Analysis

  • max time kernel
    37s
  • max time network
    176s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    22-07-2021 09:06

General

  • Target

    38911964dcd075508c459254ad27517d.exe

  • Size

    771KB

  • MD5

    38911964dcd075508c459254ad27517d

  • SHA1

    22c468c8d5efd3a5950ff1b28dbfa47b0a42f842

  • SHA256

    efd055ee7d3d09c7211dd6aceef64f42ff62d01edf0105d06d77d0b92411bedc

  • SHA512

    8e5cce82d2e222bf1fef8027533a17564041206d29611192cfe65c2a194a2bf8aa0be4d9414672a4361b43ec091d070267df6d806b932d96a9c2a6e292740971

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 6 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 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 55 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\38911964dcd075508c459254ad27517d.exe
    "C:\Users\Admin\AppData\Local\Temp\38911964dcd075508c459254ad27517d.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1208
    • C:\Users\Admin\AppData\Local\Temp\38911964dcd075508c459254ad27517d.exe
      "C:\Users\Admin\AppData\Local\Temp\38911964dcd075508c459254ad27517d.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1224
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\474b0f51-7b89-432d-8328-9d2e2600d6da" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:708
      • C:\Users\Admin\AppData\Local\Temp\38911964dcd075508c459254ad27517d.exe
        "C:\Users\Admin\AppData\Local\Temp\38911964dcd075508c459254ad27517d.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1312
        • C:\Users\Admin\AppData\Local\Temp\38911964dcd075508c459254ad27517d.exe
          "C:\Users\Admin\AppData\Local\Temp\38911964dcd075508c459254ad27517d.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Loads dropped DLL
          • Modifies system certificate store
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:1840
          • C:\Users\Admin\AppData\Local\98cf2bcf-fcfa-4388-85d0-a2983d681928\build2.exe
            "C:\Users\Admin\AppData\Local\98cf2bcf-fcfa-4388-85d0-a2983d681928\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:1100
            • C:\Users\Admin\AppData\Local\98cf2bcf-fcfa-4388-85d0-a2983d681928\build2.exe
              "C:\Users\Admin\AppData\Local\98cf2bcf-fcfa-4388-85d0-a2983d681928\build2.exe"
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Checks processor information in registry
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of WriteProcessMemory
              PID:920
              • 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\98cf2bcf-fcfa-4388-85d0-a2983d681928\build2.exe" & del C:\ProgramData\*.dll & exit
                7⤵
                • Suspicious use of WriteProcessMemory
                PID:472
                • C:\Windows\SysWOW64\taskkill.exe
                  taskkill /im build2.exe /f
                  8⤵
                  • Kills process with taskkill
                  • Suspicious use of AdjustPrivilegeToken
                  PID:1972
                • C:\Windows\SysWOW64\timeout.exe
                  timeout /t 6
                  8⤵
                  • Delays execution with timeout.exe
                  PID:1152

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

    12f9f4ed75c06441662a76909ee926fa

    SHA1

    e63cd517f59bad52bb18f6194bc16e35c801d66b

    SHA256

    a087b8dbd6fd00df49729b93bc2545e8b67b15df7fd01744adf7c7a70ec1c714

    SHA512

    e11879a36cd44500180ce7217771682723e2ebe4b16f2ba1f0610480db0e742f01f780feb7bc41c2d46413be4fa052dbc6b121bedb84ea4ea2005b9e3c044a12

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
    MD5

    2902de11e30dcc620b184e3bb0f0c1cb

    SHA1

    5d11d14a2558801a2688dc2d6dfad39ac294f222

    SHA256

    e6a7f1f8810e46a736e80ee5ac6187690f28f4d5d35d130d410e20084b2c1544

    SHA512

    efd415cde25b827ac2a7ca4d6486ce3a43cdcc1c31d3a94fd7944681aa3e83a4966625bf2e6770581c4b59d05e35ff9318d9adaddade9070f131076892af2fa0

  • 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

    dde5ec51f7264acea59061b4fa5eb669

    SHA1

    ae09f5477fec6ea0936b974df282fe7e716f7cf5

    SHA256

    a19731cdd1bdd32ddd21fdf1123052b4ed8bb866e15c0c1359f7a1e3bea74dce

    SHA512

    2b0d4b7b213ad933e17edc0d8042256fb17b8ed86caf5c47ea1058d2325569383ba723291affcccfa230caaa372086c105578ff757d6ad0fd809cb8021716026

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
    MD5

    b05b9f46715ee7fb36e87d9d9c6a926e

    SHA1

    73515bd949938fd9d8ae866693a5472aa771c52d

    SHA256

    e2632a9f0c55e905b473bf2349a924516be8a0aeef0300db238be9253c9b55c8

    SHA512

    609822206e480447629164bafcf46bd9e5f6d9a648f5ed7d3648fc084deb373427c7aa9f4b1251c90ae900ef280b5ae7a136fcb7adc1be3e0512025e92fb4607

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

    c8412e48961e978b404caeae856c0f95

    SHA1

    77a4a9bcc5e61d4c5515e308e94f4e7f1c27efb1

    SHA256

    226aa306c7de2d1334c8a29624288b8f46d656bcbfd5e8dd562b0dfab1dc12f4

    SHA512

    4d412db77b571edcae16da6d8921140364d1ab67377957feef3c6a5b1712b5b636dc1f3eb1079b2b544c5fa94246989e475217bbafa58f8ee19c494dfe634b80

  • C:\Users\Admin\AppData\Local\474b0f51-7b89-432d-8328-9d2e2600d6da\38911964dcd075508c459254ad27517d.exe
    MD5

    38911964dcd075508c459254ad27517d

    SHA1

    22c468c8d5efd3a5950ff1b28dbfa47b0a42f842

    SHA256

    efd055ee7d3d09c7211dd6aceef64f42ff62d01edf0105d06d77d0b92411bedc

    SHA512

    8e5cce82d2e222bf1fef8027533a17564041206d29611192cfe65c2a194a2bf8aa0be4d9414672a4361b43ec091d070267df6d806b932d96a9c2a6e292740971

  • C:\Users\Admin\AppData\Local\98cf2bcf-fcfa-4388-85d0-a2983d681928\build2.exe
    MD5

    66bde9ddd0fb80ac7309176c23d03804

    SHA1

    45cd868973bac9c1808efdf19fd88dfd742cf7b4

    SHA256

    0a798e054fbe8545d4e1df781f3bb1a45b2fc58b5fb8d1c7383be8980aea829a

    SHA512

    65089ca60de87ee1557ac907bfac2f14d02ef55d3d687c9fb4b0628dcb35f32ae9507c1eebb435f079a0b3ca19ea635a77ebc3dbc24ffc8032d23e291cc36b03

  • C:\Users\Admin\AppData\Local\98cf2bcf-fcfa-4388-85d0-a2983d681928\build2.exe
    MD5

    66bde9ddd0fb80ac7309176c23d03804

    SHA1

    45cd868973bac9c1808efdf19fd88dfd742cf7b4

    SHA256

    0a798e054fbe8545d4e1df781f3bb1a45b2fc58b5fb8d1c7383be8980aea829a

    SHA512

    65089ca60de87ee1557ac907bfac2f14d02ef55d3d687c9fb4b0628dcb35f32ae9507c1eebb435f079a0b3ca19ea635a77ebc3dbc24ffc8032d23e291cc36b03

  • C:\Users\Admin\AppData\Local\98cf2bcf-fcfa-4388-85d0-a2983d681928\build2.exe
    MD5

    66bde9ddd0fb80ac7309176c23d03804

    SHA1

    45cd868973bac9c1808efdf19fd88dfd742cf7b4

    SHA256

    0a798e054fbe8545d4e1df781f3bb1a45b2fc58b5fb8d1c7383be8980aea829a

    SHA512

    65089ca60de87ee1557ac907bfac2f14d02ef55d3d687c9fb4b0628dcb35f32ae9507c1eebb435f079a0b3ca19ea635a77ebc3dbc24ffc8032d23e291cc36b03

  • \ProgramData\mozglue.dll
    MD5

    8f73c08a9660691143661bf7332c3c27

    SHA1

    37fa65dd737c50fda710fdbde89e51374d0c204a

    SHA256

    3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

    SHA512

    0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

  • \ProgramData\msvcp140.dll
    MD5

    109f0f02fd37c84bfc7508d4227d7ed5

    SHA1

    ef7420141bb15ac334d3964082361a460bfdb975

    SHA256

    334e69ac9367f708ce601a6f490ff227d6c20636da5222f148b25831d22e13d4

    SHA512

    46eb62b65817365c249b48863d894b4669e20fcb3992e747cd5c9fdd57968e1b2cf7418d1c9340a89865eadda362b8db51947eb4427412eb83b35994f932fd39

  • \ProgramData\nss3.dll
    MD5

    bfac4e3c5908856ba17d41edcd455a51

    SHA1

    8eec7e888767aa9e4cca8ff246eb2aacb9170428

    SHA256

    e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

    SHA512

    2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

  • \ProgramData\vcruntime140.dll
    MD5

    7587bf9cb4147022cd5681b015183046

    SHA1

    f2106306a8f6f0da5afb7fc765cfa0757ad5a628

    SHA256

    c40bb03199a2054dabfc7a8e01d6098e91de7193619effbd0f142a7bf031c14d

    SHA512

    0b63e4979846ceba1b1ed8470432ea6aa18cca66b5f5322d17b14bc0dfa4b2ee09ca300a016e16a01db5123e4e022820698f46d9bad1078bd24675b4b181e91f

  • \Users\Admin\AppData\Local\98cf2bcf-fcfa-4388-85d0-a2983d681928\build2.exe
    MD5

    66bde9ddd0fb80ac7309176c23d03804

    SHA1

    45cd868973bac9c1808efdf19fd88dfd742cf7b4

    SHA256

    0a798e054fbe8545d4e1df781f3bb1a45b2fc58b5fb8d1c7383be8980aea829a

    SHA512

    65089ca60de87ee1557ac907bfac2f14d02ef55d3d687c9fb4b0628dcb35f32ae9507c1eebb435f079a0b3ca19ea635a77ebc3dbc24ffc8032d23e291cc36b03

  • \Users\Admin\AppData\Local\98cf2bcf-fcfa-4388-85d0-a2983d681928\build2.exe
    MD5

    66bde9ddd0fb80ac7309176c23d03804

    SHA1

    45cd868973bac9c1808efdf19fd88dfd742cf7b4

    SHA256

    0a798e054fbe8545d4e1df781f3bb1a45b2fc58b5fb8d1c7383be8980aea829a

    SHA512

    65089ca60de87ee1557ac907bfac2f14d02ef55d3d687c9fb4b0628dcb35f32ae9507c1eebb435f079a0b3ca19ea635a77ebc3dbc24ffc8032d23e291cc36b03

  • memory/472-92-0x0000000000000000-mapping.dmp
  • memory/708-64-0x0000000000000000-mapping.dmp
  • memory/920-82-0x0000000000400000-0x00000000004A1000-memory.dmp
    Filesize

    644KB

  • memory/920-83-0x000000000046B76D-mapping.dmp
  • memory/920-87-0x0000000000400000-0x00000000004A1000-memory.dmp
    Filesize

    644KB

  • memory/1100-79-0x0000000000000000-mapping.dmp
  • memory/1100-86-0x00000000002F0000-0x000000000038E000-memory.dmp
    Filesize

    632KB

  • memory/1152-94-0x0000000000000000-mapping.dmp
  • memory/1208-62-0x0000000002DD0000-0x0000000002EEB000-memory.dmp
    Filesize

    1.1MB

  • memory/1224-59-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/1224-63-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/1224-61-0x0000000076661000-0x0000000076663000-memory.dmp
    Filesize

    8KB

  • memory/1224-60-0x0000000000424141-mapping.dmp
  • memory/1312-66-0x0000000000000000-mapping.dmp
  • memory/1840-68-0x0000000000424141-mapping.dmp
  • memory/1840-76-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/1972-93-0x0000000000000000-mapping.dmp