Analysis

  • max time kernel
    61s
  • max time network
    124s
  • 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, 12:15

General

  • Target

    3a4fc843fea55ee700af9ca739e690e0.exe

  • Size

    371KB

  • MD5

    3a4fc843fea55ee700af9ca739e690e0

  • SHA1

    355974b4c3165312c59afda5f1f11224b73e25dc

  • SHA256

    80e0fad3bd2c2640bcb4aa073e7195a8fac77ac92b1085ca71cf975da3de6f9d

  • SHA512

    9d218a6f8f59674db9fa3ee433685b215cd8902eab33efb2dead60e0901be3a57199a4ee710b5ab2894f3cc241e591f05a78394f6089e8b36208ce4b91d6c6c9

  • SSDEEP

    6144:KOUR7L0Nr4NBsR1JjXjOvlNW62F5grTPPw7n1HbwZoV0J:mBgUsRHgde5Iw7

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\3a4fc843fea55ee700af9ca739e690e0.exe
    "C:\Users\Admin\AppData\Local\Temp\3a4fc843fea55ee700af9ca739e690e0.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3540
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3540 -s 456
      2⤵
      • Program crash
      PID:2204
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3540 -s 764
      2⤵
      • Program crash
      PID:176
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3540 -s 772
      2⤵
      • Program crash
      PID:1028
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3540 -s 772
      2⤵
      • Program crash
      PID:2248
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3540 -s 820
      2⤵
      • Program crash
      PID:4528
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3540 -s 928
      2⤵
      • Program crash
      PID:4184
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3540 -s 1004
      2⤵
      • Program crash
      PID:4468
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3540 -s 1372
      2⤵
      • Program crash
      PID:3860
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "3a4fc843fea55ee700af9ca739e690e0.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\3a4fc843fea55ee700af9ca739e690e0.exe" & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1532
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /im "3a4fc843fea55ee700af9ca739e690e0.exe" /f
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:3564
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3540 -s 516
      2⤵
      • Program crash
      PID:3120
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 3540 -ip 3540
    1⤵
      PID:444
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 384 -p 3540 -ip 3540
      1⤵
        PID:4504
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 476 -p 3540 -ip 3540
        1⤵
          PID:4716
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 476 -p 3540 -ip 3540
          1⤵
            PID:1212
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 3540 -ip 3540
            1⤵
              PID:4700
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 3540 -ip 3540
              1⤵
                PID:2768
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -pss -s 580 -p 3540 -ip 3540
                1⤵
                  PID:4640
                • C:\Windows\SysWOW64\WerFault.exe
                  C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 3540 -ip 3540
                  1⤵
                    PID:3748
                  • C:\Windows\SysWOW64\WerFault.exe
                    C:\Windows\SysWOW64\WerFault.exe -pss -s 596 -p 3540 -ip 3540
                    1⤵
                      PID:4968

                    Network

                    MITRE ATT&CK Enterprise v6

                    Replay Monitor

                    Loading Replay Monitor...

                    Downloads

                    • memory/3540-132-0x0000000000697000-0x00000000006BE000-memory.dmp

                      Filesize

                      156KB

                    • memory/3540-133-0x00000000005C0000-0x0000000000600000-memory.dmp

                      Filesize

                      256KB

                    • memory/3540-134-0x0000000000400000-0x0000000000462000-memory.dmp

                      Filesize

                      392KB

                    • memory/3540-137-0x0000000000697000-0x00000000006BE000-memory.dmp

                      Filesize

                      156KB

                    • memory/3540-138-0x0000000000400000-0x0000000000462000-memory.dmp

                      Filesize

                      392KB