Analysis

  • max time kernel
    150s
  • max time network
    91s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    25-02-2021 14:12

General

  • Target

    42c13b2a7baf59c6d0d6ee1ce3c0be78.exe

  • Size

    651KB

  • MD5

    42c13b2a7baf59c6d0d6ee1ce3c0be78

  • SHA1

    c4f5d427c8257547f642c5eb2dc7aab687825cc6

  • SHA256

    bef5636daa6cccce3b38d8d284de1cb1ad2cfb36cbcaede1c8f7478e706f1201

  • SHA512

    0418d7e28a56861a7742b83b70b0801902bb9680ca1cd9dfb068c7986986c23cc4a85554f970ff8c6c4095827e64140646387905c4e80f788b0e2ad47d8a5e7a

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\42c13b2a7baf59c6d0d6ee1ce3c0be78.exe
    "C:\Users\Admin\AppData\Local\Temp\42c13b2a7baf59c6d0d6ee1ce3c0be78.exe"
    1⤵
    • Loads dropped DLL
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:2008
    • 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:1960

Network

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

Install Root Certificate

1
T1130

Modify Registry

1
T1112

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

1
T1005

Command and Control

Web Service

1
T1102

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Roaming\paperships\noabu.exe
    MD5

    bdfdca6660e6fe6cabe4dcc397154975

    SHA1

    6e7130d78356acb749f11b60e10244ea9ba267a2

    SHA256

    3a77d697b35b9de741ac611c904aca942a17d4ac8f786f4f9b9532dec277a8f6

    SHA512

    f7dc745eecfa2f8df6fa54bd1c98333e3c27123dd02bdcc91f9e96950393169a906d611d260a6863b36f22e6fa00c9fdabdd6e2bd24e7aaed50d265b19e03327

  • \Users\Admin\AppData\Roaming\paperships\noabu.exe
    MD5

    bdfdca6660e6fe6cabe4dcc397154975

    SHA1

    6e7130d78356acb749f11b60e10244ea9ba267a2

    SHA256

    3a77d697b35b9de741ac611c904aca942a17d4ac8f786f4f9b9532dec277a8f6

    SHA512

    f7dc745eecfa2f8df6fa54bd1c98333e3c27123dd02bdcc91f9e96950393169a906d611d260a6863b36f22e6fa00c9fdabdd6e2bd24e7aaed50d265b19e03327

  • memory/1184-6-0x000007FEF5D50000-0x000007FEF5FCA000-memory.dmp
    Filesize

    2.5MB

  • memory/1960-10-0x0000000000A20000-0x0000000000A31000-memory.dmp
    Filesize

    68KB

  • memory/1960-15-0x0000000002440000-0x0000000002469000-memory.dmp
    Filesize

    164KB

  • memory/1960-20-0x0000000004D34000-0x0000000004D36000-memory.dmp
    Filesize

    8KB

  • memory/1960-8-0x0000000000000000-mapping.dmp
  • memory/1960-19-0x0000000004D33000-0x0000000004D34000-memory.dmp
    Filesize

    4KB

  • memory/1960-18-0x0000000004D32000-0x0000000004D33000-memory.dmp
    Filesize

    4KB

  • memory/1960-11-0x0000000002300000-0x0000000002311000-memory.dmp
    Filesize

    68KB

  • memory/1960-12-0x0000000000230000-0x0000000000265000-memory.dmp
    Filesize

    212KB

  • memory/1960-13-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/1960-14-0x00000000737C0000-0x0000000073EAE000-memory.dmp
    Filesize

    6.9MB

  • memory/1960-17-0x0000000004D31000-0x0000000004D32000-memory.dmp
    Filesize

    4KB

  • memory/1960-16-0x0000000002480000-0x00000000024A7000-memory.dmp
    Filesize

    156KB

  • memory/2008-5-0x0000000000400000-0x00000000004D5000-memory.dmp
    Filesize

    852KB

  • memory/2008-2-0x0000000000BA0000-0x0000000000BB1000-memory.dmp
    Filesize

    68KB

  • memory/2008-3-0x0000000075EA1000-0x0000000075EA3000-memory.dmp
    Filesize

    8KB

  • memory/2008-4-0x0000000000320000-0x00000000003EF000-memory.dmp
    Filesize

    828KB