Analysis

  • max time kernel
    142s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/12/2022, 12:16

General

  • Target

    121c8d638b96a43eb3c2fb623e467536.exe

  • Size

    371KB

  • MD5

    121c8d638b96a43eb3c2fb623e467536

  • SHA1

    51ce2503b96428fd2c647816728e7ba8b97ae1ec

  • SHA256

    3c476ad15acd041a55c25fe36c6eb40b5f4112d3bb5bc36ca1c619a9269c20bc

  • SHA512

    73b076553727885b8d94fd92b9e33e23a4f97d98ec2453be78acda53ebafd6f9a9c11e56be0ef23c87cc535432ab885c03a84b55f25acb80bc2e0928be72fb63

  • SSDEEP

    6144:VkUXaLyOOZ/7mXe5Bm0O7lcd5UcJmL6CKPT9YfYAuw7n1HbwZoV9J:hK2XKO5k0O7mucYOCKb9fAuw7

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\121c8d638b96a43eb3c2fb623e467536.exe
    "C:\Users\Admin\AppData\Local\Temp\121c8d638b96a43eb3c2fb623e467536.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2268
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2268 -s 456
      2⤵
      • Program crash
      PID:4844
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2268 -s 772
      2⤵
      • Program crash
      PID:4116
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2268 -s 812
      2⤵
      • Program crash
      PID:3340
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2268 -s 812
      2⤵
      • Program crash
      PID:1096
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2268 -s 772
      2⤵
      • Program crash
      PID:4756
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2268 -s 928
      2⤵
      • Program crash
      PID:1632
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2268 -s 1020
      2⤵
      • Program crash
      PID:4400
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2268 -s 1088
      2⤵
      • Program crash
      PID:1920
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2268 -s 1356
      2⤵
      • Program crash
      PID:2144
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "121c8d638b96a43eb3c2fb623e467536.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\121c8d638b96a43eb3c2fb623e467536.exe" & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2760
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /im "121c8d638b96a43eb3c2fb623e467536.exe" /f
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:1268
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2268 -s 468
      2⤵
      • Program crash
      PID:3148
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 2268 -ip 2268
    1⤵
      PID:2640
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 396 -p 2268 -ip 2268
      1⤵
        PID:2252
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 2268 -ip 2268
        1⤵
          PID:5108
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 544 -p 2268 -ip 2268
          1⤵
            PID:1192
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -pss -s 560 -p 2268 -ip 2268
            1⤵
              PID:1360
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -pss -s 560 -p 2268 -ip 2268
              1⤵
                PID:4436
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -pss -s 580 -p 2268 -ip 2268
                1⤵
                  PID:4232
                • C:\Windows\SysWOW64\WerFault.exe
                  C:\Windows\SysWOW64\WerFault.exe -pss -s 608 -p 2268 -ip 2268
                  1⤵
                    PID:4984
                  • C:\Windows\SysWOW64\WerFault.exe
                    C:\Windows\SysWOW64\WerFault.exe -pss -s 624 -p 2268 -ip 2268
                    1⤵
                      PID:4416
                    • C:\Windows\SysWOW64\WerFault.exe
                      C:\Windows\SysWOW64\WerFault.exe -pss -s 652 -p 2268 -ip 2268
                      1⤵
                        PID:3248

                      Network

                      MITRE ATT&CK Enterprise v6

                      Replay Monitor

                      Loading Replay Monitor...

                      Downloads

                      • memory/2268-132-0x00000000005B7000-0x00000000005DE000-memory.dmp

                        Filesize

                        156KB

                      • memory/2268-133-0x00000000008E0000-0x0000000000920000-memory.dmp

                        Filesize

                        256KB

                      • memory/2268-134-0x0000000000400000-0x0000000000462000-memory.dmp

                        Filesize

                        392KB

                      • memory/2268-137-0x00000000005B7000-0x00000000005DE000-memory.dmp

                        Filesize

                        156KB

                      • memory/2268-138-0x0000000000400000-0x0000000000462000-memory.dmp

                        Filesize

                        392KB