Analysis

  • max time kernel
    151s
  • max time network
    103s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230221-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230221-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23-02-2023 09:40

General

  • Target

    0x000800000001231c-66.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\0x000800000001231c-66.exe
    "C:\Users\Admin\AppData\Local\Temp\0x000800000001231c-66.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:5056
    • 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:1252
    • C:\Users\Admin\AppData\Local\Temp\0x000800000001231c-66.exe
      C:\Users\Admin\AppData\Local\Temp\0x000800000001231c-66.exe
      2⤵
      • Checks SCSI registry key(s)
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      PID:988
  • C:\Users\Admin\AppData\Local\Temp\7CB2.exe
    C:\Users\Admin\AppData\Local\Temp\7CB2.exe
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3320
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:4028
    • C:\Users\Admin\AppData\Local\Temp\7CB2.exe
      C:\Users\Admin\AppData\Local\Temp\7CB2.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:3640
  • C:\Windows\SysWOW64\explorer.exe
    C:\Windows\SysWOW64\explorer.exe
    1⤵
    • Accesses Microsoft Outlook profiles
    PID:4960
  • C:\Windows\explorer.exe
    C:\Windows\explorer.exe
    1⤵
      PID:4676
    • C:\Windows\SysWOW64\explorer.exe
      C:\Windows\SysWOW64\explorer.exe
      1⤵
        PID:3188
      • C:\Windows\explorer.exe
        C:\Windows\explorer.exe
        1⤵
          PID:1468
        • C:\Windows\SysWOW64\explorer.exe
          C:\Windows\SysWOW64\explorer.exe
          1⤵
            PID:2180
          • C:\Windows\explorer.exe
            C:\Windows\explorer.exe
            1⤵
              PID:1460

            Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\7CB2.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

              51861f2e16a37d616ad1dff77cd8e578

              SHA1

              cf59c42d22c196b96ffbdc3cbae187ed4a63e55c

              SHA256

              64b519b7ad0187fbed278f9f80fcc77ade9cab4a02896a65aa8aa3d5be69b8c9

              SHA512

              af8aa8be52989258cbac391546d57d519288864ea8d3b829571a65b78406f9e7ceab9b9839ee496badbb3a597d71af386c6fefd99c4fd8cf3efdbfd535e5c087

            • C:\Users\Admin\AppData\Local\Temp\7CB2.exe

              Filesize

              25KB

              MD5

              378afc012094817b26459db696071baa

              SHA1

              e498fbb56ca9cbba1dc4ffea0840fcefe5a5a951

              SHA256

              d8ae15697fbd126606cd0e6e38ad4859667feca010786ae9fffef56c948a7ea3

              SHA512

              79c76d7ca2762460c7d338cfc92ffac56103795a262e04ab3c8ef8db1d33065b79508a003715c1435160fa6044170bfe8d7f459e687871ba386998dd88363828

            • C:\Users\Admin\AppData\Local\Temp\7CB2.exe

              Filesize

              25KB

              MD5

              378afc012094817b26459db696071baa

              SHA1

              e498fbb56ca9cbba1dc4ffea0840fcefe5a5a951

              SHA256

              d8ae15697fbd126606cd0e6e38ad4859667feca010786ae9fffef56c948a7ea3

              SHA512

              79c76d7ca2762460c7d338cfc92ffac56103795a262e04ab3c8ef8db1d33065b79508a003715c1435160fa6044170bfe8d7f459e687871ba386998dd88363828

            • C:\Users\Admin\AppData\Local\Temp\7CB2.exe

              Filesize

              25KB

              MD5

              378afc012094817b26459db696071baa

              SHA1

              e498fbb56ca9cbba1dc4ffea0840fcefe5a5a951

              SHA256

              d8ae15697fbd126606cd0e6e38ad4859667feca010786ae9fffef56c948a7ea3

              SHA512

              79c76d7ca2762460c7d338cfc92ffac56103795a262e04ab3c8ef8db1d33065b79508a003715c1435160fa6044170bfe8d7f459e687871ba386998dd88363828

            • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mnh44vcm.20w.ps1

              Filesize

              60B

              MD5

              d17fe0a3f47be24a6453e9ef58c94641

              SHA1

              6ab83620379fc69f80c0242105ddffd7d98d5d9d

              SHA256

              96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

              SHA512

              5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

            • memory/988-162-0x0000000000400000-0x0000000000409000-memory.dmp

              Filesize

              36KB

            • memory/988-164-0x0000000000400000-0x0000000000409000-memory.dmp

              Filesize

              36KB

            • memory/988-166-0x0000000000400000-0x0000000000409000-memory.dmp

              Filesize

              36KB

            • memory/1252-156-0x0000000002DB0000-0x0000000002DC0000-memory.dmp

              Filesize

              64KB

            • memory/1252-137-0x0000000005940000-0x0000000005F68000-memory.dmp

              Filesize

              6.2MB

            • memory/1252-139-0x0000000002DB0000-0x0000000002DC0000-memory.dmp

              Filesize

              64KB

            • memory/1252-138-0x0000000006020000-0x0000000006086000-memory.dmp

              Filesize

              408KB

            • memory/1252-136-0x00000000031B0000-0x00000000031E6000-memory.dmp

              Filesize

              216KB

            • memory/1252-157-0x0000000002DB0000-0x0000000002DC0000-memory.dmp

              Filesize

              64KB

            • memory/1252-158-0x0000000002DB0000-0x0000000002DC0000-memory.dmp

              Filesize

              64KB

            • memory/1252-153-0x0000000006C70000-0x0000000006C8A000-memory.dmp

              Filesize

              104KB

            • memory/1252-152-0x0000000007DF0000-0x000000000846A000-memory.dmp

              Filesize

              6.5MB

            • memory/1252-141-0x0000000002DB0000-0x0000000002DC0000-memory.dmp

              Filesize

              64KB

            • memory/1252-151-0x0000000006780000-0x000000000679E000-memory.dmp

              Filesize

              120KB

            • memory/1252-140-0x0000000006140000-0x00000000061A6000-memory.dmp

              Filesize

              408KB

            • memory/1252-154-0x0000000002DB0000-0x0000000002DC0000-memory.dmp

              Filesize

              64KB

            • memory/1460-228-0x0000000000ED0000-0x0000000000EDC000-memory.dmp

              Filesize

              48KB

            • memory/1460-236-0x0000000000EE0000-0x0000000000EE6000-memory.dmp

              Filesize

              24KB

            • memory/1460-230-0x0000000000ED0000-0x0000000000EDC000-memory.dmp

              Filesize

              48KB

            • memory/1460-229-0x0000000000EE0000-0x0000000000EE6000-memory.dmp

              Filesize

              24KB

            • memory/1468-234-0x00000000012E0000-0x00000000012E9000-memory.dmp

              Filesize

              36KB

            • memory/1468-225-0x00000000012D0000-0x00000000012DF000-memory.dmp

              Filesize

              60KB

            • memory/1468-222-0x00000000012D0000-0x00000000012DF000-memory.dmp

              Filesize

              60KB

            • memory/2180-227-0x0000000000B80000-0x0000000000B89000-memory.dmp

              Filesize

              36KB

            • memory/2180-226-0x0000000000B90000-0x0000000000B95000-memory.dmp

              Filesize

              20KB

            • memory/2180-224-0x0000000000B80000-0x0000000000B89000-memory.dmp

              Filesize

              36KB

            • memory/2180-235-0x0000000000B90000-0x0000000000B95000-memory.dmp

              Filesize

              20KB

            • memory/3144-165-0x0000000002B30000-0x0000000002B46000-memory.dmp

              Filesize

              88KB

            • memory/3188-206-0x0000000001250000-0x000000000125B000-memory.dmp

              Filesize

              44KB

            • memory/3188-219-0x0000000001250000-0x000000000125B000-memory.dmp

              Filesize

              44KB

            • memory/3188-218-0x0000000001260000-0x0000000001267000-memory.dmp

              Filesize

              28KB

            • memory/3188-232-0x0000000001260000-0x0000000001267000-memory.dmp

              Filesize

              28KB

            • memory/3320-231-0x0000000005170000-0x0000000005180000-memory.dmp

              Filesize

              64KB

            • memory/3320-179-0x00000000007C0000-0x00000000007CC000-memory.dmp

              Filesize

              48KB

            • memory/3320-181-0x0000000005170000-0x0000000005180000-memory.dmp

              Filesize

              64KB

            • memory/3640-256-0x0000000005170000-0x0000000005180000-memory.dmp

              Filesize

              64KB

            • memory/3640-248-0x0000000006B40000-0x0000000006B90000-memory.dmp

              Filesize

              320KB

            • memory/3640-247-0x0000000006AA0000-0x0000000006AAA000-memory.dmp

              Filesize

              40KB

            • memory/3640-245-0x0000000006890000-0x0000000006922000-memory.dmp

              Filesize

              584KB

            • memory/3640-243-0x0000000005170000-0x0000000005180000-memory.dmp

              Filesize

              64KB

            • memory/3640-249-0x0000000006D60000-0x0000000006F22000-memory.dmp

              Filesize

              1.8MB

            • memory/3640-238-0x0000000000400000-0x0000000000430000-memory.dmp

              Filesize

              192KB

            • memory/3640-242-0x0000000005540000-0x0000000005AE4000-memory.dmp

              Filesize

              5.6MB

            • memory/4028-220-0x0000000005240000-0x0000000005250000-memory.dmp

              Filesize

              64KB

            • memory/4028-233-0x0000000005240000-0x0000000005250000-memory.dmp

              Filesize

              64KB

            • memory/4028-221-0x0000000005240000-0x0000000005250000-memory.dmp

              Filesize

              64KB

            • memory/4676-195-0x00000000010D0000-0x00000000010DC000-memory.dmp

              Filesize

              48KB

            • memory/4676-191-0x00000000010D0000-0x00000000010DC000-memory.dmp

              Filesize

              48KB

            • memory/4960-182-0x00000000008D0000-0x000000000093B000-memory.dmp

              Filesize

              428KB

            • memory/4960-186-0x0000000000940000-0x00000000009C0000-memory.dmp

              Filesize

              512KB

            • memory/4960-187-0x00000000008D0000-0x000000000093B000-memory.dmp

              Filesize

              428KB

            • memory/4960-205-0x00000000008D0000-0x000000000093B000-memory.dmp

              Filesize

              428KB

            • memory/5056-135-0x0000000006600000-0x0000000006622000-memory.dmp

              Filesize

              136KB

            • memory/5056-134-0x0000000005400000-0x0000000005410000-memory.dmp

              Filesize

              64KB

            • memory/5056-155-0x0000000005400000-0x0000000005410000-memory.dmp

              Filesize

              64KB

            • memory/5056-133-0x00000000007E0000-0x00000000007EC000-memory.dmp

              Filesize

              48KB