Analysis

  • max time kernel
    146s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    27-03-2023 01:39

General

  • Target

    9b8b81e1185334bcf1d2c4a865e631c4b67ecca8d2795a6174cfa8cad721c737.exe

  • Size

    273KB

  • MD5

    6cc6e0f96c9436d423167dbeb71da2a7

  • SHA1

    074ffa92fb78dc09b4674e45fad70ce2082eeea3

  • SHA256

    9b8b81e1185334bcf1d2c4a865e631c4b67ecca8d2795a6174cfa8cad721c737

  • SHA512

    f6e97bf800a0436d27a7d059ddb8c6a49828957a3dd39d6ef9ce6c85a3fdab99d8bb035d0ae911f58512fd19c0a2caa4de905286e14529c57f8ff246c43aa0ac

  • SSDEEP

    3072:Ca+zzQ2vCRxuUxAIvKLpnmlKWAkcVgHZLYUlEC2UoXsAEsrTZAbW8dLJf/+yCJQO:moxueinmlF0UlhoXsjoZsW8ddETfz

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). Likely ransomware behaviour.

  • 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\9b8b81e1185334bcf1d2c4a865e631c4b67ecca8d2795a6174cfa8cad721c737.exe
    "C:\Users\Admin\AppData\Local\Temp\9b8b81e1185334bcf1d2c4a865e631c4b67ecca8d2795a6174cfa8cad721c737.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2012
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ckizemcz\
      2⤵
        PID:1980
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bzjkmilr.exe" C:\Windows\SysWOW64\ckizemcz\
        2⤵
          PID:1860
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ckizemcz binPath= "C:\Windows\SysWOW64\ckizemcz\bzjkmilr.exe /d\"C:\Users\Admin\AppData\Local\Temp\9b8b81e1185334bcf1d2c4a865e631c4b67ecca8d2795a6174cfa8cad721c737.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1324
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ckizemcz "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:964
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ckizemcz
          2⤵
          • Launches sc.exe
          PID:1184
        • 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:1240
      • C:\Windows\SysWOW64\ckizemcz\bzjkmilr.exe
        C:\Windows\SysWOW64\ckizemcz\bzjkmilr.exe /d"C:\Users\Admin\AppData\Local\Temp\9b8b81e1185334bcf1d2c4a865e631c4b67ecca8d2795a6174cfa8cad721c737.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1936
        • 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:1924
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.60000 -p x -k -a cn/half
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:300

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

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

        Filesize

        13.6MB

        MD5

        6f5b131c94c8ef00207c989084e45170

        SHA1

        505eeb5a4f8351ad64f1c935f9293f924e4bd2b5

        SHA256

        1c076f5315eeb12f94a372b5f6792271897117a66fcc9f9473c17c6778900aa4

        SHA512

        554780e7a4bca324485c490f21901b64be83b723176cff084736986994e67f211b679b0cd10fad05cd74632a8a38703d780e8d179e6d85fdc6f6b4843dc0f4e7

      • C:\Windows\SysWOW64\ckizemcz\bzjkmilr.exe

        Filesize

        13.6MB

        MD5

        6f5b131c94c8ef00207c989084e45170

        SHA1

        505eeb5a4f8351ad64f1c935f9293f924e4bd2b5

        SHA256

        1c076f5315eeb12f94a372b5f6792271897117a66fcc9f9473c17c6778900aa4

        SHA512

        554780e7a4bca324485c490f21901b64be83b723176cff084736986994e67f211b679b0cd10fad05cd74632a8a38703d780e8d179e6d85fdc6f6b4843dc0f4e7

      • memory/300-111-0x0000000000100000-0x00000000001F1000-memory.dmp

        Filesize

        964KB

      • memory/300-124-0x0000000000100000-0x00000000001F1000-memory.dmp

        Filesize

        964KB

      • memory/300-123-0x0000000000100000-0x00000000001F1000-memory.dmp

        Filesize

        964KB

      • memory/300-122-0x0000000000100000-0x00000000001F1000-memory.dmp

        Filesize

        964KB

      • memory/300-121-0x0000000000100000-0x00000000001F1000-memory.dmp

        Filesize

        964KB

      • memory/300-120-0x0000000000100000-0x00000000001F1000-memory.dmp

        Filesize

        964KB

      • memory/300-119-0x0000000000100000-0x00000000001F1000-memory.dmp

        Filesize

        964KB

      • memory/300-112-0x0000000000100000-0x00000000001F1000-memory.dmp

        Filesize

        964KB

      • memory/1924-88-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1924-92-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1924-72-0x0000000001AA0000-0x0000000001CAF000-memory.dmp

        Filesize

        2.1MB

      • memory/1924-75-0x0000000001AA0000-0x0000000001CAF000-memory.dmp

        Filesize

        2.1MB

      • memory/1924-76-0x0000000000110000-0x0000000000116000-memory.dmp

        Filesize

        24KB

      • memory/1924-79-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1924-82-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1924-83-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1924-84-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1924-85-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1924-86-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1924-87-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1924-60-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1924-89-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1924-90-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1924-91-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1924-93-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1924-71-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1924-94-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1924-95-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1924-96-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1924-97-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1924-98-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1924-99-0x00000000002A0000-0x00000000002A5000-memory.dmp

        Filesize

        20KB

      • memory/1924-102-0x00000000002A0000-0x00000000002A5000-memory.dmp

        Filesize

        20KB

      • memory/1924-103-0x00000000058D0000-0x0000000005CDB000-memory.dmp

        Filesize

        4.0MB

      • memory/1924-106-0x00000000058D0000-0x0000000005CDB000-memory.dmp

        Filesize

        4.0MB

      • memory/1924-107-0x00000000003F0000-0x00000000003F7000-memory.dmp

        Filesize

        28KB

      • memory/1924-69-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1924-68-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1924-61-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/1924-67-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1924-62-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1936-63-0x0000000000400000-0x0000000002B71000-memory.dmp

        Filesize

        39.4MB

      • memory/2012-66-0x0000000000400000-0x0000000002B71000-memory.dmp

        Filesize

        39.4MB

      • memory/2012-56-0x00000000001B0000-0x00000000001C3000-memory.dmp

        Filesize

        76KB