formbook | 76b2d9b4655b8a349e1b5c7bf05ac5bb22bea988bc818e46756b17d7e22a37d1

Analysis

max time kernel
71s
max time network
13s
platform
windows7_x64
resource
win7v20201028
submitted
26-11-2020 06:13

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General

Target

PI202009255687.xlsx
Size

2.5MB
MD5

d7c0c12c1cdf36e9f97f96cb3fe16ae0
SHA1

e73e8bd48f5ef68747de444e44d59745cb75b08a
SHA256

76b2d9b4655b8a349e1b5c7bf05ac5bb22bea988bc818e46756b17d7e22a37d1
SHA512

1032c3abfa95c26c00c42b5bba0ef6bfd565b9391a255f7eb36f5edee271a46fac0e1a707c23a5820a307a76c4773a8b74f0f15efa2c594d6d79e953c52d5a7b

Score

10^/10

formbook rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

http://www.blog-cybersecurite.net/ogg/

Decoy

constmotion.com

castinginiciadas.com

dalvgroup.com

dmetuningkw.com

everygrindcount.com

lovewrendley.com

yourtallahassee.com

healer-jou.com

china-gadge.com

theplatinumworld.com

rakutenlle.xyz

neroflex.com

zdysks.com

e-learningorange.com

starbleach.com

apexappsllc.com

sinteredsurface.com

upcas.info

monetizemybizadvertisers.com

tsptoolbox.net

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/1152-8-0x0000000000070000-0x000000000009E000-memory.dmp	formbook
behavioral1/memory/1152-9-0x000000000008EB50-mapping.dmp	formbook
behavioral1/memory/1152-16-0x000000000008EB50-mapping.dmp	formbook

Blacklisted process makes network request 1 IoCs

Processes:

EQNEDT32.EXE

flow pid process

6 2000 EQNEDT32.EXE
Executes dropped EXE 2 IoCs

Processes:

vbc.exevbc.exe

pid process

1560 vbc.exe
1152 vbc.exe
Loads dropped DLL 7 IoCs

Processes:

EQNEDT32.EXEWerFault.exe

pid process

2000 EQNEDT32.EXE
2000 EQNEDT32.EXE
2000 EQNEDT32.EXE
2000 EQNEDT32.EXE
1856 WerFault.exe
1856 WerFault.exe
1856 WerFault.exe
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064
Suspicious use of SetThreadContext 1 IoCs

Processes:

vbc.exe

description pid process target process

PID 1560 set thread context of 1152 1560 vbc.exe vbc.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1856 1152 WerFault.exe vbc.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

2000 EQNEDT32.EXE

flow	pid	process
6	2000	EQNEDT32.EXE

pid	process
1560	vbc.exe
1152	vbc.exe

pid	process
2000	EQNEDT32.EXE
2000	EQNEDT32.EXE
2000	EQNEDT32.EXE
2000	EQNEDT32.EXE
1856	WerFault.exe
1856	WerFault.exe
1856	WerFault.exe

description	pid	process	target process
PID 1560 set thread context of 1152	1560	vbc.exe	vbc.exe

pid	pid_target	process	target process
1856	1152	WerFault.exe	vbc.exe

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

pid	process
2000	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\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	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
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\MenuExt\Se&nd to OneNote	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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1764 EXCEL.EXE
Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

WerFault.exe

pid process

1856 WerFault.exe
1856 WerFault.exe
1856 WerFault.exe
1856 WerFault.exe
1856 WerFault.exe
Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

vbc.exe

pid process

1560 vbc.exe
1560 vbc.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

WerFault.exe

description pid process

Token: SeDebugPrivilege 1856 WerFault.exe
Suspicious use of SetWindowsHookEx 7 IoCs

Processes:

EXCEL.EXE

pid process

1764 EXCEL.EXE
1764 EXCEL.EXE
1764 EXCEL.EXE
1764 EXCEL.EXE
1764 EXCEL.EXE
1764 EXCEL.EXE
1764 EXCEL.EXE

pid	process
1764	EXCEL.EXE

pid	process
1856	WerFault.exe
1856	WerFault.exe
1856	WerFault.exe
1856	WerFault.exe
1856	WerFault.exe

pid	process
1560	vbc.exe
1560	vbc.exe

description	pid	process
Token: SeDebugPrivilege	1856	WerFault.exe

pid	process
1764	EXCEL.EXE
1764	EXCEL.EXE
1764	EXCEL.EXE
1764	EXCEL.EXE
1764	EXCEL.EXE
1764	EXCEL.EXE
1764	EXCEL.EXE

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

EQNEDT32.EXEvbc.exevbc.exe

description	pid	process	target process
PID 2000 wrote to memory of 1560	2000	EQNEDT32.EXE	vbc.exe
PID 2000 wrote to memory of 1560	2000	EQNEDT32.EXE	vbc.exe
PID 2000 wrote to memory of 1560	2000	EQNEDT32.EXE	vbc.exe
PID 2000 wrote to memory of 1560	2000	EQNEDT32.EXE	vbc.exe
PID 1560 wrote to memory of 1152	1560	vbc.exe	vbc.exe
PID 1560 wrote to memory of 1152	1560	vbc.exe	vbc.exe
PID 1560 wrote to memory of 1152	1560	vbc.exe	vbc.exe
PID 1560 wrote to memory of 1152	1560	vbc.exe	vbc.exe
PID 1560 wrote to memory of 1152	1560	vbc.exe	vbc.exe
PID 1152 wrote to memory of 1856	1152	vbc.exe	WerFault.exe
PID 1152 wrote to memory of 1856	1152	vbc.exe	WerFault.exe
PID 1152 wrote to memory of 1856	1152	vbc.exe	WerFault.exe
PID 1152 wrote to memory of 1856	1152	vbc.exe	WerFault.exe

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\PI202009255687.xlsx
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:1764

C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
"C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
1⤵
- Blacklisted process makes network request
- Loads dropped DLL
- Launches Equation Editor
- Suspicious use of WriteProcessMemory
PID:2000

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:1560

C:\Users\Public\vbc.exe
"C:\Users\Public\vbc.exe"
3⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:1152

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1152 -s 36
4⤵
- Loads dropped DLL
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1856

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scripting

T1064

Exploitation for Client Execution

T1203

Persistence

Privilege Escalation

Defense Evasion

Scripting

T1064

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Public\vbc.exe
MD5
e54d832cb872b7dc086ab7a7878d38fb

SHA1
dd865deaffa4558eebebcb83b5335de2b0b26327

SHA256
06a0e3845d7b4c5593a9143eb1ae73223760d68f2acf0e5be631b9eeab3675f3

SHA512
04a78936551df1bf62d4b256c2a5888af840d9f1fb1735810b1c5145af0795c6c84e03b66754137242691aa0ffa26ceb7295d3cdc59323b939daa8d7cb24bac0

Download Submit
C:\Users\Public\vbc.exe
MD5
e54d832cb872b7dc086ab7a7878d38fb

SHA1
dd865deaffa4558eebebcb83b5335de2b0b26327

SHA256
06a0e3845d7b4c5593a9143eb1ae73223760d68f2acf0e5be631b9eeab3675f3

SHA512
04a78936551df1bf62d4b256c2a5888af840d9f1fb1735810b1c5145af0795c6c84e03b66754137242691aa0ffa26ceb7295d3cdc59323b939daa8d7cb24bac0

Download Submit
C:\Users\Public\vbc.exe
MD5
e54d832cb872b7dc086ab7a7878d38fb

SHA1
dd865deaffa4558eebebcb83b5335de2b0b26327

SHA256
06a0e3845d7b4c5593a9143eb1ae73223760d68f2acf0e5be631b9eeab3675f3

SHA512
04a78936551df1bf62d4b256c2a5888af840d9f1fb1735810b1c5145af0795c6c84e03b66754137242691aa0ffa26ceb7295d3cdc59323b939daa8d7cb24bac0

Download Submit
\Users\Public\vbc.exe
MD5
e54d832cb872b7dc086ab7a7878d38fb

SHA1
dd865deaffa4558eebebcb83b5335de2b0b26327

SHA256
06a0e3845d7b4c5593a9143eb1ae73223760d68f2acf0e5be631b9eeab3675f3

SHA512
04a78936551df1bf62d4b256c2a5888af840d9f1fb1735810b1c5145af0795c6c84e03b66754137242691aa0ffa26ceb7295d3cdc59323b939daa8d7cb24bac0

Download Submit
\Users\Public\vbc.exe
MD5
e54d832cb872b7dc086ab7a7878d38fb

SHA1
dd865deaffa4558eebebcb83b5335de2b0b26327

SHA256
06a0e3845d7b4c5593a9143eb1ae73223760d68f2acf0e5be631b9eeab3675f3

SHA512
04a78936551df1bf62d4b256c2a5888af840d9f1fb1735810b1c5145af0795c6c84e03b66754137242691aa0ffa26ceb7295d3cdc59323b939daa8d7cb24bac0

Download Submit
\Users\Public\vbc.exe
MD5
e54d832cb872b7dc086ab7a7878d38fb

SHA1
dd865deaffa4558eebebcb83b5335de2b0b26327

SHA256
06a0e3845d7b4c5593a9143eb1ae73223760d68f2acf0e5be631b9eeab3675f3

SHA512
04a78936551df1bf62d4b256c2a5888af840d9f1fb1735810b1c5145af0795c6c84e03b66754137242691aa0ffa26ceb7295d3cdc59323b939daa8d7cb24bac0

Download Submit
\Users\Public\vbc.exe
MD5
e54d832cb872b7dc086ab7a7878d38fb

SHA1
dd865deaffa4558eebebcb83b5335de2b0b26327

SHA256
06a0e3845d7b4c5593a9143eb1ae73223760d68f2acf0e5be631b9eeab3675f3

SHA512
04a78936551df1bf62d4b256c2a5888af840d9f1fb1735810b1c5145af0795c6c84e03b66754137242691aa0ffa26ceb7295d3cdc59323b939daa8d7cb24bac0

Download Submit
\Users\Public\vbc.exe
MD5
e54d832cb872b7dc086ab7a7878d38fb

SHA1
dd865deaffa4558eebebcb83b5335de2b0b26327

SHA256
06a0e3845d7b4c5593a9143eb1ae73223760d68f2acf0e5be631b9eeab3675f3

SHA512
04a78936551df1bf62d4b256c2a5888af840d9f1fb1735810b1c5145af0795c6c84e03b66754137242691aa0ffa26ceb7295d3cdc59323b939daa8d7cb24bac0

Download Submit
\Users\Public\vbc.exe
MD5
e54d832cb872b7dc086ab7a7878d38fb

SHA1
dd865deaffa4558eebebcb83b5335de2b0b26327

SHA256
06a0e3845d7b4c5593a9143eb1ae73223760d68f2acf0e5be631b9eeab3675f3

SHA512
04a78936551df1bf62d4b256c2a5888af840d9f1fb1735810b1c5145af0795c6c84e03b66754137242691aa0ffa26ceb7295d3cdc59323b939daa8d7cb24bac0

Download Submit
\Users\Public\vbc.exe
MD5
e54d832cb872b7dc086ab7a7878d38fb

SHA1
dd865deaffa4558eebebcb83b5335de2b0b26327

SHA256
06a0e3845d7b4c5593a9143eb1ae73223760d68f2acf0e5be631b9eeab3675f3

SHA512
04a78936551df1bf62d4b256c2a5888af840d9f1fb1735810b1c5145af0795c6c84e03b66754137242691aa0ffa26ceb7295d3cdc59323b939daa8d7cb24bac0

Download Submit
memory/1152-8-0x0000000000070000-0x000000000009E000-memory.dmp

Filesize
184KB

Download
memory/1152-9-0x000000000008EB50-mapping.dmp

Download
memory/1152-16-0x000000000008EB50-mapping.dmp

Download
memory/1560-5-0x0000000000000000-mapping.dmp

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memory/1856-12-0x0000000000000000-mapping.dmp

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memory/1856-13-0x0000000001F80000-0x0000000001F91000-memory.dmp

Filesize
68KB

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memory/1856-17-0x00000000025A0000-0x00000000025B1000-memory.dmp

Filesize
68KB

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memory/1856-19-0x00000000025A0000-0x00000000025B1000-memory.dmp

Filesize
68KB

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memory/1888-0-0x000007FEF7F80000-0x000007FEF81FA000-memory.dmp

Filesize
2.5MB

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