Analysis

  • max time kernel
    98s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/12/2022, 12:14

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 10 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:3528
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3528 -s 456
      2⤵
      • Program crash
      PID:4740
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3528 -s 772
      2⤵
      • Program crash
      PID:448
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3528 -s 804
      2⤵
      • Program crash
      PID:4728
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3528 -s 804
      2⤵
      • Program crash
      PID:552
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3528 -s 836
      2⤵
      • Program crash
      PID:1704
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3528 -s 936
      2⤵
      • Program crash
      PID:1420
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3528 -s 976
      2⤵
      • Program crash
      PID:1956
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3528 -s 1056
      2⤵
      • Program crash
      PID:1116
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3528 -s 1004
      2⤵
      • Program crash
      PID:4176
    • 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:1580
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /im "3a4fc843fea55ee700af9ca739e690e0.exe" /f
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:3052
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3528 -s 1488
      2⤵
      • Program crash
      PID:3224
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 188 -p 3528 -ip 3528
    1⤵
      PID:4412
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 484 -p 3528 -ip 3528
      1⤵
        PID:3788
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 3528 -ip 3528
        1⤵
          PID:692
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 3528 -ip 3528
          1⤵
            PID:4776
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 3528 -ip 3528
            1⤵
              PID:740
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -pss -s 488 -p 3528 -ip 3528
              1⤵
                PID:1432
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 3528 -ip 3528
                1⤵
                  PID:1336
                • C:\Windows\SysWOW64\WerFault.exe
                  C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 3528 -ip 3528
                  1⤵
                    PID:1348
                  • C:\Windows\SysWOW64\WerFault.exe
                    C:\Windows\SysWOW64\WerFault.exe -pss -s 544 -p 3528 -ip 3528
                    1⤵
                      PID:2156
                    • C:\Windows\SysWOW64\WerFault.exe
                      C:\Windows\SysWOW64\WerFault.exe -pss -s 544 -p 3528 -ip 3528
                      1⤵
                        PID:1988

                      Network

                      MITRE ATT&CK Enterprise v6

                      Replay Monitor

                      Loading Replay Monitor...

                      Downloads

                      • memory/3528-132-0x0000000000727000-0x000000000074E000-memory.dmp

                        Filesize

                        156KB

                      • memory/3528-133-0x00000000005B0000-0x00000000005F0000-memory.dmp

                        Filesize

                        256KB

                      • memory/3528-134-0x0000000000400000-0x0000000000462000-memory.dmp

                        Filesize

                        392KB

                      • memory/3528-137-0x0000000000727000-0x000000000074E000-memory.dmp

                        Filesize

                        156KB

                      • memory/3528-138-0x0000000000400000-0x0000000000462000-memory.dmp

                        Filesize

                        392KB