formbook | 836390a3bb832e2b10fb7bf5ee0d88e7aa32179839e65b933ff2da2aabce8f89

Analysis

max time kernel
150s
max time network
150s
platform
windows7_x64
resource
win7v20201028
submitted
10-12-2020 10:17

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General

Target

836390a3bb832e2b10fb7bf5ee0d88e7aa32179839e65b933ff2da2aabce8f89.xlsx
Size

2.1MB
MD5

c30d91c05ecd94de4ee314be1f27bf22
SHA1

fed9790f0ebc832445b34ef1caabe137ed15e3ce
SHA256

836390a3bb832e2b10fb7bf5ee0d88e7aa32179839e65b933ff2da2aabce8f89
SHA512

0053323cf2d7fada473a23ddaffd7be38f3015613f651c15bc10d524db3a656c7ed20d522feb9a7f3183efeb3588d53865a3a9d259c7707ce1dbbf2d2981fcfb

Score

10^/10

formbook xloader loader rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

http://www.herbmedia.net/csv8/

Decoy

slgacha.com

oohdough.com

6983ylc.com

aykassociate.com

latin-hotspot.com

starrockindia.com

beamsubway.com

queensboutique1000.com

madbaddie.com

bhoomimart.com

ankitparivar.com

aldanasanchezmx.com

citest1597669833.com

cristianofreitas.com

myplantus.com

counterfeitmilk.com

8xf39.com

pregnantwomens.com

yyyut6.com

stnanguo.com

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/1996-68-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral1/memory/1996-69-0x000000000041D0C0-mapping.dmp	xloader
behavioral1/memory/912-71-0x0000000000000000-mapping.dmp	xloader

Blocklisted process makes network request 1 IoCs

Processes:

EQNEDT32.EXE

flow pid process

5 1512 EQNEDT32.EXE
Executes dropped EXE 6 IoCs

Processes:

vbc.exevbc.exevbc.exevbc.exevbc.exevbc.exe

pid process

1424 vbc.exe
1516 vbc.exe
316 vbc.exe
1064 vbc.exe
1628 vbc.exe
1996 vbc.exe
Loads dropped DLL 4 IoCs

Processes:

EQNEDT32.EXE

pid process

1512 EQNEDT32.EXE
1512 EQNEDT32.EXE
1512 EQNEDT32.EXE
1512 EQNEDT32.EXE
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

flow	pid	process
5	1512	EQNEDT32.EXE

pid	process
1512	EQNEDT32.EXE
1512	EQNEDT32.EXE
1512	EQNEDT32.EXE
1512	EQNEDT32.EXE

Suspicious use of SetThreadContext 4 IoCs

Processes:

vbc.exevbc.execolorcpl.exe

description	pid	process	target process
PID 1424 set thread context of 1996	1424	vbc.exe	vbc.exe
PID 1996 set thread context of 1244	1996	vbc.exe	Explorer.EXE
PID 1996 set thread context of 1244	1996	vbc.exe	Explorer.EXE
PID 912 set thread context of 1244	912	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

1512 EQNEDT32.EXE

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

pid	process
1512	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
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 (int)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	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
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
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1824 EXCEL.EXE

pid	process
1824	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 30 IoCs

Processes:

vbc.exevbc.execolorcpl.exe

pid	process
1424	vbc.exe
1424	vbc.exe
1424	vbc.exe
1424	vbc.exe
1424	vbc.exe
1424	vbc.exe
1424	vbc.exe
1424	vbc.exe
1424	vbc.exe
1424	vbc.exe
1996	vbc.exe
1996	vbc.exe
1996	vbc.exe
912	colorcpl.exe
912	colorcpl.exe
912	colorcpl.exe
912	colorcpl.exe
912	colorcpl.exe
912	colorcpl.exe
912	colorcpl.exe
912	colorcpl.exe
912	colorcpl.exe
912	colorcpl.exe
912	colorcpl.exe
912	colorcpl.exe
912	colorcpl.exe
912	colorcpl.exe
912	colorcpl.exe
912	colorcpl.exe
912	colorcpl.exe

Suspicious behavior: MapViewOfSection 6 IoCs

Processes:

vbc.execolorcpl.exe

pid process

1996 vbc.exe
1996 vbc.exe
1996 vbc.exe
1996 vbc.exe
912 colorcpl.exe
912 colorcpl.exe

pid	process
1996	vbc.exe
1996	vbc.exe
1996	vbc.exe
1996	vbc.exe
912	colorcpl.exe
912	colorcpl.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

vbc.exevbc.execolorcpl.exeExplorer.EXE

description	pid	process
Token: SeDebugPrivilege	1424	vbc.exe
Token: SeDebugPrivilege	1996	vbc.exe
Token: SeDebugPrivilege	912	colorcpl.exe
Token: SeShutdownPrivilege	1244	Explorer.EXE
Token: SeShutdownPrivilege	1244	Explorer.EXE

Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

Explorer.EXE

pid process

1244 Explorer.EXE
1244 Explorer.EXE
1244 Explorer.EXE
1244 Explorer.EXE
Suspicious use of SendNotifyMessage 4 IoCs

Processes:

Explorer.EXE

pid process

1244 Explorer.EXE
1244 Explorer.EXE
1244 Explorer.EXE
1244 Explorer.EXE
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

1824 EXCEL.EXE
1824 EXCEL.EXE
1824 EXCEL.EXE

pid	process
1244	Explorer.EXE
1244	Explorer.EXE
1244	Explorer.EXE
1244	Explorer.EXE

pid	process
1244	Explorer.EXE
1244	Explorer.EXE
1244	Explorer.EXE
1244	Explorer.EXE

pid	process
1824	EXCEL.EXE
1824	EXCEL.EXE
1824	EXCEL.EXE

Suspicious use of WriteProcessMemory 35 IoCs

Processes:

EQNEDT32.EXEvbc.exeExplorer.EXEcolorcpl.exe

description	pid	process	target process
PID 1512 wrote to memory of 1424	1512	EQNEDT32.EXE	vbc.exe
PID 1512 wrote to memory of 1424	1512	EQNEDT32.EXE	vbc.exe
PID 1512 wrote to memory of 1424	1512	EQNEDT32.EXE	vbc.exe
PID 1512 wrote to memory of 1424	1512	EQNEDT32.EXE	vbc.exe
PID 1424 wrote to memory of 1516	1424	vbc.exe	vbc.exe
PID 1424 wrote to memory of 1516	1424	vbc.exe	vbc.exe
PID 1424 wrote to memory of 1516	1424	vbc.exe	vbc.exe
PID 1424 wrote to memory of 1516	1424	vbc.exe	vbc.exe
PID 1424 wrote to memory of 316	1424	vbc.exe	vbc.exe
PID 1424 wrote to memory of 316	1424	vbc.exe	vbc.exe
PID 1424 wrote to memory of 316	1424	vbc.exe	vbc.exe
PID 1424 wrote to memory of 316	1424	vbc.exe	vbc.exe
PID 1424 wrote to memory of 1064	1424	vbc.exe	vbc.exe
PID 1424 wrote to memory of 1064	1424	vbc.exe	vbc.exe
PID 1424 wrote to memory of 1064	1424	vbc.exe	vbc.exe
PID 1424 wrote to memory of 1064	1424	vbc.exe	vbc.exe
PID 1424 wrote to memory of 1628	1424	vbc.exe	vbc.exe
PID 1424 wrote to memory of 1628	1424	vbc.exe	vbc.exe
PID 1424 wrote to memory of 1628	1424	vbc.exe	vbc.exe
PID 1424 wrote to memory of 1628	1424	vbc.exe	vbc.exe
PID 1424 wrote to memory of 1996	1424	vbc.exe	vbc.exe
PID 1424 wrote to memory of 1996	1424	vbc.exe	vbc.exe
PID 1424 wrote to memory of 1996	1424	vbc.exe	vbc.exe
PID 1424 wrote to memory of 1996	1424	vbc.exe	vbc.exe
PID 1424 wrote to memory of 1996	1424	vbc.exe	vbc.exe
PID 1424 wrote to memory of 1996	1424	vbc.exe	vbc.exe
PID 1424 wrote to memory of 1996	1424	vbc.exe	vbc.exe
PID 1244 wrote to memory of 912	1244	Explorer.EXE	colorcpl.exe
PID 1244 wrote to memory of 912	1244	Explorer.EXE	colorcpl.exe
PID 1244 wrote to memory of 912	1244	Explorer.EXE	colorcpl.exe
PID 1244 wrote to memory of 912	1244	Explorer.EXE	colorcpl.exe
PID 912 wrote to memory of 1476	912	colorcpl.exe	cmd.exe
PID 912 wrote to memory of 1476	912	colorcpl.exe	cmd.exe
PID 912 wrote to memory of 1476	912	colorcpl.exe	cmd.exe
PID 912 wrote to memory of 1476	912	colorcpl.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1244
- 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\836390a3bb832e2b10fb7bf5ee0d88e7aa32179839e65b933ff2da2aabce8f89.xlsx
  2⤵
  - Enumerates system info in registry
  - Modifies Internet Explorer settings
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious use of SetWindowsHookEx
  PID:1824
- 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:912
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Public\vbc.exe"
    3⤵
    PID:1476

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:1512
- 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:1424
- - C:\Users\Public\vbc.exe
    "{path}"
    3⤵
    - Executes dropped EXE
    PID:1516
- - C:\Users\Public\vbc.exe
    "{path}"
    3⤵
    - Executes dropped EXE
    PID:316
- - C:\Users\Public\vbc.exe
    "{path}"
    3⤵
    - Executes dropped EXE
    PID:1064
- - 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:1996
- - C:\Users\Public\vbc.exe
    "{path}"
    3⤵
    - Executes dropped EXE
    PID:1628

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Exploitation for Client Execution

T1203

Scripting

T1064

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Scripting

T1064

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Public\vbc.exe

MD5
a79d979e02199dbf4e15bfd8f47d5339

SHA1
f81614e383b471da2e5400fe7eb581dc6a6ef602

SHA256
84afc84c836007aa963472bb7db3ad4d2440e8fd79f7a9a2311a80c380f037a9

SHA512
0ef39e4e97b293623271d76b79cb8a17765ab081801313aa08b3755d395b75326f6c81a2192dec85f26cfbbe0a61366b742abfb18394b551c20fbdce25190e1a

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

MD5
a79d979e02199dbf4e15bfd8f47d5339

SHA1
f81614e383b471da2e5400fe7eb581dc6a6ef602

SHA256
84afc84c836007aa963472bb7db3ad4d2440e8fd79f7a9a2311a80c380f037a9

SHA512
0ef39e4e97b293623271d76b79cb8a17765ab081801313aa08b3755d395b75326f6c81a2192dec85f26cfbbe0a61366b742abfb18394b551c20fbdce25190e1a

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

MD5
a79d979e02199dbf4e15bfd8f47d5339

SHA1
f81614e383b471da2e5400fe7eb581dc6a6ef602

SHA256
84afc84c836007aa963472bb7db3ad4d2440e8fd79f7a9a2311a80c380f037a9

SHA512
0ef39e4e97b293623271d76b79cb8a17765ab081801313aa08b3755d395b75326f6c81a2192dec85f26cfbbe0a61366b742abfb18394b551c20fbdce25190e1a

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

MD5
a79d979e02199dbf4e15bfd8f47d5339

SHA1
f81614e383b471da2e5400fe7eb581dc6a6ef602

SHA256
84afc84c836007aa963472bb7db3ad4d2440e8fd79f7a9a2311a80c380f037a9

SHA512
0ef39e4e97b293623271d76b79cb8a17765ab081801313aa08b3755d395b75326f6c81a2192dec85f26cfbbe0a61366b742abfb18394b551c20fbdce25190e1a

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

MD5
a79d979e02199dbf4e15bfd8f47d5339

SHA1
f81614e383b471da2e5400fe7eb581dc6a6ef602

SHA256
84afc84c836007aa963472bb7db3ad4d2440e8fd79f7a9a2311a80c380f037a9

SHA512
0ef39e4e97b293623271d76b79cb8a17765ab081801313aa08b3755d395b75326f6c81a2192dec85f26cfbbe0a61366b742abfb18394b551c20fbdce25190e1a

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

MD5
a79d979e02199dbf4e15bfd8f47d5339

SHA1
f81614e383b471da2e5400fe7eb581dc6a6ef602

SHA256
84afc84c836007aa963472bb7db3ad4d2440e8fd79f7a9a2311a80c380f037a9

SHA512
0ef39e4e97b293623271d76b79cb8a17765ab081801313aa08b3755d395b75326f6c81a2192dec85f26cfbbe0a61366b742abfb18394b551c20fbdce25190e1a

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

MD5
a79d979e02199dbf4e15bfd8f47d5339

SHA1
f81614e383b471da2e5400fe7eb581dc6a6ef602

SHA256
84afc84c836007aa963472bb7db3ad4d2440e8fd79f7a9a2311a80c380f037a9

SHA512
0ef39e4e97b293623271d76b79cb8a17765ab081801313aa08b3755d395b75326f6c81a2192dec85f26cfbbe0a61366b742abfb18394b551c20fbdce25190e1a

Download Submit
\Users\Public\vbc.exe

MD5
a79d979e02199dbf4e15bfd8f47d5339

SHA1
f81614e383b471da2e5400fe7eb581dc6a6ef602

SHA256
84afc84c836007aa963472bb7db3ad4d2440e8fd79f7a9a2311a80c380f037a9

SHA512
0ef39e4e97b293623271d76b79cb8a17765ab081801313aa08b3755d395b75326f6c81a2192dec85f26cfbbe0a61366b742abfb18394b551c20fbdce25190e1a

Download Submit
\Users\Public\vbc.exe

MD5
a79d979e02199dbf4e15bfd8f47d5339

SHA1
f81614e383b471da2e5400fe7eb581dc6a6ef602

SHA256
84afc84c836007aa963472bb7db3ad4d2440e8fd79f7a9a2311a80c380f037a9

SHA512
0ef39e4e97b293623271d76b79cb8a17765ab081801313aa08b3755d395b75326f6c81a2192dec85f26cfbbe0a61366b742abfb18394b551c20fbdce25190e1a

Download Submit
\Users\Public\vbc.exe

MD5
a79d979e02199dbf4e15bfd8f47d5339

SHA1
f81614e383b471da2e5400fe7eb581dc6a6ef602

SHA256
84afc84c836007aa963472bb7db3ad4d2440e8fd79f7a9a2311a80c380f037a9

SHA512
0ef39e4e97b293623271d76b79cb8a17765ab081801313aa08b3755d395b75326f6c81a2192dec85f26cfbbe0a61366b742abfb18394b551c20fbdce25190e1a

Download Submit
\Users\Public\vbc.exe

MD5
a79d979e02199dbf4e15bfd8f47d5339

SHA1
f81614e383b471da2e5400fe7eb581dc6a6ef602

SHA256
84afc84c836007aa963472bb7db3ad4d2440e8fd79f7a9a2311a80c380f037a9

SHA512
0ef39e4e97b293623271d76b79cb8a17765ab081801313aa08b3755d395b75326f6c81a2192dec85f26cfbbe0a61366b742abfb18394b551c20fbdce25190e1a

Download Submit
memory/792-2-0x000007FEF5B50000-0x000007FEF5DCA000-memory.dmp

Filesize
2.5MB

Download
memory/912-71-0x0000000000000000-mapping.dmp

Download
memory/912-72-0x0000000000D20000-0x0000000000D38000-memory.dmp

Filesize
96KB

Download
memory/912-74-0x0000000004300000-0x00000000043D9000-memory.dmp

Filesize
868KB

Download
memory/1424-63-0x0000000006940000-0x00000000069A1000-memory.dmp

Filesize
388KB

Download
memory/1424-62-0x0000000000520000-0x000000000052E000-memory.dmp

Filesize
56KB

Download
memory/1424-13-0x0000000004280000-0x00000000042E1000-memory.dmp

Filesize
388KB

Download
memory/1424-11-0x0000000000150000-0x0000000000151000-memory.dmp

Filesize
4KB

Download
memory/1424-10-0x000000006BEC0000-0x000000006C5AE000-memory.dmp

Filesize
6.9MB

Download
memory/1424-7-0x0000000000000000-mapping.dmp

Download
memory/1476-73-0x0000000000000000-mapping.dmp

Download
memory/1996-68-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/1996-69-0x000000000041D0C0-mapping.dmp

Download

pid	process
1424	vbc.exe
1516	vbc.exe
316	vbc.exe
1064	vbc.exe
1628	vbc.exe
1996	vbc.exe