Analysis

  • max time kernel
    35s
  • max time network
    117s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    13-05-2023 10:20

General

  • Target

    qsteemp.exe

  • Size

    165KB

  • MD5

    90cd3202af31b431dcc5e47cf3b8c0d7

  • SHA1

    747f68fb8f122241059c219eeeeadac61e8215be

  • SHA256

    e76e206e8ae24f95a329b4f6ecdf1f22b76b07a8c628c0619b781bdba2d85732

  • SHA512

    b1025ca0dfa86cd6649337bfc6b555a9101fce38955566424955a6fe07782bea41eeaf4f233946eb6be5756b23398129bad98a87c6b07478f787df8bf3235481

  • SSDEEP

    3072:fV6h5WXwyNUD44ykiQbGjlc/SGvjQtbGTl2MRMc:9AuwMPkhbGRc/T6A

Score
10/10

Malware Config

Signatures

  • Gurcu, WhiteSnake

    Gurcu is a malware stealer written in C#.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 2 IoCs
  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Modifies system certificate store 2 TTPs 6 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\qsteemp.exe
    "C:\Users\Admin\AppData\Local\Temp\qsteemp.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1724
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "qsteemp" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\qsteemp.exe" &&START "" "C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe"
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:552
      • C:\Windows\system32\chcp.com
        chcp 65001
        3⤵
          PID:1152
        • C:\Windows\system32\PING.EXE
          ping 127.0.0.1
          3⤵
          • Runs ping.exe
          PID:772
        • C:\Windows\system32\schtasks.exe
          schtasks /create /tn "qsteemp" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe" /rl HIGHEST /f
          3⤵
          • Creates scheduled task(s)
          PID:980
        • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
          "C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe"
          3⤵
          • Executes dropped EXE
          • Modifies system certificate store
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1844
          • C:\Windows\system32\WerFault.exe
            C:\Windows\system32\WerFault.exe -u -p 1844 -s 1792
            4⤵
            • Program crash
            PID:772
    • C:\Windows\system32\taskeng.exe
      taskeng.exe {14A36554-D04D-4664-84C8-87A9960560EB} S-1-5-21-2961826002-3968192592-354541192-1000:HVMHZIYD\Admin:Interactive:[1]
      1⤵
      • Suspicious use of WriteProcessMemory
      PID:768
      • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        2⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:976
        • C:\Windows\system32\WerFault.exe
          C:\Windows\system32\WerFault.exe -u -p 976 -s 1816
          3⤵
          • Program crash
          PID:1644

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

      Filesize

      62KB

      MD5

      3ac860860707baaf32469fa7cc7c0192

      SHA1

      c33c2acdaba0e6fa41fd2f00f186804722477639

      SHA256

      d015145d551ecd14916270efad773bbc9fd57fad2228d2c24559f696c961d904

      SHA512

      d62ad2408c969a95550fb87efda50f988770ba5e39972041bf85924275baf156b8bec309ecc6409e5acdd37ec175dea40eff921ab58933b5b5b5d35a6147567c

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

      Filesize

      62KB

      MD5

      3ac860860707baaf32469fa7cc7c0192

      SHA1

      c33c2acdaba0e6fa41fd2f00f186804722477639

      SHA256

      d015145d551ecd14916270efad773bbc9fd57fad2228d2c24559f696c961d904

      SHA512

      d62ad2408c969a95550fb87efda50f988770ba5e39972041bf85924275baf156b8bec309ecc6409e5acdd37ec175dea40eff921ab58933b5b5b5d35a6147567c

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

      Filesize

      344B

      MD5

      632e49994f03ef7fe37aecabcd966841

      SHA1

      292ae6dab208bbc069093b7f30f940e1f12d4891

      SHA256

      a400b9a6bc84b34f2bead89d027198596ddea65c312c856c5e63c01dfd0cf368

      SHA512

      93e66243272bb1b39f8a9d47eacb1c3673e0ea61a2574a8ddc505791f90c08d2ff23211300480893c8bab9e16a06fc2508cc6a840a5a5b1ff61fa7bfa0613ec7

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

      Filesize

      344B

      MD5

      884c76f41f4069fd73a93270a7587f84

      SHA1

      3a3fecce1c640720cfda74515166c4b6971bfd8d

      SHA256

      03e1d629240c5b51de9bee2df904d468136a0ef1441e0b1a8c6fc117e4dae856

      SHA512

      8e25ffed989d1b34302ff3a4585b5077be1337cba5260fb9a3c60fc8ac6f139ffcd650a2c077d18f21a1377f2ce0ec5c140719daa98aa449ada5d2da473ad8ce

    • C:\Users\Admin\AppData\Local\6kfrvwd31o\port.dat

      Filesize

      4B

      MD5

      d04d42cdf14579cd294e5079e0745411

      SHA1

      09d10c328b38fb3a0597cb0194ea59e6c74bc594

      SHA256

      725300467c1440e53c813f531cd7f6b0624c383ecd5b3e455c7c329f58a50ea7

      SHA512

      a4b2576e820d529176a1f647d5d4268e8a6ef81cd61f7a124c37c7a2c27c4d6ec567186f44af1fe6b555c04dd0555d0797583feda8775bb8858e3e03303e159d

    • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe

      Filesize

      165KB

      MD5

      90cd3202af31b431dcc5e47cf3b8c0d7

      SHA1

      747f68fb8f122241059c219eeeeadac61e8215be

      SHA256

      e76e206e8ae24f95a329b4f6ecdf1f22b76b07a8c628c0619b781bdba2d85732

      SHA512

      b1025ca0dfa86cd6649337bfc6b555a9101fce38955566424955a6fe07782bea41eeaf4f233946eb6be5756b23398129bad98a87c6b07478f787df8bf3235481

    • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe

      Filesize

      165KB

      MD5

      90cd3202af31b431dcc5e47cf3b8c0d7

      SHA1

      747f68fb8f122241059c219eeeeadac61e8215be

      SHA256

      e76e206e8ae24f95a329b4f6ecdf1f22b76b07a8c628c0619b781bdba2d85732

      SHA512

      b1025ca0dfa86cd6649337bfc6b555a9101fce38955566424955a6fe07782bea41eeaf4f233946eb6be5756b23398129bad98a87c6b07478f787df8bf3235481

    • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe

      Filesize

      165KB

      MD5

      90cd3202af31b431dcc5e47cf3b8c0d7

      SHA1

      747f68fb8f122241059c219eeeeadac61e8215be

      SHA256

      e76e206e8ae24f95a329b4f6ecdf1f22b76b07a8c628c0619b781bdba2d85732

      SHA512

      b1025ca0dfa86cd6649337bfc6b555a9101fce38955566424955a6fe07782bea41eeaf4f233946eb6be5756b23398129bad98a87c6b07478f787df8bf3235481

    • C:\Users\Admin\AppData\Local\Temp\Cab49B1.tmp

      Filesize

      61KB

      MD5

      fc4666cbca561e864e7fdf883a9e6661

      SHA1

      2f8d6094c7a34bf12ea0bbf0d51ee9c5bb7939a5

      SHA256

      10f3deb6c452d749a7451b5d065f4c0449737e5ee8a44f4d15844b503141e65b

      SHA512

      c71f54b571e01f247f072be4bbebdf5d8410b67eb79a61e7e0d9853fe857ab9bd12f53e6af3394b935560178107291fc4be351b27deb388eba90ba949633d57d

    • C:\Users\Admin\AppData\Local\Temp\Tar4B0F.tmp

      Filesize

      164KB

      MD5

      4ff65ad929cd9a367680e0e5b1c08166

      SHA1

      c0af0d4396bd1f15c45f39d3b849ba444233b3a2

      SHA256

      c8733c93cc5aaf5ca206d06af22ee8dbdec764fb5085019a6a9181feb9dfdee6

      SHA512

      f530dc0d024a5a3b8903ffaaa41b608a5ccdd6da4ba1949f2c2e55a9fca475fec5c8d2119b5763cabe7ef1c3788fb9dcac621869db51d65b1d83cfe404fb4c27

    • memory/976-133-0x0000000002260000-0x00000000022E0000-memory.dmp

      Filesize

      512KB

    • memory/976-154-0x0000000002260000-0x00000000022E0000-memory.dmp

      Filesize

      512KB

    • memory/1724-54-0x00000000009F0000-0x0000000000A20000-memory.dmp

      Filesize

      192KB

    • memory/1724-55-0x000000001AAF0000-0x000000001AB70000-memory.dmp

      Filesize

      512KB

    • memory/1844-62-0x000000001A970000-0x000000001A9F0000-memory.dmp

      Filesize

      512KB

    • memory/1844-134-0x000000001A970000-0x000000001A9F0000-memory.dmp

      Filesize

      512KB

    • memory/1844-61-0x0000000000180000-0x00000000001B0000-memory.dmp

      Filesize

      192KB