nloader | b8a21d119eb9180441ad0dd33bb760e3ca924a58ef78e7ec39fd24f2362e72f0

General

Target

order_Z0012112202927225.xlsb
Size

306KB
MD5

7e00f1f0fabe5bf5404589000e61a9af
SHA1

9429673fccc8b550a21ea9582c958f8772497b64
SHA256

39d99432698540f5ea6b8acf77b2323e2cde143638694bbd726e161924885059
SHA512

10faa2e7df209ae1f42be832b56af639769657068165b908e3d13a79c1df460c860b6a3fdfb4c0bb58e36f29104f21a3d218d568f88a1c895601e8a0319a6589

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	1428	736	cmd.exe	24

ACProtect 1.3x - 1.4x DLL software 2 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x00040000000130d9-69.dat	acprotect
behavioral1/files/0x00040000000130d9-70.dat	acprotect

Nloader Payload 1 IoCs

resource	yara_rule
behavioral1/memory/544-71-0x00000000001C0000-0x00000000001C5000-memory.dmp	nloader

Blocklisted process makes network request 1 IoCs

flow	pid	Process
5	544	rundll32.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x00040000000130d9-69.dat	upx
behavioral1/files/0x00040000000130d9-70.dat	upx

Loads dropped DLL 1 IoCs

pid	Process
544	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
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar	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
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
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
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	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
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
736	EXCEL.EXE

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
736	EXCEL.EXE
736	EXCEL.EXE
736	EXCEL.EXE

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 736 wrote to memory of 1428	736	EXCEL.EXE	30
PID 736 wrote to memory of 1428	736	EXCEL.EXE	30
PID 736 wrote to memory of 1428	736	EXCEL.EXE	30
PID 736 wrote to memory of 1428	736	EXCEL.EXE	30
PID 1428 wrote to memory of 1660	1428	cmd.exe	32
PID 1428 wrote to memory of 1660	1428	cmd.exe	32
PID 1428 wrote to memory of 1660	1428	cmd.exe	32
PID 1428 wrote to memory of 1660	1428	cmd.exe	32
PID 1428 wrote to memory of 544	1428	cmd.exe	33
PID 1428 wrote to memory of 544	1428	cmd.exe	33
PID 1428 wrote to memory of 544	1428	cmd.exe	33
PID 1428 wrote to memory of 544	1428	cmd.exe	33
PID 1428 wrote to memory of 544	1428	cmd.exe	33
PID 1428 wrote to memory of 544	1428	cmd.exe	33
PID 1428 wrote to memory of 544	1428	cmd.exe	33

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\order_Z0012112202927225.xlsb
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:736
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c certutil -decode %PUBLIC%\28222.dr1 %PUBLIC%\28222.dr3 && rundll32 %PUBLIC%\28222.dr3,DF1
  2⤵
  - Process spawned unexpected child process
  - Suspicious use of WriteProcessMemory
  PID:1428
- - C:\Windows\SysWOW64\certutil.exe
    certutil -decode C:\Users\Public\28222.dr1 C:\Users\Public\28222.dr3
    3⤵
    PID:1660
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32 C:\Users\Public\28222.dr3,DF1
    3⤵
    - Blocklisted process makes network request
    - Loads dropped DLL
    PID:544

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/544-71-0x00000000001C0000-0x00000000001C5000-memory.dmp

Filesize
20KB

Download
memory/736-60-0x000000002F1B1000-0x000000002F1B4000-memory.dmp

Filesize
12KB

Download
memory/736-61-0x00000000716A1000-0x00000000716A3000-memory.dmp

Filesize
8KB

Download
memory/736-62-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1660-65-0x0000000075891000-0x0000000075893000-memory.dmp

Filesize
8KB

Download

Analysis

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