nloader | 68ef8ffa46a0d0ea1a981ad7bcfbaf1c7ad2680ddfac2a2d4b0822a23aaf4247

General

Target

subscription_1618334083.xlsb
Size

182KB
MD5

9d8889711256df5fba21cac45ff2be6e
SHA1

72c600faaaf2168a46922b101589dff2c3579264
SHA256

68ef8ffa46a0d0ea1a981ad7bcfbaf1c7ad2680ddfac2a2d4b0822a23aaf4247
SHA512

7e1874bbae50d15de0b0dece24f0122ec473f1d3ea0f21ba47b25dd941fe2512800fef54047752f8f5808db586c75ef73e770d6b4b4c67aded4613979074cca7

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	316	1080	cmd.exe	24

Nloader Payload 1 IoCs

resource	yara_rule
behavioral1/memory/1016-71-0x0000000000180000-0x0000000000185000-memory.dmp	nloader

Loads dropped DLL 1 IoCs

pid	Process
1016	rundll32.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
952	1016	WerFault.exe	33

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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1080	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
952	WerFault.exe
952	WerFault.exe
952	WerFault.exe
952	WerFault.exe
952	WerFault.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
952	WerFault.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	952	WerFault.exe

Suspicious use of SetWindowsHookEx 5 IoCs

pid	Process
1080	EXCEL.EXE
1080	EXCEL.EXE
1080	EXCEL.EXE
1080	EXCEL.EXE
1080	EXCEL.EXE

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1080 wrote to memory of 316	1080	EXCEL.EXE	30
PID 1080 wrote to memory of 316	1080	EXCEL.EXE	30
PID 1080 wrote to memory of 316	1080	EXCEL.EXE	30
PID 1080 wrote to memory of 316	1080	EXCEL.EXE	30
PID 316 wrote to memory of 1904	316	cmd.exe	32
PID 316 wrote to memory of 1904	316	cmd.exe	32
PID 316 wrote to memory of 1904	316	cmd.exe	32
PID 316 wrote to memory of 1904	316	cmd.exe	32
PID 316 wrote to memory of 1016	316	cmd.exe	33
PID 316 wrote to memory of 1016	316	cmd.exe	33
PID 316 wrote to memory of 1016	316	cmd.exe	33
PID 316 wrote to memory of 1016	316	cmd.exe	33
PID 316 wrote to memory of 1016	316	cmd.exe	33
PID 316 wrote to memory of 1016	316	cmd.exe	33
PID 316 wrote to memory of 1016	316	cmd.exe	33
PID 1016 wrote to memory of 952	1016	rundll32.exe	35
PID 1016 wrote to memory of 952	1016	rundll32.exe	35
PID 1016 wrote to memory of 952	1016	rundll32.exe	35
PID 1016 wrote to memory of 952	1016	rundll32.exe	35

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\subscription_1618334083.xlsb
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1080
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c certutil -decode %PUBLIC%\31927.dpi %PUBLIC%\31927.pdo && rundll32 %PUBLIC%\31927.pdo,DF1
  2⤵
  - Process spawned unexpected child process
  - Suspicious use of WriteProcessMemory
  PID:316
- - C:\Windows\SysWOW64\certutil.exe
    certutil -decode C:\Users\Public\31927.dpi C:\Users\Public\31927.pdo
    3⤵
    PID:1904
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32 C:\Users\Public\31927.pdo,DF1
    3⤵
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:1016
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1016 -s 432
      4⤵
      Program crash
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of AdjustPrivilegeToken
      PID:952

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/952-73-0x0000000000600000-0x0000000000601000-memory.dmp

Filesize
4KB

Download
memory/1016-71-0x0000000000180000-0x0000000000185000-memory.dmp

Filesize
20KB

Download
memory/1080-62-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1080-61-0x0000000071A51000-0x0000000071A53000-memory.dmp

Filesize
8KB

Download
memory/1080-60-0x000000002FE31000-0x000000002FE34000-memory.dmp

Filesize
12KB

Download
memory/1904-65-0x0000000075D11000-0x0000000075D13000-memory.dmp

Filesize
8KB

Download

Analysis

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