nloader | 6d6ff6f138defb2bb7602c08c1cb22930f5e30ef264eeaf760f99d4ca95beca7

General

Target

subscription_161.xlsb
Size

269KB
MD5

e86b9229ec1b692dff17c074843d27da
SHA1

61598ee67b6f4f5ac01a5f0752dfe3324d00c66f
SHA256

6d6ff6f138defb2bb7602c08c1cb22930f5e30ef264eeaf760f99d4ca95beca7
SHA512

a8f9105ab7b360c492e0409d1d5b3912eba29fe2175036af676083a145f0a80b5924745d3b64b8ac82f499ac3c16df15c6650f30ea9bb006cca30931984e265b

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	564	1820	cmd.exe	24

Nloader Payload 1 IoCs

resource	yara_rule
behavioral1/memory/1872-71-0x0000000000180000-0x0000000000185000-memory.dmp	nloader

Blocklisted process makes network request 1 IoCs

flow	pid	Process
6	1872	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
1872	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
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 (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
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	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
1820	EXCEL.EXE

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1820	EXCEL.EXE
1820	EXCEL.EXE
1820	EXCEL.EXE

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1820 wrote to memory of 564	1820	EXCEL.EXE	30
PID 1820 wrote to memory of 564	1820	EXCEL.EXE	30
PID 1820 wrote to memory of 564	1820	EXCEL.EXE	30
PID 1820 wrote to memory of 564	1820	EXCEL.EXE	30
PID 564 wrote to memory of 1468	564	cmd.exe	32
PID 564 wrote to memory of 1468	564	cmd.exe	32
PID 564 wrote to memory of 1468	564	cmd.exe	32
PID 564 wrote to memory of 1468	564	cmd.exe	32
PID 564 wrote to memory of 1872	564	cmd.exe	33
PID 564 wrote to memory of 1872	564	cmd.exe	33
PID 564 wrote to memory of 1872	564	cmd.exe	33
PID 564 wrote to memory of 1872	564	cmd.exe	33
PID 564 wrote to memory of 1872	564	cmd.exe	33
PID 564 wrote to memory of 1872	564	cmd.exe	33
PID 564 wrote to memory of 1872	564	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_161.xlsb
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1820
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c certutil -decode %PUBLIC%\496258.dof %PUBLIC%\496258.doh && rundll32 %PUBLIC%\496258.doh,DF1
  2⤵
  - Process spawned unexpected child process
  - Suspicious use of WriteProcessMemory
  PID:564
- - C:\Windows\SysWOW64\certutil.exe
    certutil -decode C:\Users\Public\496258.dof C:\Users\Public\496258.doh
    3⤵
    PID:1468
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32 C:\Users\Public\496258.doh,DF1
    3⤵
    - Blocklisted process makes network request
    - Loads dropped DLL
    PID:1872

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/1468-65-0x0000000076641000-0x0000000076643000-memory.dmp

Filesize
8KB

Download
memory/1820-60-0x000000002FBA1000-0x000000002FBA4000-memory.dmp

Filesize
12KB

Download
memory/1820-61-0x00000000716D1000-0x00000000716D3000-memory.dmp

Filesize
8KB

Download
memory/1820-62-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1872-71-0x0000000000180000-0x0000000000185000-memory.dmp

Filesize
20KB

Download

Analysis

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