Analysis

  • max time kernel
    64s
  • max time network
    127s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    22-07-2021 02:42

General

  • Target

    a66ed6740deb55cd92216f556c7c15fdcf7697c7b4c70891fc0cad901da16d48.exe

  • Size

    770KB

  • MD5

    57ea6784a0d59a7e9d28115727da7c47

  • SHA1

    6d40f68df4ddd5cfd01fb70055736f1c87a73e1d

  • SHA256

    a66ed6740deb55cd92216f556c7c15fdcf7697c7b4c70891fc0cad901da16d48

  • SHA512

    e67ea92a6a32c6d0dadbb37a1c8d7e3689c457c4707cf5daf51c22c47b003a3026f631293035112b9c725467f7e704b454c1b7ca17d4dd4e78ba97a7c2624188

Malware Config

Extracted

Family

vidar

Version

39.6

Botnet

517

C2

https://sslamlssa1.tumblr.com/

Attributes
  • profile_id

    517

Signatures

  • 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\a66ed6740deb55cd92216f556c7c15fdcf7697c7b4c70891fc0cad901da16d48.exe
    "C:\Users\Admin\AppData\Local\Temp\a66ed6740deb55cd92216f556c7c15fdcf7697c7b4c70891fc0cad901da16d48.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3424
    • C:\Users\Admin\AppData\Local\Temp\a66ed6740deb55cd92216f556c7c15fdcf7697c7b4c70891fc0cad901da16d48.exe
      "C:\Users\Admin\AppData\Local\Temp\a66ed6740deb55cd92216f556c7c15fdcf7697c7b4c70891fc0cad901da16d48.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2612
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\12c70348-b77f-447d-9aa3-93787848b807" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2588
      • C:\Users\Admin\AppData\Local\Temp\a66ed6740deb55cd92216f556c7c15fdcf7697c7b4c70891fc0cad901da16d48.exe
        "C:\Users\Admin\AppData\Local\Temp\a66ed6740deb55cd92216f556c7c15fdcf7697c7b4c70891fc0cad901da16d48.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:188
        • C:\Users\Admin\AppData\Local\Temp\a66ed6740deb55cd92216f556c7c15fdcf7697c7b4c70891fc0cad901da16d48.exe
          "C:\Users\Admin\AppData\Local\Temp\a66ed6740deb55cd92216f556c7c15fdcf7697c7b4c70891fc0cad901da16d48.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:3684
          • C:\Users\Admin\AppData\Local\0abaa27e-0914-4839-8be3-ccc0b2b00c80\build2.exe
            "C:\Users\Admin\AppData\Local\0abaa27e-0914-4839-8be3-ccc0b2b00c80\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:3116
            • C:\Users\Admin\AppData\Local\0abaa27e-0914-4839-8be3-ccc0b2b00c80\build2.exe
              "C:\Users\Admin\AppData\Local\0abaa27e-0914-4839-8be3-ccc0b2b00c80\build2.exe"
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Checks processor information in registry
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of WriteProcessMemory
              PID:588
              • 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\0abaa27e-0914-4839-8be3-ccc0b2b00c80\build2.exe" & del C:\ProgramData\*.dll & exit
                7⤵
                • Suspicious use of WriteProcessMemory
                PID:4012
                • C:\Windows\SysWOW64\taskkill.exe
                  taskkill /im build2.exe /f
                  8⤵
                  • Kills process with taskkill
                  • Suspicious use of AdjustPrivilegeToken
                  PID:3856
                • C:\Windows\SysWOW64\timeout.exe
                  timeout /t 6
                  8⤵
                  • Delays execution with timeout.exe
                  PID:204

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

    12f9f4ed75c06441662a76909ee926fa

    SHA1

    e63cd517f59bad52bb18f6194bc16e35c801d66b

    SHA256

    a087b8dbd6fd00df49729b93bc2545e8b67b15df7fd01744adf7c7a70ec1c714

    SHA512

    e11879a36cd44500180ce7217771682723e2ebe4b16f2ba1f0610480db0e742f01f780feb7bc41c2d46413be4fa052dbc6b121bedb84ea4ea2005b9e3c044a12

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

    MD5

    aef6170147fedcea68415eb22f958d71

    SHA1

    3b7a51f810c9c18a557d3ab3cad0b90b8657d0ee

    SHA256

    bb2a64e07a2c7fa817c7d1674d4a4fa9d4ac75cadf600b3db895be4bbac041e9

    SHA512

    3f1f168fc71b0dc4d67329201962446452202cc22145f38c9c84895f4064a330212cebce4cbdd51588803b39e23e1a5a10bd88058a47556b55518894fc6e878f

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

    MD5

    60ab538a0b7aeb83ea310663e9a12c0b

    SHA1

    21f2eb68aed7f8b6472745ab8ab38d61dee4da27

    SHA256

    8ccee5e0aa2619aa3794a96b79f6f734931e45bc8f33af1e0a56bb5af0d8931b

    SHA512

    6eaf761605065957b8222b9c6b60d850a80f7f91daa376a3c6a25ff499b90be61998b0885e2237b0c1b98b12fc0f9d3fabea4921e171f5fa8988d455a07447c9

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

    MD5

    d110a995cebe644abff9476197dab605

    SHA1

    b5da1268d2a92ce8ec2f95d40da1916f7b08e765

    SHA256

    c6ff8b10471a5dacbe9075f8c2624b529e77dc96a54d4826340dd0ac0f9a42d5

    SHA512

    14e637134f48f65005354553028667398545133ffba5f11d652e65b63c632667b54242274a615f2bcb655fd7b6771ff91129bcdfca6c55d32d34b8a95de99d60

  • C:\Users\Admin\AppData\Local\0abaa27e-0914-4839-8be3-ccc0b2b00c80\build2.exe

    MD5

    66bde9ddd0fb80ac7309176c23d03804

    SHA1

    45cd868973bac9c1808efdf19fd88dfd742cf7b4

    SHA256

    0a798e054fbe8545d4e1df781f3bb1a45b2fc58b5fb8d1c7383be8980aea829a

    SHA512

    65089ca60de87ee1557ac907bfac2f14d02ef55d3d687c9fb4b0628dcb35f32ae9507c1eebb435f079a0b3ca19ea635a77ebc3dbc24ffc8032d23e291cc36b03

  • C:\Users\Admin\AppData\Local\0abaa27e-0914-4839-8be3-ccc0b2b00c80\build2.exe

    MD5

    66bde9ddd0fb80ac7309176c23d03804

    SHA1

    45cd868973bac9c1808efdf19fd88dfd742cf7b4

    SHA256

    0a798e054fbe8545d4e1df781f3bb1a45b2fc58b5fb8d1c7383be8980aea829a

    SHA512

    65089ca60de87ee1557ac907bfac2f14d02ef55d3d687c9fb4b0628dcb35f32ae9507c1eebb435f079a0b3ca19ea635a77ebc3dbc24ffc8032d23e291cc36b03

  • C:\Users\Admin\AppData\Local\0abaa27e-0914-4839-8be3-ccc0b2b00c80\build2.exe

    MD5

    66bde9ddd0fb80ac7309176c23d03804

    SHA1

    45cd868973bac9c1808efdf19fd88dfd742cf7b4

    SHA256

    0a798e054fbe8545d4e1df781f3bb1a45b2fc58b5fb8d1c7383be8980aea829a

    SHA512

    65089ca60de87ee1557ac907bfac2f14d02ef55d3d687c9fb4b0628dcb35f32ae9507c1eebb435f079a0b3ca19ea635a77ebc3dbc24ffc8032d23e291cc36b03

  • C:\Users\Admin\AppData\Local\12c70348-b77f-447d-9aa3-93787848b807\a66ed6740deb55cd92216f556c7c15fdcf7697c7b4c70891fc0cad901da16d48.exe

    MD5

    57ea6784a0d59a7e9d28115727da7c47

    SHA1

    6d40f68df4ddd5cfd01fb70055736f1c87a73e1d

    SHA256

    a66ed6740deb55cd92216f556c7c15fdcf7697c7b4c70891fc0cad901da16d48

    SHA512

    e67ea92a6a32c6d0dadbb37a1c8d7e3689c457c4707cf5daf51c22c47b003a3026f631293035112b9c725467f7e704b454c1b7ca17d4dd4e78ba97a7c2624188

  • \ProgramData\mozglue.dll

    MD5

    8f73c08a9660691143661bf7332c3c27

    SHA1

    37fa65dd737c50fda710fdbde89e51374d0c204a

    SHA256

    3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

    SHA512

    0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

  • \ProgramData\nss3.dll

    MD5

    bfac4e3c5908856ba17d41edcd455a51

    SHA1

    8eec7e888767aa9e4cca8ff246eb2aacb9170428

    SHA256

    e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

    SHA512

    2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

  • memory/188-120-0x0000000000000000-mapping.dmp

  • memory/204-140-0x0000000000000000-mapping.dmp

  • memory/588-132-0x000000000046B76D-mapping.dmp

  • memory/588-135-0x0000000000400000-0x00000000004A1000-memory.dmp

    Filesize

    644KB

  • memory/588-131-0x0000000000400000-0x00000000004A1000-memory.dmp

    Filesize

    644KB

  • memory/2588-117-0x0000000000000000-mapping.dmp

  • memory/2612-119-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/2612-116-0x0000000000424141-mapping.dmp

  • memory/2612-114-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3116-128-0x0000000000000000-mapping.dmp

  • memory/3116-134-0x0000000002500000-0x000000000259E000-memory.dmp

    Filesize

    632KB

  • memory/3424-115-0x0000000004970000-0x0000000004A8B000-memory.dmp

    Filesize

    1.1MB

  • memory/3684-127-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3684-122-0x0000000000424141-mapping.dmp

  • memory/3856-139-0x0000000000000000-mapping.dmp

  • memory/4012-138-0x0000000000000000-mapping.dmp