061cc686cc419c20be9207dc08cf30387e4dd3ad689f75769f15901848f4745d

General

Target

Complaint-Letter-1737783681-03102021.xls
Size

276KB
MD5

a43af9b5594cb1cfd748e6a4a33c3dc7
SHA1

8856a2c2c6975693a2ec9f603aba226596e74d55
SHA256

69c60296879563e341e1dba8da2f421893ad9697593a5deeaff3e79abb57dd9a
SHA512

d74ec67a73d4fb87cdbdf5978a7953058004f6f7dd49cc4e5dc12e5eb331388f020fc409b9b6e79056b18c2fa9262e19ab1ffe3321376798f808bac0c3b9f83d

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

http://lackenbauer.ru/bd/hhvqjrec/44266.5805623843.dat

xlm40.dropper

http://www.peacezoneacademy.com/dxsbonlv/44266.5805623843.dat

xlm40.dropper

http://jopo.com/gmaaxbro/44266.5805623843.dat

xlm40.dropper

http://www.thegivingwall.co.uk/jfgolx/44266.5805623843.dat

xlm40.dropper

http://baxtercode.com/qkhpnucmzts/44266.5805623843.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	1360	892	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1096	892	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1084	892	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1444	892	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1500	892	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\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
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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

892 EXCEL.EXE
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

892 EXCEL.EXE
892 EXCEL.EXE
892 EXCEL.EXE

pid	process
892	EXCEL.EXE

pid	process
892	EXCEL.EXE
892	EXCEL.EXE
892	EXCEL.EXE

Suspicious use of WriteProcessMemory 35 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 892 wrote to memory of 1360	892	EXCEL.EXE	rundll32.exe
PID 892 wrote to memory of 1360	892	EXCEL.EXE	rundll32.exe
PID 892 wrote to memory of 1360	892	EXCEL.EXE	rundll32.exe
PID 892 wrote to memory of 1360	892	EXCEL.EXE	rundll32.exe
PID 892 wrote to memory of 1360	892	EXCEL.EXE	rundll32.exe
PID 892 wrote to memory of 1360	892	EXCEL.EXE	rundll32.exe
PID 892 wrote to memory of 1360	892	EXCEL.EXE	rundll32.exe
PID 892 wrote to memory of 1096	892	EXCEL.EXE	rundll32.exe
PID 892 wrote to memory of 1096	892	EXCEL.EXE	rundll32.exe
PID 892 wrote to memory of 1096	892	EXCEL.EXE	rundll32.exe
PID 892 wrote to memory of 1096	892	EXCEL.EXE	rundll32.exe
PID 892 wrote to memory of 1096	892	EXCEL.EXE	rundll32.exe
PID 892 wrote to memory of 1096	892	EXCEL.EXE	rundll32.exe
PID 892 wrote to memory of 1096	892	EXCEL.EXE	rundll32.exe
PID 892 wrote to memory of 1084	892	EXCEL.EXE	rundll32.exe
PID 892 wrote to memory of 1084	892	EXCEL.EXE	rundll32.exe
PID 892 wrote to memory of 1084	892	EXCEL.EXE	rundll32.exe
PID 892 wrote to memory of 1084	892	EXCEL.EXE	rundll32.exe
PID 892 wrote to memory of 1084	892	EXCEL.EXE	rundll32.exe
PID 892 wrote to memory of 1084	892	EXCEL.EXE	rundll32.exe
PID 892 wrote to memory of 1084	892	EXCEL.EXE	rundll32.exe
PID 892 wrote to memory of 1444	892	EXCEL.EXE	rundll32.exe
PID 892 wrote to memory of 1444	892	EXCEL.EXE	rundll32.exe
PID 892 wrote to memory of 1444	892	EXCEL.EXE	rundll32.exe
PID 892 wrote to memory of 1444	892	EXCEL.EXE	rundll32.exe
PID 892 wrote to memory of 1444	892	EXCEL.EXE	rundll32.exe
PID 892 wrote to memory of 1444	892	EXCEL.EXE	rundll32.exe
PID 892 wrote to memory of 1444	892	EXCEL.EXE	rundll32.exe
PID 892 wrote to memory of 1500	892	EXCEL.EXE	rundll32.exe
PID 892 wrote to memory of 1500	892	EXCEL.EXE	rundll32.exe
PID 892 wrote to memory of 1500	892	EXCEL.EXE	rundll32.exe
PID 892 wrote to memory of 1500	892	EXCEL.EXE	rundll32.exe
PID 892 wrote to memory of 1500	892	EXCEL.EXE	rundll32.exe
PID 892 wrote to memory of 1500	892	EXCEL.EXE	rundll32.exe
PID 892 wrote to memory of 1500	892	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-1737783681-03102021.xls
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:892

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\Runtime.brok,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1360

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\Runtime.brok1,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1096

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\Runtime.brok2,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1084

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\Runtime.brok3,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1444

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\Runtime.brok4,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1500

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

C:\Users\Admin\Runtime.brok1
MD5
153665460fe2578e8dc4e36ef7077d80

SHA1
40a90b6f98c358bdbdd6e5842c186d919cdde7e3

SHA256
3ad4b3ff863a1ff41ea1e6ebb34f374a8d54804ec27b5531d05e579374bd602b

SHA512
31abced5777e4c5dd3f155fbda068ab786a57e0d24cb535d41379c471011a6ac757f2ad4802c52249b3280065c4ce31e3a7f932637d8ee37adbccdab3a2bf2f8

Download Submit
memory/892-2-0x000000002F8E1000-0x000000002F8E4000-memory.dmp

Filesize
12KB

Download
memory/892-3-0x00000000713C1000-0x00000000713C3000-memory.dmp

Filesize
8KB

Download
memory/892-4-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1084-11-0x0000000000000000-mapping.dmp

Download
memory/1096-8-0x0000000000000000-mapping.dmp

Download
memory/1360-6-0x0000000000000000-mapping.dmp

Download
memory/1360-7-0x0000000075BF1000-0x0000000075BF3000-memory.dmp

Filesize
8KB

Download
memory/1444-13-0x0000000000000000-mapping.dmp

Download
memory/1500-15-0x0000000000000000-mapping.dmp

Download
memory/2020-5-0x000007FEF74A0000-0x000007FEF771A000-memory.dmp

Filesize
2.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads