Malware Analysis Report

2024-10-18 22:30

Sample ID 240925-1bc1nsydnj
Target acc5fe0088037ddc055f9286380c56583effa1186afe9d08caea3e197b2643fd
SHA256 acc5fe0088037ddc055f9286380c56583effa1186afe9d08caea3e197b2643fd
Tags
zloader 17/03 botnet discovery persistence trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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

acc5fe0088037ddc055f9286380c56583effa1186afe9d08caea3e197b2643fd

Threat Level: Known bad

The file acc5fe0088037ddc055f9286380c56583effa1186afe9d08caea3e197b2643fd was found to be: Known bad.

Malicious Activity Summary

zloader 17/03 botnet discovery persistence trojan

Zloader, Terdot, DELoader, ZeusSphinx

Adds Run key to start application

Suspicious use of SetThreadContext

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-09-25 21:28

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-25 21:28

Reported

2024-09-25 21:30

Platform

win7-20240708-en

Max time kernel

118s

Max time network

120s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\acc5fe0088037ddc055f9286380c56583effa1186afe9d08caea3e197b2643fd.dll,#1

Signatures

Zloader, Terdot, DELoader, ZeusSphinx

trojan botnet zloader

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Windows\CurrentVersion\Run\Ufhu = "rundll32.exe C:\\Users\\Admin\\AppData\\Roaming\\Toixpi\\arluo.dll,DllRegisterServer" C:\Windows\SysWOW64\msiexec.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2040 set thread context of 2812 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\msiexec.exe

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\msiexec.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeSecurityPrivilege N/A C:\Windows\SysWOW64\msiexec.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\SysWOW64\msiexec.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1952 wrote to memory of 2040 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1952 wrote to memory of 2040 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1952 wrote to memory of 2040 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1952 wrote to memory of 2040 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1952 wrote to memory of 2040 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1952 wrote to memory of 2040 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1952 wrote to memory of 2040 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2040 wrote to memory of 2812 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\msiexec.exe
PID 2040 wrote to memory of 2812 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\msiexec.exe
PID 2040 wrote to memory of 2812 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\msiexec.exe
PID 2040 wrote to memory of 2812 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\msiexec.exe
PID 2040 wrote to memory of 2812 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\msiexec.exe
PID 2040 wrote to memory of 2812 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\msiexec.exe
PID 2040 wrote to memory of 2812 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\msiexec.exe
PID 2040 wrote to memory of 2812 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\msiexec.exe
PID 2040 wrote to memory of 2812 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\msiexec.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\acc5fe0088037ddc055f9286380c56583effa1186afe9d08caea3e197b2643fd.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\acc5fe0088037ddc055f9286380c56583effa1186afe9d08caea3e197b2643fd.dll,#1

C:\Windows\SysWOW64\msiexec.exe

msiexec.exe

Network

N/A

Files

memory/2040-0-0x0000000000270000-0x000000000034A000-memory.dmp

memory/2040-2-0x0000000000270000-0x000000000034A000-memory.dmp

memory/2040-1-0x00000000002BF000-0x00000000002C2000-memory.dmp

memory/2040-3-0x0000000000270000-0x000000000034A000-memory.dmp

memory/2040-4-0x0000000000270000-0x000000000034A000-memory.dmp

memory/2812-6-0x00000000000D0000-0x0000000000101000-memory.dmp

memory/2812-8-0x0000000000110000-0x0000000000111000-memory.dmp

memory/2812-10-0x00000000000D0000-0x0000000000101000-memory.dmp

memory/2040-12-0x0000000000270000-0x000000000034A000-memory.dmp

memory/2812-13-0x00000000000D0000-0x0000000000101000-memory.dmp

memory/2812-15-0x00000000000D0000-0x0000000000101000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-25 21:28

Reported

2024-09-25 21:30

Platform

win10v2004-20240802-en

Max time kernel

95s

Max time network

127s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\acc5fe0088037ddc055f9286380c56583effa1186afe9d08caea3e197b2643fd.dll,#1

Signatures

Zloader, Terdot, DELoader, ZeusSphinx

trojan botnet zloader

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Poode = "rundll32.exe C:\\Users\\Admin\\AppData\\Roaming\\Ytamy\\sioqr.dll,DllRegisterServer" C:\Windows\SysWOW64\msiexec.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3576 set thread context of 1512 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\msiexec.exe

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\msiexec.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeSecurityPrivilege N/A C:\Windows\SysWOW64\msiexec.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\SysWOW64\msiexec.exe N/A

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\acc5fe0088037ddc055f9286380c56583effa1186afe9d08caea3e197b2643fd.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\acc5fe0088037ddc055f9286380c56583effa1186afe9d08caea3e197b2643fd.dll,#1

C:\Windows\SysWOW64\msiexec.exe

msiexec.exe

Network

Country Destination Domain Proto
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 75.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 110.11.19.2.in-addr.arpa udp
US 8.8.8.8:53 98.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp

Files

memory/3576-0-0x0000000002240000-0x000000000231A000-memory.dmp

memory/3576-1-0x000000000228F000-0x0000000002292000-memory.dmp

memory/3576-2-0x0000000002240000-0x000000000231A000-memory.dmp

memory/3576-3-0x0000000002240000-0x000000000231A000-memory.dmp

memory/3576-4-0x0000000002240000-0x000000000231A000-memory.dmp

memory/3576-5-0x000000000228F000-0x0000000002292000-memory.dmp

memory/1512-8-0x00000000012F0000-0x0000000001321000-memory.dmp

memory/3576-10-0x0000000002240000-0x000000000231A000-memory.dmp