10dcbbb94986d7078525942a32e1ce7a5994db855d91dfb6bc0af4454c275d00

General

Target

Complaint-Letter-641255205-03102021.xls
Size

281KB
MD5

e0ba5c610d3096ff98c2ff1d683b7f8e
SHA1

cf72fda2892d65a37e710de892672ba75ade3694
SHA256

f27b807a56b6166eb9ae91a78ecfbf9abba29fa83970ff81c2ae23aa67df3eae
SHA512

97597ccf03e75ddbef2e7f9b25121767dc3a8fb7346f9209cfbfc639449e05edf2832f67ec64e3e8e3e9a60fe820c22b069a39d961abe3ac4bfb579ffa3e2a17

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

http://oracledispatch.com/pijxju/44266.8774986111.dat

xlm40.dropper

http://alvaelectrical.ir/jfvrrvwxrsv/44266.8774986111.dat

xlm40.dropper

http://www.bekagayrimenkul.com/xtgudsvqubbk/44266.8774986111.dat

xlm40.dropper

http://civil-group.ir/rvnhdtkyxgu/44266.8774986111.dat

xlm40.dropper

http://kumarpropack.com/jdvcnedwvpr/44266.8774986111.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	1044	776	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	656	776	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1108	776	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1120	776	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1048	776	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
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	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
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\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
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar	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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

776 EXCEL.EXE
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

776 EXCEL.EXE
776 EXCEL.EXE
776 EXCEL.EXE

pid	process
776	EXCEL.EXE

pid	process
776	EXCEL.EXE
776	EXCEL.EXE
776	EXCEL.EXE

Suspicious use of WriteProcessMemory 35 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 776 wrote to memory of 1044	776	EXCEL.EXE	rundll32.exe
PID 776 wrote to memory of 1044	776	EXCEL.EXE	rundll32.exe
PID 776 wrote to memory of 1044	776	EXCEL.EXE	rundll32.exe
PID 776 wrote to memory of 1044	776	EXCEL.EXE	rundll32.exe
PID 776 wrote to memory of 1044	776	EXCEL.EXE	rundll32.exe
PID 776 wrote to memory of 1044	776	EXCEL.EXE	rundll32.exe
PID 776 wrote to memory of 1044	776	EXCEL.EXE	rundll32.exe
PID 776 wrote to memory of 656	776	EXCEL.EXE	rundll32.exe
PID 776 wrote to memory of 656	776	EXCEL.EXE	rundll32.exe
PID 776 wrote to memory of 656	776	EXCEL.EXE	rundll32.exe
PID 776 wrote to memory of 656	776	EXCEL.EXE	rundll32.exe
PID 776 wrote to memory of 656	776	EXCEL.EXE	rundll32.exe
PID 776 wrote to memory of 656	776	EXCEL.EXE	rundll32.exe
PID 776 wrote to memory of 656	776	EXCEL.EXE	rundll32.exe
PID 776 wrote to memory of 1108	776	EXCEL.EXE	rundll32.exe
PID 776 wrote to memory of 1108	776	EXCEL.EXE	rundll32.exe
PID 776 wrote to memory of 1108	776	EXCEL.EXE	rundll32.exe
PID 776 wrote to memory of 1108	776	EXCEL.EXE	rundll32.exe
PID 776 wrote to memory of 1108	776	EXCEL.EXE	rundll32.exe
PID 776 wrote to memory of 1108	776	EXCEL.EXE	rundll32.exe
PID 776 wrote to memory of 1108	776	EXCEL.EXE	rundll32.exe
PID 776 wrote to memory of 1120	776	EXCEL.EXE	rundll32.exe
PID 776 wrote to memory of 1120	776	EXCEL.EXE	rundll32.exe
PID 776 wrote to memory of 1120	776	EXCEL.EXE	rundll32.exe
PID 776 wrote to memory of 1120	776	EXCEL.EXE	rundll32.exe
PID 776 wrote to memory of 1120	776	EXCEL.EXE	rundll32.exe
PID 776 wrote to memory of 1120	776	EXCEL.EXE	rundll32.exe
PID 776 wrote to memory of 1120	776	EXCEL.EXE	rundll32.exe
PID 776 wrote to memory of 1048	776	EXCEL.EXE	rundll32.exe
PID 776 wrote to memory of 1048	776	EXCEL.EXE	rundll32.exe
PID 776 wrote to memory of 1048	776	EXCEL.EXE	rundll32.exe
PID 776 wrote to memory of 1048	776	EXCEL.EXE	rundll32.exe
PID 776 wrote to memory of 1048	776	EXCEL.EXE	rundll32.exe
PID 776 wrote to memory of 1048	776	EXCEL.EXE	rundll32.exe
PID 776 wrote to memory of 1048	776	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-641255205-03102021.xls
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:776

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\Runtime.brok,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1044

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\Runtime.brok1,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:656

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\Runtime.brok2,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1108

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\Runtime.brok3,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1120

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\Runtime.brok4,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1048

Network

MITRE ATT&CK Matrix ATT&CK 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

Exfiltration

Command and Control

Impact

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Downloads

memory/656-8-0x0000000000000000-mapping.dmp

Download
memory/776-2-0x000000002F051000-0x000000002F054000-memory.dmp

Filesize
12KB

Download
memory/776-3-0x0000000071371000-0x0000000071373000-memory.dmp

Filesize
8KB

Download
memory/776-4-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1044-6-0x0000000000000000-mapping.dmp

Download
memory/1044-7-0x0000000076071000-0x0000000076073000-memory.dmp

Filesize
8KB

Download
memory/1048-14-0x0000000000000000-mapping.dmp

Download
memory/1104-5-0x000007FEF6200000-0x000007FEF647A000-memory.dmp

Filesize
2.5MB

Download
memory/1108-10-0x0000000000000000-mapping.dmp

Download
memory/1120-12-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads