formbook | a3758c397e0cd8a41ae947ad432af74b3509c10882104e605cf95ef95c85e0be

General

Target

Arrival notice.xlsx
Size

1.9MB
MD5

f0a75c4a537ebc9c4e863bacad75c09c
SHA1

87d689d047a88d3bdece0af9b5c5f07477f79e85
SHA256

a3758c397e0cd8a41ae947ad432af74b3509c10882104e605cf95ef95c85e0be
SHA512

255e051876cc920882748ecbef946ada53fe7d4f614eff4acb5a7cf92fe6cc05b1014de05d49c0f812519fa2093373cbbd65c98b26bd40cfa92bb9dea5a56efc

Score

10^/10

formbook xloader loader rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

C2

http://www.classifoods.com/oean/

Decoy

keboate.club

whitehatiq.com

loimtech.com

icaroagencia.com

snigglez.com

noreservationsxpress.com

villacascabel.com

5037adairway.com

growingequity.fund

stafffully.com

bingent.info

tmssaleguarantee.com

neonatalfeedrates.com

george-beauty.com

oraghallaighjourney.net

zunutrition.com

sylkysmooveentertainment.com

ddmns6tzey2d.com

dvcstay.com

304shaughnessygreen.info

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
Xloader
Xloader is a rebranded version of Formbook malware.
loader xloader

Xloader Payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1100-15-0x0000000000400000-0x0000000000428000-memory.dmp	xloader
behavioral1/memory/1100-16-0x000000000041CFE0-mapping.dmp	xloader
behavioral1/memory/1224-18-0x0000000000000000-mapping.dmp	xloader

Blocklisted process makes network request 1 IoCs

Processes:

EQNEDT32.EXE

flow pid process

7 1616 EQNEDT32.EXE
Executes dropped EXE 2 IoCs

Processes:

vbc.exevbc.exe

pid process

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

Processes:

EQNEDT32.EXE

pid process

1616 EQNEDT32.EXE
1616 EQNEDT32.EXE
1616 EQNEDT32.EXE
1616 EQNEDT32.EXE
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

flow	pid	process
7	1616	EQNEDT32.EXE

pid	process
856	vbc.exe
1100	vbc.exe

pid	process
1616	EQNEDT32.EXE
1616	EQNEDT32.EXE
1616	EQNEDT32.EXE
1616	EQNEDT32.EXE

Suspicious use of SetThreadContext 3 IoCs

Processes:

vbc.exevbc.exemstsc.exe

description	pid	process	target process
PID 856 set thread context of 1100	856	vbc.exe	vbc.exe
PID 1100 set thread context of 1248	1100	vbc.exe	Explorer.EXE
PID 1224 set thread context of 1248	1224	mstsc.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

1616 EQNEDT32.EXE

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

pid	process
1616	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-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\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-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\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-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

2012 EXCEL.EXE

pid	process
2012	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 22 IoCs

Processes:

vbc.exemstsc.exe

pid	process
1100	vbc.exe
1100	vbc.exe
1224	mstsc.exe
1224	mstsc.exe
1224	mstsc.exe
1224	mstsc.exe
1224	mstsc.exe
1224	mstsc.exe
1224	mstsc.exe
1224	mstsc.exe
1224	mstsc.exe
1224	mstsc.exe
1224	mstsc.exe
1224	mstsc.exe
1224	mstsc.exe
1224	mstsc.exe
1224	mstsc.exe
1224	mstsc.exe
1224	mstsc.exe
1224	mstsc.exe
1224	mstsc.exe
1224	mstsc.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

1248 Explorer.EXE
Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

vbc.exemstsc.exe

pid process

1100 vbc.exe
1100 vbc.exe
1100 vbc.exe
1224 mstsc.exe
1224 mstsc.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

Processes:

vbc.exemstsc.exeExplorer.EXE

description	pid	process
Token: SeDebugPrivilege	1100	vbc.exe
Token: SeDebugPrivilege	1224	mstsc.exe
Token: SeShutdownPrivilege	1248	Explorer.EXE
Token: SeShutdownPrivilege	1248	Explorer.EXE
Token: SeShutdownPrivilege	1248	Explorer.EXE
Token: SeShutdownPrivilege	1248	Explorer.EXE
Token: SeShutdownPrivilege	1248	Explorer.EXE

Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

Explorer.EXE

pid process

1248 Explorer.EXE
1248 Explorer.EXE
1248 Explorer.EXE
1248 Explorer.EXE

Suspicious use of SendNotifyMessage 24 IoCs

Processes:

Explorer.EXE

pid	process
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE

Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

2012 EXCEL.EXE
2012 EXCEL.EXE
2012 EXCEL.EXE

pid	process
2012	EXCEL.EXE
2012	EXCEL.EXE
2012	EXCEL.EXE

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

EQNEDT32.EXEvbc.exeExplorer.EXEmstsc.exe

description	pid	process	target process
PID 1616 wrote to memory of 856	1616	EQNEDT32.EXE	vbc.exe
PID 1616 wrote to memory of 856	1616	EQNEDT32.EXE	vbc.exe
PID 1616 wrote to memory of 856	1616	EQNEDT32.EXE	vbc.exe
PID 1616 wrote to memory of 856	1616	EQNEDT32.EXE	vbc.exe
PID 856 wrote to memory of 1100	856	vbc.exe	vbc.exe
PID 856 wrote to memory of 1100	856	vbc.exe	vbc.exe
PID 856 wrote to memory of 1100	856	vbc.exe	vbc.exe
PID 856 wrote to memory of 1100	856	vbc.exe	vbc.exe
PID 856 wrote to memory of 1100	856	vbc.exe	vbc.exe
PID 856 wrote to memory of 1100	856	vbc.exe	vbc.exe
PID 856 wrote to memory of 1100	856	vbc.exe	vbc.exe
PID 1248 wrote to memory of 1224	1248	Explorer.EXE	mstsc.exe
PID 1248 wrote to memory of 1224	1248	Explorer.EXE	mstsc.exe
PID 1248 wrote to memory of 1224	1248	Explorer.EXE	mstsc.exe
PID 1248 wrote to memory of 1224	1248	Explorer.EXE	mstsc.exe
PID 1224 wrote to memory of 556	1224	mstsc.exe	cmd.exe
PID 1224 wrote to memory of 556	1224	mstsc.exe	cmd.exe
PID 1224 wrote to memory of 556	1224	mstsc.exe	cmd.exe
PID 1224 wrote to memory of 556	1224	mstsc.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:1248

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\Arrival notice.xlsx"
2⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:2012

C:\Windows\SysWOW64\mstsc.exe
"C:\Windows\SysWOW64\mstsc.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1224

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Public\vbc.exe"
3⤵
PID:556

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:1616

C:\Users\Public\vbc.exe
"C:\Users\Public\vbc.exe"
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:856

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: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
4f322138c86416ce5503ff3c49cb4f01

SHA1
87ccb2e2cf10e5beab77711ef2ddc025430e3151

SHA256
a21da47756a5b8a820ac633dcc6902b2ca4b9dd0861741f8f68153e5c436bda5

SHA512
a8292e75388ac981899e8256901bfca625d35d5ff96539e19fa10db6729fb536f26f6cbac8f82c3ef5b1a257273826c6d00e10827acda41c8d38bf3c0245fbe8

Download Submit
C:\Users\Public\vbc.exe
MD5
4f322138c86416ce5503ff3c49cb4f01

SHA1
87ccb2e2cf10e5beab77711ef2ddc025430e3151

SHA256
a21da47756a5b8a820ac633dcc6902b2ca4b9dd0861741f8f68153e5c436bda5

SHA512
a8292e75388ac981899e8256901bfca625d35d5ff96539e19fa10db6729fb536f26f6cbac8f82c3ef5b1a257273826c6d00e10827acda41c8d38bf3c0245fbe8

Download Submit
C:\Users\Public\vbc.exe
MD5
4f322138c86416ce5503ff3c49cb4f01

SHA1
87ccb2e2cf10e5beab77711ef2ddc025430e3151

SHA256
a21da47756a5b8a820ac633dcc6902b2ca4b9dd0861741f8f68153e5c436bda5

SHA512
a8292e75388ac981899e8256901bfca625d35d5ff96539e19fa10db6729fb536f26f6cbac8f82c3ef5b1a257273826c6d00e10827acda41c8d38bf3c0245fbe8

Download Submit
\Users\Public\vbc.exe
MD5
4f322138c86416ce5503ff3c49cb4f01

SHA1
87ccb2e2cf10e5beab77711ef2ddc025430e3151

SHA256
a21da47756a5b8a820ac633dcc6902b2ca4b9dd0861741f8f68153e5c436bda5

SHA512
a8292e75388ac981899e8256901bfca625d35d5ff96539e19fa10db6729fb536f26f6cbac8f82c3ef5b1a257273826c6d00e10827acda41c8d38bf3c0245fbe8

Download Submit
\Users\Public\vbc.exe
MD5
4f322138c86416ce5503ff3c49cb4f01

SHA1
87ccb2e2cf10e5beab77711ef2ddc025430e3151

SHA256
a21da47756a5b8a820ac633dcc6902b2ca4b9dd0861741f8f68153e5c436bda5

SHA512
a8292e75388ac981899e8256901bfca625d35d5ff96539e19fa10db6729fb536f26f6cbac8f82c3ef5b1a257273826c6d00e10827acda41c8d38bf3c0245fbe8

Download Submit
\Users\Public\vbc.exe
MD5
4f322138c86416ce5503ff3c49cb4f01

SHA1
87ccb2e2cf10e5beab77711ef2ddc025430e3151

SHA256
a21da47756a5b8a820ac633dcc6902b2ca4b9dd0861741f8f68153e5c436bda5

SHA512
a8292e75388ac981899e8256901bfca625d35d5ff96539e19fa10db6729fb536f26f6cbac8f82c3ef5b1a257273826c6d00e10827acda41c8d38bf3c0245fbe8

Download Submit
\Users\Public\vbc.exe
MD5
4f322138c86416ce5503ff3c49cb4f01

SHA1
87ccb2e2cf10e5beab77711ef2ddc025430e3151

SHA256
a21da47756a5b8a820ac633dcc6902b2ca4b9dd0861741f8f68153e5c436bda5

SHA512
a8292e75388ac981899e8256901bfca625d35d5ff96539e19fa10db6729fb536f26f6cbac8f82c3ef5b1a257273826c6d00e10827acda41c8d38bf3c0245fbe8

Download Submit
memory/556-20-0x0000000000000000-mapping.dmp

Download
memory/856-10-0x000000006CB30000-0x000000006D21E000-memory.dmp

Filesize
6.9MB

Download
memory/856-11-0x0000000001170000-0x0000000001171000-memory.dmp

Filesize
4KB

Download
memory/856-13-0x00000000004F0000-0x00000000004FE000-memory.dmp

Filesize
56KB

Download
memory/856-14-0x0000000004E00000-0x0000000004E80000-memory.dmp

Filesize
512KB

Download
memory/856-7-0x0000000000000000-mapping.dmp

Download
memory/1096-2-0x000007FEF7B20000-0x000007FEF7D9A000-memory.dmp

Filesize
2.5MB

Download
memory/1100-15-0x0000000000400000-0x0000000000428000-memory.dmp

Filesize
160KB

Download
memory/1100-16-0x000000000041CFE0-mapping.dmp

Download
memory/1224-18-0x0000000000000000-mapping.dmp

Download
memory/1224-19-0x0000000000B90000-0x0000000000C94000-memory.dmp

Filesize
1.0MB

Download
memory/1224-21-0x0000000004310000-0x0000000004423000-memory.dmp

Filesize
1.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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