Analysis

  • max time kernel
    185s
  • max time network
    174s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    25-06-2022 06:12

General

  • Target

    a6c9e5b7bac981bd1da33de2934dfad66ba32916effd52ad57a77b349984119b.exe

  • Size

    4.3MB

  • MD5

    13f3a3c79ceee161c26f0b6b81cb27fb

  • SHA1

    fa6823c3588f1b857a4b4adbcba0877be712dc5f

  • SHA256

    a6c9e5b7bac981bd1da33de2934dfad66ba32916effd52ad57a77b349984119b

  • SHA512

    efd0d198b6f70f41c02976f39ac9a02b207132a27903cccafb764dd99700aff5537ac75738c7d8ca7b4a37f4c3b4df3f959beef60b9b133132a72ccc55247b4c

Malware Config

Extracted

Family

vidar

Version

9.9

Botnet

231

C2

http://rapidbtcinvest.com/

Attributes
  • profile_id

    231

Signatures

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Vidar Stealer 1 IoCs
  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 10 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
  • 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 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • AutoIT Executable 4 IoCs

    AutoIT scripts compiled to PE executables.

  • Drops file in Program Files directory 5 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Program crash 1 IoCs
  • Checks processor information in registry 2 TTPs 4 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Creates scheduled task(s) 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 44 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a6c9e5b7bac981bd1da33de2934dfad66ba32916effd52ad57a77b349984119b.exe
    "C:\Users\Admin\AppData\Local\Temp\a6c9e5b7bac981bd1da33de2934dfad66ba32916effd52ad57a77b349984119b.exe"
    1⤵
    • Loads dropped DLL
    • Drops file in Program Files directory
    • Suspicious use of WriteProcessMemory
    PID:1716
    • C:\Program Files (x86)\LetsSee!\busshost.exe
      "C:\Program Files (x86)\LetsSee!\busshost.exe"
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:1192
    • C:\Program Files (x86)\LetsSee!\YTLoader.exe
      "C:\Program Files (x86)\LetsSee!\YTLoader.exe"
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Enumerates system info in registry
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2024
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 2024 -s 1164
        3⤵
        • Loads dropped DLL
        • Program crash
        PID:1632
    • C:\Program Files (x86)\LetsSee!\conf.exe
      "C:\Program Files (x86)\LetsSee!\conf.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:1784
      • C:\Users\Admin\AppData\Roaming\Microsoft\SystemCertificates\My\CTLs\7ZipArchiver\attachmentphoto.exe
        C:\Users\Admin\AppData\Roaming\Microsoft\SystemCertificates\My\CTLs\7ZipArchiver\attachmentphoto.exe
        3⤵
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:904
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /c SchTasks /create /SC MINUTE /TN 7ZipUnis /TR C:\Users\Admin\AppData\Roaming\Microsoft\SystemCertificates\My\CTLs\7ZipArchiver\volumfix.exe
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:916
          • C:\Windows\SysWOW64\schtasks.exe
            SchTasks /create /SC MINUTE /TN 7ZipUnis /TR C:\Users\Admin\AppData\Roaming\Microsoft\SystemCertificates\My\CTLs\7ZipArchiver\volumfix.exe
            5⤵
            • Creates scheduled task(s)
            PID:1916
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /c SchTasks /create /SC HOURLY /TN FlashServis /TR C:\ProgramData\FlashSys\CurlMSI.exe
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:920
          • C:\Windows\SysWOW64\schtasks.exe
            SchTasks /create /SC HOURLY /TN FlashServis /TR C:\ProgramData\FlashSys\CurlMSI.exe
            5⤵
            • Creates scheduled task(s)
            PID:1740
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k ping -n 2 localhost < nul & del /F /Q "C:\Program Files (x86)\LetsSee!\conf.exe"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:840
        • C:\Windows\SysWOW64\PING.EXE
          ping -n 2 localhost
          4⤵
          • Runs ping.exe
          PID:1960
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {6126F76D-FA1E-45F2-9D8D-6EA86FDD3456} S-1-5-21-1083475884-596052423-1669053738-1000:WYZSGDWS\Admin:Interactive:[1]
    1⤵
      PID:1804

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Execution

    Scheduled Task

    1
    T1053

    Persistence

    Scheduled Task

    1
    T1053

    Privilege Escalation

    Scheduled Task

    1
    T1053

    Credential Access

    Credentials in Files

    4
    T1081

    Discovery

    Query Registry

    3
    T1012

    System Information Discovery

    3
    T1082

    Remote System Discovery

    1
    T1018

    Collection

    Data from Local System

    4
    T1005

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Program Files (x86)\LetsSee!\YTLoader.exe
      Filesize

      3.0MB

      MD5

      adc9db2753fa3daa6a8156254ba2a5f1

      SHA1

      50ff27e2e1c4acc35768b93b73c03f7630027f04

      SHA256

      f8cc40321301d39f03eaa48d42cbbb2e953b694dc13ccf9d986032c621223fde

      SHA512

      5f7fca8da622035f3a83e562d727ccdd842d623ec376f93c75c3218bddd970c34a9efc66a33cfd6e52a398fa2ed090b890d05aecef53f65a22917d50d31a1195

    • C:\Program Files (x86)\LetsSee!\YTLoader.exe
      Filesize

      3.0MB

      MD5

      adc9db2753fa3daa6a8156254ba2a5f1

      SHA1

      50ff27e2e1c4acc35768b93b73c03f7630027f04

      SHA256

      f8cc40321301d39f03eaa48d42cbbb2e953b694dc13ccf9d986032c621223fde

      SHA512

      5f7fca8da622035f3a83e562d727ccdd842d623ec376f93c75c3218bddd970c34a9efc66a33cfd6e52a398fa2ed090b890d05aecef53f65a22917d50d31a1195

    • C:\Program Files (x86)\LetsSee!\busshost.exe
      Filesize

      913KB

      MD5

      11980d9f681e21c871299f8ffb17c659

      SHA1

      824946bf1bb2f50f7965e2507a290cc7572928cd

      SHA256

      365bac7f74df10e80149aca3ee2575b07486a1dd8f890afeb89769cf7a398e3d

      SHA512

      0439d63484fffa0b05cb81a27cd76ef893decc566dd005b9ac7172373888669f016db7c16bcf27fcabaa562d83aa1e1cfaa1e43abae219e36de7d9a181b8eed3

    • C:\Program Files (x86)\LetsSee!\conf.exe
      Filesize

      1.2MB

      MD5

      c1307d6c6a5bbba7e87dcd8749b2c68f

      SHA1

      991b4b0811c964be5c8c93db0f2f799990cec647

      SHA256

      22624092fda8c60b58a4444786cbdc7cc647bb4fd2e81b10f0a821727139c8b4

      SHA512

      3b27af8fa60865035a986af230bdea49df24bfdf162861f8d3c7924f9323b70a8a8abad3afd0d9a4f28128f7b93d047e1745c6de551bc5e43f36f63a08d25913

    • C:\Program Files (x86)\LetsSee!\conf.exe
      Filesize

      1.2MB

      MD5

      c1307d6c6a5bbba7e87dcd8749b2c68f

      SHA1

      991b4b0811c964be5c8c93db0f2f799990cec647

      SHA256

      22624092fda8c60b58a4444786cbdc7cc647bb4fd2e81b10f0a821727139c8b4

      SHA512

      3b27af8fa60865035a986af230bdea49df24bfdf162861f8d3c7924f9323b70a8a8abad3afd0d9a4f28128f7b93d047e1745c6de551bc5e43f36f63a08d25913

    • C:\Users\Admin\AppData\Roaming\Microsoft\Protect\cache.ini
      Filesize

      199B

      MD5

      3d68da5fd157231843a13667676de3f2

      SHA1

      206082eb56a40f38ba1e852ffcde4cd6e23cc338

      SHA256

      f5c9d294b9c805e38bebe17ac7150bf591df5b28f28db56dc2a1a9e609331759

      SHA512

      e136ed0cc3f47c52b439d72d39fcde3724852ec106e145c5e0dbb6d4d6e69209da7d160e3cc7c7ad51370230ffd4403477a65cd334cf71965473b847db0584a5

    • C:\Users\Admin\AppData\Roaming\Microsoft\SystemCertificates\My\CTLs\7ZipArchiver\attachmentphoto.exe
      Filesize

      1.2MB

      MD5

      c1307d6c6a5bbba7e87dcd8749b2c68f

      SHA1

      991b4b0811c964be5c8c93db0f2f799990cec647

      SHA256

      22624092fda8c60b58a4444786cbdc7cc647bb4fd2e81b10f0a821727139c8b4

      SHA512

      3b27af8fa60865035a986af230bdea49df24bfdf162861f8d3c7924f9323b70a8a8abad3afd0d9a4f28128f7b93d047e1745c6de551bc5e43f36f63a08d25913

    • C:\Users\Admin\AppData\Roaming\Microsoft\SystemCertificates\My\CTLs\7ZipArchiver\attachmentphoto.exe
      Filesize

      1.2MB

      MD5

      c1307d6c6a5bbba7e87dcd8749b2c68f

      SHA1

      991b4b0811c964be5c8c93db0f2f799990cec647

      SHA256

      22624092fda8c60b58a4444786cbdc7cc647bb4fd2e81b10f0a821727139c8b4

      SHA512

      3b27af8fa60865035a986af230bdea49df24bfdf162861f8d3c7924f9323b70a8a8abad3afd0d9a4f28128f7b93d047e1745c6de551bc5e43f36f63a08d25913

    • \Program Files (x86)\LetsSee!\YTLoader.exe
      Filesize

      3.0MB

      MD5

      adc9db2753fa3daa6a8156254ba2a5f1

      SHA1

      50ff27e2e1c4acc35768b93b73c03f7630027f04

      SHA256

      f8cc40321301d39f03eaa48d42cbbb2e953b694dc13ccf9d986032c621223fde

      SHA512

      5f7fca8da622035f3a83e562d727ccdd842d623ec376f93c75c3218bddd970c34a9efc66a33cfd6e52a398fa2ed090b890d05aecef53f65a22917d50d31a1195

    • \Program Files (x86)\LetsSee!\YTLoader.exe
      Filesize

      3.0MB

      MD5

      adc9db2753fa3daa6a8156254ba2a5f1

      SHA1

      50ff27e2e1c4acc35768b93b73c03f7630027f04

      SHA256

      f8cc40321301d39f03eaa48d42cbbb2e953b694dc13ccf9d986032c621223fde

      SHA512

      5f7fca8da622035f3a83e562d727ccdd842d623ec376f93c75c3218bddd970c34a9efc66a33cfd6e52a398fa2ed090b890d05aecef53f65a22917d50d31a1195

    • \Program Files (x86)\LetsSee!\YTLoader.exe
      Filesize

      3.0MB

      MD5

      adc9db2753fa3daa6a8156254ba2a5f1

      SHA1

      50ff27e2e1c4acc35768b93b73c03f7630027f04

      SHA256

      f8cc40321301d39f03eaa48d42cbbb2e953b694dc13ccf9d986032c621223fde

      SHA512

      5f7fca8da622035f3a83e562d727ccdd842d623ec376f93c75c3218bddd970c34a9efc66a33cfd6e52a398fa2ed090b890d05aecef53f65a22917d50d31a1195

    • \Program Files (x86)\LetsSee!\YTLoader.exe
      Filesize

      3.0MB

      MD5

      adc9db2753fa3daa6a8156254ba2a5f1

      SHA1

      50ff27e2e1c4acc35768b93b73c03f7630027f04

      SHA256

      f8cc40321301d39f03eaa48d42cbbb2e953b694dc13ccf9d986032c621223fde

      SHA512

      5f7fca8da622035f3a83e562d727ccdd842d623ec376f93c75c3218bddd970c34a9efc66a33cfd6e52a398fa2ed090b890d05aecef53f65a22917d50d31a1195

    • \Program Files (x86)\LetsSee!\YTLoader.exe
      Filesize

      3.0MB

      MD5

      adc9db2753fa3daa6a8156254ba2a5f1

      SHA1

      50ff27e2e1c4acc35768b93b73c03f7630027f04

      SHA256

      f8cc40321301d39f03eaa48d42cbbb2e953b694dc13ccf9d986032c621223fde

      SHA512

      5f7fca8da622035f3a83e562d727ccdd842d623ec376f93c75c3218bddd970c34a9efc66a33cfd6e52a398fa2ed090b890d05aecef53f65a22917d50d31a1195

    • \Program Files (x86)\LetsSee!\YTLoader.exe
      Filesize

      3.0MB

      MD5

      adc9db2753fa3daa6a8156254ba2a5f1

      SHA1

      50ff27e2e1c4acc35768b93b73c03f7630027f04

      SHA256

      f8cc40321301d39f03eaa48d42cbbb2e953b694dc13ccf9d986032c621223fde

      SHA512

      5f7fca8da622035f3a83e562d727ccdd842d623ec376f93c75c3218bddd970c34a9efc66a33cfd6e52a398fa2ed090b890d05aecef53f65a22917d50d31a1195

    • \Program Files (x86)\LetsSee!\busshost.exe
      Filesize

      913KB

      MD5

      11980d9f681e21c871299f8ffb17c659

      SHA1

      824946bf1bb2f50f7965e2507a290cc7572928cd

      SHA256

      365bac7f74df10e80149aca3ee2575b07486a1dd8f890afeb89769cf7a398e3d

      SHA512

      0439d63484fffa0b05cb81a27cd76ef893decc566dd005b9ac7172373888669f016db7c16bcf27fcabaa562d83aa1e1cfaa1e43abae219e36de7d9a181b8eed3

    • \Program Files (x86)\LetsSee!\busshost.exe
      Filesize

      913KB

      MD5

      11980d9f681e21c871299f8ffb17c659

      SHA1

      824946bf1bb2f50f7965e2507a290cc7572928cd

      SHA256

      365bac7f74df10e80149aca3ee2575b07486a1dd8f890afeb89769cf7a398e3d

      SHA512

      0439d63484fffa0b05cb81a27cd76ef893decc566dd005b9ac7172373888669f016db7c16bcf27fcabaa562d83aa1e1cfaa1e43abae219e36de7d9a181b8eed3

    • \Program Files (x86)\LetsSee!\conf.exe
      Filesize

      1.2MB

      MD5

      c1307d6c6a5bbba7e87dcd8749b2c68f

      SHA1

      991b4b0811c964be5c8c93db0f2f799990cec647

      SHA256

      22624092fda8c60b58a4444786cbdc7cc647bb4fd2e81b10f0a821727139c8b4

      SHA512

      3b27af8fa60865035a986af230bdea49df24bfdf162861f8d3c7924f9323b70a8a8abad3afd0d9a4f28128f7b93d047e1745c6de551bc5e43f36f63a08d25913

    • \Users\Admin\AppData\Roaming\Microsoft\SystemCertificates\My\CTLs\7ZipArchiver\attachmentphoto.exe
      Filesize

      1.2MB

      MD5

      c1307d6c6a5bbba7e87dcd8749b2c68f

      SHA1

      991b4b0811c964be5c8c93db0f2f799990cec647

      SHA256

      22624092fda8c60b58a4444786cbdc7cc647bb4fd2e81b10f0a821727139c8b4

      SHA512

      3b27af8fa60865035a986af230bdea49df24bfdf162861f8d3c7924f9323b70a8a8abad3afd0d9a4f28128f7b93d047e1745c6de551bc5e43f36f63a08d25913

    • memory/840-79-0x0000000000000000-mapping.dmp
    • memory/904-105-0x0000000000400000-0x0000000000592000-memory.dmp
      Filesize

      1.6MB

    • memory/904-104-0x0000000001E00000-0x0000000001E93000-memory.dmp
      Filesize

      588KB

    • memory/904-98-0x0000000001E00000-0x0000000001EC3000-memory.dmp
      Filesize

      780KB

    • memory/904-77-0x0000000000000000-mapping.dmp
    • memory/904-109-0x0000000000400000-0x0000000000592000-memory.dmp
      Filesize

      1.6MB

    • memory/916-102-0x0000000000000000-mapping.dmp
    • memory/920-103-0x0000000000000000-mapping.dmp
    • memory/1192-69-0x00000000005B0000-0x00000000006B0000-memory.dmp
      Filesize

      1024KB

    • memory/1192-57-0x0000000000000000-mapping.dmp
    • memory/1192-74-0x0000000000400000-0x0000000000537000-memory.dmp
      Filesize

      1.2MB

    • memory/1192-106-0x00000000005B0000-0x00000000006B0000-memory.dmp
      Filesize

      1024KB

    • memory/1632-110-0x0000000000000000-mapping.dmp
    • memory/1716-54-0x0000000075781000-0x0000000075783000-memory.dmp
      Filesize

      8KB

    • memory/1740-108-0x0000000000000000-mapping.dmp
    • memory/1784-68-0x0000000001DF0000-0x0000000001EB3000-memory.dmp
      Filesize

      780KB

    • memory/1784-70-0x0000000001DF0000-0x0000000001E83000-memory.dmp
      Filesize

      588KB

    • memory/1784-81-0x0000000000400000-0x0000000000592000-memory.dmp
      Filesize

      1.6MB

    • memory/1784-64-0x0000000000000000-mapping.dmp
    • memory/1784-75-0x0000000000400000-0x0000000000592000-memory.dmp
      Filesize

      1.6MB

    • memory/1784-80-0x0000000001DF0000-0x0000000001E83000-memory.dmp
      Filesize

      588KB

    • memory/1916-107-0x0000000000000000-mapping.dmp
    • memory/1960-82-0x0000000000000000-mapping.dmp
    • memory/2024-92-0x00000000006F0000-0x00000000006F8000-memory.dmp
      Filesize

      32KB

    • memory/2024-94-0x0000000000710000-0x0000000000718000-memory.dmp
      Filesize

      32KB

    • memory/2024-97-0x0000000000750000-0x0000000000758000-memory.dmp
      Filesize

      32KB

    • memory/2024-96-0x0000000000740000-0x0000000000748000-memory.dmp
      Filesize

      32KB

    • memory/2024-85-0x00000000052F0000-0x000000000574A000-memory.dmp
      Filesize

      4.4MB

    • memory/2024-73-0x0000000001390000-0x0000000001698000-memory.dmp
      Filesize

      3.0MB

    • memory/2024-83-0x0000000000220000-0x000000000022A000-memory.dmp
      Filesize

      40KB

    • memory/2024-93-0x0000000000700000-0x0000000000708000-memory.dmp
      Filesize

      32KB

    • memory/2024-95-0x0000000000720000-0x0000000000728000-memory.dmp
      Filesize

      32KB

    • memory/2024-91-0x00000000006E0000-0x00000000006EE000-memory.dmp
      Filesize

      56KB

    • memory/2024-90-0x0000000000590000-0x0000000000598000-memory.dmp
      Filesize

      32KB

    • memory/2024-89-0x0000000000580000-0x000000000058A000-memory.dmp
      Filesize

      40KB

    • memory/2024-88-0x0000000000560000-0x000000000056A000-memory.dmp
      Filesize

      40KB

    • memory/2024-87-0x0000000000550000-0x000000000055A000-memory.dmp
      Filesize

      40KB

    • memory/2024-60-0x0000000000000000-mapping.dmp
    • memory/2024-86-0x0000000000540000-0x0000000000550000-memory.dmp
      Filesize

      64KB