Resubmissions

17-04-2023 11:35

230417-nqbpyadh76 10

23-02-2023 15:13

230223-slr9caab3w 10

Analysis

  • max time kernel
    150s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23-02-2023 15:13

General

  • Target

    tmp.exe

  • Size

    25KB

  • MD5

    30b5426ee9183f43fba9a8a6b6b32b97

  • SHA1

    d0b8cde6d8c38e294ce6275b0f935677b07d2202

  • SHA256

    e18cf6502122b168dac6c932cd89739e313154ee9b73d6ddd692d4ad990aceb0

  • SHA512

    adef79c0748b1e8c274f93879c1c068e0d54b88de94fbb01d4d51bd222a6493f8d2cc68f53adab5407bd59249dfa2fdbc8f511bbec3613772591b0ea4d79afaf

  • SSDEEP

    96:jFQgbeIBVLyrgoJ/sTfNILBevmXR5MMRWnwLoLEk8LfjNiRB4e3T3ew5tvEzNt:jFhyIaUo/sTfNILwEfdRTLat8LLGTvu

Malware Config

Extracted

Family

purecrypter

C2

http://argentum.com.br/well-known/acme-challenge/k/h/d/g/Pjogwzrhh.bmp

http://argentum.com.br/well-known/acme-challenge/k/h/d/g/Xzcrd.png

Signatures

  • AgentTesla

    Agent Tesla is a remote access tool (RAT) written in visual basic.

  • Detects Smokeloader packer 3 IoCs
  • PureCrypter

    PureCrypter is a .NET malware loader first seen in early 2021.

  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses Microsoft Outlook profiles 1 TTPs 6 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Looks up external IP address via web service 2 IoCs

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

  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 13 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 44 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.

  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmp.exe
    "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4640
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3588
    • C:\Users\Admin\AppData\Local\Temp\tmp.exe
      C:\Users\Admin\AppData\Local\Temp\tmp.exe
      2⤵
      • Checks SCSI registry key(s)
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      PID:2932
  • C:\Users\Admin\AppData\Local\Temp\9E15.exe
    C:\Users\Admin\AppData\Local\Temp\9E15.exe
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4420
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:4004
    • C:\Users\Admin\AppData\Local\Temp\9E15.exe
      C:\Users\Admin\AppData\Local\Temp\9E15.exe
      2⤵
      • Executes dropped EXE
      • Accesses Microsoft Outlook profiles
      • Adds Run key to start application
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • outlook_office_path
      • outlook_win_path
      PID:1428
  • C:\Windows\SysWOW64\explorer.exe
    C:\Windows\SysWOW64\explorer.exe
    1⤵
    • Accesses Microsoft Outlook profiles
    PID:2228
  • C:\Windows\explorer.exe
    C:\Windows\explorer.exe
    1⤵
      PID:3608
    • C:\Windows\SysWOW64\explorer.exe
      C:\Windows\SysWOW64\explorer.exe
      1⤵
        PID:1128
      • C:\Windows\explorer.exe
        C:\Windows\explorer.exe
        1⤵
          PID:4832
        • C:\Windows\SysWOW64\explorer.exe
          C:\Windows\SysWOW64\explorer.exe
          1⤵
            PID:4552
          • C:\Windows\explorer.exe
            C:\Windows\explorer.exe
            1⤵
              PID:3884

            Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\9E15.exe.log

              Filesize

              1KB

              MD5

              3a9188331a78f1dbce606db64b841fcb

              SHA1

              8e2c99b7c477d06591a856a4ea3e1e214719eee8

              SHA256

              db4137e258a0f6159fda559a5f6dd2704be0582c3f0586f65040c7ad1eb68451

              SHA512

              d1a994610a045d89d5d306866c24ae56bf16555414b8f63f632552568e67b5586f26d5a17a1f0a55ada376730298e6d856e9161828d4eae9decfa4e015e0e90a

            • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

              Filesize

              1KB

              MD5

              4280e36a29fa31c01e4d8b2ba726a0d8

              SHA1

              c485c2c9ce0a99747b18d899b71dfa9a64dabe32

              SHA256

              e2486a1bdcba80dad6dd6210d7374bd70ae196a523c06ceda71370fd3ea78359

              SHA512

              494fe5f0ade03669e5830bed93c964d69b86629440148d7b0881cf53203fd89443ebff9b4d1ee9d96244f62af6edede622d9eacba37f80f389a0d522e4ad4ea4

            • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\ModuleAnalysisCache

              Filesize

              53KB

              MD5

              06ad34f9739c5159b4d92d702545bd49

              SHA1

              9152a0d4f153f3f40f7e606be75f81b582ee0c17

              SHA256

              474813b625f00710f29fa3b488235a6a22201851efb336bddf60d7d24a66bfba

              SHA512

              c272cd28ae164d465b779163ba9eca6a28261376414c6bbdfbd9f2128adb7f7ff1420e536b4d6000d0301ded2ec9036bc5c657588458bff41f176bdce8d74f92

            • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

              Filesize

              16KB

              MD5

              0a26c154b1d899793338a7b753c52685

              SHA1

              5e68411adb4600edeebe84160b2b4a61e90e392a

              SHA256

              7086adc943cada030601e0685819fdfc2b322c2d150f6f1d63681e6fdc16dfc9

              SHA512

              e079a722d02669d1f59830a0808bab61651c4828b853366b2745a8999ab4233ff9e66927cd3b9f569fcea5efd0dc388ddf3b0a2614fe87312a01a9d35a9bf206

            • C:\Users\Admin\AppData\Local\Temp\9E15.exe

              Filesize

              25KB

              MD5

              378afc012094817b26459db696071baa

              SHA1

              e498fbb56ca9cbba1dc4ffea0840fcefe5a5a951

              SHA256

              d8ae15697fbd126606cd0e6e38ad4859667feca010786ae9fffef56c948a7ea3

              SHA512

              79c76d7ca2762460c7d338cfc92ffac56103795a262e04ab3c8ef8db1d33065b79508a003715c1435160fa6044170bfe8d7f459e687871ba386998dd88363828

            • C:\Users\Admin\AppData\Local\Temp\9E15.exe

              Filesize

              25KB

              MD5

              378afc012094817b26459db696071baa

              SHA1

              e498fbb56ca9cbba1dc4ffea0840fcefe5a5a951

              SHA256

              d8ae15697fbd126606cd0e6e38ad4859667feca010786ae9fffef56c948a7ea3

              SHA512

              79c76d7ca2762460c7d338cfc92ffac56103795a262e04ab3c8ef8db1d33065b79508a003715c1435160fa6044170bfe8d7f459e687871ba386998dd88363828

            • C:\Users\Admin\AppData\Local\Temp\9E15.exe

              Filesize

              25KB

              MD5

              378afc012094817b26459db696071baa

              SHA1

              e498fbb56ca9cbba1dc4ffea0840fcefe5a5a951

              SHA256

              d8ae15697fbd126606cd0e6e38ad4859667feca010786ae9fffef56c948a7ea3

              SHA512

              79c76d7ca2762460c7d338cfc92ffac56103795a262e04ab3c8ef8db1d33065b79508a003715c1435160fa6044170bfe8d7f459e687871ba386998dd88363828

            • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_pbvvt3gl.gf1.ps1

              Filesize

              60B

              MD5

              d17fe0a3f47be24a6453e9ef58c94641

              SHA1

              6ab83620379fc69f80c0242105ddffd7d98d5d9d

              SHA256

              96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

              SHA512

              5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

            • memory/1128-233-0x0000000000760000-0x00000000007CB000-memory.dmp

              Filesize

              428KB

            • memory/1128-206-0x0000000000DB0000-0x0000000000DBB000-memory.dmp

              Filesize

              44KB

            • memory/1128-208-0x0000000000760000-0x00000000007CB000-memory.dmp

              Filesize

              428KB

            • memory/1128-209-0x0000000000DB0000-0x0000000000DBB000-memory.dmp

              Filesize

              44KB

            • memory/1428-258-0x00000000057F0000-0x0000000005800000-memory.dmp

              Filesize

              64KB

            • memory/1428-251-0x00000000075B0000-0x0000000007772000-memory.dmp

              Filesize

              1.8MB

            • memory/1428-249-0x0000000007320000-0x000000000732A000-memory.dmp

              Filesize

              40KB

            • memory/1428-240-0x0000000000400000-0x0000000000430000-memory.dmp

              Filesize

              192KB

            • memory/1428-245-0x00000000057F0000-0x0000000005800000-memory.dmp

              Filesize

              64KB

            • memory/1428-250-0x0000000007380000-0x00000000073D0000-memory.dmp

              Filesize

              320KB

            • memory/1428-244-0x0000000005E80000-0x0000000006424000-memory.dmp

              Filesize

              5.6MB

            • memory/1428-248-0x0000000007120000-0x00000000071B2000-memory.dmp

              Filesize

              584KB

            • memory/2228-184-0x0000000000760000-0x00000000007CB000-memory.dmp

              Filesize

              428KB

            • memory/2228-181-0x0000000000760000-0x00000000007CB000-memory.dmp

              Filesize

              428KB

            • memory/2228-205-0x0000000000760000-0x00000000007CB000-memory.dmp

              Filesize

              428KB

            • memory/2228-183-0x0000000000C40000-0x0000000000CC0000-memory.dmp

              Filesize

              512KB

            • memory/2932-166-0x0000000000400000-0x0000000000409000-memory.dmp

              Filesize

              36KB

            • memory/2932-164-0x0000000000400000-0x0000000000409000-memory.dmp

              Filesize

              36KB

            • memory/2932-162-0x0000000000400000-0x0000000000409000-memory.dmp

              Filesize

              36KB

            • memory/3196-165-0x0000000002690000-0x00000000026A6000-memory.dmp

              Filesize

              88KB

            • memory/3588-157-0x0000000004EA0000-0x0000000004EB0000-memory.dmp

              Filesize

              64KB

            • memory/3588-156-0x0000000004EA0000-0x0000000004EB0000-memory.dmp

              Filesize

              64KB

            • memory/3588-153-0x0000000007900000-0x0000000007F7A000-memory.dmp

              Filesize

              6.5MB

            • memory/3588-136-0x0000000002CA0000-0x0000000002CD6000-memory.dmp

              Filesize

              216KB

            • memory/3588-137-0x00000000054E0000-0x0000000005B08000-memory.dmp

              Filesize

              6.2MB

            • memory/3588-158-0x0000000004EA0000-0x0000000004EB0000-memory.dmp

              Filesize

              64KB

            • memory/3588-138-0x0000000005BC0000-0x0000000005C26000-memory.dmp

              Filesize

              408KB

            • memory/3588-152-0x0000000004EA0000-0x0000000004EB0000-memory.dmp

              Filesize

              64KB

            • memory/3588-139-0x0000000005C30000-0x0000000005C96000-memory.dmp

              Filesize

              408KB

            • memory/3588-142-0x0000000004EA0000-0x0000000004EB0000-memory.dmp

              Filesize

              64KB

            • memory/3588-150-0x0000000004EA0000-0x0000000004EB0000-memory.dmp

              Filesize

              64KB

            • memory/3588-151-0x0000000006290000-0x00000000062AE000-memory.dmp

              Filesize

              120KB

            • memory/3588-154-0x0000000006790000-0x00000000067AA000-memory.dmp

              Filesize

              104KB

            • memory/3608-194-0x00000000008B0000-0x00000000008BC000-memory.dmp

              Filesize

              48KB

            • memory/3608-204-0x00000000008B0000-0x00000000008BC000-memory.dmp

              Filesize

              48KB

            • memory/3884-230-0x0000000000360000-0x0000000000369000-memory.dmp

              Filesize

              36KB

            • memory/3884-229-0x0000000000F00000-0x0000000000F0C000-memory.dmp

              Filesize

              48KB

            • memory/3884-231-0x0000000000F00000-0x0000000000F0C000-memory.dmp

              Filesize

              48KB

            • memory/3884-238-0x0000000000360000-0x0000000000369000-memory.dmp

              Filesize

              36KB

            • memory/4004-234-0x00000000012F0000-0x0000000001300000-memory.dmp

              Filesize

              64KB

            • memory/4004-210-0x00000000012F0000-0x0000000001300000-memory.dmp

              Filesize

              64KB

            • memory/4004-211-0x00000000012F0000-0x0000000001300000-memory.dmp

              Filesize

              64KB

            • memory/4004-235-0x00000000012F0000-0x0000000001300000-memory.dmp

              Filesize

              64KB

            • memory/4420-232-0x00000000052A0000-0x00000000052B0000-memory.dmp

              Filesize

              64KB

            • memory/4420-182-0x00000000052A0000-0x00000000052B0000-memory.dmp

              Filesize

              64KB

            • memory/4420-179-0x0000000000980000-0x000000000098C000-memory.dmp

              Filesize

              48KB

            • memory/4552-226-0x0000000000360000-0x0000000000369000-memory.dmp

              Filesize

              36KB

            • memory/4552-237-0x00000000007E0000-0x00000000007EF000-memory.dmp

              Filesize

              60KB

            • memory/4552-227-0x00000000007E0000-0x00000000007EF000-memory.dmp

              Filesize

              60KB

            • memory/4552-228-0x0000000000360000-0x0000000000369000-memory.dmp

              Filesize

              36KB

            • memory/4640-155-0x0000000005110000-0x0000000005120000-memory.dmp

              Filesize

              64KB

            • memory/4640-133-0x00000000004C0000-0x00000000004CC000-memory.dmp

              Filesize

              48KB

            • memory/4640-135-0x00000000064C0000-0x00000000064E2000-memory.dmp

              Filesize

              136KB

            • memory/4640-134-0x0000000005110000-0x0000000005120000-memory.dmp

              Filesize

              64KB

            • memory/4832-225-0x00000000007E0000-0x00000000007EF000-memory.dmp

              Filesize

              60KB

            • memory/4832-222-0x00000000007E0000-0x00000000007EF000-memory.dmp

              Filesize

              60KB

            • memory/4832-224-0x00000000012F0000-0x0000000001300000-memory.dmp

              Filesize

              64KB

            • memory/4832-236-0x00000000012F0000-0x0000000001300000-memory.dmp

              Filesize

              64KB