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Analysis

  • max time kernel
    42s
  • max time network
    46s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    01/12/2022, 15:48

General

  • Target

    fd8aea8afeba8a171afc6b81a9c0a418be0b90c7a8cffccb3f1712333377191a.exe

  • Size

    2.2MB

  • MD5

    306e9be63813dcd81bc3a74871f0a665

  • SHA1

    900848f008d7bcac739b63899821778ce7c13e0f

  • SHA256

    fd8aea8afeba8a171afc6b81a9c0a418be0b90c7a8cffccb3f1712333377191a

  • SHA512

    500431564a290b4500b1a175dbab5d2c50fcea8a93aca1d91bf0658ffc3402134a2fad1820d979f8c2ba2aa9c51519f771d9d64ad45f6147f0d6cf8e0ef36527

  • SSDEEP

    49152:TSxosGgMLBfPxuvwvbTzzNNeICqMCF9g8yUyPzeljVJb6nHAiBvfP:TSx3GggBg4vHPNNBCqM+bv8CLfiBf

Malware Config

Signatures

  • ISR Stealer

    ISR Stealer is a modified version of Hackhound Stealer written in visual basic.

  • ISR Stealer payload 4 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 7 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 25 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\fd8aea8afeba8a171afc6b81a9c0a418be0b90c7a8cffccb3f1712333377191a.exe
    "C:\Users\Admin\AppData\Local\Temp\fd8aea8afeba8a171afc6b81a9c0a418be0b90c7a8cffccb3f1712333377191a.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1784
    • C:\Users\Admin\AppData\Local\Temp\RarSFX0\explorer.exe
      "C:\Users\Admin\AppData\Local\Temp\RarSFX0\explorer.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Drops file in Windows directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2040
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\AppLaunch.exe
        C:\Windows\Microsoft.NET\Framework\v2.0.50727\AppLaunch.exe
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of SetWindowsHookEx
        PID:1336
    • C:\Users\Admin\AppData\Local\Temp\RarSFX0\WinRAR411.exe
      "C:\Users\Admin\AppData\Local\Temp\RarSFX0\WinRAR411.exe"
      2⤵
      • Executes dropped EXE
      • Modifies Internet Explorer settings
      • Suspicious use of SetWindowsHookEx
      PID:1580

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\RarSFX0\WinRAR411.exe

    Filesize

    2.1MB

    MD5

    c1e7623669d68d43037419e602f2c238

    SHA1

    2451c4d95a59d25a933662ad0dcb82eb2772d8e1

    SHA256

    f1be8608f5324b0ef37384d735850d374c1aebf1c2a5c924d57d981f442c7730

    SHA512

    80a6a1371b3cdd16b22e0c7eac10973df008f0fcc035db6b0a23afee8943e9cffb71c6a4ad7765326f6f19c8d5a4851bf99648c323a403fb7a2cc60155d6d4f7

  • C:\Users\Admin\AppData\Local\Temp\RarSFX0\WinRAR411.exe

    Filesize

    2.1MB

    MD5

    c1e7623669d68d43037419e602f2c238

    SHA1

    2451c4d95a59d25a933662ad0dcb82eb2772d8e1

    SHA256

    f1be8608f5324b0ef37384d735850d374c1aebf1c2a5c924d57d981f442c7730

    SHA512

    80a6a1371b3cdd16b22e0c7eac10973df008f0fcc035db6b0a23afee8943e9cffb71c6a4ad7765326f6f19c8d5a4851bf99648c323a403fb7a2cc60155d6d4f7

  • C:\Users\Admin\AppData\Local\Temp\RarSFX0\explorer.exe

    Filesize

    159KB

    MD5

    c74cae46f9e11aa24c9dd901b69bc3aa

    SHA1

    adc3fbb03b059eb07a038c707f9ab449366296f7

    SHA256

    d9bf94a7c82eca74cca5b512c08e43d87aa5dd50da36cfc2586764013ee813c9

    SHA512

    37e2e3f8ec95e7ba8f32d0816f023ae916dc103cc086f44db2974b636dc18e88c2715c176012133ec9a747979e02a21d402b6f60547a36695e8701a177642e4d

  • C:\Users\Admin\AppData\Local\Temp\RarSFX0\explorer.exe

    Filesize

    159KB

    MD5

    c74cae46f9e11aa24c9dd901b69bc3aa

    SHA1

    adc3fbb03b059eb07a038c707f9ab449366296f7

    SHA256

    d9bf94a7c82eca74cca5b512c08e43d87aa5dd50da36cfc2586764013ee813c9

    SHA512

    37e2e3f8ec95e7ba8f32d0816f023ae916dc103cc086f44db2974b636dc18e88c2715c176012133ec9a747979e02a21d402b6f60547a36695e8701a177642e4d

  • \Users\Admin\AppData\Local\Temp\RarSFX0\WinRAR411.exe

    Filesize

    2.1MB

    MD5

    c1e7623669d68d43037419e602f2c238

    SHA1

    2451c4d95a59d25a933662ad0dcb82eb2772d8e1

    SHA256

    f1be8608f5324b0ef37384d735850d374c1aebf1c2a5c924d57d981f442c7730

    SHA512

    80a6a1371b3cdd16b22e0c7eac10973df008f0fcc035db6b0a23afee8943e9cffb71c6a4ad7765326f6f19c8d5a4851bf99648c323a403fb7a2cc60155d6d4f7

  • \Users\Admin\AppData\Local\Temp\RarSFX0\WinRAR411.exe

    Filesize

    2.1MB

    MD5

    c1e7623669d68d43037419e602f2c238

    SHA1

    2451c4d95a59d25a933662ad0dcb82eb2772d8e1

    SHA256

    f1be8608f5324b0ef37384d735850d374c1aebf1c2a5c924d57d981f442c7730

    SHA512

    80a6a1371b3cdd16b22e0c7eac10973df008f0fcc035db6b0a23afee8943e9cffb71c6a4ad7765326f6f19c8d5a4851bf99648c323a403fb7a2cc60155d6d4f7

  • \Users\Admin\AppData\Local\Temp\RarSFX0\WinRAR411.exe

    Filesize

    2.1MB

    MD5

    c1e7623669d68d43037419e602f2c238

    SHA1

    2451c4d95a59d25a933662ad0dcb82eb2772d8e1

    SHA256

    f1be8608f5324b0ef37384d735850d374c1aebf1c2a5c924d57d981f442c7730

    SHA512

    80a6a1371b3cdd16b22e0c7eac10973df008f0fcc035db6b0a23afee8943e9cffb71c6a4ad7765326f6f19c8d5a4851bf99648c323a403fb7a2cc60155d6d4f7

  • \Users\Admin\AppData\Local\Temp\RarSFX0\explorer.exe

    Filesize

    159KB

    MD5

    c74cae46f9e11aa24c9dd901b69bc3aa

    SHA1

    adc3fbb03b059eb07a038c707f9ab449366296f7

    SHA256

    d9bf94a7c82eca74cca5b512c08e43d87aa5dd50da36cfc2586764013ee813c9

    SHA512

    37e2e3f8ec95e7ba8f32d0816f023ae916dc103cc086f44db2974b636dc18e88c2715c176012133ec9a747979e02a21d402b6f60547a36695e8701a177642e4d

  • \Users\Admin\AppData\Local\Temp\RarSFX0\explorer.exe

    Filesize

    159KB

    MD5

    c74cae46f9e11aa24c9dd901b69bc3aa

    SHA1

    adc3fbb03b059eb07a038c707f9ab449366296f7

    SHA256

    d9bf94a7c82eca74cca5b512c08e43d87aa5dd50da36cfc2586764013ee813c9

    SHA512

    37e2e3f8ec95e7ba8f32d0816f023ae916dc103cc086f44db2974b636dc18e88c2715c176012133ec9a747979e02a21d402b6f60547a36695e8701a177642e4d

  • \Users\Admin\AppData\Local\Temp\RarSFX0\explorer.exe

    Filesize

    159KB

    MD5

    c74cae46f9e11aa24c9dd901b69bc3aa

    SHA1

    adc3fbb03b059eb07a038c707f9ab449366296f7

    SHA256

    d9bf94a7c82eca74cca5b512c08e43d87aa5dd50da36cfc2586764013ee813c9

    SHA512

    37e2e3f8ec95e7ba8f32d0816f023ae916dc103cc086f44db2974b636dc18e88c2715c176012133ec9a747979e02a21d402b6f60547a36695e8701a177642e4d

  • \Users\Admin\AppData\Local\Temp\RarSFX0\explorer.exe

    Filesize

    159KB

    MD5

    c74cae46f9e11aa24c9dd901b69bc3aa

    SHA1

    adc3fbb03b059eb07a038c707f9ab449366296f7

    SHA256

    d9bf94a7c82eca74cca5b512c08e43d87aa5dd50da36cfc2586764013ee813c9

    SHA512

    37e2e3f8ec95e7ba8f32d0816f023ae916dc103cc086f44db2974b636dc18e88c2715c176012133ec9a747979e02a21d402b6f60547a36695e8701a177642e4d

  • memory/1336-64-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/1336-65-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/1336-67-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/1336-68-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/1336-75-0x0000000000401000-0x0000000000412000-memory.dmp

    Filesize

    68KB

  • memory/1784-54-0x00000000762F1000-0x00000000762F3000-memory.dmp

    Filesize

    8KB

  • memory/2040-77-0x0000000074910000-0x0000000074EBB000-memory.dmp

    Filesize

    5.7MB

  • memory/2040-76-0x0000000074910000-0x0000000074EBB000-memory.dmp

    Filesize

    5.7MB

  • memory/2040-63-0x0000000074910000-0x0000000074EBB000-memory.dmp

    Filesize

    5.7MB