Analysis

  • max time kernel
    28s
  • max time network
    29s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    22-02-2021 14:14

General

  • Target

    8c24f4757a7100d4320e848023ca9f4c.exe

  • Size

    640KB

  • MD5

    8c24f4757a7100d4320e848023ca9f4c

  • SHA1

    26c1c6d789037cfb335dd5635617ef013fa4c4cd

  • SHA256

    94651db17b9e3921ba9e4484b848bfc920f6a1d451d6a2a5fe3ca9bc386d7c29

  • SHA512

    6ea825bda92097c2d8834442566886e560dbbeaa7c5f83ce630cc19415f12c3c751f3c947acebcbc41c5da78c6bfc5a5c4113bda8488d9c176d24b25ed644db7

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\8c24f4757a7100d4320e848023ca9f4c.exe
    "C:\Users\Admin\AppData\Local\Temp\8c24f4757a7100d4320e848023ca9f4c.exe"
    1⤵
    • Loads dropped DLL
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:744
    • 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:1748

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

    f556302aa8c3dd96773e666347d9f476

    SHA1

    5290063b66db2064d55d4ee36acae20b2b6a6044

    SHA256

    6fc478619e492f7c687bdff2235a57206f867c0601e22301480202a9c0ceb16b

    SHA512

    82a61676b07373cb885af0c9552020c27a6e0b90bd4c5788319276db4231185b7739eeef6e24b877825722fd67716630c3007bc8c0bcb807555e46b19c151e4d

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

    f556302aa8c3dd96773e666347d9f476

    SHA1

    5290063b66db2064d55d4ee36acae20b2b6a6044

    SHA256

    6fc478619e492f7c687bdff2235a57206f867c0601e22301480202a9c0ceb16b

    SHA512

    82a61676b07373cb885af0c9552020c27a6e0b90bd4c5788319276db4231185b7739eeef6e24b877825722fd67716630c3007bc8c0bcb807555e46b19c151e4d

  • memory/744-3-0x0000000075E51000-0x0000000075E53000-memory.dmp
    Filesize

    8KB

  • memory/744-4-0x00000000008A0000-0x000000000096F000-memory.dmp
    Filesize

    828KB

  • memory/744-5-0x0000000000400000-0x00000000004D5000-memory.dmp
    Filesize

    852KB

  • memory/744-2-0x0000000000B20000-0x0000000000B31000-memory.dmp
    Filesize

    68KB

  • memory/1252-6-0x000007FEF7590000-0x000007FEF780A000-memory.dmp
    Filesize

    2.5MB

  • memory/1748-10-0x0000000000CC0000-0x0000000000CD1000-memory.dmp
    Filesize

    68KB

  • memory/1748-8-0x0000000000000000-mapping.dmp
  • memory/1748-11-0x0000000002250000-0x0000000002261000-memory.dmp
    Filesize

    68KB

  • memory/1748-12-0x0000000073E70000-0x000000007455E000-memory.dmp
    Filesize

    6.9MB

  • memory/1748-13-0x0000000002470000-0x0000000002499000-memory.dmp
    Filesize

    164KB

  • memory/1748-15-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/1748-16-0x0000000004DA1000-0x0000000004DA2000-memory.dmp
    Filesize

    4KB

  • memory/1748-14-0x0000000000230000-0x0000000000265000-memory.dmp
    Filesize

    212KB

  • memory/1748-17-0x0000000004DA2000-0x0000000004DA3000-memory.dmp
    Filesize

    4KB

  • memory/1748-18-0x0000000004DA3000-0x0000000004DA4000-memory.dmp
    Filesize

    4KB

  • memory/1748-19-0x00000000024A0000-0x00000000024C7000-memory.dmp
    Filesize

    156KB

  • memory/1748-20-0x0000000004DA4000-0x0000000004DA6000-memory.dmp
    Filesize

    8KB