nloader | 6c229ae1e0497a93bdc1655fed580e13fc94b300133de8f423984efbe0bc1138

General

Target

Fattura.xlsb
Size

249KB
MD5

cfb756f36616e64f4da99dce90b25661
SHA1

00f48058178e506ad535f7f5c00b632c41ba4b8f
SHA256

051770ec73c6bb36b839af3fcdc2e28e14f8e8c24f77f89bdc034c19f05516ed
SHA512

fce764ec2d370a3709af0a2a8e1eca125e175e3c14849362a9d301b13f631a44d3dbb2289d1cb224f1357aeaa0da42b0d6c54c544d7c226ca6b9d6f5d6a0a9e6

Score

10^/10

nloader loader

Malware Config

Extracted

Language

xlm4.0

Source

Signatures

Nloader
Simple loader that includes the keyword 'campo' in the URL used to download other families.
loader nloader

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

description	pid	pid_target	Process	procid_target
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1188	1632	cmd.exe	24

Nloader Payload 1 IoCs

resource	yara_rule
behavioral1/memory/800-71-0x00000000001D0000-0x00000000001D5000-memory.dmp	nloader

Loads dropped DLL 1 IoCs

pid	Process
800	rundll32.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
632	800	WerFault.exe	33

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

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\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-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\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-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1632	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
632	WerFault.exe
632	WerFault.exe
632	WerFault.exe
632	WerFault.exe
632	WerFault.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	632	WerFault.exe

Suspicious use of SetWindowsHookEx 5 IoCs

pid	Process
1632	EXCEL.EXE
1632	EXCEL.EXE
1632	EXCEL.EXE
1632	EXCEL.EXE
1632	EXCEL.EXE

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1632 wrote to memory of 1188	1632	EXCEL.EXE	30
PID 1632 wrote to memory of 1188	1632	EXCEL.EXE	30
PID 1632 wrote to memory of 1188	1632	EXCEL.EXE	30
PID 1632 wrote to memory of 1188	1632	EXCEL.EXE	30
PID 1188 wrote to memory of 572	1188	cmd.exe	32
PID 1188 wrote to memory of 572	1188	cmd.exe	32
PID 1188 wrote to memory of 572	1188	cmd.exe	32
PID 1188 wrote to memory of 572	1188	cmd.exe	32
PID 1188 wrote to memory of 800	1188	cmd.exe	33
PID 1188 wrote to memory of 800	1188	cmd.exe	33
PID 1188 wrote to memory of 800	1188	cmd.exe	33
PID 1188 wrote to memory of 800	1188	cmd.exe	33
PID 1188 wrote to memory of 800	1188	cmd.exe	33
PID 1188 wrote to memory of 800	1188	cmd.exe	33
PID 1188 wrote to memory of 800	1188	cmd.exe	33
PID 800 wrote to memory of 632	800	rundll32.exe	35
PID 800 wrote to memory of 632	800	rundll32.exe	35
PID 800 wrote to memory of 632	800	rundll32.exe	35
PID 800 wrote to memory of 632	800	rundll32.exe	35

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\Fattura.xlsb
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1632
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c certutil -decode %PUBLIC%\130486.dot %PUBLIC%\130486.pgj && rundll32 %PUBLIC%\130486.pgj,DF1
  2⤵
  - Process spawned unexpected child process
  - Suspicious use of WriteProcessMemory
  PID:1188
- - C:\Windows\SysWOW64\certutil.exe
    certutil -decode C:\Users\Public\130486.dot C:\Users\Public\130486.pgj
    3⤵
    PID:572
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32 C:\Users\Public\130486.pgj,DF1
    3⤵
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:800
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 800 -s 432
      4⤵
      Program crash
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:632

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

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

memory/572-65-0x0000000075551000-0x0000000075553000-memory.dmp

Filesize
8KB

Download
memory/632-73-0x0000000000350000-0x0000000000351000-memory.dmp

Filesize
4KB

Download
memory/800-71-0x00000000001D0000-0x00000000001D5000-memory.dmp

Filesize
20KB

Download
memory/1632-62-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1632-61-0x0000000071831000-0x0000000071833000-memory.dmp

Filesize
8KB

Download
memory/1632-60-0x000000002FF61000-0x000000002FF64000-memory.dmp

Filesize
12KB

Download

Analysis

Sharing