formbook | 185f57d1f0ef4addee6ba740f0439d0d8023d60588d5e7412c0af7c177a1ae21

General

Target

Doc_74657456348374.xlsx
Size

1.9MB
MD5

13bafa262ca4ed3538288d5f86d2ba1c
SHA1

a5a883022720a69e6d31a52995d364c2da660478
SHA256

185f57d1f0ef4addee6ba740f0439d0d8023d60588d5e7412c0af7c177a1ae21
SHA512

62d1c529e438859c9c6a8f44ce7a350ed95ce305c8d687a6f669698a62d7da6917728f92452fd156b1ed0d8e1c490cdb038816737dc10cbffa5e9e3efb7e3f7b

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

Processes:

resource	yara_rule
behavioral1/memory/1748-18-0x000000000041D0C0-mapping.dmp	xloader
behavioral1/memory/1748-17-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral1/memory/1572-19-0x0000000000000000-mapping.dmp	xloader

Blocklisted process makes network request 1 IoCs

Processes:

EQNEDT32.EXE

flow pid process

6 1976 EQNEDT32.EXE
Executes dropped EXE 1 IoCs

Processes:

vbc.exe

pid process

1536 vbc.exe
Loads dropped DLL 4 IoCs

Processes:

EQNEDT32.EXE

pid process

1976 EQNEDT32.EXE
1976 EQNEDT32.EXE
1976 EQNEDT32.EXE
1976 EQNEDT32.EXE
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

flow	pid	process
6	1976	EQNEDT32.EXE

pid	process
1976	EQNEDT32.EXE
1976	EQNEDT32.EXE
1976	EQNEDT32.EXE
1976	EQNEDT32.EXE

Suspicious use of SetThreadContext 3 IoCs

Processes:

vbc.exevbc.execontrol.exe

description	pid	process	target process
PID 1536 set thread context of 1748	1536	vbc.exe	vbc.exe
PID 1748 set thread context of 1260	1748	vbc.exe	Explorer.EXE
PID 1572 set thread context of 1260	1572	control.exe	Explorer.EXE

Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

1096 schtasks.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

1976 EQNEDT32.EXE

pid	process
1096	schtasks.exe

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

pid	process
1976	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\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	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 (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
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\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
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 (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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1936 EXCEL.EXE

pid	process
1936	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 23 IoCs

Processes:

vbc.exevbc.execontrol.exe

pid	process
1536	vbc.exe
1748	vbc.exe
1748	vbc.exe
1572	control.exe
1572	control.exe
1572	control.exe
1572	control.exe
1572	control.exe
1572	control.exe
1572	control.exe
1572	control.exe
1572	control.exe
1572	control.exe
1572	control.exe
1572	control.exe
1572	control.exe
1572	control.exe
1572	control.exe
1572	control.exe
1572	control.exe
1572	control.exe
1572	control.exe
1572	control.exe

Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

vbc.execontrol.exe

pid process

1748 vbc.exe
1748 vbc.exe
1748 vbc.exe
1572 control.exe
1572 control.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vbc.exevbc.execontrol.exe

description pid process

Token: SeDebugPrivilege 1536 vbc.exe
Token: SeDebugPrivilege 1748 vbc.exe
Token: SeDebugPrivilege 1572 control.exe
Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

Explorer.EXE

pid process

1260 Explorer.EXE
1260 Explorer.EXE
1260 Explorer.EXE
1260 Explorer.EXE
Suspicious use of SendNotifyMessage 4 IoCs

Processes:

Explorer.EXE

pid process

1260 Explorer.EXE
1260 Explorer.EXE
1260 Explorer.EXE
1260 Explorer.EXE
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

1936 EXCEL.EXE
1936 EXCEL.EXE
1936 EXCEL.EXE

pid	process
1748	vbc.exe
1748	vbc.exe
1748	vbc.exe
1572	control.exe
1572	control.exe

description	pid	process
Token: SeDebugPrivilege	1536	vbc.exe
Token: SeDebugPrivilege	1748	vbc.exe
Token: SeDebugPrivilege	1572	control.exe

pid	process
1260	Explorer.EXE
1260	Explorer.EXE
1260	Explorer.EXE
1260	Explorer.EXE

pid	process
1260	Explorer.EXE
1260	Explorer.EXE
1260	Explorer.EXE
1260	Explorer.EXE

pid	process
1936	EXCEL.EXE
1936	EXCEL.EXE
1936	EXCEL.EXE

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

EQNEDT32.EXEvbc.exeExplorer.EXEcontrol.exe

description	pid	process	target process
PID 1976 wrote to memory of 1536	1976	EQNEDT32.EXE	vbc.exe
PID 1976 wrote to memory of 1536	1976	EQNEDT32.EXE	vbc.exe
PID 1976 wrote to memory of 1536	1976	EQNEDT32.EXE	vbc.exe
PID 1976 wrote to memory of 1536	1976	EQNEDT32.EXE	vbc.exe
PID 1536 wrote to memory of 1096	1536	vbc.exe	schtasks.exe
PID 1536 wrote to memory of 1096	1536	vbc.exe	schtasks.exe
PID 1536 wrote to memory of 1096	1536	vbc.exe	schtasks.exe
PID 1536 wrote to memory of 1096	1536	vbc.exe	schtasks.exe
PID 1536 wrote to memory of 1748	1536	vbc.exe	vbc.exe
PID 1536 wrote to memory of 1748	1536	vbc.exe	vbc.exe
PID 1536 wrote to memory of 1748	1536	vbc.exe	vbc.exe
PID 1536 wrote to memory of 1748	1536	vbc.exe	vbc.exe
PID 1536 wrote to memory of 1748	1536	vbc.exe	vbc.exe
PID 1536 wrote to memory of 1748	1536	vbc.exe	vbc.exe
PID 1536 wrote to memory of 1748	1536	vbc.exe	vbc.exe
PID 1260 wrote to memory of 1572	1260	Explorer.EXE	control.exe
PID 1260 wrote to memory of 1572	1260	Explorer.EXE	control.exe
PID 1260 wrote to memory of 1572	1260	Explorer.EXE	control.exe
PID 1260 wrote to memory of 1572	1260	Explorer.EXE	control.exe
PID 1572 wrote to memory of 1436	1572	control.exe	cmd.exe
PID 1572 wrote to memory of 1436	1572	control.exe	cmd.exe
PID 1572 wrote to memory of 1436	1572	control.exe	cmd.exe
PID 1572 wrote to memory of 1436	1572	control.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1260

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\Doc_74657456348374.xlsx
2⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:1936

C:\Windows\SysWOW64\control.exe
"C:\Windows\SysWOW64\control.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1572

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
3⤵
PID:1436

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:1976

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:1536

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\EjZzLtS" /XML "C:\Users\Admin\AppData\Local\Temp\tmpAC27.tmp"
3⤵
- Creates scheduled task(s)
PID:1096

C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
"{path}"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1748

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Exploitation for Client Execution

Scheduled Task

Scripting

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmpAC27.tmp
MD5
841f9f2fa723a6c911bb864f682ae3af

SHA1
1a8eb255827910ce795309216dc9ce1e0b9cd499

SHA256
6f0336e4d938965516b9e70cdd78386d8f43ed2c68dabc2d1deacc7eeabba5b7

SHA512
7c7e5918f9eea04edaa672f5b0272f55375bf342390cf7eb2807ec595d804171bab3b6866e6f20f86f8c4a5b266f2b5dea87887b55ff2ab545fea512db09c6ba

Download Submit
C:\Users\Public\vbc.exe
MD5
61b73554fb05d79c58046660462acda8

SHA1
a5972374dc0e9377e6b1badeed0a4235d3f43ab0

SHA256
d28c56accd73a0c2d4c5a62a288ae12af64ee719ac6060ef2c7ea9be3c5d400f

SHA512
6b5f69f1d8acaebbc93c98f8364bd15028031ebe3e41d8d1372b00b1647320af9718b4a4c9a632423e1387d7299d52e30c2657b0b617be53953675bbdf0247ad

Download Submit
C:\Users\Public\vbc.exe
MD5
61b73554fb05d79c58046660462acda8

SHA1
a5972374dc0e9377e6b1badeed0a4235d3f43ab0

SHA256
d28c56accd73a0c2d4c5a62a288ae12af64ee719ac6060ef2c7ea9be3c5d400f

SHA512
6b5f69f1d8acaebbc93c98f8364bd15028031ebe3e41d8d1372b00b1647320af9718b4a4c9a632423e1387d7299d52e30c2657b0b617be53953675bbdf0247ad

Download Submit
\Users\Public\vbc.exe
MD5
61b73554fb05d79c58046660462acda8

SHA1
a5972374dc0e9377e6b1badeed0a4235d3f43ab0

SHA256
d28c56accd73a0c2d4c5a62a288ae12af64ee719ac6060ef2c7ea9be3c5d400f

SHA512
6b5f69f1d8acaebbc93c98f8364bd15028031ebe3e41d8d1372b00b1647320af9718b4a4c9a632423e1387d7299d52e30c2657b0b617be53953675bbdf0247ad

Download Submit
\Users\Public\vbc.exe
MD5
61b73554fb05d79c58046660462acda8

SHA1
a5972374dc0e9377e6b1badeed0a4235d3f43ab0

SHA256
d28c56accd73a0c2d4c5a62a288ae12af64ee719ac6060ef2c7ea9be3c5d400f

SHA512
6b5f69f1d8acaebbc93c98f8364bd15028031ebe3e41d8d1372b00b1647320af9718b4a4c9a632423e1387d7299d52e30c2657b0b617be53953675bbdf0247ad

Download Submit
\Users\Public\vbc.exe
MD5
61b73554fb05d79c58046660462acda8

SHA1
a5972374dc0e9377e6b1badeed0a4235d3f43ab0

SHA256
d28c56accd73a0c2d4c5a62a288ae12af64ee719ac6060ef2c7ea9be3c5d400f

SHA512
6b5f69f1d8acaebbc93c98f8364bd15028031ebe3e41d8d1372b00b1647320af9718b4a4c9a632423e1387d7299d52e30c2657b0b617be53953675bbdf0247ad

Download Submit
\Users\Public\vbc.exe
MD5
61b73554fb05d79c58046660462acda8

SHA1
a5972374dc0e9377e6b1badeed0a4235d3f43ab0

SHA256
d28c56accd73a0c2d4c5a62a288ae12af64ee719ac6060ef2c7ea9be3c5d400f

SHA512
6b5f69f1d8acaebbc93c98f8364bd15028031ebe3e41d8d1372b00b1647320af9718b4a4c9a632423e1387d7299d52e30c2657b0b617be53953675bbdf0247ad

Download Submit
memory/1096-15-0x0000000000000000-mapping.dmp

Download
memory/1436-21-0x0000000000000000-mapping.dmp

Download
memory/1536-13-0x0000000000520000-0x000000000052E000-memory.dmp

Filesize
56KB

Download
memory/1536-14-0x0000000005650000-0x00000000056DD000-memory.dmp

Filesize
564KB

Download
memory/1536-11-0x0000000000880000-0x0000000000881000-memory.dmp

Filesize
4KB

Download
memory/1536-10-0x000000006BD20000-0x000000006C40E000-memory.dmp

Filesize
6.9MB

Download
memory/1536-7-0x0000000000000000-mapping.dmp

Download
memory/1572-19-0x0000000000000000-mapping.dmp

Download
memory/1572-20-0x0000000000940000-0x000000000095F000-memory.dmp

Filesize
124KB

Download
memory/1572-22-0x0000000004B10000-0x0000000004BE1000-memory.dmp

Filesize
836KB

Download
memory/1572-23-0x0000000004B10000-0x0000000004BE1000-memory.dmp

Filesize
836KB

Download
memory/1680-2-0x000007FEF5BC0000-0x000007FEF5E3A000-memory.dmp

Filesize
2.5MB

Download
memory/1748-18-0x000000000041D0C0-mapping.dmp

Download
memory/1748-17-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads