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Analysis Report RFQ-PR#20211201.exe

Overview

General Information

Sample Name:RFQ-PR#20211201.exe
Analysis ID:338418
MD5:7f460fbf235c5e678b553edd2113d890
SHA1:6cda9cecf924e6e2fe967ed0ad0c1d189e41fb81
SHA256:1c9344d3993bafbe60739644d0fae336276c4ffd835da89d44b58ef4d744eee0
Tags:exeGuLoader

Most interesting Screenshot:

Detection

GuLoader
Score:80
Range:0 - 100
Whitelisted:false
Confidence:100%

Signatures

Multi AV Scanner detection for submitted file
Yara detected GuLoader
Detected RDTSC dummy instruction sequence (likely for instruction hammering)
Found potential dummy code loops (likely to delay analysis)
Potential time zone aware malware
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Yara detected VB6 Downloader Generic
Abnormal high CPU Usage
Contains functionality for execution timing, often used to detect debuggers
Contains functionality to read the PEB
PE file contains strange resources
Program does not show much activity (idle)
Sample file is different than original file name gathered from version info
Uses 32bit PE files
Uses code obfuscation techniques (call, push, ret)

Classification

Startup

  • System is w10x64
  • RFQ-PR#20211201.exe (PID: 7148 cmdline: 'C:\Users\user\Desktop\RFQ-PR#20211201.exe' MD5: 7F460FBF235C5E678B553EDD2113D890)
  • cleanup

Malware Configuration

No configs have been found

Yara Overview

Memory Dumps

SourceRuleDescriptionAuthorStrings
Process Memory Space: RFQ-PR#20211201.exe PID: 7148JoeSecurity_VB6DownloaderGenericYara detected VB6 Downloader GenericJoe Security
    Process Memory Space: RFQ-PR#20211201.exe PID: 7148JoeSecurity_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
      Multi AV Scanner detection for submitted fileShow sources
      Source: RFQ-PR#20211201.exeReversingLabs: Detection: 13%
      Source: RFQ-PR#20211201.exeStatic PE information: LOCAL_SYMS_STRIPPED, 32BIT_MACHINE, EXECUTABLE_IMAGE, LINE_NUMS_STRIPPED, RELOCS_STRIPPED
      Source: C:\Users\user\Desktop\RFQ-PR#20211201.exeProcess Stats: CPU usage > 98%
      Source: RFQ-PR#20211201.exeStatic PE information: Resource name: RT_ICON type: GLS_BINARY_LSB_FIRST
      Source: RFQ-PR#20211201.exe, 00000000.00000002.1281600855.0000000000416000.00000002.00020000.sdmpBinary or memory string: OriginalFilenameCredo8.exe vs RFQ-PR#20211201.exe
      Source: RFQ-PR#20211201.exe, 00000000.00000002.1282522380.00000000022E0000.00000002.00000001.sdmpBinary or memory string: OriginalFilenameuser32j% vs RFQ-PR#20211201.exe
      Source: RFQ-PR#20211201.exeBinary or memory string: OriginalFilenameCredo8.exe vs RFQ-PR#20211201.exe
      Source: RFQ-PR#20211201.exeStatic PE information: LOCAL_SYMS_STRIPPED, 32BIT_MACHINE, EXECUTABLE_IMAGE, LINE_NUMS_STRIPPED, RELOCS_STRIPPED
      Source: classification engineClassification label: mal80.troj.evad.winEXE@1/0@0/0
      Source: C:\Users\user\Desktop\RFQ-PR#20211201.exeFile created: C:\Users\user\AppData\Local\Temp\~DFF6B59D46F994D8A9.TMPJump to behavior
      Source: RFQ-PR#20211201.exeStatic PE information: Section: .text IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_READ
      Source: C:\Users\user\Desktop\RFQ-PR#20211201.exeSection loaded: C:\Windows\SysWOW64\msvbvm60.dllJump to behavior
      Source: C:\Users\user\Desktop\RFQ-PR#20211201.exeKey opened: HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiersJump to behavior
      Source: RFQ-PR#20211201.exeReversingLabs: Detection: 13%

      Data Obfuscation:

      barindex
      Yara detected GuLoaderShow sources
      Source: Yara matchFile source: Process Memory Space: RFQ-PR#20211201.exe PID: 7148, type: MEMORY
      Yara detected VB6 Downloader GenericShow sources
      Source: Yara matchFile source: Process Memory Space: RFQ-PR#20211201.exe PID: 7148, type: MEMORY
      Source: C:\Users\user\Desktop\RFQ-PR#20211201.exeCode function: 0_2_0040C94F push eax; iretd 0_2_0040C950
      Source: C:\Users\user\Desktop\RFQ-PR#20211201.exeCode function: 0_2_0040995D push ss; iretd 0_2_0040996F
      Source: C:\Users\user\Desktop\RFQ-PR#20211201.exeCode function: 0_2_00408123 push cs; retf 0_2_0040817B
      Source: C:\Users\user\Desktop\RFQ-PR#20211201.exeCode function: 0_2_0040C197 push esi; iretd 0_2_0040C198
      Source: C:\Users\user\Desktop\RFQ-PR#20211201.exeCode function: 0_2_0040CAD7 push eax; iretd 0_2_0040CAD8
      Source: C:\Users\user\Desktop\RFQ-PR#20211201.exeCode function: 0_2_0040D2F6 push esp; retf 0_2_0040D2F7
      Source: C:\Users\user\Desktop\RFQ-PR#20211201.exeCode function: 0_2_0040E69C push edx; iretd 0_2_0040E6BC
      Source: C:\Users\user\Desktop\RFQ-PR#20211201.exeCode function: 0_2_0040C6A8 push eax; iretd 0_2_0040C6AC
      Source: C:\Users\user\Desktop\RFQ-PR#20211201.exeCode function: 0_2_0040C6BF push eax; iretd 0_2_0040C6C0
      Source: C:\Users\user\Desktop\RFQ-PR#20211201.exeCode function: 0_2_00408370 push ds; iretd 0_2_0040838B
      Source: C:\Users\user\Desktop\RFQ-PR#20211201.exeCode function: 0_2_0040A3D3 push edx; iretd 0_2_0040A3D8
      Source: C:\Users\user\Desktop\RFQ-PR#20211201.exeCode function: 0_2_00408F97 push eax; iretd 0_2_00408F98
      Source: C:\Users\user\Desktop\RFQ-PR#20211201.exeCode function: 0_2_00404399 push ds; iretd 0_2_0040439A
      Source: C:\Users\user\Desktop\RFQ-PR#20211201.exeProcess information set: NOOPENFILEERRORBOXJump to behavior

      Malware Analysis System Evasion:

      barindex
      Detected RDTSC dummy instruction sequence (likely for instruction hammering)Show sources
      Source: C:\Users\user\Desktop\RFQ-PR#20211201.exeRDTSC instruction interceptor: First address: 000000000242601F second address: 00000000024266F7 instructions: 0x00000000 rdtsc 0x00000002 mov eax, 00000001h 0x00000007 cpuid 0x00000009 popad 0x0000000a call 00007F8358954AE1h 0x0000000f test cl, bl 0x00000011 mov eax, dword ptr fs:[00000030h] 0x00000017 cmp ah, ch 0x00000019 mov eax, dword ptr [eax+0Ch] 0x0000001c mov eax, dword ptr [eax+14h] 0x0000001f cmp edx, ecx 0x00000021 mov ecx, dword ptr [eax] 0x00000023 jmp 00007F835895453Eh 0x00000025 test ebx, D9666EB4h 0x0000002b mov eax, ecx 0x0000002d cmp cx, ax 0x00000030 jmp 00007F8358954523h 0x00000032 test ecx, ecx 0x00000034 mov ebx, dword ptr [eax+28h] 0x00000037 test ax, dx 0x0000003a cmp ebx, 00000000h 0x0000003d je 00007F835895458Dh 0x0000003f test edx, ebx 0x00000041 push ebx 0x00000042 test dx, ax 0x00000045 call 00007F835895458Eh 0x0000004a cmp dl, dl 0x0000004c mov esi, dword ptr [esp+04h] 0x00000050 pushad 0x00000051 mov eax, 000000EFh 0x00000056 rdtsc
      Potential time zone aware malwareShow sources
      Source: C:\Users\user\Desktop\RFQ-PR#20211201.exeSystem information queried: CurrentTimeZoneInformationJump to behavior
      Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)Show sources
      Source: RFQ-PR#20211201.exe, 00000000.00000002.1282690513.0000000002420000.00000040.00000001.sdmpBinary or memory string: C:\PROGRAM FILES\QEMU-GA\QEMU-GA.EXEF
      Source: RFQ-PR#20211201.exeBinary or memory string: C:\PROGRAM FILES\QEMU-GA\QEMU-GA.EXE
      Tries to detect virtualization through RDTSC time measurementsShow sources
      Source: C:\Users\user\Desktop\RFQ-PR#20211201.exeRDTSC instruction interceptor: First address: 000000000242601F second address: 00000000024266F7 instructions: 0x00000000 rdtsc 0x00000002 mov eax, 00000001h 0x00000007 cpuid 0x00000009 popad 0x0000000a call 00007F8358954AE1h 0x0000000f test cl, bl 0x00000011 mov eax, dword ptr fs:[00000030h] 0x00000017 cmp ah, ch 0x00000019 mov eax, dword ptr [eax+0Ch] 0x0000001c mov eax, dword ptr [eax+14h] 0x0000001f cmp edx, ecx 0x00000021 mov ecx, dword ptr [eax] 0x00000023 jmp 00007F835895453Eh 0x00000025 test ebx, D9666EB4h 0x0000002b mov eax, ecx 0x0000002d cmp cx, ax 0x00000030 jmp 00007F8358954523h 0x00000032 test ecx, ecx 0x00000034 mov ebx, dword ptr [eax+28h] 0x00000037 test ax, dx 0x0000003a cmp ebx, 00000000h 0x0000003d je 00007F835895458Dh 0x0000003f test edx, ebx 0x00000041 push ebx 0x00000042 test dx, ax 0x00000045 call 00007F835895458Eh 0x0000004a cmp dl, dl 0x0000004c mov esi, dword ptr [esp+04h] 0x00000050 pushad 0x00000051 mov eax, 000000EFh 0x00000056 rdtsc
      Source: C:\Users\user\Desktop\RFQ-PR#20211201.exeRDTSC instruction interceptor: First address: 0000000002426EB3 second address: 0000000002426EB3 instructions: 0x00000000 rdtsc 0x00000002 popad 0x00000003 cmp byte ptr [esi+ecx], 00000000h 0x00000007 je 00007F8358D3B01Eh 0x00000009 jmp 00007F8358D3B08Ah 0x0000000b cmp eax, ebx 0x0000000d inc ecx 0x0000000e cmp ecx, ebx 0x00000010 jnl 00007F8358D3AEF8h 0x00000016 pushad 0x00000017 mov ecx, 0000005Eh 0x0000001c rdtsc
      Source: C:\Users\user\Desktop\RFQ-PR#20211201.exeCode function: 0_2_02426A4F rdtsc 0_2_02426A4F
      Source: all processesThread injection, dropped files, key value created, disk infection and DNS query: no activity detected
      Source: RFQ-PR#20211201.exe, 00000000.00000002.1282690513.0000000002420000.00000040.00000001.sdmpBinary or memory string: C:\Program Files\Qemu-ga\qemu-ga.exef
      Source: RFQ-PR#20211201.exeBinary or memory string: C:\Program Files\Qemu-ga\qemu-ga.exe

      Anti Debugging:

      barindex
      Found potential dummy code loops (likely to delay analysis)Show sources
      Source: C:\Users\user\Desktop\RFQ-PR#20211201.exeProcess Stats: CPU usage > 90% for more than 60s
      Source: C:\Users\user\Desktop\RFQ-PR#20211201.exeCode function: 0_2_02426A4F rdtsc 0_2_02426A4F
      Source: C:\Users\user\Desktop\RFQ-PR#20211201.exeCode function: 0_2_02423763 mov eax, dword ptr fs:[00000030h]0_2_02423763
      Source: C:\Users\user\Desktop\RFQ-PR#20211201.exeCode function: 0_2_02425F91 mov eax, dword ptr fs:[00000030h]0_2_02425F91
      Source: C:\Users\user\Desktop\RFQ-PR#20211201.exeCode function: 0_2_02422857 mov eax, dword ptr fs:[00000030h]0_2_02422857
      Source: C:\Users\user\Desktop\RFQ-PR#20211201.exeCode function: 0_2_02422832 mov eax, dword ptr fs:[00000030h]0_2_02422832
      Source: C:\Users\user\Desktop\RFQ-PR#20211201.exeCode function: 0_2_024228A7 mov eax, dword ptr fs:[00000030h]0_2_024228A7
      Source: C:\Users\user\Desktop\RFQ-PR#20211201.exeCode function: 0_2_024265FA mov eax, dword ptr fs:[00000030h]0_2_024265FA
      Source: C:\Users\user\Desktop\RFQ-PR#20211201.exeCode function: 0_2_024271FC mov eax, dword ptr fs:[00000030h]0_2_024271FC
      Source: all processesThread injection, dropped files, key value created, disk infection and DNS query: no activity detected
      Source: RFQ-PR#20211201.exe, 00000000.00000002.1281974451.0000000000D70000.00000002.00000001.sdmpBinary or memory string: Shell_TrayWnd
      Source: RFQ-PR#20211201.exe, 00000000.00000002.1281974451.0000000000D70000.00000002.00000001.sdmpBinary or memory string: Progman
      Source: RFQ-PR#20211201.exe, 00000000.00000002.1281974451.0000000000D70000.00000002.00000001.sdmpBinary or memory string: &Program Manager
      Source: RFQ-PR#20211201.exe, 00000000.00000002.1281974451.0000000000D70000.00000002.00000001.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 DumpingSystem Time Discovery1Remote 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 MemorySecurity Software Discovery411Remote 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 ManagerVirtualization/Sandbox Evasion11SMB/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 PaddingNTDSProcess Discovery1Distributed Component Object ModelInput CaptureScheduled TransferProtocol ImpersonationSIM Card SwapCarrier Billing Fraud
      Cloud AccountsCronNetwork Logon ScriptNetwork Logon ScriptSoftware PackingLSA SecretsSystem Information Discovery21SSHKeyloggingData Transfer Size LimitsFallback ChannelsManipulate Device CommunicationManipulate App Store Rankings or Ratings

      Behavior Graph

      Screenshots

      Thumbnails

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