Joe Sandbox Cloud Basic Analysis Report

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Windows Analysis Report
file.exe

Overview

General Information

Sample Name:file.exe
Analysis ID:753419
MD5:3b97fd1136b9ed348734e5ea77aaa75a
SHA1:fa3e9db1c2f462cf41d43487f0f73be6615876ba
SHA256:dbcb891f6ed1d7aca11dd0263d68b3ce082d2e7eca152a098981307da9a6cc24
Tags:exe
Infos:

Detection

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

Signatures

Detected unpacking (overwrites its own PE header)
Yara detected Nymaim
Detected unpacking (changes PE section rights)
Antivirus detection for URL or domain
Multi AV Scanner detection for dropped file
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)
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 check if a window is minimized (may be used to check if an application is visible)
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)
PE file does not import any functions
Sample file is different than original file name gathered from version info
Drops PE files
Contains functionality to read the PEB
Found evasive API chain checking for process token information
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

Process Tree

  • System is w10x64
  • file.exe (PID: 2144 cmdline: C:\Users\user\Desktop\file.exe MD5: 3B97FD1136B9ED348734E5EA77AAA75A)
    • is-8PA5U.tmp (PID: 244 cmdline: "C:\Users\user\AppData\Local\Temp\is-OJDTA.tmp\is-8PA5U.tmp" /SL4 $4025C "C:\Users\user\Desktop\file.exe" 1079207 51712 MD5: 85B94E72C3F2D2B5464E2AAF3C9E242A)
      • PrintFolders.exe (PID: 2344 cmdline: "C:\Program Files (x86)\PrintFolders\PrintFolders.exe" MD5: 988A479E180E7899959663226C9AAC1B)
        • 1mWX2l.exe (PID: 4668 cmdline: MD5: 3FB36CB0B7172E5298D2992D42984D06)
        • cmd.exe (PID: 6128 cmdline: "C:\Windows\System32\cmd.exe" /c taskkill /im "PrintFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\PrintFolders.exe" & exit MD5: F3BDBE3BB6F734E357235F4D5898582D)
          • conhost.exe (PID: 1688 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
          • taskkill.exe (PID: 3172 cmdline: taskkill /im "PrintFolders.exe" /f MD5: 15E2E0ACD891510C6268CB8899F2A1A1)
  • cleanup

Malware Configuration

Threatname: Nymaim

{"C2 addresses": ["45.139.105.1", "85.31.46.167", "107.182.129.235", "171.22.30.106"]}

Yara Signatures

Memory Dumps

SourceRuleDescriptionAuthorStrings
00000002.00000002.381983447.00000000030D0000.00000004.00001000.00020000.00000000.sdmpJoeSecurity_NymaimYara detected NymaimJoe Security
    00000002.00000002.381766513.0000000003070000.00000004.00001000.00020000.00000000.sdmpJoeSecurity_NymaimYara detected NymaimJoe Security
      00000002.00000002.380785981.0000000000400000.00000040.00000001.01000000.00000007.sdmpJoeSecurity_NymaimYara detected NymaimJoe Security

        Unpacked PEs

        SourceRuleDescriptionAuthorStrings
        2.2.PrintFolders.exe.3070000.2.unpackJoeSecurity_NymaimYara detected NymaimJoe Security
          2.2.PrintFolders.exe.3070000.2.raw.unpackJoeSecurity_NymaimYara detected NymaimJoe Security
            2.2.PrintFolders.exe.400000.1.unpackJoeSecurity_NymaimYara detected NymaimJoe Security
              2.2.PrintFolders.exe.400000.1.raw.unpackJoeSecurity_NymaimYara detected NymaimJoe Security

                Sigma Signatures

                ⊘No Sigma rule has matched

                Snort Signatures

                ⊘No Snort rule has matched

                Joe Sandbox Signatures

                Click to jump to signature section

                Show All Signature Results

                AV Detection

                barindex
                Antivirus detection for URL or domain
                Source: http://171.22.30.106/library.phpURL Reputation: Label: malware
                Multi AV Scanner detection for dropped file
                Source: C:\Users\user\AppData\Roaming\{e6e9dfa8-98f2-11e9-90ce-806e6f6e6963}\1mWX2l.exeReversingLabs: Detection: 46%
                Machine Learning detection for dropped file
                Source: C:\Program Files (x86)\PrintFolders\PrintFolders.exeJoe Sandbox ML: detected
                Source: 2.2.PrintFolders.exe.10000000.6.unpackAvira: Label: TR/Crypt.XPACK.Gen8
                Source: 0.3.file.exe.20e8000.4.unpackAvira: Label: TR/Patched.Ren.Gen
                Source: 2.2.PrintFolders.exe.400000.1.unpackMalware Configuration Extractor: Nymaim {"C2 addresses": ["45.139.105.1", "85.31.46.167", "107.182.129.235", "171.22.30.106"]}
                Source: C:\Users\user\AppData\Local\Temp\is-OJDTA.tmp\is-8PA5U.tmpCode function: 1_2_10001000 ISCryptGetVersion,
                Source: C:\Users\user\AppData\Local\Temp\is-OJDTA.tmp\is-8PA5U.tmpCode function: 1_2_10001130 ArcFourCrypt,
                Source: C:\Program Files (x86)\PrintFolders\PrintFolders.exeCode function: 2_2_00403770 CryptAcquireContextW,CryptCreateHash,_mbstowcs,CryptHashData,GetLastError,CryptDeriveKey,GetLastError,CryptReleaseContext,CryptDecrypt,CryptDestroyKey,___std_exception_copy,

                Compliance

                barindex
                Detected unpacking (overwrites its own PE header)
                Source: C:\Program Files (x86)\PrintFolders\PrintFolders.exeUnpacked PE file: 2.2.PrintFolders.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
                Source: Binary string: E:\DATA\Codework\PrintFolders\source\Release\Russian.pdb source: is-NSDTB.tmp.1.dr
                Source: C:\Users\user\AppData\Local\Temp\is-OJDTA.tmp\is-8PA5U.tmpCode function: 1_2_0046C770 FindFirstFileA,FindNextFileA,FindClose,
                Source: C:\Users\user\AppData\Local\Temp\is-OJDTA.tmp\is-8PA5U.tmpCode function: 1_2_00474708 FindFirstFileA,FindNextFileA,FindClose,FindFirstFileA,FindNextFileA,FindClose,
                Source: C:\Users\user\AppData\Local\Temp\is-OJDTA.tmp\is-8PA5U.tmpCode function: 1_2_00451554 FindFirstFileA,GetLastError,
                Source: C:\Users\user\AppData\Local\Temp\is-OJDTA.tmp\is-8PA5U.tmpCode function: 1_2_0048A778 FindFirstFileA,6D7369D0,FindNextFileA,FindClose,
                Source: C:\Users\user\AppData\Local\Temp\is-OJDTA.tmp\is-8PA5U.tmpCode function: 1_2_004729D4 FindFirstFileA,FindNextFileA,FindClose,FindFirstFileA,FindNextFileA,FindClose,
                Source: C:\Users\user\AppData\Local\Temp\is-OJDTA.tmp\is-8PA5U.tmpCode function: 1_2_0045CA54 FindFirstFileA,FindNextFileA,FindClose,
                Source: C:\Users\user\AppData\Local\Temp\is-OJDTA.tmp\is-8PA5U.tmpCode function: 1_2_00406FEC FindFirstFileA,FindClose,FileTimeToLocalFileTime,FileTimeToDosDateTime,
                Source: C:\Users\user\AppData\Local\Temp\is-OJDTA.tmp\is-8PA5U.tmpCode function: 1_2_0045DB60 SetErrorMode,FindFirstFileA,FindNextFileA,FindClose,SetErrorMode,
                Source: C:\Users\user\AppData\Local\Temp\is-OJDTA.tmp\is-8PA5U.tmpCode function: 1_2_0045DEF4 SetErrorMode,FindFirstFileA,FindNextFileA,FindClose,SetErrorMode,
                Source: C:\Program Files (x86)\PrintFolders\PrintFolders.exeCode function: 2_2_00404490 FindFirstFileA,FindNextFileA,FindNextFileA,FindClose,__Init_thread_footer,__Init_thread_footer,__Init_thread_footer,__Init_thread_footer,
                Source: C:\Program Files (x86)\PrintFolders\PrintFolders.exeCode function: 2_2_00423E2D FindFirstFileExW,
                Source: C:\Program Files (x86)\PrintFolders\PrintFolders.exeCode function: 2_2_1000959D FindFirstFileExW,
                Source: C:\Users\user\Desktop\file.exeFile opened: C:\Users\user\AppData\Local\Temp\
                Source: C:\Users\user\Desktop\file.exeFile opened: C:\Users\user\AppData\Local\
                Source: C:\Users\user\Desktop\file.exeFile opened: C:\Users\user\AppData\Local\Temp\is-OJDTA.tmp\is-8PA5U.tmp
                Source: C:\Users\user\Desktop\file.exeFile opened: C:\Users\user\AppData\
                Source: C:\Users\user\Desktop\file.exeFile opened: C:\Users\user\AppData\Local\Temp\is-OJDTA.tmp\
                Source: C:\Users\user\Desktop\file.exeFile opened: C:\Users\user\

                Networking

                barindex
                C2 URLs / IPs found in malware configuration
                Source: Malware configuration extractorIPs: 45.139.105.1
                Source: Malware configuration extractorIPs: 85.31.46.167
                Source: Malware configuration extractorIPs: 107.182.129.235
                Source: Malware configuration extractorIPs: 171.22.30.106