Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18-12-2022 01:07

General

  • Target

    528b41a1109add7cca54e64f61a5e91e304f1dfd357e4db27a7b04c350d645bc.exe

  • Size

    213KB

  • MD5

    1051fb8c6a83417c3df1e4b1c55de0ba

  • SHA1

    514d06b69d4a73a71cf93b68eb3f7b9b2edfb4af

  • SHA256

    528b41a1109add7cca54e64f61a5e91e304f1dfd357e4db27a7b04c350d645bc

  • SHA512

    2cfddbdd28809d9a04a59fca3bf3d41ca11ff806c87dad0e0f8b3eb396350b6f11da1e3dd520fe682347af6cf66362e4f8b5c4249ac25a6ec9b321d240358987

  • SSDEEP

    3072:WtDYkcVDLfqZwR5MJHt6oS6RuA1bP39DD1SH58/g3xo2koSG3ERWR3LV:wUkMDLfqbHLP33g3C4U0VB

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\528b41a1109add7cca54e64f61a5e91e304f1dfd357e4db27a7b04c350d645bc.exe
    "C:\Users\Admin\AppData\Local\Temp\528b41a1109add7cca54e64f61a5e91e304f1dfd357e4db27a7b04c350d645bc.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1584
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\pivjncpn\
      2⤵
        PID:4960
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\spjkhpfm.exe" C:\Windows\SysWOW64\pivjncpn\
        2⤵
          PID:840
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create pivjncpn binPath= "C:\Windows\SysWOW64\pivjncpn\spjkhpfm.exe /d\"C:\Users\Admin\AppData\Local\Temp\528b41a1109add7cca54e64f61a5e91e304f1dfd357e4db27a7b04c350d645bc.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4624
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description pivjncpn "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2456
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start pivjncpn
          2⤵
          • Launches sc.exe
          PID:852
        • 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 1584 -s 1044
          2⤵
          • Program crash
          PID:3260
      • C:\Windows\SysWOW64\pivjncpn\spjkhpfm.exe
        C:\Windows\SysWOW64\pivjncpn\spjkhpfm.exe /d"C:\Users\Admin\AppData\Local\Temp\528b41a1109add7cca54e64f61a5e91e304f1dfd357e4db27a7b04c350d645bc.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:204
        • 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:4112
          • 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:3712
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 204 -s 516
          2⤵
          • Program crash
          PID:3692
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 1584 -ip 1584
        1⤵
          PID:5116
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 204 -ip 204
          1⤵
            PID:4636

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            11.1MB

            MD5

            8b4d268a0bb7862f40cd5e4846e63893

            SHA1

            6c07fb73e7923a8e507e67bb9fd2aab9eef9ba14

            SHA256

            4dbf9e66dca9c6ab6f0327284647dcf6d9bd999a52ca71e1be26c730a3a3fcaf

            SHA512

            3e8e3cb1957b465f6f32fb4a9b57b8dafe50eabd3128c30723e611b0698318a7cec7fd7d008924759efab9a63014c680df709833cff59d7f686ea4662f683d57

          • C:\Windows\SysWOW64\pivjncpn\spjkhpfm.exe

            Filesize

            11.1MB

            MD5

            8b4d268a0bb7862f40cd5e4846e63893

            SHA1

            6c07fb73e7923a8e507e67bb9fd2aab9eef9ba14

            SHA256

            4dbf9e66dca9c6ab6f0327284647dcf6d9bd999a52ca71e1be26c730a3a3fcaf

            SHA512

            3e8e3cb1957b465f6f32fb4a9b57b8dafe50eabd3128c30723e611b0698318a7cec7fd7d008924759efab9a63014c680df709833cff59d7f686ea4662f683d57

          • memory/204-149-0x00000000004AE000-0x00000000004BE000-memory.dmp

            Filesize

            64KB

          • memory/204-150-0x0000000000400000-0x000000000045F000-memory.dmp

            Filesize

            380KB

          • memory/840-136-0x0000000000000000-mapping.dmp

          • memory/852-140-0x0000000000000000-mapping.dmp

          • memory/1584-143-0x0000000000522000-0x0000000000532000-memory.dmp

            Filesize

            64KB

          • memory/1584-133-0x00000000004A0000-0x00000000004B3000-memory.dmp

            Filesize

            76KB

          • memory/1584-134-0x0000000000400000-0x000000000045F000-memory.dmp

            Filesize

            380KB

          • memory/1584-132-0x0000000000522000-0x0000000000532000-memory.dmp

            Filesize

            64KB

          • memory/1584-144-0x0000000000400000-0x000000000045F000-memory.dmp

            Filesize

            380KB

          • memory/2456-139-0x0000000000000000-mapping.dmp

          • memory/3712-177-0x0000000000400000-0x00000000004F1000-memory.dmp

            Filesize

            964KB

          • memory/3712-171-0x0000000000000000-mapping.dmp

          • memory/3712-172-0x0000000000400000-0x00000000004F1000-memory.dmp

            Filesize

            964KB

          • memory/4112-146-0x00000000005D0000-0x00000000005E5000-memory.dmp

            Filesize

            84KB

          • memory/4112-145-0x0000000000000000-mapping.dmp

          • memory/4112-151-0x00000000005D0000-0x00000000005E5000-memory.dmp

            Filesize

            84KB

          • memory/4112-152-0x00000000005D0000-0x00000000005E5000-memory.dmp

            Filesize

            84KB

          • memory/4112-153-0x0000000002400000-0x000000000260F000-memory.dmp

            Filesize

            2.1MB

          • memory/4112-156-0x0000000001B40000-0x0000000001B46000-memory.dmp

            Filesize

            24KB

          • memory/4112-159-0x0000000001B50000-0x0000000001B60000-memory.dmp

            Filesize

            64KB

          • memory/4112-162-0x0000000001BE0000-0x0000000001BE5000-memory.dmp

            Filesize

            20KB

          • memory/4112-165-0x0000000007380000-0x000000000778B000-memory.dmp

            Filesize

            4.0MB

          • memory/4112-168-0x0000000001BF0000-0x0000000001BF7000-memory.dmp

            Filesize

            28KB

          • memory/4624-138-0x0000000000000000-mapping.dmp

          • memory/4960-135-0x0000000000000000-mapping.dmp

          • memory/5056-142-0x0000000000000000-mapping.dmp