Analysis

  • max time kernel
    88s
  • max time network
    129s
  • platform
    windows10_x64
  • resource
    win10-en-20211104
  • submitted
    25-11-2021 17:00

General

  • Target

    62230344742f705d462b56935f21b509ec6822cff4da59b438bbfc4e70625fc6.exe

  • Size

    814KB

  • MD5

    f6465973baddb541a77b1658a72d6ddf

  • SHA1

    432cc1e29b6352054533411f4adf03aaa4bd7976

  • SHA256

    62230344742f705d462b56935f21b509ec6822cff4da59b438bbfc4e70625fc6

  • SHA512

    e228cbbb2d26994e16071094389b966ef79a84eab2cc8d6881354cf034e540b04f9e0df1e535cf845ee228b01755469c579808d7c0ea9c722e8dcebf048627e0

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

  • 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

  • suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil

    suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil

  • 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\62230344742f705d462b56935f21b509ec6822cff4da59b438bbfc4e70625fc6.exe
    "C:\Users\Admin\AppData\Local\Temp\62230344742f705d462b56935f21b509ec6822cff4da59b438bbfc4e70625fc6.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2468
    • C:\Users\Admin\AppData\Local\Temp\62230344742f705d462b56935f21b509ec6822cff4da59b438bbfc4e70625fc6.exe
      "C:\Users\Admin\AppData\Local\Temp\62230344742f705d462b56935f21b509ec6822cff4da59b438bbfc4e70625fc6.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3856
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\4dfcfe09-03ab-49cb-b0c7-1c7ed7a93d8f" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1268
      • C:\Users\Admin\AppData\Local\Temp\62230344742f705d462b56935f21b509ec6822cff4da59b438bbfc4e70625fc6.exe
        "C:\Users\Admin\AppData\Local\Temp\62230344742f705d462b56935f21b509ec6822cff4da59b438bbfc4e70625fc6.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:708
        • C:\Users\Admin\AppData\Local\Temp\62230344742f705d462b56935f21b509ec6822cff4da59b438bbfc4e70625fc6.exe
          "C:\Users\Admin\AppData\Local\Temp\62230344742f705d462b56935f21b509ec6822cff4da59b438bbfc4e70625fc6.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:3592
          • C:\Users\Admin\AppData\Local\fc39d3e3-e265-4a94-adbb-7948fc9dffb2\build2.exe
            "C:\Users\Admin\AppData\Local\fc39d3e3-e265-4a94-adbb-7948fc9dffb2\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:1320
            • C:\Users\Admin\AppData\Local\fc39d3e3-e265-4a94-adbb-7948fc9dffb2\build2.exe
              "C:\Users\Admin\AppData\Local\fc39d3e3-e265-4a94-adbb-7948fc9dffb2\build2.exe"
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Checks processor information in registry
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of WriteProcessMemory
              PID:1124
              • 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\fc39d3e3-e265-4a94-adbb-7948fc9dffb2\build2.exe" & del C:\ProgramData\*.dll & exit
                7⤵
                • Suspicious use of WriteProcessMemory
                PID:1120
                • C:\Windows\SysWOW64\taskkill.exe
                  taskkill /im build2.exe /f
                  8⤵
                  • Kills process with taskkill
                  • Suspicious use of AdjustPrivilegeToken
                  PID:2228
                • C:\Windows\SysWOW64\timeout.exe
                  timeout /t 6
                  8⤵
                  • Delays execution with timeout.exe
                  PID:2124

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

    7de2c187e5ce50e25d779cf3c9babcdf

    SHA1

    47597a52d02f5f52b3db65e99d1c90a53d542433

    SHA256

    2a56b992f22aa45f36847d6b3044a77202506e96b7bf4ebb81596322e5915325

    SHA512

    757fd427d54f803563a9e2346a619ff7ee41520673ed5971a7bfc74c04aeea1692d16e18da7c5e92e7f240801abcd92d9b6c2e892d4273af94287e02c497f557

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

    e44dd05e2551c8fbd7e6dff33c350c1e

    SHA1

    80019b648dcedbcd52172f53b99a9ba46f6fdb72

    SHA256

    48f7da8d37d1afb4037ea5e6fe5bf3e871a2bef8cc05d2354e87245c569b6a3c

    SHA512

    022a379d8aff63489b76df985b8c86bd95a7cce693723cd8ee9d7bf0fcbffaa5e0bd2ccf5ca5519204190ad0a848792f266041d78b966c7f7f947348d71d5a9e

  • C:\Users\Admin\AppData\Local\4dfcfe09-03ab-49cb-b0c7-1c7ed7a93d8f\62230344742f705d462b56935f21b509ec6822cff4da59b438bbfc4e70625fc6.exe
    MD5

    f6465973baddb541a77b1658a72d6ddf

    SHA1

    432cc1e29b6352054533411f4adf03aaa4bd7976

    SHA256

    62230344742f705d462b56935f21b509ec6822cff4da59b438bbfc4e70625fc6

    SHA512

    e228cbbb2d26994e16071094389b966ef79a84eab2cc8d6881354cf034e540b04f9e0df1e535cf845ee228b01755469c579808d7c0ea9c722e8dcebf048627e0

  • C:\Users\Admin\AppData\Local\fc39d3e3-e265-4a94-adbb-7948fc9dffb2\build2.exe
    MD5

    bc8eaaafd8feb26a72f74dcdb99c7865

    SHA1

    818aa87338d4df601db15f976b70b016e2e23d06

    SHA256

    9d4f3c4a7bce15559a9501b2c7d2ecf8f005a1b325dd407dff8054ed0e3e9b17

    SHA512

    c49c05d3663529b949863cb714d3cbfe7869551e4a6b57dc5281c7ba569fe1c90481a135fb689edf8bd7121b48fd78eb9efe2a0d8960023d161ec0f47f5bfcad

  • C:\Users\Admin\AppData\Local\fc39d3e3-e265-4a94-adbb-7948fc9dffb2\build2.exe
    MD5

    bc8eaaafd8feb26a72f74dcdb99c7865

    SHA1

    818aa87338d4df601db15f976b70b016e2e23d06

    SHA256

    9d4f3c4a7bce15559a9501b2c7d2ecf8f005a1b325dd407dff8054ed0e3e9b17

    SHA512

    c49c05d3663529b949863cb714d3cbfe7869551e4a6b57dc5281c7ba569fe1c90481a135fb689edf8bd7121b48fd78eb9efe2a0d8960023d161ec0f47f5bfcad

  • C:\Users\Admin\AppData\Local\fc39d3e3-e265-4a94-adbb-7948fc9dffb2\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/708-125-0x0000000000000000-mapping.dmp
  • memory/1120-145-0x0000000000000000-mapping.dmp
  • memory/1124-139-0x00000000004A140D-mapping.dmp
  • memory/1124-138-0x0000000000400000-0x00000000004D8000-memory.dmp
    Filesize

    864KB

  • memory/1124-142-0x0000000000400000-0x00000000004D8000-memory.dmp
    Filesize

    864KB

  • memory/1268-122-0x0000000000000000-mapping.dmp
  • memory/1320-137-0x0000000002C09000-0x0000000002C85000-memory.dmp
    Filesize

    496KB

  • memory/1320-141-0x0000000004780000-0x0000000004855000-memory.dmp
    Filesize

    852KB

  • memory/1320-134-0x0000000000000000-mapping.dmp
  • memory/2124-147-0x0000000000000000-mapping.dmp
  • memory/2228-146-0x0000000000000000-mapping.dmp
  • memory/2468-118-0x0000000001ED0000-0x0000000001F61000-memory.dmp
    Filesize

    580KB

  • memory/2468-121-0x00000000039F0000-0x0000000003B0B000-memory.dmp
    Filesize

    1.1MB

  • memory/3592-133-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/3592-128-0x0000000000424141-mapping.dmp
  • memory/3856-124-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/3856-120-0x0000000000424141-mapping.dmp
  • memory/3856-119-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB