Analysis

  • max time kernel
    74s
  • max time network
    136s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    30-10-2020 19:35

General

  • Target

    76448bb2fbeda3e0e7c2befbb66ca778.exe

  • Size

    582KB

  • MD5

    76448bb2fbeda3e0e7c2befbb66ca778

  • SHA1

    9a8c6d78d5f67e2e79c198ece6da39f7fd898773

  • SHA256

    40e054c5c315d144c46e4caab2eb10d61f71c8f3cb97a85e81b96ce6a306463d

  • SHA512

    c8e1747f5c8a4979372b1cab52b0c0d09c98bba2cbacf24fac9ca0d6a419e64100169e03cb0c8e865ad72018910e624a69cee3b77f5e30bd8761a1c09fbca41e

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 2 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 2 IoCs

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

  • Suspicious use of SetThreadContext 1 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.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\76448bb2fbeda3e0e7c2befbb66ca778.exe
    "C:\Users\Admin\AppData\Local\Temp\76448bb2fbeda3e0e7c2befbb66ca778.exe"
    1⤵
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:540
    • C:\Users\Admin\AppData\Roaming\gfersesurity\bestof.exe
      bestof.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2608
      • C:\Users\Admin\AppData\Roaming\gfersesurity\bestof.exe
        "C:\Users\Admin\AppData\Roaming\gfersesurity\bestof.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2692
        • C:\Windows\SysWOW64\cmd.exe
          "cmd.exe" /C ping 127.0.0.1 -n 3 > nul & del "C:\Users\Admin\AppData\Roaming\gfersesurity\bestof.exe"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:2440
          • C:\Windows\SysWOW64\PING.EXE
            ping 127.0.0.1 -n 3
            5⤵
            • Runs ping.exe
            PID:8

Network

MITRE ATT&CK Matrix ATT&CK v6

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

Remote System Discovery

1
T1018

Collection

Data from Local System

1
T1005

Command and Control

Web Service

1
T1102

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\bestof.exe.log
    MD5

    605f809fab8c19729d39d075f7ffdb53

    SHA1

    c546f877c9bd53563174a90312a8337fdfc5fdd9

    SHA256

    6904d540649e76c55f99530b81be17e099184bb4cad415aa9b9b39cc3677f556

    SHA512

    82cc12c3186ae23884b8d5c104638c8206272c4389ade56b926dfc1d437b03888159b3c790b188b54d277a262e731927e703e680ea642e1417faee27443fd5b3

  • C:\Users\Admin\AppData\Roaming\gfersesurity\bestof.exe
    MD5

    ae71797ed71a11f172c9d03701ae88c7

    SHA1

    10a0cc04fbed99c4f0f1f908979455da6868f1eb

    SHA256

    0215f9dd19951e07aaa5ddfed10c4b46af716a8e3ce1ccb853f0992d14ee3e34

    SHA512

    7f6fa1d06268a9b1a3541f19f1a2636be3579d6bcb8eb6f54f53bfdd380f1a7150e32a61799aefec5b52b920e8b39213d5dacf8e24654559b1022f6fd51a5d77

  • C:\Users\Admin\AppData\Roaming\gfersesurity\bestof.exe
    MD5

    ae71797ed71a11f172c9d03701ae88c7

    SHA1

    10a0cc04fbed99c4f0f1f908979455da6868f1eb

    SHA256

    0215f9dd19951e07aaa5ddfed10c4b46af716a8e3ce1ccb853f0992d14ee3e34

    SHA512

    7f6fa1d06268a9b1a3541f19f1a2636be3579d6bcb8eb6f54f53bfdd380f1a7150e32a61799aefec5b52b920e8b39213d5dacf8e24654559b1022f6fd51a5d77

  • C:\Users\Admin\AppData\Roaming\gfersesurity\bestof.exe
    MD5

    ae71797ed71a11f172c9d03701ae88c7

    SHA1

    10a0cc04fbed99c4f0f1f908979455da6868f1eb

    SHA256

    0215f9dd19951e07aaa5ddfed10c4b46af716a8e3ce1ccb853f0992d14ee3e34

    SHA512

    7f6fa1d06268a9b1a3541f19f1a2636be3579d6bcb8eb6f54f53bfdd380f1a7150e32a61799aefec5b52b920e8b39213d5dacf8e24654559b1022f6fd51a5d77

  • memory/8-32-0x0000000000000000-mapping.dmp
  • memory/540-1-0x0000000002390000-0x0000000002391000-memory.dmp
    Filesize

    4KB

  • memory/540-0-0x00000000005FB000-0x00000000005FD000-memory.dmp
    Filesize

    8KB

  • memory/2440-31-0x0000000000000000-mapping.dmp
  • memory/2608-5-0x0000000072640000-0x0000000072D2E000-memory.dmp
    Filesize

    6.9MB

  • memory/2608-6-0x0000000000BD0000-0x0000000000BD1000-memory.dmp
    Filesize

    4KB

  • memory/2608-8-0x0000000005790000-0x00000000057CA000-memory.dmp
    Filesize

    232KB

  • memory/2608-9-0x0000000005750000-0x0000000005766000-memory.dmp
    Filesize

    88KB

  • memory/2608-2-0x0000000000000000-mapping.dmp
  • memory/2692-17-0x0000000005A80000-0x0000000005A81000-memory.dmp
    Filesize

    4KB

  • memory/2692-25-0x0000000007BD0000-0x0000000007BD1000-memory.dmp
    Filesize

    4KB

  • memory/2692-18-0x0000000005500000-0x0000000005501000-memory.dmp
    Filesize

    4KB

  • memory/2692-19-0x00000000054E0000-0x00000000054E1000-memory.dmp
    Filesize

    4KB

  • memory/2692-20-0x0000000005550000-0x0000000005551000-memory.dmp
    Filesize

    4KB

  • memory/2692-21-0x00000000057E0000-0x00000000057E1000-memory.dmp
    Filesize

    4KB

  • memory/2692-22-0x0000000006AA0000-0x0000000006AA1000-memory.dmp
    Filesize

    4KB

  • memory/2692-23-0x00000000071A0000-0x00000000071A1000-memory.dmp
    Filesize

    4KB

  • memory/2692-24-0x0000000006C70000-0x0000000006C71000-memory.dmp
    Filesize

    4KB

  • memory/2692-14-0x00000000736A0000-0x0000000073D8E000-memory.dmp
    Filesize

    6.9MB

  • memory/2692-26-0x0000000006D10000-0x0000000006D11000-memory.dmp
    Filesize

    4KB

  • memory/2692-27-0x0000000006D90000-0x0000000006D91000-memory.dmp
    Filesize

    4KB

  • memory/2692-28-0x0000000006F80000-0x0000000006F81000-memory.dmp
    Filesize

    4KB

  • memory/2692-29-0x0000000007720000-0x0000000007721000-memory.dmp
    Filesize

    4KB

  • memory/2692-30-0x0000000007B20000-0x0000000007B21000-memory.dmp
    Filesize

    4KB

  • memory/2692-11-0x000000000042064E-mapping.dmp
  • memory/2692-10-0x0000000000400000-0x0000000000426000-memory.dmp
    Filesize

    152KB