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Windows Analysis Report FACTURAS.exe

Overview

General Information

Sample Name:FACTURAS.exe
Analysis ID:527918
MD5:ab63f9ba38d9eb4f8bd57ae56a844a31
SHA1:bf1c2a15553f893ff180a307dcb5805c6e440158
SHA256:5d14499fc44a623454a0518972ba97be883b0394f16f08b4265e46ff12ebfeb3
Tags:exeguloader
Infos:

Most interesting Screenshot:

Detection

GuLoader
Score:72
Range:0 - 100
Whitelisted:false
Confidence:100%

Signatures

Found malware configuration
Multi AV Scanner detection for submitted file
Yara detected GuLoader
Found potential dummy code loops (likely to delay analysis)
C2 URLs / IPs found in malware configuration
Uses 32bit PE files
Contains functionality to call native functions
Sample file is different than original file name gathered from version info
Contains functionality to read the PEB
Program does not show much activity (idle)
Uses code obfuscation techniques (call, push, ret)
Contains functionality for execution timing, often used to detect debuggers
Abnormal high CPU Usage
Detected potential crypto function

Classification

Process Tree

  • System is w10x64
  • FACTURAS.exe (PID: 6568 cmdline: "C:\Users\user\Desktop\FACTURAS.exe" MD5: AB63F9BA38D9EB4F8BD57AE56A844A31)
  • cleanup

Malware Configuration

Threatname: GuLoader

{"Payload URL": "https://drive.google.com/uc?export=download&id="}

Yara Overview

Memory Dumps

SourceRuleDescriptionAuthorStrings
00000000.00000002.820204862.00000000020D0000.00000040.00000001.sdmpJoeSecurity_GuLoader_2Yara detected GuLoaderJoe Security

    Sigma Overview

    No Sigma rule has matched

    Jbx Signature Overview

    Click to jump to signature section

    Show All Signature Results

    AV Detection:

    barindex
    Found malware configurationShow sources
    Source: 00000000.00000002.820204862.00000000020D0000.00000040.00000001.sdmpMalware Configuration Extractor: GuLoader {"Payload URL": "https://drive.google.com/uc?export=download&id="}
    Multi AV Scanner detection for submitted fileShow sources
    Source: FACTURAS.exeReversingLabs: Detection: 15%
    Source: FACTURAS.exeStatic PE information: LOCAL_SYMS_STRIPPED, 32BIT_MACHINE, EXECUTABLE_IMAGE, LINE_NUMS_STRIPPED, RELOCS_STRIPPED

    Networking:

    barindex
    C2 URLs / IPs found in malware configurationShow sources
    Source: Malware configuration extractorURLs: https://drive.google.com/uc?export=download&id=
    Source: FACTURAS.exeStatic PE information: LOCAL_SYMS_STRIPPED, 32BIT_MACHINE, EXECUTABLE_IMAGE, LINE_NUMS_STRIPPED, RELOCS_STRIPPED
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_020DDD75 NtAllocateVirtualMemory,
    Source: FACTURAS.exe, 00000000.00000000.294184122.0000000000421000.00000002.00020000.sdmpBinary or memory string: OriginalFilenameGILDER.exe vs FACTURAS.exe
    Source: FACTURAS.exeBinary or memory string: OriginalFilenameGILDER.exe vs FACTURAS.exe
    Source: C:\Users\user\Desktop\FACTURAS.exeProcess Stats: CPU usage > 98%
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_004036BD
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_00401538
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_00401774
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_00401727
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_020E6E65
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_020DDD75
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_020D924D
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_020D924F
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_020D9331
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_020E5138
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_020D9691
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_020DD7F6
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_020D94E5
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_020D95CD
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_020E45C5
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_020E3A47
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_020DCFA2
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_020E4CA7
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_020E4DD5
    Source: FACTURAS.exeReversingLabs: Detection: 15%
    Source: C:\Users\user\Desktop\FACTURAS.exeFile created: C:\Users\user\AppData\Local\Temp\~DF26AA5308F7227456.TMPJump to behavior
    Source: FACTURAS.exeStatic PE information: Section: .text IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_READ
    Source: C:\Users\user\Desktop\FACTURAS.exeKey opened: HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiers
    Source: C:\Users\user\Desktop\FACTURAS.exeSection loaded: C:\Windows\SysWOW64\msvbvm60.dll
    Source: classification engineClassification label: mal72.troj.evad.winEXE@1/1@0/0

    Data Obfuscation:

    barindex
    Yara detected GuLoaderShow sources
    Source: Yara matchFile source: 00000000.00000002.820204862.00000000020D0000.00000040.00000001.sdmp, type: MEMORY
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_004013B4 push FFFFFFCDh; iretd
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_0040204F push FFFFFFCDh; iretd
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_004111C3 push ebp; ret
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_004051D5 push 0340104Fh; iretd
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_00403A4A push esi; retf
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_00402B0E push FFFFFFCDh; iretd
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_00404C1F push eax; ret
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_0040BCD6 push 3CF881B8h; ret
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_00413574 push 00000039h; iretd
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_0040A61E push D9EC50BBh; retf
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_0040A739 push cs; iretd
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_020DE3B0 pushad ; retf
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_020D17FB push cs; ret
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_020D4AE0 push ebp; retf
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_020D5860 push esp; retn 0004h
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_020D0E32 pushfd ; iretd
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_020D5F76 push eax; iretd
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_020D5FC1 push eax; iretd
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_020D4C41 push ebp; ret
    Source: C:\Users\user\Desktop\FACTURAS.exeProcess information set: NOOPENFILEERRORBOX
    Source: all processesThread injection, dropped files, key value created, disk infection and DNS query: no activity detected
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_0041724F rdtsc

    Anti Debugging:

    barindex
    Found potential dummy code loops (likely to delay analysis)Show sources
    Source: C:\Users\user\Desktop\FACTURAS.exeProcess Stats: CPU usage > 90% for more than 60s
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_020E5138 mov eax, dword ptr fs:[00000030h]
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_020E3589 mov eax, dword ptr fs:[00000030h]
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_020D8A51 mov eax, dword ptr fs:[00000030h]
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_020DC9F2 mov eax, dword ptr fs:[00000030h]
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_020E2C97 mov eax, dword ptr fs:[00000030h]
    Source: all processesThread injection, dropped files, key value created, disk infection and DNS query: no activity detected
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_0041724F rdtsc
    Source: C:\Users\user\Desktop\FACTURAS.exeCode function: 0_2_020E6E65 RtlAddVectoredExceptionHandler,
    Source: FACTURAS.exe, 00000000.00000002.820123754.0000000000C40000.00000002.00020000.sdmpBinary or memory string: Program Manager
    Source: FACTURAS.exe, 00000000.00000002.820123754.0000000000C40000.00000002.00020000.sdmpBinary or memory string: Shell_TrayWnd
    Source: FACTURAS.exe, 00000000.00000002.820123754.0000000000C40000.00000002.00020000.sdmpBinary or memory string: Progman
    Source: FACTURAS.exe, 00000000.00000002.820123754.0000000000C40000.00000002.00020000.sdmpBinary or memory string: Progmanlock

    Mitre Att&ck Matrix

    Initial AccessExecutionPersistencePrivilege EscalationDefense EvasionCredential AccessDiscoveryLateral MovementCollectionExfiltrationCommand and ControlNetwork EffectsRemote Service EffectsImpact
    Valid AccountsWindows Management InstrumentationPath InterceptionProcess Injection1Virtualization/Sandbox Evasion11OS Credential DumpingSecurity Software Discovery11Remote ServicesArchive Collected Data1Exfiltration Over Other Network MediumEncrypted Channel1Eavesdrop on Insecure Network CommunicationRemotely Track Device Without AuthorizationModify System Partition
    Default AccountsScheduled Task/JobBoot or Logon Initialization ScriptsBoot or Logon Initialization ScriptsProcess Injection1LSASS MemoryVirtualization/Sandbox Evasion11Remote Desktop ProtocolData from Removable MediaExfiltration Over BluetoothApplication Layer Protocol1Exploit SS7 to Redirect Phone Calls/SMSRemotely Wipe Data Without AuthorizationDevice Lockout
    Domain AccountsAt (Linux)Logon Script (Windows)Logon Script (Windows)Obfuscated Files or Information1Security Account ManagerProcess Discovery1SMB/Windows Admin SharesData from Network Shared DriveAutomated ExfiltrationSteganographyExploit SS7 to Track Device LocationObtain Device Cloud BackupsDelete Device Data
    Local AccountsAt (Windows)Logon Script (Mac)Logon Script (Mac)Binary PaddingNTDSSystem Information Discovery1Distributed Component Object ModelInput CaptureScheduled TransferProtocol ImpersonationSIM Card SwapCarrier Billing Fraud

    Behavior Graph

    Hide Legend

    Legend:

    • Process
    • Signature
    • Created File
    • DNS/IP Info
    • Is Dropped
    • Is Windows Process
    • Number of created Registry Values
    • Number of created Files
    • Visual Basic
    • Delphi
    • Java
    • .Net C# or VB.NET
    • C, C++ or other language
    • Is malicious
    • Internet

    Screenshots

    Thumbnails

    This section contains all screenshots as thumbnails, including those not shown in the slideshow.