cf9d55ffc69e92292eb9a896edc0db213ea28cabcedeee6a7cf5c8e65f164fe7

General

Target

Overdue-Debt-1393058072-03042021.xls
Size

76KB
MD5

d9d1d7afc86db20f7b3b0d5e2c49eec3
SHA1

63474d3cdb01d8720280eee68beaf39406a8174a
SHA256

cf9d55ffc69e92292eb9a896edc0db213ea28cabcedeee6a7cf5c8e65f164fe7
SHA512

c26a65f55cc6d29ce5bd0224e8a598ee1671f2384f49a7fa6b3dc38ac4adc46d98ce0ae945282a0b1e121727ef6b3b7025e4688d148d7727ecf3ce5cdbd0330f

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	2468	3496	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1604	3496	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1568	3496	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3760	3496	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2864	3496	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 opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

3496 EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
3496	EXCEL.EXE
3496	EXCEL.EXE
3496	EXCEL.EXE
3496	EXCEL.EXE
3496	EXCEL.EXE
3496	EXCEL.EXE
3496	EXCEL.EXE
3496	EXCEL.EXE
3496	EXCEL.EXE
3496	EXCEL.EXE
3496	EXCEL.EXE
3496	EXCEL.EXE

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 3496 wrote to memory of 2468	3496	EXCEL.EXE	rundll32.exe
PID 3496 wrote to memory of 2468	3496	EXCEL.EXE	rundll32.exe
PID 3496 wrote to memory of 1604	3496	EXCEL.EXE	rundll32.exe
PID 3496 wrote to memory of 1604	3496	EXCEL.EXE	rundll32.exe
PID 3496 wrote to memory of 1568	3496	EXCEL.EXE	rundll32.exe
PID 3496 wrote to memory of 1568	3496	EXCEL.EXE	rundll32.exe
PID 3496 wrote to memory of 3760	3496	EXCEL.EXE	rundll32.exe
PID 3496 wrote to memory of 3760	3496	EXCEL.EXE	rundll32.exe
PID 3496 wrote to memory of 2864	3496	EXCEL.EXE	rundll32.exe
PID 3496 wrote to memory of 2864	3496	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-1393058072-03042021.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3496

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\Vijaser.lasjr,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:2468

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\Vijaser.lasjr1,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1604

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\Vijaser.lasjr2,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1568

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\Vijaser.lasjr3,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:3760

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\Vijaser.lasjr4,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:2864

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/1568-9-0x0000000000000000-mapping.dmp

Download
memory/1604-8-0x0000000000000000-mapping.dmp

Download
memory/2468-7-0x0000000000000000-mapping.dmp

Download
memory/2864-11-0x0000000000000000-mapping.dmp

Download
memory/3496-2-0x00007FF7FA740000-0x00007FF7FA750000-memory.dmp

Filesize
64KB

Download
memory/3496-3-0x00007FF7FA740000-0x00007FF7FA750000-memory.dmp

Filesize
64KB

Download
memory/3496-4-0x00007FF7FA740000-0x00007FF7FA750000-memory.dmp

Filesize
64KB

Download
memory/3496-5-0x00007FF81E280000-0x00007FF81E8B7000-memory.dmp

Filesize
6.2MB

Download
memory/3496-6-0x00007FF7FA740000-0x00007FF7FA750000-memory.dmp

Filesize
64KB

Download
memory/3760-10-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads