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Resubmissions

02/09/2023, 14:51

230902-r8cxhaea23 10

02/09/2023, 14:49

230902-r65vhadf3s 10

Analysis

  • max time kernel
    96s
  • max time network
    103s
  • platform
    windows10-1703_x64
  • resource
    win10-20230831-en
  • resource tags

    arch:x64arch:x86image:win10-20230831-enlocale:en-usos:windows10-1703-x64system
  • submitted
    02/09/2023, 14:51

General

  • Target

    Grammarly Promotional Launcher.exe

  • Size

    20.4MB

  • MD5

    9ed667ef1d116c0cb1051b8001b6ea0f

  • SHA1

    cbe4fdb8847ff9b5d0aa1e0a43bb3abd28f4a875

  • SHA256

    deba2be10d757679996d33d70d37b968088ba37e1d0f86d71beb8be38c34262f

  • SHA512

    4fc726f8f2ca7f024f5db1a660a3c9dff109014cc2f56097470b317950d05956c084f2e19fb9da3d14d589444c2bb0a7a370bce8b5dc049b5d3e774994bdd4e1

  • SSDEEP

    393216:onRZwqeWLCKhc+0Uz+JD8rY5Pobe7n/k8MoeTtqLiVc4GYbJQp:CN1hxX+QrY5PAe7/kHtsii4bbJG

Malware Config

Extracted

Family

stealc

Botnet

9323114451583182971321730716

C2

http://89.23.108.122

Attributes
  • url_path

    /e510c4e87f874d68.php

rc4.plain

Signatures

  • Stealc

    Stealc is an infostealer written in C++.

  • Downloads MZ/PE file
  • Loads dropped DLL 2 IoCs
  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Enumerates connected drives 3 TTPs 1 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Suspicious behavior: EnumeratesProcesses 17 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Grammarly Promotional Launcher.exe
    "C:\Users\Admin\AppData\Local\Temp\Grammarly Promotional Launcher.exe"
    1⤵
    • Enumerates connected drives
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1544
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoProfile -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBzACAAMQAwAA==
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:208
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
      2⤵
      • Loads dropped DLL
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:4776

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_fjjgz12i.zjw.ps1

    Filesize

    1B

    MD5

    c4ca4238a0b923820dcc509a6f75849b

    SHA1

    356a192b7913b04c54574d18c28d46e6395428ab

    SHA256

    6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b

    SHA512

    4dff4ea340f0a823f15d3f4f01ab62eae0e5da579ccb851f8db9dfe84c58b2b37b89903a740e1ee172da793a6e79d560e5f7f9bd058a12a280433ed6fa46510a

  • \ProgramData\mozglue.dll

    Filesize

    593KB

    MD5

    c8fd9be83bc728cc04beffafc2907fe9

    SHA1

    95ab9f701e0024cedfbd312bcfe4e726744c4f2e

    SHA256

    ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

    SHA512

    fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

  • \ProgramData\nss3.dll

    Filesize

    2.0MB

    MD5

    1cc453cdf74f31e4d913ff9c10acdde2

    SHA1

    6e85eae544d6e965f15fa5c39700fa7202f3aafe

    SHA256

    ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

    SHA512

    dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

  • memory/208-47-0x00000206303A0000-0x00000206303B0000-memory.dmp

    Filesize

    64KB

  • memory/208-49-0x00000206303A0000-0x00000206303B0000-memory.dmp

    Filesize

    64KB

  • memory/208-48-0x00000206303A0000-0x00000206303B0000-memory.dmp

    Filesize

    64KB

  • memory/208-25-0x0000020630340000-0x0000020630362000-memory.dmp

    Filesize

    136KB

  • memory/208-46-0x00007FFDC3440000-0x00007FFDC3E2C000-memory.dmp

    Filesize

    9.9MB

  • memory/208-53-0x00007FFDC3440000-0x00007FFDC3E2C000-memory.dmp

    Filesize

    9.9MB

  • memory/208-30-0x00000206303A0000-0x00000206303B0000-memory.dmp

    Filesize

    64KB

  • memory/208-31-0x0000020630530000-0x00000206305A6000-memory.dmp

    Filesize

    472KB

  • memory/208-29-0x00000206303A0000-0x00000206303B0000-memory.dmp

    Filesize

    64KB

  • memory/208-28-0x00007FFDC3440000-0x00007FFDC3E2C000-memory.dmp

    Filesize

    9.9MB

  • memory/1544-10-0x00007FFDDF350000-0x00007FFDDF352000-memory.dmp

    Filesize

    8KB

  • memory/1544-8-0x00007FFDDF330000-0x00007FFDDF332000-memory.dmp

    Filesize

    8KB

  • memory/1544-15-0x00007FFDDF3A0000-0x00007FFDDF3A2000-memory.dmp

    Filesize

    8KB

  • memory/1544-16-0x00007FFDDF3B0000-0x00007FFDDF3B2000-memory.dmp

    Filesize

    8KB

  • memory/1544-17-0x00007FFDDF3C0000-0x00007FFDDF3C2000-memory.dmp

    Filesize

    8KB

  • memory/1544-18-0x00007FFDDF3D0000-0x00007FFDDF3D2000-memory.dmp

    Filesize

    8KB

  • memory/1544-19-0x0000000140000000-0x0000000141469000-memory.dmp

    Filesize

    20.4MB

  • memory/1544-20-0x0000000140000000-0x0000000141469000-memory.dmp

    Filesize

    20.4MB

  • memory/1544-13-0x00007FFDDF380000-0x00007FFDDF382000-memory.dmp

    Filesize

    8KB

  • memory/1544-12-0x00007FFDDF370000-0x00007FFDDF372000-memory.dmp

    Filesize

    8KB

  • memory/1544-11-0x00007FFDDF360000-0x00007FFDDF362000-memory.dmp

    Filesize

    8KB

  • memory/1544-0-0x00007FFDDF2C0000-0x00007FFDDF2C2000-memory.dmp

    Filesize

    8KB

  • memory/1544-9-0x00007FFDDF340000-0x00007FFDDF342000-memory.dmp

    Filesize

    8KB

  • memory/1544-14-0x00007FFDDF390000-0x00007FFDDF392000-memory.dmp

    Filesize

    8KB

  • memory/1544-7-0x00007FFDDF320000-0x00007FFDDF322000-memory.dmp

    Filesize

    8KB

  • memory/1544-6-0x00007FFDDF310000-0x00007FFDDF312000-memory.dmp

    Filesize

    8KB

  • memory/1544-5-0x00007FFDDF300000-0x00007FFDDF302000-memory.dmp

    Filesize

    8KB

  • memory/1544-4-0x00007FFDDF2F0000-0x00007FFDDF2F2000-memory.dmp

    Filesize

    8KB

  • memory/1544-3-0x00007FFDDF2E0000-0x00007FFDDF2E2000-memory.dmp

    Filesize

    8KB

  • memory/1544-2-0x00007FFDDF2D0000-0x00007FFDDF2D2000-memory.dmp

    Filesize

    8KB

  • memory/1544-1-0x0000000140000000-0x0000000141469000-memory.dmp

    Filesize

    20.4MB

  • memory/1544-59-0x0000000140000000-0x0000000141469000-memory.dmp

    Filesize

    20.4MB

  • memory/4776-58-0x0000000000400000-0x000000000062D000-memory.dmp

    Filesize

    2.2MB

  • memory/4776-60-0x0000000061E00000-0x0000000061EF3000-memory.dmp

    Filesize

    972KB

  • memory/4776-57-0x0000000000400000-0x000000000062D000-memory.dmp

    Filesize

    2.2MB

  • memory/4776-54-0x0000000000400000-0x000000000062D000-memory.dmp

    Filesize

    2.2MB

  • memory/4776-115-0x0000000000400000-0x000000000062D000-memory.dmp

    Filesize

    2.2MB