66b1c81f08c8dc54566b066c990edb24d0bdd946a503255d68ec2f66e85643db

General

Target

Overdue-Debt-839198073-03042021.xls
Size

76KB
MD5

5e35d6b84936fe6713eae86f0344b02a
SHA1

9d954d33564c160aaf759a37d4263abfceeaaa76
SHA256

66b1c81f08c8dc54566b066c990edb24d0bdd946a503255d68ec2f66e85643db
SHA512

aff6a95a03589790f02bbf6fafb6624412a01297abc072a91ddab61c8a0fb0adf060c42bb7fa807b6522711c0d2026929c20d6f77255a5eeb695c0750de4e777

Score

10^/10

Malware Config

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\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2556	1032	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	812	1032	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2536	1032	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1628	1032	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	508	1032	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\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1032 EXCEL.EXE
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

EXCEL.EXE

pid process

1032 EXCEL.EXE
1032 EXCEL.EXE

Suspicious use of SetWindowsHookEx 14 IoCs

Processes:

EXCEL.EXE

pid	process
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 1032 wrote to memory of 2556	1032	EXCEL.EXE	rundll32.exe
PID 1032 wrote to memory of 2556	1032	EXCEL.EXE	rundll32.exe
PID 1032 wrote to memory of 812	1032	EXCEL.EXE	rundll32.exe
PID 1032 wrote to memory of 812	1032	EXCEL.EXE	rundll32.exe
PID 1032 wrote to memory of 2536	1032	EXCEL.EXE	rundll32.exe
PID 1032 wrote to memory of 2536	1032	EXCEL.EXE	rundll32.exe
PID 1032 wrote to memory of 1628	1032	EXCEL.EXE	rundll32.exe
PID 1032 wrote to memory of 1628	1032	EXCEL.EXE	rundll32.exe
PID 1032 wrote to memory of 508	1032	EXCEL.EXE	rundll32.exe
PID 1032 wrote to memory of 508	1032	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\Overdue-Debt-839198073-03042021.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:1032

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\Vijaser.lasjr,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:2556

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\Vijaser.lasjr1,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:812

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\Vijaser.lasjr2,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:2536

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\Vijaser.lasjr3,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1628

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\Vijaser.lasjr4,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:508

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/508-11-0x0000000000000000-mapping.dmp

Download
memory/812-8-0x0000000000000000-mapping.dmp

Download
memory/1032-2-0x00007FFC119D0000-0x00007FFC119E0000-memory.dmp

Filesize
64KB

Download
memory/1032-3-0x00007FFC119D0000-0x00007FFC119E0000-memory.dmp

Filesize
64KB

Download
memory/1032-4-0x00007FFC119D0000-0x00007FFC119E0000-memory.dmp

Filesize
64KB

Download
memory/1032-5-0x00007FFC35440000-0x00007FFC35A77000-memory.dmp

Filesize
6.2MB

Download
memory/1032-6-0x00007FFC119D0000-0x00007FFC119E0000-memory.dmp

Filesize
64KB

Download
memory/1628-10-0x0000000000000000-mapping.dmp

Download
memory/2536-9-0x0000000000000000-mapping.dmp

Download
memory/2556-7-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads