nloader | 006c3eedb21ea1f0499fb3b9624b3f104bd0223f9bd1f84b4017e8e60f9da3c0

General

Target

_____.xls

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	1056	1684	certutil.exe	24
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	568	1684	rundll32.exe	24

Nloader Payload 3 IoCs

resource	yara_rule
behavioral1/memory/568-13-0x0000000000180000-0x0000000000189000-memory.dmp	nloader
behavioral1/memory/568-14-0x0000000010000000-0x0000000010007000-memory.dmp	nloader
behavioral1/memory/568-17-0x00000000000C0000-0x00000000000C7000-memory.dmp	nloader

Loads dropped DLL 1 IoCs

pid	Process
568	rundll32.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1084	568	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-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt	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
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 (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\Se&nd to OneNote	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
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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1684	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
1084	WerFault.exe
1084	WerFault.exe
1084	WerFault.exe
1084	WerFault.exe
1084	WerFault.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1684	EXCEL.EXE

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1084	WerFault.exe

Suspicious use of SetWindowsHookEx 6 IoCs

pid	Process
1684	EXCEL.EXE
1684	EXCEL.EXE
1684	EXCEL.EXE
1684	EXCEL.EXE
1684	EXCEL.EXE
1684	EXCEL.EXE

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1684 wrote to memory of 1056	1684	EXCEL.EXE	30
PID 1684 wrote to memory of 1056	1684	EXCEL.EXE	30
PID 1684 wrote to memory of 1056	1684	EXCEL.EXE	30
PID 1684 wrote to memory of 1056	1684	EXCEL.EXE	30
PID 1684 wrote to memory of 568	1684	EXCEL.EXE	32
PID 1684 wrote to memory of 568	1684	EXCEL.EXE	32
PID 1684 wrote to memory of 568	1684	EXCEL.EXE	32
PID 1684 wrote to memory of 568	1684	EXCEL.EXE	32
PID 1684 wrote to memory of 568	1684	EXCEL.EXE	32
PID 1684 wrote to memory of 568	1684	EXCEL.EXE	32
PID 1684 wrote to memory of 568	1684	EXCEL.EXE	32
PID 568 wrote to memory of 1084	568	rundll32.exe	34
PID 568 wrote to memory of 1084	568	rundll32.exe	34
PID 568 wrote to memory of 1084	568	rundll32.exe	34
PID 568 wrote to memory of 1084	568	rundll32.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\_____.xls
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1684
- C:\Windows\SysWOW64\certutil.exe
  "C:\Windows\System32\certutil.exe" -decode C:\Users\Public\jahi1088.png C:\Users\Public\jahi1088.pn
  2⤵
  - Process spawned unexpected child process
  PID:1056
- C:\Windows\SysWOW64\rundll32.exe
  "C:\Windows\System32\rundll32.exe" C:\Users\Public\jahi1088.pn,DF j1
  2⤵
  - Process spawned unexpected child process
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:568
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 568 -s 332
    3⤵
    - Program crash
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1084

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/568-17-0x00000000000C0000-0x00000000000C7000-memory.dmp

Filesize
28KB

Download
memory/568-14-0x0000000010000000-0x0000000010007000-memory.dmp

Filesize
28KB

Download
memory/568-13-0x0000000000180000-0x0000000000189000-memory.dmp

Filesize
36KB

Download
memory/908-5-0x000007FEF68D0000-0x000007FEF6B4A000-memory.dmp

Filesize
2.5MB

Download
memory/1056-7-0x00000000756A1000-0x00000000756A3000-memory.dmp

Filesize
8KB

Download
memory/1084-16-0x0000000001DE0000-0x0000000001DF1000-memory.dmp

Filesize
68KB

Download
memory/1084-18-0x0000000000360000-0x0000000000361000-memory.dmp

Filesize
4KB

Download
memory/1684-2-0x000000002FED1000-0x000000002FED4000-memory.dmp

Filesize
12KB

Download
memory/1684-4-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1684-3-0x0000000071AC1000-0x0000000071AC3000-memory.dmp

Filesize
8KB

Download

Analysis

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