4ce84c7097fafe010daa73dda77ff17662086505e23b8d4bd11692c9d47896df

General

Target

Complaint-Letter-1839904529-03102021.xls
Size

276KB
MD5

d1b22a745d5efffef5c52928b7f439d6
SHA1

ba3a1a876978ebdb2a631f644a6b686fafc3c7a3
SHA256

4ce84c7097fafe010daa73dda77ff17662086505e23b8d4bd11692c9d47896df
SHA512

0cd10c652a13d1c73da064896e145a7fcc8773cad9e098678bfbe9be7543a81e7b616cd74826d78ebd36ec5842bd27c580c15d5a36109209a26402716a9242ff

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

http://lackenbauer.ru/bd/hhvqjrec/44265.6933299768.dat

xlm40.dropper

http://www.peacezoneacademy.com/dxsbonlv/44265.6933299768.dat

xlm40.dropper

http://jopo.com/gmaaxbro/44265.6933299768.dat

xlm40.dropper

http://www.thegivingwall.co.uk/jfgolx/44265.6933299768.dat

xlm40.dropper

http://baxtercode.com/qkhpnucmzts/44265.6933299768.dat

Signatures

Process spawned unexpected child process 5 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

Processes:

rundll32.exerundll32.exerundll32.exerundll32.exerundll32.exe

description	pid	pid_target	process	target process
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	616	292	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1348	292	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1664	292	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	844	292	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	520	292	rundll32.exe	EXCEL.EXE

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry
T1012

System Information Discovery
T1082

Processes:

EXCEL.EXE

description ioc process

Key opened \REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor EXCEL.EXE

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

Processes:

EXCEL.EXE

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\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-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

292 EXCEL.EXE
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

292 EXCEL.EXE
292 EXCEL.EXE
292 EXCEL.EXE

pid	process
292	EXCEL.EXE

pid	process
292	EXCEL.EXE
292	EXCEL.EXE
292	EXCEL.EXE

Suspicious use of WriteProcessMemory 35 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 292 wrote to memory of 616	292	EXCEL.EXE	rundll32.exe
PID 292 wrote to memory of 616	292	EXCEL.EXE	rundll32.exe
PID 292 wrote to memory of 616	292	EXCEL.EXE	rundll32.exe
PID 292 wrote to memory of 616	292	EXCEL.EXE	rundll32.exe
PID 292 wrote to memory of 616	292	EXCEL.EXE	rundll32.exe
PID 292 wrote to memory of 616	292	EXCEL.EXE	rundll32.exe
PID 292 wrote to memory of 616	292	EXCEL.EXE	rundll32.exe
PID 292 wrote to memory of 1348	292	EXCEL.EXE	rundll32.exe
PID 292 wrote to memory of 1348	292	EXCEL.EXE	rundll32.exe
PID 292 wrote to memory of 1348	292	EXCEL.EXE	rundll32.exe
PID 292 wrote to memory of 1348	292	EXCEL.EXE	rundll32.exe
PID 292 wrote to memory of 1348	292	EXCEL.EXE	rundll32.exe
PID 292 wrote to memory of 1348	292	EXCEL.EXE	rundll32.exe
PID 292 wrote to memory of 1348	292	EXCEL.EXE	rundll32.exe
PID 292 wrote to memory of 1664	292	EXCEL.EXE	rundll32.exe
PID 292 wrote to memory of 1664	292	EXCEL.EXE	rundll32.exe
PID 292 wrote to memory of 1664	292	EXCEL.EXE	rundll32.exe
PID 292 wrote to memory of 1664	292	EXCEL.EXE	rundll32.exe
PID 292 wrote to memory of 1664	292	EXCEL.EXE	rundll32.exe
PID 292 wrote to memory of 1664	292	EXCEL.EXE	rundll32.exe
PID 292 wrote to memory of 1664	292	EXCEL.EXE	rundll32.exe
PID 292 wrote to memory of 844	292	EXCEL.EXE	rundll32.exe
PID 292 wrote to memory of 844	292	EXCEL.EXE	rundll32.exe
PID 292 wrote to memory of 844	292	EXCEL.EXE	rundll32.exe
PID 292 wrote to memory of 844	292	EXCEL.EXE	rundll32.exe
PID 292 wrote to memory of 844	292	EXCEL.EXE	rundll32.exe
PID 292 wrote to memory of 844	292	EXCEL.EXE	rundll32.exe
PID 292 wrote to memory of 844	292	EXCEL.EXE	rundll32.exe
PID 292 wrote to memory of 520	292	EXCEL.EXE	rundll32.exe
PID 292 wrote to memory of 520	292	EXCEL.EXE	rundll32.exe
PID 292 wrote to memory of 520	292	EXCEL.EXE	rundll32.exe
PID 292 wrote to memory of 520	292	EXCEL.EXE	rundll32.exe
PID 292 wrote to memory of 520	292	EXCEL.EXE	rundll32.exe
PID 292 wrote to memory of 520	292	EXCEL.EXE	rundll32.exe
PID 292 wrote to memory of 520	292	EXCEL.EXE	rundll32.exe

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\Complaint-Letter-1839904529-03102021.xls
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:292
- C:\Windows\SysWOW64\rundll32.exe
  rundll32 ..\Runtime.brok,DllRegisterServer
  2⤵
  - Process spawned unexpected child process
  PID:616
- C:\Windows\SysWOW64\rundll32.exe
  rundll32 ..\Runtime.brok1,DllRegisterServer
  2⤵
  - Process spawned unexpected child process
  PID:1348
- C:\Windows\SysWOW64\rundll32.exe
  rundll32 ..\Runtime.brok2,DllRegisterServer
  2⤵
  - Process spawned unexpected child process
  PID:1664
- C:\Windows\SysWOW64\rundll32.exe
  rundll32 ..\Runtime.brok3,DllRegisterServer
  2⤵
  - Process spawned unexpected child process
  PID:844
- C:\Windows\SysWOW64\rundll32.exe
  rundll32 ..\Runtime.brok4,DllRegisterServer
  2⤵
  - Process spawned unexpected child process
  PID:520

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

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Downloads

memory/292-2-0x000000002F1B1000-0x000000002F1B4000-memory.dmp

Filesize
12KB

Download
memory/292-3-0x0000000071CE1000-0x0000000071CE3000-memory.dmp

Filesize
8KB

Download
memory/292-4-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/520-14-0x0000000000000000-mapping.dmp

Download
memory/616-6-0x0000000000000000-mapping.dmp

Download
memory/616-7-0x0000000076861000-0x0000000076863000-memory.dmp

Filesize
8KB

Download
memory/844-12-0x0000000000000000-mapping.dmp

Download
memory/1348-8-0x0000000000000000-mapping.dmp

Download
memory/1664-10-0x0000000000000000-mapping.dmp

Download
memory/1796-5-0x000007FEF6B80000-0x000007FEF6DFA000-memory.dmp

Filesize
2.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads