Analysis

  • max time kernel
    68s
  • max time network
    138s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    22-07-2021 08:24

General

  • Target

    477ce9ba18954fcc3f713534045423f42f45c693607207bc47775ffa6ecb3107.exe

  • Size

    718KB

  • MD5

    a54ace3d56d2608617113615dd514ecf

  • SHA1

    a57095e709a7218398f1d9fa40d4d8f4e1a77881

  • SHA256

    477ce9ba18954fcc3f713534045423f42f45c693607207bc47775ffa6ecb3107

  • SHA512

    5e434eb95f52bd5fd34d6de1087167a752f995b0f8f8d54c1a99d3e7ec0078dff0dcf351dd760dd3f6aa233bd7d74929e5e667d1972e9878d164088cec8213a9

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\477ce9ba18954fcc3f713534045423f42f45c693607207bc47775ffa6ecb3107.exe
    "C:\Users\Admin\AppData\Local\Temp\477ce9ba18954fcc3f713534045423f42f45c693607207bc47775ffa6ecb3107.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:664
    • C:\Users\Admin\AppData\Local\Temp\477ce9ba18954fcc3f713534045423f42f45c693607207bc47775ffa6ecb3107.exe
      "C:\Users\Admin\AppData\Local\Temp\477ce9ba18954fcc3f713534045423f42f45c693607207bc47775ffa6ecb3107.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2264
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\5976f4ae-67b6-4dd8-a4b8-27e1d26d8137" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:420
      • C:\Users\Admin\AppData\Local\Temp\477ce9ba18954fcc3f713534045423f42f45c693607207bc47775ffa6ecb3107.exe
        "C:\Users\Admin\AppData\Local\Temp\477ce9ba18954fcc3f713534045423f42f45c693607207bc47775ffa6ecb3107.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:196
        • C:\Users\Admin\AppData\Local\Temp\477ce9ba18954fcc3f713534045423f42f45c693607207bc47775ffa6ecb3107.exe
          "C:\Users\Admin\AppData\Local\Temp\477ce9ba18954fcc3f713534045423f42f45c693607207bc47775ffa6ecb3107.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:2116
          • C:\Users\Admin\AppData\Local\fce36ea1-734b-4e1e-bdb8-085b9dae20e7\build2.exe
            "C:\Users\Admin\AppData\Local\fce36ea1-734b-4e1e-bdb8-085b9dae20e7\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:3424
            • C:\Users\Admin\AppData\Local\fce36ea1-734b-4e1e-bdb8-085b9dae20e7\build2.exe
              "C:\Users\Admin\AppData\Local\fce36ea1-734b-4e1e-bdb8-085b9dae20e7\build2.exe"
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Checks processor information in registry
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of WriteProcessMemory
              PID:3848
              • 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\fce36ea1-734b-4e1e-bdb8-085b9dae20e7\build2.exe" & del C:\ProgramData\*.dll & exit
                7⤵
                • Suspicious use of WriteProcessMemory
                PID:3828
                • C:\Windows\SysWOW64\taskkill.exe
                  taskkill /im build2.exe /f
                  8⤵
                  • Kills process with taskkill
                  • Suspicious use of AdjustPrivilegeToken
                  PID:408
                • C:\Windows\SysWOW64\timeout.exe
                  timeout /t 6
                  8⤵
                  • Delays execution with timeout.exe
                  PID:4016

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\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
    MD5

    aef6170147fedcea68415eb22f958d71

    SHA1

    3b7a51f810c9c18a557d3ab3cad0b90b8657d0ee

    SHA256

    bb2a64e07a2c7fa817c7d1674d4a4fa9d4ac75cadf600b3db895be4bbac041e9

    SHA512

    3f1f168fc71b0dc4d67329201962446452202cc22145f38c9c84895f4064a330212cebce4cbdd51588803b39e23e1a5a10bd88058a47556b55518894fc6e878f

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

    03677779f180915768cbc130700c7645

    SHA1

    c09543e8544e2345fd3fa8f8344cfd90cd424f60

    SHA256

    b23924014aa79e5cf9995d79fdd2c1ac95f86cb72f04d8382ce2656f27a4b13c

    SHA512

    b6be8a121a0781a83ba16be958ace38be7db908444f269f0ff14aa456471610a35e56d0b55bc9f6e946c61f710998ee4706fe07f103668b642cd6b567028398e

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

    7f7315b48f0f67d9c20ad92a8f27eb6f

    SHA1

    749cd6f285316faecccef17c7b9347490c90be9c

    SHA256

    5269336afe9a28e5c55421f52f167924cbb04651fd2123c477a6143c2d373603

    SHA512

    40c9b76dc099710975824bc8b72eb6384da919819fc0866954124bcc5229ed0c7cb489867799783e66ca0dfeb71cce4b7339a8be71d988b009fb9acea93e8609

  • C:\Users\Admin\AppData\Local\5976f4ae-67b6-4dd8-a4b8-27e1d26d8137\477ce9ba18954fcc3f713534045423f42f45c693607207bc47775ffa6ecb3107.exe
    MD5

    a54ace3d56d2608617113615dd514ecf

    SHA1

    a57095e709a7218398f1d9fa40d4d8f4e1a77881

    SHA256

    477ce9ba18954fcc3f713534045423f42f45c693607207bc47775ffa6ecb3107

    SHA512

    5e434eb95f52bd5fd34d6de1087167a752f995b0f8f8d54c1a99d3e7ec0078dff0dcf351dd760dd3f6aa233bd7d74929e5e667d1972e9878d164088cec8213a9

  • C:\Users\Admin\AppData\Local\fce36ea1-734b-4e1e-bdb8-085b9dae20e7\build2.exe
    MD5

    66bde9ddd0fb80ac7309176c23d03804

    SHA1

    45cd868973bac9c1808efdf19fd88dfd742cf7b4

    SHA256

    0a798e054fbe8545d4e1df781f3bb1a45b2fc58b5fb8d1c7383be8980aea829a

    SHA512

    65089ca60de87ee1557ac907bfac2f14d02ef55d3d687c9fb4b0628dcb35f32ae9507c1eebb435f079a0b3ca19ea635a77ebc3dbc24ffc8032d23e291cc36b03

  • C:\Users\Admin\AppData\Local\fce36ea1-734b-4e1e-bdb8-085b9dae20e7\build2.exe
    MD5

    66bde9ddd0fb80ac7309176c23d03804

    SHA1

    45cd868973bac9c1808efdf19fd88dfd742cf7b4

    SHA256

    0a798e054fbe8545d4e1df781f3bb1a45b2fc58b5fb8d1c7383be8980aea829a

    SHA512

    65089ca60de87ee1557ac907bfac2f14d02ef55d3d687c9fb4b0628dcb35f32ae9507c1eebb435f079a0b3ca19ea635a77ebc3dbc24ffc8032d23e291cc36b03

  • C:\Users\Admin\AppData\Local\fce36ea1-734b-4e1e-bdb8-085b9dae20e7\build2.exe
    MD5

    66bde9ddd0fb80ac7309176c23d03804

    SHA1

    45cd868973bac9c1808efdf19fd88dfd742cf7b4

    SHA256

    0a798e054fbe8545d4e1df781f3bb1a45b2fc58b5fb8d1c7383be8980aea829a

    SHA512

    65089ca60de87ee1557ac907bfac2f14d02ef55d3d687c9fb4b0628dcb35f32ae9507c1eebb435f079a0b3ca19ea635a77ebc3dbc24ffc8032d23e291cc36b03

  • \ProgramData\mozglue.dll
    MD5

    8f73c08a9660691143661bf7332c3c27

    SHA1

    37fa65dd737c50fda710fdbde89e51374d0c204a

    SHA256

    3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

    SHA512

    0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

  • \ProgramData\nss3.dll
    MD5

    bfac4e3c5908856ba17d41edcd455a51

    SHA1

    8eec7e888767aa9e4cca8ff246eb2aacb9170428

    SHA256

    e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

    SHA512

    2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

  • memory/196-120-0x0000000000000000-mapping.dmp
  • memory/408-139-0x0000000000000000-mapping.dmp
  • memory/420-118-0x0000000000000000-mapping.dmp
  • memory/664-114-0x0000000004AC0000-0x0000000004BDB000-memory.dmp
    Filesize

    1.1MB

  • memory/2116-122-0x0000000000424141-mapping.dmp
  • memory/2116-127-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2264-117-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2264-116-0x0000000000424141-mapping.dmp
  • memory/2264-115-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/3424-128-0x0000000000000000-mapping.dmp
  • memory/3424-134-0x0000000002700000-0x000000000279E000-memory.dmp
    Filesize

    632KB

  • memory/3828-138-0x0000000000000000-mapping.dmp
  • memory/3848-131-0x0000000000400000-0x00000000004A1000-memory.dmp
    Filesize

    644KB

  • memory/3848-135-0x0000000000400000-0x00000000004A1000-memory.dmp
    Filesize

    644KB

  • memory/3848-132-0x000000000046B76D-mapping.dmp
  • memory/4016-140-0x0000000000000000-mapping.dmp