nloader | 006c3eedb21ea1f0499fb3b9624b3f104bd0223f9bd1f84b4017e8e60f9da3c0

General

Target

_____.xls

Score

10^/10

nloader loader

Malware Config

Signatures

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

Process spawned unexpected child process 2 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\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1924	796	certutil.exe	67
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1904	796	rundll32.exe	67

Nloader Payload 4 IoCs

resource	yara_rule
behavioral2/memory/2412-13-0x0000000000790000-0x0000000000799000-memory.dmp	nloader
behavioral2/memory/2412-14-0x0000000010000000-0x0000000010007000-memory.dmp	nloader
behavioral2/memory/2412-15-0x0000000000950000-0x0000000000955000-memory.dmp	nloader
behavioral2/memory/2412-16-0x0000000000770000-0x0000000000777000-memory.dmp	nloader

Blocklisted process makes network request 1 IoCs

flow	pid	Process
31	2412	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
2412	rundll32.exe

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
796	EXCEL.EXE

Suspicious use of SetWindowsHookEx 13 IoCs

pid	Process
796	EXCEL.EXE
796	EXCEL.EXE
796	EXCEL.EXE
796	EXCEL.EXE
796	EXCEL.EXE
796	EXCEL.EXE
796	EXCEL.EXE
796	EXCEL.EXE
796	EXCEL.EXE
796	EXCEL.EXE
796	EXCEL.EXE
796	EXCEL.EXE
796	EXCEL.EXE

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 796 wrote to memory of 1924	796	EXCEL.EXE	81
PID 796 wrote to memory of 1924	796	EXCEL.EXE	81
PID 796 wrote to memory of 1904	796	EXCEL.EXE	83
PID 796 wrote to memory of 1904	796	EXCEL.EXE	83
PID 1904 wrote to memory of 2412	1904	rundll32.exe	84
PID 1904 wrote to memory of 2412	1904	rundll32.exe	84
PID 1904 wrote to memory of 2412	1904	rundll32.exe	84

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\_____.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:796
- C:\Windows\System32\certutil.exe
  "C:\Windows\System32\certutil.exe" -decode C:\Users\Public\jahi1062.png C:\Users\Public\jahi1062.pn
  2⤵
  - Process spawned unexpected child process
  PID:1924
- C:\Windows\System32\rundll32.exe
  "C:\Windows\System32\rundll32.exe" C:\Users\Public\jahi1062.pn,DF j1
  2⤵
  - Process spawned unexpected child process
  - Suspicious use of WriteProcessMemory
  PID:1904
- - C:\Windows\SysWOW64\rundll32.exe
    "C:\Windows\System32\rundll32.exe" C:\Users\Public\jahi1062.pn,DF j1
    3⤵
    - Blocklisted process makes network request
    - Loads dropped DLL
    PID:2412

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/796-5-0x00007FF99EB90000-0x00007FF99F1C7000-memory.dmp

Filesize
6.2MB

Download
memory/796-6-0x00007FF97B640000-0x00007FF97B650000-memory.dmp

Filesize
64KB

Download
memory/796-2-0x00007FF97B640000-0x00007FF97B650000-memory.dmp

Filesize
64KB

Download
memory/796-4-0x00007FF97B640000-0x00007FF97B650000-memory.dmp

Filesize
64KB

Download
memory/796-3-0x00007FF97B640000-0x00007FF97B650000-memory.dmp

Filesize
64KB

Download
memory/2412-13-0x0000000000790000-0x0000000000799000-memory.dmp

Filesize
36KB

Download
memory/2412-14-0x0000000010000000-0x0000000010007000-memory.dmp

Filesize
28KB

Download
memory/2412-15-0x0000000000950000-0x0000000000955000-memory.dmp

Filesize
20KB

Download
memory/2412-16-0x0000000000770000-0x0000000000777000-memory.dmp

Filesize
28KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads