nloader | 522245f192f8a25267d3c07be6cefa5f9ae583f62ac781577c8653f5cf00f7f6

General

Target

subscription_1618344415.xlsb
Size

181KB
MD5

307a6d965c1435b17e3fe2ab03f92d16
SHA1

47965c868c70245f783fcace03271eb287761c51
SHA256

522245f192f8a25267d3c07be6cefa5f9ae583f62ac781577c8653f5cf00f7f6
SHA512

596ea5cd389a298953b9dde78f3d95e0ffcc0e61d5b047f9dc6100adb405d36356e570019b376f0eacd95f397231fe54996a7ca269e9930ff7e395b5cab755ff

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	432	1040	cmd.exe	24

Nloader Payload 1 IoCs

resource	yara_rule
behavioral1/memory/960-71-0x0000000000190000-0x0000000000195000-memory.dmp	nloader

Blocklisted process makes network request 1 IoCs

flow	pid	Process
5	960	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
960	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 (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
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
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 (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\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
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 (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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1040	EXCEL.EXE

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1040	EXCEL.EXE
1040	EXCEL.EXE
1040	EXCEL.EXE

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1040 wrote to memory of 432	1040	EXCEL.EXE	30
PID 1040 wrote to memory of 432	1040	EXCEL.EXE	30
PID 1040 wrote to memory of 432	1040	EXCEL.EXE	30
PID 1040 wrote to memory of 432	1040	EXCEL.EXE	30
PID 432 wrote to memory of 332	432	cmd.exe	32
PID 432 wrote to memory of 332	432	cmd.exe	32
PID 432 wrote to memory of 332	432	cmd.exe	32
PID 432 wrote to memory of 332	432	cmd.exe	32
PID 432 wrote to memory of 960	432	cmd.exe	33
PID 432 wrote to memory of 960	432	cmd.exe	33
PID 432 wrote to memory of 960	432	cmd.exe	33
PID 432 wrote to memory of 960	432	cmd.exe	33
PID 432 wrote to memory of 960	432	cmd.exe	33
PID 432 wrote to memory of 960	432	cmd.exe	33
PID 432 wrote to memory of 960	432	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_1618344415.xlsb
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1040
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c certutil -decode %PUBLIC%\31927.dpi %PUBLIC%\31927.pdo && rundll32 %PUBLIC%\31927.pdo,DF1
  2⤵
  - Process spawned unexpected child process
  - Suspicious use of WriteProcessMemory
  PID:432
- - C:\Windows\SysWOW64\certutil.exe
    certutil -decode C:\Users\Public\31927.dpi C:\Users\Public\31927.pdo
    3⤵
    PID:332
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32 C:\Users\Public\31927.pdo,DF1
    3⤵
    - Blocklisted process makes network request
    - Loads dropped DLL
    PID:960

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/332-65-0x0000000074F31000-0x0000000074F33000-memory.dmp

Filesize
8KB

Download
memory/960-71-0x0000000000190000-0x0000000000195000-memory.dmp

Filesize
20KB

Download
memory/1040-60-0x000000002FBB1000-0x000000002FBB4000-memory.dmp

Filesize
12KB

Download
memory/1040-61-0x0000000071191000-0x0000000071193000-memory.dmp

Filesize
8KB

Download
memory/1040-62-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download

Analysis

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