056	vbc.exe	vbc.exe
PID 1056 wrote to memory of 1380	1056	vbc.exe	vbc.exe
PID 1056 wrote to memory of 1380	1056	vbc.exe	vbc.exe
PID 1208 wrote to memory of 1672	1208	Explorer.EXE	wininit.exe
PID 1208 wrote to memory of 1672	1208	Explorer.EXE	wininit.exe
PID 1208 wrote to memory of 1672	1208	Explorer.EXE	wininit.exe
PID 1208 wrote to memory of 1672	1208	Explorer.EXE	wininit.exe
PID 1672 wrote to memory of 1840	1672	wininit.exe	cmd.exe
PID 1672 wrote to memory of 1840	1672	wininit.exe	cmd.exe
PID 1672 wrote to memory of 1840	1672	wininit.exe	cmd.exe
PID 1672 wrote to memory of 1840	1672	wininit.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:1208

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\PO523.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:1656

C:\Windows\splwow64.exe
C:\Windows\splwow64.exe 12288
3⤵
PID:1552

C:\Windows\SysWOW64\wininit.exe
"C:\Windows\SysWOW64\wininit.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1672

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Public\vbc.exe"
3⤵
PID:1840

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:1108

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:1056

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:1380

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

Replay Monitor

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Downloads

C:\Users\Public\vbc.exe
MD5
af48e96aad0bbe98474261f6b2e98a49

SHA1
989fdbbb07399a9655719b12d2f432c9af5d247f

SHA256
eca743d09cc8551e9695be6fd6a7366db1751eac8872b6a3f384e61b56d0f25b

SHA512
8ae6569004532d26b348db297e8f567844f05dbd61a4e6c8959d6de515f28c7f8fea120f7689eb6d8883eb597e989afb1d7bdeeff4891d088ef2900fcd389bf5

Download Submit
C:\Users\Public\vbc.exe
MD5
af48e96aad0bbe98474261f6b2e98a49

SHA1
989fdbbb07399a9655719b12d2f432c9af5d247f

SHA256
eca743d09cc8551e9695be6fd6a7366db1751eac8872b6a3f384e61b56d0f25b

SHA512
8ae6569004532d26b348db297e8f567844f05dbd61a4e6c8959d6de515f28c7f8fea120f7689eb6d8883eb597e989afb1d7bdeeff4891d088ef2900fcd389bf5

Download Submit
C:\Users\Public\vbc.exe
MD5
af48e96aad0bbe98474261f6b2e98a49

SHA1
989fdbbb07399a9655719b12d2f432c9af5d247f

SHA256
eca743d09cc8551e9695be6fd6a7366db1751eac8872b6a3f384e61b56d0f25b

SHA512
8ae6569004532d26b348db297e8f567844f05dbd61a4e6c8959d6de515f28c7f8fea120f7689eb6d8883eb597e989afb1d7bdeeff4891d088ef2900fcd389bf5

Download Submit
\Users\Public\vbc.exe
MD5
af48e96aad0bbe98474261f6b2e98a49

SHA1
989fdbbb07399a9655719b12d2f432c9af5d247f

SHA256
eca743d09cc8551e9695be6fd6a7366db1751eac8872b6a3f384e61b56d0f25b

SHA512
8ae6569004532d26b348db297e8f567844f05dbd61a4e6c8959d6de515f28c7f8fea120f7689eb6d8883eb597e989afb1d7bdeeff4891d088ef2900fcd389bf5

Download Submit
\Users\Public\vbc.exe
MD5
af48e96aad0bbe98474261f6b2e98a49

SHA1
989fdbbb07399a9655719b12d2f432c9af5d247f

SHA256
eca743d09cc8551e9695be6fd6a7366db1751eac8872b6a3f384e61b56d0f25b

SHA512
8ae6569004532d26b348db297e8f567844f05dbd61a4e6c8959d6de515f28c7f8fea120f7689eb6d8883eb597e989afb1d7bdeeff4891d088ef2900fcd389bf5

Download Submit
\Users\Public\vbc.exe
MD5
af48e96aad0bbe98474261f6b2e98a49

SHA1
989fdbbb07399a9655719b12d2f432c9af5d247f

SHA256
eca743d09cc8551e9695be6fd6a7366db1751eac8872b6a3f384e61b56d0f25b

SHA512
8ae6569004532d26b348db297e8f567844f05dbd61a4e6c8959d6de515f28c7f8fea120f7689eb6d8883eb597e989afb1d7bdeeff4891d088ef2900fcd389bf5

Download Submit
\Users\Public\vbc.exe
MD5
af48e96aad0bbe98474261f6b2e98a49

SHA1
989fdbbb07399a9655719b12d2f432c9af5d247f

SHA256
eca743d09cc8551e9695be6fd6a7366db1751eac8872b6a3f384e61b56d0f25b

SHA512
8ae6569004532d26b348db297e8f567844f05dbd61a4e6c8959d6de515f28c7f8fea120f7689eb6d8883eb597e989afb1d7bdeeff4891d088ef2900fcd389bf5

Download Submit
memory/1056-74-0x00000000005A0000-0x00000000005BE000-memory.dmp

Filesize
120KB

Download
memory/1056-67-0x0000000000000000-mapping.dmp

Download
memory/1056-78-0x0000000002090000-0x00000000020D1000-memory.dmp

Filesize
260KB

Download
memory/1056-70-0x0000000000A10000-0x0000000000A11000-memory.dmp

Filesize
4KB

Download
memory/1056-77-0x0000000005130000-0x00000000051B6000-memory.dmp

Filesize
536KB

Download
memory/1056-75-0x0000000004E20000-0x0000000004E21000-memory.dmp

Filesize
4KB

Download
memory/1108-62-0x0000000074F31000-0x0000000074F33000-memory.dmp

Filesize
8KB

Download
memory/1208-85-0x0000000004400000-0x00000000044F8000-memory.dmp

Filesize
992KB

Download
memory/1208-92-0x0000000004D30000-0x0000000004E56000-memory.dmp

Filesize
1.1MB

Download
memory/1380-83-0x0000000000B40000-0x0000000000E43000-memory.dmp

Filesize
3.0MB

Download
memory/1380-80-0x000000000041EC20-mapping.dmp

Download
memory/1380-79-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/1380-84-0x00000000001D0000-0x00000000001E4000-memory.dmp

Filesize
80KB

Download
memory/1552-72-0x0000000000000000-mapping.dmp

Download
memory/1552-73-0x000007FEFBA81000-0x000007FEFBA83000-memory.dmp

Filesize
8KB

Download
memory/1656-59-0x0000000072491000-0x0000000072494000-memory.dmp

Filesize
12KB

Download
memory/1656-60-0x000000006FF11000-0x000000006FF13000-memory.dmp

Filesize
8KB

Download
memory/1656-61-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1656-76-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1672-86-0x0000000000000000-mapping.dmp

Download
memory/1672-88-0x0000000000480000-0x000000000049A000-memory.dmp

Filesize
104KB

Download
memory/1672-89-0x0000000000080000-0x00000000000AE000-memory.dmp

Filesize
184KB

Download
memory/1672-90-0x0000000001E90000-0x0000000002193000-memory.dmp

Filesize
3.0MB

Download
memory/1672-91-0x0000000002240000-0x00000000022D3000-memory.dmp

Filesize
588KB

Download
memory/1840-87-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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