nloader | 426edb65615875c5f8fd31118142f0b3d2e29b360a7995d69d58803e61c1f81e

General

Target

詳細情報.xlsb
Size

153KB
MD5

cb5a37aac155775daed9abcfd680f39c
SHA1

75cfc87fe3f6f517e684729a558358fd5d492599
SHA256

426edb65615875c5f8fd31118142f0b3d2e29b360a7995d69d58803e61c1f81e
SHA512

cd12773f8a606b0e04e7e02f4b8f1abab1c8efb13008ee6134771954c857f32df6dfd7f74b5a43d206eae40ceac4219e09910c22918a02f2a57e95f747d9b39f

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	1292	4704	certutil.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4012	4704	rundll32.exe	EXCEL.EXE

Nloader Payload 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4368-13-0x00000000007F0000-0x00000000007F9000-memory.dmp	nloader
behavioral2/memory/4368-14-0x0000000010000000-0x0000000010007000-memory.dmp	nloader
behavioral2/memory/4368-15-0x0000000000AA0000-0x0000000000AA5000-memory.dmp	nloader
behavioral2/memory/4368-16-0x00000000007E0000-0x00000000007E7000-memory.dmp	nloader

Blocklisted process makes network request 1 IoCs

Processes:

rundll32.exe

flow pid process

27 4368 rundll32.exe
Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

4368 rundll32.exe

flow	pid	process
27	4368	rundll32.exe

pid	process
4368	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

4704 EXCEL.EXE
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

EXCEL.EXE

pid process

4704 EXCEL.EXE
4704 EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
4704	EXCEL.EXE
4704	EXCEL.EXE
4704	EXCEL.EXE
4704	EXCEL.EXE
4704	EXCEL.EXE
4704	EXCEL.EXE
4704	EXCEL.EXE
4704	EXCEL.EXE
4704	EXCEL.EXE
4704	EXCEL.EXE
4704	EXCEL.EXE
4704	EXCEL.EXE

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

EXCEL.EXErundll32.exe

description	pid	process	target process
PID 4704 wrote to memory of 1292	4704	EXCEL.EXE	certutil.exe
PID 4704 wrote to memory of 1292	4704	EXCEL.EXE	certutil.exe
PID 4704 wrote to memory of 4012	4704	EXCEL.EXE	rundll32.exe
PID 4704 wrote to memory of 4012	4704	EXCEL.EXE	rundll32.exe
PID 4012 wrote to memory of 4368	4012	rundll32.exe	rundll32.exe
PID 4012 wrote to memory of 4368	4012	rundll32.exe	rundll32.exe
PID 4012 wrote to memory of 4368	4012	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\詳細情報.xlsb"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4704
- C:\Windows\System32\certutil.exe
  "C:\Windows\System32\certutil.exe" -decode C:\Users\Public\jahi1419.png C:\Users\Public\jahi1419.pn
  2⤵
  - Process spawned unexpected child process
  PID:1292
- C:\Windows\System32\rundll32.exe
  "C:\Windows\System32\rundll32.exe" C:\Users\Public\jahi1419.pn,DF j1
  2⤵
  - Process spawned unexpected child process
  - Suspicious use of WriteProcessMemory
  PID:4012
- - C:\Windows\SysWOW64\rundll32.exe
    "C:\Windows\System32\rundll32.exe" C:\Users\Public\jahi1419.pn,DF j1
    3⤵
    - Blocklisted process makes network request
    - Loads dropped DLL
    PID:4368

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\jahi1419.pn

MD5
8a9a8739404210e7e454dc2466872f23

SHA1
a3dbb6cb1eed87147f734c933e087bd66954ca18

SHA256
8229a6d0339c001fd0ce51db1b10748d37c838baee130afea2488f2ad0e05ac4

SHA512
2479c99ffc4002c909a1e6acf66ed2b6dc32efeea0b6182eb2ca8bb5cbe65bd85e507a0bab5f1e38232918cf59f29b592dc1f83b4d9684106ebf5707e057726e

Download Submit
C:\Users\Public\jahi1419.png

MD5
a72d21e3af2cefc6ce364953a8e2d8b5

SHA1
34ed7ede30fee07b0bf64b56404bd5d43dad0be9

SHA256
0bd28eb6cbff3d7344f3e5718729ada8317edcf16e231f925dafd964cc44dcad

SHA512
606b0694680d5c4b350bc2c48b3e15399fcd94ced1977f5d423a58af2c789d72dc19e9371f1db0b7d0c953b211785851e19666dcd347d8a6a03b325eddbc4ec1

Download Submit
\Users\Public\jahi1419.pn

MD5
8a9a8739404210e7e454dc2466872f23

SHA1
a3dbb6cb1eed87147f734c933e087bd66954ca18

SHA256
8229a6d0339c001fd0ce51db1b10748d37c838baee130afea2488f2ad0e05ac4

SHA512
2479c99ffc4002c909a1e6acf66ed2b6dc32efeea0b6182eb2ca8bb5cbe65bd85e507a0bab5f1e38232918cf59f29b592dc1f83b4d9684106ebf5707e057726e

Download Submit
memory/1292-7-0x0000000000000000-mapping.dmp

Download
memory/4012-9-0x0000000000000000-mapping.dmp

Download
memory/4368-11-0x0000000000000000-mapping.dmp

Download
memory/4368-13-0x00000000007F0000-0x00000000007F9000-memory.dmp

Filesize
36KB

Download
memory/4368-14-0x0000000010000000-0x0000000010007000-memory.dmp

Filesize
28KB

Download
memory/4368-15-0x0000000000AA0000-0x0000000000AA5000-memory.dmp

Filesize
20KB

Download
memory/4368-16-0x00000000007E0000-0x00000000007E7000-memory.dmp

Filesize
28KB

Download
memory/4704-6-0x00007FF965210000-0x00007FF965220000-memory.dmp

Filesize
64KB

Download
memory/4704-5-0x00007FF988AF0000-0x00007FF989127000-memory.dmp

Filesize
6.2MB

Download
memory/4704-4-0x00007FF965210000-0x00007FF965220000-memory.dmp

Filesize
64KB

Download
memory/4704-2-0x00007FF965210000-0x00007FF965220000-memory.dmp

Filesize
64KB

Download
memory/4704-3-0x00007FF965210000-0x00007FF965220000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads