40109888b539c37eb369390ab7ef7a81a3d87645437b99ebfcdec6782db50574

General

Target

ApplicationReject-1773557087.xlsb
Size

1.1MB
MD5

f1927a7d1e63859b19e049598eb873fa
SHA1

e6ddc97fa849b992bcfc0ec13f996b71f1465785
SHA256

667862c78c0376538a1d92695a944dd95b2a78f12a80326371a3ddeaf7a57bf4
SHA512

2f1519d03ab74bc0cc229c81d6c5f26312225aa0b6fc6a922ff13e7b798636c475dc44663343f6a392c976ec044cc91ac9e53fea15379b8b5a55c350d01fa117

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

http://103.155.93.53/880481323.dat

xlm40.dropper

http://87.236.146.69/880481323.dat

xlm40.dropper

http://94.140.114.172/880481323.dat

Signatures

Process spawned unexpected child process 4 IoCs

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

Processes:

Regsvr32.exeRegsvr32.exeRegsvr32.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	2388	1040	Regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1484	1040	Regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1776	1040	Regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2244	1040	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 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

1040 EXCEL.EXE

Suspicious use of SetWindowsHookEx 16 IoCs

Processes:

EXCEL.EXE

pid	process
1040	EXCEL.EXE
1040	EXCEL.EXE
1040	EXCEL.EXE
1040	EXCEL.EXE
1040	EXCEL.EXE
1040	EXCEL.EXE
1040	EXCEL.EXE
1040	EXCEL.EXE
1040	EXCEL.EXE
1040	EXCEL.EXE
1040	EXCEL.EXE
1040	EXCEL.EXE
1040	EXCEL.EXE
1040	EXCEL.EXE
1040	EXCEL.EXE
1040	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 1040 wrote to memory of 2388	1040	EXCEL.EXE	Regsvr32.exe
PID 1040 wrote to memory of 2388	1040	EXCEL.EXE	Regsvr32.exe
PID 1040 wrote to memory of 1484	1040	EXCEL.EXE	Regsvr32.exe
PID 1040 wrote to memory of 1484	1040	EXCEL.EXE	Regsvr32.exe
PID 1040 wrote to memory of 1776	1040	EXCEL.EXE	Regsvr32.exe
PID 1040 wrote to memory of 1776	1040	EXCEL.EXE	Regsvr32.exe
PID 1040 wrote to memory of 2244	1040	EXCEL.EXE	Regsvr32.exe
PID 1040 wrote to memory of 2244	1040	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\ApplicationReject-1773557087.xlsb"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1040

C:\Windows\SYSTEM32\Regsvr32.exe
Regsvr32 /s calc
2⤵
- Process spawned unexpected child process
PID:2388

C:\Windows\SYSTEM32\Regsvr32.exe
Regsvr32 C:\Rujiky\Ubada\Vertu.ooccxx
2⤵
- Process spawned unexpected child process
PID:1484

C:\Windows\SYSTEM32\Regsvr32.exe
Regsvr32 C:\Rujiky\Ubada\Vertua.ooccxx
2⤵
- Process spawned unexpected child process
PID:1776

C:\Windows\SYSTEM32\Regsvr32.exe
Regsvr32 C:\Rujiky\Ubada\Vertub.ooccxx
2⤵
- Process spawned unexpected child process
PID:2244

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/1040-130-0x00007FFE0D5D0000-0x00007FFE0D5E0000-memory.dmp

Filesize
64KB

Download
memory/1040-131-0x00007FFE0D5D0000-0x00007FFE0D5E0000-memory.dmp

Filesize
64KB

Download
memory/1040-132-0x00007FFE0D5D0000-0x00007FFE0D5E0000-memory.dmp

Filesize
64KB

Download
memory/1040-133-0x00007FFE0D5D0000-0x00007FFE0D5E0000-memory.dmp

Filesize
64KB

Download
memory/1040-134-0x00007FFE0D5D0000-0x00007FFE0D5E0000-memory.dmp

Filesize
64KB

Download
memory/1040-135-0x00007FFE0AC70000-0x00007FFE0AC80000-memory.dmp

Filesize
64KB

Download
memory/1040-136-0x00007FFE0AC70000-0x00007FFE0AC80000-memory.dmp

Filesize
64KB

Download
memory/1484-138-0x0000000000000000-mapping.dmp

Download
memory/1776-139-0x0000000000000000-mapping.dmp

Download
memory/2244-140-0x0000000000000000-mapping.dmp

Download
memory/2388-137-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads