nloader | 42aeef1b5f9d53105bd3d9076b7634e1eed53f89c9e3577426f4c51441e4fca4

General

Target

cancel_sub_JPL12345678901234.xlsb
Size

267KB
MD5

21a57dbd1dad6aec8edbbaeddabac81b
SHA1

f20bdcb3970bc9fabfff60628a71cfe318d4efe9
SHA256

42aeef1b5f9d53105bd3d9076b7634e1eed53f89c9e3577426f4c51441e4fca4
SHA512

a2339ff6347d6d3dff885b8317de5a87df589462052ac2c6dc8fb09715aca149379bc7e71e7c1ba2ccae976e7d0d4d1790971db6dc92b57ab35810953bc73563

Score

10^/10

nloader loader

Malware Config

Extracted

Language

xlm4.0

Source

Signatures

Nloader
Simple loader that includes the keyword 'campo' 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	904	1040	cmd.exe	24

Nloader Payload 1 IoCs

resource	yara_rule
behavioral1/memory/1960-73-0x0000000000170000-0x0000000000175000-memory.dmp	nloader

Blocklisted process makes network request 1 IoCs

flow	pid	Process
5	1960	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
1960	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 (int)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\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-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\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-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1040	EXCEL.EXE

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1040	EXCEL.EXE
1040	EXCEL.EXE
1040	EXCEL.EXE

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1040 wrote to memory of 1724	1040	EXCEL.EXE	26
PID 1040 wrote to memory of 1724	1040	EXCEL.EXE	26
PID 1040 wrote to memory of 1724	1040	EXCEL.EXE	26
PID 1040 wrote to memory of 1724	1040	EXCEL.EXE	26
PID 1040 wrote to memory of 904	1040	EXCEL.EXE	31
PID 1040 wrote to memory of 904	1040	EXCEL.EXE	31
PID 1040 wrote to memory of 904	1040	EXCEL.EXE	31
PID 1040 wrote to memory of 904	1040	EXCEL.EXE	31
PID 904 wrote to memory of 1088	904	cmd.exe	33
PID 904 wrote to memory of 1088	904	cmd.exe	33
PID 904 wrote to memory of 1088	904	cmd.exe	33
PID 904 wrote to memory of 1088	904	cmd.exe	33
PID 904 wrote to memory of 1960	904	cmd.exe	34
PID 904 wrote to memory of 1960	904	cmd.exe	34
PID 904 wrote to memory of 1960	904	cmd.exe	34
PID 904 wrote to memory of 1960	904	cmd.exe	34
PID 904 wrote to memory of 1960	904	cmd.exe	34
PID 904 wrote to memory of 1960	904	cmd.exe	34
PID 904 wrote to memory of 1960	904	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\cancel_sub_JPL12345678901234.xlsb
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1040
- C:\Windows\splwow64.exe
  C:\Windows\splwow64.exe 12288
  2⤵
  PID:1724
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c certutil -decode C:\Users\Public\4802545.xs1 C:\Users\Public\4802545.xs2 && rundll32 C:\Users\Public\4802545.xs2,DF1
  2⤵
  - Process spawned unexpected child process
  - Suspicious use of WriteProcessMemory
  PID:904
- - C:\Windows\SysWOW64\certutil.exe
    certutil -decode C:\Users\Public\4802545.xs1 C:\Users\Public\4802545.xs2
    3⤵
    PID:1088
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32 C:\Users\Public\4802545.xs2,DF1
    3⤵
    - Blocklisted process makes network request
    - Loads dropped DLL
    PID:1960

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/1040-61-0x0000000071191000-0x0000000071193000-memory.dmp

Filesize
8KB

Download
memory/1040-62-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1040-60-0x000000002FE51000-0x000000002FE54000-memory.dmp

Filesize
12KB

Download
memory/1088-67-0x0000000074F31000-0x0000000074F33000-memory.dmp

Filesize
8KB

Download
memory/1724-64-0x000007FEFBA81000-0x000007FEFBA83000-memory.dmp

Filesize
8KB

Download
memory/1960-73-0x0000000000170000-0x0000000000175000-memory.dmp

Filesize
20KB

Download

Analysis

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