Analysis

  • max time kernel
    90s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/12/2022, 12:13

General

  • Target

    4f8aaa32c25c0df6e6d6b07147fe2210.exe

  • Size

    396KB

  • MD5

    4f8aaa32c25c0df6e6d6b07147fe2210

  • SHA1

    6a3d3cc1440dc5ccd401dcad9f2aa2b5e58efb6a

  • SHA256

    3130ae5c7eb9359f37503eae4d9e163031db1cf5cf39b1cf353fefda5e037ed8

  • SHA512

    a46d34e735d5953c006c0507d2d76f626a056981ad71052987632016c0512d3b9cbaa0e5efdd9f2230e2b3f218890c2095f44ab9d248be2b7eac7eedbfb2496a

  • SSDEEP

    6144:+UfKLfKeWByzgwsVqNGIxg4l2wjJFLDk9iGce6o1Yf67k13bwZ4Vxq:dC2eDzgXVeGIxg4XjJlm6o1Yy7

Score
10/10

Malware Config

Extracted

Family

nymaim

C2

45.139.105.171

85.31.46.167

Signatures

  • NyMaim

    NyMaim is a malware with various capabilities written in C++ and first seen in 2013.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 9 IoCs
  • Kills process with taskkill 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4f8aaa32c25c0df6e6d6b07147fe2210.exe
    "C:\Users\Admin\AppData\Local\Temp\4f8aaa32c25c0df6e6d6b07147fe2210.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3912
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3912 -s 452
      2⤵
      • Program crash
      PID:4448
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3912 -s 772
      2⤵
      • Program crash
      PID:384
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3912 -s 784
      2⤵
      • Program crash
      PID:2056
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3912 -s 772
      2⤵
      • Program crash
      PID:4580
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3912 -s 836
      2⤵
      • Program crash
      PID:2608
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3912 -s 928
      2⤵
      • Program crash
      PID:1380
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3912 -s 1008
      2⤵
      • Program crash
      PID:5036
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3912 -s 1360
      2⤵
      • Program crash
      PID:4984
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "4f8aaa32c25c0df6e6d6b07147fe2210.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\4f8aaa32c25c0df6e6d6b07147fe2210.exe" & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4216
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /im "4f8aaa32c25c0df6e6d6b07147fe2210.exe" /f
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:4740
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3912 -s 1396
      2⤵
      • Program crash
      PID:924
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 3912 -ip 3912
    1⤵
      PID:3276
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 500 -p 3912 -ip 3912
      1⤵
        PID:3116
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 3912 -ip 3912
        1⤵
          PID:4668
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 3912 -ip 3912
          1⤵
            PID:2252
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 3912 -ip 3912
            1⤵
              PID:3484
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -pss -s 568 -p 3912 -ip 3912
              1⤵
                PID:3104
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 3912 -ip 3912
                1⤵
                  PID:1064
                • C:\Windows\SysWOW64\WerFault.exe
                  C:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 3912 -ip 3912
                  1⤵
                    PID:5080
                  • C:\Windows\SysWOW64\WerFault.exe
                    C:\Windows\SysWOW64\WerFault.exe -pss -s 488 -p 3912 -ip 3912
                    1⤵
                      PID:4528

                    Network

                    MITRE ATT&CK Enterprise v6

                    Replay Monitor

                    Loading Replay Monitor...

                    Downloads

                    • memory/3912-132-0x00000000004C7000-0x00000000004EE000-memory.dmp

                      Filesize

                      156KB

                    • memory/3912-133-0x00000000008D0000-0x0000000000910000-memory.dmp

                      Filesize

                      256KB

                    • memory/3912-134-0x0000000000400000-0x0000000000468000-memory.dmp

                      Filesize

                      416KB

                    • memory/3912-137-0x00000000004C7000-0x00000000004EE000-memory.dmp

                      Filesize

                      156KB

                    • memory/3912-138-0x0000000000400000-0x0000000000468000-memory.dmp

                      Filesize

                      416KB