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.

Processes:

certutil.exerundll32.exe

description	pid	pid_target	process	target process
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1924	796	certutil.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1904	796	rundll32.exe	EXCEL.EXE

Nloader Payload 4 IoCs

Processes:

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

Processes:

rundll32.exe

flow pid process

31 2412 rundll32.exe
Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

2412 rundll32.exe

flow	pid	process
31	2412	rundll32.exe

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

Processes:

EXCEL.EXE

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

Processes:

EXCEL.EXE

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

Processes:

EXCEL.EXE

pid process

796 EXCEL.EXE

Suspicious use of SetWindowsHookEx 13 IoCs

Processes:

EXCEL.EXE

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

Processes:

EXCEL.EXErundll32.exe

description	pid	process	target process
PID 796 wrote to memory of 1924	796	EXCEL.EXE	certutil.exe
PID 796 wrote to memory of 1924	796	EXCEL.EXE	certutil.exe
PID 796 wrote to memory of 1904	796	EXCEL.EXE	rundll32.exe
PID 796 wrote to memory of 1904	796	EXCEL.EXE	rundll32.exe
PID 1904 wrote to memory of 2412	1904	rundll32.exe	rundll32.exe
PID 1904 wrote to memory of 2412	1904	rundll32.exe	rundll32.exe
PID 1904 wrote to memory of 2412	1904	rundll32.exe	rundll32.exe

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

Replay Monitor

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Downloads

C:\Users\Public\jahi1062.pn

MD5
8a9a8739404210e7e454dc2466872f23

SHA1
a3dbb6cb1eed87147f734c933e087bd66954ca18

SHA256
8229a6d0339c001fd0ce51db1b10748d37c838baee130afea2488f2ad0e05ac4

SHA512
2479c99ffc4002c909a1e6acf66ed2b6dc32efeea0b6182eb2ca8bb5cbe65bd85e507a0bab5f1e38232918cf59f29b592dc1f83b4d9684106ebf5707e057726e

Download Submit
C:\Users\Public\jahi1062.png

MD5
a72d21e3af2cefc6ce364953a8e2d8b5

SHA1
34ed7ede30fee07b0bf64b56404bd5d43dad0be9

SHA256
0bd28eb6cbff3d7344f3e5718729ada8317edcf16e231f925dafd964cc44dcad

SHA512
606b0694680d5c4b350bc2c48b3e15399fcd94ced1977f5d423a58af2c789d72dc19e9371f1db0b7d0c953b211785851e19666dcd347d8a6a03b325eddbc4ec1

Download Submit
\Users\Public\jahi1062.pn

MD5
8a9a8739404210e7e454dc2466872f23

SHA1
a3dbb6cb1eed87147f734c933e087bd66954ca18

SHA256
8229a6d0339c001fd0ce51db1b10748d37c838baee130afea2488f2ad0e05ac4

SHA512
2479c99ffc4002c909a1e6acf66ed2b6dc32efeea0b6182eb2ca8bb5cbe65bd85e507a0bab5f1e38232918cf59f29b592dc1f83b4d9684106ebf5707e057726e

Download Submit
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/1904-9-0x0000000000000000-mapping.dmp

Download
memory/1924-7-0x0000000000000000-mapping.dmp

Download
memory/2412-11-0x0000000000000000-mapping.dmp

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