Analysis

  • max time kernel
    41s
  • max time network
    45s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    24-11-2022 17:14

General

  • Target

    ef2e71473f3ac713eaff2940036ede85b20f9c45782f8b83ce6943fd1944da80.exe

  • Size

    4.5MB

  • MD5

    ab54790269243228f29f5a1c3ffbab32

  • SHA1

    3198153a49d437e70324b048359f3072c4cb71ac

  • SHA256

    ef2e71473f3ac713eaff2940036ede85b20f9c45782f8b83ce6943fd1944da80

  • SHA512

    6690205076374b5be754e85c5b77f4c627ea7dbdb79225d68fb67b4c3416f23e0202698ae9f33146e18e2ea94388956cf1ab0c0afdd92b8f49dee74b2a83a4c7

  • SSDEEP

    49152:T4aKqZJkqNejCknaxup4ybgLptOyCzP5jaOCrZguQ4yoC3yE/Ac5mWxnmvh:cOJkPmk1kpthCzP5RWZgdoWNAxens

Malware Config

Signatures

  • Registers COM server for autorun 1 TTPs 4 IoCs
  • Loads dropped DLL 3 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Checks installed software on the system 1 TTPs

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

  • Drops Chrome extension 3 IoCs
  • Installs/modifies Browser Helper Object 2 TTPs 8 IoCs

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

  • Drops file in System32 directory 4 IoCs
  • Drops file in Program Files directory 8 IoCs
  • Modifies Internet Explorer settings 1 TTPs 8 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs
  • System policy modification 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ef2e71473f3ac713eaff2940036ede85b20f9c45782f8b83ce6943fd1944da80.exe
    "C:\Users\Admin\AppData\Local\Temp\ef2e71473f3ac713eaff2940036ede85b20f9c45782f8b83ce6943fd1944da80.exe"
    1⤵
    • Loads dropped DLL
    • Drops Chrome extension
    • Installs/modifies Browser Helper Object
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:800
    • C:\Windows\SysWOW64\regsvr32.exe
      regsvr32.exe /s "C:\Program Files (x86)\GoSave\ZwX8UKXS6DFEZj.x64.dll"
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:1492
      • C:\Windows\system32\regsvr32.exe
        /s "C:\Program Files (x86)\GoSave\ZwX8UKXS6DFEZj.x64.dll"
        3⤵
        • Registers COM server for autorun
        • Loads dropped DLL
        • Installs/modifies Browser Helper Object
        • Modifies Internet Explorer settings
        • Modifies registry class
        PID:1428

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Program Files (x86)\GoSave\ZwX8UKXS6DFEZj.dat

    Filesize

    4KB

    MD5

    d560a81b9ac69c9d945da0c16ffaf0fa

    SHA1

    e123ac77828115b42348c0ee06a237d1c34052b7

    SHA256

    1cc07ccd9d8087a4692e8bf7fbb434039f6f763cc78264ad8f7ea43431faf744

    SHA512

    8a8a72c3dcbd994a1eb123b2abf61e5078d7f92889ba96643c6c3669e93700187ef13e63e987917bfb4b0b3121e6850ba9daaee6fb7d035f96f71468234884ce

  • C:\Program Files (x86)\GoSave\ZwX8UKXS6DFEZj.tlb

    Filesize

    3KB

    MD5

    e3ab22d8beac0180520ab5289a64419b

    SHA1

    1456ba2c78b293e5a80185fefdf05f5dbe424937

    SHA256

    0d3342857b67678dd76e6a24e137f0d75ba399bb48bf5095d7e4f7dfa0bbe416

    SHA512

    c04163026ffa1c6fab34b4fdbf23702148c7c2a31dd356d26f9541027db078b6433aff3a5f749a209a3acbcf3a853a9b5f77984540e21be1f823ce92bcbfc4bf

  • C:\Program Files (x86)\GoSave\ZwX8UKXS6DFEZj.x64.dll

    Filesize

    872KB

    MD5

    337b97dbbcc7ad4d75fb5a90652e6de3

    SHA1

    50e50243af1819e62a7512d85e6dd67b8e1ed103

    SHA256

    b501a7a1e233ac26b0ba2fbbf54cbb782f98bc5484537e584fcbf4dcf5cc3f0c

    SHA512

    dab62835e885457c481d7ee4d76c1bc89278d5dc22178301629c78ad3215e1a4627a95f50b03587d8978e85cbba829f31acedf21c23773f5c526b0f76c8cf09e

  • \Program Files (x86)\GoSave\ZwX8UKXS6DFEZj.dll

    Filesize

    738KB

    MD5

    49961c7c9a7aef57f49adf50d1c810f6

    SHA1

    fc2078aeff5d5abee27c9e8a500cb2d6ae755b05

    SHA256

    c80abdc502d18db54137edc2680a498402c765999814b7fe1b2a7b69a64ce846

    SHA512

    8ad2c3dbd3b4390e4c49561f25ff2acdd4ab4468074e213f3efc81a598f71620e8f21fc87114623a6c0509997e47e1c4f5ffe703c7421ae313f7ba536df2772f

  • \Program Files (x86)\GoSave\ZwX8UKXS6DFEZj.x64.dll

    Filesize

    872KB

    MD5

    337b97dbbcc7ad4d75fb5a90652e6de3

    SHA1

    50e50243af1819e62a7512d85e6dd67b8e1ed103

    SHA256

    b501a7a1e233ac26b0ba2fbbf54cbb782f98bc5484537e584fcbf4dcf5cc3f0c

    SHA512

    dab62835e885457c481d7ee4d76c1bc89278d5dc22178301629c78ad3215e1a4627a95f50b03587d8978e85cbba829f31acedf21c23773f5c526b0f76c8cf09e

  • \Program Files (x86)\GoSave\ZwX8UKXS6DFEZj.x64.dll

    Filesize

    872KB

    MD5

    337b97dbbcc7ad4d75fb5a90652e6de3

    SHA1

    50e50243af1819e62a7512d85e6dd67b8e1ed103

    SHA256

    b501a7a1e233ac26b0ba2fbbf54cbb782f98bc5484537e584fcbf4dcf5cc3f0c

    SHA512

    dab62835e885457c481d7ee4d76c1bc89278d5dc22178301629c78ad3215e1a4627a95f50b03587d8978e85cbba829f31acedf21c23773f5c526b0f76c8cf09e

  • memory/800-54-0x0000000075521000-0x0000000075523000-memory.dmp

    Filesize

    8KB

  • memory/800-55-0x0000000000E70000-0x0000000000F39000-memory.dmp

    Filesize

    804KB

  • memory/1428-65-0x0000000000000000-mapping.dmp

  • memory/1428-66-0x000007FEFBA81000-0x000007FEFBA83000-memory.dmp

    Filesize

    8KB

  • memory/1492-61-0x0000000000000000-mapping.dmp