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Windows Analysis Report
file.exe

Overview

General Information

Sample Name:file.exe
Analysis ID:791301
MD5:14e09c7a5842688842f6c0bf61c17135
SHA1:4c9e1cbcd933293268c396b3c79f3836665059a8
SHA256:a5ce2c21d3f92080a06e0aa7862303848b2661181b279a2db9b72b8f31a82702
Tags:exe
Infos:

Detection

Nymaim
Score:92
Range:0 - 100
Whitelisted:false
Confidence:100%

Signatures

Detected unpacking (overwrites its own PE header)
Yara detected Nymaim
Detected unpacking (changes PE section rights)
Multi AV Scanner detection for dropped file
Snort IDS alert for network traffic
Obfuscated command line found
Machine Learning detection for dropped file
C2 URLs / IPs found in malware configuration
Uses 32bit PE files
Antivirus or Machine Learning detection for unpacked file
Contains functionality to check if a debugger is running (IsDebuggerPresent)
Contains functionality to query locales information (e.g. system language)
Contains functionality to shutdown / reboot the system
Uses code obfuscation techniques (call, push, ret)
Found evasive API chain (date check)
PE file contains sections with non-standard names
Internet Provider seen in connection with other malware
Detected potential crypto function
Contains functionality to query CPU information (cpuid)
Found potential string decryption / allocating functions
Sample execution stops while process was sleeping (likely an evasion)
Contains functionality to check if a debugger is running (OutputDebugString,GetLastError)
Contains functionality to call native functions
Contains functionality to communicate with device drivers
Contains functionality to check if a window is minimized (may be used to check if an application is visible)
Contains functionality to dynamically determine API calls
Found dropped PE file which has not been started or loaded
Contains functionality which may be used to detect a debugger (GetProcessHeap)
PE file contains executable resources (Code or Archives)
IP address seen in connection with other malware
Enables debug privileges
Creates a DirectInput object (often for capturing keystrokes)
Sample file is different than original file name gathered from version info
Extensive use of GetProcAddress (often used to hide API calls)
Drops PE files
Contains functionality to read the PEB
Found evasive API chain checking for process token information
Contains functionality to launch a program with higher privileges
Uses taskkill to terminate processes
Dropped file seen in connection with other malware
Uses Microsoft's Enhanced Cryptographic Provider
Contains functionality to detect sandboxes (foreground window change detection)
Creates a process in suspended mode (likely to inject code)

Classification

  • System is w10x64
  • file.exe (PID: 5992 cmdline: C:\Users\user\Desktop\file.exe MD5: 14E09C7A5842688842F6C0BF61C17135)
    • file.tmp (PID: 6100 cmdline: "C:\Users\user\AppData\Local\Temp\is-HGAMR.tmp\file.tmp" /SL5="$4023C,1536639,54272,C:\Users\user\Desktop\file.exe" MD5: D76329B30DB65F61D55B20F36B56DA26)
      • finalrecovery.exe (PID: 6076 cmdline: "C:\Program Files (x86)\FgasoftFR\FinalRecovery\finalrecovery.exe" MD5: 88A9155EB9D85157634ED38D128C877B)
        • cmd.exe (PID: 4488 cmdline: "C:\Windows\System32\cmd.exe" /c taskkill /im "finalrecovery.exe" /f & erase "C:\Program Files (x86)\FgasoftFR\FinalRecovery\finalrecovery.exe" & exit MD5: F3BDBE3BB6F734E357235F4D5898582D)
          • conhost.exe (PID: 5040 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
          • taskkill.exe (PID: 5968 cmdline: taskkill /im "finalrecovery.exe" /f MD5: 15E2E0ACD891510C6268CB8899F2A1A1)
  • cleanup
{"C2 addresses": ["45.12.253.56", "45.12.253.72", "45.12.253.98", "45.12.253.75"]}
SourceRuleDescriptionAuthorStrings
00000002.00000002.323772698.0000000003250000.00000004.00001000.00020000.00000000.sdmpJoeSecurity_NymaimYara detected NymaimJoe Security
    00000002.00000002.323409231.0000000000400000.00000040.00000001.01000000.00000007.sdmpJoeSecurity_NymaimYara detected NymaimJoe Security
      SourceRuleDescriptionAuthorStrings
      2.2.finalrecovery.exe.400000.1.unpackJoeSecurity_NymaimYara detected NymaimJoe Security
        2.2.finalrecovery.exe.3250000.2.raw.unpackJoeSecurity_NymaimYara detected NymaimJoe Security
          2.2.finalrecovery.exe.3250000.2.unpackJoeSecurity_NymaimYara detected NymaimJoe Security
            2.2.finalrecovery.exe.400000.1.raw.unpackJoeSecurity_NymaimYara detected NymaimJoe Security
              No Sigma rule has matched
              Timestamp:45.12.253.72192.168.2.380497082852925 01/25/23-10:02:04.044834
              SID:2852925
              Source Port:80
              Destination Port:49708
              Protocol:TCP
              Classtype:A Network Trojan was detected

              Click to jump to signature section

              Show All Signature Results

              AV Detection

              barindex
              Source: C:\Users\user\AppData\Roaming\{e6e9dfa8-98f2-11e9-90ce-806e6f6e6963}\6tohc1clzbcir.exeReversingLabs: Detection: 60%
              Source: C:\Program Files (x86)\FgasoftFR\FinalRecovery\finalrecovery.exeJoe Sandbox ML: detected
              Source: 1.2.file.tmp.400000.0.unpackAvira: Label: TR/Dropper.Gen
              Source: 0.3.file.exe.23675c8.1.unpackAvira: Label: TR/Patched.Ren.Gen
              Source: 1.2.file.tmp.4b375c.2.unpackAvira: Label: TR/Patched.Ren.Gen
              Source: 0.3.file.exe.218b608.5.unpackAvira: Label: TR/Patched.Ren.Gen
              Source: 1.0.file.tmp.4b375c.2.unpackAvira: Label: TR/Patched.Ren.Gen
              Source: 0.2.file.exe.400000.0.unpackAvira: Label: TR/Dropper.Gen
              Source: 2.2.finalrecovery.exe.400000.1.unpackMalware Configuration Extractor: Nymaim {"C2 addresses": ["45.12.253.56", "45.12.253.72", "45.12.253.98", "45.12.253.75"]}
              Source: C:\Users\user\AppData\Local\Temp\is-HGAMR.tmp\file.tmpCode function: 1_2_0045C524 GetProcAddress,GetProcAddress,GetProcAddress,ISCryptGetVersion,1_2_0045C524
              Source: C:\Users\user\AppData\Local\Temp\is-HGAMR.tmp\file.tmpCode function: 1_2_0045C5D8 ArcFourCrypt,1_2_0045C5D8
              Source: C:\Users\user\AppData\Local\Temp\is-HGAMR.tmp\file.tmpCode function: 1_2_0045C5F0 ArcFourCrypt,1_2_0045C5F0
              Source: C:\Users\user\AppData\Local\Temp\is-HGAMR.tmp\file.tmpCode function: 1_2_10001000 ISCryptGetVersion,1_2_10001000
              Source: C:\Users\user\AppData\Local\Temp\is-HGAMR.tmp\file.tmpCode function: 1_2_10001130 ArcFourCrypt,1_2_10001130
              Source: C:\Program Files (x86)\FgasoftFR\FinalRecovery\finalrecovery.exeCode function: 2_2_00403770 CryptAcquireContextW,CryptCreateHash,_mbstowcs,CryptHashData,GetLastError,CryptDeriveKey,GetLastError,CryptReleaseContext,CryptDecrypt,CryptDestroyKey,___std_exception_copy,2_2_00403770

              Compliance

              barindex
              Source: C:\Program Files (x86)\FgasoftFR\FinalRecovery\finalrecovery.exeUnpacked PE file: 2.2.finalrecovery.exe.400000.1.unpack
              Source: file.exeStatic PE information: RELOCS_STRIPPED, EXECUTABLE_IMAGE, LINE_NUMS_STRIPPED, LOCAL_SYMS_STRIPPED, BYTES_REVERSED_LO, 32BIT_MACHINE, BYTES_REVERSED_HI