Behavioral Report

Analysis

max time kernel
155s
max time network
140s
platform
windows10_x64
resource
win10-20220310-en
submitted
14-03-2022 20:16

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Report Files Registry Network Processes Mutex Misc

General

Target

8e586a928eecac9fa5b4dd6980915389f0092c6ec968ffe90dc4ccf3504ae578.xlsm
Size

48KB
MD5

1655267f2eef17c7bea81ee6cf65fbf9
SHA1

dd062a715bd8eee2b8b4d30e6786e5b108b63c1a
SHA256

8e586a928eecac9fa5b4dd6980915389f0092c6ec968ffe90dc4ccf3504ae578
SHA512

3b0f05743a81756ef75e8da15e393f40365c71d7e986141bfb467acd8a232581cc5bd01953ed61b6129652ebd9517b1282f01fbbe2e808aa70dc3c906bbb726d

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

http://www.arkpp.com/ARIS-BSU/9K1/

Signatures

Process spawned unexpected child process 1 IoCs

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

Processes:

regsvr32.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	3136	2472	regsvr32.exe	EXCEL.EXE

Downloads MZ/PE file

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

TTPs:

Query Registry System Information Discovery

Processes:

EXCEL.EXE

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

TTPs:

Query Registry System Information Discovery

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

2472 EXCEL.EXE
Suspicious use of SetWindowsHookEx 9 IoCs

Processes:

EXCEL.EXE

pid process

2472 EXCEL.EXE
2472 EXCEL.EXE
2472 EXCEL.EXE
2472 EXCEL.EXE
2472 EXCEL.EXE
2472 EXCEL.EXE
2472 EXCEL.EXE
2472 EXCEL.EXE
2472 EXCEL.EXE

pid	process
2472	EXCEL.EXE

pid	process
2472	EXCEL.EXE
2472	EXCEL.EXE
2472	EXCEL.EXE
2472	EXCEL.EXE
2472	EXCEL.EXE
2472	EXCEL.EXE
2472	EXCEL.EXE
2472	EXCEL.EXE
2472	EXCEL.EXE

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 2472 wrote to memory of 3136	2472	EXCEL.EXE	regsvr32.exe
PID 2472 wrote to memory of 3136	2472	EXCEL.EXE	regsvr32.exe
PID 2472 wrote to memory of 3136	2472	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\8e586a928eecac9fa5b4dd6980915389f0092c6ec968ffe90dc4ccf3504ae578.xlsm"

Checks processor information in registry
Enumerates system info in registry
Suspicious behavior: AddClipboardFormatListener
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory

PID:2472

C:\Windows\SysWow64\regsvr32.exe

C:\Windows\SysWow64\regsvr32.exe -s ..\fbd.dll

Process spawned unexpected child process

PID:3136

Network

MITRE ATT&CK Matrix

Collection

Command and Control

Credential Access

Defense Evasion

Discovery

Query Registry

T1012

System Information Discovery

T1082

Execution

Exfiltration

Impact

Initial Access

Lateral Movement

Persistence

Privilege Escalation

Replay Monitor

00:00 00:00

Downloads

memory/2472-118-0x00007FFB7EB50000-0x00007FFB7EB60000-memory.dmp

Filesize
64KB

Download
memory/2472-119-0x00007FFB7EB50000-0x00007FFB7EB60000-memory.dmp

Filesize
64KB

Download
memory/2472-120-0x00007FFB7EB50000-0x00007FFB7EB60000-memory.dmp

Filesize
64KB

Download
memory/2472-121-0x00007FFB7EB50000-0x00007FFB7EB60000-memory.dmp

Filesize
64KB

Download
memory/2472-122-0x00007FFBBEAC0000-0x00007FFBBEC9B000-memory.dmp

Filesize
1MB

Download
memory/2472-123-0x00007FFBBCA90000-0x00007FFBBCB3E000-memory.dmp

Filesize
696KB

Download