Malware Analysis Report

2024-10-19 06:39

Sample ID 240923-slh1nszbnj
Target cyewa.ps1
SHA256 3d641dae182ce73851fcfb842ba19ba70f0e5c2b02730fc66948cec688d3949d
Tags
execution zharkbot botnet discovery
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

3d641dae182ce73851fcfb842ba19ba70f0e5c2b02730fc66948cec688d3949d

Threat Level: Known bad

The file cyewa.ps1 was found to be: Known bad.

Malicious Activity Summary

execution zharkbot botnet discovery

Detects ZharkBot payload

ZharkBot

Blocklisted process makes network request

Legitimate hosting services abused for malware hosting/C2

Suspicious use of SetThreadContext

Command and Scripting Interpreter: PowerShell

Program crash

System Location Discovery: System Language Discovery

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-09-23 15:12

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-23 15:12

Reported

2024-09-23 15:16

Platform

win7-20240708-en

Max time kernel

120s

Max time network

121s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\cyewa.ps1

Signatures

Command and Scripting Interpreter: PowerShell

execution
Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Processes

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\cyewa.ps1

Network

N/A

Files

memory/2432-4-0x000007FEF599E000-0x000007FEF599F000-memory.dmp

memory/2432-5-0x000000001B5B0000-0x000000001B892000-memory.dmp

memory/2432-6-0x0000000002890000-0x0000000002898000-memory.dmp

memory/2432-7-0x000007FEF56E0000-0x000007FEF607D000-memory.dmp

memory/2432-8-0x000007FEF56E0000-0x000007FEF607D000-memory.dmp

memory/2432-9-0x0000000002BF0000-0x0000000002BFA000-memory.dmp

memory/2432-10-0x000007FEF56E0000-0x000007FEF607D000-memory.dmp

memory/2432-12-0x000007FEF56E0000-0x000007FEF607D000-memory.dmp

memory/2432-11-0x000007FEF56E0000-0x000007FEF607D000-memory.dmp

memory/2432-13-0x000007FEF56E0000-0x000007FEF607D000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-23 15:12

Reported

2024-09-23 15:16

Platform

win10v2004-20240802-en

Max time kernel

93s

Max time network

95s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\cyewa.ps1

Signatures

Detects ZharkBot payload

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

ZharkBot

botnet zharkbot

Blocklisted process makes network request

Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Legitimate hosting services abused for malware hosting/C2

Description Indicator Process Target
N/A pastebin.com N/A N/A
N/A pastebin.com N/A N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4068 set thread context of 4056 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

Command and Scripting Interpreter: PowerShell

execution
Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4068 wrote to memory of 804 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4068 wrote to memory of 804 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4068 wrote to memory of 804 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4068 wrote to memory of 4056 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4068 wrote to memory of 4056 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4068 wrote to memory of 4056 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4068 wrote to memory of 4056 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4068 wrote to memory of 4056 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4068 wrote to memory of 4056 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4068 wrote to memory of 4056 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4068 wrote to memory of 4056 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4068 wrote to memory of 4056 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

Processes

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\cyewa.ps1

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4056 -ip 4056

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4056 -s 584

Network

Country Destination Domain Proto
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 pastebin.com udp
US 104.20.4.235:443 pastebin.com tcp
US 8.8.8.8:53 45.56.20.217.in-addr.arpa udp
US 8.8.8.8:53 235.4.20.104.in-addr.arpa udp
US 8.8.8.8:53 136.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 56.163.245.4.in-addr.arpa udp
US 8.8.8.8:53 241.42.69.40.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 33.140.123.92.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp

Files

memory/4068-0-0x00007FFA93AE3000-0x00007FFA93AE5000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mtxjdmdc.csv.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/4068-10-0x000002B876110000-0x000002B876132000-memory.dmp

memory/4068-11-0x00007FFA93AE0000-0x00007FFA945A1000-memory.dmp

memory/4068-12-0x00007FFA93AE0000-0x00007FFA945A1000-memory.dmp

memory/4068-13-0x000002B85DC00000-0x000002B85DC0A000-memory.dmp

memory/4056-14-0x0000000000400000-0x0000000000454000-memory.dmp

memory/4056-17-0x0000000000400000-0x0000000000454000-memory.dmp

memory/4056-21-0x0000000000400000-0x0000000000454000-memory.dmp

memory/4068-19-0x00007FFA93AE0000-0x00007FFA945A1000-memory.dmp

memory/4056-18-0x0000000000400000-0x0000000000454000-memory.dmp