nloader | 3ec34f115754827e485cf6eece92db8051fd85c1ebfd104494f5e6c634d07b08

General

Target

詳細情報/詳細情報.xlsb
Size

317KB
MD5

169685039016891f5442292ad95e51c9
SHA1

a2db74f9ab457c403e238cb2410848447f89548e
SHA256

7d1ff39fc6daab153ad6477554415336578256257aa81fd796a48b89c7a8b2e8
SHA512

7c990325b11c661fb3acd7a0f8ed312844b190d3211c2468aa7854271717c9ad96c77dd5e9fcf7042a2e5ce6001d7a6a4edc48265e052d93e128334de4e0e905

Score

10^/10

nloader loader upx

Malware Config

Extracted

Language

xlm4.0

Source

Signatures

Nloader
Simple loader that includes the keyword 'cambo' 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	1456	1640	cmd.exe	24

ACProtect 1.3x - 1.4x DLL software 2 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x00040000000130e3-68.dat	acprotect
behavioral1/files/0x00040000000130e3-69.dat	acprotect

Nloader Payload 1 IoCs

resource	yara_rule
behavioral1/memory/912-70-0x0000000010000000-0x0000000010005000-memory.dmp	nloader

Blocklisted process makes network request 1 IoCs

flow	pid	Process
5	912	rundll32.exe

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/files/0x00040000000130e3-68.dat	upx
behavioral1/files/0x00040000000130e3-69.dat	upx

Loads dropped DLL 1 IoCs

pid	Process
912	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-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\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-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1640	EXCEL.EXE

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1640	EXCEL.EXE
1640	EXCEL.EXE
1640	EXCEL.EXE

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1640 wrote to memory of 1456	1640	EXCEL.EXE	30
PID 1640 wrote to memory of 1456	1640	EXCEL.EXE	30
PID 1640 wrote to memory of 1456	1640	EXCEL.EXE	30
PID 1640 wrote to memory of 1456	1640	EXCEL.EXE	30
PID 1456 wrote to memory of 460	1456	cmd.exe	32
PID 1456 wrote to memory of 460	1456	cmd.exe	32
PID 1456 wrote to memory of 460	1456	cmd.exe	32
PID 1456 wrote to memory of 460	1456	cmd.exe	32
PID 1456 wrote to memory of 912	1456	cmd.exe	34
PID 1456 wrote to memory of 912	1456	cmd.exe	34
PID 1456 wrote to memory of 912	1456	cmd.exe	34
PID 1456 wrote to memory of 912	1456	cmd.exe	34
PID 1456 wrote to memory of 912	1456	cmd.exe	34
PID 1456 wrote to memory of 912	1456	cmd.exe	34
PID 1456 wrote to memory of 912	1456	cmd.exe	34

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\詳細情報\詳細情報.xlsb
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1640
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c certutil -decode %PUBLIC%\14118.doy %PUBLIC%\14118.biy && rundll32 %PUBLIC%\14118.biy,DF1
  2⤵
  - Process spawned unexpected child process
  - Suspicious use of WriteProcessMemory
  PID:1456
- - C:\Windows\SysWOW64\certutil.exe
    certutil -decode C:\Users\Public\14118.doy C:\Users\Public\14118.biy
    3⤵
    PID:460
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32 C:\Users\Public\14118.biy,DF1
    3⤵
    - Blocklisted process makes network request
    - Loads dropped DLL
    PID:912

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/460-64-0x00000000761E1000-0x00000000761E3000-memory.dmp

Filesize
8KB

Download
memory/912-70-0x0000000010000000-0x0000000010005000-memory.dmp

Filesize
20KB

Download
memory/1640-59-0x000000002F2D1000-0x000000002F2D4000-memory.dmp

Filesize
12KB

Download
memory/1640-60-0x0000000071521000-0x0000000071523000-memory.dmp

Filesize
8KB

Download
memory/1640-61-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download

Analysis

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