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Resubmissions

24/05/2021, 05:31

210524-b4dx7j71fj 10

21/05/2021, 13:30

210521-r42mg8cghe 10

Analysis

  • max time kernel
    300s
  • max time network
    279s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    24/05/2021, 05:31

General

  • Target

    keygen-step-4.exe

  • Size

    5.6MB

  • MD5

    a110ce3f7366c6bb12553ea17a793110

  • SHA1

    8e10076496347d6324382f20968f3b7c8516eedf

  • SHA256

    0e63f296fdc309cb1e487cd1a549d029d2a9144b8a050db274901030dc6ec0f3

  • SHA512

    dc9103da71a1143365f3c7f39c4a316a9b9cc6e337b601a95d13d68bba777d2145d79a9d44ac96edce71775819e4d4bb2bb0cf7e49627163237ec3580b25c3cf

Malware Config

Extracted

Family

redline

Botnet

ServLyla2

C2

87.251.71.4:80

Signatures

  • PlugX

    PlugX is a RAT (Remote Access Trojan) that has been around since 2008.

  • RedLine

    RedLine Stealer is a malware family written in C#, first appearing in early 2020.

  • RedLine Payload 2 IoCs
  • Executes dropped EXE 6 IoCs
  • UPX packed file 4 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • VMProtect packed file 3 IoCs

    Detects executables packed with VMProtect commercial packer.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Looks up external IP address via web service 3 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in System32 directory 1 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies data under HKEY_USERS 15 IoCs
  • Modifies registry class 14 IoCs
  • Suspicious behavior: EnumeratesProcesses 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 57 IoCs

Processes

  • c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k netsvcs -s gpsvc
    1⤵
      PID:296
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
      1⤵
        PID:2340
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
        1⤵
          PID:2364
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s WpnService
          1⤵
            PID:2688
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
            1⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:2676
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s Browser
            1⤵
              PID:2560
            • c:\windows\system32\svchost.exe
              c:\windows\system32\svchost.exe -k netsvcs -s ShellHWDetection
              1⤵
                PID:1916
              • c:\windows\system32\svchost.exe
                c:\windows\system32\svchost.exe -k netsvcs -s SENS
                1⤵
                  PID:1448
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s Themes
                  1⤵
                    PID:1304
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s UserManager
                    1⤵
                      PID:1228
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s ProfSvc
                      1⤵
                        PID:1108
                      • c:\windows\system32\svchost.exe
                        c:\windows\system32\svchost.exe -k netsvcs -s Schedule
                        1⤵
                        • Modifies registry class
                        PID:908
                      • C:\Users\Admin\AppData\Local\Temp\keygen-step-4.exe
                        "C:\Users\Admin\AppData\Local\Temp\keygen-step-4.exe"
                        1⤵
                        • Suspicious use of WriteProcessMemory
                        PID:512
                        • C:\Users\Admin\AppData\Local\Temp\RarSFX0\Crack.exe
                          "C:\Users\Admin\AppData\Local\Temp\RarSFX0\Crack.exe"
                          2⤵
                          • Executes dropped EXE
                          • Checks computer location settings
                          • Modifies registry class
                          • Suspicious use of WriteProcessMemory
                          PID:1772
                          • C:\Windows\SysWOW64\rUNdlL32.eXe
                            "C:\Windows\system32\rUNdlL32.eXe" "C:\Users\Admin\AppData\Local\Temp\install.dll",setuser
                            3⤵
                            • Loads dropped DLL
                            • Modifies registry class
                            • Suspicious behavior: EnumeratesProcesses
                            • Suspicious use of AdjustPrivilegeToken
                            • Suspicious use of WriteProcessMemory
                            PID:2412
                        • C:\Users\Admin\AppData\Local\Temp\RarSFX0\ABCbrow.exe
                          "C:\Users\Admin\AppData\Local\Temp\RarSFX0\ABCbrow.exe"
                          2⤵
                          • Executes dropped EXE
                          • Suspicious use of SetThreadContext
                          • Suspicious use of AdjustPrivilegeToken
                          • Suspicious use of WriteProcessMemory
                          PID:3572
                          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
                            C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
                            3⤵
                            • Suspicious behavior: EnumeratesProcesses
                            • Suspicious use of AdjustPrivilegeToken
                            PID:4180
                        • C:\Users\Admin\AppData\Local\Temp\RarSFX0\jg6_6asg.exe
                          "C:\Users\Admin\AppData\Local\Temp\RarSFX0\jg6_6asg.exe"
                          2⤵
                          • Executes dropped EXE
                          • Checks whether UAC is enabled
                          • Suspicious use of AdjustPrivilegeToken
                          PID:4232
                        • C:\Users\Admin\AppData\Local\Temp\RarSFX0\gaoou.exe
                          "C:\Users\Admin\AppData\Local\Temp\RarSFX0\gaoou.exe"
                          2⤵
                          • Executes dropped EXE
                          • Adds Run key to start application
                          • Suspicious use of WriteProcessMemory
                          PID:4896
                          • C:\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe
                            C:\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe /scookiestxt C:\Users\Admin\AppData\Local\Temp\fj4ghga23_fsa.txt
                            3⤵
                            • Executes dropped EXE
                            PID:4956
                          • C:\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe
                            C:\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe /scookiestxt C:\Users\Admin\AppData\Local\Temp\fj4ghga23_fsa.txt
                            3⤵
                            • Executes dropped EXE
                            • Suspicious behavior: EnumeratesProcesses
                            PID:892
                      • \??\c:\windows\system32\svchost.exe
                        c:\windows\system32\svchost.exe -k netsvcs -s BITS
                        1⤵
                        • Suspicious use of SetThreadContext
                        • Modifies data under HKEY_USERS
                        • Modifies registry class
                        • Suspicious behavior: EnumeratesProcesses
                        • Suspicious use of AdjustPrivilegeToken
                        • Suspicious use of WriteProcessMemory
                        PID:688
                        • C:\Windows\system32\svchost.exe
                          C:\Windows\system32\svchost.exe -k SystemNetworkService
                          2⤵
                          • Drops file in System32 directory
                          • Checks processor information in registry
                          • Modifies data under HKEY_USERS
                          • Modifies registry class
                          • Suspicious use of WriteProcessMemory
                          PID:3840

                      Network

                      MITRE ATT&CK Enterprise v6

                      Replay Monitor

                      Loading Replay Monitor...

                      Downloads

                      • memory/296-137-0x0000018543AA0000-0x0000018543AEB000-memory.dmp

                        Filesize

                        300KB

                      • memory/296-140-0x0000018543B80000-0x0000018543BF0000-memory.dmp

                        Filesize

                        448KB

                      • memory/296-241-0x0000018543D70000-0x0000018543DE0000-memory.dmp

                        Filesize

                        448KB

                      • memory/688-146-0x0000021934460000-0x00000219344D0000-memory.dmp

                        Filesize

                        448KB

                      • memory/908-179-0x0000013449430000-0x00000134494A0000-memory.dmp

                        Filesize

                        448KB

                      • memory/908-249-0x00000134499A0000-0x0000013449A10000-memory.dmp

                        Filesize

                        448KB

                      • memory/1108-247-0x000001F89D9B0000-0x000001F89DA20000-memory.dmp

                        Filesize

                        448KB

                      • memory/1108-160-0x000001F89D460000-0x000001F89D4D0000-memory.dmp

                        Filesize

                        448KB

                      • memory/1228-192-0x000001E665A70000-0x000001E665AE0000-memory.dmp

                        Filesize

                        448KB

                      • memory/1228-257-0x000001E6664B0000-0x000001E666520000-memory.dmp

                        Filesize

                        448KB

                      • memory/1304-255-0x000002601B420000-0x000002601B490000-memory.dmp

                        Filesize

                        448KB

                      • memory/1304-190-0x000002601B340000-0x000002601B3B0000-memory.dmp

                        Filesize

                        448KB

                      • memory/1448-183-0x0000019C98640000-0x0000019C986B0000-memory.dmp

                        Filesize

                        448KB

                      • memory/1448-251-0x0000019C986B0000-0x0000019C98720000-memory.dmp

                        Filesize

                        448KB

                      • memory/1916-188-0x000001C5D8B40000-0x000001C5D8BB0000-memory.dmp

                        Filesize

                        448KB

                      • memory/1916-253-0x000001C5D8C20000-0x000001C5D8C90000-memory.dmp

                        Filesize

                        448KB

                      • memory/2340-245-0x000001E4A9CB0000-0x000001E4A9D20000-memory.dmp

                        Filesize

                        448KB

                      • memory/2340-153-0x000001E4A9780000-0x000001E4A97F0000-memory.dmp

                        Filesize

                        448KB

                      • memory/2364-243-0x000001F4EF700000-0x000001F4EF770000-memory.dmp

                        Filesize

                        448KB

                      • memory/2364-147-0x000001F4EF620000-0x000001F4EF690000-memory.dmp

                        Filesize

                        448KB

                      • memory/2412-134-0x0000000004662000-0x0000000004763000-memory.dmp

                        Filesize

                        1.0MB

                      • memory/2412-139-0x0000000000FA0000-0x0000000000FFC000-memory.dmp

                        Filesize

                        368KB

                      • memory/2560-239-0x000001D534640000-0x000001D5346B0000-memory.dmp

                        Filesize

                        448KB

                      • memory/2560-154-0x000001D534060000-0x000001D5340D0000-memory.dmp

                        Filesize

                        448KB

                      • memory/2676-259-0x00000252D3830000-0x00000252D38A0000-memory.dmp

                        Filesize

                        448KB

                      • memory/2676-194-0x00000252D2F60000-0x00000252D2FD0000-memory.dmp

                        Filesize

                        448KB

                      • memory/2688-261-0x0000016FE1C40000-0x0000016FE1CB0000-memory.dmp

                        Filesize

                        448KB

                      • memory/2688-196-0x0000016FE1780000-0x0000016FE17F0000-memory.dmp

                        Filesize

                        448KB

                      • memory/3572-142-0x00000000056B0000-0x00000000056B9000-memory.dmp

                        Filesize

                        36KB

                      • memory/3572-131-0x0000000000F40000-0x0000000000F41000-memory.dmp

                        Filesize

                        4KB

                      • memory/3572-157-0x0000000005820000-0x0000000005821000-memory.dmp

                        Filesize

                        4KB

                      • memory/3840-159-0x00000208C7500000-0x00000208C7570000-memory.dmp

                        Filesize

                        448KB

                      • memory/3840-226-0x00000208C75D0000-0x00000208C75EB000-memory.dmp

                        Filesize

                        108KB

                      • memory/3840-225-0x00000208C9C00000-0x00000208C9D06000-memory.dmp

                        Filesize

                        1.0MB

                      • memory/4180-200-0x0000000005280000-0x0000000005281000-memory.dmp

                        Filesize

                        4KB

                      • memory/4180-199-0x0000000005240000-0x0000000005241000-memory.dmp

                        Filesize

                        4KB

                      • memory/4180-197-0x00000000051E0000-0x00000000051E1000-memory.dmp

                        Filesize

                        4KB

                      • memory/4180-175-0x0000000000400000-0x000000000041C000-memory.dmp

                        Filesize

                        112KB

                      • memory/4180-185-0x0000000005730000-0x0000000005731000-memory.dmp

                        Filesize

                        4KB

                      • memory/4180-201-0x0000000005120000-0x0000000005726000-memory.dmp

                        Filesize

                        6.0MB

                      • memory/4180-214-0x00000000054F0000-0x00000000054F1000-memory.dmp

                        Filesize

                        4KB

                      • memory/4232-198-0x0000000000400000-0x00000000005DB000-memory.dmp

                        Filesize

                        1.9MB

                      • memory/4232-208-0x0000000003920000-0x0000000003930000-memory.dmp

                        Filesize

                        64KB

                      • memory/4232-202-0x0000000003780000-0x0000000003790000-memory.dmp

                        Filesize

                        64KB