formbook | c35e2e17c0663fa4adc5a1b219f44cdf90e9ec8a68fe23bf65b43c0ba208dbcb

General

Target

DHL SHIPMENT DOCUMENTS.xlsx
Size

1.2MB
MD5

91ea1fd23a564a74b71f143b86968143
SHA1

903922a4c4e7104dce009d9a01ddf062604e7f3e
SHA256

c35e2e17c0663fa4adc5a1b219f44cdf90e9ec8a68fe23bf65b43c0ba208dbcb
SHA512

7f04ecc1343444bac762d70165ee4fa7bf877d7d9a7fb3fd966953c89a6e0aaf5ea42c707d10470cc00833d0d0da41ba5f854375ad308ba158aee1741cb33579

Score

10^/10

formbook kzk9 rat spyware stealer suricata trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

kzk9

C2

http://www.yourmajordomo.com/kzk9/

Decoy

tianconghuo.club

1996-page.com

ourtownmax.net

conservativetreehose.com

synth.repair

donnachicacreperia.com

tentfull.com

weapp.download

surfersink.com

gattlebusinessservices.com

sebastian249.com

anhphuc.company

betternatureproducts.net

defroplate.com

seattlesquidsquad.com

polarjob.com

lendingadvantage.com

angelsondope.com

goportjitney.com

tiendagrupojagr.com

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata

Formbook Payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1100-80-0x000000000041EB80-mapping.dmp	formbook
behavioral1/memory/1100-79-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral1/memory/936-89-0x0000000000080000-0x00000000000AE000-memory.dmp	formbook

Blocklisted process makes network request 1 IoCs

Processes:

EQNEDT32.EXE

flow pid process

6 1852 EQNEDT32.EXE
Downloads MZ/PE file
Executes dropped EXE 2 IoCs

Processes:

vbc.exevbc.exe

pid process

800 vbc.exe
1100 vbc.exe
Loads dropped DLL 4 IoCs

Processes:

EQNEDT32.EXE

pid process

1852 EQNEDT32.EXE
1852 EQNEDT32.EXE
1852 EQNEDT32.EXE
1852 EQNEDT32.EXE
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

flow	pid	process
6	1852	EQNEDT32.EXE

pid	process
1852	EQNEDT32.EXE
1852	EQNEDT32.EXE
1852	EQNEDT32.EXE
1852	EQNEDT32.EXE

Suspicious use of SetThreadContext 3 IoCs

Processes:

vbc.exevbc.execolorcpl.exe

description	pid	process	target process
PID 800 set thread context of 1100	800	vbc.exe	vbc.exe
PID 1100 set thread context of 1256	1100	vbc.exe	Explorer.EXE
PID 936 set thread context of 1256	936	colorcpl.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

1852 EQNEDT32.EXE

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

pid	process
1852	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-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.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"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.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"	EXCEL.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"	EXCEL.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"	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1656 EXCEL.EXE

pid	process
1656	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 18 IoCs

Processes:

vbc.exevbc.execolorcpl.exe

pid	process
800	vbc.exe
1100	vbc.exe
1100	vbc.exe
936	colorcpl.exe
936	colorcpl.exe
936	colorcpl.exe
936	colorcpl.exe
936	colorcpl.exe
936	colorcpl.exe
936	colorcpl.exe
936	colorcpl.exe
936	colorcpl.exe
936	colorcpl.exe
936	colorcpl.exe
936	colorcpl.exe
936	colorcpl.exe
936	colorcpl.exe
936	colorcpl.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

1256 Explorer.EXE
Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

vbc.execolorcpl.exe

pid process

1100 vbc.exe
1100 vbc.exe
1100 vbc.exe
936 colorcpl.exe
936 colorcpl.exe

pid	process
1256	Explorer.EXE

pid	process
1100	vbc.exe
1100	vbc.exe
1100	vbc.exe
936	colorcpl.exe
936	colorcpl.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

Processes:

vbc.exevbc.execolorcpl.exeExplorer.EXE

description	pid	process
Token: SeDebugPrivilege	800	vbc.exe
Token: SeDebugPrivilege	1100	vbc.exe
Token: SeDebugPrivilege	936	colorcpl.exe
Token: SeShutdownPrivilege	1256	Explorer.EXE
Token: SeShutdownPrivilege	1256	Explorer.EXE
Token: SeShutdownPrivilege	1256	Explorer.EXE
Token: SeShutdownPrivilege	1256	Explorer.EXE

Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1256 Explorer.EXE
1256 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1256 Explorer.EXE
1256 Explorer.EXE
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

1656 EXCEL.EXE
1656 EXCEL.EXE
1656 EXCEL.EXE

pid	process
1256	Explorer.EXE
1256	Explorer.EXE

pid	process
1256	Explorer.EXE
1256	Explorer.EXE

pid	process
1656	EXCEL.EXE
1656	EXCEL.EXE
1656	EXCEL.EXE

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

EQNEDT32.EXEvbc.exeExplorer.EXEcolorcpl.exe

description	pid	process	target process
PID 1852 wrote to memory of 800	1852	EQNEDT32.EXE	vbc.exe
PID 1852 wrote to memory of 800	1852	EQNEDT32.EXE	vbc.exe
PID 1852 wrote to memory of 800	1852	EQNEDT32.EXE	vbc.exe
PID 1852 wrote to memory of 800	1852	EQNEDT32.EXE	vbc.exe
PID 800 wrote to memory of 1100	800	vbc.exe	vbc.exe
PID 800 wrote to memory of 1100	800	vbc.exe	vbc.exe
PID 800 wrote to memory of 1100	800	vbc.exe	vbc.exe
PID 800 wrote to memory of 1100	800	vbc.exe	vbc.exe
PID 800 wrote to memory of 1100	800	vbc.exe	vbc.exe
PID 800 wrote to memory of 1100	800	vbc.exe	vbc.exe
PID 800 wrote to memory of 1100	800	vbc.exe	vbc.exe
PID 1256 wrote to memory of 936	1256	Explorer.EXE	colorcpl.exe
PID 1256 wrote to memory of 936	1256	Explorer.EXE	colorcpl.exe
PID 1256 wrote to memory of 936	1256	Explorer.EXE	colorcpl.exe
PID 1256 wrote to memory of 936	1256	Explorer.EXE	colorcpl.exe
PID 936 wrote to memory of 1756	936	colorcpl.exe	cmd.exe
PID 936 wrote to memory of 1756	936	colorcpl.exe	cmd.exe
PID 936 wrote to memory of 1756	936	colorcpl.exe	cmd.exe
PID 936 wrote to memory of 1756	936	colorcpl.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
- Suspicious use of WriteProcessMemory
PID:1256

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\DHL SHIPMENT DOCUMENTS.xlsx"
2⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:1656

C:\Windows\SysWOW64\colorcpl.exe
"C:\Windows\SysWOW64\colorcpl.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:936

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Public\vbc.exe"
3⤵
PID:1756

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:1852

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:800

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:1100

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

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Public\vbc.exe
MD5
5ee375628c34cd0aa0833e24bc31087a

SHA1
1d8c406871a1969850fd31883f23b56cb0bf0380

SHA256
dfe96798a6065c99050d1cb964200874b40e3916f90e3caed35df9ace3dc3198

SHA512
8b2d3401ebdb16d0ccfd7daa80344e1c0970720da2b12899af6482828ab7fc353b462b3b252dc7b0177a320b1a75bb537c439b64ea7c683e299e7a2e48873b70

Download Submit
C:\Users\Public\vbc.exe
MD5
5ee375628c34cd0aa0833e24bc31087a

SHA1
1d8c406871a1969850fd31883f23b56cb0bf0380

SHA256
dfe96798a6065c99050d1cb964200874b40e3916f90e3caed35df9ace3dc3198

SHA512
8b2d3401ebdb16d0ccfd7daa80344e1c0970720da2b12899af6482828ab7fc353b462b3b252dc7b0177a320b1a75bb537c439b64ea7c683e299e7a2e48873b70

Download Submit
C:\Users\Public\vbc.exe
MD5
5ee375628c34cd0aa0833e24bc31087a

SHA1
1d8c406871a1969850fd31883f23b56cb0bf0380

SHA256
dfe96798a6065c99050d1cb964200874b40e3916f90e3caed35df9ace3dc3198

SHA512
8b2d3401ebdb16d0ccfd7daa80344e1c0970720da2b12899af6482828ab7fc353b462b3b252dc7b0177a320b1a75bb537c439b64ea7c683e299e7a2e48873b70

Download Submit
\Users\Public\vbc.exe
MD5
5ee375628c34cd0aa0833e24bc31087a

SHA1
1d8c406871a1969850fd31883f23b56cb0bf0380

SHA256
dfe96798a6065c99050d1cb964200874b40e3916f90e3caed35df9ace3dc3198

SHA512
8b2d3401ebdb16d0ccfd7daa80344e1c0970720da2b12899af6482828ab7fc353b462b3b252dc7b0177a320b1a75bb537c439b64ea7c683e299e7a2e48873b70

Download Submit
\Users\Public\vbc.exe
MD5
5ee375628c34cd0aa0833e24bc31087a

SHA1
1d8c406871a1969850fd31883f23b56cb0bf0380

SHA256
dfe96798a6065c99050d1cb964200874b40e3916f90e3caed35df9ace3dc3198

SHA512
8b2d3401ebdb16d0ccfd7daa80344e1c0970720da2b12899af6482828ab7fc353b462b3b252dc7b0177a320b1a75bb537c439b64ea7c683e299e7a2e48873b70

Download Submit
\Users\Public\vbc.exe
MD5
5ee375628c34cd0aa0833e24bc31087a

SHA1
1d8c406871a1969850fd31883f23b56cb0bf0380

SHA256
dfe96798a6065c99050d1cb964200874b40e3916f90e3caed35df9ace3dc3198

SHA512
8b2d3401ebdb16d0ccfd7daa80344e1c0970720da2b12899af6482828ab7fc353b462b3b252dc7b0177a320b1a75bb537c439b64ea7c683e299e7a2e48873b70

Download Submit
\Users\Public\vbc.exe
MD5
5ee375628c34cd0aa0833e24bc31087a

SHA1
1d8c406871a1969850fd31883f23b56cb0bf0380

SHA256
dfe96798a6065c99050d1cb964200874b40e3916f90e3caed35df9ace3dc3198

SHA512
8b2d3401ebdb16d0ccfd7daa80344e1c0970720da2b12899af6482828ab7fc353b462b3b252dc7b0177a320b1a75bb537c439b64ea7c683e299e7a2e48873b70

Download Submit
memory/800-77-0x0000000006020000-0x00000000060BD000-memory.dmp

Filesize
628KB

Download
memory/800-74-0x0000000000910000-0x0000000000921000-memory.dmp

Filesize
68KB

Download
memory/800-78-0x0000000000AF0000-0x0000000000B1F000-memory.dmp

Filesize
188KB

Download
memory/800-68-0x0000000000000000-mapping.dmp

Download
memory/800-71-0x0000000001350000-0x0000000001351000-memory.dmp

Filesize
4KB

Download
memory/800-73-0x00000000012B0000-0x00000000012B1000-memory.dmp

Filesize
4KB

Download
memory/936-88-0x00000000020B0000-0x00000000023B3000-memory.dmp

Filesize
3.0MB

Download
memory/936-91-0x0000000000A20000-0x0000000000AB3000-memory.dmp

Filesize
588KB

Download
memory/936-89-0x0000000000080000-0x00000000000AE000-memory.dmp

Filesize
184KB

Download
memory/936-85-0x0000000000000000-mapping.dmp

Download
memory/936-87-0x0000000000C90000-0x0000000000CA8000-memory.dmp

Filesize
96KB

Download
memory/1100-80-0x000000000041EB80-mapping.dmp

Download
memory/1100-79-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/1100-82-0x0000000000930000-0x0000000000C33000-memory.dmp

Filesize
3.0MB

Download
memory/1100-83-0x0000000000180000-0x0000000000194000-memory.dmp

Filesize
80KB

Download
memory/1256-93-0x0000000002AD0000-0x0000000002B76000-memory.dmp

Filesize
664KB

Download
memory/1256-84-0x0000000004000000-0x000000000410D000-memory.dmp

Filesize
1.1MB

Download
memory/1656-76-0x0000000005FC0000-0x0000000006C0A000-memory.dmp

Filesize
12.3MB

Download
memory/1656-61-0x0000000071081000-0x0000000071083000-memory.dmp

Filesize
8KB

Download
memory/1656-60-0x000000002FD71000-0x000000002FD74000-memory.dmp

Filesize
12KB

Download
memory/1656-75-0x0000000005FC0000-0x0000000006C0A000-memory.dmp

Filesize
12.3MB

Download
memory/1656-62-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1656-92-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1756-90-0x0000000000000000-mapping.dmp

Download
memory/1852-63-0x0000000075561000-0x0000000075563000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads