Analysis

  • max time kernel
    105s
  • max time network
    113s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    07/08/2021, 22:17

General

  • Target

    bbe006688e5f74473a5e248bc83651cbb7e9efbe8410abb8d8b84b4a59ed7750.exe

  • Size

    1.3MB

  • MD5

    8663ed0caec9adcb980a4a7ea23e7984

  • SHA1

    e6dcb19362e88b50ab1990e7032437072f104e98

  • SHA256

    bbe006688e5f74473a5e248bc83651cbb7e9efbe8410abb8d8b84b4a59ed7750

  • SHA512

    fd75e6bde035e103e84322411ca7b4107f1673d03170b940af3066f9f4eb58b063ec244302c8dccab87f5816e2b55a177dc1c1d7f498742fd8e0f24fb64317a9

Malware Config

Extracted

Family

oski

C2

fine.le-pearl.com

Signatures

  • Oski

    Oski is an infostealer targeting browser data, crypto wallets.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Checks installed software on the system 1 TTPs

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

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 1 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Kills process with taskkill 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 16 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bbe006688e5f74473a5e248bc83651cbb7e9efbe8410abb8d8b84b4a59ed7750.exe
    "C:\Users\Admin\AppData\Local\Temp\bbe006688e5f74473a5e248bc83651cbb7e9efbe8410abb8d8b84b4a59ed7750.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3628
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\bbe006688e5f74473a5e248bc83651cbb7e9efbe8410abb8d8b84b4a59ed7750.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1484
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\ImauUieIe.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3172
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ImauUieIe" /XML "C:\Users\Admin\AppData\Local\Temp\tmpEDF0.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:3288
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\ImauUieIe.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1596
    • C:\Users\Admin\AppData\Local\Temp\bbe006688e5f74473a5e248bc83651cbb7e9efbe8410abb8d8b84b4a59ed7750.exe
      "C:\Users\Admin\AppData\Local\Temp\bbe006688e5f74473a5e248bc83651cbb7e9efbe8410abb8d8b84b4a59ed7750.exe"
      2⤵
        PID:3792
      • C:\Users\Admin\AppData\Local\Temp\bbe006688e5f74473a5e248bc83651cbb7e9efbe8410abb8d8b84b4a59ed7750.exe
        "C:\Users\Admin\AppData\Local\Temp\bbe006688e5f74473a5e248bc83651cbb7e9efbe8410abb8d8b84b4a59ed7750.exe"
        2⤵
          PID:1904
        • C:\Users\Admin\AppData\Local\Temp\bbe006688e5f74473a5e248bc83651cbb7e9efbe8410abb8d8b84b4a59ed7750.exe
          "C:\Users\Admin\AppData\Local\Temp\bbe006688e5f74473a5e248bc83651cbb7e9efbe8410abb8d8b84b4a59ed7750.exe"
          2⤵
            PID:3876
          • C:\Users\Admin\AppData\Local\Temp\bbe006688e5f74473a5e248bc83651cbb7e9efbe8410abb8d8b84b4a59ed7750.exe
            "C:\Users\Admin\AppData\Local\Temp\bbe006688e5f74473a5e248bc83651cbb7e9efbe8410abb8d8b84b4a59ed7750.exe"
            2⤵
            • Checks processor information in registry
            • Suspicious use of WriteProcessMemory
            PID:688
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\System32\cmd.exe" /c taskkill /pid 688 & erase C:\Users\Admin\AppData\Local\Temp\bbe006688e5f74473a5e248bc83651cbb7e9efbe8410ab' & RD /S /Q C:\\ProgramData\\021390826612043\\* & exit
              3⤵
              • Suspicious use of WriteProcessMemory
              PID:2792
              • C:\Windows\SysWOW64\taskkill.exe
                taskkill /pid 688
                4⤵
                • Kills process with taskkill
                • Suspicious use of AdjustPrivilegeToken
                PID:3416

        Network

              MITRE ATT&CK Enterprise v6

              Replay Monitor

              Loading Replay Monitor...

              Downloads

              • memory/688-150-0x0000000000400000-0x0000000000438000-memory.dmp

                Filesize

                224KB

              • memory/688-142-0x0000000000400000-0x0000000000438000-memory.dmp

                Filesize

                224KB

              • memory/1484-143-0x0000000006850000-0x0000000006851000-memory.dmp

                Filesize

                4KB

              • memory/1484-166-0x0000000007FB0000-0x0000000007FB1000-memory.dmp

                Filesize

                4KB

              • memory/1484-129-0x0000000006740000-0x0000000006741000-memory.dmp

                Filesize

                4KB

              • memory/1484-130-0x0000000006E90000-0x0000000006E91000-memory.dmp

                Filesize

                4KB

              • memory/1484-187-0x0000000008E90000-0x0000000008EC3000-memory.dmp

                Filesize

                204KB

              • memory/1484-136-0x0000000006E10000-0x0000000006E11000-memory.dmp

                Filesize

                4KB

              • memory/1484-137-0x0000000007530000-0x0000000007531000-memory.dmp

                Filesize

                4KB

              • memory/1484-139-0x00000000076B0000-0x00000000076B1000-memory.dmp

                Filesize

                4KB

              • memory/1484-203-0x000000007F610000-0x000000007F611000-memory.dmp

                Filesize

                4KB

              • memory/1484-140-0x0000000007800000-0x0000000007801000-memory.dmp

                Filesize

                4KB

              • memory/1484-216-0x0000000008FC0000-0x0000000008FC1000-memory.dmp

                Filesize

                4KB

              • memory/1484-145-0x0000000006852000-0x0000000006853000-memory.dmp

                Filesize

                4KB

              • memory/1484-241-0x0000000006853000-0x0000000006854000-memory.dmp

                Filesize

                4KB

              • memory/1484-201-0x0000000008150000-0x0000000008151000-memory.dmp

                Filesize

                4KB

              • memory/1596-245-0x0000000006F73000-0x0000000006F74000-memory.dmp

                Filesize

                4KB

              • memory/1596-238-0x000000007ED60000-0x000000007ED61000-memory.dmp

                Filesize

                4KB

              • memory/1596-164-0x0000000006F70000-0x0000000006F71000-memory.dmp

                Filesize

                4KB

              • memory/1596-165-0x0000000006F72000-0x0000000006F73000-memory.dmp

                Filesize

                4KB

              • memory/3172-148-0x0000000004630000-0x0000000004631000-memory.dmp

                Filesize

                4KB

              • memory/3172-162-0x0000000008190000-0x0000000008191000-memory.dmp

                Filesize

                4KB

              • memory/3172-160-0x00000000078C0000-0x00000000078C1000-memory.dmp

                Filesize

                4KB

              • memory/3172-151-0x0000000004632000-0x0000000004633000-memory.dmp

                Filesize

                4KB

              • memory/3172-244-0x0000000004633000-0x0000000004634000-memory.dmp

                Filesize

                4KB

              • memory/3172-208-0x000000007FC50000-0x000000007FC51000-memory.dmp

                Filesize

                4KB

              • memory/3628-123-0x0000000007800000-0x0000000007833000-memory.dmp

                Filesize

                204KB

              • memory/3628-114-0x00000000001E0000-0x00000000001E1000-memory.dmp

                Filesize

                4KB

              • memory/3628-122-0x00000000098E0000-0x000000000997A000-memory.dmp

                Filesize

                616KB

              • memory/3628-121-0x0000000002550000-0x000000000255D000-memory.dmp

                Filesize

                52KB

              • memory/3628-120-0x0000000004EA0000-0x0000000004EA1000-memory.dmp

                Filesize

                4KB

              • memory/3628-119-0x0000000004CC0000-0x0000000004CC1000-memory.dmp

                Filesize

                4KB

              • memory/3628-118-0x0000000004BF0000-0x00000000050EE000-memory.dmp

                Filesize

                5.0MB

              • memory/3628-117-0x0000000004BF0000-0x0000000004BF1000-memory.dmp

                Filesize

                4KB

              • memory/3628-116-0x00000000050F0000-0x00000000050F1000-memory.dmp

                Filesize

                4KB