formbook | 25cf0d59c10c48159f55b2ed560b6f3974f5b007b9b4bb31b9cfd5e33ca0bd09

General

Target

PO-829ARTS-PI 2021-7-17.xlsx
Size

1.1MB
MD5

ba24c9c748b75fb64abc01cc6c18ed81
SHA1

a08173593973d23242ad28722cf60924f77fdcff
SHA256

25cf0d59c10c48159f55b2ed560b6f3974f5b007b9b4bb31b9cfd5e33ca0bd09
SHA512

2536da0aacd37188278d31205b912096d37e9c62cb9247cae0e15d7999ec02ab9697db71b72c3e188e07240064bae77d584606cf9f3c3746bdadabd59177528d

Score

10^/10

formbook rat spyware stealer suricata trojan

Malware Config

Extracted

Family

formbook

Version

4.1

C2

http://www.fortmyerscruisevacation.com/dd2v/

Decoy

jkrqzmeyd.icu

cbluedottvwdshop.com

yhchen.space

premierhealthnwellness.com

szkuyaju.com

harvestmoonloans.net

dadematerial.com

mariaclarahairstudio.com

hwunvy.online

puloutjbmere.com

kossu1989.com

dubbedos.com

ncylis.com

hybrid-sol.com

travelature.com

gracefulcounts.com

66secretgarden.com

eslonyourcell.com

wisersponsorship.com

sepn3.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
suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile
suricata

Formbook Payload 2 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1500-73-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral1/memory/724-86-0x0000000000090000-0x00000000000BE000-memory.dmp	formbook

Blocklisted process makes network request 1 IoCs

Processes:

EQNEDT32.EXE

flow pid process

6 1960 EQNEDT32.EXE
Downloads MZ/PE file
Executes dropped EXE 1 IoCs

Processes:

vbc.exe

pid process

1084 vbc.exe
Loads dropped DLL 4 IoCs

Processes:

EQNEDT32.EXE

pid process

1960 EQNEDT32.EXE
1960 EQNEDT32.EXE
1960 EQNEDT32.EXE
1960 EQNEDT32.EXE
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

flow	pid	process
6	1960	EQNEDT32.EXE

pid	process
1084	vbc.exe

pid	process
1960	EQNEDT32.EXE
1960	EQNEDT32.EXE
1960	EQNEDT32.EXE
1960	EQNEDT32.EXE

Suspicious use of SetThreadContext 4 IoCs

Processes:

vbc.exesvchost.exewuapp.exe

description	pid	process	target process
PID 1084 set thread context of 1500	1084	vbc.exe	svchost.exe
PID 1500 set thread context of 1208	1500	svchost.exe	Explorer.EXE
PID 1500 set thread context of 1208	1500	svchost.exe	Explorer.EXE
PID 724 set thread context of 1208	724	wuapp.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

1960 EQNEDT32.EXE

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

pid	process
1960	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-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\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

1648 EXCEL.EXE

pid	process
1648	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 29 IoCs

Processes:

svchost.exewuapp.exe

pid	process
1500	svchost.exe
1500	svchost.exe
1500	svchost.exe
724	wuapp.exe
724	wuapp.exe
724	wuapp.exe
724	wuapp.exe
724	wuapp.exe
724	wuapp.exe
724	wuapp.exe
724	wuapp.exe
724	wuapp.exe
724	wuapp.exe
724	wuapp.exe
724	wuapp.exe
724	wuapp.exe
724	wuapp.exe
724	wuapp.exe
724	wuapp.exe
724	wuapp.exe
724	wuapp.exe
724	wuapp.exe
724	wuapp.exe
724	wuapp.exe
724	wuapp.exe
724	wuapp.exe
724	wuapp.exe
724	wuapp.exe
724	wuapp.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

1208 Explorer.EXE
Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

vbc.exesvchost.exewuapp.exe

pid process

1084 vbc.exe
1500 svchost.exe
1500 svchost.exe
1500 svchost.exe
1500 svchost.exe
724 wuapp.exe
724 wuapp.exe

pid	process
1208	Explorer.EXE

pid	process
1084	vbc.exe
1500	svchost.exe
1500	svchost.exe
1500	svchost.exe
1500	svchost.exe
724	wuapp.exe
724	wuapp.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

Processes:

svchost.exeExplorer.EXEwuapp.exe

description	pid	process
Token: SeDebugPrivilege	1500	svchost.exe
Token: SeShutdownPrivilege	1208	Explorer.EXE
Token: SeShutdownPrivilege	1208	Explorer.EXE
Token: SeShutdownPrivilege	1208	Explorer.EXE
Token: SeShutdownPrivilege	1208	Explorer.EXE
Token: SeDebugPrivilege	724	wuapp.exe
Token: SeShutdownPrivilege	1208	Explorer.EXE
Token: SeShutdownPrivilege	1208	Explorer.EXE
Token: SeShutdownPrivilege	1208	Explorer.EXE

Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

Explorer.EXE

pid process

1208 Explorer.EXE
1208 Explorer.EXE
1208 Explorer.EXE
1208 Explorer.EXE
Suspicious use of SendNotifyMessage 4 IoCs

Processes:

Explorer.EXE

pid process

1208 Explorer.EXE
1208 Explorer.EXE
1208 Explorer.EXE
1208 Explorer.EXE
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

1648 EXCEL.EXE
1648 EXCEL.EXE
1648 EXCEL.EXE

pid	process
1208	Explorer.EXE
1208	Explorer.EXE
1208	Explorer.EXE
1208	Explorer.EXE

pid	process
1208	Explorer.EXE
1208	Explorer.EXE
1208	Explorer.EXE
1208	Explorer.EXE

pid	process
1648	EXCEL.EXE
1648	EXCEL.EXE
1648	EXCEL.EXE

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

EQNEDT32.EXEvbc.exeExplorer.EXEwuapp.exe

description	pid	process	target process
PID 1960 wrote to memory of 1084	1960	EQNEDT32.EXE	vbc.exe
PID 1960 wrote to memory of 1084	1960	EQNEDT32.EXE	vbc.exe
PID 1960 wrote to memory of 1084	1960	EQNEDT32.EXE	vbc.exe
PID 1960 wrote to memory of 1084	1960	EQNEDT32.EXE	vbc.exe
PID 1084 wrote to memory of 1500	1084	vbc.exe	svchost.exe
PID 1084 wrote to memory of 1500	1084	vbc.exe	svchost.exe
PID 1084 wrote to memory of 1500	1084	vbc.exe	svchost.exe
PID 1084 wrote to memory of 1500	1084	vbc.exe	svchost.exe
PID 1084 wrote to memory of 1500	1084	vbc.exe	svchost.exe
PID 1208 wrote to memory of 724	1208	Explorer.EXE	wuapp.exe
PID 1208 wrote to memory of 724	1208	Explorer.EXE	wuapp.exe
PID 1208 wrote to memory of 724	1208	Explorer.EXE	wuapp.exe
PID 1208 wrote to memory of 724	1208	Explorer.EXE	wuapp.exe
PID 1208 wrote to memory of 724	1208	Explorer.EXE	wuapp.exe
PID 1208 wrote to memory of 724	1208	Explorer.EXE	wuapp.exe
PID 1208 wrote to memory of 724	1208	Explorer.EXE	wuapp.exe
PID 724 wrote to memory of 940	724	wuapp.exe	cmd.exe
PID 724 wrote to memory of 940	724	wuapp.exe	cmd.exe
PID 724 wrote to memory of 940	724	wuapp.exe	cmd.exe
PID 724 wrote to memory of 940	724	wuapp.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:1208

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\PO-829ARTS-PI 2021-7-17.xlsx"
2⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:1648

C:\Windows\SysWOW64\wuapp.exe
"C:\Windows\SysWOW64\wuapp.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:724

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Windows\SysWOW64\svchost.exe"
3⤵
PID:940

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:1960

C:\Users\Public\vbc.exe
"C:\Users\Public\vbc.exe"
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1084

C:\Windows\SysWOW64\svchost.exe
"C:\Users\Public\vbc.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1500

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
a584c1efdc2d5911278ab43d1fc671af

SHA1
58bbfeda525cd20cde716d8d587b96a58a494d6f

SHA256
8c988a622b822f0fc226b928ab317dc7a6130b395f74a3e39c3443b275c93771

SHA512
2bbc2892dca895ed1e2ede7a198c08baeb943e701defad1415efc4d78e3e9eeabaa9056cb5c64bad904b926ff51d8d4b234bef55657cd1478ddf2f1e0625bbcc

Download Submit
C:\Users\Public\vbc.exe
MD5
a584c1efdc2d5911278ab43d1fc671af

SHA1
58bbfeda525cd20cde716d8d587b96a58a494d6f

SHA256
8c988a622b822f0fc226b928ab317dc7a6130b395f74a3e39c3443b275c93771

SHA512
2bbc2892dca895ed1e2ede7a198c08baeb943e701defad1415efc4d78e3e9eeabaa9056cb5c64bad904b926ff51d8d4b234bef55657cd1478ddf2f1e0625bbcc

Download Submit
\Users\Public\vbc.exe
MD5
a584c1efdc2d5911278ab43d1fc671af

SHA1
58bbfeda525cd20cde716d8d587b96a58a494d6f

SHA256
8c988a622b822f0fc226b928ab317dc7a6130b395f74a3e39c3443b275c93771

SHA512
2bbc2892dca895ed1e2ede7a198c08baeb943e701defad1415efc4d78e3e9eeabaa9056cb5c64bad904b926ff51d8d4b234bef55657cd1478ddf2f1e0625bbcc

Download Submit
\Users\Public\vbc.exe
MD5
a584c1efdc2d5911278ab43d1fc671af

SHA1
58bbfeda525cd20cde716d8d587b96a58a494d6f

SHA256
8c988a622b822f0fc226b928ab317dc7a6130b395f74a3e39c3443b275c93771

SHA512
2bbc2892dca895ed1e2ede7a198c08baeb943e701defad1415efc4d78e3e9eeabaa9056cb5c64bad904b926ff51d8d4b234bef55657cd1478ddf2f1e0625bbcc

Download Submit
\Users\Public\vbc.exe
MD5
a584c1efdc2d5911278ab43d1fc671af

SHA1
58bbfeda525cd20cde716d8d587b96a58a494d6f

SHA256
8c988a622b822f0fc226b928ab317dc7a6130b395f74a3e39c3443b275c93771

SHA512
2bbc2892dca895ed1e2ede7a198c08baeb943e701defad1415efc4d78e3e9eeabaa9056cb5c64bad904b926ff51d8d4b234bef55657cd1478ddf2f1e0625bbcc

Download Submit
\Users\Public\vbc.exe
MD5
a584c1efdc2d5911278ab43d1fc671af

SHA1
58bbfeda525cd20cde716d8d587b96a58a494d6f

SHA256
8c988a622b822f0fc226b928ab317dc7a6130b395f74a3e39c3443b275c93771

SHA512
2bbc2892dca895ed1e2ede7a198c08baeb943e701defad1415efc4d78e3e9eeabaa9056cb5c64bad904b926ff51d8d4b234bef55657cd1478ddf2f1e0625bbcc

Download Submit
memory/724-86-0x0000000000090000-0x00000000000BE000-memory.dmp

Filesize
184KB

Download
memory/724-83-0x0000000000000000-mapping.dmp

Download
memory/724-88-0x0000000000900000-0x0000000000993000-memory.dmp

Filesize
588KB

Download
memory/724-85-0x00000000012B0000-0x00000000012BB000-memory.dmp

Filesize
44KB

Download
memory/724-87-0x0000000000A90000-0x0000000000D93000-memory.dmp

Filesize
3.0MB

Download
memory/940-84-0x0000000000000000-mapping.dmp

Download
memory/1084-68-0x0000000000000000-mapping.dmp

Download
memory/1084-72-0x00000000001B0000-0x00000000001B2000-memory.dmp

Filesize
8KB

Download
memory/1208-82-0x0000000004CF0000-0x0000000004E2A000-memory.dmp

Filesize
1.2MB

Download
memory/1208-89-0x0000000003D40000-0x0000000003DE7000-memory.dmp

Filesize
668KB

Download
memory/1208-76-0x0000000007340000-0x00000000074E2000-memory.dmp

Filesize
1.6MB

Download
memory/1500-74-0x0000000000780000-0x0000000000A83000-memory.dmp

Filesize
3.0MB

Download
memory/1500-75-0x0000000000360000-0x0000000000374000-memory.dmp

Filesize
80KB

Download
memory/1500-71-0x000000000041EC70-mapping.dmp

Download
memory/1500-73-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/1500-81-0x00000000003A0000-0x00000000003B4000-memory.dmp

Filesize
80KB

Download
memory/1648-60-0x000000002F791000-0x000000002F794000-memory.dmp

Filesize
12KB

Download
memory/1648-78-0x0000000005D20000-0x0000000005E7C000-memory.dmp

Filesize
1.4MB

Download
memory/1648-77-0x0000000005D20000-0x0000000005E7C000-memory.dmp

Filesize
1.4MB

Download
memory/1648-80-0x0000000005D20000-0x0000000005E7C000-memory.dmp

Filesize
1.4MB

Download
memory/1648-79-0x0000000005D20000-0x0000000005E7C000-memory.dmp

Filesize
1.4MB

Download
memory/1648-62-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1648-61-0x00000000716D1000-0x00000000716D3000-memory.dmp

Filesize
8KB

Download
memory/1648-90-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1960-63-0x0000000076641000-0x0000000076643000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads