Analysis

  • max time kernel
    74s
  • max time network
    137s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    11-03-2021 17:26

General

  • Target

    dubi.exe

  • Size

    827KB

  • MD5

    648f0d37b65ec97fd1754d53d78a6a24

  • SHA1

    ba9c8a94d83f66f93523345aa7fe266cf9769a0e

  • SHA256

    894efce31cc70924a097c89b02eb544cb1303268b569f39ccbfba492d6c2b166

  • SHA512

    e222e2ef11a00605575bc8431587f9e89dbd6c3579f43cd36c97527385c85e837f831a583ede7a4c3413f6c0c8ff2139c4b1e4821224c6e4f57eb5cd18fe8410

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 local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • 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\dubi.exe
    "C:\Users\Admin\AppData\Local\Temp\dubi.exe"
    1⤵
    • Adds Run key to start application
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:412
    • C:\Windows\SysWOW64\icacls.exe
      icacls "C:\Users\Admin\AppData\Local\df2f2d20-ac8f-4097-a42c-492e892fcab1" /deny *S-1-1-0:(OI)(CI)(DE,DC)
      2⤵
      • Modifies file permissions
      PID:2840
    • C:\Users\Admin\AppData\Local\Temp\dubi.exe
      "C:\Users\Admin\AppData\Local\Temp\dubi.exe" --Admin IsNotAutoStart IsNotTask
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1272
      • C:\Users\Admin\AppData\Local\5078d97f-277a-4946-8982-14cbb8358d0a\updatewin.exe
        "C:\Users\Admin\AppData\Local\5078d97f-277a-4946-8982-14cbb8358d0a\updatewin.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:3108
        • C:\Windows\SysWOW64\cmd.exe
          /c timeout /t 3 & del /f /q C:\Users\Admin\AppData\Local\5078d97f-277a-4946-8982-14cbb8358d0a\updatewin.exe
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:2640
          • C:\Windows\SysWOW64\timeout.exe
            timeout /t 3
            5⤵
            • Delays execution with timeout.exe
            PID:3584
      • C:\Users\Admin\AppData\Local\5078d97f-277a-4946-8982-14cbb8358d0a\5.exe
        "C:\Users\Admin\AppData\Local\5078d97f-277a-4946-8982-14cbb8358d0a\5.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Checks processor information in registry
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:3080
        • 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\5078d97f-277a-4946-8982-14cbb8358d0a\5.exe" & del C:\ProgramData\*.dll & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:3196
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im 5.exe /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:3232
          • C:\Windows\SysWOW64\timeout.exe
            timeout /t 6
            5⤵
            • Delays execution with timeout.exe
            PID:3456

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

File Permissions Modification

1
T1222

Modify Registry

2
T1112

Install Root Certificate

1
T1130

Credential Access

Credentials in Files

5
T1081

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

5
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\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
    MD5

    1697c7bdbf51be4e8b5eed4bb2d96c99

    SHA1

    33e7137f57d09c30d99ac934f2f2dfb094e23bd3

    SHA256

    34458a706a2f38ec2e0d451ba4fc2692024cd23516e0ce136b09b29cfeec96c4

    SHA512

    294436f9930306e5afe604374eb932aaad1cd238df5e41a360f32ec0ece112e4e5d9ccf00529a36f2ea5010729dbe56e44ee0d52b2f36e4177c5652f3425038c

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
    MD5

    ca1458cdb08212fe95b8e013c0bd8dd5

    SHA1

    86d293812cb804c162e7de0e59c7094a83d92340

    SHA256

    2d2b9ee023d9b04c6ae09ad11c6963432ee7b3ab8858d42b4470170b749d3e2f

    SHA512

    3a25602303f7a8eb13f0de44573d57e0b8919ec1a031b3da49cb548d86c1ad9f214b04be22345fad7aca5dc060114c66e2272edfdfd20efd6925c67c43d99f09

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
    MD5

    565fdf0b1f86ed7b4ea88b5c2bda6193

    SHA1

    d22469ee3471a10a0f617b09638245a782a4c915

    SHA256

    84715085518be627a8fbb3833c8c842d38d61a068ff4b68d5fec4375b44f306a

    SHA512

    03b4d36dc83207d6054fdb67f1004d03e89b60542ce48cb618788763ee95f1c4a2aabd03ed33e5a6aa5662f7d1ec9a089c10b3f5b5e14e3ed521ff3b6f3ca3f4

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
    MD5

    2f4825852afa6104038acf3e138770f1

    SHA1

    a44e5538314ab9938145e4ef1c1f2f769c40b6e0

    SHA256

    e6af25eac9ef5a7f431120e91082773c0b23cda15461f75425339f77fef4a176

    SHA512

    d4e851b156f6382cb7a7d969eddc70672e9d3aafbab74242b016e972b7933ecc4604bb4822ba64e620af6607297195a020b1e9850a8a3d83616a00878debc7aa

  • C:\Users\Admin\AppData\Local\5078d97f-277a-4946-8982-14cbb8358d0a\5.exe
    MD5

    6a50d5e91b193be284aa02106ee35e97

    SHA1

    097137cb64eb18ce55c13f1e841d5312d07fbbf4

    SHA256

    82c1ccbd7db7615a982f7b8072784575972aff3f0ab4597efda9d2e7ca17b961

    SHA512

    7f79ef4c3b2cd32e6e1fe6c64d1a693115789665f705144cb912500f25f669f28ac61f709d29057b66bf2a6c1f8376b3a8ef7ccb95668cabf2d15455745f1f03

  • C:\Users\Admin\AppData\Local\5078d97f-277a-4946-8982-14cbb8358d0a\5.exe
    MD5

    6a50d5e91b193be284aa02106ee35e97

    SHA1

    097137cb64eb18ce55c13f1e841d5312d07fbbf4

    SHA256

    82c1ccbd7db7615a982f7b8072784575972aff3f0ab4597efda9d2e7ca17b961

    SHA512

    7f79ef4c3b2cd32e6e1fe6c64d1a693115789665f705144cb912500f25f669f28ac61f709d29057b66bf2a6c1f8376b3a8ef7ccb95668cabf2d15455745f1f03

  • C:\Users\Admin\AppData\Local\5078d97f-277a-4946-8982-14cbb8358d0a\updatewin.exe
    MD5

    9010fa92cc83afe00fab38703e6ffa77

    SHA1

    4d603ec27d02d84a65d1555c2df0896d7675fafc

    SHA256

    38e6f4d8f53e8a38950594d9588cb00218bf46113c51b5241771181a521b9c75

    SHA512

    a39ea249da189fedd5f8d1c13d03693626c70ba08c69c4ec76396d3475c5480e98c8dba1da0b74089252d8d781fc050e4eed9346b648ccbb42e22cf6d15399e8

  • C:\Users\Admin\AppData\Local\5078d97f-277a-4946-8982-14cbb8358d0a\updatewin.exe
    MD5

    9010fa92cc83afe00fab38703e6ffa77

    SHA1

    4d603ec27d02d84a65d1555c2df0896d7675fafc

    SHA256

    38e6f4d8f53e8a38950594d9588cb00218bf46113c51b5241771181a521b9c75

    SHA512

    a39ea249da189fedd5f8d1c13d03693626c70ba08c69c4ec76396d3475c5480e98c8dba1da0b74089252d8d781fc050e4eed9346b648ccbb42e22cf6d15399e8

  • C:\Users\Admin\AppData\Local\df2f2d20-ac8f-4097-a42c-492e892fcab1\dubi.exe
    MD5

    648f0d37b65ec97fd1754d53d78a6a24

    SHA1

    ba9c8a94d83f66f93523345aa7fe266cf9769a0e

    SHA256

    894efce31cc70924a097c89b02eb544cb1303268b569f39ccbfba492d6c2b166

    SHA512

    e222e2ef11a00605575bc8431587f9e89dbd6c3579f43cd36c97527385c85e837f831a583ede7a4c3413f6c0c8ff2139c4b1e4821224c6e4f57eb5cd18fe8410

  • \ProgramData\mozglue.dll
    MD5

    8f73c08a9660691143661bf7332c3c27

    SHA1

    37fa65dd737c50fda710fdbde89e51374d0c204a

    SHA256

    3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

    SHA512

    0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

  • \ProgramData\nss3.dll
    MD5

    bfac4e3c5908856ba17d41edcd455a51

    SHA1

    8eec7e888767aa9e4cca8ff246eb2aacb9170428

    SHA256

    e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

    SHA512

    2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

  • memory/412-2-0x0000000000D00000-0x0000000000D01000-memory.dmp
    Filesize

    4KB

  • memory/412-3-0x0000000000D00000-0x0000000000E1A000-memory.dmp
    Filesize

    1.1MB

  • memory/412-4-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/1272-7-0x0000000000000000-mapping.dmp
  • memory/1272-8-0x0000000000CF0000-0x0000000000CF1000-memory.dmp
    Filesize

    4KB

  • memory/1272-14-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2640-23-0x0000000000000000-mapping.dmp
  • memory/2840-5-0x0000000000000000-mapping.dmp
  • memory/3080-18-0x0000000000000000-mapping.dmp
  • memory/3108-15-0x0000000000000000-mapping.dmp
  • memory/3196-25-0x0000000000000000-mapping.dmp
  • memory/3232-26-0x0000000000000000-mapping.dmp
  • memory/3456-27-0x0000000000000000-mapping.dmp
  • memory/3584-24-0x0000000000000000-mapping.dmp