Analysis

  • max time kernel
    147s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240221-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24-02-2024 10:56

General

  • Target

    a1b14b73897c12825d4d994e9a817140.exe

  • Size

    2.7MB

  • MD5

    a1b14b73897c12825d4d994e9a817140

  • SHA1

    4e910b049638d6ad8aaf90832336c6c0a2cb48f0

  • SHA256

    f21353e4a527dd03b2c5feac9e4d21c5cbb657be026095d9a6cb32c34a0a94ce

  • SHA512

    71bed6b79dbdfb85b692c09def3f17f9dc0f3c20825dad5ab2427f452e94372aee402cadcacc0a9e70ad51e9f6aaba314309b04c540e3608d81bf22e8f583de8

  • SSDEEP

    49152:6QgA7wy45ejW+0VmC9JXHnIYFFpI1vBhTodumyjJOjFzK:6Qg4w7GW+0VmC9JXHIYfkvBhTodumyjt

Malware Config

Signatures

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 23 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 2 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Installs/modifies Browser Helper Object 2 TTPs 5 IoCs

    BHOs are DLL modules which act as plugins for Internet Explorer.

  • Drops file in System32 directory 2 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies Internet Explorer settings 1 TTPs 5 IoCs
  • Modifies data under HKEY_USERS 3 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a1b14b73897c12825d4d994e9a817140.exe
    "C:\Users\Admin\AppData\Local\Temp\a1b14b73897c12825d4d994e9a817140.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2544
    • C:\Users\Admin\AppData\Local\Temp\bar.0\MWSSETUP.EXE
      "C:\Users\Admin\AppData\Local\Temp\bar.0\MWSSETUP.EXE" "C:\Users\Admin\AppData\Local\Temp\a1b14b73897c12825d4d994e9a817140.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Loads dropped DLL
      • Adds Run key to start application
      • Installs/modifies Browser Helper Object
      • Drops file in System32 directory
      • Drops file in Program Files directory
      • Modifies Internet Explorer settings
      • Modifies data under HKEY_USERS
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:2180
      • C:\PROGRA~2\MYWEBS~1\bar\1.bin\mwsoemon.exe
        "C:\PROGRA~2\MYWEBS~1\bar\1.bin\mwsoemon.exe" /d
        3⤵
        • Executes dropped EXE
        PID:1704
      • C:\PROGRA~2\MYWEBS~1\bar\1.bin\mwsoemon.exe
        "C:\PROGRA~2\MYWEBS~1\bar\1.bin\mwsoemon.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of SetWindowsHookEx
        PID:2636
    • C:\Users\Admin\AppData\Local\Temp\bar.0\MWSSRCSP.EXE
      "C:\Users\Admin\AppData\Local\Temp\bar.0\MWSSRCSP.EXE" "C:\Users\Admin\AppData\Local\Temp\a1b14b73897c12825d4d994e9a817140.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Installs/modifies Browser Helper Object
      • Drops file in Program Files directory
      • Modifies Internet Explorer settings
      • Modifies registry class
      PID:4504

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\PROGRA~2\MYWEBS~1\bar\1.bin\MWSOEMON.EXE

    Filesize

    28KB

    MD5

    dd59256ad65f4cdca0bce69216ae403b

    SHA1

    6e7383b770b88361ed4aa1120ae7fde1b802e536

    SHA256

    ec6909802e2357cb896baa0625564f02649386cc5dc9c293deb3715c5c6a37cd

    SHA512

    102bdd6cc34b3a02ccf885b256d3fc0422ed2d8e76ded3ffa7e053193ae3d1ff47e4794ea512966d8c131a9bd7dfaa771d3e2740efced59681fa53e419abf061

  • C:\PROGRA~2\MYWEBS~1\bar\1.bin\mwsoestb.dll

    Filesize

    40KB

    MD5

    9faaea13c25a9e88998b246f5efaa0e7

    SHA1

    7ff8a9a1830f1d34bea6cd7bf8b2a05fff2e7f98

    SHA256

    0a41b5a451d3bfb693c8d967d0d818c1c346df6030f7bfad90ad9445fe04cb75

    SHA512

    a5e8d9e4eef0844da09df6ab4eb8dbfd54eb8a1533609747ba0f896acd3906896e3f7225fb00bf94de0f17126b1690ef357d2d62167e886229e3e799a8fcbe3b

  • C:\Program Files (x86)\MyWebSearch\SrchAstt\1.bin\MWSSRCAS.DLL

    Filesize

    56KB

    MD5

    8965254e205f2696b019c651f8993b27

    SHA1

    7344bf36d56b6cb36366b9e41ac4b192398c4d51

    SHA256

    bd69d7edbf471e889d3743d806914867c833edb7afc8a3f6454ccee859325be1

    SHA512

    cdcb99bc47c41130f4e44a9ea79e735159413ea884baca1fd3eb28643e488d4c0f7e18590f87e467ad7ee290b7dd99f2870a767b3a6625eee1d4c36a91c1e771

  • C:\Program Files (x86)\MyWebSearch\bar\1.bin\F3CJPEG.DLL

    Filesize

    136KB

    MD5

    1d943cb3cbdd92161ae32532fb88265d

    SHA1

    78c77209fae53d1b449000a4db8b3dae840ebb3c

    SHA256

    3f740bbec0ae71dcf87d640a914ad3ae487a75887f8242c75524ef91d54afc62

    SHA512

    d61b6882a0919408be27c28f0c18d8361e4df275e14b0f664474877c008fba8629357fca3b24149f9a64bfcc6817eda95ad0378d2e3e56d7900e3ca2e5f04a17

  • C:\Program Files (x86)\MyWebSearch\bar\1.bin\F3DTACTL.DLL

    Filesize

    64KB

    MD5

    e11b7692643b94d7ef42de476cf88d9e

    SHA1

    61a5d849ca2b86153116845839af15b6fce3aad7

    SHA256

    99ff6a34bf99647af34947d5274e33f71b4c4a2b66bc317f9e6ab3086cdac7fc

    SHA512

    a11fcb41be94cdf6e32fa64d1208abc2ee53e2f1824f09a53a928a48f1d66a77fa62990e789b788326082afae284bc58cc9301b0ec73a8c46d644ac972aefd69

  • C:\Program Files (x86)\MyWebSearch\bar\1.bin\F3HISTSW.DLL

    Filesize

    244KB

    MD5

    e12730adb54fc2d75c5138c1165072b6

    SHA1

    c803ff72de92902f5ed4d2365db35431d1e25100

    SHA256

    b5caad4e6c5839d16f264d80548943e82013bc42fbe3315553861b5dd6d4bd4d

    SHA512

    537b2a1bb6bf71c9638bb47988e2576f28a17c8bc2e985db2131c9da2c222debd88720afe0dbabe8161a03eb35ee42dd984b268683ab9094bd3d849833aa58c0

  • C:\Program Files (x86)\MyWebSearch\bar\1.bin\F3HTMLMU.DLL

    Filesize

    120KB

    MD5

    d8ddca94a26244aa83aeffc35b65ce71

    SHA1

    61e33b82f008bd11f74144b78afdae47cc6b2530

    SHA256

    4d240f474d372b5c1de8d766bd3f8b9215d95dcb948719ce8427743335d79160

    SHA512

    5f9c46c267309e74ec653428666f84e95fc427e9c6941ff860bef984cc1a08c5cabd65aa7b7576e36e5fcb8858c119333e2bbfc70523d208987d17cb96c485a3

  • C:\Program Files (x86)\MyWebSearch\bar\1.bin\F3HTTPCT.DLL

    Filesize

    72KB

    MD5

    03e5f2e8ea3812e438d6bc34be6ce726

    SHA1

    50afb50a8fcd11cd2cd59f2564fe7b60bbfcf3ce

    SHA256

    40e6b8a99dbb872e6fcc1ba7c0ddb8f2ff0f717e586ee024962a6c2ce0f6af47

    SHA512

    9b613ad3e478ab9caffc6142628b845deef80e3c2f27c12f8c5eb581ee44f3ca0d0ee582fd7d970194cea8bd3aa99b697fc05249b635e1836182cd10b8a370e1

  • C:\Program Files (x86)\MyWebSearch\bar\1.bin\F3IMSTUB.DLL

    Filesize

    24KB

    MD5

    7272bf7bbd5eb20be011f975a81350cf

    SHA1

    567ccdd7a4642ea15609d8a1d6b5970a59af567f

    SHA256

    e522bcdc8dd85af3cea65dc6641ff533e087fbea3aed54d04b6fada4cbefa3ad

    SHA512

    a9da83278eaf4921b53262fb4f67ca5892e30d98dd73720206706fc234aa065ee652e5917d73bcd040dd013be9606c0948962579d138420caf0ec8e61bf635eb

  • C:\Program Files (x86)\MyWebSearch\bar\1.bin\F3POPSWT.DLL

    Filesize

    116KB

    MD5

    96da779e21e40dad5db7c670bd93c996

    SHA1

    00b224187ce4c7e378e954db76d1af86ddf1403b

    SHA256

    c2fc451128f64880e1f79bbda15de0c7be67f8bc43fac35cc760fc433d3ec94d

    SHA512

    edb221d8191e757b3ed69d4eef1335f1dd1e0feaf6fb3ad9cbf6c739862ab0d8e983a5eafb9afda6f49650e592f925177349bb3e06ecf31aa3e2bb5bfb46fb1f

  • C:\Program Files (x86)\MyWebSearch\bar\1.bin\F3PSSAVR.SCR

    Filesize

    28KB

    MD5

    7f9361a12b2dfebec6c22b52446e3cf8

    SHA1

    d28a12771c99ca5205219427d3bce2d22b6495f4

    SHA256

    0e7652b9c9d03b9f3a6ecdc18d60c69fa419b06bcdc3712f992a6a27d89e6e9f

    SHA512

    d8fe9be66c7de83f354449b37eea33549fecebda707b31f04edf4df362893039c07778780e409cdcffbe7cd642a17c8cb42dc925c7fb1668621db9e289f1af2f

  • C:\Program Files (x86)\MyWebSearch\bar\1.bin\F3REPROX.DLL

    Filesize

    92KB

    MD5

    ff2d63823491a2b622c16d085a764a2a

    SHA1

    9ce6e04ff68a9e9a3d4774a69eb8191318639066

    SHA256

    f0c6690a674330d38031353f21914565dc38f2e40ef48d58c4fa413289fad5cc

    SHA512

    62b5571fbcff508864d79de92491060551534964cbbdade3faea5c3438ce94c370bef55cd497cbef632bc698ed538d325724f23be9ca0e425461fcb5f34acdaa

  • C:\Program Files (x86)\MyWebSearch\bar\1.bin\F3RESTUB.DLL

    Filesize

    24KB

    MD5

    e9b3073dbf662cae01d79a4bda061018

    SHA1

    23ae964b34ecd915c4146ee46c0224b1d87c680c

    SHA256

    a3bbeab90b9e056fce5f35fe8a5aa11ccf564a695b23a3b75fa22d9edf436035

    SHA512

    eb62ce0fee8a8536ed710850468e1b1bcb4a0fff059590405362a366b160d10409ec8f8be90c0a4207676a1a5e0086636f98e2442a9e2f2224e375a911286fa4

  • C:\Program Files (x86)\MyWebSearch\bar\1.bin\F3SCRCTR.DLL

    Filesize

    284KB

    MD5

    633686c1f4c5e7da080f2314880e2040

    SHA1

    c7f33a33385174674639f290fd2e8e8d46f1fecc

    SHA256

    a2039edf550b7e8e098a5793b70078426f555cf14d40d0b865b1e330ab8942e6

    SHA512

    4e51a730340916013761b2c671448c89bbde2113d348f0bc838ed9cf32edca9d18d2429ac3c1000ced166767288200e0d3d78a9d2118645c9c485fbb0d319dab

  • C:\Program Files (x86)\MyWebSearch\bar\1.bin\F3SHLLVW.DLL

    Filesize

    140KB

    MD5

    018d30e0bd67e08eea098fecd3ec8da0

    SHA1

    818207a073dc6d58554861f7cb8f300e2312688d

    SHA256

    9524561c123070d11dc286e9a6752a271a4c3272728574533b705d60ee16e4c7

    SHA512

    fb2da81e3fd81c0e77bac080e8c5e0a0e5516065be525a2cc65ea0d7a1faa805b3bf78374a64aaa000bdc2e9eafa1cf0f1cbeecf336f784e2ea03bb534514baf

  • C:\Program Files (x86)\MyWebSearch\bar\1.bin\F3WPHOOK.DLL

    Filesize

    20KB

    MD5

    cee57e05eccf470e751689ded838b7d2

    SHA1

    0abbc8d0284780bfa10d09f8b78c4964ffaffecd

    SHA256

    2cf54c47ddbc69ebc4e199e11c15c202844645aa97aed823ad2ac2df54df92f3

    SHA512

    4c0399857b5152185195cd27bcb8cefd15690499ab8ea426ef53a83b9ed9e7037786eef2f3fbe9ac625d3a48364f2b343f5eb24767d9dd404ece37c88265d161

  • C:\Program Files (x86)\MyWebSearch\bar\1.bin\M3HTML.DLL

    Filesize

    80KB

    MD5

    0366f9d95495fbc5d9716086cca64def

    SHA1

    68c5477032811eb78e73ac526b37dd7cc8b684f2

    SHA256

    ff9e70a61754e400b92e91d20359c04f0a85fafc483186ce1c29e140d0a94b57

    SHA512

    49c619ae9b2c714976f30f041ed710c1862ab39ee83c996973c0545ce355f5a94832cb8416fe5feb85e41fb0909ecf2726c19f7833a2ec47b8e891a5dd3b3345

  • C:\Program Files (x86)\MyWebSearch\bar\1.bin\M3IDLE.DLL

    Filesize

    28KB

    MD5

    e96db55df87cfb08293e2dd1ccb5dceb

    SHA1

    9fb6bcf3b27e4800111046e4acdf51bb3455fec7

    SHA256

    593637fead6adc228609ded0b86b99ac92f4dfad094f45b1d5daaffb61f9ae41

    SHA512

    47aaae5770eb231ea1d09069cf579f9b3bdeaee6a9af46c7686d291a2158d50ff756fd6c4a5a69c6f0c6489b5085edaf1224a72677495bda7774dcf75a1695fc

  • C:\Program Files (x86)\MyWebSearch\bar\1.bin\M3OUTLCN.DLL

    Filesize

    56KB

    MD5

    d3dc055a901b6ef0bb4d01fdb142cac8

    SHA1

    105b6c14ecc409fe245740a8f51da2f6cd0e0240

    SHA256

    c1881164bb57b58c5fa1a52fe1521c4bd77a6eb5a65713cb88a43735a3eee115

    SHA512

    b758949d58f8332fc56afb6aa3da9374ece71bde98a9dabd8d92cb110fecafec9f772ad4246febd9f2dbbe51a1054f1e65f08d428ee0fed14d1f5e5728cf8183

  • C:\Program Files (x86)\MyWebSearch\bar\1.bin\M3PLUGIN.DLL

    Filesize

    48KB

    MD5

    207f30e7447503ec85cff6ca3a2c80d1

    SHA1

    802c923cdd0c92ee89d0327ce6af9efce61a5d45

    SHA256

    3bbad3a65d52b495f553fb84b33b815758de8498b06542811be21eec37275906

    SHA512

    6401671843dc26385953fa43f62c47de561af017c2a241191b9c1d26157b38b0ab3bdd1f8590da45a2b39779e13c32eea8de00f6e60b2bf11abfbe341cfc093c

  • C:\Program Files (x86)\MyWebSearch\bar\1.bin\M3SKIN.DLL

    Filesize

    112KB

    MD5

    660b4305719eb04cb96320314e64ebb2

    SHA1

    cc4224c33929488258752f10e4ed6614975d478c

    SHA256

    c2b6c2a257fedf26f85a72b9ad1e8b697c6d3c5685423e921bd74618009b91bb

    SHA512

    5dc0a6aae9b93ca6bdb2b2d661e7c892349ee649b5b4600029291aeaf3bb7309f1f4a5b8eb57bb56b55f1db14f76df1e777a57e5cb36d1ed8420d37f7d92dfe8

  • C:\Program Files (x86)\MyWebSearch\bar\1.bin\MWSBAR.DLL

    Filesize

    300KB

    MD5

    5709870f72d8a5238ee87769008080ba

    SHA1

    7476b4a1f3416639ee010cca48a54ca5b796624c

    SHA256

    7efb587b380c7d8db76c0ddca515a22ec4d767425097af4998f4d3be6e32e8b2

    SHA512

    53d93ebf6cb1a2470074b3f2829e9440c45752a34ad77edf6b70c3e950c8ba930c5b5353dd7aee65dc1c52c0ba12a71a7cca081cbed72fbb8a7a8c22d750f502

  • C:\Program Files (x86)\MyWebSearch\bar\1.bin\MWSOEPLG.DLL

    Filesize

    300KB

    MD5

    424e044fd204ff7beb61d0d6a277ca71

    SHA1

    1d8e389a961af54056aa2005350ec8d58f579ced

    SHA256

    884a83ac865b26fad854ff0dc76ab81f55de3fd063c0364e7da1bf89b3e6b78b

    SHA512

    6ed5cb68c175c4c70f9087061292aa3ff7ebbac7df904fb57dce2b72492eea78f9da7e2b88ddf709adcbec8891f243eea89a9036e4b346fbec23bcb53c70156f

  • C:\Program Files (x86)\MyWebSearch\bar\1.bin\NPMYWEBS.DLL

    Filesize

    24KB

    MD5

    d185292c547e25e4eed729a8c6df40d8

    SHA1

    c75b68b48458eec86658000a0cd7ca33251bd6b1

    SHA256

    d29d938d2968c296001f564a0559d06a6138f7abf1be61da4a710d464c5536d8

    SHA512

    3b2d8f37efaec2aff0c0da7906f1eae4c840424454683ee260cc8e6c003ab4a55e41935fd45196de876ff5569ae27680c74615ec03426c73e1573f762ef81fb6

  • C:\Users\Admin\AppData\Local\Temp\bar.0\MWSSETUP.EXE

    Filesize

    2.6MB

    MD5

    a96ac7e53bf2dfc62f4358d521b82439

    SHA1

    3793e3a6d64a46f893e36047013754977247bc7e

    SHA256

    6b217075440abe30e25a1c05094dcbd309cf5b5b32930de977ff8d015c8def4c

    SHA512

    3a63b6c0d8ced0696223130e5c598d9c53352b1caf9525e36a819c69a9c0af589c1665d46f3908beb3ceddf1fca37230c51c031ac961002fc538a1991bb429a3

  • C:\Users\Admin\AppData\Local\Temp\bar.0\MWSSRCSP.EXE

    Filesize

    76KB

    MD5

    799caf0a8c2f59f905be08384c3deb97

    SHA1

    3e07f9658e02f39a30a1754f0449bbdae6980720

    SHA256

    b461fb63bfd3034846138d63d2df7051f6f5ad58474a1a41a702d76494639e50

    SHA512

    b4446d54897958efe840e489f29de15070b2438213906f3d0eabb34b854cba58995152c0b8680924aa4ccc15f60ac6d18d031a1e383a801bedc62d436cf3c422