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Analysis

  • max time kernel
    151s
  • max time network
    143s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    01/06/2022, 16:06

General

  • Target

    ghjkl.exe

  • Size

    40KB

  • MD5

    0a7b32e75a01764ef5389a1d9e72ed63

  • SHA1

    871366f3573c3349e9dc7b67fef1ef575815c154

  • SHA256

    34ba222ef969f09ecca5506cbada7c346469a96a6af0cdd21146d4435196deda

  • SHA512

    f19a7d56a825b59d2841a4f10db940458d3255239e15bb9bbe1376e1fc47d4c97aef09d4e7ecd5a3a35fca44ec92edf60edd4a07ef1845d679c3bd4fc8fe43ba

Malware Config

Extracted

Family

arkei

Botnet

Default

Signatures

  • Arkei

    Arkei is an infostealer written in C++.

  • suricata: ET MALWARE Base64 Encoded Stealer Config from Server - APPDATA or USERPROFILE Environment Variable M4

    suricata: ET MALWARE Base64 Encoded Stealer Config from Server - APPDATA or USERPROFILE Environment Variable M4

  • suricata: ET MALWARE Win32/Vidar Variant/Mars Stealer CnC Exfil

    suricata: ET MALWARE Win32/Vidar Variant/Mars Stealer CnC Exfil

  • Executes dropped EXE 2 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Loads dropped DLL 4 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Delays execution with timeout.exe 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 49 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ghjkl.exe
    "C:\Users\Admin\AppData\Local\Temp\ghjkl.exe"
    1⤵
    • Checks computer location settings
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:812
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout /t 20
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1764
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 20
        3⤵
        • Delays execution with timeout.exe
        PID:960
    • C:\Users\Admin\AppData\Local\Temp\Iioozcrscrdqdprjojgormars2.exe
      "C:\Users\Admin\AppData\Local\Temp\Iioozcrscrdqdprjojgormars2.exe"
      2⤵
      • Executes dropped EXE
      • Checks computer location settings
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2028
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c timeout /t 20
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1076
        • C:\Windows\SysWOW64\timeout.exe
          timeout /t 20
          4⤵
          • Delays execution with timeout.exe
          PID:1668
      • C:\Users\Admin\AppData\Local\Temp\Iioozcrscrdqdprjojgormars2.exe
        C:\Users\Admin\AppData\Local\Temp\Iioozcrscrdqdprjojgormars2.exe
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Checks processor information in registry
        • Suspicious use of WriteProcessMemory
        PID:2004
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\Iioozcrscrdqdprjojgormars2.exe" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1548
          • C:\Windows\SysWOW64\timeout.exe
            timeout /t 5
            5⤵
            • Delays execution with timeout.exe
            PID:528
    • C:\Users\Admin\AppData\Local\Temp\ghjkl.exe
      C:\Users\Admin\AppData\Local\Temp\ghjkl.exe
      2⤵
        PID:592

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\Iioozcrscrdqdprjojgormars2.exe

      Filesize

      40KB

      MD5

      e8065b3712ff329829a9a9d191b684d7

      SHA1

      be243f806044523da8cfbd65b0aa0057e24ee984

      SHA256

      6b7698fc83039d223e81f3352ea03afdb4fa4c3042a92683298c7fa5f67d5a07

      SHA512

      73641d298b07f51da61218babfec650d7a9de8c3ad6d10c81dd14cb1ac5d50e19624cfbde78f1c7af10698bfa76e83a79a751569839fabc547cb253c5bd3e0c0

    • C:\Users\Admin\AppData\Local\Temp\Iioozcrscrdqdprjojgormars2.exe

      Filesize

      40KB

      MD5

      e8065b3712ff329829a9a9d191b684d7

      SHA1

      be243f806044523da8cfbd65b0aa0057e24ee984

      SHA256

      6b7698fc83039d223e81f3352ea03afdb4fa4c3042a92683298c7fa5f67d5a07

      SHA512

      73641d298b07f51da61218babfec650d7a9de8c3ad6d10c81dd14cb1ac5d50e19624cfbde78f1c7af10698bfa76e83a79a751569839fabc547cb253c5bd3e0c0

    • C:\Users\Admin\AppData\Local\Temp\Iioozcrscrdqdprjojgormars2.exe

      Filesize

      40KB

      MD5

      e8065b3712ff329829a9a9d191b684d7

      SHA1

      be243f806044523da8cfbd65b0aa0057e24ee984

      SHA256

      6b7698fc83039d223e81f3352ea03afdb4fa4c3042a92683298c7fa5f67d5a07

      SHA512

      73641d298b07f51da61218babfec650d7a9de8c3ad6d10c81dd14cb1ac5d50e19624cfbde78f1c7af10698bfa76e83a79a751569839fabc547cb253c5bd3e0c0

    • \ProgramData\mozglue.dll

      Filesize

      133KB

      MD5

      8f73c08a9660691143661bf7332c3c27

      SHA1

      37fa65dd737c50fda710fdbde89e51374d0c204a

      SHA256

      3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

      SHA512

      0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

    • \ProgramData\nss3.dll

      Filesize

      1.2MB

      MD5

      bfac4e3c5908856ba17d41edcd455a51

      SHA1

      8eec7e888767aa9e4cca8ff246eb2aacb9170428

      SHA256

      e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

      SHA512

      2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

    • \Users\Admin\AppData\Local\Temp\Iioozcrscrdqdprjojgormars2.exe

      Filesize

      40KB

      MD5

      e8065b3712ff329829a9a9d191b684d7

      SHA1

      be243f806044523da8cfbd65b0aa0057e24ee984

      SHA256

      6b7698fc83039d223e81f3352ea03afdb4fa4c3042a92683298c7fa5f67d5a07

      SHA512

      73641d298b07f51da61218babfec650d7a9de8c3ad6d10c81dd14cb1ac5d50e19624cfbde78f1c7af10698bfa76e83a79a751569839fabc547cb253c5bd3e0c0

    • \Users\Admin\AppData\Local\Temp\Iioozcrscrdqdprjojgormars2.exe

      Filesize

      40KB

      MD5

      e8065b3712ff329829a9a9d191b684d7

      SHA1

      be243f806044523da8cfbd65b0aa0057e24ee984

      SHA256

      6b7698fc83039d223e81f3352ea03afdb4fa4c3042a92683298c7fa5f67d5a07

      SHA512

      73641d298b07f51da61218babfec650d7a9de8c3ad6d10c81dd14cb1ac5d50e19624cfbde78f1c7af10698bfa76e83a79a751569839fabc547cb253c5bd3e0c0

    • memory/592-93-0x0000000000400000-0x0000000000412000-memory.dmp

      Filesize

      72KB

    • memory/592-84-0x0000000000400000-0x0000000000412000-memory.dmp

      Filesize

      72KB

    • memory/592-80-0x0000000000400000-0x0000000000412000-memory.dmp

      Filesize

      72KB

    • memory/592-78-0x0000000000400000-0x0000000000412000-memory.dmp

      Filesize

      72KB

    • memory/592-77-0x0000000000400000-0x0000000000412000-memory.dmp

      Filesize

      72KB

    • memory/592-72-0x0000000000400000-0x0000000000412000-memory.dmp

      Filesize

      72KB

    • memory/592-74-0x0000000000400000-0x0000000000412000-memory.dmp

      Filesize

      72KB

    • memory/592-71-0x0000000000400000-0x0000000000412000-memory.dmp

      Filesize

      72KB

    • memory/812-88-0x0000000071670000-0x0000000072080000-memory.dmp

      Filesize

      10.1MB

    • memory/812-87-0x0000000072080000-0x000000007340F000-memory.dmp

      Filesize

      19.6MB

    • memory/812-55-0x0000000075FB1000-0x0000000075FB3000-memory.dmp

      Filesize

      8KB

    • memory/812-65-0x0000000004CC0000-0x0000000004D0C000-memory.dmp

      Filesize

      304KB

    • memory/812-64-0x0000000002350000-0x00000000023A4000-memory.dmp

      Filesize

      336KB

    • memory/812-63-0x0000000070750000-0x0000000070E8E000-memory.dmp

      Filesize

      7.2MB

    • memory/812-62-0x00000000739D0000-0x0000000073ACC000-memory.dmp

      Filesize

      1008KB

    • memory/812-60-0x0000000070E90000-0x0000000071670000-memory.dmp

      Filesize

      7.9MB

    • memory/812-61-0x0000000072080000-0x000000007340F000-memory.dmp

      Filesize

      19.6MB

    • memory/812-58-0x0000000072080000-0x000000007340F000-memory.dmp

      Filesize

      19.6MB

    • memory/812-59-0x0000000071670000-0x0000000072080000-memory.dmp

      Filesize

      10.1MB

    • memory/812-54-0x0000000000DE0000-0x0000000000DF0000-memory.dmp

      Filesize

      64KB

    • memory/812-89-0x0000000070E90000-0x0000000071670000-memory.dmp

      Filesize

      7.9MB

    • memory/2004-98-0x0000000000400000-0x000000000043D000-memory.dmp

      Filesize

      244KB

    • memory/2004-115-0x0000000000400000-0x000000000043D000-memory.dmp

      Filesize

      244KB

    • memory/2004-140-0x0000000000400000-0x000000000043D000-memory.dmp

      Filesize

      244KB

    • memory/2004-136-0x0000000000400000-0x000000000043D000-memory.dmp

      Filesize

      244KB

    • memory/2004-99-0x0000000000400000-0x000000000043D000-memory.dmp

      Filesize

      244KB

    • memory/2004-101-0x0000000000400000-0x000000000043D000-memory.dmp

      Filesize

      244KB

    • memory/2004-103-0x0000000000400000-0x000000000043D000-memory.dmp

      Filesize

      244KB

    • memory/2004-104-0x0000000000400000-0x000000000043D000-memory.dmp

      Filesize

      244KB

    • memory/2004-106-0x0000000000400000-0x000000000043D000-memory.dmp

      Filesize

      244KB

    • memory/2004-107-0x0000000000400000-0x000000000043D000-memory.dmp

      Filesize

      244KB

    • memory/2004-117-0x0000000060900000-0x0000000060992000-memory.dmp

      Filesize

      584KB

    • memory/2004-111-0x0000000000400000-0x000000000043D000-memory.dmp

      Filesize

      244KB

    • memory/2028-112-0x0000000072080000-0x000000007340F000-memory.dmp

      Filesize

      19.6MB

    • memory/2028-113-0x0000000071670000-0x0000000072080000-memory.dmp

      Filesize

      10.1MB

    • memory/2028-114-0x0000000070E90000-0x0000000071670000-memory.dmp

      Filesize

      7.9MB

    • memory/2028-96-0x00000000048E0000-0x0000000004946000-memory.dmp

      Filesize

      408KB

    • memory/2028-94-0x00000000736E0000-0x00000000737DC000-memory.dmp

      Filesize

      1008KB

    • memory/2028-70-0x0000000000800000-0x0000000000810000-memory.dmp

      Filesize

      64KB

    • memory/2028-92-0x0000000070E90000-0x0000000071670000-memory.dmp

      Filesize

      7.9MB

    • memory/2028-91-0x0000000071670000-0x0000000072080000-memory.dmp

      Filesize

      10.1MB

    • memory/2028-90-0x0000000072080000-0x000000007340F000-memory.dmp

      Filesize

      19.6MB

    • memory/2028-95-0x0000000070010000-0x000000007074E000-memory.dmp

      Filesize

      7.2MB