formbook | 836390a3bb832e2b10fb7bf5ee0d88e7aa32179839e65b933ff2da2aabce8f89

General

Target

Companyprofile_Order_384658353.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

C2

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

resource	yara_rule
behavioral1/memory/1324-18-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral1/memory/1324-19-0x000000000041D0C0-mapping.dmp	xloader
behavioral1/memory/1788-22-0x0000000000000000-mapping.dmp	xloader

Blocklisted process makes network request 1 IoCs

flow	pid	Process
5	1960	EQNEDT32.EXE

Executes dropped EXE 2 IoCs

pid	Process
560	vbc.exe
1324	vbc.exe

Loads dropped DLL 4 IoCs

pid	Process
1960	EQNEDT32.EXE
1960	EQNEDT32.EXE
1960	EQNEDT32.EXE
1960	EQNEDT32.EXE

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 560 set thread context of 1324	560	vbc.exe	34
PID 1324 set thread context of 1256	1324	vbc.exe	14
PID 1788 set thread context of 1256	1788	wuapp.exe	14

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

T1012

System Information Discovery

T1082

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

pid	Process
1960	EQNEDT32.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
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
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
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
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
740	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
560	vbc.exe
560	vbc.exe
1324	vbc.exe
1324	vbc.exe
1788	wuapp.exe
1788	wuapp.exe
1788	wuapp.exe
1788	wuapp.exe
1788	wuapp.exe
1788	wuapp.exe
1788	wuapp.exe
1788	wuapp.exe
1788	wuapp.exe
1788	wuapp.exe
1788	wuapp.exe
1788	wuapp.exe
1788	wuapp.exe
1788	wuapp.exe
1788	wuapp.exe
1788	wuapp.exe
1788	wuapp.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
1324	vbc.exe
1324	vbc.exe
1324	vbc.exe
1788	wuapp.exe
1788	wuapp.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	560	vbc.exe
Token: SeDebugPrivilege	1324	vbc.exe
Token: SeDebugPrivilege	1788	wuapp.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
740	EXCEL.EXE
740	EXCEL.EXE
740	EXCEL.EXE

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 1960 wrote to memory of 560	1960	EQNEDT32.EXE	32
PID 1960 wrote to memory of 560	1960	EQNEDT32.EXE	32
PID 1960 wrote to memory of 560	1960	EQNEDT32.EXE	32
PID 1960 wrote to memory of 560	1960	EQNEDT32.EXE	32
PID 560 wrote to memory of 1324	560	vbc.exe	34
PID 560 wrote to memory of 1324	560	vbc.exe	34
PID 560 wrote to memory of 1324	560	vbc.exe	34
PID 560 wrote to memory of 1324	560	vbc.exe	34
PID 560 wrote to memory of 1324	560	vbc.exe	34
PID 560 wrote to memory of 1324	560	vbc.exe	34
PID 560 wrote to memory of 1324	560	vbc.exe	34
PID 1256 wrote to memory of 1788	1256	Explorer.EXE	35
PID 1256 wrote to memory of 1788	1256	Explorer.EXE	35
PID 1256 wrote to memory of 1788	1256	Explorer.EXE	35
PID 1256 wrote to memory of 1788	1256	Explorer.EXE	35
PID 1256 wrote to memory of 1788	1256	Explorer.EXE	35
PID 1256 wrote to memory of 1788	1256	Explorer.EXE	35
PID 1256 wrote to memory of 1788	1256	Explorer.EXE	35
PID 1788 wrote to memory of 1328	1788	wuapp.exe	36
PID 1788 wrote to memory of 1328	1788	wuapp.exe	36
PID 1788 wrote to memory of 1328	1788	wuapp.exe	36
PID 1788 wrote to memory of 1328	1788	wuapp.exe	36

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1256
- 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\Companyprofile_Order_384658353.xlsx
  2⤵
  - Enumerates system info in registry
  - Modifies Internet Explorer settings
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious use of SetWindowsHookEx
  PID:740
- 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:1788
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Public\vbc.exe"
    3⤵
    PID:1328

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: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:560
- - 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:1324

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

memory/560-10-0x000000006C560000-0x000000006CC4E000-memory.dmp

Filesize
6.9MB

Download
memory/560-11-0x00000000008F0000-0x00000000008F1000-memory.dmp

Filesize
4KB

Download
memory/560-13-0x0000000000880000-0x00000000008E1000-memory.dmp

Filesize
388KB

Download
memory/560-16-0x0000000000640000-0x000000000064E000-memory.dmp

Filesize
56KB

Download
memory/560-17-0x0000000005190000-0x00000000051F1000-memory.dmp

Filesize
388KB

Download
memory/1220-2-0x000007FEF7E50000-0x000007FEF80CA000-memory.dmp

Filesize
2.5MB

Download
memory/1324-18-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/1788-23-0x0000000000C90000-0x0000000000C9B000-memory.dmp

Filesize
44KB

Download
memory/1788-25-0x00000000042E0000-0x0000000004463000-memory.dmp

Filesize
1.5MB

Download

Analysis

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