formbook | c92aaf449b1938cb5918e73f02936eab06b7974fa441492bea95e9c68c5e5084

Analysis

max time kernel
146s
max time network
177s
platform
windows7_x64
resource
win7v20210408
submitted
22-06-2021 15:04

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General

Target

Payment Ref 24,845.docx
Size

10KB
MD5

ccd4c28726088c338206933392b234cb
SHA1

0f2a9d2e7804e793afcc6e8e7a3a561f75bf4bea
SHA256

c92aaf449b1938cb5918e73f02936eab06b7974fa441492bea95e9c68c5e5084
SHA512

328ce30627e667a5a3431bb6cdb127c24d8e3202a6e771b0f438022f55a4e7a743afaf4c3fb7d75875a60815427882e784f124521721fd79161dfb58712da26a

Score

10^/10

formbook rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

http://www.dragonpalcenk.com/k8n/

Decoy

foxynailserie.com

thenoyzees.com

waterrising.xyz

allmister.com

theguyscave.com

erkitap.com

spyder-club.com

raskrutisam.com

giantledlights.com

wowbeautynails.com

youmovies.site

abjms.com

enso-solutions.com

seasonalcampgroundsmn.com

lukeprater.com

mufasacapital.com

idi360.com

mask-cleaner.com

aeruswilmde.com

venkatlifecoach.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/344-80-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral1/memory/344-81-0x000000000041EB40-mapping.dmp	formbook
behavioral1/memory/2040-90-0x0000000000070000-0x000000000009E000-memory.dmp	formbook

Blocklisted process makes network request 1 IoCs

Processes:

EQNEDT32.EXE

flow pid process

12 1756 EQNEDT32.EXE
Downloads MZ/PE file
Executes dropped EXE 4 IoCs

Processes:

vbc.exevbc.exevbc.exevbc.exe

pid process

2028 vbc.exe
1244 vbc.exe
616 vbc.exe
344 vbc.exe

flow	pid	process
12	1756	EQNEDT32.EXE

Abuses OpenXML format to download file from external location 2 IoCs

Processes:

WINWORD.EXE

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar	WINWORD.EXE
Key opened	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Office\Common\Offline\Files\https://itsssl.com/vyQCm	WINWORD.EXE

Loads dropped DLL 4 IoCs

Processes:

EQNEDT32.EXE

pid process

1756 EQNEDT32.EXE
1756 EQNEDT32.EXE
1756 EQNEDT32.EXE
1756 EQNEDT32.EXE
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

pid	process
1756	EQNEDT32.EXE
1756	EQNEDT32.EXE
1756	EQNEDT32.EXE
1756	EQNEDT32.EXE

Suspicious use of SetThreadContext 3 IoCs

Processes:

vbc.exevbc.execscript.exe

description	pid	process	target process
PID 2028 set thread context of 344	2028	vbc.exe	vbc.exe
PID 344 set thread context of 1200	344	vbc.exe	Explorer.EXE
PID 2040 set thread context of 1200	2040	cscript.exe	Explorer.EXE

Drops file in Windows directory 1 IoCs

Processes:

WINWORD.EXE

description ioc process

File opened for modification C:\Windows\Debug\WIA\wiatrace.log WINWORD.EXE
Office loads VBA resources, possible macro or embedded object present
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

1756 EQNEDT32.EXE

description	ioc	process
File opened for modification	C:\Windows\Debug\WIA\wiatrace.log	WINWORD.EXE

pid	process
1756	EQNEDT32.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

Processes:

WINWORD.EXE

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt	WINWORD.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"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	WINWORD.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"	WINWORD.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"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	WINWORD.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"	WINWORD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

WINWORD.EXE

pid process

1944 WINWORD.EXE

pid	process
1944	WINWORD.EXE

Suspicious behavior: EnumeratesProcesses 18 IoCs

Processes:

vbc.exevbc.execscript.exe

pid	process
2028	vbc.exe
2028	vbc.exe
2028	vbc.exe
2028	vbc.exe
2028	vbc.exe
344	vbc.exe
344	vbc.exe
2040	cscript.exe
2040	cscript.exe
2040	cscript.exe
2040	cscript.exe
2040	cscript.exe
2040	cscript.exe
2040	cscript.exe
2040	cscript.exe
2040	cscript.exe
2040	cscript.exe
2040	cscript.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

1200 Explorer.EXE
Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

vbc.execscript.exe

pid process

344 vbc.exe
344 vbc.exe
344 vbc.exe
2040 cscript.exe
2040 cscript.exe

pid	process
1200	Explorer.EXE

pid	process
344	vbc.exe
344	vbc.exe
344	vbc.exe
2040	cscript.exe
2040	cscript.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

Processes:

vbc.exevbc.execscript.exeExplorer.EXEWINWORD.EXE

description	pid	process
Token: SeDebugPrivilege	2028	vbc.exe
Token: SeDebugPrivilege	344	vbc.exe
Token: SeDebugPrivilege	2040	cscript.exe
Token: SeShutdownPrivilege	1200	Explorer.EXE
Token: SeShutdownPrivilege	1944	WINWORD.EXE
Token: SeShutdownPrivilege	1200	Explorer.EXE
Token: SeShutdownPrivilege	1200	Explorer.EXE
Token: SeShutdownPrivilege	1200	Explorer.EXE

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

WINWORD.EXE

pid process

1944 WINWORD.EXE
1944 WINWORD.EXE

pid	process
1944	WINWORD.EXE
1944	WINWORD.EXE

Suspicious use of WriteProcessMemory 31 IoCs

Processes:

EQNEDT32.EXEWINWORD.EXEvbc.exeExplorer.EXEcscript.exe

description	pid	process	target process
PID 1756 wrote to memory of 2028	1756	EQNEDT32.EXE	vbc.exe
PID 1756 wrote to memory of 2028	1756	EQNEDT32.EXE	vbc.exe
PID 1756 wrote to memory of 2028	1756	EQNEDT32.EXE	vbc.exe
PID 1756 wrote to memory of 2028	1756	EQNEDT32.EXE	vbc.exe
PID 1944 wrote to memory of 884	1944	WINWORD.EXE	splwow64.exe
PID 1944 wrote to memory of 884	1944	WINWORD.EXE	splwow64.exe
PID 1944 wrote to memory of 884	1944	WINWORD.EXE	splwow64.exe
PID 1944 wrote to memory of 884	1944	WINWORD.EXE	splwow64.exe
PID 2028 wrote to memory of 1244	2028	vbc.exe	vbc.exe
PID 2028 wrote to memory of 1244	2028	vbc.exe	vbc.exe
PID 2028 wrote to memory of 1244	2028	vbc.exe	vbc.exe
PID 2028 wrote to memory of 1244	2028	vbc.exe	vbc.exe
PID 2028 wrote to memory of 616	2028	vbc.exe	vbc.exe
PID 2028 wrote to memory of 616	2028	vbc.exe	vbc.exe
PID 2028 wrote to memory of 616	2028	vbc.exe	vbc.exe
PID 2028 wrote to memory of 616	2028	vbc.exe	vbc.exe
PID 2028 wrote to memory of 344	2028	vbc.exe	vbc.exe
PID 2028 wrote to memory of 344	2028	vbc.exe	vbc.exe
PID 2028 wrote to memory of 344	2028	vbc.exe	vbc.exe
PID 2028 wrote to memory of 344	2028	vbc.exe	vbc.exe
PID 2028 wrote to memory of 344	2028	vbc.exe	vbc.exe
PID 2028 wrote to memory of 344	2028	vbc.exe	vbc.exe
PID 2028 wrote to memory of 344	2028	vbc.exe	vbc.exe
PID 1200 wrote to memory of 2040	1200	Explorer.EXE	cscript.exe
PID 1200 wrote to memory of 2040	1200	Explorer.EXE	cscript.exe
PID 1200 wrote to memory of 2040	1200	Explorer.EXE	cscript.exe
PID 1200 wrote to memory of 2040	1200	Explorer.EXE	cscript.exe
PID 2040 wrote to memory of 1824	2040	cscript.exe	cmd.exe
PID 2040 wrote to memory of 1824	2040	cscript.exe	cmd.exe
PID 2040 wrote to memory of 1824	2040	cscript.exe	cmd.exe
PID 2040 wrote to memory of 1824	2040	cscript.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1200

C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\Payment Ref 24,845.docx"
2⤵
- Abuses OpenXML format to download file from external location
- Drops file in Windows directory
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1944

C:\Windows\splwow64.exe
C:\Windows\splwow64.exe 12288
3⤵
PID:884

C:\Windows\SysWOW64\cscript.exe
"C:\Windows\SysWOW64\cscript.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2040

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Public\vbc.exe"
3⤵
PID:1824

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:1756

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:2028

C:\Users\Public\vbc.exe
"C:\Users\Public\vbc.exe"
3⤵
- Executes dropped EXE
PID:1244

C:\Users\Public\vbc.exe
"C:\Users\Public\vbc.exe"
3⤵
- Executes dropped EXE
PID:616

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:344

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

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Public\vbc.exe
MD5
e7ab6f20b9320cf5f2537f2e402bb106

SHA1
569f0fdbf99d05af519759f9b0bf392d8e6608ed

SHA256
9f7fd0ad05c3b8f6d3945a0753b7b20fc53528cfbf7c8b4a2ab7f49795937b44

SHA512
4aa8de9ac929ff3f26a7296336990584cd3e0d467a9e6da49689dc72f6ef0becb0c96a653e74213d829f88ef12c060adb0cb8f7a506e0a75565a1a073d06a50c

Download Submit
C:\Users\Public\vbc.exe
MD5
e7ab6f20b9320cf5f2537f2e402bb106

SHA1
569f0fdbf99d05af519759f9b0bf392d8e6608ed

SHA256
9f7fd0ad05c3b8f6d3945a0753b7b20fc53528cfbf7c8b4a2ab7f49795937b44

SHA512
4aa8de9ac929ff3f26a7296336990584cd3e0d467a9e6da49689dc72f6ef0becb0c96a653e74213d829f88ef12c060adb0cb8f7a506e0a75565a1a073d06a50c

Download Submit
C:\Users\Public\vbc.exe
MD5
e7ab6f20b9320cf5f2537f2e402bb106

SHA1
569f0fdbf99d05af519759f9b0bf392d8e6608ed

SHA256
9f7fd0ad05c3b8f6d3945a0753b7b20fc53528cfbf7c8b4a2ab7f49795937b44

SHA512
4aa8de9ac929ff3f26a7296336990584cd3e0d467a9e6da49689dc72f6ef0becb0c96a653e74213d829f88ef12c060adb0cb8f7a506e0a75565a1a073d06a50c

Download Submit
C:\Users\Public\vbc.exe
MD5
e7ab6f20b9320cf5f2537f2e402bb106

SHA1
569f0fdbf99d05af519759f9b0bf392d8e6608ed

SHA256
9f7fd0ad05c3b8f6d3945a0753b7b20fc53528cfbf7c8b4a2ab7f49795937b44

SHA512
4aa8de9ac929ff3f26a7296336990584cd3e0d467a9e6da49689dc72f6ef0becb0c96a653e74213d829f88ef12c060adb0cb8f7a506e0a75565a1a073d06a50c

Download Submit
C:\Users\Public\vbc.exe
MD5
e7ab6f20b9320cf5f2537f2e402bb106

SHA1
569f0fdbf99d05af519759f9b0bf392d8e6608ed

SHA256
9f7fd0ad05c3b8f6d3945a0753b7b20fc53528cfbf7c8b4a2ab7f49795937b44

SHA512
4aa8de9ac929ff3f26a7296336990584cd3e0d467a9e6da49689dc72f6ef0becb0c96a653e74213d829f88ef12c060adb0cb8f7a506e0a75565a1a073d06a50c

Download Submit
\Users\Public\vbc.exe
MD5
e7ab6f20b9320cf5f2537f2e402bb106

SHA1
569f0fdbf99d05af519759f9b0bf392d8e6608ed

SHA256
9f7fd0ad05c3b8f6d3945a0753b7b20fc53528cfbf7c8b4a2ab7f49795937b44

SHA512
4aa8de9ac929ff3f26a7296336990584cd3e0d467a9e6da49689dc72f6ef0becb0c96a653e74213d829f88ef12c060adb0cb8f7a506e0a75565a1a073d06a50c

Download Submit
\Users\Public\vbc.exe
MD5
e7ab6f20b9320cf5f2537f2e402bb106

SHA1
569f0fdbf99d05af519759f9b0bf392d8e6608ed

SHA256
9f7fd0ad05c3b8f6d3945a0753b7b20fc53528cfbf7c8b4a2ab7f49795937b44

SHA512
4aa8de9ac929ff3f26a7296336990584cd3e0d467a9e6da49689dc72f6ef0becb0c96a653e74213d829f88ef12c060adb0cb8f7a506e0a75565a1a073d06a50c

Download Submit
\Users\Public\vbc.exe
MD5
e7ab6f20b9320cf5f2537f2e402bb106

SHA1
569f0fdbf99d05af519759f9b0bf392d8e6608ed

SHA256
9f7fd0ad05c3b8f6d3945a0753b7b20fc53528cfbf7c8b4a2ab7f49795937b44

SHA512
4aa8de9ac929ff3f26a7296336990584cd3e0d467a9e6da49689dc72f6ef0becb0c96a653e74213d829f88ef12c060adb0cb8f7a506e0a75565a1a073d06a50c

Download Submit
\Users\Public\vbc.exe
MD5
e7ab6f20b9320cf5f2537f2e402bb106

SHA1
569f0fdbf99d05af519759f9b0bf392d8e6608ed

SHA256
9f7fd0ad05c3b8f6d3945a0753b7b20fc53528cfbf7c8b4a2ab7f49795937b44

SHA512
4aa8de9ac929ff3f26a7296336990584cd3e0d467a9e6da49689dc72f6ef0becb0c96a653e74213d829f88ef12c060adb0cb8f7a506e0a75565a1a073d06a50c

Download Submit
memory/344-85-0x0000000000200000-0x0000000000214000-memory.dmp

Filesize
80KB

Download
memory/344-84-0x0000000000910000-0x0000000000C13000-memory.dmp

Filesize
3.0MB

Download
memory/344-81-0x000000000041EB40-mapping.dmp

Download
memory/344-80-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/884-72-0x0000000000000000-mapping.dmp

Download
memory/884-73-0x000007FEFBBB1000-0x000007FEFBBB3000-memory.dmp

Filesize
8KB

Download
memory/1200-94-0x0000000007040000-0x0000000007196000-memory.dmp

Filesize
1.3MB

Download
memory/1200-86-0x0000000006120000-0x00000000062AC000-memory.dmp

Filesize
1.5MB

Download
memory/1756-62-0x0000000075FF1000-0x0000000075FF3000-memory.dmp

Filesize
8KB

Download
memory/1824-88-0x0000000000000000-mapping.dmp

Download
memory/1944-59-0x0000000072511000-0x0000000072514000-memory.dmp

Filesize
12KB

Download
memory/1944-61-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1944-93-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1944-60-0x000000006FF91000-0x000000006FF93000-memory.dmp

Filesize
8KB

Download
memory/2028-67-0x0000000000000000-mapping.dmp

Download
memory/2028-77-0x0000000000640000-0x000000000067D000-memory.dmp

Filesize
244KB

Download
memory/2028-76-0x00000000054C0000-0x0000000005539000-memory.dmp

Filesize
484KB

Download
memory/2028-75-0x0000000000210000-0x0000000000220000-memory.dmp

Filesize
64KB

Download
memory/2028-74-0x0000000004E80000-0x0000000004E81000-memory.dmp

Filesize
4KB

Download
memory/2028-70-0x0000000000220000-0x0000000000221000-memory.dmp

Filesize
4KB

Download
memory/2040-87-0x0000000000000000-mapping.dmp

Download
memory/2040-90-0x0000000000070000-0x000000000009E000-memory.dmp

Filesize
184KB

Download
memory/2040-91-0x0000000002080000-0x0000000002383000-memory.dmp

Filesize
3.0MB

Download
memory/2040-89-0x0000000000C50000-0x0000000000C72000-memory.dmp

Filesize
136KB

Download
memory/2040-92-0x0000000000830000-0x00000000008C3000-memory.dmp

Filesize
588KB

Download