Analysis

  • max time kernel
    33s
  • max time network
    112s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    29-12-2020 07:29

General

  • Target

    29ef19d2703c302f2afd23f0f73d04d2.exe

  • Size

    594KB

  • MD5

    29ef19d2703c302f2afd23f0f73d04d2

  • SHA1

    a453645655b2324e856a488995008d7372937551

  • SHA256

    9303fce212e36780ea585709956a75464f3d6eaf2da9211f72ac718dad3e7e80

  • SHA512

    123f002c9ee45f5d03845d44ad9d58d1ebb8be3d69c48e16d980816d778fb14453c2cf9e6047460b3b10264b86d849d65ede0f9ef0e410be887f6e432673cfa8

Malware Config

Signatures

  • RedLine

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

  • RedLine Payload 2 IoCs
  • Executes dropped EXE 1 IoCs
  • UPX packed file 2 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • 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.

  • 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.

  • 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.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\29ef19d2703c302f2afd23f0f73d04d2.exe
    "C:\Users\Admin\AppData\Local\Temp\29ef19d2703c302f2afd23f0f73d04d2.exe"
    1⤵
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:3084
    • C:\Users\Admin\AppData\Roaming\leadentop\bestof.exe
      bestof.exe
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:200
      • C:\Windows\SysWOW64\cmd.exe
        "cmd.exe" /C ping 127.0.0.1 -n 3 > nul & del ""
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1136
        • C:\Windows\SysWOW64\PING.EXE
          ping 127.0.0.1 -n 3
          4⤵
          • Runs ping.exe
          PID:2032

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\leadentop\bestof.exe

    MD5

    75d6419dd436bd70086b6a5b1579853b

    SHA1

    f691633d53eef6acea8f5f5dc4a8d5432d3b3d02

    SHA256

    f09d143add8bd571bf78d5f5181122ba84c10eb9a6427d6f61279ffccf4bec69

    SHA512

    9af08954c0052533bb2eea078d0488455f928cb8f3aa53c6c4cbb9a3693058b45c385aa8fbca37f348cde0f5ff500a342021771775bb0a832d088eb645b3904d

  • C:\Users\Admin\AppData\Roaming\leadentop\bestof.exe

    MD5

    75d6419dd436bd70086b6a5b1579853b

    SHA1

    f691633d53eef6acea8f5f5dc4a8d5432d3b3d02

    SHA256

    f09d143add8bd571bf78d5f5181122ba84c10eb9a6427d6f61279ffccf4bec69

    SHA512

    9af08954c0052533bb2eea078d0488455f928cb8f3aa53c6c4cbb9a3693058b45c385aa8fbca37f348cde0f5ff500a342021771775bb0a832d088eb645b3904d

  • memory/200-14-0x0000000009B00000-0x0000000009B01000-memory.dmp

    Filesize

    4KB

  • memory/200-25-0x000000000BD00000-0x000000000BD01000-memory.dmp

    Filesize

    4KB

  • memory/200-15-0x0000000009500000-0x0000000009501000-memory.dmp

    Filesize

    4KB

  • memory/200-7-0x0000000004F77000-0x0000000004F78000-memory.dmp

    Filesize

    4KB

  • memory/200-8-0x0000000005460000-0x0000000005461000-memory.dmp

    Filesize

    4KB

  • memory/200-9-0x0000000006CE0000-0x0000000006CE1000-memory.dmp

    Filesize

    4KB

  • memory/200-10-0x0000000072A60000-0x000000007314E000-memory.dmp

    Filesize

    6.9MB

  • memory/200-11-0x0000000006DE0000-0x0000000006E04000-memory.dmp

    Filesize

    144KB

  • memory/200-12-0x0000000009600000-0x0000000009601000-memory.dmp

    Filesize

    4KB

  • memory/200-13-0x0000000009450000-0x0000000009472000-memory.dmp

    Filesize

    136KB

  • memory/200-24-0x000000000BAC0000-0x000000000BAC1000-memory.dmp

    Filesize

    4KB

  • memory/200-4-0x0000000000000000-mapping.dmp

  • memory/200-18-0x000000000A230000-0x000000000A231000-memory.dmp

    Filesize

    4KB

  • memory/200-17-0x0000000009590000-0x0000000009591000-memory.dmp

    Filesize

    4KB

  • memory/200-16-0x0000000009540000-0x0000000009541000-memory.dmp

    Filesize

    4KB

  • memory/200-19-0x000000000AF20000-0x000000000AF21000-memory.dmp

    Filesize

    4KB

  • memory/200-20-0x000000000B0F0000-0x000000000B0F1000-memory.dmp

    Filesize

    4KB

  • memory/200-21-0x000000000B730000-0x000000000B731000-memory.dmp

    Filesize

    4KB

  • memory/200-22-0x000000000B7D0000-0x000000000B7D1000-memory.dmp

    Filesize

    4KB

  • memory/200-23-0x000000000B860000-0x000000000B861000-memory.dmp

    Filesize

    4KB

  • memory/1136-26-0x0000000000000000-mapping.dmp

  • memory/2032-27-0x0000000000000000-mapping.dmp

  • memory/3084-3-0x0000000005570000-0x0000000005571000-memory.dmp

    Filesize

    4KB

  • memory/3084-2-0x00000000050AB000-0x00000000050AC000-memory.dmp

    Filesize

    4KB