Analysis

  • max time kernel
    153s
  • max time network
    156s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    13-08-2021 15:57

General

  • Target

    17c0023d45e798a2aca1661f490bf3b1.exe

  • Size

    179KB

  • MD5

    17c0023d45e798a2aca1661f490bf3b1

  • SHA1

    d4abe4adadcb1dd91985766f30dd40d19bf8b78b

  • SHA256

    6fa32e2ad0bfe2929dcc21d5c49a5db8ce834aa690cb8c5fcba33854b0bb0024

  • SHA512

    14d4643d1cb508c6491753f297743edb23ab5069167567415578a16ff8438ce99085c01eaed61cece3700e8fccb03e5e58837af0abbe59bf67ff8d0cb4ad13bd

Malware Config

Extracted

Family

smokeloader

Version

2020

C2

http://readinglistforjuly1.xyz/

http://readinglistforjuly2.xyz/

http://readinglistforjuly3.xyz/

http://readinglistforjuly4.xyz/

http://readinglistforjuly5.xyz/

http://readinglistforjuly6.xyz/

http://readinglistforjuly7.xyz/

http://readinglistforjuly8.xyz/

http://readinglistforjuly9.xyz/

http://readinglistforjuly10.xyz/

http://readinglistforjuly1.site/

http://readinglistforjuly2.site/

http://readinglistforjuly3.site/

http://readinglistforjuly4.site/

http://readinglistforjuly5.site/

http://readinglistforjuly6.site/

http://readinglistforjuly7.site/

http://readinglistforjuly8.site/

http://readinglistforjuly9.site/

http://readinglistforjuly10.site/

rc4.i32
rc4.i32

Extracted

Family

vidar

Version

40

Botnet

936

C2

https://lenak513.tumblr.com/

Attributes
  • profile_id

    936

Signatures

  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)

    suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)

  • suricata: ET MALWARE Vidar/Arkei Stealer Client Data Upload

    suricata: ET MALWARE Vidar/Arkei Stealer Client Data Upload

  • Vidar Stealer 3 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 3 IoCs
  • Deletes itself 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses 2FA software files, possible credential harvesting 2 TTPs
  • 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.

  • 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 SCSI registry key(s) 3 TTPs 3 IoCs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Kills process with taskkill 1 IoCs
  • Modifies registry class 2 IoCs
  • Modifies system certificate store 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 19 IoCs
  • Suspicious use of AdjustPrivilegeToken 12 IoCs
  • Suspicious use of UnmapMainImage 1 IoCs
  • Suspicious use of WriteProcessMemory 61 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\17c0023d45e798a2aca1661f490bf3b1.exe
    "C:\Users\Admin\AppData\Local\Temp\17c0023d45e798a2aca1661f490bf3b1.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3260
    • C:\Users\Admin\AppData\Local\Temp\17c0023d45e798a2aca1661f490bf3b1.exe
      "C:\Users\Admin\AppData\Local\Temp\17c0023d45e798a2aca1661f490bf3b1.exe"
      2⤵
      • Checks SCSI registry key(s)
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      PID:2080
  • C:\Users\Admin\AppData\Local\Temp\E489.exe
    C:\Users\Admin\AppData\Local\Temp\E489.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:196
    • C:\Users\Admin\AppData\Local\Temp\E489.exe
      "C:\Users\Admin\AppData\Local\Temp\E489.exe"
      2⤵
      • Executes dropped EXE
      PID:2416
    • C:\Users\Admin\AppData\Local\Temp\E489.exe
      "C:\Users\Admin\AppData\Local\Temp\E489.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Checks processor information in registry
      • Modifies system certificate store
      • Suspicious use of WriteProcessMemory
      PID:2272
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c taskkill /im E489.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\E489.exe" & del C:\ProgramData\*.dll & exit
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3968
        • C:\Windows\SysWOW64\taskkill.exe
          taskkill /im E489.exe /f
          4⤵
          • Kills process with taskkill
          • Suspicious use of AdjustPrivilegeToken
          PID:2628
        • C:\Windows\SysWOW64\timeout.exe
          timeout /t 6
          4⤵
          • Delays execution with timeout.exe
          PID:2772
  • C:\Windows\SysWOW64\explorer.exe
    C:\Windows\SysWOW64\explorer.exe
    1⤵
      PID:2268
    • C:\Windows\explorer.exe
      C:\Windows\explorer.exe
      1⤵
        PID:3540
      • C:\Windows\SysWOW64\explorer.exe
        C:\Windows\SysWOW64\explorer.exe
        1⤵
          PID:3716
        • C:\Windows\explorer.exe
          C:\Windows\explorer.exe
          1⤵
            PID:3356
          • C:\Windows\SysWOW64\explorer.exe
            C:\Windows\SysWOW64\explorer.exe
            1⤵
              PID:1300
            • C:\Windows\explorer.exe
              C:\Windows\explorer.exe
              1⤵
                PID:576
              • C:\Windows\SysWOW64\explorer.exe
                C:\Windows\SysWOW64\explorer.exe
                1⤵
                  PID:3916
                • C:\Windows\explorer.exe
                  C:\Windows\explorer.exe
                  1⤵
                    PID:1248
                  • C:\Windows\SysWOW64\explorer.exe
                    C:\Windows\SysWOW64\explorer.exe
                    1⤵
                      PID:1700

                    Network

                    MITRE ATT&CK Matrix ATT&CK v6

                    Defense Evasion

                    Install Root Certificate

                    1
                    T1130

                    Modify Registry

                    1
                    T1112

                    Credential Access

                    Credentials in Files

                    3
                    T1081

                    Discovery

                    Query Registry

                    3
                    T1012

                    System Information Discovery

                    3
                    T1082

                    Peripheral Device Discovery

                    1
                    T1120

                    Collection

                    Data from Local System

                    3
                    T1005

                    Replay Monitor

                    Loading Replay Monitor...

                    Downloads

                    • C:\ProgramData\freebl3.dll
                      MD5

                      ef2834ac4ee7d6724f255beaf527e635

                      SHA1

                      5be8c1e73a21b49f353c2ecfa4108e43a883cb7b

                      SHA256

                      a770ecba3b08bbabd0a567fc978e50615f8b346709f8eb3cfacf3faab24090ba

                      SHA512

                      c6ea0e4347cbd7ef5e80ae8c0afdca20ea23ac2bdd963361dfaf562a9aed58dcbc43f89dd826692a064d76c3f4b3e92361af7b79a6d16a75d9951591ae3544d2

                    • C:\ProgramData\mozglue.dll
                      MD5

                      8f73c08a9660691143661bf7332c3c27

                      SHA1

                      37fa65dd737c50fda710fdbde89e51374d0c204a

                      SHA256

                      3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

                      SHA512

                      0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

                    • C:\ProgramData\msvcp140.dll
                      MD5

                      109f0f02fd37c84bfc7508d4227d7ed5

                      SHA1

                      ef7420141bb15ac334d3964082361a460bfdb975

                      SHA256

                      334e69ac9367f708ce601a6f490ff227d6c20636da5222f148b25831d22e13d4

                      SHA512

                      46eb62b65817365c249b48863d894b4669e20fcb3992e747cd5c9fdd57968e1b2cf7418d1c9340a89865eadda362b8db51947eb4427412eb83b35994f932fd39

                    • C:\ProgramData\nss3.dll
                      MD5

                      bfac4e3c5908856ba17d41edcd455a51

                      SHA1

                      8eec7e888767aa9e4cca8ff246eb2aacb9170428

                      SHA256

                      e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

                      SHA512

                      2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

                    • C:\ProgramData\softokn3.dll
                      MD5

                      a2ee53de9167bf0d6c019303b7ca84e5

                      SHA1

                      2a3c737fa1157e8483815e98b666408a18c0db42

                      SHA256

                      43536adef2ddcc811c28d35fa6ce3031029a2424ad393989db36169ff2995083

                      SHA512

                      45b56432244f86321fa88fbcca6a0d2a2f7f4e0648c1d7d7b1866adc9daa5eddd9f6bb73662149f279c9ab60930dad1113c8337cb5e6ec9eed5048322f65f7d8

                    • C:\ProgramData\vcruntime140.dll
                      MD5

                      7587bf9cb4147022cd5681b015183046

                      SHA1

                      f2106306a8f6f0da5afb7fc765cfa0757ad5a628

                      SHA256

                      c40bb03199a2054dabfc7a8e01d6098e91de7193619effbd0f142a7bf031c14d

                      SHA512

                      0b63e4979846ceba1b1ed8470432ea6aa18cca66b5f5322d17b14bc0dfa4b2ee09ca300a016e16a01db5123e4e022820698f46d9bad1078bd24675b4b181e91f

                    • C:\Users\Admin\AppData\Local\Temp\E489.exe
                      MD5

                      42c33b9a16b4942491702076b3688598

                      SHA1

                      fd931689d541d3b82ce38622ef60cff25f2eea3f

                      SHA256

                      22cfe61a2ee0f1f0cba957fb313ca979e7fc41a2f9a1b5dddf8d9af798113389

                      SHA512

                      cd0cfc3a68ff9e84d71b776f187b906bd10e4eb89190ee5b2587ff3ac340b4a5c9516966339c064141b064b9bcd3e354aeb2ec7c6cba424affd5cd886bacb366

                    • C:\Users\Admin\AppData\Local\Temp\E489.exe
                      MD5

                      42c33b9a16b4942491702076b3688598

                      SHA1

                      fd931689d541d3b82ce38622ef60cff25f2eea3f

                      SHA256

                      22cfe61a2ee0f1f0cba957fb313ca979e7fc41a2f9a1b5dddf8d9af798113389

                      SHA512

                      cd0cfc3a68ff9e84d71b776f187b906bd10e4eb89190ee5b2587ff3ac340b4a5c9516966339c064141b064b9bcd3e354aeb2ec7c6cba424affd5cd886bacb366

                    • C:\Users\Admin\AppData\Local\Temp\E489.exe
                      MD5

                      42c33b9a16b4942491702076b3688598

                      SHA1

                      fd931689d541d3b82ce38622ef60cff25f2eea3f

                      SHA256

                      22cfe61a2ee0f1f0cba957fb313ca979e7fc41a2f9a1b5dddf8d9af798113389

                      SHA512

                      cd0cfc3a68ff9e84d71b776f187b906bd10e4eb89190ee5b2587ff3ac340b4a5c9516966339c064141b064b9bcd3e354aeb2ec7c6cba424affd5cd886bacb366

                    • C:\Users\Admin\AppData\Local\Temp\E489.exe
                      MD5

                      42c33b9a16b4942491702076b3688598

                      SHA1

                      fd931689d541d3b82ce38622ef60cff25f2eea3f

                      SHA256

                      22cfe61a2ee0f1f0cba957fb313ca979e7fc41a2f9a1b5dddf8d9af798113389

                      SHA512

                      cd0cfc3a68ff9e84d71b776f187b906bd10e4eb89190ee5b2587ff3ac340b4a5c9516966339c064141b064b9bcd3e354aeb2ec7c6cba424affd5cd886bacb366

                    • \ProgramData\mozglue.dll
                      MD5

                      8f73c08a9660691143661bf7332c3c27

                      SHA1

                      37fa65dd737c50fda710fdbde89e51374d0c204a

                      SHA256

                      3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

                      SHA512

                      0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

                    • \ProgramData\nss3.dll
                      MD5

                      bfac4e3c5908856ba17d41edcd455a51

                      SHA1

                      8eec7e888767aa9e4cca8ff246eb2aacb9170428

                      SHA256

                      e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

                      SHA512

                      2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

                    • memory/196-141-0x00000000051B0000-0x000000000524C000-memory.dmp
                      Filesize

                      624KB

                    • memory/196-123-0x00000000008E0000-0x00000000008E1000-memory.dmp
                      Filesize

                      4KB

                    • memory/196-129-0x00000000052E0000-0x00000000052E1000-memory.dmp
                      Filesize

                      4KB

                    • memory/196-130-0x0000000005880000-0x0000000005881000-memory.dmp
                      Filesize

                      4KB

                    • memory/196-158-0x000000000B260000-0x000000000B2FD000-memory.dmp
                      Filesize

                      628KB

                    • memory/196-157-0x0000000008E30000-0x0000000008F1F000-memory.dmp
                      Filesize

                      956KB

                    • memory/196-147-0x00000000089B0000-0x00000000089C8000-memory.dmp
                      Filesize

                      96KB

                    • memory/196-134-0x0000000005380000-0x0000000005381000-memory.dmp
                      Filesize

                      4KB

                    • memory/196-118-0x0000000000000000-mapping.dmp
                    • memory/196-143-0x0000000005580000-0x0000000005581000-memory.dmp
                      Filesize

                      4KB

                    • memory/196-142-0x0000000005280000-0x0000000005281000-memory.dmp
                      Filesize

                      4KB

                    • memory/576-145-0x0000000000E10000-0x0000000000E16000-memory.dmp
                      Filesize

                      24KB

                    • memory/576-144-0x0000000000000000-mapping.dmp
                    • memory/576-146-0x0000000000E00000-0x0000000000E0C000-memory.dmp
                      Filesize

                      48KB

                    • memory/1248-152-0x0000000000BF0000-0x0000000000BF5000-memory.dmp
                      Filesize

                      20KB

                    • memory/1248-153-0x0000000000BE0000-0x0000000000BE9000-memory.dmp
                      Filesize

                      36KB

                    • memory/1248-151-0x0000000000000000-mapping.dmp
                    • memory/1300-140-0x00000000006A0000-0x00000000006A9000-memory.dmp
                      Filesize

                      36KB

                    • memory/1300-139-0x00000000006B0000-0x00000000006B5000-memory.dmp
                      Filesize

                      20KB

                    • memory/1300-138-0x0000000000000000-mapping.dmp
                    • memory/1700-156-0x0000000000560000-0x0000000000569000-memory.dmp
                      Filesize

                      36KB

                    • memory/1700-155-0x0000000000570000-0x0000000000575000-memory.dmp
                      Filesize

                      20KB

                    • memory/1700-154-0x0000000000000000-mapping.dmp
                    • memory/2080-115-0x0000000000400000-0x0000000000409000-memory.dmp
                      Filesize

                      36KB

                    • memory/2080-116-0x0000000000402E1A-mapping.dmp
                    • memory/2268-128-0x0000000000540000-0x00000000005AB000-memory.dmp
                      Filesize

                      428KB

                    • memory/2268-125-0x0000000000800000-0x0000000000874000-memory.dmp
                      Filesize

                      464KB

                    • memory/2268-121-0x0000000000000000-mapping.dmp
                    • memory/2272-163-0x0000000000400000-0x00000000004A1000-memory.dmp
                      Filesize

                      644KB

                    • memory/2272-160-0x0000000000400000-0x00000000004A1000-memory.dmp
                      Filesize

                      644KB

                    • memory/2272-161-0x000000000046B77D-mapping.dmp
                    • memory/2628-167-0x0000000000000000-mapping.dmp
                    • memory/2772-168-0x0000000000000000-mapping.dmp
                    • memory/3016-117-0x00000000012D0000-0x00000000012E6000-memory.dmp
                      Filesize

                      88KB

                    • memory/3260-114-0x0000000002C70000-0x0000000002DBA000-memory.dmp
                      Filesize

                      1.3MB

                    • memory/3356-136-0x0000000000510000-0x0000000000519000-memory.dmp
                      Filesize

                      36KB

                    • memory/3356-135-0x0000000000000000-mapping.dmp
                    • memory/3356-137-0x0000000000500000-0x000000000050F000-memory.dmp
                      Filesize

                      60KB

                    • memory/3540-127-0x0000000000DE0000-0x0000000000DEC000-memory.dmp
                      Filesize

                      48KB

                    • memory/3540-126-0x0000000000DF0000-0x0000000000DF7000-memory.dmp
                      Filesize

                      28KB

                    • memory/3540-122-0x0000000000000000-mapping.dmp
                    • memory/3716-132-0x0000000000F90000-0x0000000000F97000-memory.dmp
                      Filesize

                      28KB

                    • memory/3716-131-0x0000000000000000-mapping.dmp
                    • memory/3716-133-0x0000000000F80000-0x0000000000F8B000-memory.dmp
                      Filesize

                      44KB

                    • memory/3916-148-0x0000000000000000-mapping.dmp
                    • memory/3916-149-0x0000000000E20000-0x0000000000E24000-memory.dmp
                      Filesize

                      16KB

                    • memory/3916-150-0x0000000000E10000-0x0000000000E19000-memory.dmp
                      Filesize

                      36KB

                    • memory/3968-166-0x0000000000000000-mapping.dmp