formbook | 970c5c7c04d9f838897c5914b840f40c0bf1dbf61503ba093a68552336952345

General

Target

SwiftMT1O3.xlsx
Size

2.4MB
MD5

01a88cf9ab93b715387c2f3ba777cf6e
SHA1

19fad6f30f2b31fec8708a9897c630f8065f61a5
SHA256

970c5c7c04d9f838897c5914b840f40c0bf1dbf61503ba093a68552336952345
SHA512

2dca7bbb27e320a43d04adc3d118bbb6a2c3ce0494c10a5d39805350d0cea5852b57e354aedc10b8f5d2eec54ece38caeb458d6e536166bb3958764513aba4ba

Score

10^/10

formbook ransomware rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

C2

http://www.huynhanhdung.com/kna/

Decoy

lawrencefiredepartment.com

executivehomeoffices.com

solfed.world

oshawaexchange.com

webdavlexstore.com

youpieb.com

chiller-master.com

bearstoragetn.com

daf90x16.com

gewhacaalouine.com

simplyezi.com

cstechnologyservices.com

nosyboats.com

thecocomarie.com

vetinaryeco.club

americangoselfilm.com

gdsuhejia.com

verbunden-sein.net

the-minerva.com

loctrantv.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/1652-20-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral1/memory/1652-21-0x000000000041EAB0-mapping.dmp	formbook
behavioral1/memory/1544-30-0x00000000000D0000-0x00000000000FE000-memory.dmp	formbook

Blocklisted process makes network request 1 IoCs

Processes:

EQNEDT32.EXE

flow pid process

7 1352 EQNEDT32.EXE
Executes dropped EXE 2 IoCs

Processes:

vbc.exevbc.exe

pid process

1824 vbc.exe
1652 vbc.exe
Loads dropped DLL 4 IoCs

Processes:

EQNEDT32.EXE

pid process

1352 EQNEDT32.EXE
1352 EQNEDT32.EXE
1352 EQNEDT32.EXE
1352 EQNEDT32.EXE
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
ransomware

System Information Discovery
T1082

flow	pid	process
7	1352	EQNEDT32.EXE

pid	process
1824	vbc.exe
1652	vbc.exe

pid	process
1352	EQNEDT32.EXE
1352	EQNEDT32.EXE
1352	EQNEDT32.EXE
1352	EQNEDT32.EXE

Suspicious use of SetThreadContext 3 IoCs

Processes:

vbc.exevbc.exewininit.exe

description	pid	process	target process
PID 1824 set thread context of 1652	1824	vbc.exe	vbc.exe
PID 1652 set thread context of 1200	1652	vbc.exe	Explorer.EXE
PID 1544 set thread context of 1200	1544	wininit.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

1352 EQNEDT32.EXE

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

pid	process
1352	EQNEDT32.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

Processes:

EXCEL.EXE

description	ioc	process
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	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
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\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 (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
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\MenuExt\Se&nd to OneNote	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1812 EXCEL.EXE

pid	process
1812	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 20 IoCs

Processes:

vbc.exewininit.exe

pid	process
1652	vbc.exe
1652	vbc.exe
1544	wininit.exe
1544	wininit.exe
1544	wininit.exe
1544	wininit.exe
1544	wininit.exe
1544	wininit.exe
1544	wininit.exe
1544	wininit.exe
1544	wininit.exe
1544	wininit.exe
1544	wininit.exe
1544	wininit.exe
1544	wininit.exe
1544	wininit.exe
1544	wininit.exe
1544	wininit.exe
1544	wininit.exe
1544	wininit.exe

Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

vbc.exewininit.exe

pid process

1652 vbc.exe
1652 vbc.exe
1652 vbc.exe
1544 wininit.exe
1544 wininit.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

vbc.exewininit.exe

description pid process

Token: SeDebugPrivilege 1652 vbc.exe
Token: SeDebugPrivilege 1544 wininit.exe
Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

Explorer.EXE

pid process

1200 Explorer.EXE
1200 Explorer.EXE
1200 Explorer.EXE
1200 Explorer.EXE
Suspicious use of SendNotifyMessage 4 IoCs

Processes:

Explorer.EXE

pid process

1200 Explorer.EXE
1200 Explorer.EXE
1200 Explorer.EXE
1200 Explorer.EXE
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

1812 EXCEL.EXE
1812 EXCEL.EXE
1812 EXCEL.EXE

description	pid	process
Token: SeDebugPrivilege	1652	vbc.exe
Token: SeDebugPrivilege	1544	wininit.exe

pid	process
1200	Explorer.EXE
1200	Explorer.EXE
1200	Explorer.EXE
1200	Explorer.EXE

pid	process
1200	Explorer.EXE
1200	Explorer.EXE
1200	Explorer.EXE
1200	Explorer.EXE

pid	process
1812	EXCEL.EXE
1812	EXCEL.EXE
1812	EXCEL.EXE

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

EQNEDT32.EXEvbc.exeExplorer.EXEwininit.exe

description	pid	process	target process
PID 1352 wrote to memory of 1824	1352	EQNEDT32.EXE	vbc.exe
PID 1352 wrote to memory of 1824	1352	EQNEDT32.EXE	vbc.exe
PID 1352 wrote to memory of 1824	1352	EQNEDT32.EXE	vbc.exe
PID 1352 wrote to memory of 1824	1352	EQNEDT32.EXE	vbc.exe
PID 1824 wrote to memory of 1652	1824	vbc.exe	vbc.exe
PID 1824 wrote to memory of 1652	1824	vbc.exe	vbc.exe
PID 1824 wrote to memory of 1652	1824	vbc.exe	vbc.exe
PID 1824 wrote to memory of 1652	1824	vbc.exe	vbc.exe
PID 1824 wrote to memory of 1652	1824	vbc.exe	vbc.exe
PID 1824 wrote to memory of 1652	1824	vbc.exe	vbc.exe
PID 1824 wrote to memory of 1652	1824	vbc.exe	vbc.exe
PID 1200 wrote to memory of 1544	1200	Explorer.EXE	wininit.exe
PID 1200 wrote to memory of 1544	1200	Explorer.EXE	wininit.exe
PID 1200 wrote to memory of 1544	1200	Explorer.EXE	wininit.exe
PID 1200 wrote to memory of 1544	1200	Explorer.EXE	wininit.exe
PID 1544 wrote to memory of 1128	1544	wininit.exe	cmd.exe
PID 1544 wrote to memory of 1128	1544	wininit.exe	cmd.exe
PID 1544 wrote to memory of 1128	1544	wininit.exe	cmd.exe
PID 1544 wrote to memory of 1128	1544	wininit.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1200

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\SwiftMT1O3.xlsx
2⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:1812

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:1544

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Public\vbc.exe"
3⤵
PID:1128

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:1352

C:\Users\Public\vbc.exe
"C:\Users\Public\vbc.exe"
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1824

C:\Users\Public\vbc.exe
"{path}"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1652

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

System Information Discovery

2

T1082

Query Registry

1

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Public\vbc.exe
MD5
03bfef72c4d962a223cd051d1fe5bbe6

SHA1
bb7097101b26eadb4af50f6e2bb21c2cad610217

SHA256
f59df25daa1bbe11f38724ad0b36eebc535f1f36ae3796ce5bebe1049cbb57ed

SHA512
23b1a4542eb8f530e6984f51e340699c0bda6e03e2c192ef46f61a04358c261ca1f902f5e1c2e36a081fa286f92c4061768e130f38fdca95f3865d9c8cf06874

Download Submit
C:\Users\Public\vbc.exe
MD5
03bfef72c4d962a223cd051d1fe5bbe6

SHA1
bb7097101b26eadb4af50f6e2bb21c2cad610217

SHA256
f59df25daa1bbe11f38724ad0b36eebc535f1f36ae3796ce5bebe1049cbb57ed

SHA512
23b1a4542eb8f530e6984f51e340699c0bda6e03e2c192ef46f61a04358c261ca1f902f5e1c2e36a081fa286f92c4061768e130f38fdca95f3865d9c8cf06874

Download Submit
C:\Users\Public\vbc.exe
MD5
03bfef72c4d962a223cd051d1fe5bbe6

SHA1
bb7097101b26eadb4af50f6e2bb21c2cad610217

SHA256
f59df25daa1bbe11f38724ad0b36eebc535f1f36ae3796ce5bebe1049cbb57ed

SHA512
23b1a4542eb8f530e6984f51e340699c0bda6e03e2c192ef46f61a04358c261ca1f902f5e1c2e36a081fa286f92c4061768e130f38fdca95f3865d9c8cf06874

Download Submit
\Users\Public\vbc.exe
MD5
03bfef72c4d962a223cd051d1fe5bbe6

SHA1
bb7097101b26eadb4af50f6e2bb21c2cad610217

SHA256
f59df25daa1bbe11f38724ad0b36eebc535f1f36ae3796ce5bebe1049cbb57ed

SHA512
23b1a4542eb8f530e6984f51e340699c0bda6e03e2c192ef46f61a04358c261ca1f902f5e1c2e36a081fa286f92c4061768e130f38fdca95f3865d9c8cf06874

Download Submit
\Users\Public\vbc.exe
MD5
03bfef72c4d962a223cd051d1fe5bbe6

SHA1
bb7097101b26eadb4af50f6e2bb21c2cad610217

SHA256
f59df25daa1bbe11f38724ad0b36eebc535f1f36ae3796ce5bebe1049cbb57ed

SHA512
23b1a4542eb8f530e6984f51e340699c0bda6e03e2c192ef46f61a04358c261ca1f902f5e1c2e36a081fa286f92c4061768e130f38fdca95f3865d9c8cf06874

Download Submit
\Users\Public\vbc.exe
MD5
03bfef72c4d962a223cd051d1fe5bbe6

SHA1
bb7097101b26eadb4af50f6e2bb21c2cad610217

SHA256
f59df25daa1bbe11f38724ad0b36eebc535f1f36ae3796ce5bebe1049cbb57ed

SHA512
23b1a4542eb8f530e6984f51e340699c0bda6e03e2c192ef46f61a04358c261ca1f902f5e1c2e36a081fa286f92c4061768e130f38fdca95f3865d9c8cf06874

Download Submit
\Users\Public\vbc.exe
MD5
03bfef72c4d962a223cd051d1fe5bbe6

SHA1
bb7097101b26eadb4af50f6e2bb21c2cad610217

SHA256
f59df25daa1bbe11f38724ad0b36eebc535f1f36ae3796ce5bebe1049cbb57ed

SHA512
23b1a4542eb8f530e6984f51e340699c0bda6e03e2c192ef46f61a04358c261ca1f902f5e1c2e36a081fa286f92c4061768e130f38fdca95f3865d9c8cf06874

Download Submit
memory/1128-28-0x0000000000000000-mapping.dmp

Download
memory/1200-26-0x0000000004210000-0x00000000042EE000-memory.dmp

Filesize
888KB

Download
memory/1200-33-0x0000000004B10000-0x0000000004BF3000-memory.dmp

Filesize
908KB

Download
memory/1352-5-0x0000000076241000-0x0000000076243000-memory.dmp

Filesize
8KB

Download
memory/1544-32-0x0000000000A80000-0x0000000000B13000-memory.dmp

Filesize
588KB

Download
memory/1544-31-0x0000000002240000-0x0000000002543000-memory.dmp

Filesize
3.0MB

Download
memory/1544-30-0x00000000000D0000-0x00000000000FE000-memory.dmp

Filesize
184KB

Download
memory/1544-29-0x0000000000E20000-0x0000000000E3A000-memory.dmp

Filesize
104KB

Download
memory/1544-27-0x0000000000000000-mapping.dmp

Download
memory/1652-24-0x0000000000970000-0x0000000000C73000-memory.dmp

Filesize
3.0MB

Download
memory/1652-20-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/1652-21-0x000000000041EAB0-mapping.dmp

Download
memory/1652-25-0x0000000000280000-0x0000000000294000-memory.dmp

Filesize
80KB

Download
memory/1740-6-0x000007FEF79D0000-0x000007FEF7C4A000-memory.dmp

Filesize
2.5MB

Download
memory/1812-3-0x0000000071241000-0x0000000071243000-memory.dmp

Filesize
8KB

Download
memory/1812-2-0x000000002F181000-0x000000002F184000-memory.dmp

Filesize
12KB

Download
memory/1812-4-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1824-11-0x0000000000000000-mapping.dmp

Download
memory/1824-19-0x00000000056D0000-0x000000000576A000-memory.dmp

Filesize
616KB

Download
memory/1824-18-0x0000000000530000-0x000000000053E000-memory.dmp

Filesize
56KB

Download
memory/1824-17-0x0000000004650000-0x0000000004651000-memory.dmp

Filesize
4KB

Download
memory/1824-15-0x0000000000040000-0x0000000000041000-memory.dmp

Filesize
4KB

Download
memory/1824-14-0x000000006C3A0000-0x000000006CA8E000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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