10a78acc563dfa32f45c5b0f0ad1eae80ab7e003269c65f0c214f3048fd04ca5

General

Target

ApplicationReject-345465966.xlsb
Size

1.1MB
MD5

f5bee5418f9f284303e9e811b095310b
SHA1

f6ec42fed7646cd06076079e8763cc834605c9ab
SHA256

3b3447f2dc038fd05da4650f5aae658ad62261d3c5e71134e0ce9d1ce7901e02
SHA512

c3b2befff00f83ddc9d22e8f3923e6b43cd561543d254314752bb9468e4289b62763db14208cc86a7e17207927200383e5dc87815606ce60c1560bd673cb2f9f

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

http://103.155.93.53/166737943.dat

xlm40.dropper

http://87.236.146.69/166737943.dat

xlm40.dropper

http://94.140.114.172/166737943.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	2940	4268	Regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4652	4268	Regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1788	4268	Regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1880	4268	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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

4268 EXCEL.EXE

Suspicious use of SetWindowsHookEx 17 IoCs

Processes:

EXCEL.EXE

pid	process
4268	EXCEL.EXE
4268	EXCEL.EXE
4268	EXCEL.EXE
4268	EXCEL.EXE
4268	EXCEL.EXE
4268	EXCEL.EXE
4268	EXCEL.EXE
4268	EXCEL.EXE
4268	EXCEL.EXE
4268	EXCEL.EXE
4268	EXCEL.EXE
4268	EXCEL.EXE
4268	EXCEL.EXE
4268	EXCEL.EXE
4268	EXCEL.EXE
4268	EXCEL.EXE
4268	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 4268 wrote to memory of 2940	4268	EXCEL.EXE	Regsvr32.exe
PID 4268 wrote to memory of 2940	4268	EXCEL.EXE	Regsvr32.exe
PID 4268 wrote to memory of 4652	4268	EXCEL.EXE	Regsvr32.exe
PID 4268 wrote to memory of 4652	4268	EXCEL.EXE	Regsvr32.exe
PID 4268 wrote to memory of 1788	4268	EXCEL.EXE	Regsvr32.exe
PID 4268 wrote to memory of 1788	4268	EXCEL.EXE	Regsvr32.exe
PID 4268 wrote to memory of 1880	4268	EXCEL.EXE	Regsvr32.exe
PID 4268 wrote to memory of 1880	4268	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-345465966.xlsb"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4268

C:\Windows\SYSTEM32\Regsvr32.exe
Regsvr32 /s calc
2⤵
- Process spawned unexpected child process
PID:2940

C:\Windows\SYSTEM32\Regsvr32.exe
Regsvr32 C:\Rujiky\Ubada\Vertu.ooccxx
2⤵
- Process spawned unexpected child process
PID:4652

C:\Windows\SYSTEM32\Regsvr32.exe
Regsvr32 C:\Rujiky\Ubada\Vertua.ooccxx
2⤵
- Process spawned unexpected child process
PID:1788

C:\Windows\SYSTEM32\Regsvr32.exe
Regsvr32 C:\Rujiky\Ubada\Vertub.ooccxx
2⤵
- Process spawned unexpected child process
PID:1880

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

Loading Replay Monitor...

Downloads

memory/1788-139-0x0000000000000000-mapping.dmp

Download
memory/1880-140-0x0000000000000000-mapping.dmp

Download
memory/2940-137-0x0000000000000000-mapping.dmp

Download
memory/4268-130-0x00007FFDED470000-0x00007FFDED480000-memory.dmp

Filesize
64KB

Download
memory/4268-131-0x00007FFDED470000-0x00007FFDED480000-memory.dmp

Filesize
64KB

Download
memory/4268-132-0x00007FFDED470000-0x00007FFDED480000-memory.dmp

Filesize
64KB

Download
memory/4268-133-0x00007FFDED470000-0x00007FFDED480000-memory.dmp

Filesize
64KB

Download
memory/4268-134-0x00007FFDED470000-0x00007FFDED480000-memory.dmp

Filesize
64KB

Download
memory/4268-135-0x00007FFDEADC0000-0x00007FFDEADD0000-memory.dmp

Filesize
64KB

Download
memory/4268-136-0x00007FFDEADC0000-0x00007FFDEADD0000-memory.dmp

Filesize
64KB

Download
memory/4652-138-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads