Malware Analysis Report

2025-05-28 17:38

Sample ID 221218-jcyv4aah85
Target a533eeaaec1a873d84936633e153dd0a.exe
SHA256 3f6c84150d51188f54330ce514518c879705052abad3f89325e9c279f1d9403e
Tags
systembc trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

3f6c84150d51188f54330ce514518c879705052abad3f89325e9c279f1d9403e

Threat Level: Known bad

The file a533eeaaec1a873d84936633e153dd0a.exe was found to be: Known bad.

Malicious Activity Summary

systembc trojan

SystemBC

Executes dropped EXE

Drops file in Windows directory

Program crash

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2022-12-18 07:32

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-12-18 07:32

Reported

2022-12-18 07:34

Platform

win7-20220812-en

Max time kernel

74s

Max time network

99s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a533eeaaec1a873d84936633e153dd0a.exe"

Signatures

SystemBC

trojan systembc

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\ProgramData\deaih\mdtuu.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\Tasks\mdtuu.job C:\Users\Admin\AppData\Local\Temp\a533eeaaec1a873d84936633e153dd0a.exe N/A
File opened for modification C:\Windows\Tasks\mdtuu.job C:\Users\Admin\AppData\Local\Temp\a533eeaaec1a873d84936633e153dd0a.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a533eeaaec1a873d84936633e153dd0a.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1972 wrote to memory of 1936 N/A C:\Windows\system32\taskeng.exe C:\ProgramData\deaih\mdtuu.exe
PID 1972 wrote to memory of 1936 N/A C:\Windows\system32\taskeng.exe C:\ProgramData\deaih\mdtuu.exe
PID 1972 wrote to memory of 1936 N/A C:\Windows\system32\taskeng.exe C:\ProgramData\deaih\mdtuu.exe
PID 1972 wrote to memory of 1936 N/A C:\Windows\system32\taskeng.exe C:\ProgramData\deaih\mdtuu.exe

Processes

C:\Users\Admin\AppData\Local\Temp\a533eeaaec1a873d84936633e153dd0a.exe

"C:\Users\Admin\AppData\Local\Temp\a533eeaaec1a873d84936633e153dd0a.exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {C6314DC9-671F-4E9C-AA5A-86015217C5F1} S-1-5-18:NT AUTHORITY\System:Service:

C:\ProgramData\deaih\mdtuu.exe

C:\ProgramData\deaih\mdtuu.exe start

Network

Country Destination Domain Proto
N/A 109.205.214.18:443 tcp

Files

memory/1132-54-0x0000000075931000-0x0000000075933000-memory.dmp

memory/1132-55-0x000000000056B000-0x0000000000581000-memory.dmp

memory/1132-56-0x0000000000220000-0x0000000000229000-memory.dmp

memory/1132-57-0x0000000000400000-0x0000000000458000-memory.dmp

C:\ProgramData\deaih\mdtuu.exe

MD5 a533eeaaec1a873d84936633e153dd0a
SHA1 a16f84c4039ddccf9960cee21cb8860f2f1cf34c
SHA256 3f6c84150d51188f54330ce514518c879705052abad3f89325e9c279f1d9403e
SHA512 c599ec24478794dbe3fd1f3124bb93423b610a5d36eb76d625a2401fcc5f368ee40bca9585ba156a06747c593bc415369ae2106ee48b94044a72a59bd1949b79

C:\ProgramData\deaih\mdtuu.exe

MD5 a533eeaaec1a873d84936633e153dd0a
SHA1 a16f84c4039ddccf9960cee21cb8860f2f1cf34c
SHA256 3f6c84150d51188f54330ce514518c879705052abad3f89325e9c279f1d9403e
SHA512 c599ec24478794dbe3fd1f3124bb93423b610a5d36eb76d625a2401fcc5f368ee40bca9585ba156a06747c593bc415369ae2106ee48b94044a72a59bd1949b79

memory/1936-59-0x0000000000000000-mapping.dmp

memory/1132-61-0x000000000056B000-0x0000000000581000-memory.dmp

memory/1936-63-0x000000000028B000-0x00000000002A1000-memory.dmp

memory/1936-64-0x0000000000400000-0x0000000000458000-memory.dmp

memory/1936-65-0x000000000028B000-0x00000000002A1000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-12-18 07:32

Reported

2022-12-18 07:34

Platform

win10v2004-20220812-en

Max time kernel

91s

Max time network

110s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a533eeaaec1a873d84936633e153dd0a.exe"

Signatures

SystemBC

trojan systembc

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\ProgramData\thsco\ihvxb.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\Tasks\ihvxb.job C:\Users\Admin\AppData\Local\Temp\a533eeaaec1a873d84936633e153dd0a.exe N/A
File opened for modification C:\Windows\Tasks\ihvxb.job C:\Users\Admin\AppData\Local\Temp\a533eeaaec1a873d84936633e153dd0a.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a533eeaaec1a873d84936633e153dd0a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\a533eeaaec1a873d84936633e153dd0a.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\a533eeaaec1a873d84936633e153dd0a.exe

"C:\Users\Admin\AppData\Local\Temp\a533eeaaec1a873d84936633e153dd0a.exe"

C:\ProgramData\thsco\ihvxb.exe

C:\ProgramData\thsco\ihvxb.exe start

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 3916 -ip 3916

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3916 -s 960

Network

Country Destination Domain Proto
N/A 109.205.214.18:443 tcp
N/A 104.46.162.226:443 tcp
N/A 67.24.171.254:80 tcp
N/A 67.24.171.254:80 tcp
N/A 67.24.171.254:80 tcp

Files

memory/3916-132-0x00000000007C8000-0x00000000007DE000-memory.dmp

memory/3916-133-0x00000000005A0000-0x00000000005A9000-memory.dmp

memory/3916-134-0x0000000000400000-0x0000000000458000-memory.dmp

memory/3916-135-0x00000000007C8000-0x00000000007DE000-memory.dmp

memory/3916-136-0x00000000005A0000-0x00000000005A9000-memory.dmp

C:\ProgramData\thsco\ihvxb.exe

MD5 a533eeaaec1a873d84936633e153dd0a
SHA1 a16f84c4039ddccf9960cee21cb8860f2f1cf34c
SHA256 3f6c84150d51188f54330ce514518c879705052abad3f89325e9c279f1d9403e
SHA512 c599ec24478794dbe3fd1f3124bb93423b610a5d36eb76d625a2401fcc5f368ee40bca9585ba156a06747c593bc415369ae2106ee48b94044a72a59bd1949b79

C:\ProgramData\thsco\ihvxb.exe

MD5 a533eeaaec1a873d84936633e153dd0a
SHA1 a16f84c4039ddccf9960cee21cb8860f2f1cf34c
SHA256 3f6c84150d51188f54330ce514518c879705052abad3f89325e9c279f1d9403e
SHA512 c599ec24478794dbe3fd1f3124bb93423b610a5d36eb76d625a2401fcc5f368ee40bca9585ba156a06747c593bc415369ae2106ee48b94044a72a59bd1949b79

memory/3100-139-0x0000000000612000-0x0000000000628000-memory.dmp

memory/3100-140-0x0000000000400000-0x0000000000458000-memory.dmp

memory/3916-141-0x00000000007C8000-0x00000000007DE000-memory.dmp

memory/3916-142-0x0000000000400000-0x0000000000458000-memory.dmp