3cf601796519e4da293f209c8e9cf32c206b551ca74cc6e612ecbd0a485d36f1

General

Target

Complaint-Letter-1395728961-03102021.xls
Size

276KB
MD5

3ed5528ee05c783b23ac82560ffeff64
SHA1

9433fd1f21b192721e45ecd423b8b9ddc7e82a7b
SHA256

cef5d481de4228ffd8ac4483449c58babd5e389371852faa68ac83748624be36
SHA512

86223d5a921ee5447d12e97dfe984561712177450c4f8ebf711c957ca0d8850afb4ac0ed75bf2c15609a5a54f39c3436395faa92401b393f7e85ef80f9270d87

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

http://lackenbauer.ru/bd/hhvqjrec/44266.6243143519.dat

xlm40.dropper

http://www.peacezoneacademy.com/dxsbonlv/44266.6243143519.dat

xlm40.dropper

http://jopo.com/gmaaxbro/44266.6243143519.dat

xlm40.dropper

http://www.thegivingwall.co.uk/jfgolx/44266.6243143519.dat

xlm40.dropper

http://baxtercode.com/qkhpnucmzts/44266.6243143519.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	852	1020	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1468	1020	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1192	1020	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1960	1020	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	748	1020	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-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	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\E&xport to Microsoft Excel	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
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\Toolbar	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 (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
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1020 EXCEL.EXE
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

1020 EXCEL.EXE
1020 EXCEL.EXE
1020 EXCEL.EXE

pid	process
1020	EXCEL.EXE

pid	process
1020	EXCEL.EXE
1020	EXCEL.EXE
1020	EXCEL.EXE

Suspicious use of WriteProcessMemory 35 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 1020 wrote to memory of 852	1020	EXCEL.EXE	rundll32.exe
PID 1020 wrote to memory of 852	1020	EXCEL.EXE	rundll32.exe
PID 1020 wrote to memory of 852	1020	EXCEL.EXE	rundll32.exe
PID 1020 wrote to memory of 852	1020	EXCEL.EXE	rundll32.exe
PID 1020 wrote to memory of 852	1020	EXCEL.EXE	rundll32.exe
PID 1020 wrote to memory of 852	1020	EXCEL.EXE	rundll32.exe
PID 1020 wrote to memory of 852	1020	EXCEL.EXE	rundll32.exe
PID 1020 wrote to memory of 1468	1020	EXCEL.EXE	rundll32.exe
PID 1020 wrote to memory of 1468	1020	EXCEL.EXE	rundll32.exe
PID 1020 wrote to memory of 1468	1020	EXCEL.EXE	rundll32.exe
PID 1020 wrote to memory of 1468	1020	EXCEL.EXE	rundll32.exe
PID 1020 wrote to memory of 1468	1020	EXCEL.EXE	rundll32.exe
PID 1020 wrote to memory of 1468	1020	EXCEL.EXE	rundll32.exe
PID 1020 wrote to memory of 1468	1020	EXCEL.EXE	rundll32.exe
PID 1020 wrote to memory of 1192	1020	EXCEL.EXE	rundll32.exe
PID 1020 wrote to memory of 1192	1020	EXCEL.EXE	rundll32.exe
PID 1020 wrote to memory of 1192	1020	EXCEL.EXE	rundll32.exe
PID 1020 wrote to memory of 1192	1020	EXCEL.EXE	rundll32.exe
PID 1020 wrote to memory of 1192	1020	EXCEL.EXE	rundll32.exe
PID 1020 wrote to memory of 1192	1020	EXCEL.EXE	rundll32.exe
PID 1020 wrote to memory of 1192	1020	EXCEL.EXE	rundll32.exe
PID 1020 wrote to memory of 1960	1020	EXCEL.EXE	rundll32.exe
PID 1020 wrote to memory of 1960	1020	EXCEL.EXE	rundll32.exe
PID 1020 wrote to memory of 1960	1020	EXCEL.EXE	rundll32.exe
PID 1020 wrote to memory of 1960	1020	EXCEL.EXE	rundll32.exe
PID 1020 wrote to memory of 1960	1020	EXCEL.EXE	rundll32.exe
PID 1020 wrote to memory of 1960	1020	EXCEL.EXE	rundll32.exe
PID 1020 wrote to memory of 1960	1020	EXCEL.EXE	rundll32.exe
PID 1020 wrote to memory of 748	1020	EXCEL.EXE	rundll32.exe
PID 1020 wrote to memory of 748	1020	EXCEL.EXE	rundll32.exe
PID 1020 wrote to memory of 748	1020	EXCEL.EXE	rundll32.exe
PID 1020 wrote to memory of 748	1020	EXCEL.EXE	rundll32.exe
PID 1020 wrote to memory of 748	1020	EXCEL.EXE	rundll32.exe
PID 1020 wrote to memory of 748	1020	EXCEL.EXE	rundll32.exe
PID 1020 wrote to memory of 748	1020	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-1395728961-03102021.xls
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1020

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\Runtime.brok,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:852

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\Runtime.brok1,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1468

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\Runtime.brok2,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1192

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\Runtime.brok3,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1960

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\Runtime.brok4,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:748

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

Replay Monitor

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Downloads

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

SHA1
40a90b6f98c358bdbdd6e5842c186d919cdde7e3

SHA256
3ad4b3ff863a1ff41ea1e6ebb34f374a8d54804ec27b5531d05e579374bd602b

SHA512
31abced5777e4c5dd3f155fbda068ab786a57e0d24cb535d41379c471011a6ac757f2ad4802c52249b3280065c4ce31e3a7f932637d8ee37adbccdab3a2bf2f8

Download Submit
memory/748-15-0x0000000000000000-mapping.dmp

Download
memory/852-6-0x0000000000000000-mapping.dmp

Download
memory/852-7-0x00000000753E1000-0x00000000753E3000-memory.dmp

Filesize
8KB

Download
memory/1020-2-0x000000002F111000-0x000000002F114000-memory.dmp

Filesize
12KB

Download
memory/1020-3-0x0000000070DE1000-0x0000000070DE3000-memory.dmp

Filesize
8KB

Download
memory/1020-4-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1192-11-0x0000000000000000-mapping.dmp

Download
memory/1468-8-0x0000000000000000-mapping.dmp

Download
memory/1960-13-0x0000000000000000-mapping.dmp

Download
memory/2020-5-0x000007FEF5BD0000-0x000007FEF5E4A000-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