ae42bb2d724005457d2b2ab54907b1915be43b1f37e83d3b40ac70e3fd9d56db

General

Target

CompensationClaim_1766595879_03122021.xls
Size

280KB
MD5

bd2906aba947ef99d09ca923cd74b525
SHA1

d1c18d825a31dd8133d64959557df934d042d583
SHA256

ae42bb2d724005457d2b2ab54907b1915be43b1f37e83d3b40ac70e3fd9d56db
SHA512

fe63b2349ff124fb9f01ba805b482c4216b2de5e73ab204dd535a5280ba4fd0a92d362492703b0a61b1486b11d6cee8f99ed654701f5563024548eaf245da6c7

Score

10^/10

Malware Config

Signatures

Process spawned unexpected child process 3 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

Processes:

rundll32.exerundll32.exerundll32.exe

description	pid	pid_target	process	target process
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	956	1192	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2584	1192	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	976	1192	rundll32.exe	EXCEL.EXE

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

EXCEL.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

EXCEL.EXE

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1192 EXCEL.EXE
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

EXCEL.EXE

pid process

1192 EXCEL.EXE
1192 EXCEL.EXE

Suspicious use of SetWindowsHookEx 14 IoCs

Processes:

EXCEL.EXE

pid	process
1192	EXCEL.EXE
1192	EXCEL.EXE
1192	EXCEL.EXE
1192	EXCEL.EXE
1192	EXCEL.EXE
1192	EXCEL.EXE
1192	EXCEL.EXE
1192	EXCEL.EXE
1192	EXCEL.EXE
1192	EXCEL.EXE
1192	EXCEL.EXE
1192	EXCEL.EXE
1192	EXCEL.EXE
1192	EXCEL.EXE

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 1192 wrote to memory of 956	1192	EXCEL.EXE	rundll32.exe
PID 1192 wrote to memory of 956	1192	EXCEL.EXE	rundll32.exe
PID 1192 wrote to memory of 2584	1192	EXCEL.EXE	rundll32.exe
PID 1192 wrote to memory of 2584	1192	EXCEL.EXE	rundll32.exe
PID 1192 wrote to memory of 976	1192	EXCEL.EXE	rundll32.exe
PID 1192 wrote to memory of 976	1192	EXCEL.EXE	rundll32.exe

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\CompensationClaim_1766595879_03122021.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1192

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\Runtim.broks,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:956

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\Runtim.broks1,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:2584

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\Runtim.broks2,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:976

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/956-7-0x0000000000000000-mapping.dmp

Download
memory/976-9-0x0000000000000000-mapping.dmp

Download
memory/1192-2-0x00007FFC444D0000-0x00007FFC444E0000-memory.dmp

Filesize
64KB

Download
memory/1192-3-0x00007FFC444D0000-0x00007FFC444E0000-memory.dmp

Filesize
64KB

Download
memory/1192-4-0x00007FFC444D0000-0x00007FFC444E0000-memory.dmp

Filesize
64KB

Download
memory/1192-5-0x00007FFC68AA0000-0x00007FFC690D7000-memory.dmp

Filesize
6.2MB

Download
memory/1192-6-0x00007FFC444D0000-0x00007FFC444E0000-memory.dmp

Filesize
64KB

Download
memory/2584-8-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads