2ffd1509850cf768d637d3da537d5f11f3d34acba4ed6a054b8e4639d37f0d8f

General

Target

ApplicationReject-681355419.xlsb
Size

1.1MB
MD5

62736c880f50fa96565168ebb3c9be70
SHA1

5d0f19d92a66fb1f4d90a8a927991dcc3fea5b33
SHA256

e649eef4ab53117e90490fe7fb0427e5d3e28c265e66b7ce51cdf54c990e0b89
SHA512

bfd731038afb74bb84409b7cba3def97388e90a13a2d4d2a2a3e44255b89bf3ded5351e86ca3fa0e4a1bd96d659d63c9b821e28507b94bfcf2511d3fd1254582

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

http://103.155.93.53/629256193.dat

xlm40.dropper

http://87.236.146.69/629256193.dat

xlm40.dropper

http://94.140.114.172/629256193.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	968	2932	Regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2860	2932	Regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4348	2932	Regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2444	2932	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

2932 EXCEL.EXE

Suspicious use of SetWindowsHookEx 17 IoCs

Processes:

EXCEL.EXE

pid	process
2932	EXCEL.EXE
2932	EXCEL.EXE
2932	EXCEL.EXE
2932	EXCEL.EXE
2932	EXCEL.EXE
2932	EXCEL.EXE
2932	EXCEL.EXE
2932	EXCEL.EXE
2932	EXCEL.EXE
2932	EXCEL.EXE
2932	EXCEL.EXE
2932	EXCEL.EXE
2932	EXCEL.EXE
2932	EXCEL.EXE
2932	EXCEL.EXE
2932	EXCEL.EXE
2932	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 2932 wrote to memory of 968	2932	EXCEL.EXE	Regsvr32.exe
PID 2932 wrote to memory of 968	2932	EXCEL.EXE	Regsvr32.exe
PID 2932 wrote to memory of 2860	2932	EXCEL.EXE	Regsvr32.exe
PID 2932 wrote to memory of 2860	2932	EXCEL.EXE	Regsvr32.exe
PID 2932 wrote to memory of 4348	2932	EXCEL.EXE	Regsvr32.exe
PID 2932 wrote to memory of 4348	2932	EXCEL.EXE	Regsvr32.exe
PID 2932 wrote to memory of 2444	2932	EXCEL.EXE	Regsvr32.exe
PID 2932 wrote to memory of 2444	2932	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-681355419.xlsb"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2932

C:\Windows\SYSTEM32\Regsvr32.exe
Regsvr32 /s calc
2⤵
- Process spawned unexpected child process
PID:968

C:\Windows\SYSTEM32\Regsvr32.exe
Regsvr32 C:\Rujiky\Ubada\Vertu.ooccxx
2⤵
- Process spawned unexpected child process
PID:2860

C:\Windows\SYSTEM32\Regsvr32.exe
Regsvr32 C:\Rujiky\Ubada\Vertua.ooccxx
2⤵
- Process spawned unexpected child process
PID:4348

C:\Windows\SYSTEM32\Regsvr32.exe
Regsvr32 C:\Rujiky\Ubada\Vertub.ooccxx
2⤵
- Process spawned unexpected child process
PID:2444

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/968-137-0x0000000000000000-mapping.dmp

Download
memory/2444-140-0x0000000000000000-mapping.dmp

Download
memory/2860-138-0x0000000000000000-mapping.dmp

Download
memory/2932-130-0x00007FFE8B410000-0x00007FFE8B420000-memory.dmp

Filesize
64KB

Download
memory/2932-131-0x00007FFE8B410000-0x00007FFE8B420000-memory.dmp

Filesize
64KB

Download
memory/2932-132-0x00007FFE8B410000-0x00007FFE8B420000-memory.dmp

Filesize
64KB

Download
memory/2932-133-0x00007FFE8B410000-0x00007FFE8B420000-memory.dmp

Filesize
64KB

Download
memory/2932-134-0x00007FFE8B410000-0x00007FFE8B420000-memory.dmp

Filesize
64KB

Download
memory/2932-135-0x00007FFE88F30000-0x00007FFE88F40000-memory.dmp

Filesize
64KB

Download
memory/2932-136-0x00007FFE88F30000-0x00007FFE88F40000-memory.dmp

Filesize
64KB

Download
memory/4348-139-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads