8144e99db9c3d7782ffd9a9faffb1d1821842dbbb907bdb458f2a3ae088648a1

General

Target

analysis-1808712384.xlsb
Size

142KB
MD5

e9d54291f481858ce92cfa7542db7e15
SHA1

19685ad8b987846231c1615aa2f90d74ecb1f7f4
SHA256

8d076c43b33231edb93313f5a0e311492b4c2d51888d6a6b6a42ad535f1be2d6
SHA512

559917816900aedbc9973daa529975d19db2558d74ab30102aeecf23ece4efa0263f49fdaf5f9460d0baadc38f11c5a3c8eeb1af0570e2a85be97df32e505179

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

https://phacdochuabenh.com/jJTYkIFPp6x/yy.html

xlm40.dropper

https://mobilesmsmarketing.online/1knoj4Bd3F0/yy.html

Signatures

Process spawned unexpected child process 2 IoCs

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

Processes:

regsvr32.exeregsvr32.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	2548	3628	regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4024	3628	regsvr32.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\ProcessorNameString	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	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

3628 EXCEL.EXE
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

EXCEL.EXE

pid process

3628 EXCEL.EXE
3628 EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
3628	EXCEL.EXE
3628	EXCEL.EXE
3628	EXCEL.EXE
3628	EXCEL.EXE
3628	EXCEL.EXE
3628	EXCEL.EXE
3628	EXCEL.EXE
3628	EXCEL.EXE
3628	EXCEL.EXE
3628	EXCEL.EXE
3628	EXCEL.EXE
3628	EXCEL.EXE

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 3628 wrote to memory of 2548	3628	EXCEL.EXE	regsvr32.exe
PID 3628 wrote to memory of 2548	3628	EXCEL.EXE	regsvr32.exe
PID 3628 wrote to memory of 4024	3628	EXCEL.EXE	regsvr32.exe
PID 3628 wrote to memory of 4024	3628	EXCEL.EXE	regsvr32.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\analysis-1808712384.xlsb"
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:3628

C:\Windows\SYSTEM32\regsvr32.exe
regsvr32 -s ..\vin.dll
2⤵
- Process spawned unexpected child process
PID:2548

C:\Windows\SYSTEM32\regsvr32.exe
regsvr32 -s ..\vun.dll
2⤵
- Process spawned unexpected child process
PID:4024

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

Replay Monitor

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Downloads

memory/2548-270-0x0000000000000000-mapping.dmp

Download
memory/3628-114-0x00007FF7B0880000-0x00007FF7B3E36000-memory.dmp

Filesize
53.7MB

Download
memory/3628-115-0x00007FFA892C0000-0x00007FFA892D0000-memory.dmp

Filesize
64KB

Download
memory/3628-116-0x00007FFA892C0000-0x00007FFA892D0000-memory.dmp

Filesize
64KB

Download
memory/3628-117-0x00007FFA892C0000-0x00007FFA892D0000-memory.dmp

Filesize
64KB

Download
memory/3628-118-0x00007FFA892C0000-0x00007FFA892D0000-memory.dmp

Filesize
64KB

Download
memory/3628-119-0x00007FFA892C0000-0x00007FFA892D0000-memory.dmp

Filesize
64KB

Download
memory/3628-122-0x00007FFAA9DE0000-0x00007FFAAAECE000-memory.dmp

Filesize
16.9MB

Download
memory/3628-123-0x0000028B0B3F0000-0x0000028B0D2E5000-memory.dmp

Filesize
31.0MB

Download
memory/4024-271-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads