Analysis

  • max time kernel
    97s
  • max time network
    133s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    26-09-2021 12:02

General

  • Target

    801fc7cfb15d34805610093de83b9eee582d882907f2544ff6afec9fb70f2bbc.exe

  • Size

    693KB

  • MD5

    2bd754f7114cbc3ec492d50b9ab27f9f

  • SHA1

    f18fa720928f1e317f1683cd2d9bfc830fe19707

  • SHA256

    801fc7cfb15d34805610093de83b9eee582d882907f2544ff6afec9fb70f2bbc

  • SHA512

    9a0a43be2214f099aaca7f8682622d65b4fe542f2acd8b3c5601bf79f92508b530ce2e3f9244588704f0765f25445139ffd67e82c928d962a4bc452cdea9daac

Malware Config

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.

  • 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\801fc7cfb15d34805610093de83b9eee582d882907f2544ff6afec9fb70f2bbc.exe
    "C:\Users\Admin\AppData\Local\Temp\801fc7cfb15d34805610093de83b9eee582d882907f2544ff6afec9fb70f2bbc.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:656
    • C:\Users\Admin\AppData\Local\Temp\801fc7cfb15d34805610093de83b9eee582d882907f2544ff6afec9fb70f2bbc.exe
      "C:\Users\Admin\AppData\Local\Temp\801fc7cfb15d34805610093de83b9eee582d882907f2544ff6afec9fb70f2bbc.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:856
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\4cf07fd0-ca85-48ab-a6c0-abd9eff1d7ba" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1272
      • C:\Users\Admin\AppData\Local\Temp\801fc7cfb15d34805610093de83b9eee582d882907f2544ff6afec9fb70f2bbc.exe
        "C:\Users\Admin\AppData\Local\Temp\801fc7cfb15d34805610093de83b9eee582d882907f2544ff6afec9fb70f2bbc.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1452
        • C:\Users\Admin\AppData\Local\Temp\801fc7cfb15d34805610093de83b9eee582d882907f2544ff6afec9fb70f2bbc.exe
          "C:\Users\Admin\AppData\Local\Temp\801fc7cfb15d34805610093de83b9eee582d882907f2544ff6afec9fb70f2bbc.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:1828
          • C:\Users\Admin\AppData\Local\7d0c280e-be1b-4f49-98a2-6404883ffbdf\build2.exe
            "C:\Users\Admin\AppData\Local\7d0c280e-be1b-4f49-98a2-6404883ffbdf\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:2452
            • C:\Users\Admin\AppData\Local\7d0c280e-be1b-4f49-98a2-6404883ffbdf\build2.exe
              "C:\Users\Admin\AppData\Local\7d0c280e-be1b-4f49-98a2-6404883ffbdf\build2.exe"
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Checks processor information in registry
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of WriteProcessMemory
              PID:2712
              • 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\7d0c280e-be1b-4f49-98a2-6404883ffbdf\build2.exe" & del C:\ProgramData\*.dll & exit
                7⤵
                • Suspicious use of WriteProcessMemory
                PID:3448
                • C:\Windows\SysWOW64\taskkill.exe
                  taskkill /im build2.exe /f
                  8⤵
                  • Kills process with taskkill
                  • Suspicious use of AdjustPrivilegeToken
                  PID:3908
                • C:\Windows\SysWOW64\timeout.exe
                  timeout /t 6
                  8⤵
                  • Delays execution with timeout.exe
                  PID:972

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

    57ba3fd55153ccfffc38981d45eb27ef

    SHA1

    8b89079e2a405fe04a1a87fe901d88982ef516cb

    SHA256

    19d84b87ec3acb0894fbbb2c95b23053373568282aa6817da64607ed3225dcef

    SHA512

    58ae33ebb38e6bec6332b9085f8b41850b53d7de804bc87a462f9ce7b1e960051d3682fb87a14c159041a7577a36af95cb2edf971e4d23c902d583da9945c0b4

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

    3f5ce173eed18d061760acea4c8f69f3

    SHA1

    c8a02499ede88cb10496fbbc77fee1f2757e6629

    SHA256

    b7666f21ebc73a75f02fefbf7d6f17700897b69301eae07ce4bab6b32ab107c8

    SHA512

    22f7b2af2a230e7f6ae2830d27b5769c07f0c3f8d327cfb6be6a4c632af012e823e303514c62dac8f70c973e4df81aeba10138a930d4a8880caf18c8a7062d24

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

    32e3b974580ddc42a656bd730c4de2e5

    SHA1

    fbc6104e205dfc176997d58c43dd53efefc5e4bb

    SHA256

    601c4bdbd4ad19e1cdf059cc9238084a021a8412563dade70bcaa26c9c826127

    SHA512

    3f85f626c612dac25d640711da7797faa2645771dfca84d72f9fa3993a1da5bf7ce5d5cb946467ed916843fabcecafb8948e1b218e3898862ed77afe258b875c

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

    63579bb0274b04ad8a5fb0f28b1f6ebe

    SHA1

    5d898162272eef041b0e5c49f673f319a681e895

    SHA256

    15b46f781541588d34d1baafe7dd81005946ba56d484f65d8b7aa36dd26d0f14

    SHA512

    17c3b8aaf563b5d251f8acaf2bf80a62402e1d31f7c16d432bdc1e1e4f7282cebd60eedc3b9ce5c229b74de9207d2b6af6d72f1f33ceb04b2c98075f48afffe9

  • C:\Users\Admin\AppData\Local\4cf07fd0-ca85-48ab-a6c0-abd9eff1d7ba\801fc7cfb15d34805610093de83b9eee582d882907f2544ff6afec9fb70f2bbc.exe
    MD5

    2bd754f7114cbc3ec492d50b9ab27f9f

    SHA1

    f18fa720928f1e317f1683cd2d9bfc830fe19707

    SHA256

    801fc7cfb15d34805610093de83b9eee582d882907f2544ff6afec9fb70f2bbc

    SHA512

    9a0a43be2214f099aaca7f8682622d65b4fe542f2acd8b3c5601bf79f92508b530ce2e3f9244588704f0765f25445139ffd67e82c928d962a4bc452cdea9daac

  • C:\Users\Admin\AppData\Local\7d0c280e-be1b-4f49-98a2-6404883ffbdf\build2.exe
    MD5

    7c48019f424bbd08de9d0c7d66e0ea7c

    SHA1

    1394ad4f1fd9a7109e179695d4b404eaca70fa88

    SHA256

    33d15dacd2b4951517f39aa2e12afa747ddc5785b0ef3c2d78c3db16cae97d7c

    SHA512

    63cf0ee393e8a3dec78a06dd0a478a993143bc9061acdb828fa6edecc5d45b286aa081d0ed99819ab8d8c95345eac73658c819eefdf6efa30da877af7374e322

  • C:\Users\Admin\AppData\Local\7d0c280e-be1b-4f49-98a2-6404883ffbdf\build2.exe
    MD5

    7c48019f424bbd08de9d0c7d66e0ea7c

    SHA1

    1394ad4f1fd9a7109e179695d4b404eaca70fa88

    SHA256

    33d15dacd2b4951517f39aa2e12afa747ddc5785b0ef3c2d78c3db16cae97d7c

    SHA512

    63cf0ee393e8a3dec78a06dd0a478a993143bc9061acdb828fa6edecc5d45b286aa081d0ed99819ab8d8c95345eac73658c819eefdf6efa30da877af7374e322

  • C:\Users\Admin\AppData\Local\7d0c280e-be1b-4f49-98a2-6404883ffbdf\build2.exe
    MD5

    7c48019f424bbd08de9d0c7d66e0ea7c

    SHA1

    1394ad4f1fd9a7109e179695d4b404eaca70fa88

    SHA256

    33d15dacd2b4951517f39aa2e12afa747ddc5785b0ef3c2d78c3db16cae97d7c

    SHA512

    63cf0ee393e8a3dec78a06dd0a478a993143bc9061acdb828fa6edecc5d45b286aa081d0ed99819ab8d8c95345eac73658c819eefdf6efa30da877af7374e322

  • \ProgramData\mozglue.dll
    MD5

    8f73c08a9660691143661bf7332c3c27

    SHA1

    37fa65dd737c50fda710fdbde89e51374d0c204a

    SHA256

    3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

    SHA512

    0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

  • \ProgramData\nss3.dll
    MD5

    bfac4e3c5908856ba17d41edcd455a51

    SHA1

    8eec7e888767aa9e4cca8ff246eb2aacb9170428

    SHA256

    e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

    SHA512

    2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

  • memory/656-114-0x00000000023B0000-0x00000000024CB000-memory.dmp
    Filesize

    1.1MB

  • memory/856-117-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/856-116-0x0000000000424141-mapping.dmp
  • memory/856-115-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/972-140-0x0000000000000000-mapping.dmp
  • memory/1272-118-0x0000000000000000-mapping.dmp
  • memory/1452-120-0x0000000000000000-mapping.dmp
  • memory/1828-127-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/1828-122-0x0000000000424141-mapping.dmp
  • memory/2452-134-0x0000000003160000-0x0000000003234000-memory.dmp
    Filesize

    848KB

  • memory/2452-128-0x0000000000000000-mapping.dmp
  • memory/2712-131-0x0000000000400000-0x00000000004D7000-memory.dmp
    Filesize

    860KB

  • memory/2712-135-0x0000000000400000-0x00000000004D7000-memory.dmp
    Filesize

    860KB

  • memory/2712-132-0x00000000004A032D-mapping.dmp
  • memory/3448-138-0x0000000000000000-mapping.dmp
  • memory/3908-139-0x0000000000000000-mapping.dmp