Analysis

  • max time kernel
    27s
  • max time network
    26s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    15-02-2021 07:51

General

  • Target

    257a80920f0abf59d2b5183858a6a63d.exe

  • Size

    513KB

  • MD5

    257a80920f0abf59d2b5183858a6a63d

  • SHA1

    eca558643f2badf74efc7effce6449e9f248739a

  • SHA256

    be45f292f7ba042ff4bd2d532ba67c8203f0e23a1cdd06e45679161c2fd129c4

  • SHA512

    e5b5321fdb9abbfc9a4690b2b8d700e2dc08616b5ccde00f73234994ee8c349f3a9a753e4228c42b912e188fa8691555e47286eef56c645155c32091fee38f6e

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
  • Loads dropped DLL 1 IoCs
  • 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.

  • Modifies system certificate store 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\257a80920f0abf59d2b5183858a6a63d.exe
    "C:\Users\Admin\AppData\Local\Temp\257a80920f0abf59d2b5183858a6a63d.exe"
    1⤵
    • Loads dropped DLL
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:1340
    • C:\Users\Admin\AppData\Roaming\paperships\noabu.exe
      noabu.exe
      2⤵
      • Executes dropped EXE
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:756

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\paperships\noabu.exe

    MD5

    e9f2ded2b4be33b68f4d84e93df358bd

    SHA1

    a8f8dce913a1ea9c34d6325b9cc855a6d94e4d10

    SHA256

    e99ab798099b3c352427b7808b0a2c7e73854aaeb34001f17852e288af321f6c

    SHA512

    6b228430c543064062a40fd89a7cff6864394a49dc62d37ab5e67a2d8f44d4253377be695b786e60e771b7fb5c19fb867a7c942b664a8effbd985ef01652ddf8

  • \Users\Admin\AppData\Roaming\paperships\noabu.exe

    MD5

    e9f2ded2b4be33b68f4d84e93df358bd

    SHA1

    a8f8dce913a1ea9c34d6325b9cc855a6d94e4d10

    SHA256

    e99ab798099b3c352427b7808b0a2c7e73854aaeb34001f17852e288af321f6c

    SHA512

    6b228430c543064062a40fd89a7cff6864394a49dc62d37ab5e67a2d8f44d4253377be695b786e60e771b7fb5c19fb867a7c942b664a8effbd985ef01652ddf8

  • memory/756-12-0x0000000074300000-0x00000000749EE000-memory.dmp

    Filesize

    6.9MB

  • memory/756-18-0x00000000071C2000-0x00000000071C3000-memory.dmp

    Filesize

    4KB

  • memory/756-20-0x00000000071C4000-0x00000000071C6000-memory.dmp

    Filesize

    8KB

  • memory/756-19-0x00000000071C3000-0x00000000071C4000-memory.dmp

    Filesize

    4KB

  • memory/756-8-0x0000000000000000-mapping.dmp

  • memory/756-17-0x00000000071C1000-0x00000000071C2000-memory.dmp

    Filesize

    4KB

  • memory/756-10-0x0000000002FD0000-0x0000000002FE1000-memory.dmp

    Filesize

    68KB

  • memory/756-11-0x0000000004860000-0x0000000004871000-memory.dmp

    Filesize

    68KB

  • memory/756-13-0x0000000000230000-0x0000000000266000-memory.dmp

    Filesize

    216KB

  • memory/756-14-0x0000000000400000-0x0000000000439000-memory.dmp

    Filesize

    228KB

  • memory/756-16-0x0000000004750000-0x000000000477A000-memory.dmp

    Filesize

    168KB

  • memory/756-15-0x00000000003D0000-0x00000000003FC000-memory.dmp

    Filesize

    176KB

  • memory/1340-2-0x0000000002F90000-0x0000000002FA1000-memory.dmp

    Filesize

    68KB

  • memory/1340-5-0x0000000000400000-0x00000000004D5000-memory.dmp

    Filesize

    852KB

  • memory/1340-3-0x0000000076691000-0x0000000076693000-memory.dmp

    Filesize

    8KB

  • memory/1340-4-0x0000000002C00000-0x0000000002CCF000-memory.dmp

    Filesize

    828KB

  • memory/1576-6-0x000007FEF7D20000-0x000007FEF7F9A000-memory.dmp

    Filesize

    2.5MB