09e6b46502c94b3cb5d7b8dd9c9dcda29f2d140488d8c09415ea9b0c6b484019

General

Target

Complaint-Letter-569691619-03102021.xls
Size

276KB
MD5

f05457b10a928c0a84211af6dd3a535e
SHA1

6cf3b1e91afeb5bf54f466a38bc3a8fc24b66b19
SHA256

dd357107e0c6c37da4aa8a5db0a555f904ad2d02851e31c60dea5fc1e7194981
SHA512

6684de7baa4419f5c848921d36340a753e6a1e3ed7235fadf3b2c0bb5164396f6315b6524e7095be431fa2927b0f7f53c5d99557e973415ffbc4bce30a70aa5e

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

http://lackenbauer.ru/bd/hhvqjrec/44266.9139181713.dat

xlm40.dropper

http://www.peacezoneacademy.com/dxsbonlv/44266.9139181713.dat

xlm40.dropper

http://jopo.com/gmaaxbro/44266.9139181713.dat

xlm40.dropper

http://www.thegivingwall.co.uk/jfgolx/44266.9139181713.dat

xlm40.dropper

http://baxtercode.com/qkhpnucmzts/44266.9139181713.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	340	528	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	924	528	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	608	528	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1152	528	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1516	528	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-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\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-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

528 EXCEL.EXE
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

EXCEL.EXE

pid process

528 EXCEL.EXE
528 EXCEL.EXE
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

528 EXCEL.EXE
528 EXCEL.EXE
528 EXCEL.EXE

pid	process
528	EXCEL.EXE

pid	process
528	EXCEL.EXE
528	EXCEL.EXE

pid	process
528	EXCEL.EXE
528	EXCEL.EXE
528	EXCEL.EXE

Suspicious use of WriteProcessMemory 35 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 528 wrote to memory of 340	528	EXCEL.EXE	rundll32.exe
PID 528 wrote to memory of 340	528	EXCEL.EXE	rundll32.exe
PID 528 wrote to memory of 340	528	EXCEL.EXE	rundll32.exe
PID 528 wrote to memory of 340	528	EXCEL.EXE	rundll32.exe
PID 528 wrote to memory of 340	528	EXCEL.EXE	rundll32.exe
PID 528 wrote to memory of 340	528	EXCEL.EXE	rundll32.exe
PID 528 wrote to memory of 340	528	EXCEL.EXE	rundll32.exe
PID 528 wrote to memory of 924	528	EXCEL.EXE	rundll32.exe
PID 528 wrote to memory of 924	528	EXCEL.EXE	rundll32.exe
PID 528 wrote to memory of 924	528	EXCEL.EXE	rundll32.exe
PID 528 wrote to memory of 924	528	EXCEL.EXE	rundll32.exe
PID 528 wrote to memory of 924	528	EXCEL.EXE	rundll32.exe
PID 528 wrote to memory of 924	528	EXCEL.EXE	rundll32.exe
PID 528 wrote to memory of 924	528	EXCEL.EXE	rundll32.exe
PID 528 wrote to memory of 608	528	EXCEL.EXE	rundll32.exe
PID 528 wrote to memory of 608	528	EXCEL.EXE	rundll32.exe
PID 528 wrote to memory of 608	528	EXCEL.EXE	rundll32.exe
PID 528 wrote to memory of 608	528	EXCEL.EXE	rundll32.exe
PID 528 wrote to memory of 608	528	EXCEL.EXE	rundll32.exe
PID 528 wrote to memory of 608	528	EXCEL.EXE	rundll32.exe
PID 528 wrote to memory of 608	528	EXCEL.EXE	rundll32.exe
PID 528 wrote to memory of 1152	528	EXCEL.EXE	rundll32.exe
PID 528 wrote to memory of 1152	528	EXCEL.EXE	rundll32.exe
PID 528 wrote to memory of 1152	528	EXCEL.EXE	rundll32.exe
PID 528 wrote to memory of 1152	528	EXCEL.EXE	rundll32.exe
PID 528 wrote to memory of 1152	528	EXCEL.EXE	rundll32.exe
PID 528 wrote to memory of 1152	528	EXCEL.EXE	rundll32.exe
PID 528 wrote to memory of 1152	528	EXCEL.EXE	rundll32.exe
PID 528 wrote to memory of 1516	528	EXCEL.EXE	rundll32.exe
PID 528 wrote to memory of 1516	528	EXCEL.EXE	rundll32.exe
PID 528 wrote to memory of 1516	528	EXCEL.EXE	rundll32.exe
PID 528 wrote to memory of 1516	528	EXCEL.EXE	rundll32.exe
PID 528 wrote to memory of 1516	528	EXCEL.EXE	rundll32.exe
PID 528 wrote to memory of 1516	528	EXCEL.EXE	rundll32.exe
PID 528 wrote to memory of 1516	528	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-569691619-03102021.xls
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:528

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\Runtime.brok,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:340

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\Runtime.brok1,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:924

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\Runtime.brok2,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:608

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\Runtime.brok3,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1152

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\Runtime.brok4,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1516

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/340-6-0x0000000000000000-mapping.dmp

Download
memory/340-7-0x0000000075D01000-0x0000000075D03000-memory.dmp

Filesize
8KB

Download
memory/528-2-0x000000002FFD1000-0x000000002FFD4000-memory.dmp

Filesize
12KB

Download
memory/528-3-0x0000000071C01000-0x0000000071C03000-memory.dmp

Filesize
8KB

Download
memory/528-4-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/608-11-0x0000000000000000-mapping.dmp

Download
memory/924-8-0x0000000000000000-mapping.dmp

Download
memory/1152-13-0x0000000000000000-mapping.dmp

Download
memory/1200-5-0x000007FEF7D40000-0x000007FEF7FBA000-memory.dmp

Filesize
2.5MB

Download
memory/1516-15-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads