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

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 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 (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1612	1856	certutil.exe	24
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1772	1856	rundll32.exe	24

Nloader Payload 3 IoCs

resource	yara_rule
behavioral1/memory/1772-13-0x00000000001C0000-0x00000000001C9000-memory.dmp	nloader
behavioral1/memory/1772-14-0x0000000010000000-0x0000000010007000-memory.dmp	nloader
behavioral1/memory/1772-17-0x00000000001B0000-0x00000000001B7000-memory.dmp	nloader

Loads dropped DLL 1 IoCs

pid	Process
1772	rundll32.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1760	1772	WerFault.exe	32

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-1-5-21-293278959-2699126792-324916226-1000\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-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\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-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1856	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
1760	WerFault.exe
1760	WerFault.exe
1760	WerFault.exe
1760	WerFault.exe
1760	WerFault.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1760	WerFault.exe

Suspicious use of SetWindowsHookEx 5 IoCs

pid	Process
1856	EXCEL.EXE
1856	EXCEL.EXE
1856	EXCEL.EXE
1856	EXCEL.EXE
1856	EXCEL.EXE

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1856 wrote to memory of 1612	1856	EXCEL.EXE	30
PID 1856 wrote to memory of 1612	1856	EXCEL.EXE	30
PID 1856 wrote to memory of 1612	1856	EXCEL.EXE	30
PID 1856 wrote to memory of 1612	1856	EXCEL.EXE	30
PID 1856 wrote to memory of 1772	1856	EXCEL.EXE	32
PID 1856 wrote to memory of 1772	1856	EXCEL.EXE	32
PID 1856 wrote to memory of 1772	1856	EXCEL.EXE	32
PID 1856 wrote to memory of 1772	1856	EXCEL.EXE	32
PID 1856 wrote to memory of 1772	1856	EXCEL.EXE	32
PID 1856 wrote to memory of 1772	1856	EXCEL.EXE	32
PID 1856 wrote to memory of 1772	1856	EXCEL.EXE	32
PID 1772 wrote to memory of 1760	1772	rundll32.exe	33
PID 1772 wrote to memory of 1760	1772	rundll32.exe	33
PID 1772 wrote to memory of 1760	1772	rundll32.exe	33
PID 1772 wrote to memory of 1760	1772	rundll32.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\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:1856
- C:\Windows\SysWOW64\certutil.exe
  "C:\Windows\System32\certutil.exe" -decode C:\Users\Public\jahi1635.png C:\Users\Public\jahi1635.pn
  2⤵
  - Process spawned unexpected child process
  PID:1612
- C:\Windows\SysWOW64\rundll32.exe
  "C:\Windows\System32\rundll32.exe" C:\Users\Public\jahi1635.pn,DF j1
  2⤵
  - Process spawned unexpected child process
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1772
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1772 -s 332
    3⤵
    - Program crash
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1760

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/324-5-0x000007FEF7F70000-0x000007FEF81EA000-memory.dmp

Filesize
2.5MB

Download
memory/1612-7-0x00000000767E1000-0x00000000767E3000-memory.dmp

Filesize
8KB

Download
memory/1760-16-0x0000000002390000-0x00000000023A1000-memory.dmp

Filesize
68KB

Download
memory/1760-18-0x0000000000380000-0x0000000000381000-memory.dmp

Filesize
4KB

Download
memory/1772-13-0x00000000001C0000-0x00000000001C9000-memory.dmp

Filesize
36KB

Download
memory/1772-14-0x0000000010000000-0x0000000010007000-memory.dmp

Filesize
28KB

Download
memory/1772-17-0x00000000001B0000-0x00000000001B7000-memory.dmp

Filesize
28KB

Download
memory/1856-2-0x000000002FE31000-0x000000002FE34000-memory.dmp

Filesize
12KB

Download
memory/1856-4-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1856-3-0x00000000719D1000-0x00000000719D3000-memory.dmp

Filesize
8KB

Download

Analysis

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