Analysis

  • max time kernel
    151s
  • max time network
    143s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    24-02-2021 23:50

General

  • Target

    sample29.exe

  • Size

    749KB

  • MD5

    d99fbbc4c24914cfe2127db57207cce4

  • SHA1

    64504d3fc4b681fc8ff7a48ba600480cab504585

  • SHA256

    002b7dd7d78428b7533bc0becd7b409ff44548935f3a0b6b5a59e1487697678e

  • SHA512

    b9885d3e111cd4933e09d12bdb8e366a59f85eb721f72456ecf4d6455cde1fd2d2610600b6004e8dd714a5cb5a5ccecbe4ab1c7f9f1c31953490da110744ca71

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
  • 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 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\sample29.exe
    "C:\Users\Admin\AppData\Local\Temp\sample29.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Loads dropped DLL
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:548
    • C:\Users\Admin\meAQokAU\gcogkkcY.exe
      "C:\Users\Admin\meAQokAU\gcogkkcY.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      PID:1820
    • C:\ProgramData\PYcIUkIw\OEAsYYYI.exe
      "C:\ProgramData\PYcIUkIw\OEAsYYYI.exe"
      2⤵
      • Executes dropped EXE
      • Checks computer location settings
      • Loads dropped DLL
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of FindShellTrayWindow
      PID:1928
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c C:\Users\Admin\AppData\Local\Temp\cpack.exe
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:1644
      • C:\Users\Admin\AppData\Local\Temp\cpack.exe
        C:\Users\Admin\AppData\Local\Temp\cpack.exe
        3⤵
        • Executes dropped EXE
        PID:396
    • 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:1708
    • 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:1700
    • 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:1696
  • C:\ProgramData\rOsscMQM\FUoswUkA.exe
    C:\ProgramData\rOsscMQM\FUoswUkA.exe
    1⤵
    • Executes dropped EXE
    • Adds Run key to start application
    • Drops file in System32 directory
    PID:1120

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\PYcIUkIw\OEAsYYYI.exe
    MD5

    19d1f9bdc04238315a877df50bd77b99

    SHA1

    ae3f1b3036a6d7442aa860ec84cc0dcaa3313c74

    SHA256

    aaa111a710e85313d08bbdbfbe0d926f7d84b8facb377c6d0d2514f72733923f

    SHA512

    ff01d855df7d16b61add8204ec0ffdc9d14de7f9e8df27b911126d284c96965301dbad3fe4fb0ca0c1f1d2a85fca38c4a3900c76e1b6eaa7f93aa166b6a8949a

  • C:\ProgramData\rOsscMQM\FUoswUkA.exe
    MD5

    0dc59d5c706f7e949d2facd14a40307e

    SHA1

    8d8786eb79ec1b42a96080927c22705f2d2ee3df

    SHA256

    4fcf31a2b52a07276afcc17bb1211369d3960cb3fff2c9ae83d159801c06a999

    SHA512

    f7840e96759f37a2c478e78b7e890363f3f257f8e5787c940e6a495824cf1d9b619dc31ebecca01ac6c32cf7191a140a1380331d3caf19ccb94be2a5f91beda8

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

    335d29efe02df08e6e2563bfca5e3c96

    SHA1

    b94ffc679f9c06a5bd7c1ff26428f536a1bd7a6d

    SHA256

    191d4982ce9dd2877d69b8190c84d62d343077218765a6beae116d2c17a10a03

    SHA512

    8b92f4bfa9826a8fe8bf04a71cea34eff974bc2cd33c1bb41e4f560b05b821e9079d4808fe9f87015a633a99aed450516f93c9af4e145868bbf8c1ebbf112ecc

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

    335d29efe02df08e6e2563bfca5e3c96

    SHA1

    b94ffc679f9c06a5bd7c1ff26428f536a1bd7a6d

    SHA256

    191d4982ce9dd2877d69b8190c84d62d343077218765a6beae116d2c17a10a03

    SHA512

    8b92f4bfa9826a8fe8bf04a71cea34eff974bc2cd33c1bb41e4f560b05b821e9079d4808fe9f87015a633a99aed450516f93c9af4e145868bbf8c1ebbf112ecc

  • C:\Users\Admin\meAQokAU\gcogkkcY.exe
    MD5

    ca1e8608192d66d87f376be7a03d4e51

    SHA1

    f07337b003c023fb9a3aad39b87d1da3f5c9f5ed

    SHA256

    e1b7ade0b856742b301a6303560fc882ae907d8182850ba3e90fce2417efef37

    SHA512

    b9966dd77cc684b8c108cf887ab22f7a94d7ca93ae7ab92a93b3e4427b7649da031586be621fc335f879171c3760eebb330c9e97bbc7ee0076a807a723ab5e6e

  • \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\PYcIUkIw\OEAsYYYI.exe
    MD5

    19d1f9bdc04238315a877df50bd77b99

    SHA1

    ae3f1b3036a6d7442aa860ec84cc0dcaa3313c74

    SHA256

    aaa111a710e85313d08bbdbfbe0d926f7d84b8facb377c6d0d2514f72733923f

    SHA512

    ff01d855df7d16b61add8204ec0ffdc9d14de7f9e8df27b911126d284c96965301dbad3fe4fb0ca0c1f1d2a85fca38c4a3900c76e1b6eaa7f93aa166b6a8949a

  • \ProgramData\PYcIUkIw\OEAsYYYI.exe
    MD5

    19d1f9bdc04238315a877df50bd77b99

    SHA1

    ae3f1b3036a6d7442aa860ec84cc0dcaa3313c74

    SHA256

    aaa111a710e85313d08bbdbfbe0d926f7d84b8facb377c6d0d2514f72733923f

    SHA512

    ff01d855df7d16b61add8204ec0ffdc9d14de7f9e8df27b911126d284c96965301dbad3fe4fb0ca0c1f1d2a85fca38c4a3900c76e1b6eaa7f93aa166b6a8949a

  • \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

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

    335d29efe02df08e6e2563bfca5e3c96

    SHA1

    b94ffc679f9c06a5bd7c1ff26428f536a1bd7a6d

    SHA256

    191d4982ce9dd2877d69b8190c84d62d343077218765a6beae116d2c17a10a03

    SHA512

    8b92f4bfa9826a8fe8bf04a71cea34eff974bc2cd33c1bb41e4f560b05b821e9079d4808fe9f87015a633a99aed450516f93c9af4e145868bbf8c1ebbf112ecc

  • \Users\Admin\meAQokAU\gcogkkcY.exe
    MD5

    ca1e8608192d66d87f376be7a03d4e51

    SHA1

    f07337b003c023fb9a3aad39b87d1da3f5c9f5ed

    SHA256

    e1b7ade0b856742b301a6303560fc882ae907d8182850ba3e90fce2417efef37

    SHA512

    b9966dd77cc684b8c108cf887ab22f7a94d7ca93ae7ab92a93b3e4427b7649da031586be621fc335f879171c3760eebb330c9e97bbc7ee0076a807a723ab5e6e

  • \Users\Admin\meAQokAU\gcogkkcY.exe
    MD5

    ca1e8608192d66d87f376be7a03d4e51

    SHA1

    f07337b003c023fb9a3aad39b87d1da3f5c9f5ed

    SHA256

    e1b7ade0b856742b301a6303560fc882ae907d8182850ba3e90fce2417efef37

    SHA512

    b9966dd77cc684b8c108cf887ab22f7a94d7ca93ae7ab92a93b3e4427b7649da031586be621fc335f879171c3760eebb330c9e97bbc7ee0076a807a723ab5e6e

  • memory/396-26-0x000000001AE30000-0x000000001AE32000-memory.dmp
    Filesize

    8KB

  • memory/396-24-0x0000000000130000-0x0000000000131000-memory.dmp
    Filesize

    4KB

  • memory/396-23-0x000007FEF5E50000-0x000007FEF683C000-memory.dmp
    Filesize

    9.9MB

  • memory/396-20-0x0000000000000000-mapping.dmp
  • memory/548-2-0x0000000076451000-0x0000000076453000-memory.dmp
    Filesize

    8KB

  • memory/1644-15-0x0000000000000000-mapping.dmp
  • memory/1696-18-0x0000000000000000-mapping.dmp
  • memory/1700-17-0x0000000000000000-mapping.dmp
  • memory/1708-16-0x0000000000000000-mapping.dmp
  • memory/1820-5-0x0000000000000000-mapping.dmp
  • memory/1928-10-0x0000000000000000-mapping.dmp