26229a2003664a3afe9867cfaa7dd10c149bc91e49059630f8e230b2e0b5bc7a

General

Target

ApplicationReject-1221452547.xlsb
Size

1.1MB
MD5

eb6354a5ba2b6898673595c5f66782e9
SHA1

266ed4f8703e4704e8aa2997cce01ce037f07051
SHA256

ba68f78275487c646826664f394e8ca0ff58e8df4eb900939d0acbeb8001d898
SHA512

07837e7c4bc651e6fb5168b349943bb5b47c91587e1d6ff802d93d05f05a423686a58ddf21372290a4fa6d6ff733c6457cc387d8b9801292c353afd5ac5ea7a7

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

http://103.155.93.53/940375172.dat

xlm40.dropper

http://87.236.146.69/940375172.dat

xlm40.dropper

http://94.140.114.172/940375172.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	4888	4752	Regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2332	4752	Regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1628	4752	Regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3796	4752	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

4752 EXCEL.EXE

Suspicious use of SetWindowsHookEx 17 IoCs

Processes:

EXCEL.EXE

pid	process
4752	EXCEL.EXE
4752	EXCEL.EXE
4752	EXCEL.EXE
4752	EXCEL.EXE
4752	EXCEL.EXE
4752	EXCEL.EXE
4752	EXCEL.EXE
4752	EXCEL.EXE
4752	EXCEL.EXE
4752	EXCEL.EXE
4752	EXCEL.EXE
4752	EXCEL.EXE
4752	EXCEL.EXE
4752	EXCEL.EXE
4752	EXCEL.EXE
4752	EXCEL.EXE
4752	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 4752 wrote to memory of 4888	4752	EXCEL.EXE	Regsvr32.exe
PID 4752 wrote to memory of 4888	4752	EXCEL.EXE	Regsvr32.exe
PID 4752 wrote to memory of 2332	4752	EXCEL.EXE	Regsvr32.exe
PID 4752 wrote to memory of 2332	4752	EXCEL.EXE	Regsvr32.exe
PID 4752 wrote to memory of 1628	4752	EXCEL.EXE	Regsvr32.exe
PID 4752 wrote to memory of 1628	4752	EXCEL.EXE	Regsvr32.exe
PID 4752 wrote to memory of 3796	4752	EXCEL.EXE	Regsvr32.exe
PID 4752 wrote to memory of 3796	4752	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-1221452547.xlsb"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4752

C:\Windows\SYSTEM32\Regsvr32.exe
Regsvr32 /s calc
2⤵
- Process spawned unexpected child process
PID:4888

C:\Windows\SYSTEM32\Regsvr32.exe
Regsvr32 C:\Rujiky\Ubada\Vertu.ooccxx
2⤵
- Process spawned unexpected child process
PID:2332

C:\Windows\SYSTEM32\Regsvr32.exe
Regsvr32 C:\Rujiky\Ubada\Vertua.ooccxx
2⤵
- Process spawned unexpected child process
PID:1628

C:\Windows\SYSTEM32\Regsvr32.exe
Regsvr32 C:\Rujiky\Ubada\Vertub.ooccxx
2⤵
- Process spawned unexpected child process
PID:3796

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1628-139-0x0000000000000000-mapping.dmp

Download
memory/2332-138-0x0000000000000000-mapping.dmp

Download
memory/3796-140-0x0000000000000000-mapping.dmp

Download
memory/4752-130-0x00007FFC58FD0000-0x00007FFC58FE0000-memory.dmp

Filesize
64KB

Download
memory/4752-131-0x00007FFC58FD0000-0x00007FFC58FE0000-memory.dmp

Filesize
64KB

Download
memory/4752-132-0x00007FFC58FD0000-0x00007FFC58FE0000-memory.dmp

Filesize
64KB

Download
memory/4752-133-0x00007FFC58FD0000-0x00007FFC58FE0000-memory.dmp

Filesize
64KB

Download
memory/4752-134-0x00007FFC58FD0000-0x00007FFC58FE0000-memory.dmp

Filesize
64KB

Download
memory/4752-135-0x00007FFC56820000-0x00007FFC56830000-memory.dmp

Filesize
64KB

Download
memory/4752-136-0x00007FFC56820000-0x00007FFC56830000-memory.dmp

Filesize
64KB

Download
memory/4888-137-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads