Analysis

  • max time kernel
    150s
  • max time network
    141s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    11-05-2021 13:46

General

  • Target

    d9ac8cb2cac5a0eb7a96d928cb3c384c747813eed62e5acbcc58989341d4b742.exe

  • Size

    1.6MB

  • MD5

    2b8c9b2b7c5a2700f69abaaaae527c40

  • SHA1

    fa0deb5fb3a10c75538edf79a79aeff532ed7bc5

  • SHA256

    d9ac8cb2cac5a0eb7a96d928cb3c384c747813eed62e5acbcc58989341d4b742

  • SHA512

    310acbe057d2efe25265712b3a60db46ea32a68775b3857e712dccf2cd89afe3df78e7b90a123de262927a09a8d2f28a17f590be7ed658e0487851c2eda3421b

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 2 IoCs
  • Modifies visibility of file extensions in Explorer 2 TTPs
  • UAC bypass 3 TTPs
  • Executes dropped EXE 4 IoCs
  • Modifies extensions of user files 1 IoCs

    Ransomware generally changes the extension on encrypted files.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Loads dropped DLL 17 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Adds Run key to start application 2 TTPs 5 IoCs
  • Drops file in System32 directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry key 1 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of FindShellTrayWindow 64 IoCs
  • Suspicious use of WriteProcessMemory 31 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d9ac8cb2cac5a0eb7a96d928cb3c384c747813eed62e5acbcc58989341d4b742.exe
    "C:\Users\Admin\AppData\Local\Temp\d9ac8cb2cac5a0eb7a96d928cb3c384c747813eed62e5acbcc58989341d4b742.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Loads dropped DLL
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:788
    • C:\Users\Admin\oYckQIUU\hQIUUIMI.exe
      "C:\Users\Admin\oYckQIUU\hQIUUIMI.exe"
      2⤵
      • Executes dropped EXE
      • Modifies extensions of user files
      • Checks computer location settings
      • Loads dropped DLL
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of FindShellTrayWindow
      PID:1108
    • C:\ProgramData\YCMsQscA\jIUEQwYA.exe
      "C:\ProgramData\YCMsQscA\jIUEQwYA.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      PID:1732
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c C:\Users\Admin\AppData\Local\Temp\setup.exe
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:876
      • C:\Users\Admin\AppData\Local\Temp\setup.exe
        C:\Users\Admin\AppData\Local\Temp\setup.exe
        3⤵
        • Executes dropped EXE
        PID:376
    • C:\Windows\SysWOW64\reg.exe
      reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced /f /v HideFileExt /t REG_DWORD /d 1
      2⤵
      • Modifies registry key
      PID:320
    • C:\Windows\SysWOW64\reg.exe
      reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced /f /v Hidden /t REG_DWORD /d 2
      2⤵
      • Modifies registry key
      PID:1452
    • C:\Windows\SysWOW64\reg.exe
      reg add HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /d 0 /t REG_DWORD /f
      2⤵
      • Modifies registry key
      PID:1448
  • C:\ProgramData\sMkAskEE\vIEwQcEg.exe
    C:\ProgramData\sMkAskEE\vIEwQcEg.exe
    1⤵
    • Executes dropped EXE
    • Adds Run key to start application
    • Drops file in System32 directory
    PID:828

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Winlogon Helper DLL

1
T1004

Hidden Files and Directories

1
T1158

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

Bypass User Account Control

1
T1088

Defense Evasion

Modify Registry

5
T1112

Hidden Files and Directories

1
T1158

Bypass User Account Control

1
T1088

Disabling Security Tools

1
T1089

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

1
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\YCMsQscA\jIUEQwYA.exe
    MD5

    af3e22e414fbfd87d68ac7a07aa30dd1

    SHA1

    dd9d95be5bae9105e6e91e5c1cd3e2d124948cd4

    SHA256

    bc7203dc7ba35973ee5a2e2e9b7fc787425657a1d17db8c9af051d4fa36a02fd

    SHA512

    f1db3a0e439aa023a71b88d2f1bb2e7f9f1e5b22dde2678b056d731c667b5ae8e54a53276cd385858d9563a10f5665b84ceb9a2f87e847d5b7f2ba3eb8e35966

  • C:\ProgramData\sMkAskEE\vIEwQcEg.exe
    MD5

    d15a2fb2cba7d76d91a79abc8d427af1

    SHA1

    8f0f0e56545708983d6fe09942cd135daedf7601

    SHA256

    8b8181cbd6b3735f62ab1d05c3f410cb85a6b590a6e2d63d2569b297626ea24c

    SHA512

    dff8095cc33476274990c458baea83324a38b906a66c86d647f8f41ffd1e2172693734e6d80368ebb471b4fa269f0c7a0ade3a596d40554d7d9e59e4e942ef9a

  • C:\Users\Admin\AppData\Local\Temp\setup.exe
    MD5

    4d92f518527353c0db88a70fddcfd390

    SHA1

    c4baffc19e7d1f0e0ebf73bab86a491c1d152f98

    SHA256

    97e6f3fc1a9163f10b6502509d55bf75ee893967fb35f318954797e8ab4d4d9c

    SHA512

    05a8136ccc45ef73cd5c70ee0ef204d9d2b48b950e938494b6d1a61dfba37527c9600382321d1c031dc74e4cf3e16f001ae0f8cd64d76d765f5509ce8dc76452

  • C:\Users\Admin\AppData\Local\Temp\setup.exe
    MD5

    4d92f518527353c0db88a70fddcfd390

    SHA1

    c4baffc19e7d1f0e0ebf73bab86a491c1d152f98

    SHA256

    97e6f3fc1a9163f10b6502509d55bf75ee893967fb35f318954797e8ab4d4d9c

    SHA512

    05a8136ccc45ef73cd5c70ee0ef204d9d2b48b950e938494b6d1a61dfba37527c9600382321d1c031dc74e4cf3e16f001ae0f8cd64d76d765f5509ce8dc76452

  • C:\Users\Admin\oYckQIUU\hQIUUIMI.exe
    MD5

    faab22fda4f28ef8e3fa747251573ac8

    SHA1

    d859032cc40b5a977599268ed77455734e6b270d

    SHA256

    ade7516b3566719628b616cb5660d289a027a97751073df46db6cdff7bbbb417

    SHA512

    b1e04bcc2eeebd82505d5249b362c419afa7c3a1f0a820de33b46c73eefba78fd8eaaa133866da88f48dd0fa3ed1a1f17104378a0716ea35f76d663e6ebf60f2

  • \MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\ose.exe
    MD5

    9d10f99a6712e28f8acd5641e3a7ea6b

    SHA1

    835e982347db919a681ba12f3891f62152e50f0d

    SHA256

    70964a0ed9011ea94044e15fa77edd9cf535cc79ed8e03a3721ff007e69595cc

    SHA512

    2141ee5c07aa3e038360013e3f40969e248bed05022d161b992df61f21934c5574ed9d3094ffd5245f5afd84815b24f80bda30055cf4d374f9c6254e842f6bd5

  • \MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\setup.exe
    MD5

    4d92f518527353c0db88a70fddcfd390

    SHA1

    c4baffc19e7d1f0e0ebf73bab86a491c1d152f98

    SHA256

    97e6f3fc1a9163f10b6502509d55bf75ee893967fb35f318954797e8ab4d4d9c

    SHA512

    05a8136ccc45ef73cd5c70ee0ef204d9d2b48b950e938494b6d1a61dfba37527c9600382321d1c031dc74e4cf3e16f001ae0f8cd64d76d765f5509ce8dc76452

  • \MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\setup.exe
    MD5

    4d92f518527353c0db88a70fddcfd390

    SHA1

    c4baffc19e7d1f0e0ebf73bab86a491c1d152f98

    SHA256

    97e6f3fc1a9163f10b6502509d55bf75ee893967fb35f318954797e8ab4d4d9c

    SHA512

    05a8136ccc45ef73cd5c70ee0ef204d9d2b48b950e938494b6d1a61dfba37527c9600382321d1c031dc74e4cf3e16f001ae0f8cd64d76d765f5509ce8dc76452

  • \MSOCache\All Users\{90140000-0115-0409-0000-0000000FF1CE}-C\DW20.EXE
    MD5

    a41e524f8d45f0074fd07805ff0c9b12

    SHA1

    948deacf95a60c3fdf17e0e4db1931a6f3fc5d38

    SHA256

    082329648337e5ba7377fed9d8a178809f37eecb8d795b93cca4ec07d8640ff7

    SHA512

    91bf4be7e82536a85a840dbc9f3ce7b7927d1cedf6391aac93989abae210620433e685b86a12d133a72369a4f8a665c46ac7fc9e8a806e2872d8b1514cbb305f

  • \MSOCache\All Users\{90140000-0115-0409-0000-0000000FF1CE}-C\DW20.EXE
    MD5

    a41e524f8d45f0074fd07805ff0c9b12

    SHA1

    948deacf95a60c3fdf17e0e4db1931a6f3fc5d38

    SHA256

    082329648337e5ba7377fed9d8a178809f37eecb8d795b93cca4ec07d8640ff7

    SHA512

    91bf4be7e82536a85a840dbc9f3ce7b7927d1cedf6391aac93989abae210620433e685b86a12d133a72369a4f8a665c46ac7fc9e8a806e2872d8b1514cbb305f

  • \MSOCache\All Users\{90140000-0115-0409-0000-0000000FF1CE}-C\dwtrig20.exe
    MD5

    c87e561258f2f8650cef999bf643a731

    SHA1

    2c64b901284908e8ed59cf9c912f17d45b05e0af

    SHA256

    a1dfa6639bef3cb4e41175c43730d46a51393942ead826337ca9541ac210c67b

    SHA512

    dea4833aa712c5823f800f5f5a2adcf241c1b2b6747872f540f5ff9da6795c4ddb73db0912593337083c7c67b91e9eaf1b3d39a34b99980fd5904ba3d7d62f6c

  • \ProgramData\Package Cache\{ca67548a-5ebe-413a-b50c-4b9ceb6d66c6}\vcredist_x64.exe
    MD5

    2b48f69517044d82e1ee675b1690c08b

    SHA1

    83ca22c8a8e9355d2b184c516e58b5400d8343e0

    SHA256

    507bdc3ab5a6d9ddba2df68aff6f59572180134252f5eb8cb46f9bb23006b496

    SHA512

    97d9b130a483263ddf59c35baceba999d7c8db4effc97bcb935cb57acc7c8d46d3681c95e24975a099e701997330c6c6175e834ddb16abc48d5e9827c74a325b

  • \ProgramData\Package Cache\{ca67548a-5ebe-413a-b50c-4b9ceb6d66c6}\vcredist_x64.exe
    MD5

    2b48f69517044d82e1ee675b1690c08b

    SHA1

    83ca22c8a8e9355d2b184c516e58b5400d8343e0

    SHA256

    507bdc3ab5a6d9ddba2df68aff6f59572180134252f5eb8cb46f9bb23006b496

    SHA512

    97d9b130a483263ddf59c35baceba999d7c8db4effc97bcb935cb57acc7c8d46d3681c95e24975a099e701997330c6c6175e834ddb16abc48d5e9827c74a325b

  • \ProgramData\Package Cache\{ef6b00ec-13e1-4c25-9064-b2f383cb8412}\vcredist_x64.exe
    MD5

    e9e67cfb6c0c74912d3743176879fc44

    SHA1

    c6b6791a900020abf046e0950b12939d5854c988

    SHA256

    bacba0359c51bf0c74388273a35b95365a00f88b235143ab096dcca93ad4790c

    SHA512

    9bba881d9046ce31794a488b73b87b3e9c3ff09d641d21f4003b525d9078ae5cd91d2b002278e69699117e3c85bfa44a2cc7a184a42f38ca087616b699091aec

  • \ProgramData\Package Cache\{ef6b00ec-13e1-4c25-9064-b2f383cb8412}\vcredist_x64.exe
    MD5

    e9e67cfb6c0c74912d3743176879fc44

    SHA1

    c6b6791a900020abf046e0950b12939d5854c988

    SHA256

    bacba0359c51bf0c74388273a35b95365a00f88b235143ab096dcca93ad4790c

    SHA512

    9bba881d9046ce31794a488b73b87b3e9c3ff09d641d21f4003b525d9078ae5cd91d2b002278e69699117e3c85bfa44a2cc7a184a42f38ca087616b699091aec

  • \ProgramData\Package Cache\{f4220b74-9edd-4ded-bc8b-0342c1e164d8}\VC_redist.x64.exe
    MD5

    caa6e1dcae648ce17bc57a5b7d383cc8

    SHA1

    21fd5579a3d001779e5b8b107a326393d35dff4c

    SHA256

    14ad34fa255132c22b234bb4d30fe6cfd231f4947cccdcbbb94eb85e67135d92

    SHA512

    e4a63894895d20d5e455d6e8c9e81256f56f30f35bf8b385be103114d2e20885f3692bb3ec5e51d1a3073a072da5405200e5ed4a35956684bb8b515a20273ccf

  • \ProgramData\Package Cache\{f4220b74-9edd-4ded-bc8b-0342c1e164d8}\VC_redist.x64.exe
    MD5

    caa6e1dcae648ce17bc57a5b7d383cc8

    SHA1

    21fd5579a3d001779e5b8b107a326393d35dff4c

    SHA256

    14ad34fa255132c22b234bb4d30fe6cfd231f4947cccdcbbb94eb85e67135d92

    SHA512

    e4a63894895d20d5e455d6e8c9e81256f56f30f35bf8b385be103114d2e20885f3692bb3ec5e51d1a3073a072da5405200e5ed4a35956684bb8b515a20273ccf

  • \ProgramData\YCMsQscA\jIUEQwYA.exe
    MD5

    af3e22e414fbfd87d68ac7a07aa30dd1

    SHA1

    dd9d95be5bae9105e6e91e5c1cd3e2d124948cd4

    SHA256

    bc7203dc7ba35973ee5a2e2e9b7fc787425657a1d17db8c9af051d4fa36a02fd

    SHA512

    f1db3a0e439aa023a71b88d2f1bb2e7f9f1e5b22dde2678b056d731c667b5ae8e54a53276cd385858d9563a10f5665b84ceb9a2f87e847d5b7f2ba3eb8e35966

  • \ProgramData\YCMsQscA\jIUEQwYA.exe
    MD5

    af3e22e414fbfd87d68ac7a07aa30dd1

    SHA1

    dd9d95be5bae9105e6e91e5c1cd3e2d124948cd4

    SHA256

    bc7203dc7ba35973ee5a2e2e9b7fc787425657a1d17db8c9af051d4fa36a02fd

    SHA512

    f1db3a0e439aa023a71b88d2f1bb2e7f9f1e5b22dde2678b056d731c667b5ae8e54a53276cd385858d9563a10f5665b84ceb9a2f87e847d5b7f2ba3eb8e35966

  • \Users\Admin\AppData\Local\Temp\setup.exe
    MD5

    4d92f518527353c0db88a70fddcfd390

    SHA1

    c4baffc19e7d1f0e0ebf73bab86a491c1d152f98

    SHA256

    97e6f3fc1a9163f10b6502509d55bf75ee893967fb35f318954797e8ab4d4d9c

    SHA512

    05a8136ccc45ef73cd5c70ee0ef204d9d2b48b950e938494b6d1a61dfba37527c9600382321d1c031dc74e4cf3e16f001ae0f8cd64d76d765f5509ce8dc76452

  • \Users\Admin\oYckQIUU\hQIUUIMI.exe
    MD5

    faab22fda4f28ef8e3fa747251573ac8

    SHA1

    d859032cc40b5a977599268ed77455734e6b270d

    SHA256

    ade7516b3566719628b616cb5660d289a027a97751073df46db6cdff7bbbb417

    SHA512

    b1e04bcc2eeebd82505d5249b362c419afa7c3a1f0a820de33b46c73eefba78fd8eaaa133866da88f48dd0fa3ed1a1f17104378a0716ea35f76d663e6ebf60f2

  • \Users\Admin\oYckQIUU\hQIUUIMI.exe
    MD5

    faab22fda4f28ef8e3fa747251573ac8

    SHA1

    d859032cc40b5a977599268ed77455734e6b270d

    SHA256

    ade7516b3566719628b616cb5660d289a027a97751073df46db6cdff7bbbb417

    SHA512

    b1e04bcc2eeebd82505d5249b362c419afa7c3a1f0a820de33b46c73eefba78fd8eaaa133866da88f48dd0fa3ed1a1f17104378a0716ea35f76d663e6ebf60f2

  • memory/320-78-0x0000000000000000-mapping.dmp
  • memory/376-75-0x0000000000000000-mapping.dmp
  • memory/788-59-0x0000000075551000-0x0000000075553000-memory.dmp
    Filesize

    8KB

  • memory/876-72-0x0000000000000000-mapping.dmp
  • memory/1108-62-0x0000000000000000-mapping.dmp
  • memory/1448-80-0x0000000000000000-mapping.dmp
  • memory/1452-79-0x0000000000000000-mapping.dmp
  • memory/1732-67-0x0000000000000000-mapping.dmp