Analysis

  • max time kernel
    152s
  • max time network
    114s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    05-05-2021 02:52

General

  • Target

    94cbc3c99cf5fe566336268bce3d686f379fbdda333942fdcd4237d9976014d1.exe

  • Size

    1.0MB

  • MD5

    aefe361fe383f84049085089e15dc737

  • SHA1

    b918b4c4441c522cd277b644f7881512095cfbe6

  • SHA256

    94cbc3c99cf5fe566336268bce3d686f379fbdda333942fdcd4237d9976014d1

  • SHA512

    99439c74c5a05ac67deb7fd78f70b1f041963eba2868eb1465b27185617873a168828a9e42ceb9ac8ef464fedb2da00c3ca9a3b66b34b01c8964fedd44264621

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 19 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
  • Drops file in Windows directory 1 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 SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 31 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\94cbc3c99cf5fe566336268bce3d686f379fbdda333942fdcd4237d9976014d1.exe
    "C:\Users\Admin\AppData\Local\Temp\94cbc3c99cf5fe566336268bce3d686f379fbdda333942fdcd4237d9976014d1.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Loads dropped DLL
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:280
    • C:\Users\Admin\yackgosM\OwMEYwEI.exe
      "C:\Users\Admin\yackgosM\OwMEYwEI.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      PID:1912
    • C:\ProgramData\SmwoYAIw\qWkEUQIA.exe
      "C:\ProgramData\SmwoYAIw\qWkEUQIA.exe"
      2⤵
      • Executes dropped EXE
      • Modifies extensions of user files
      • Checks computer location settings
      • Loads dropped DLL
      • Adds Run key to start application
      • Drops file in Windows directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of FindShellTrayWindow
      PID:1472
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c C:\Users\Admin\AppData\Local\Temp\Setup.exe
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:432
      • C:\Users\Admin\AppData\Local\Temp\Setup.exe
        C:\Users\Admin\AppData\Local\Temp\Setup.exe
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetWindowsHookEx
        PID:816
    • 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:1500
    • 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:1112
    • 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:2028
  • C:\ProgramData\UOgMwkYA\xAYEIAkk.exe
    C:\ProgramData\UOgMwkYA\xAYEIAkk.exe
    1⤵
    • Executes dropped EXE
    • Adds Run key to start application
    • Drops file in System32 directory
    PID:1996

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\SmwoYAIw\qWkEUQIA.exe
    MD5

    6a77aa0fa4f655dbd24a7ed616e95320

    SHA1

    607e33da9fd43ccb8a146bf877eb02de693a9edc

    SHA256

    846083ad1cd4433b84d3bb8e71966ad478b28310a7a1ba2b47dfc1faf543481d

    SHA512

    6d9b911de5f68c272d5cbfa4d0042880a87ee5632ef52cabad4a54f1936f8fa6c96e05e6ab5a919c6a0d81f0bc0ea54120284e9d9ac6f1ff1edb81ec62ffd729

  • C:\ProgramData\UOgMwkYA\xAYEIAkk.exe
    MD5

    6386bbe8262924faaae3b208446477d5

    SHA1

    c123e39de2f6d7939154628a4de9f49803816612

    SHA256

    a3a3db3b5df7b29bab19461536ed8df6171f80774d089ec4f31686811f86825b

    SHA512

    4b031743a7e296af59c0b2849c904e45a97b0d56b24efbbd230b3ed18c5488f31f2fa061f9b1166ebc0e83f218c0f7fe69b014f97a900155af42d186e4246214

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

    96f7cb9f7481a279bd4bc0681a3b993e

    SHA1

    deaedb5becc6c0bd263d7cf81e0909b912a1afd4

    SHA256

    d2893c55259772b554cb887d3e2e1f9c67f5cd5abac2ab9f4720dec507cdd290

    SHA512

    694d2da36df04db25cc5972f7cc180b77e1cb0c3b5be8b69fe7e2d4e59555efb8aa7e50b1475ad5196ca638dabde2c796ae6faeb4a31f38166838cd1cc028149

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

    96f7cb9f7481a279bd4bc0681a3b993e

    SHA1

    deaedb5becc6c0bd263d7cf81e0909b912a1afd4

    SHA256

    d2893c55259772b554cb887d3e2e1f9c67f5cd5abac2ab9f4720dec507cdd290

    SHA512

    694d2da36df04db25cc5972f7cc180b77e1cb0c3b5be8b69fe7e2d4e59555efb8aa7e50b1475ad5196ca638dabde2c796ae6faeb4a31f38166838cd1cc028149

  • C:\Users\Admin\yackgosM\OwMEYwEI.exe
    MD5

    d862fd5686feb2d0318d3618b588e967

    SHA1

    5ca2f559343d4ea48ef8e89defaeb67bf0f02ec2

    SHA256

    83946fc4616cd92be44a635ddbd4c93578b76d9d05d231943d18081b1db46f98

    SHA512

    7f253ca3a53baea97a28da2efa521065abbcb71695f5bd67c52c2f2609957fc48c889cbbc6ff24d8064cf98cbd69032f95a83457964c55244e4846be51127096

  • \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\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\SmwoYAIw\qWkEUQIA.exe
    MD5

    6a77aa0fa4f655dbd24a7ed616e95320

    SHA1

    607e33da9fd43ccb8a146bf877eb02de693a9edc

    SHA256

    846083ad1cd4433b84d3bb8e71966ad478b28310a7a1ba2b47dfc1faf543481d

    SHA512

    6d9b911de5f68c272d5cbfa4d0042880a87ee5632ef52cabad4a54f1936f8fa6c96e05e6ab5a919c6a0d81f0bc0ea54120284e9d9ac6f1ff1edb81ec62ffd729

  • \ProgramData\SmwoYAIw\qWkEUQIA.exe
    MD5

    6a77aa0fa4f655dbd24a7ed616e95320

    SHA1

    607e33da9fd43ccb8a146bf877eb02de693a9edc

    SHA256

    846083ad1cd4433b84d3bb8e71966ad478b28310a7a1ba2b47dfc1faf543481d

    SHA512

    6d9b911de5f68c272d5cbfa4d0042880a87ee5632ef52cabad4a54f1936f8fa6c96e05e6ab5a919c6a0d81f0bc0ea54120284e9d9ac6f1ff1edb81ec62ffd729

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

    96f7cb9f7481a279bd4bc0681a3b993e

    SHA1

    deaedb5becc6c0bd263d7cf81e0909b912a1afd4

    SHA256

    d2893c55259772b554cb887d3e2e1f9c67f5cd5abac2ab9f4720dec507cdd290

    SHA512

    694d2da36df04db25cc5972f7cc180b77e1cb0c3b5be8b69fe7e2d4e59555efb8aa7e50b1475ad5196ca638dabde2c796ae6faeb4a31f38166838cd1cc028149

  • \Users\Admin\yackgosM\OwMEYwEI.exe
    MD5

    d862fd5686feb2d0318d3618b588e967

    SHA1

    5ca2f559343d4ea48ef8e89defaeb67bf0f02ec2

    SHA256

    83946fc4616cd92be44a635ddbd4c93578b76d9d05d231943d18081b1db46f98

    SHA512

    7f253ca3a53baea97a28da2efa521065abbcb71695f5bd67c52c2f2609957fc48c889cbbc6ff24d8064cf98cbd69032f95a83457964c55244e4846be51127096

  • \Users\Admin\yackgosM\OwMEYwEI.exe
    MD5

    d862fd5686feb2d0318d3618b588e967

    SHA1

    5ca2f559343d4ea48ef8e89defaeb67bf0f02ec2

    SHA256

    83946fc4616cd92be44a635ddbd4c93578b76d9d05d231943d18081b1db46f98

    SHA512

    7f253ca3a53baea97a28da2efa521065abbcb71695f5bd67c52c2f2609957fc48c889cbbc6ff24d8064cf98cbd69032f95a83457964c55244e4846be51127096

  • memory/280-60-0x0000000075041000-0x0000000075043000-memory.dmp
    Filesize

    8KB

  • memory/432-73-0x0000000000000000-mapping.dmp
  • memory/816-79-0x0000000000000000-mapping.dmp
  • memory/1112-75-0x0000000000000000-mapping.dmp
  • memory/1472-68-0x0000000000000000-mapping.dmp
  • memory/1500-74-0x0000000000000000-mapping.dmp
  • memory/1912-63-0x0000000000000000-mapping.dmp
  • memory/2028-76-0x0000000000000000-mapping.dmp