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Analysis Report tryn.scr

Overview

General Information

Sample Name:tryn.scr (renamed file extension from scr to exe)
Analysis ID:279654
MD5:feeaeac971ff66c3dbe42c525c094110
SHA1:562b47a54f5d148b06c19d97753c423ea2ac44e6
SHA256:ca5729f310dbe0554b378b015a4b99a8fecb147b94cad061d0c275edb264f115

Most interesting Screenshot:

Detection

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

Signatures

Antivirus / Scanner detection for submitted sample
Potential malicious icon found
Yara detected GuLoader
Tries to detect virtualization through RDTSC time measurements
Yara detected VB6 Downloader Generic
Abnormal high CPU Usage
Antivirus or Machine Learning detection for unpacked file
Contains functionality for execution timing, often used to detect debuggers
Contains functionality to query CPU information (cpuid)
Contains functionality to read the PEB
PE file contains strange resources
Queries the volume information (name, serial number etc) of a device
Sample file is different than original file name gathered from version info
Uses code obfuscation techniques (call, push, ret)

Classification

Startup

  • System is w10x64
  • tryn.exe (PID: 7080 cmdline: 'C:\Users\user\Desktop\tryn.exe' MD5: FEEAEAC971FF66C3DBE42C525C094110)
  • cleanup

Malware Configuration

No configs have been found

Yara Overview

Memory Dumps

SourceRuleDescriptionAuthorStrings
Process Memory Space: tryn.exe PID: 7080JoeSecurity_VB6DownloaderGenericYara detected VB6 Downloader GenericJoe Security
    Process Memory Space: tryn.exe PID: 7080JoeSecurity_GuLoaderYara detected GuLoaderJoe Security

      Sigma Overview

      No Sigma rule has matched

      Signature Overview

      Click to jump to signature section

      Show All Signature Results

      AV Detection:

      barindex
      Antivirus / Scanner detection for submitted sampleShow sources
      Source: tryn.exeAvira: detected
      Source: 0.0.tryn.exe.400000.0.unpackAvira: Label: TR/Injector.dwmkj

      System Summary:

      barindex
      Potential malicious icon foundShow sources
      Source: initial sampleIcon embedded in PE file: bad icon match: 20047c7c70f0e004
      Source: C:\Users\user\Desktop\tryn.exeProcess Stats: CPU usage > 98%
      Source: tryn.exeStatic PE information: Resource name: RT_ICON type: GLS_BINARY_LSB_FIRST
      Source: tryn.exe, 00000000.00000002.477030901.0000000002080000.00000002.00000001.sdmpBinary or memory string: OriginalFilenameuser32j% vs tryn.exe
      Source: classification engineClassification label: mal72.rans.troj.evad.winEXE@1/0@0/0
      Source: tryn.exeStatic PE information: Section: .text IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_READ
      Source: C:\Users\user\Desktop\tryn.exeSection loaded: C:\Windows\SysWOW64\msvbvm60.dllJump to behavior
      Source: C:\Users\user\Desktop\tryn.exeKey opened: HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiersJump to behavior

      Data Obfuscation:

      barindex
      Yara detected GuLoaderShow sources
      Source: Yara matchFile source: Process Memory Space: tryn.exe PID: 7080, type: MEMORY
      Yara detected VB6 Downloader GenericShow sources
      Source: Yara matchFile source: Process Memory Space: tryn.exe PID: 7080, type: MEMORY
      Source: C:\Users\user\Desktop\tryn.exeCode function: 0_2_00404772 push eax; ret 0_2_00404773
      Source: C:\Users\user\Desktop\tryn.exeCode function: 0_2_004047DF push es; retf 0_2_004047E0
      Source: C:\Users\user\Desktop\tryn.exeCode function: 0_2_00404DF5 push 1DAF2D2Eh; ret 0_2_00404DFA
      Source: C:\Users\user\Desktop\tryn.exeCode function: 0_2_02A81EA0 push eax; retf 0_2_02A81EA2
      Source: C:\Users\user\Desktop\tryn.exeCode function: 0_2_02A80002 push esp; ret 0_2_02A8004B
      Source: C:\Users\user\Desktop\tryn.exeCode function: 0_2_02A8004C push esp; ret 0_2_02A8004B
      Source: C:\Users\user\Desktop\tryn.exeCode function: 0_2_02A8004C push edx; retf 0_2_02A8005A
      Source: C:\Users\user\Desktop\tryn.exeCode function: 0_2_02A81FA0 push eax; retf 0_2_02A81FA2
      Source: C:\Users\user\Desktop\tryn.exeProcess information set: NOOPENFILEERRORBOXJump to behavior
      Source: C:\Users\user\Desktop\tryn.exeProcess information set: NOOPENFILEERRORBOXJump to behavior
      Source: C:\Users\user\Desktop\tryn.exeProcess information set: NOOPENFILEERRORBOXJump to behavior
      Source: C:\Users\user\Desktop\tryn.exeProcess information set: NOOPENFILEERRORBOXJump to behavior
      Source: C:\Users\user\Desktop\tryn.exeProcess information set: NOOPENFILEERRORBOXJump to behavior

      Malware Analysis System Evasion:

      barindex
      Tries to detect virtualization through RDTSC time measurementsShow sources
      Source: C:\Users\user\Desktop\tryn.exeRDTSC instruction interceptor: First address: 0000000002A8262C second address: 0000000002A8262C instructions: 0x00000000 rdtsc 0x00000002 mov eax, 00000001h 0x00000007 cpuid 0x00000009 popad 0x0000000a call 00007F51F8998798h 0x0000000f lfence 0x00000012 mov edx, dword ptr [7FFE0014h] 0x00000018 lfence 0x0000001b ret 0x0000001c sub edx, esi 0x0000001e ret 0x0000001f pop ecx 0x00000020 add edi, edx 0x00000022 dec ecx 0x00000023 cmp ecx, 00000000h 0x00000026 jne 00007F51F8998781h 0x00000028 cmp ecx, edx 0x0000002a push ecx 0x0000002b call 00007F51F89987A9h 0x00000030 call 00007F51F89987AAh 0x00000035 lfence 0x00000038 mov edx, dword ptr [7FFE0014h] 0x0000003e lfence 0x00000041 ret 0x00000042 mov esi, edx 0x00000044 pushad 0x00000045 rdtsc
      Source: C:\Users\user\Desktop\tryn.exeCode function: 0_2_02A82624 rdtsc 0_2_02A82624
      Source: tryn.exeBinary or memory string: C:\Program Files\Qemu-ga\qemu-ga.exe
      Source: C:\Users\user\Desktop\tryn.exeCode function: 0_2_02A82624 rdtsc 0_2_02A82624
      Source: C:\Users\user\Desktop\tryn.exeCode function: 0_2_02A8148A mov eax, dword ptr fs:[00000030h]0_2_02A8148A
      Source: C:\Users\user\Desktop\tryn.exeCode function: 0_2_02A824EC mov eax, dword ptr fs:[00000030h]0_2_02A824EC
      Source: C:\Users\user\Desktop\tryn.exeCode function: 0_2_02A82867 mov eax, dword ptr fs:[00000030h]0_2_02A82867
      Source: C:\Users\user\Desktop\tryn.exeCode function: 0_2_02A8227C mov eax, dword ptr fs:[00000030h]0_2_02A8227C
      Source: C:\Users\user\Desktop\tryn.exeCode function: 0_2_02A80DC5 mov eax, dword ptr fs:[00000030h]0_2_02A80DC5
      Source: C:\Users\user\Desktop\tryn.exeCode function: 0_2_02A809D7 mov eax, dword ptr fs:[00000030h]0_2_02A809D7
      Source: tryn.exe, 00000000.00000002.476910378.0000000000C40000.00000002.00000001.sdmpBinary or memory string: Shell_TrayWnd
      Source: tryn.exe, 00000000.00000002.476910378.0000000000C40000.00000002.00000001.sdmpBinary or memory string: NProgram Manager
      Source: tryn.exe, 00000000.00000002.476910378.0000000000C40000.00000002.00000001.sdmpBinary or memory string: Progman
      Source: tryn.exe, 00000000.00000002.476910378.0000000000C40000.00000002.00000001.sdmpBinary or memory string: Progmanlock
      Source: C:\Users\user\Desktop\tryn.exeCode function: 0_2_02A80E7B cpuid 0_2_02A80E7B
      Source: C:\Users\user\Desktop\tryn.exeQueries volume information: C:\ VolumeInformationJump to behavior

      Mitre Att&ck Matrix

      Initial AccessExecutionPersistencePrivilege EscalationDefense EvasionCredential AccessDiscoveryLateral MovementCollectionExfiltrationCommand and ControlNetwork EffectsRemote Service EffectsImpact
      Valid AccountsWindows Management InstrumentationPath InterceptionProcess Injection1Software Packing1OS Credential DumpingSecurity Software Discovery111Remote ServicesData from Local SystemExfiltration Over Other Network MediumData ObfuscationEavesdrop on Insecure Network CommunicationRemotely Track Device Without AuthorizationModify System Partition
      Default AccountsScheduled Task/JobBoot or Logon Initialization ScriptsBoot or Logon Initialization ScriptsProcess Injection1LSASS MemoryProcess Discovery1Remote Desktop ProtocolData from Removable MediaExfiltration Over BluetoothJunk DataExploit 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 ManagerSystem Information Discovery121SMB/Windows Admin SharesData from Network Shared DriveAutomated ExfiltrationSteganographyExploit SS7 to Track Device LocationObtain Device Cloud BackupsDelete Device Data

      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.