formbook | 0f2085a88aae9e44e3771ddde9c7b1337f25e21416feb4341ffed1a47ccfdf2f

General

Target

13-01-21.xlsx
Size

1.6MB
MD5

43754a8d050bfb5fa1235a90bd89782b
SHA1

8d52c8b3cdb59b6ccd983b3cff5131ad59929bfc
SHA256

0f2085a88aae9e44e3771ddde9c7b1337f25e21416feb4341ffed1a47ccfdf2f
SHA512

f4121f8e40a692c13cc27b60a237b3f53c31d46f532e8fdf721ebf3af4f302a8b149e3cb2b33a4e0d884047b3d565d782bf219e321ef6950fb7cd2dd2426f5c0

Score

10^/10

formbook xloader loader rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

C2

http://www.rizrvd.com/bw82/

Decoy

fundamentaliemef.com

gallerybrows.com

leadeligey.com

octoberx2.online

climaxnovels.com

gdsjgf.com

curateherstories.com

blacksailus.com

yjpps.com

gmobilet.com

fcoins.club

foreverlive2027.com

healthyfifties.com

wmarquezy.com

housebulb.com

thebabyfriendly.com

primajayaintiperkasa.com

learnplaychess.com

chrisbubser.digital

xn--avenr-wsa.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/1696-15-0x0000000000400000-0x0000000000428000-memory.dmp	xloader
behavioral1/memory/1696-16-0x000000000041CFF0-mapping.dmp	xloader
behavioral1/memory/1940-19-0x0000000000000000-mapping.dmp	xloader

Blocklisted process makes network request 1 IoCs

Processes:

EQNEDT32.EXE

flow pid process

5 1160 EQNEDT32.EXE
Executes dropped EXE 2 IoCs

Processes:

vbc.exevbc.exe

pid process

772 vbc.exe
1696 vbc.exe
Loads dropped DLL 4 IoCs

Processes:

EQNEDT32.EXE

pid process

1160 EQNEDT32.EXE
1160 EQNEDT32.EXE
1160 EQNEDT32.EXE
1160 EQNEDT32.EXE
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

flow	pid	process
5	1160	EQNEDT32.EXE

pid	process
772	vbc.exe
1696	vbc.exe

pid	process
1160	EQNEDT32.EXE
1160	EQNEDT32.EXE
1160	EQNEDT32.EXE
1160	EQNEDT32.EXE

Suspicious use of SetThreadContext 4 IoCs

Processes:

vbc.exevbc.exeraserver.exe

description	pid	process	target process
PID 772 set thread context of 1696	772	vbc.exe	vbc.exe
PID 1696 set thread context of 1244	1696	vbc.exe	Explorer.EXE
PID 1696 set thread context of 1244	1696	vbc.exe	Explorer.EXE
PID 1940 set thread context of 1244	1940	raserver.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

1160 EQNEDT32.EXE

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

pid	process
1160	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-1-5-21-3825035466-2522850611-591511364-1000\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
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
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
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
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

848 EXCEL.EXE

pid	process
848	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 18 IoCs

Processes:

vbc.exeraserver.exe

pid	process
1696	vbc.exe
1696	vbc.exe
1696	vbc.exe
1940	raserver.exe
1940	raserver.exe
1940	raserver.exe
1940	raserver.exe
1940	raserver.exe
1940	raserver.exe
1940	raserver.exe
1940	raserver.exe
1940	raserver.exe
1940	raserver.exe
1940	raserver.exe
1940	raserver.exe
1940	raserver.exe
1940	raserver.exe
1940	raserver.exe

Suspicious behavior: MapViewOfSection 6 IoCs

Processes:

vbc.exeraserver.exe

pid process

1696 vbc.exe
1696 vbc.exe
1696 vbc.exe
1696 vbc.exe
1940 raserver.exe
1940 raserver.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vbc.exeraserver.exeExplorer.EXE

description pid process

Token: SeDebugPrivilege 1696 vbc.exe
Token: SeDebugPrivilege 1940 raserver.exe
Token: SeShutdownPrivilege 1244 Explorer.EXE
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

848 EXCEL.EXE
848 EXCEL.EXE
848 EXCEL.EXE

description	pid	process
Token: SeDebugPrivilege	1696	vbc.exe
Token: SeDebugPrivilege	1940	raserver.exe
Token: SeShutdownPrivilege	1244	Explorer.EXE

pid	process
848	EXCEL.EXE
848	EXCEL.EXE
848	EXCEL.EXE

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

EQNEDT32.EXEvbc.exeExplorer.EXEraserver.exe

description	pid	process	target process
PID 1160 wrote to memory of 772	1160	EQNEDT32.EXE	vbc.exe
PID 1160 wrote to memory of 772	1160	EQNEDT32.EXE	vbc.exe
PID 1160 wrote to memory of 772	1160	EQNEDT32.EXE	vbc.exe
PID 1160 wrote to memory of 772	1160	EQNEDT32.EXE	vbc.exe
PID 772 wrote to memory of 1696	772	vbc.exe	vbc.exe
PID 772 wrote to memory of 1696	772	vbc.exe	vbc.exe
PID 772 wrote to memory of 1696	772	vbc.exe	vbc.exe
PID 772 wrote to memory of 1696	772	vbc.exe	vbc.exe
PID 772 wrote to memory of 1696	772	vbc.exe	vbc.exe
PID 772 wrote to memory of 1696	772	vbc.exe	vbc.exe
PID 772 wrote to memory of 1696	772	vbc.exe	vbc.exe
PID 1244 wrote to memory of 1940	1244	Explorer.EXE	raserver.exe
PID 1244 wrote to memory of 1940	1244	Explorer.EXE	raserver.exe
PID 1244 wrote to memory of 1940	1244	Explorer.EXE	raserver.exe
PID 1244 wrote to memory of 1940	1244	Explorer.EXE	raserver.exe
PID 1940 wrote to memory of 1732	1940	raserver.exe	cmd.exe
PID 1940 wrote to memory of 1732	1940	raserver.exe	cmd.exe
PID 1940 wrote to memory of 1732	1940	raserver.exe	cmd.exe
PID 1940 wrote to memory of 1732	1940	raserver.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of AdjustPrivilegeToken
- 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\13-01-21.xlsx
  2⤵
  - Enumerates system info in registry
  - Modifies Internet Explorer settings
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious use of SetWindowsHookEx
  PID:848
- C:\Windows\SysWOW64\raserver.exe
  "C:\Windows\SysWOW64\raserver.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1940
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Public\vbc.exe"
    3⤵
    PID:1732

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:1160
- C:\Users\Public\vbc.exe
  "C:\Users\Public\vbc.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:772
- - 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:1696

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

C:\Users\Public\vbc.exe

MD5
d0b2e715c3e584846f591401035609b4

SHA1
7f7a397d28920049e779b52e2de3b110f3e1b41b

SHA256
3579fdebe1647aa6a9172a2d808fa43b66a9ebc0e09aba02e1ed70d74dad67e2

SHA512
076bcaf8dbbf52b4cd3a6275c908e6992dabbfa5f3afbb9ad0cb65fdd48d8a54908ab0aabee3aae1ee9f069482c7cd32aee9b8397caa1f12d6e437b8cf757fbb

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

MD5
d0b2e715c3e584846f591401035609b4

SHA1
7f7a397d28920049e779b52e2de3b110f3e1b41b

SHA256
3579fdebe1647aa6a9172a2d808fa43b66a9ebc0e09aba02e1ed70d74dad67e2

SHA512
076bcaf8dbbf52b4cd3a6275c908e6992dabbfa5f3afbb9ad0cb65fdd48d8a54908ab0aabee3aae1ee9f069482c7cd32aee9b8397caa1f12d6e437b8cf757fbb

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

MD5
d0b2e715c3e584846f591401035609b4

SHA1
7f7a397d28920049e779b52e2de3b110f3e1b41b

SHA256
3579fdebe1647aa6a9172a2d808fa43b66a9ebc0e09aba02e1ed70d74dad67e2

SHA512
076bcaf8dbbf52b4cd3a6275c908e6992dabbfa5f3afbb9ad0cb65fdd48d8a54908ab0aabee3aae1ee9f069482c7cd32aee9b8397caa1f12d6e437b8cf757fbb

Download Submit
\Users\Public\vbc.exe

MD5
d0b2e715c3e584846f591401035609b4

SHA1
7f7a397d28920049e779b52e2de3b110f3e1b41b

SHA256
3579fdebe1647aa6a9172a2d808fa43b66a9ebc0e09aba02e1ed70d74dad67e2

SHA512
076bcaf8dbbf52b4cd3a6275c908e6992dabbfa5f3afbb9ad0cb65fdd48d8a54908ab0aabee3aae1ee9f069482c7cd32aee9b8397caa1f12d6e437b8cf757fbb

Download Submit
\Users\Public\vbc.exe

MD5
d0b2e715c3e584846f591401035609b4

SHA1
7f7a397d28920049e779b52e2de3b110f3e1b41b

SHA256
3579fdebe1647aa6a9172a2d808fa43b66a9ebc0e09aba02e1ed70d74dad67e2

SHA512
076bcaf8dbbf52b4cd3a6275c908e6992dabbfa5f3afbb9ad0cb65fdd48d8a54908ab0aabee3aae1ee9f069482c7cd32aee9b8397caa1f12d6e437b8cf757fbb

Download Submit
\Users\Public\vbc.exe

MD5
d0b2e715c3e584846f591401035609b4

SHA1
7f7a397d28920049e779b52e2de3b110f3e1b41b

SHA256
3579fdebe1647aa6a9172a2d808fa43b66a9ebc0e09aba02e1ed70d74dad67e2

SHA512
076bcaf8dbbf52b4cd3a6275c908e6992dabbfa5f3afbb9ad0cb65fdd48d8a54908ab0aabee3aae1ee9f069482c7cd32aee9b8397caa1f12d6e437b8cf757fbb

Download Submit
\Users\Public\vbc.exe

MD5
d0b2e715c3e584846f591401035609b4

SHA1
7f7a397d28920049e779b52e2de3b110f3e1b41b

SHA256
3579fdebe1647aa6a9172a2d808fa43b66a9ebc0e09aba02e1ed70d74dad67e2

SHA512
076bcaf8dbbf52b4cd3a6275c908e6992dabbfa5f3afbb9ad0cb65fdd48d8a54908ab0aabee3aae1ee9f069482c7cd32aee9b8397caa1f12d6e437b8cf757fbb

Download Submit
memory/772-13-0x00000000004D0000-0x00000000004E2000-memory.dmp

Filesize
72KB

Download
memory/772-10-0x000000006C860000-0x000000006CF4E000-memory.dmp

Filesize
6.9MB

Download
memory/772-11-0x0000000000A30000-0x0000000000A31000-memory.dmp

Filesize
4KB

Download
memory/772-14-0x0000000004B10000-0x0000000004B75000-memory.dmp

Filesize
404KB

Download
memory/772-7-0x0000000000000000-mapping.dmp

Download
memory/1184-2-0x000007FEF6460000-0x000007FEF66DA000-memory.dmp

Filesize
2.5MB

Download
memory/1244-18-0x00000000074B0000-0x0000000007649000-memory.dmp

Filesize
1.6MB

Download
memory/1696-15-0x0000000000400000-0x0000000000428000-memory.dmp

Filesize
160KB

Download
memory/1696-16-0x000000000041CFF0-mapping.dmp

Download
memory/1732-21-0x0000000000000000-mapping.dmp

Download
memory/1940-19-0x0000000000000000-mapping.dmp

Download
memory/1940-20-0x0000000000590000-0x00000000005AC000-memory.dmp

Filesize
112KB

Download
memory/1940-22-0x0000000004250000-0x000000000430C000-memory.dmp

Filesize
752KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads