nloader | 426edb65615875c5f8fd31118142f0b3d2e29b360a7995d69d58803e61c1f81e

General

Target

_____.xls
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	268	2032	certutil.exe	24
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	924	2032	rundll32.exe	24

Nloader Payload 3 IoCs

resource	yara_rule
behavioral1/memory/924-69-0x0000000000180000-0x0000000000189000-memory.dmp	nloader
behavioral1/memory/924-72-0x0000000010000000-0x0000000010007000-memory.dmp	nloader
behavioral1/memory/924-76-0x0000000000160000-0x0000000000167000-memory.dmp	nloader

Loads dropped DLL 1 IoCs

pid	Process
924	rundll32.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1480	924	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
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
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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2032	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
1480	WerFault.exe
1480	WerFault.exe
1480	WerFault.exe
1480	WerFault.exe
1480	WerFault.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1480	WerFault.exe

Suspicious use of SetWindowsHookEx 6 IoCs

pid	Process
2032	EXCEL.EXE
2032	EXCEL.EXE
2032	EXCEL.EXE
2032	EXCEL.EXE
2032	EXCEL.EXE
2032	EXCEL.EXE

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2032 wrote to memory of 268	2032	EXCEL.EXE	30
PID 2032 wrote to memory of 268	2032	EXCEL.EXE	30
PID 2032 wrote to memory of 268	2032	EXCEL.EXE	30
PID 2032 wrote to memory of 268	2032	EXCEL.EXE	30
PID 2032 wrote to memory of 924	2032	EXCEL.EXE	32
PID 2032 wrote to memory of 924	2032	EXCEL.EXE	32
PID 2032 wrote to memory of 924	2032	EXCEL.EXE	32
PID 2032 wrote to memory of 924	2032	EXCEL.EXE	32
PID 2032 wrote to memory of 924	2032	EXCEL.EXE	32
PID 2032 wrote to memory of 924	2032	EXCEL.EXE	32
PID 2032 wrote to memory of 924	2032	EXCEL.EXE	32
PID 924 wrote to memory of 1480	924	rundll32.exe	34
PID 924 wrote to memory of 1480	924	rundll32.exe	34
PID 924 wrote to memory of 1480	924	rundll32.exe	34
PID 924 wrote to memory of 1480	924	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 use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2032
- C:\Windows\SysWOW64\certutil.exe
  "C:\Windows\System32\certutil.exe" -decode C:\Users\Public\jahi1399.png C:\Users\Public\jahi1399.pn
  2⤵
  - Process spawned unexpected child process
  PID:268
- C:\Windows\SysWOW64\rundll32.exe
  "C:\Windows\System32\rundll32.exe" C:\Users\Public\jahi1399.pn,DF j1
  2⤵
  - Process spawned unexpected child process
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:924
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 924 -s 332
    3⤵
    - Program crash
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1480

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/268-63-0x0000000075C31000-0x0000000075C33000-memory.dmp

Filesize
8KB

Download
memory/924-69-0x0000000000180000-0x0000000000189000-memory.dmp

Filesize
36KB

Download
memory/924-72-0x0000000010000000-0x0000000010007000-memory.dmp

Filesize
28KB

Download
memory/924-74-0x0000000010003000-0x0000000010004000-memory.dmp

Filesize
4KB

Download
memory/924-76-0x0000000000160000-0x0000000000167000-memory.dmp

Filesize
28KB

Download
memory/1480-77-0x0000000000280000-0x0000000000281000-memory.dmp

Filesize
4KB

Download
memory/2032-59-0x000000002F511000-0x000000002F514000-memory.dmp

Filesize
12KB

Download
memory/2032-61-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/2032-60-0x0000000071D11000-0x0000000071D13000-memory.dmp

Filesize
8KB

Download

Analysis

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