formbook | b8f509962aeb090743d2982087ce11853df912f24190158d11d08e6081c17fce

General

Target

inquiry10204168.xlsx
Size

1.3MB
MD5

78858bd1cc5cbb75c6173d867284b52b
SHA1

198e3be4d2334c898a97c0fa05c52c50369c42d3
SHA256

b8f509962aeb090743d2982087ce11853df912f24190158d11d08e6081c17fce
SHA512

27e410599098b11e8ba5ea6d554699720d9dc8ba303582511b7ab1d1b20bd36dbcaff1fe13f790db2eb0f01c14c76a2490b69c27e93eecc211cd0e0181d988d6

Score

10^/10

formbook rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

C2

http://www.zglvyouzaixian.com/nki/

Decoy

igo-digiworld.com

infrahiit.com

herhealingwater.com

inspiredbytradition.com

onlinepropertyworld.com

rvwdj.com

mudahbikinsuhi.online

multipleofferonline.com

striveyouthministry.com

affectiveneuro.net

f21m.com

perfumefashion.icu

instantcash4rvs.com

help-verifiedbadge.com

solomonislandsblog.com

vipshoppingwizard.com

doggybargains.com

fjyaoxi.net

luxpropertyandassociates.com

companyfinders.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/1828-15-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral1/memory/1828-16-0x000000000041EB70-mapping.dmp	formbook
behavioral1/memory/1728-19-0x0000000000000000-mapping.dmp	formbook

Blocklisted process makes network request 1 IoCs

Processes:

EQNEDT32.EXE

flow pid process

7 1576 EQNEDT32.EXE
Executes dropped EXE 2 IoCs

Processes:

vbc.exevbc.exe

pid process

1072 vbc.exe
1828 vbc.exe
Loads dropped DLL 4 IoCs

Processes:

EQNEDT32.EXE

pid process

1576 EQNEDT32.EXE
1576 EQNEDT32.EXE
1576 EQNEDT32.EXE
1576 EQNEDT32.EXE
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

flow	pid	process
7	1576	EQNEDT32.EXE

pid	process
1072	vbc.exe
1828	vbc.exe

pid	process
1576	EQNEDT32.EXE
1576	EQNEDT32.EXE
1576	EQNEDT32.EXE
1576	EQNEDT32.EXE

Suspicious use of SetThreadContext 4 IoCs

Processes:

vbc.exevbc.exeraserver.exe

description	pid	process	target process
PID 1072 set thread context of 1828	1072	vbc.exe	vbc.exe
PID 1828 set thread context of 1236	1828	vbc.exe	Explorer.EXE
PID 1828 set thread context of 1236	1828	vbc.exe	Explorer.EXE
PID 1728 set thread context of 1236	1728	raserver.exe	Explorer.EXE

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry
T1012

System Information Discovery
T1082

Processes:

EXCEL.EXE

description ioc process

Key opened \REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor EXCEL.EXE
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

1576 EQNEDT32.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor	EXCEL.EXE

pid	process
1576	EQNEDT32.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

Processes:

EXCEL.EXE

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1068 EXCEL.EXE

pid	process
1068	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 19 IoCs

Processes:

vbc.exeraserver.exe

pid	process
1828	vbc.exe
1828	vbc.exe
1828	vbc.exe
1728	raserver.exe
1728	raserver.exe
1728	raserver.exe
1728	raserver.exe
1728	raserver.exe
1728	raserver.exe
1728	raserver.exe
1728	raserver.exe
1728	raserver.exe
1728	raserver.exe
1728	raserver.exe
1728	raserver.exe
1728	raserver.exe
1728	raserver.exe
1728	raserver.exe
1728	raserver.exe

Suspicious behavior: MapViewOfSection 6 IoCs

Processes:

vbc.exeraserver.exe

pid process

1828 vbc.exe
1828 vbc.exe
1828 vbc.exe
1828 vbc.exe
1728 raserver.exe
1728 raserver.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

vbc.exeraserver.exe

description pid process

Token: SeDebugPrivilege 1828 vbc.exe
Token: SeDebugPrivilege 1728 raserver.exe
Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

Explorer.EXE

pid process

1236 Explorer.EXE
1236 Explorer.EXE
1236 Explorer.EXE
1236 Explorer.EXE
Suspicious use of SendNotifyMessage 4 IoCs

Processes:

Explorer.EXE

pid process

1236 Explorer.EXE
1236 Explorer.EXE
1236 Explorer.EXE
1236 Explorer.EXE
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

1068 EXCEL.EXE
1068 EXCEL.EXE
1068 EXCEL.EXE

description	pid	process
Token: SeDebugPrivilege	1828	vbc.exe
Token: SeDebugPrivilege	1728	raserver.exe

pid	process
1236	Explorer.EXE
1236	Explorer.EXE
1236	Explorer.EXE
1236	Explorer.EXE

pid	process
1236	Explorer.EXE
1236	Explorer.EXE
1236	Explorer.EXE
1236	Explorer.EXE

pid	process
1068	EXCEL.EXE
1068	EXCEL.EXE
1068	EXCEL.EXE

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

EQNEDT32.EXEvbc.exevbc.exeraserver.exe

description	pid	process	target process
PID 1576 wrote to memory of 1072	1576	EQNEDT32.EXE	vbc.exe
PID 1576 wrote to memory of 1072	1576	EQNEDT32.EXE	vbc.exe
PID 1576 wrote to memory of 1072	1576	EQNEDT32.EXE	vbc.exe
PID 1576 wrote to memory of 1072	1576	EQNEDT32.EXE	vbc.exe
PID 1072 wrote to memory of 1828	1072	vbc.exe	vbc.exe
PID 1072 wrote to memory of 1828	1072	vbc.exe	vbc.exe
PID 1072 wrote to memory of 1828	1072	vbc.exe	vbc.exe
PID 1072 wrote to memory of 1828	1072	vbc.exe	vbc.exe
PID 1072 wrote to memory of 1828	1072	vbc.exe	vbc.exe
PID 1072 wrote to memory of 1828	1072	vbc.exe	vbc.exe
PID 1072 wrote to memory of 1828	1072	vbc.exe	vbc.exe
PID 1828 wrote to memory of 1728	1828	vbc.exe	raserver.exe
PID 1828 wrote to memory of 1728	1828	vbc.exe	raserver.exe
PID 1828 wrote to memory of 1728	1828	vbc.exe	raserver.exe
PID 1828 wrote to memory of 1728	1828	vbc.exe	raserver.exe
PID 1728 wrote to memory of 1660	1728	raserver.exe	cmd.exe
PID 1728 wrote to memory of 1660	1728	raserver.exe	cmd.exe
PID 1728 wrote to memory of 1660	1728	raserver.exe	cmd.exe
PID 1728 wrote to memory of 1660	1728	raserver.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:1236

C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\inquiry10204168.xlsx
2⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:1068

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:1576

C:\Users\Public\vbc.exe
"C:\Users\Public\vbc.exe"
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1072

C:\Users\Public\vbc.exe
"{path}"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1828

C:\Windows\SysWOW64\raserver.exe
"C:\Windows\SysWOW64\raserver.exe"
4⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1728

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Public\vbc.exe"
5⤵
PID:1660

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Exploitation for Client Execution

Scripting

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

Scripting

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Public\vbc.exe
MD5
6b0128e753b4c8eb55a0726dbdbbf35e

SHA1
12ab2a6cb7c26acad4ba209bafdb6fd2ff33523b

SHA256
0ae22d4877231b64b2e9e1252bbe8636ea43fe5692ca899733e715ccfc82e224

SHA512
152e90baebb510c397a7625ec9295ea806d4c233b00df8a938c9f62ea5966f88873b26558cb03131ba992ce7713704b2f2aeb90394bf46355eb6f16d119932f7

Download Submit
C:\Users\Public\vbc.exe
MD5
6b0128e753b4c8eb55a0726dbdbbf35e

SHA1
12ab2a6cb7c26acad4ba209bafdb6fd2ff33523b

SHA256
0ae22d4877231b64b2e9e1252bbe8636ea43fe5692ca899733e715ccfc82e224

SHA512
152e90baebb510c397a7625ec9295ea806d4c233b00df8a938c9f62ea5966f88873b26558cb03131ba992ce7713704b2f2aeb90394bf46355eb6f16d119932f7

Download Submit
C:\Users\Public\vbc.exe
MD5
6b0128e753b4c8eb55a0726dbdbbf35e

SHA1
12ab2a6cb7c26acad4ba209bafdb6fd2ff33523b

SHA256
0ae22d4877231b64b2e9e1252bbe8636ea43fe5692ca899733e715ccfc82e224

SHA512
152e90baebb510c397a7625ec9295ea806d4c233b00df8a938c9f62ea5966f88873b26558cb03131ba992ce7713704b2f2aeb90394bf46355eb6f16d119932f7

Download Submit
\Users\Public\vbc.exe
MD5
6b0128e753b4c8eb55a0726dbdbbf35e

SHA1
12ab2a6cb7c26acad4ba209bafdb6fd2ff33523b

SHA256
0ae22d4877231b64b2e9e1252bbe8636ea43fe5692ca899733e715ccfc82e224

SHA512
152e90baebb510c397a7625ec9295ea806d4c233b00df8a938c9f62ea5966f88873b26558cb03131ba992ce7713704b2f2aeb90394bf46355eb6f16d119932f7

Download Submit
\Users\Public\vbc.exe
MD5
6b0128e753b4c8eb55a0726dbdbbf35e

SHA1
12ab2a6cb7c26acad4ba209bafdb6fd2ff33523b

SHA256
0ae22d4877231b64b2e9e1252bbe8636ea43fe5692ca899733e715ccfc82e224

SHA512
152e90baebb510c397a7625ec9295ea806d4c233b00df8a938c9f62ea5966f88873b26558cb03131ba992ce7713704b2f2aeb90394bf46355eb6f16d119932f7

Download Submit
\Users\Public\vbc.exe
MD5
6b0128e753b4c8eb55a0726dbdbbf35e

SHA1
12ab2a6cb7c26acad4ba209bafdb6fd2ff33523b

SHA256
0ae22d4877231b64b2e9e1252bbe8636ea43fe5692ca899733e715ccfc82e224

SHA512
152e90baebb510c397a7625ec9295ea806d4c233b00df8a938c9f62ea5966f88873b26558cb03131ba992ce7713704b2f2aeb90394bf46355eb6f16d119932f7

Download Submit
\Users\Public\vbc.exe
MD5
6b0128e753b4c8eb55a0726dbdbbf35e

SHA1
12ab2a6cb7c26acad4ba209bafdb6fd2ff33523b

SHA256
0ae22d4877231b64b2e9e1252bbe8636ea43fe5692ca899733e715ccfc82e224

SHA512
152e90baebb510c397a7625ec9295ea806d4c233b00df8a938c9f62ea5966f88873b26558cb03131ba992ce7713704b2f2aeb90394bf46355eb6f16d119932f7

Download Submit
memory/756-2-0x000007FEF7800000-0x000007FEF7A7A000-memory.dmp

Filesize
2.5MB

Download
memory/1072-13-0x00000000003C0000-0x00000000003CE000-memory.dmp

Filesize
56KB

Download
memory/1072-11-0x0000000000D40000-0x0000000000D41000-memory.dmp

Filesize
4KB

Download
memory/1072-10-0x000000006C6A0000-0x000000006CD8E000-memory.dmp

Filesize
6.9MB

Download
memory/1072-14-0x0000000000980000-0x0000000000A01000-memory.dmp

Filesize
516KB

Download
memory/1072-7-0x0000000000000000-mapping.dmp

Download
memory/1236-18-0x0000000004AA0000-0x0000000004B60000-memory.dmp

Filesize
768KB

Download
memory/1236-23-0x00000000069F0000-0x0000000006AD1000-memory.dmp

Filesize
900KB

Download
memory/1660-21-0x0000000000000000-mapping.dmp

Download
memory/1728-19-0x0000000000000000-mapping.dmp

Download
memory/1728-20-0x0000000000E60000-0x0000000000E7C000-memory.dmp

Filesize
112KB

Download
memory/1728-22-0x0000000000CF0000-0x0000000000E0D000-memory.dmp

Filesize
1.1MB

Download
memory/1828-15-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/1828-16-0x000000000041EB70-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads