Resubmissions

14-06-2022 13:46

220614-q27ymaeddr 10

14-06-2022 13:36

220614-qwnmssadd4 3

14-06-2022 09:14

220614-k7h9kahcb9 10

12-06-2022 12:43

220612-pxv8lacabn 7

01-06-2022 16:27

220601-tyedpaeahk 10

Analysis

  • max time kernel
    149s
  • max time network
    140s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    01-06-2022 16:27

General

  • Target

    zxcvb.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 4 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Loads dropped DLL 6 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 16 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 61 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\zxcvb.exe
    "C:\Users\Admin\AppData\Local\Temp\zxcvb.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:892
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout /t 20
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:996
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 20
        3⤵
        • Delays execution with timeout.exe
        PID:1976
    • 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:664
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c timeout /t 20
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1364
        • C:\Windows\SysWOW64\timeout.exe
          timeout /t 20
          4⤵
          • Delays execution with timeout.exe
          PID:1736
      • C:\Users\Admin\AppData\Local\Temp\Iioozcrscrdqdprjojgormars2.exe
        C:\Users\Admin\AppData\Local\Temp\Iioozcrscrdqdprjojgormars2.exe
        3⤵
        • Executes dropped EXE
        PID:756
      • C:\Users\Admin\AppData\Local\Temp\Iioozcrscrdqdprjojgormars2.exe
        C:\Users\Admin\AppData\Local\Temp\Iioozcrscrdqdprjojgormars2.exe
        3⤵
        • Executes dropped EXE
        PID:876
      • 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:276
        • 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:1324
          • C:\Windows\SysWOW64\timeout.exe
            timeout /t 5
            5⤵
            • Delays execution with timeout.exe
            PID:1948
    • C:\Users\Admin\AppData\Local\Temp\zxcvb.exe
      C:\Users\Admin\AppData\Local\Temp\zxcvb.exe
      2⤵
        PID:1288
      • C:\Users\Admin\AppData\Local\Temp\zxcvb.exe
        C:\Users\Admin\AppData\Local\Temp\zxcvb.exe
        2⤵
          PID:1772

      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

      • 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

      • \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/276-104-0x0000000000400000-0x000000000043D000-memory.dmp

        Filesize

        244KB

      • memory/276-107-0x0000000000400000-0x000000000043D000-memory.dmp

        Filesize

        244KB

      • memory/276-110-0x0000000000400000-0x000000000043D000-memory.dmp

        Filesize

        244KB

      • memory/276-109-0x0000000000400000-0x000000000043D000-memory.dmp

        Filesize

        244KB

      • memory/276-106-0x0000000000400000-0x000000000043D000-memory.dmp

        Filesize

        244KB

      • memory/276-102-0x0000000000400000-0x000000000043D000-memory.dmp

        Filesize

        244KB

      • memory/276-101-0x0000000000400000-0x000000000043D000-memory.dmp

        Filesize

        244KB

      • memory/276-114-0x0000000000400000-0x000000000043D000-memory.dmp

        Filesize

        244KB

      • memory/276-117-0x0000000000400000-0x000000000043D000-memory.dmp

        Filesize

        244KB

      • memory/276-120-0x0000000060900000-0x0000000060992000-memory.dmp

        Filesize

        584KB

      • memory/276-142-0x0000000000400000-0x000000000043D000-memory.dmp

        Filesize

        244KB

      • memory/664-69-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/664-115-0x00000000729A0000-0x0000000073D2F000-memory.dmp

        Filesize

        19.6MB

      • memory/664-118-0x00000000717B0000-0x0000000071F90000-memory.dmp

        Filesize

        7.9MB

      • memory/664-116-0x0000000071F90000-0x00000000729A0000-memory.dmp

        Filesize

        10.1MB

      • memory/664-95-0x0000000070930000-0x000000007106E000-memory.dmp

        Filesize

        7.2MB

      • memory/664-94-0x0000000073F40000-0x000000007403C000-memory.dmp

        Filesize

        1008KB

      • memory/664-90-0x00000000729A0000-0x0000000073D2F000-memory.dmp

        Filesize

        19.6MB

      • memory/664-91-0x0000000071F90000-0x00000000729A0000-memory.dmp

        Filesize

        10.1MB

      • memory/664-92-0x00000000717B0000-0x0000000071F90000-memory.dmp

        Filesize

        7.9MB

      • memory/664-93-0x0000000004BC0000-0x0000000004C26000-memory.dmp

        Filesize

        408KB

      • memory/892-86-0x00000000729A0000-0x0000000073D2F000-memory.dmp

        Filesize

        19.6MB

      • memory/892-62-0x0000000071070000-0x00000000717AE000-memory.dmp

        Filesize

        7.2MB

      • memory/892-64-0x0000000004F10000-0x0000000004F5C000-memory.dmp

        Filesize

        304KB

      • memory/892-63-0x0000000001150000-0x00000000011A4000-memory.dmp

        Filesize

        336KB

      • memory/892-55-0x0000000075801000-0x0000000075803000-memory.dmp

        Filesize

        8KB

      • memory/892-61-0x0000000074230000-0x000000007432C000-memory.dmp

        Filesize

        1008KB

      • memory/892-58-0x00000000729A0000-0x0000000073D2F000-memory.dmp

        Filesize

        19.6MB

      • memory/892-60-0x00000000717B0000-0x0000000071F90000-memory.dmp

        Filesize

        7.9MB

      • memory/892-89-0x00000000717B0000-0x0000000071F90000-memory.dmp

        Filesize

        7.9MB

      • memory/892-59-0x0000000071F90000-0x00000000729A0000-memory.dmp

        Filesize

        10.1MB

      • memory/892-54-0x0000000001390000-0x00000000013A0000-memory.dmp

        Filesize

        64KB

      • memory/892-87-0x0000000071F90000-0x00000000729A0000-memory.dmp

        Filesize

        10.1MB

      • memory/1772-75-0x0000000000400000-0x0000000000412000-memory.dmp

        Filesize

        72KB

      • memory/1772-72-0x0000000000400000-0x0000000000412000-memory.dmp

        Filesize

        72KB

      • memory/1772-84-0x0000000000400000-0x0000000000412000-memory.dmp

        Filesize

        72KB

      • memory/1772-88-0x0000000000400000-0x0000000000412000-memory.dmp

        Filesize

        72KB

      • memory/1772-71-0x0000000000400000-0x0000000000412000-memory.dmp

        Filesize

        72KB

      • memory/1772-78-0x0000000000400000-0x0000000000412000-memory.dmp

        Filesize

        72KB

      • memory/1772-77-0x0000000000400000-0x0000000000412000-memory.dmp

        Filesize

        72KB

      • memory/1772-80-0x0000000000400000-0x0000000000412000-memory.dmp

        Filesize

        72KB