Analysis

  • max time kernel
    164s
  • max time network
    186s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    25/06/2022, 01:39

General

  • Target

    3fb79cd293ce64dcfd20d84df6db2d3c67869cde656bcbad684bb773f76c298f.exe

  • Size

    4.3MB

  • MD5

    2239fcbdac9582e1a379dc39ca1e4dd1

  • SHA1

    9f3b3a7126144c2e3195d073f385c34fa82cfb6b

  • SHA256

    3fb79cd293ce64dcfd20d84df6db2d3c67869cde656bcbad684bb773f76c298f

  • SHA512

    994688df44661ad342c97757212487cc30fe3a1241e1e05ad15f44a393d53f9bd8173cfbaf143c17c297eea6a052afe900c2199c3385abf636ac3f2aa0b5ee97

Malware Config

Signatures

  • CryptBot

    A C++ stealer distributed widely in bundle with other software.

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 2 IoCs
  • Blocklisted process makes network request 3 IoCs
  • Executes dropped EXE 2 IoCs
  • Checks BIOS information in registry 2 TTPs 4 IoCs

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

  • Identifies Wine through registry keys 2 TTPs 2 IoCs

    Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

  • Loads dropped DLL 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Checks installed software on the system 1 TTPs

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

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Drops file in Program Files directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of FindShellTrayWindow 12 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3fb79cd293ce64dcfd20d84df6db2d3c67869cde656bcbad684bb773f76c298f.exe
    "C:\Users\Admin\AppData\Local\Temp\3fb79cd293ce64dcfd20d84df6db2d3c67869cde656bcbad684bb773f76c298f.exe"
    1⤵
    • Loads dropped DLL
    • Drops file in Program Files directory
    • Suspicious use of WriteProcessMemory
    PID:2104
    • C:\Program Files (x86)\Sir\Air\Setup.exe
      "C:\Program Files (x86)\Sir\Air\Setup.exe"
      2⤵
      • Identifies VirtualBox via ACPI registry values (likely anti-VM)
      • Executes dropped EXE
      • Checks BIOS information in registry
      • Identifies Wine through registry keys
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      PID:3408
    • C:\Windows\SysWOW64\CScript.exe
      "C:\Windows\system32\CScript.exe" "C:\Program Files (x86)\Sir\Air\ipras.vbs" //e:vbscript //B //NOLOGO
      2⤵
      • Blocklisted process makes network request
      PID:3744
    • C:\Program Files (x86)\Sir\Air\Setupres.exe
      "C:\Program Files (x86)\Sir\Air\Setupres.exe"
      2⤵
      • Identifies VirtualBox via ACPI registry values (likely anti-VM)
      • Executes dropped EXE
      • Checks BIOS information in registry
      • Identifies Wine through registry keys
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: EnumeratesProcesses
      PID:3080

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Program Files (x86)\Sir\Air\Setup.exe

    Filesize

    2.2MB

    MD5

    41af7998ebb519e0a0ca9635a865be5d

    SHA1

    68a7613a8d4483efb67f3794c245420e0daf2f95

    SHA256

    f05dc2ebf5bebbe40f1698489b873adcbefa41c98afe544fa04fd1ded91c9189

    SHA512

    31af03c31f0568ae57aab30c3d320a5505f3106ffd02c19b9bb5c740f76af332b27d929fca715029bfd49f2a0f404643616f0f88ab4f115693949688112ac5bb

  • C:\Program Files (x86)\Sir\Air\Setup.exe

    Filesize

    2.2MB

    MD5

    41af7998ebb519e0a0ca9635a865be5d

    SHA1

    68a7613a8d4483efb67f3794c245420e0daf2f95

    SHA256

    f05dc2ebf5bebbe40f1698489b873adcbefa41c98afe544fa04fd1ded91c9189

    SHA512

    31af03c31f0568ae57aab30c3d320a5505f3106ffd02c19b9bb5c740f76af332b27d929fca715029bfd49f2a0f404643616f0f88ab4f115693949688112ac5bb

  • C:\Program Files (x86)\Sir\Air\Setupres.exe

    Filesize

    2.0MB

    MD5

    b00f36abdbc0edb4729ae72ed388e965

    SHA1

    a1bf243bda51006cf4c8b9ee1fdcffb206058973

    SHA256

    5e64432c3afc95cfda49aa9479fd66efb8d7ef9812a2acb3fa9a0f536a2e5db9

    SHA512

    8dd8e5d9d6ad4a5515ae178f27e4878ddab3b8cf8786177cac91719517a959fba30cc7d93eb0eff9d1d71d097dbbdf07684fd8b077e144927079db8b8d1f5bb3

  • C:\Program Files (x86)\Sir\Air\ipras.vbs

    Filesize

    126B

    MD5

    b802ff9244875f69db2fae0f78e92b10

    SHA1

    49385a89cd575894a29fbda969b99cc1f5cf8076

    SHA256

    a1b0cb16fb2ecd66fccf156024404801ad694056e8a596326c1b27b57d8eabe8

    SHA512

    609856415a7ae2b3e260f945f1c8a8d2a28884c202d37181bea948708918f24b42ae03f17dba1520fddc91b2f7a182b0b8f885f33ea6f81bb3ee4c72e4e9350e

  • C:\Users\Admin\AppData\Local\Temp\nslCA1C.tmp\UAC.dll

    Filesize

    14KB

    MD5

    adb29e6b186daa765dc750128649b63d

    SHA1

    160cbdc4cb0ac2c142d361df138c537aa7e708c9

    SHA256

    2f7f8fc05dc4fd0d5cda501b47e4433357e887bbfed7292c028d99c73b52dc08

    SHA512

    b28adcccf0c33660fecd6f95f28f11f793dc9988582187617b4c113fb4e6fdad4cf7694cd8c0300a477e63536456894d119741a940dda09b7df3ff0087a7eada

  • C:\Users\Admin\AppData\Local\Temp\nslCA1C.tmp\nsExec.dll

    Filesize

    6KB

    MD5

    132e6153717a7f9710dcea4536f364cd

    SHA1

    e39bc82c7602e6dd0797115c2bd12e872a5fb2ab

    SHA256

    d29afce2588d8dd7bb94c00ca91cac0e85b80ffa6b221f5ffcb83a2497228eb2

    SHA512

    9aeb0b3051ce07fb9f03dfee7cea4a5e423425e48cb538173bd2a167817f867a30bd4d27d07875f27ca00031745b24547030b7f146660b049fa717590f1c77e1

  • memory/3080-144-0x0000000000400000-0x000000000091E000-memory.dmp

    Filesize

    5.1MB

  • memory/3080-145-0x00000000776B0000-0x0000000077853000-memory.dmp

    Filesize

    1.6MB

  • memory/3080-146-0x0000000000400000-0x000000000091E000-memory.dmp

    Filesize

    5.1MB

  • memory/3080-147-0x0000000000400000-0x000000000091E000-memory.dmp

    Filesize

    5.1MB

  • memory/3080-148-0x0000000000400000-0x000000000091E000-memory.dmp

    Filesize

    5.1MB

  • memory/3408-138-0x00000000776B0000-0x0000000077853000-memory.dmp

    Filesize

    1.6MB

  • memory/3408-139-0x0000000000B30000-0x000000000104B000-memory.dmp

    Filesize

    5.1MB

  • memory/3408-140-0x00000000776B0000-0x0000000077853000-memory.dmp

    Filesize

    1.6MB

  • memory/3408-141-0x0000000000B30000-0x000000000104B000-memory.dmp

    Filesize

    5.1MB

  • memory/3408-136-0x0000000000B30000-0x000000000104B000-memory.dmp

    Filesize

    5.1MB