1803f9390c070076b7c4eb751ab74160cbe5eacaeb2f69f4a0b0ba765bc5c110

General

Target

ApplicationReject-706073812.xlsb
Size

1.1MB
MD5

82eefe190e22d87e535c9dc375fe039e
SHA1

6b2e5804508f58cfcfa76eca249e11f025490d77
SHA256

9b14898f42362545794c7400c889d19cc6df0bc8536414b5a13772185d1d2be3
SHA512

14d0f9ef03435ddca7be4c23b0d83c3d61ab81cb7860a925af3d2c0aa9701cb29c06f1ff71bc0e8b8ef49667504af5d743fd24770106d3c6f4cb2f1dc12522a1

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

http://103.155.93.53/75369921.dat

xlm40.dropper

http://87.236.146.69/75369921.dat

xlm40.dropper

http://94.140.114.172/75369921.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	4720	4780	Regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	5068	4780	Regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4560	4780	Regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2404	4780	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

4780 EXCEL.EXE

Suspicious use of SetWindowsHookEx 18 IoCs

Processes:

EXCEL.EXE

pid	process
4780	EXCEL.EXE
4780	EXCEL.EXE
4780	EXCEL.EXE
4780	EXCEL.EXE
4780	EXCEL.EXE
4780	EXCEL.EXE
4780	EXCEL.EXE
4780	EXCEL.EXE
4780	EXCEL.EXE
4780	EXCEL.EXE
4780	EXCEL.EXE
4780	EXCEL.EXE
4780	EXCEL.EXE
4780	EXCEL.EXE
4780	EXCEL.EXE
4780	EXCEL.EXE
4780	EXCEL.EXE
4780	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 4780 wrote to memory of 4720	4780	EXCEL.EXE	Regsvr32.exe
PID 4780 wrote to memory of 4720	4780	EXCEL.EXE	Regsvr32.exe
PID 4780 wrote to memory of 5068	4780	EXCEL.EXE	Regsvr32.exe
PID 4780 wrote to memory of 5068	4780	EXCEL.EXE	Regsvr32.exe
PID 4780 wrote to memory of 4560	4780	EXCEL.EXE	Regsvr32.exe
PID 4780 wrote to memory of 4560	4780	EXCEL.EXE	Regsvr32.exe
PID 4780 wrote to memory of 2404	4780	EXCEL.EXE	Regsvr32.exe
PID 4780 wrote to memory of 2404	4780	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-706073812.xlsb"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4780

C:\Windows\SYSTEM32\Regsvr32.exe
Regsvr32 /s calc
2⤵
- Process spawned unexpected child process
PID:4720

C:\Windows\SYSTEM32\Regsvr32.exe
Regsvr32 C:\Rujiky\Ubada\Vertu.ooccxx
2⤵
- Process spawned unexpected child process
PID:5068

C:\Windows\SYSTEM32\Regsvr32.exe
Regsvr32 C:\Rujiky\Ubada\Vertua.ooccxx
2⤵
- Process spawned unexpected child process
PID:4560

C:\Windows\SYSTEM32\Regsvr32.exe
Regsvr32 C:\Rujiky\Ubada\Vertub.ooccxx
2⤵
- Process spawned unexpected child process
PID:2404

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/2404-140-0x0000000000000000-mapping.dmp

Download
memory/4560-139-0x0000000000000000-mapping.dmp

Download
memory/4720-137-0x0000000000000000-mapping.dmp

Download
memory/4780-130-0x00007FF9ED310000-0x00007FF9ED320000-memory.dmp

Filesize
64KB

Download
memory/4780-131-0x00007FF9ED310000-0x00007FF9ED320000-memory.dmp

Filesize
64KB

Download
memory/4780-132-0x00007FF9ED310000-0x00007FF9ED320000-memory.dmp

Filesize
64KB

Download
memory/4780-133-0x00007FF9ED310000-0x00007FF9ED320000-memory.dmp

Filesize
64KB

Download
memory/4780-134-0x00007FF9ED310000-0x00007FF9ED320000-memory.dmp

Filesize
64KB

Download
memory/4780-135-0x00007FF9EA9B0000-0x00007FF9EA9C0000-memory.dmp

Filesize
64KB

Download
memory/4780-136-0x00007FF9EA9B0000-0x00007FF9EA9C0000-memory.dmp

Filesize
64KB

Download
memory/5068-138-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads