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Windows Analysis Report
file.exe

Overview

General Information

Sample Name:file.exe
Analysis ID:715158
MD5:526fde9e61b1b4835885973331fa1616
SHA1:ebbb0c3586b8a0244585eacb44ca125ac933ad8e
SHA256:093741e4079a8092ba9d94653cb4f11c15fbe1e9ef53690e91628c61f0cc9440
Tags:exe
Infos:

Detection

Nymaim
Score:88
Range:0 - 100
Whitelisted:false
Confidence:100%

Signatures

Malicious sample detected (through community Yara rule)
Yara detected Nymaim
Antivirus detection for URL or domain
Multi AV Scanner detection for dropped file
Binary is likely a compiled AutoIt script file
Machine Learning detection for sample
May check the online IP address of the machine
C2 URLs / IPs found in malware configuration
Uses 32bit PE files
Queries the volume information (name, serial number etc) of a device
Yara signature match
One or more processes crash
May sleep (evasive loops) to hinder dynamic analysis
Detected potential crypto function
Sample execution stops while process was sleeping (likely an evasion)
JA3 SSL client fingerprint seen in connection with other malware
Found dropped PE file which has not been started or loaded
PE file contains executable resources (Code or Archives)
IP address seen in connection with other malware
Downloads executable code via HTTP
Enables debug privileges
Drops files with a non-matching file extension (content does not match file extension)
Sample file is different than original file name gathered from version info
Drops PE files
Uses a known web browser user agent for HTTP communication
Checks if the current process is being debugged
Binary contains a suspicious time stamp
Uses taskkill to terminate processes
Dropped file seen in connection with other malware
Creates a process in suspended mode (likely to inject code)

Classification

  • System is w10x64
  • file.exe (PID: 3196 cmdline: C:\Users\user\Desktop\file.exe MD5: 526FDE9E61B1B4835885973331FA1616)
    • WerFault.exe (PID: 4088 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 3196 -s 528 MD5: 9E2B8ACAD48ECCA55C0230D63623661B)
    • WerFault.exe (PID: 1364 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 3196 -s 700 MD5: 9E2B8ACAD48ECCA55C0230D63623661B)
    • WerFault.exe (PID: 6080 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 3196 -s 724 MD5: 9E2B8ACAD48ECCA55C0230D63623661B)
    • WerFault.exe (PID: 6064 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 3196 -s 760 MD5: 9E2B8ACAD48ECCA55C0230D63623661B)
    • WerFault.exe (PID: 5216 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 3196 -s 768 MD5: 9E2B8ACAD48ECCA55C0230D63623661B)
    • WerFault.exe (PID: 4072 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 3196 -s 848 MD5: 9E2B8ACAD48ECCA55C0230D63623661B)
    • WerFault.exe (PID: 2008 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 3196 -s 840 MD5: 9E2B8ACAD48ECCA55C0230D63623661B)
    • WerFault.exe (PID: 6036 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 3196 -s 1032 MD5: 9E2B8ACAD48ECCA55C0230D63623661B)
    • WerFault.exe (PID: 5204 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 3196 -s 1292 MD5: 9E2B8ACAD48ECCA55C0230D63623661B)
    • cmd.exe (PID: 5760 cmdline: C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\user\AppData\Local\Temp\6clvSx8en71SUl1hUuzQ6n56lWM0\Cleaner.exe MD5: F3BDBE3BB6F734E357235F4D5898582D)
      • conhost.exe (PID: 4744 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
      • Cleaner.exe (PID: 5208 cmdline: "C:\Users\user\AppData\Local\Temp\6clvSx8en71SUl1hUuzQ6n56lWM0\Cleaner.exe" MD5: 04514BD4962F7D60679434E0EBE49184)
    • WerFault.exe (PID: 3608 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 3196 -s 1552 MD5: 9E2B8ACAD48ECCA55C0230D63623661B)
    • cmd.exe (PID: 1388 cmdline: "C:\Windows\System32\cmd.exe" /c taskkill /im "file.exe" /f & erase "C:\Users\user\Desktop\file.exe" & exit MD5: F3BDBE3BB6F734E357235F4D5898582D)
      • conhost.exe (PID: 4392 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
      • taskkill.exe (PID: 2324 cmdline: taskkill /im "file.exe" /f MD5: 15E2E0ACD891510C6268CB8899F2A1A1)
  • cleanup
{"C2 addresses": ["208.67.104.97", "85.31.46.167"]}
SourceRuleDescriptionAuthorStrings
00000000.00000000.309205181.00000000021C0000.00000040.00001000.00020000.00000000.sdmpJoeSecurity_NymaimYara detected NymaimJoe Security
    00000000.00000000.309205181.00000000021C0000.00000040.00001000.00020000.00000000.sdmpWindows_Trojan_Smokeloader_3687686funknownunknown
    • 0x30d:$a: 0C 8B 45 F0 89 45 C8 8B 45 C8 8B 40 3C 8B 4D F0 8D 44 01 04 89
    00000000.00000000.324269337.00000000021C0000.00000040.00001000.00020000.00000000.sdmpJoeSecurity_NymaimYara detected NymaimJoe Security
      00000000.00000000.324269337.00000000021C0000.00000040.00001000.00020000.00000000.sdmpWindows_Trojan_Smokeloader_3687686funknownunknown
      • 0x30d:$a: 0C 8B 45 F0 89 45 C8 8B 45 C8 8B 40 3C 8B 4D F0 8D 44 01 04 89
      00000000.00000000.303645653.00000000021C0000.00000040.00001000.00020000.00000000.sdmpJoeSecurity_NymaimYara detected NymaimJoe Security
        Click to see the 60 entries
        SourceRuleDescriptionAuthorStrings
        0.0.file.exe.400000.5.unpackJoeSecurity_NymaimYara detected NymaimJoe Security
          0.0.file.exe.21c0e67.20.raw.unpackJoeSecurity_NymaimYara detected NymaimJoe Security
            0.0.file.exe.21c0e67.26.raw.unpackJoeSecurity_NymaimYara detected NymaimJoe Security
              0.0.file.exe.400000.23.unpackJoeSecurity_NymaimYara detected NymaimJoe Security
                0.0.file.exe.21c0e67.14.raw.unpackJoeSecurity_NymaimYara detected NymaimJoe Security