Analysis

  • max time kernel
    163s
  • max time network
    173s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    20-05-2022 03:38

General

  • Target

    a436f01d3d5abb2d63d9ec5463c0c083546b939036e71163d2aba510958f8f20.exe

  • Size

    599KB

  • MD5

    08862211cb28cc9f8cb03041644ddfa4

  • SHA1

    6a72a8315147fdaf9eefbd60c83833de060f1aba

  • SHA256

    a436f01d3d5abb2d63d9ec5463c0c083546b939036e71163d2aba510958f8f20

  • SHA512

    063bd36a79d2bdb2a95963bf3ce03591b779220682095e5edad469a11bf1bd4599d0533161a062eaa8bff10a0266c1da53c4637e32d61c5d8aa97a5a5381c03e

Score
9/10

Malware Config

Signatures

  • Grants admin privileges 1 TTPs

    Uses net.exe to modify the user's privileges.

  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • Enumerates physical storage devices 1 TTPs

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

  • Runs net.exe
  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious use of SetWindowsHookEx 16 IoCs
  • Suspicious use of WriteProcessMemory 63 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a436f01d3d5abb2d63d9ec5463c0c083546b939036e71163d2aba510958f8f20.exe
    "C:\Users\Admin\AppData\Local\Temp\a436f01d3d5abb2d63d9ec5463c0c083546b939036e71163d2aba510958f8f20.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:988
    • C:\Users\Admin\AppData\Local\Temp\a436f01d3d5abb2d63d9ec5463c0c083546b939036e71163d2aba510958f8f20.exe
      "C:\Users\Admin\AppData\Local\Temp\a436f01d3d5abb2d63d9ec5463c0c083546b939036e71163d2aba510958f8f20.exe"
      2⤵
      • Checks computer location settings
      • Writes to the Master Boot Record (MBR)
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:4388
      • C:\Windows\SysWOW64\net.exe
        net.exe localgroup administrators qq2239823310/add
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4812
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 localgroup administrators qq2239823310/add
          4⤵
            PID:1384
        • C:\Windows\SysWOW64\net.exe
          net.exe user qq2239823310 /add
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:4144
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 user qq2239823310 /add
            4⤵
              PID:5016
          • C:\Windows\SysWOW64\net.exe
            net.exe user Admin
            3⤵
            • Suspicious use of WriteProcessMemory
            PID:4176
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 user Admin
              4⤵
                PID:4656
            • C:\Users\Admin\AppData\Local\Temp\a436f01d3d5abb2d63d9ec5463c0c083546b939036e71163d2aba510958f8f20.exe
              "C:\Users\Admin\AppData\Local\Temp\a436f01d3d5abb2d63d9ec5463c0c083546b939036e71163d2aba510958f8f20.exe"
              3⤵
              • Checks computer location settings
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of SetWindowsHookEx
              • Suspicious use of WriteProcessMemory
              PID:3872
              • C:\Windows\SysWOW64\net.exe
                net.exe user Admin
                4⤵
                • Suspicious use of WriteProcessMemory
                PID:4780
                • C:\Windows\SysWOW64\net1.exe
                  C:\Windows\system32\net1 user Admin
                  5⤵
                    PID:2308
                • C:\Windows\SysWOW64\net.exe
                  net.exe user qq2239823310 /add
                  4⤵
                  • Suspicious use of WriteProcessMemory
                  PID:4744
                  • C:\Windows\SysWOW64\net1.exe
                    C:\Windows\system32\net1 user qq2239823310 /add
                    5⤵
                      PID:2808
                  • C:\Windows\SysWOW64\net.exe
                    net.exe localgroup administrators qq2239823310/add
                    4⤵
                    • Suspicious use of WriteProcessMemory
                    PID:3752
                    • C:\Windows\SysWOW64\net1.exe
                      C:\Windows\system32\net1 localgroup administrators qq2239823310/add
                      5⤵
                        PID:2724
                    • C:\Users\Admin\AppData\Local\Temp\a436f01d3d5abb2d63d9ec5463c0c083546b939036e71163d2aba510958f8f20.exe
                      "C:\Users\Admin\AppData\Local\Temp\a436f01d3d5abb2d63d9ec5463c0c083546b939036e71163d2aba510958f8f20.exe"
                      4⤵
                      • Suspicious behavior: EnumeratesProcesses
                      • Suspicious use of SetWindowsHookEx
                      • Suspicious use of WriteProcessMemory
                      PID:1644
                      • C:\Windows\SysWOW64\net.exe
                        net.exe user Admin
                        5⤵
                        • Suspicious use of WriteProcessMemory
                        PID:4732
                        • C:\Windows\SysWOW64\net1.exe
                          C:\Windows\system32\net1 user Admin
                          6⤵
                            PID:1056
                        • C:\Windows\SysWOW64\net.exe
                          net.exe user qq2239823310 /add
                          5⤵
                          • Suspicious use of WriteProcessMemory
                          PID:3488
                          • C:\Windows\SysWOW64\net1.exe
                            C:\Windows\system32\net1 user qq2239823310 /add
                            6⤵
                              PID:4924
                          • C:\Windows\SysWOW64\net.exe
                            net.exe localgroup administrators qq2239823310/add
                            5⤵
                            • Suspicious use of WriteProcessMemory
                            PID:4972
                            • C:\Windows\SysWOW64\net1.exe
                              C:\Windows\system32\net1 localgroup administrators qq2239823310/add
                              6⤵
                                PID:780

                    Network

                    MITRE ATT&CK Matrix ATT&CK v6

                    Persistence

                    Account Manipulation

                    1
                    T1098

                    Bootkit

                    1
                    T1067

                    Discovery

                    Query Registry

                    1
                    T1012

                    System Information Discovery

                    2
                    T1082

                    Replay Monitor

                    Loading Replay Monitor...

                    Downloads

                    • C:\Users\Admin\AppData\Local\Temp\1.ini
                      Filesize

                      10B

                      MD5

                      568f3f4163773733e3e36e8a29cf0029

                      SHA1

                      ba0c7b47b8fc337926db519c567d9ccfa58a843c

                      SHA256

                      410fee16714cf6db0624a3a9a4e73de4bc18cae5ca7e5d9acf0e9e44aa4133e2

                      SHA512

                      a344b1ee712fff920cc4d29959c59b091b138a5e6d8695d1d6bbbc82e188e25a86d97bfbb1c63c235eaffd14af2eefe88c3123d95b6c1e807a5da30733cf59ba

                    • C:\Users\Admin\AppData\Local\Temp\1.ini
                      Filesize

                      10B

                      MD5

                      568f3f4163773733e3e36e8a29cf0029

                      SHA1

                      ba0c7b47b8fc337926db519c567d9ccfa58a843c

                      SHA256

                      410fee16714cf6db0624a3a9a4e73de4bc18cae5ca7e5d9acf0e9e44aa4133e2

                      SHA512

                      a344b1ee712fff920cc4d29959c59b091b138a5e6d8695d1d6bbbc82e188e25a86d97bfbb1c63c235eaffd14af2eefe88c3123d95b6c1e807a5da30733cf59ba

                    • C:\Users\Admin\AppData\Local\Temp\1.ini
                      Filesize

                      10B

                      MD5

                      568f3f4163773733e3e36e8a29cf0029

                      SHA1

                      ba0c7b47b8fc337926db519c567d9ccfa58a843c

                      SHA256

                      410fee16714cf6db0624a3a9a4e73de4bc18cae5ca7e5d9acf0e9e44aa4133e2

                      SHA512

                      a344b1ee712fff920cc4d29959c59b091b138a5e6d8695d1d6bbbc82e188e25a86d97bfbb1c63c235eaffd14af2eefe88c3123d95b6c1e807a5da30733cf59ba

                    • C:\Users\Admin\AppData\Local\Temp\ExtraDll.dll
                      Filesize

                      199KB

                      MD5

                      2bda137da275d8e4b98c32b5a7725334

                      SHA1

                      4c39e68338f286d791cb054af5a16b80fb102af9

                      SHA256

                      50015d445f3156f3ddde43da651b15a310f6d85a23ee5bdf95c908130ac035b4

                      SHA512

                      ef68c17b18cfabea6ae454bbf066e57c0181d9250f4d4e5b88c2492ec32a1e7173ecdcc678ed120e1ef58f552ec19d14ace75c15c0c3605031b8144a4bba0c45

                    • C:\Users\Admin\AppData\Local\Temp\ExtraDll.dll
                      Filesize

                      199KB

                      MD5

                      2bda137da275d8e4b98c32b5a7725334

                      SHA1

                      4c39e68338f286d791cb054af5a16b80fb102af9

                      SHA256

                      50015d445f3156f3ddde43da651b15a310f6d85a23ee5bdf95c908130ac035b4

                      SHA512

                      ef68c17b18cfabea6ae454bbf066e57c0181d9250f4d4e5b88c2492ec32a1e7173ecdcc678ed120e1ef58f552ec19d14ace75c15c0c3605031b8144a4bba0c45

                    • C:\Users\Admin\AppData\Local\Temp\ExtraDll.dll
                      Filesize

                      199KB

                      MD5

                      2bda137da275d8e4b98c32b5a7725334

                      SHA1

                      4c39e68338f286d791cb054af5a16b80fb102af9

                      SHA256

                      50015d445f3156f3ddde43da651b15a310f6d85a23ee5bdf95c908130ac035b4

                      SHA512

                      ef68c17b18cfabea6ae454bbf066e57c0181d9250f4d4e5b88c2492ec32a1e7173ecdcc678ed120e1ef58f552ec19d14ace75c15c0c3605031b8144a4bba0c45

                    • memory/780-156-0x0000000000000000-mapping.dmp
                    • memory/1056-154-0x0000000000000000-mapping.dmp
                    • memory/1384-138-0x0000000000000000-mapping.dmp
                    • memory/1644-148-0x0000000000000000-mapping.dmp
                    • memory/2308-146-0x0000000000000000-mapping.dmp
                    • memory/2724-147-0x0000000000000000-mapping.dmp
                    • memory/2808-145-0x0000000000000000-mapping.dmp
                    • memory/3488-152-0x0000000000000000-mapping.dmp
                    • memory/3752-144-0x0000000000000000-mapping.dmp
                    • memory/3872-139-0x0000000000000000-mapping.dmp
                    • memory/4144-134-0x0000000000000000-mapping.dmp
                    • memory/4176-133-0x0000000000000000-mapping.dmp
                    • memory/4388-130-0x0000000000000000-mapping.dmp
                    • memory/4656-136-0x0000000000000000-mapping.dmp
                    • memory/4732-151-0x0000000000000000-mapping.dmp
                    • memory/4744-143-0x0000000000000000-mapping.dmp
                    • memory/4780-142-0x0000000000000000-mapping.dmp
                    • memory/4812-135-0x0000000000000000-mapping.dmp
                    • memory/4924-155-0x0000000000000000-mapping.dmp
                    • memory/4972-153-0x0000000000000000-mapping.dmp
                    • memory/5016-137-0x0000000000000000-mapping.dmp