Analysis

  • max time kernel
    122s
  • max time network
    122s
  • platform
    windows10_x64
  • resource
    win10-en-20211104
  • submitted
    25-11-2021 16:12

General

  • Target

    9a9da7772d6967bff13dec89368a256b58b43b067004cadb8edd866ff25b52db.exe

  • Size

    814KB

  • MD5

    a2c8ea8b973f5599e1ce5de45ae6d663

  • SHA1

    36b988e54c2b5d90d4b6d1214bcd305e034e1ecb

  • SHA256

    9a9da7772d6967bff13dec89368a256b58b43b067004cadb8edd866ff25b52db

  • SHA512

    94e0b3fb34f9433dc6f344b62979ded26a885f807bb4aa6e3a5c756248a873ab8e386bc079cfa65fc0831e082d324a1afccf5efc8367f72129733f5eb30b25d6

Malware Config

Extracted

Family

djvu

C2

http://tzgl.org/fhsgtsspen6/get.php

Attributes
  • extension

    .rigj

  • offline_id

    Z5GGASEfY71jtxU3i3E8kzvrTJmY9oiZkjcSm0t1

  • payload_url

    http://kotob.top/dl/build2.exe

    http://tzgl.org/files/1/build3.exe

  • ransomnote

    ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https://we.tl/t-Tjb0YqckGX Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: manager@mailtemp.ch Reserve e-mail address to contact us: helprestoremanager@airmail.cc Your personal ID: 0353gSd743d

rsa_pubkey.plain

Extracted

Family

vidar

Version

48.7

Botnet

517

C2

https://mstdn.social/@anapa

https://mastodon.social/@mniami

Attributes
  • profile_id

    517

Signatures

  • Detected Djvu ransomware 6 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request

    suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request

  • Vidar Stealer 4 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Modifies file permissions 1 TTPs 1 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
  • 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.

  • Suspicious use of SetThreadContext 3 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.

  • Delays execution with timeout.exe 1 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 46 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\9a9da7772d6967bff13dec89368a256b58b43b067004cadb8edd866ff25b52db.exe
    "C:\Users\Admin\AppData\Local\Temp\9a9da7772d6967bff13dec89368a256b58b43b067004cadb8edd866ff25b52db.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3580
    • C:\Users\Admin\AppData\Local\Temp\9a9da7772d6967bff13dec89368a256b58b43b067004cadb8edd866ff25b52db.exe
      "C:\Users\Admin\AppData\Local\Temp\9a9da7772d6967bff13dec89368a256b58b43b067004cadb8edd866ff25b52db.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3012
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\3adcd2bb-4f84-4590-99e3-93ff6cd4536c" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4356
      • C:\Users\Admin\AppData\Local\Temp\9a9da7772d6967bff13dec89368a256b58b43b067004cadb8edd866ff25b52db.exe
        "C:\Users\Admin\AppData\Local\Temp\9a9da7772d6967bff13dec89368a256b58b43b067004cadb8edd866ff25b52db.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4212
        • C:\Users\Admin\AppData\Local\Temp\9a9da7772d6967bff13dec89368a256b58b43b067004cadb8edd866ff25b52db.exe
          "C:\Users\Admin\AppData\Local\Temp\9a9da7772d6967bff13dec89368a256b58b43b067004cadb8edd866ff25b52db.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:4516
          • C:\Users\Admin\AppData\Local\ed98688c-49e5-4e90-a539-726523997e05\build2.exe
            "C:\Users\Admin\AppData\Local\ed98688c-49e5-4e90-a539-726523997e05\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:924
            • C:\Users\Admin\AppData\Local\ed98688c-49e5-4e90-a539-726523997e05\build2.exe
              "C:\Users\Admin\AppData\Local\ed98688c-49e5-4e90-a539-726523997e05\build2.exe"
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Checks processor information in registry
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of WriteProcessMemory
              PID:880
              • C:\Windows\SysWOW64\cmd.exe
                "C:\Windows\System32\cmd.exe" /c taskkill /im build2.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\ed98688c-49e5-4e90-a539-726523997e05\build2.exe" & del C:\ProgramData\*.dll & exit
                7⤵
                • Suspicious use of WriteProcessMemory
                PID:1636
                • C:\Windows\SysWOW64\taskkill.exe
                  taskkill /im build2.exe /f
                  8⤵
                  • Kills process with taskkill
                  • Suspicious use of AdjustPrivilegeToken
                  PID:1880
                • C:\Windows\SysWOW64\timeout.exe
                  timeout /t 6
                  8⤵
                  • Delays execution with timeout.exe
                  PID:2416

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

3
T1081

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

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

    f38465988ba273bb822b84568d682669

    SHA1

    566d8520422def07cdd88475317401d28aafb381

    SHA256

    94f64b5a32e13b896b8cefb103757a4e4ae5d1c4df3f4ce6a8f0747e83ce5d7d

    SHA512

    68796c406f4cada9e11a467f4aea3d8e6555173c94a125b93e06219139b983c813f94d6da98b0849e01e26255ef16d10274d9e67aaca3aaa77e35b6ac64a52a4

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

    bb5b6bfd10c107593232ff1254853e03

    SHA1

    0a8a2aa6efec37e8b425a91c90f27d9de1b125e9

    SHA256

    6783b1f10f27824de2708f3eec3d1d0e080ce94457b256afd8f6ce1409e6e8ba

    SHA512

    48973f31f7fcd5795fdfefb63fb5e6b41a375dc57b57052f632f6a8fecf47ae6ba90fafb0946a28b7b631c40095c1b8ad62cef20ce8a2111af5a750425519bf4

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

    f0baed015a1c8f9af3f3b436f151bb32

    SHA1

    2dab631c50d339d0cab2f62ca45fec343c352a2b

    SHA256

    fdcd2b5edeed80b0d33cbd621149400d3591a19be8284655114c382f42ccb057

    SHA512

    8ae6df5b548f372c29d4c2c07e9f85c93ad5f4f10569c3588755aabcf879d71a726ea1a0af25f9e67ce4d2d42531e537c5a7174e5e9c37fffc3f679abaad9f05

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

    9342617a083bb01ae640439a332d57f2

    SHA1

    22cca0409712d7d0e28af7aed96d6e8acd89b127

    SHA256

    d02b7e9b038c1563f4ff043aced4f67198c439c1efb4dc6fc6d724206480a46c

    SHA512

    5a2a108e05df2c32b11e8a6e1c349a500c4089948fce1f0253464e2ad03176ae5a58458ff0a366fb62b0c78623bba8a65fec6f4a4cb796647f4bfa4cad089a5f

  • C:\Users\Admin\AppData\Local\3adcd2bb-4f84-4590-99e3-93ff6cd4536c\9a9da7772d6967bff13dec89368a256b58b43b067004cadb8edd866ff25b52db.exe
    MD5

    a2c8ea8b973f5599e1ce5de45ae6d663

    SHA1

    36b988e54c2b5d90d4b6d1214bcd305e034e1ecb

    SHA256

    9a9da7772d6967bff13dec89368a256b58b43b067004cadb8edd866ff25b52db

    SHA512

    94e0b3fb34f9433dc6f344b62979ded26a885f807bb4aa6e3a5c756248a873ab8e386bc079cfa65fc0831e082d324a1afccf5efc8367f72129733f5eb30b25d6

  • C:\Users\Admin\AppData\Local\ed98688c-49e5-4e90-a539-726523997e05\build2.exe
    MD5

    bc8eaaafd8feb26a72f74dcdb99c7865

    SHA1

    818aa87338d4df601db15f976b70b016e2e23d06

    SHA256

    9d4f3c4a7bce15559a9501b2c7d2ecf8f005a1b325dd407dff8054ed0e3e9b17

    SHA512

    c49c05d3663529b949863cb714d3cbfe7869551e4a6b57dc5281c7ba569fe1c90481a135fb689edf8bd7121b48fd78eb9efe2a0d8960023d161ec0f47f5bfcad

  • C:\Users\Admin\AppData\Local\ed98688c-49e5-4e90-a539-726523997e05\build2.exe
    MD5

    bc8eaaafd8feb26a72f74dcdb99c7865

    SHA1

    818aa87338d4df601db15f976b70b016e2e23d06

    SHA256

    9d4f3c4a7bce15559a9501b2c7d2ecf8f005a1b325dd407dff8054ed0e3e9b17

    SHA512

    c49c05d3663529b949863cb714d3cbfe7869551e4a6b57dc5281c7ba569fe1c90481a135fb689edf8bd7121b48fd78eb9efe2a0d8960023d161ec0f47f5bfcad

  • C:\Users\Admin\AppData\Local\ed98688c-49e5-4e90-a539-726523997e05\build2.exe
    MD5

    bc8eaaafd8feb26a72f74dcdb99c7865

    SHA1

    818aa87338d4df601db15f976b70b016e2e23d06

    SHA256

    9d4f3c4a7bce15559a9501b2c7d2ecf8f005a1b325dd407dff8054ed0e3e9b17

    SHA512

    c49c05d3663529b949863cb714d3cbfe7869551e4a6b57dc5281c7ba569fe1c90481a135fb689edf8bd7121b48fd78eb9efe2a0d8960023d161ec0f47f5bfcad

  • \ProgramData\mozglue.dll
    MD5

    8f73c08a9660691143661bf7332c3c27

    SHA1

    37fa65dd737c50fda710fdbde89e51374d0c204a

    SHA256

    3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

    SHA512

    0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

  • \ProgramData\nss3.dll
    MD5

    bfac4e3c5908856ba17d41edcd455a51

    SHA1

    8eec7e888767aa9e4cca8ff246eb2aacb9170428

    SHA256

    e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

    SHA512

    2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

  • memory/880-138-0x0000000000400000-0x00000000004D8000-memory.dmp
    Filesize

    864KB

  • memory/880-139-0x00000000004A140D-mapping.dmp
  • memory/880-142-0x0000000000400000-0x00000000004D8000-memory.dmp
    Filesize

    864KB

  • memory/924-134-0x0000000000000000-mapping.dmp
  • memory/924-137-0x0000000002D79000-0x0000000002DF5000-memory.dmp
    Filesize

    496KB

  • memory/924-141-0x0000000004800000-0x00000000048D5000-memory.dmp
    Filesize

    852KB

  • memory/1636-145-0x0000000000000000-mapping.dmp
  • memory/1880-146-0x0000000000000000-mapping.dmp
  • memory/2416-147-0x0000000000000000-mapping.dmp
  • memory/3012-122-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/3012-120-0x0000000000424141-mapping.dmp
  • memory/3012-119-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/3580-118-0x0000000003A37000-0x0000000003AC8000-memory.dmp
    Filesize

    580KB

  • memory/3580-121-0x0000000003B80000-0x0000000003C9B000-memory.dmp
    Filesize

    1.1MB

  • memory/4212-126-0x000000000390D000-0x000000000399E000-memory.dmp
    Filesize

    580KB

  • memory/4212-125-0x0000000000000000-mapping.dmp
  • memory/4356-123-0x0000000000000000-mapping.dmp
  • memory/4516-128-0x0000000000424141-mapping.dmp
  • memory/4516-133-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB