8294db28f303c0aee034ad4b6570513f3f5b6271509794863f8c6ac2131e5d84

Reason

Machine shutdown

General

Target

Complaint-Letter-894971806-03102021.xls
Size

276KB
MD5

76f89d2530ceef9b477515c3ca7e01d8
SHA1

6e64aba14a07728d7bcd7ac322eb5ca3a1e4fb5a
SHA256

8294db28f303c0aee034ad4b6570513f3f5b6271509794863f8c6ac2131e5d84
SHA512

4eebf28ab019234381383f64dfd59ecab53219836e2272a39e063e7e4f86bcab306aacc4184ce6e804bbaf9bbd08ddb8288990536062b3a013e23a290453e255

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

http://vasprogramer.com/xcuaqrfwpaf/44266.8606236111.dat

xlm40.dropper

http://mboard.baydevelopments.com/tkihlgt/44266.8606236111.dat

xlm40.dropper

http://porcarabanchel.es/kgbpstokjetx/44266.8606236111.dat

xlm40.dropper

http://klickprints.com/jcqywmbz/44266.8606236111.dat

xlm40.dropper

http://werkplaats1.okker.nl/jiejgtgde/44266.8606236111.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	976	1152	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1056	1152	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	852	1152	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	324	1152	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	468	1152	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\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\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
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
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 (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	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
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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1152 EXCEL.EXE

pid	process
1152	EXCEL.EXE

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

AUDIODG.EXE

description	pid	process
Token: 33	1792	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	1792	AUDIODG.EXE
Token: 33	1792	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	1792	AUDIODG.EXE

Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

1152 EXCEL.EXE
1152 EXCEL.EXE
1152 EXCEL.EXE

pid	process
1152	EXCEL.EXE
1152	EXCEL.EXE
1152	EXCEL.EXE

Suspicious use of WriteProcessMemory 35 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 1152 wrote to memory of 976	1152	EXCEL.EXE	rundll32.exe
PID 1152 wrote to memory of 976	1152	EXCEL.EXE	rundll32.exe
PID 1152 wrote to memory of 976	1152	EXCEL.EXE	rundll32.exe
PID 1152 wrote to memory of 976	1152	EXCEL.EXE	rundll32.exe
PID 1152 wrote to memory of 976	1152	EXCEL.EXE	rundll32.exe
PID 1152 wrote to memory of 976	1152	EXCEL.EXE	rundll32.exe
PID 1152 wrote to memory of 976	1152	EXCEL.EXE	rundll32.exe
PID 1152 wrote to memory of 1056	1152	EXCEL.EXE	rundll32.exe
PID 1152 wrote to memory of 1056	1152	EXCEL.EXE	rundll32.exe
PID 1152 wrote to memory of 1056	1152	EXCEL.EXE	rundll32.exe
PID 1152 wrote to memory of 1056	1152	EXCEL.EXE	rundll32.exe
PID 1152 wrote to memory of 1056	1152	EXCEL.EXE	rundll32.exe
PID 1152 wrote to memory of 1056	1152	EXCEL.EXE	rundll32.exe
PID 1152 wrote to memory of 1056	1152	EXCEL.EXE	rundll32.exe
PID 1152 wrote to memory of 852	1152	EXCEL.EXE	rundll32.exe
PID 1152 wrote to memory of 852	1152	EXCEL.EXE	rundll32.exe
PID 1152 wrote to memory of 852	1152	EXCEL.EXE	rundll32.exe
PID 1152 wrote to memory of 852	1152	EXCEL.EXE	rundll32.exe
PID 1152 wrote to memory of 852	1152	EXCEL.EXE	rundll32.exe
PID 1152 wrote to memory of 852	1152	EXCEL.EXE	rundll32.exe
PID 1152 wrote to memory of 852	1152	EXCEL.EXE	rundll32.exe
PID 1152 wrote to memory of 324	1152	EXCEL.EXE	rundll32.exe
PID 1152 wrote to memory of 324	1152	EXCEL.EXE	rundll32.exe
PID 1152 wrote to memory of 324	1152	EXCEL.EXE	rundll32.exe
PID 1152 wrote to memory of 324	1152	EXCEL.EXE	rundll32.exe
PID 1152 wrote to memory of 324	1152	EXCEL.EXE	rundll32.exe
PID 1152 wrote to memory of 324	1152	EXCEL.EXE	rundll32.exe
PID 1152 wrote to memory of 324	1152	EXCEL.EXE	rundll32.exe
PID 1152 wrote to memory of 468	1152	EXCEL.EXE	rundll32.exe
PID 1152 wrote to memory of 468	1152	EXCEL.EXE	rundll32.exe
PID 1152 wrote to memory of 468	1152	EXCEL.EXE	rundll32.exe
PID 1152 wrote to memory of 468	1152	EXCEL.EXE	rundll32.exe
PID 1152 wrote to memory of 468	1152	EXCEL.EXE	rundll32.exe
PID 1152 wrote to memory of 468	1152	EXCEL.EXE	rundll32.exe
PID 1152 wrote to memory of 468	1152	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-894971806-03102021.xls
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1152

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\Runtime.brok,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:976

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\Runtime.brok1,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1056

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\Runtime.brok2,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:852

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\Runtime.brok3,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:324

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\Runtime.brok4,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:468

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x0
1⤵
PID:1804

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x5bc
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1792

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x1
1⤵
PID:2016

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.brok3
MD5
507c882f74f91b75c1564075376eb794

SHA1
099e7b5c2f14c58793520eccb3c495bfed0ebe67

SHA256
c601e25a289eebd33d754a6fc4e978656f77e2f0d35a3b79afe7f658007839fe

SHA512
4f7c4cc750bbe8d76d9cfe6fb021cadb5a2e0eec3d4072e5f418fcc65380a09e7607e58d8aecc7c154eaccae16c6133f7878e7015eafc8759a9b6ff92abd9cce

Download Submit
memory/324-12-0x0000000000000000-mapping.dmp

Download
memory/468-15-0x0000000000000000-mapping.dmp

Download
memory/852-10-0x0000000000000000-mapping.dmp

Download
memory/976-6-0x0000000000000000-mapping.dmp

Download
memory/976-7-0x00000000760C1000-0x00000000760C3000-memory.dmp

Filesize
8KB

Download
memory/1056-8-0x0000000000000000-mapping.dmp

Download
memory/1152-2-0x000000002F4F1000-0x000000002F4F4000-memory.dmp

Filesize
12KB

Download
memory/1152-4-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1152-3-0x0000000071191000-0x0000000071193000-memory.dmp

Filesize
8KB

Download
memory/1152-17-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1556-5-0x000007FEF6010000-0x000007FEF628A000-memory.dmp

Filesize
2.5MB

Download
memory/1804-18-0x000007FEFB991000-0x000007FEFB993000-memory.dmp

Filesize
8KB

Download
memory/1804-19-0x00000000027C0000-0x00000000027C1000-memory.dmp

Filesize
4KB

Download
memory/2016-21-0x00000000026A0000-0x00000000026A1000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

Errors

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads