nloader | 720ac949e6743c94b40a02c010489f57696122431ccd4d9ab7a3eee00b8f7a77

General

Target

B06CO4I2G0u642m5Gi6R.xlsb
Size

327KB
MD5

11ae52bd9c6a338582892d1a0e565269
SHA1

3b29f297c2abe8208da5071724db6361348d0d17
SHA256

720ac949e6743c94b40a02c010489f57696122431ccd4d9ab7a3eee00b8f7a77
SHA512

af8b710f2ef8b0edc2b97930cbc703bb08497c961b34357fb0b6895108de16e53d3fe936357cea2fc907c444256868ec71b5959c6bd933d60bb07053a094b4d7

Score

10^/10

nloader loader upx

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	1848	1100	cmd.exe	24

ACProtect 1.3x - 1.4x DLL software 2 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x0004000000013111-69.dat	acprotect
behavioral1/files/0x0004000000013111-70.dat	acprotect

Nloader Payload 1 IoCs

resource	yara_rule
behavioral1/memory/652-71-0x0000000010000000-0x0000000010005000-memory.dmp	nloader

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x0004000000013111-69.dat	upx
behavioral1/files/0x0004000000013111-70.dat	upx

Loads dropped DLL 1 IoCs

pid	Process
652	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\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\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\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
1100	EXCEL.EXE

Suspicious use of SetWindowsHookEx 8 IoCs

pid	Process
1100	EXCEL.EXE
1100	EXCEL.EXE
1100	EXCEL.EXE
1100	EXCEL.EXE
1100	EXCEL.EXE
1100	EXCEL.EXE
1100	EXCEL.EXE
1100	EXCEL.EXE

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1100 wrote to memory of 1848	1100	EXCEL.EXE	30
PID 1100 wrote to memory of 1848	1100	EXCEL.EXE	30
PID 1100 wrote to memory of 1848	1100	EXCEL.EXE	30
PID 1100 wrote to memory of 1848	1100	EXCEL.EXE	30
PID 1848 wrote to memory of 1404	1848	cmd.exe	32
PID 1848 wrote to memory of 1404	1848	cmd.exe	32
PID 1848 wrote to memory of 1404	1848	cmd.exe	32
PID 1848 wrote to memory of 1404	1848	cmd.exe	32
PID 1848 wrote to memory of 652	1848	cmd.exe	34
PID 1848 wrote to memory of 652	1848	cmd.exe	34
PID 1848 wrote to memory of 652	1848	cmd.exe	34
PID 1848 wrote to memory of 652	1848	cmd.exe	34
PID 1848 wrote to memory of 652	1848	cmd.exe	34
PID 1848 wrote to memory of 652	1848	cmd.exe	34
PID 1848 wrote to memory of 652	1848	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\B06CO4I2G0u642m5Gi6R.xlsb
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1100
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c certutil -f -decode C:\Users\Public\42237.j56 C:\Users\Public\42237.h5 && rundll32 C:\Users\Public\42237.h5,DF
  2⤵
  - Process spawned unexpected child process
  - Suspicious use of WriteProcessMemory
  PID:1848
- - C:\Windows\SysWOW64\certutil.exe
    certutil -f -decode C:\Users\Public\42237.j56 C:\Users\Public\42237.h5
    3⤵
    PID:1404
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32 C:\Users\Public\42237.h5,DF
    3⤵
    - Loads dropped DLL
    PID:652

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/652-71-0x0000000010000000-0x0000000010005000-memory.dmp

Filesize
20KB

Download
memory/1100-60-0x000000002FD11000-0x000000002FD14000-memory.dmp

Filesize
12KB

Download
memory/1100-61-0x00000000715A1000-0x00000000715A3000-memory.dmp

Filesize
8KB

Download
memory/1100-62-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1404-65-0x00000000757D1000-0x00000000757D3000-memory.dmp

Filesize
8KB

Download

Analysis

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