Analysis

  • max time kernel
    124s
  • max time network
    127s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    30-03-2021 05:41

General

  • Target

    fda422a54b108ec592b499e0dc59e6c6.exe

  • Size

    704KB

  • MD5

    fda422a54b108ec592b499e0dc59e6c6

  • SHA1

    8ee655935d7620a6d2f18f26d0532f9dfa8b56e8

  • SHA256

    0e55e17532909ad5ad34eb4e35d791b27c6951dd15a8baba34c29ae572c884d0

  • SHA512

    11a8e56836af1b1b86dbea68fc570535d2f74266fecda6fa9e6f90431d9596740632a35fa0ca86d8b9f58706425f3ecda2dc572f3c47bf7e2323c02f43ead52e

Malware Config

Signatures

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Modifies file permissions 1 TTPs 1 IoCs
  • Reads local data of messenger clients 2 TTPs

    Infostealers often target stored data of messaging applications, which can include saved credentials and account information.

  • 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
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks installed software on the system 1 TTPs

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

  • Looks up external IP address via web service 3 IoCs

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

  • 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.

  • Delays execution with timeout.exe 2 IoCs
  • Kills process with taskkill 1 IoCs
  • Modifies system certificate store 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 27 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\fda422a54b108ec592b499e0dc59e6c6.exe
    "C:\Users\Admin\AppData\Local\Temp\fda422a54b108ec592b499e0dc59e6c6.exe"
    1⤵
    • Adds Run key to start application
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4040
    • C:\Windows\SysWOW64\icacls.exe
      icacls "C:\Users\Admin\AppData\Local\a9773302-c76d-41ac-9415-e41388c41e40" /deny *S-1-1-0:(OI)(CI)(DE,DC)
      2⤵
      • Modifies file permissions
      PID:1232
    • C:\Users\Admin\AppData\Local\Temp\fda422a54b108ec592b499e0dc59e6c6.exe
      "C:\Users\Admin\AppData\Local\Temp\fda422a54b108ec592b499e0dc59e6c6.exe" --Admin IsNotAutoStart IsNotTask
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3060
      • C:\Users\Admin\AppData\Local\f09a83d7-e522-463d-86a4-2924f39ef0db\updatewin.exe
        "C:\Users\Admin\AppData\Local\f09a83d7-e522-463d-86a4-2924f39ef0db\updatewin.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:2072
        • C:\Windows\SysWOW64\cmd.exe
          /c timeout /t 3 & del /f /q C:\Users\Admin\AppData\Local\f09a83d7-e522-463d-86a4-2924f39ef0db\updatewin.exe
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:732
          • C:\Windows\SysWOW64\timeout.exe
            timeout /t 3
            5⤵
            • Delays execution with timeout.exe
            PID:3896
      • C:\Users\Admin\AppData\Local\f09a83d7-e522-463d-86a4-2924f39ef0db\5.exe
        "C:\Users\Admin\AppData\Local\f09a83d7-e522-463d-86a4-2924f39ef0db\5.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Checks processor information in registry
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:3880
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im 5.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\f09a83d7-e522-463d-86a4-2924f39ef0db\5.exe" & del C:\ProgramData\*.dll & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:2484
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im 5.exe /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:2488
          • C:\Windows\SysWOW64\timeout.exe
            timeout /t 6
            5⤵
            • Delays execution with timeout.exe
            PID:764

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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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\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D

    MD5

    54e60fd0149fe960a1bb51d1a63724b3

    SHA1

    8edc3d0d641441a72c642c3e96dabfe8aa9877a8

    SHA256

    7cdb049d052b55ee9c2ba9096e8cf7e1f9117d2898c1679ab2ef2e8683356309

    SHA512

    090766a3ae2e7d091ee0f22ce954373327d9642e10451f55342b76b1aa444c8e16cc4102957570e08d7fa19b1e17fe34f8a764f8c041c82f799d095ccf0f357b

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E

    MD5

    3be96afd7b9e0ff481b665d594167224

    SHA1

    aff8ca9cc93425b2c20b55aaf1c1e0b56f347144

    SHA256

    36981629cd13aef6fa93a598db9dd7745d491fb7bee57b235ddcb66f1a8c5799

    SHA512

    76df4e5a44f6be6e75136550ebdc4bad504cafeef08c2a3f3730343f43b22771b8a3f9ba6ea5b755ed4e674257754bf29b2b8197f9bc0894219dde5f34821299

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D

    MD5

    126e4daef555646b6d55cef384989930

    SHA1

    8b6db0a77a3af6b0f0adf953f42391dd00201d08

    SHA256

    0c1077b508ca7d96e41ff9c5c419f9c236d46fd2b17760dd553b3291e5019e6a

    SHA512

    fc666b3f86789e3af69226945cd99b47a0583c3c52e94ed57ca46cbf9a327b50a49ca807ec8da4550f87f2c8e18a49a536de0d02b9515c57dc21f0a8ee651b38

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E

    MD5

    cc6af27281e9270942c00dc8e219f468

    SHA1

    15e44a7eca994bd0b0d7d2d51f56ef5334fc8dc2

    SHA256

    12cbdda4250b8d27190c9b766826b0b3e3e88644621ec8c7f5f9b0b821b75282

    SHA512

    6f05a9ed43df0caa4bf50c92aa13b83cb9c749f6c1f09bea51429a07035c9eb3c4939943ee2a7e6e7bd632046e222cad54bb8d422da83762fe59268dfb3bfc7b

  • C:\Users\Admin\AppData\Local\a9773302-c76d-41ac-9415-e41388c41e40\fda422a54b108ec592b499e0dc59e6c6.exe

    MD5

    fda422a54b108ec592b499e0dc59e6c6

    SHA1

    8ee655935d7620a6d2f18f26d0532f9dfa8b56e8

    SHA256

    0e55e17532909ad5ad34eb4e35d791b27c6951dd15a8baba34c29ae572c884d0

    SHA512

    11a8e56836af1b1b86dbea68fc570535d2f74266fecda6fa9e6f90431d9596740632a35fa0ca86d8b9f58706425f3ecda2dc572f3c47bf7e2323c02f43ead52e

  • C:\Users\Admin\AppData\Local\f09a83d7-e522-463d-86a4-2924f39ef0db\5.exe

    MD5

    e1edad05494a14cefa05fa28c3611a6e

    SHA1

    718fe9cf4e4a7272ffa0583c0851e3134d6f1547

    SHA256

    00b09aba4c90b634ce887da826fc74284f171698c203dcfd7da3e8b529ac6db1

    SHA512

    7230dd424bb0e28f436239ab45a7bb93867e9ec8533b3fdd780b430762a0f5f6e8bc514841f09e49be608334f77c8d11b1ae884f032df2c05aca5739cfdacca5

  • C:\Users\Admin\AppData\Local\f09a83d7-e522-463d-86a4-2924f39ef0db\5.exe

    MD5

    e1edad05494a14cefa05fa28c3611a6e

    SHA1

    718fe9cf4e4a7272ffa0583c0851e3134d6f1547

    SHA256

    00b09aba4c90b634ce887da826fc74284f171698c203dcfd7da3e8b529ac6db1

    SHA512

    7230dd424bb0e28f436239ab45a7bb93867e9ec8533b3fdd780b430762a0f5f6e8bc514841f09e49be608334f77c8d11b1ae884f032df2c05aca5739cfdacca5

  • C:\Users\Admin\AppData\Local\f09a83d7-e522-463d-86a4-2924f39ef0db\updatewin.exe

    MD5

    2ba02a23e7b421bb51d9c47665ed540b

    SHA1

    f5e6d401c61760fe7f6edad47a0517fb85d9cdeb

    SHA256

    53430b4106efc011a26b50b14b9cead42607cb1de2a6a7ef7bbb04b960baea92

    SHA512

    16c9c254b8f78212f949d78c5e4679dcc9d365ad3188ffa0d12d6ad7f6f3e41b7db229075c99f31e35b58f7e6764f9177f9d1c4bf3bc5827503a8a793b54ade2

  • C:\Users\Admin\AppData\Local\f09a83d7-e522-463d-86a4-2924f39ef0db\updatewin.exe

    MD5

    2ba02a23e7b421bb51d9c47665ed540b

    SHA1

    f5e6d401c61760fe7f6edad47a0517fb85d9cdeb

    SHA256

    53430b4106efc011a26b50b14b9cead42607cb1de2a6a7ef7bbb04b960baea92

    SHA512

    16c9c254b8f78212f949d78c5e4679dcc9d365ad3188ffa0d12d6ad7f6f3e41b7db229075c99f31e35b58f7e6764f9177f9d1c4bf3bc5827503a8a793b54ade2

  • \ProgramData\mozglue.dll

    MD5

    8f73c08a9660691143661bf7332c3c27

    SHA1

    37fa65dd737c50fda710fdbde89e51374d0c204a

    SHA256

    3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

    SHA512

    0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

  • \ProgramData\nss3.dll

    MD5

    bfac4e3c5908856ba17d41edcd455a51

    SHA1

    8eec7e888767aa9e4cca8ff246eb2aacb9170428

    SHA256

    e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

    SHA512

    2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

  • memory/732-31-0x0000000000000000-mapping.dmp

  • memory/764-35-0x0000000000000000-mapping.dmp

  • memory/1232-5-0x0000000000000000-mapping.dmp

  • memory/2072-15-0x0000000000000000-mapping.dmp

  • memory/2072-24-0x0000000000400000-0x0000000000437000-memory.dmp

    Filesize

    220KB

  • memory/2072-23-0x00000000009C0000-0x00000000009F6000-memory.dmp

    Filesize

    216KB

  • memory/2072-21-0x0000000002550000-0x0000000002551000-memory.dmp

    Filesize

    4KB

  • memory/2484-33-0x0000000000000000-mapping.dmp

  • memory/2488-34-0x0000000000000000-mapping.dmp

  • memory/3060-14-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3060-8-0x0000000002570000-0x0000000002571000-memory.dmp

    Filesize

    4KB

  • memory/3060-7-0x0000000000000000-mapping.dmp

  • memory/3880-28-0x0000000000400000-0x0000000000498000-memory.dmp

    Filesize

    608KB

  • memory/3880-27-0x00000000009A0000-0x0000000000A35000-memory.dmp

    Filesize

    596KB

  • memory/3880-25-0x0000000002550000-0x0000000002551000-memory.dmp

    Filesize

    4KB

  • memory/3880-18-0x0000000000000000-mapping.dmp

  • memory/3896-32-0x0000000000000000-mapping.dmp

  • memory/4040-2-0x00000000025A0000-0x00000000025A1000-memory.dmp

    Filesize

    4KB

  • memory/4040-3-0x00000000025A0000-0x00000000026BA000-memory.dmp

    Filesize

    1.1MB

  • memory/4040-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB