formbook | e7657932eab205aa1e946f41120b31ef481b7ed87c225b215104c22f69a97841

General

Target

BSL 01321 PYT.xlsx
Size

1.2MB
MD5

d3d8e84318aa37f8ddfb091d1f6fd3a1
SHA1

813965f6dd16278e8ab4b86ff3389bb06c8bbfc8
SHA256

e7657932eab205aa1e946f41120b31ef481b7ed87c225b215104c22f69a97841
SHA512

0a8102559b28bf6e92092b4f73579da19794ab8de97694506feb7e5d43349f379b3af05aeec8518b9217fa52f316599459114497c4af8f4f19aded5386428cce

Score

10^/10

formbook xloader loader rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

C2

http://www.stonescapes1.com/de92/

Decoy

zindaginews.com

tyelevator.com

schustermaninterests.com

algemixdelchef.com

doubscollectivites.com

e-butchery.com

hellbentmask.com

jumbpprivacy.com

teeniestiedye.com

playfulartwork.com

desertvacahs.com

w5470-hed.net

nepalearningpods.com

smoothandsleek.com

thecannaglow.com

torrentkittyla.com

industrytoyou.com

raquelvargas.net

rlc-nc.net

cryptoprises.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/1652-15-0x0000000000400000-0x0000000000428000-memory.dmp	xloader
behavioral1/memory/1652-16-0x000000000041D010-mapping.dmp	xloader
behavioral1/memory/840-18-0x0000000000000000-mapping.dmp	xloader

Blocklisted process makes network request 1 IoCs

Processes:

EQNEDT32.EXE

flow pid process

6 1052 EQNEDT32.EXE
Executes dropped EXE 2 IoCs

Processes:

vbc.exevbc.exe

pid process

456 vbc.exe
1652 vbc.exe
Loads dropped DLL 4 IoCs

Processes:

EQNEDT32.EXE

pid process

1052 EQNEDT32.EXE
1052 EQNEDT32.EXE
1052 EQNEDT32.EXE
1052 EQNEDT32.EXE
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

flow	pid	process
6	1052	EQNEDT32.EXE

pid	process
456	vbc.exe
1652	vbc.exe

pid	process
1052	EQNEDT32.EXE
1052	EQNEDT32.EXE
1052	EQNEDT32.EXE
1052	EQNEDT32.EXE

Suspicious use of SetThreadContext 3 IoCs

Processes:

vbc.exevbc.exeNAPSTAT.EXE

description	pid	process	target process
PID 456 set thread context of 1652	456	vbc.exe	vbc.exe
PID 1652 set thread context of 1248	1652	vbc.exe	Explorer.EXE
PID 840 set thread context of 1248	840	NAPSTAT.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

1052 EQNEDT32.EXE

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

pid	process
1052	EQNEDT32.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

Processes:

EXCEL.EXE

description	ioc	process
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
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt	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 (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\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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

596 EXCEL.EXE

pid	process
596	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 22 IoCs

Processes:

vbc.exeNAPSTAT.EXE

pid	process
1652	vbc.exe
1652	vbc.exe
840	NAPSTAT.EXE
840	NAPSTAT.EXE
840	NAPSTAT.EXE
840	NAPSTAT.EXE
840	NAPSTAT.EXE
840	NAPSTAT.EXE
840	NAPSTAT.EXE
840	NAPSTAT.EXE
840	NAPSTAT.EXE
840	NAPSTAT.EXE
840	NAPSTAT.EXE
840	NAPSTAT.EXE
840	NAPSTAT.EXE
840	NAPSTAT.EXE
840	NAPSTAT.EXE
840	NAPSTAT.EXE
840	NAPSTAT.EXE
840	NAPSTAT.EXE
840	NAPSTAT.EXE
840	NAPSTAT.EXE

Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

vbc.exeNAPSTAT.EXE

pid process

1652 vbc.exe
1652 vbc.exe
1652 vbc.exe
840 NAPSTAT.EXE
840 NAPSTAT.EXE
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

vbc.exeNAPSTAT.EXE

description pid process

Token: SeDebugPrivilege 1652 vbc.exe
Token: SeDebugPrivilege 840 NAPSTAT.EXE
Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

Explorer.EXE

pid process

1248 Explorer.EXE
1248 Explorer.EXE
1248 Explorer.EXE
1248 Explorer.EXE
Suspicious use of SendNotifyMessage 4 IoCs

Processes:

Explorer.EXE

pid process

1248 Explorer.EXE
1248 Explorer.EXE
1248 Explorer.EXE
1248 Explorer.EXE
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

596 EXCEL.EXE
596 EXCEL.EXE
596 EXCEL.EXE

description	pid	process
Token: SeDebugPrivilege	1652	vbc.exe
Token: SeDebugPrivilege	840	NAPSTAT.EXE

pid	process
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE

pid	process
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE

pid	process
596	EXCEL.EXE
596	EXCEL.EXE
596	EXCEL.EXE

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

EQNEDT32.EXEvbc.exeExplorer.EXENAPSTAT.EXE

description	pid	process	target process
PID 1052 wrote to memory of 456	1052	EQNEDT32.EXE	vbc.exe
PID 1052 wrote to memory of 456	1052	EQNEDT32.EXE	vbc.exe
PID 1052 wrote to memory of 456	1052	EQNEDT32.EXE	vbc.exe
PID 1052 wrote to memory of 456	1052	EQNEDT32.EXE	vbc.exe
PID 456 wrote to memory of 1652	456	vbc.exe	vbc.exe
PID 456 wrote to memory of 1652	456	vbc.exe	vbc.exe
PID 456 wrote to memory of 1652	456	vbc.exe	vbc.exe
PID 456 wrote to memory of 1652	456	vbc.exe	vbc.exe
PID 456 wrote to memory of 1652	456	vbc.exe	vbc.exe
PID 456 wrote to memory of 1652	456	vbc.exe	vbc.exe
PID 456 wrote to memory of 1652	456	vbc.exe	vbc.exe
PID 1248 wrote to memory of 840	1248	Explorer.EXE	NAPSTAT.EXE
PID 1248 wrote to memory of 840	1248	Explorer.EXE	NAPSTAT.EXE
PID 1248 wrote to memory of 840	1248	Explorer.EXE	NAPSTAT.EXE
PID 1248 wrote to memory of 840	1248	Explorer.EXE	NAPSTAT.EXE
PID 840 wrote to memory of 1648	840	NAPSTAT.EXE	cmd.exe
PID 840 wrote to memory of 1648	840	NAPSTAT.EXE	cmd.exe
PID 840 wrote to memory of 1648	840	NAPSTAT.EXE	cmd.exe
PID 840 wrote to memory of 1648	840	NAPSTAT.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:1248
- 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\BSL 01321 PYT.xlsx"
  2⤵
  - Enumerates system info in registry
  - Modifies Internet Explorer settings
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious use of SetWindowsHookEx
  PID:596
- C:\Windows\SysWOW64\NAPSTAT.EXE
  "C:\Windows\SysWOW64\NAPSTAT.EXE"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:840
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Public\vbc.exe"
    3⤵
    PID:1648

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:1052
- C:\Users\Public\vbc.exe
  "C:\Users\Public\vbc.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:456
- - 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:1652

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
404e118191842e0697f2c29b98330d65

SHA1
07c0de4ad963fbd367b61fe5a1764d1242701ced

SHA256
985306a8b7a5cb0604af6bbbddea16f334b17bcec4c5477bdfdb0330ed66b674

SHA512
1da5f922d37f111f0be07556635068be757e3e164b502ab630f3ccfa4f3df48895decab0f95c1be7c2ebb3dc8bc68805af7765ca5f5b8fc986d1db93aa1e29f6

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

MD5
404e118191842e0697f2c29b98330d65

SHA1
07c0de4ad963fbd367b61fe5a1764d1242701ced

SHA256
985306a8b7a5cb0604af6bbbddea16f334b17bcec4c5477bdfdb0330ed66b674

SHA512
1da5f922d37f111f0be07556635068be757e3e164b502ab630f3ccfa4f3df48895decab0f95c1be7c2ebb3dc8bc68805af7765ca5f5b8fc986d1db93aa1e29f6

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

MD5
404e118191842e0697f2c29b98330d65

SHA1
07c0de4ad963fbd367b61fe5a1764d1242701ced

SHA256
985306a8b7a5cb0604af6bbbddea16f334b17bcec4c5477bdfdb0330ed66b674

SHA512
1da5f922d37f111f0be07556635068be757e3e164b502ab630f3ccfa4f3df48895decab0f95c1be7c2ebb3dc8bc68805af7765ca5f5b8fc986d1db93aa1e29f6

Download Submit
\Users\Public\vbc.exe

MD5
404e118191842e0697f2c29b98330d65

SHA1
07c0de4ad963fbd367b61fe5a1764d1242701ced

SHA256
985306a8b7a5cb0604af6bbbddea16f334b17bcec4c5477bdfdb0330ed66b674

SHA512
1da5f922d37f111f0be07556635068be757e3e164b502ab630f3ccfa4f3df48895decab0f95c1be7c2ebb3dc8bc68805af7765ca5f5b8fc986d1db93aa1e29f6

Download Submit
\Users\Public\vbc.exe

MD5
404e118191842e0697f2c29b98330d65

SHA1
07c0de4ad963fbd367b61fe5a1764d1242701ced

SHA256
985306a8b7a5cb0604af6bbbddea16f334b17bcec4c5477bdfdb0330ed66b674

SHA512
1da5f922d37f111f0be07556635068be757e3e164b502ab630f3ccfa4f3df48895decab0f95c1be7c2ebb3dc8bc68805af7765ca5f5b8fc986d1db93aa1e29f6

Download Submit
\Users\Public\vbc.exe

MD5
404e118191842e0697f2c29b98330d65

SHA1
07c0de4ad963fbd367b61fe5a1764d1242701ced

SHA256
985306a8b7a5cb0604af6bbbddea16f334b17bcec4c5477bdfdb0330ed66b674

SHA512
1da5f922d37f111f0be07556635068be757e3e164b502ab630f3ccfa4f3df48895decab0f95c1be7c2ebb3dc8bc68805af7765ca5f5b8fc986d1db93aa1e29f6

Download Submit
\Users\Public\vbc.exe

MD5
404e118191842e0697f2c29b98330d65

SHA1
07c0de4ad963fbd367b61fe5a1764d1242701ced

SHA256
985306a8b7a5cb0604af6bbbddea16f334b17bcec4c5477bdfdb0330ed66b674

SHA512
1da5f922d37f111f0be07556635068be757e3e164b502ab630f3ccfa4f3df48895decab0f95c1be7c2ebb3dc8bc68805af7765ca5f5b8fc986d1db93aa1e29f6

Download Submit
memory/456-10-0x000000006B7F0000-0x000000006BEDE000-memory.dmp

Filesize
6.9MB

Download
memory/456-11-0x0000000000CC0000-0x0000000000CC1000-memory.dmp

Filesize
4KB

Download
memory/456-13-0x0000000000350000-0x000000000035E000-memory.dmp

Filesize
56KB

Download
memory/456-14-0x0000000000420000-0x00000000004A3000-memory.dmp

Filesize
524KB

Download
memory/456-7-0x0000000000000000-mapping.dmp

Download
memory/840-18-0x0000000000000000-mapping.dmp

Download
memory/840-19-0x0000000000E10000-0x0000000000E56000-memory.dmp

Filesize
280KB

Download
memory/840-21-0x00000000049A0000-0x0000000004B25000-memory.dmp

Filesize
1.5MB

Download
memory/1368-2-0x000007FEF6010000-0x000007FEF628A000-memory.dmp

Filesize
2.5MB

Download
memory/1648-20-0x0000000000000000-mapping.dmp

Download
memory/1652-15-0x0000000000400000-0x0000000000428000-memory.dmp

Filesize
160KB

Download
memory/1652-16-0x000000000041D010-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads