Analysis

  • max time kernel
    141s
  • max time network
    140s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    11-11-2020 00:36

General

  • Target

    keygen-step-2.exe

  • Size

    357KB

  • MD5

    8c4fe67a04fab5e6fc528d80fe934d92

  • SHA1

    2dda7f80ae96ba0afa427b8dac4661ee2195b0ac

  • SHA256

    ded9ced2ef59268364eed96c2403427c486cc8799c24bb38068d4bf69c486186

  • SHA512

    86f0a6b357dde692f49e9718032fa3e94ee9bda78d10262a1b00f054d1d9be4fa8734c1f46e630bce5cc5aa2eee09d0d2c2d4206be9abb5b5ab0abc0d6c9f614

Malware Config

Signatures

  • RedLine

    RedLine Stealer is a malware family written in C#, first appearing in early 2020.

  • RedLine Payload 4 IoCs
  • Executes dropped EXE 2 IoCs
  • Deletes itself 1 IoCs
  • 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 2 IoCs

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

  • Suspicious use of SetThreadContext 2 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.

  • Modifies system certificate store 2 TTPs 2 IoCs
  • Runs ping.exe 1 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 48 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\keygen-step-2.exe
    "C:\Users\Admin\AppData\Local\Temp\keygen-step-2.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Modifies system certificate store
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1068
    • C:\Users\Admin\AppData\Roaming\25D8.tmp.exe
      "C:\Users\Admin\AppData\Roaming\25D8.tmp.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:360
      • C:\Users\Admin\AppData\Roaming\25D8.tmp.exe
        "C:\Users\Admin\AppData\Roaming\25D8.tmp.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1608
        • C:\Windows\SysWOW64\cmd.exe
          "cmd.exe" /C ping 127.0.0.1 -n 3 > nul & del "C:\Users\Admin\AppData\Roaming\25D8.tmp.exe"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:928
          • C:\Windows\SysWOW64\PING.EXE
            ping 127.0.0.1 -n 3
            5⤵
            • Runs ping.exe
            PID:916
    • C:\Users\Admin\AppData\Local\Temp\keygen-step-2.exe
      "C:\Users\Admin\AppData\Local\Temp\keygen-step-2.exe"
      2⤵
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:1156
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c ping 127.0.0.1 && del "C:\Users\Admin\AppData\Local\Temp\keygen-step-2.exe" >> NUL
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:1356
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1
        3⤵
        • Runs ping.exe
        PID:1308

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\25D8.tmp.exe

    MD5

    71e27a77011a6d73b28a9403f23e39c7

    SHA1

    7e6122eb754e9c6a085ba38234c4e3e2a4ba72d5

    SHA256

    0f1bd85289b945b02326245f1d49fe90850ec82ed1694ff193eb862bae5f492e

    SHA512

    51ecaddcc2c19f2ec84a7843902f3c0c1ddc9c6cbf45cc1d95d468045d65bf8582c75d2a8a8192f067c4bbf1db8c3a7f20e31f1db55e02e58f1501d522e07dec

  • C:\Users\Admin\AppData\Roaming\25D8.tmp.exe

    MD5

    71e27a77011a6d73b28a9403f23e39c7

    SHA1

    7e6122eb754e9c6a085ba38234c4e3e2a4ba72d5

    SHA256

    0f1bd85289b945b02326245f1d49fe90850ec82ed1694ff193eb862bae5f492e

    SHA512

    51ecaddcc2c19f2ec84a7843902f3c0c1ddc9c6cbf45cc1d95d468045d65bf8582c75d2a8a8192f067c4bbf1db8c3a7f20e31f1db55e02e58f1501d522e07dec

  • C:\Users\Admin\AppData\Roaming\25D8.tmp.exe

    MD5

    71e27a77011a6d73b28a9403f23e39c7

    SHA1

    7e6122eb754e9c6a085ba38234c4e3e2a4ba72d5

    SHA256

    0f1bd85289b945b02326245f1d49fe90850ec82ed1694ff193eb862bae5f492e

    SHA512

    51ecaddcc2c19f2ec84a7843902f3c0c1ddc9c6cbf45cc1d95d468045d65bf8582c75d2a8a8192f067c4bbf1db8c3a7f20e31f1db55e02e58f1501d522e07dec

  • \Users\Admin\AppData\Roaming\25D8.tmp.exe

    MD5

    71e27a77011a6d73b28a9403f23e39c7

    SHA1

    7e6122eb754e9c6a085ba38234c4e3e2a4ba72d5

    SHA256

    0f1bd85289b945b02326245f1d49fe90850ec82ed1694ff193eb862bae5f492e

    SHA512

    51ecaddcc2c19f2ec84a7843902f3c0c1ddc9c6cbf45cc1d95d468045d65bf8582c75d2a8a8192f067c4bbf1db8c3a7f20e31f1db55e02e58f1501d522e07dec

  • \Users\Admin\AppData\Roaming\25D8.tmp.exe

    MD5

    71e27a77011a6d73b28a9403f23e39c7

    SHA1

    7e6122eb754e9c6a085ba38234c4e3e2a4ba72d5

    SHA256

    0f1bd85289b945b02326245f1d49fe90850ec82ed1694ff193eb862bae5f492e

    SHA512

    51ecaddcc2c19f2ec84a7843902f3c0c1ddc9c6cbf45cc1d95d468045d65bf8582c75d2a8a8192f067c4bbf1db8c3a7f20e31f1db55e02e58f1501d522e07dec

  • memory/360-13-0x00000000009A0000-0x00000000009DD000-memory.dmp

    Filesize

    244KB

  • memory/360-6-0x0000000000800000-0x0000000000801000-memory.dmp

    Filesize

    4KB

  • memory/360-5-0x0000000073FD0000-0x00000000746BE000-memory.dmp

    Filesize

    6.9MB

  • memory/360-14-0x00000000005B0000-0x00000000005C6000-memory.dmp

    Filesize

    88KB

  • memory/360-2-0x0000000000000000-mapping.dmp

  • memory/888-0-0x000007FEF6460000-0x000007FEF66DA000-memory.dmp

    Filesize

    2.5MB

  • memory/916-25-0x0000000000000000-mapping.dmp

  • memory/928-24-0x0000000000000000-mapping.dmp

  • memory/1156-9-0x0000000000401480-mapping.dmp

  • memory/1156-8-0x0000000000400000-0x0000000000449000-memory.dmp

    Filesize

    292KB

  • memory/1156-10-0x0000000000400000-0x0000000000449000-memory.dmp

    Filesize

    292KB

  • memory/1308-12-0x0000000000000000-mapping.dmp

  • memory/1356-11-0x0000000000000000-mapping.dmp

  • memory/1608-19-0x0000000000400000-0x0000000000426000-memory.dmp

    Filesize

    152KB

  • memory/1608-20-0x0000000000400000-0x0000000000426000-memory.dmp

    Filesize

    152KB

  • memory/1608-21-0x0000000073FD0000-0x00000000746BE000-memory.dmp

    Filesize

    6.9MB

  • memory/1608-17-0x0000000000420906-mapping.dmp

  • memory/1608-16-0x0000000000400000-0x0000000000426000-memory.dmp

    Filesize

    152KB