nloader | d51711eecb03950944b65626423e1b36ff93d4852a715f25051cb683a16ff34d

General

Target

隧ｳ邏ｰ諠・ｱ.xlsb
Size

327KB
MD5

e88b03763c5090769c37e24b58c4b987
SHA1

7bb0453fb4e4b5333fcd78df541ae9a3bd86105d
SHA256

d51711eecb03950944b65626423e1b36ff93d4852a715f25051cb683a16ff34d
SHA512

f5ee7ade598a78178eba571c9807f3d835171f4ff9bec2e25d7ab82644279a7b3353d79182aebb243376c6f8b7c30e7d14ab1dc27aaa2decb9580a964ae7557c

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	608	1988	cmd.exe	24

ACProtect 1.3x - 1.4x DLL software 2 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x00040000000130e7-69.dat	acprotect
behavioral1/files/0x00040000000130e7-70.dat	acprotect

Nloader Payload 1 IoCs

resource	yara_rule
behavioral1/memory/852-71-0x0000000010000000-0x0000000010005000-memory.dmp	nloader

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x00040000000130e7-69.dat	upx
behavioral1/files/0x00040000000130e7-70.dat	upx

Loads dropped DLL 1 IoCs

pid	Process
852	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 (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\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-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\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-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1988	EXCEL.EXE

Suspicious use of SetWindowsHookEx 7 IoCs

pid	Process
1988	EXCEL.EXE
1988	EXCEL.EXE
1988	EXCEL.EXE
1988	EXCEL.EXE
1988	EXCEL.EXE
1988	EXCEL.EXE
1988	EXCEL.EXE

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1988 wrote to memory of 608	1988	EXCEL.EXE	27
PID 1988 wrote to memory of 608	1988	EXCEL.EXE	27
PID 1988 wrote to memory of 608	1988	EXCEL.EXE	27
PID 1988 wrote to memory of 608	1988	EXCEL.EXE	27
PID 608 wrote to memory of 456	608	cmd.exe	29
PID 608 wrote to memory of 456	608	cmd.exe	29
PID 608 wrote to memory of 456	608	cmd.exe	29
PID 608 wrote to memory of 456	608	cmd.exe	29
PID 608 wrote to memory of 852	608	cmd.exe	30
PID 608 wrote to memory of 852	608	cmd.exe	30
PID 608 wrote to memory of 852	608	cmd.exe	30
PID 608 wrote to memory of 852	608	cmd.exe	30
PID 608 wrote to memory of 852	608	cmd.exe	30
PID 608 wrote to memory of 852	608	cmd.exe	30
PID 608 wrote to memory of 852	608	cmd.exe	30

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\隧ｳ邏ｰ諠・ｱ.xlsb
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1988
- 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:608
- - C:\Windows\SysWOW64\certutil.exe
    certutil -f -decode C:\Users\Public\42237.j56 C:\Users\Public\42237.h5
    3⤵
    PID:456
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32 C:\Users\Public\42237.h5,DF
    3⤵
    - Loads dropped DLL
    PID:852

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/456-65-0x0000000075B31000-0x0000000075B33000-memory.dmp

Filesize
8KB

Download
memory/852-71-0x0000000010000000-0x0000000010005000-memory.dmp

Filesize
20KB

Download
memory/1988-60-0x000000002F5F1000-0x000000002F5F4000-memory.dmp

Filesize
12KB

Download
memory/1988-61-0x0000000071B91000-0x0000000071B93000-memory.dmp

Filesize
8KB

Download
memory/1988-62-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download

Resubmissions

Analysis

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