945f14560f3894b2b77c7467a67a674476b195859e2ee3cd69eb9d8d1fdbf53a

General

Target

Overdue-Debt-146090903-03042021.xls
Size

76KB
MD5

06b861371ff3affe08a8ab4d518a1594
SHA1

aa26cd4a22d9aa424a5a84cec8e7405f12b0e35b
SHA256

866c111a58b4ada0264f9218a44df19108d31e3684cee9461cb6f073ebeb611c
SHA512

35187ce494bbe2ef381e4ffe7f3c3e9a1dd04a74535283f8ba6869f28a53283d9aa07ba1906d7cbf4eab8d40632360a1b879902f23d4fdc080222460cc4c1137

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	3808	3116	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3500	3116	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3864	3116	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3976	3116	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	812	3116	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 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
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	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

3116 EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
3116	EXCEL.EXE
3116	EXCEL.EXE
3116	EXCEL.EXE
3116	EXCEL.EXE
3116	EXCEL.EXE
3116	EXCEL.EXE
3116	EXCEL.EXE
3116	EXCEL.EXE
3116	EXCEL.EXE
3116	EXCEL.EXE
3116	EXCEL.EXE
3116	EXCEL.EXE

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 3116 wrote to memory of 3808	3116	EXCEL.EXE	rundll32.exe
PID 3116 wrote to memory of 3808	3116	EXCEL.EXE	rundll32.exe
PID 3116 wrote to memory of 3500	3116	EXCEL.EXE	rundll32.exe
PID 3116 wrote to memory of 3500	3116	EXCEL.EXE	rundll32.exe
PID 3116 wrote to memory of 3864	3116	EXCEL.EXE	rundll32.exe
PID 3116 wrote to memory of 3864	3116	EXCEL.EXE	rundll32.exe
PID 3116 wrote to memory of 3976	3116	EXCEL.EXE	rundll32.exe
PID 3116 wrote to memory of 3976	3116	EXCEL.EXE	rundll32.exe
PID 3116 wrote to memory of 812	3116	EXCEL.EXE	rundll32.exe
PID 3116 wrote to memory of 812	3116	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-146090903-03042021.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3116

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\Vijaser.lasjr,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:3808

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\Vijaser.lasjr1,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:3500

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\Vijaser.lasjr2,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:3864

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\Vijaser.lasjr3,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:3976

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\Vijaser.lasjr4,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:812

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/812-11-0x0000000000000000-mapping.dmp

Download
memory/3116-2-0x00007FF7FC7D0000-0x00007FF7FC7E0000-memory.dmp

Filesize
64KB

Download
memory/3116-3-0x00007FF7FC7D0000-0x00007FF7FC7E0000-memory.dmp

Filesize
64KB

Download
memory/3116-4-0x00007FF7FC7D0000-0x00007FF7FC7E0000-memory.dmp

Filesize
64KB

Download
memory/3116-5-0x00007FF7FC7D0000-0x00007FF7FC7E0000-memory.dmp

Filesize
64KB

Download
memory/3116-6-0x00007FF81FAA0000-0x00007FF8200D7000-memory.dmp

Filesize
6.2MB

Download
memory/3500-8-0x0000000000000000-mapping.dmp

Download
memory/3808-7-0x0000000000000000-mapping.dmp

Download
memory/3864-9-0x0000000000000000-mapping.dmp

Download
memory/3976-10-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads