nloader | e039822594278b0b37f3ceaa936cecc416197925407c13389b1d01b8be5a741b

General

Target

subscription_1618420095.xlsb

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	472	1056	cmd.exe	24

Nloader Payload 4 IoCs

resource	yara_rule
behavioral3/memory/916-70-0x0000000000240000-0x0000000000249000-memory.dmp	nloader
behavioral3/memory/916-73-0x0000000001AB0000-0x0000000001AB7000-memory.dmp	nloader
behavioral3/memory/916-76-0x0000000001AD0000-0x0000000001AD5000-memory.dmp	nloader
behavioral3/memory/916-78-0x0000000000220000-0x0000000000226000-memory.dmp	nloader

Blocklisted process makes network request 1 IoCs

flow	pid	Process
5	916	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
916	rundll32.exe

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 (int)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\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-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\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-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1056	EXCEL.EXE

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1056	EXCEL.EXE
1056	EXCEL.EXE
1056	EXCEL.EXE

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1056 wrote to memory of 472	1056	EXCEL.EXE	30
PID 1056 wrote to memory of 472	1056	EXCEL.EXE	30
PID 1056 wrote to memory of 472	1056	EXCEL.EXE	30
PID 1056 wrote to memory of 472	1056	EXCEL.EXE	30
PID 472 wrote to memory of 580	472	cmd.exe	32
PID 472 wrote to memory of 580	472	cmd.exe	32
PID 472 wrote to memory of 580	472	cmd.exe	32
PID 472 wrote to memory of 580	472	cmd.exe	32
PID 472 wrote to memory of 916	472	cmd.exe	33
PID 472 wrote to memory of 916	472	cmd.exe	33
PID 472 wrote to memory of 916	472	cmd.exe	33
PID 472 wrote to memory of 916	472	cmd.exe	33
PID 472 wrote to memory of 916	472	cmd.exe	33
PID 472 wrote to memory of 916	472	cmd.exe	33
PID 472 wrote to memory of 916	472	cmd.exe	33

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\subscription_1618420095.xlsb
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1056
- 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:472
- - C:\Windows\SysWOW64\certutil.exe
    certutil -decode C:\Users\Public\130486.dot C:\Users\Public\130486.pgj
    3⤵
    PID:580
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32 C:\Users\Public\130486.pgj,DF1
    3⤵
    - Blocklisted process makes network request
    - Loads dropped DLL
    PID:916

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

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Downloads

memory/580-64-0x00000000766D1000-0x00000000766D3000-memory.dmp

Filesize
8KB

Download
memory/916-70-0x0000000000240000-0x0000000000249000-memory.dmp

Filesize
36KB

Download
memory/916-73-0x0000000001AB0000-0x0000000001AB7000-memory.dmp

Filesize
28KB

Download
memory/916-75-0x0000000001AB3000-0x0000000001AB4000-memory.dmp

Filesize
4KB

Download
memory/916-76-0x0000000001AD0000-0x0000000001AD5000-memory.dmp

Filesize
20KB

Download
memory/916-78-0x0000000000220000-0x0000000000226000-memory.dmp

Filesize
24KB

Download
memory/1056-59-0x000000002F6C1000-0x000000002F6C4000-memory.dmp

Filesize
12KB

Download
memory/1056-61-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1056-60-0x0000000071701000-0x0000000071703000-memory.dmp

Filesize
8KB

Download
memory/1056-79-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download

Analysis

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