Analysis

  • max time kernel
    1807s
  • max time network
    1820s
  • platform
    windows10_x64
  • resource
    win10-ja-20210920
  • submitted
    22-10-2021 14:39

General

  • Target

    Fri05f84fa77402bf.exe

  • Size

    394KB

  • MD5

    8e0abf31bbb7005be2893af10fcceaa9

  • SHA1

    a48259c2346d7aed8cf14566d066695a8c2db55c

  • SHA256

    2df6cc430475ae053ad2772a3a9d1de1a03af31c3ebfdd0e5d5bd7fbdc61866a

  • SHA512

    ba76470f4896e6bdac508e6a901b352a3bf731ab5680b9931cc1a8c874482cf0c19a374a6a58dda5237178c1861509529a5174bf76fa768efac7989dbc1c1970

Malware Config

Extracted

Family

redline

Botnet

ChrisNEW

C2

194.104.136.5:46013

Signatures

  • RedLine

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

  • RedLine Payload 2 IoCs
  • Registers COM server for autorun 1 TTPs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • 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
  • Drops file in System32 directory 4 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Windows directory 3 IoCs
  • Modifies Internet Explorer settings 1 TTPs 3 IoCs
  • Modifies data under HKEY_USERS 23 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 11 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Fri05f84fa77402bf.exe
    "C:\Users\Admin\AppData\Local\Temp\Fri05f84fa77402bf.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4900
    • C:\Users\Admin\AppData\Local\Temp\Fri05f84fa77402bf.exe
      C:\Users\Admin\AppData\Local\Temp\Fri05f84fa77402bf.exe
      2⤵
        PID:652
      • C:\Users\Admin\AppData\Local\Temp\Fri05f84fa77402bf.exe
        C:\Users\Admin\AppData\Local\Temp\Fri05f84fa77402bf.exe
        2⤵
        • Checks computer location settings
        • Suspicious use of AdjustPrivilegeToken
        PID:1012
    • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdge.exe
      "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdge.exe" -ServerName:MicrosoftEdge.AppXdnhjhccw3zf0j06tkg3jtqr00qdm0khc.mca
      1⤵
      • Drops file in Windows directory
      • Modifies Internet Explorer settings
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:5004
    • C:\Windows\system32\browser_broker.exe
      C:\Windows\system32\browser_broker.exe -Embedding
      1⤵
      • Modifies Internet Explorer settings
      PID:1368
    • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
      "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
      1⤵
      • Modifies registry class
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1272
    • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
      "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
      1⤵
      • Drops file in Windows directory
      • Modifies Internet Explorer settings
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      PID:2764
    • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
      "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
      1⤵
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      PID:3016
    • C:\Users\Admin\AppData\Local\Microsoft\OneDrive\21.196.0921.0007\FileSyncConfig.exe
      "C:\Users\Admin\AppData\Local\Microsoft\OneDrive\21.196.0921.0007\FileSyncConfig.exe"
      1⤵
      • Modifies registry class
      PID:3292
    • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
      "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
      1⤵
      • Modifies registry class
      PID:4472
    • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
      "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
      1⤵
      • Modifies registry class
      PID:1068
    • C:\Program Files\Common Files\Microsoft Shared\ClickToRun\OfficeC2RClient.exe
      "C:\Program Files\Common Files\Microsoft Shared\ClickToRun\OfficeC2RClient.exe" /frequentupdate SCHEDULEDTASK displaylevel=False
      1⤵
      • Drops file in System32 directory
      • Modifies data under HKEY_USERS
      • Suspicious use of SetWindowsHookEx
      PID:1668

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Registry Run Keys / Startup Folder

    1
    T1060

    Defense Evasion

    Modify Registry

    1
    T1112

    Credential Access

    Credentials in Files

    2
    T1081

    Discovery

    Query Registry

    2
    T1012

    System Information Discovery

    1
    T1082

    Collection

    Data from Local System

    2
    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\Fri05f84fa77402bf.exe.log
      MD5

      41fbed686f5700fc29aaccf83e8ba7fd

      SHA1

      5271bc29538f11e42a3b600c8dc727186e912456

      SHA256

      df4e9d012687cdabd15e86bf37be15d6c822e1f50dde530a02468f0006586437

      SHA512

      234b2235c1ced25810a4121c5eabcbf9f269e82c126a1adc363ee34478173f8b462e90eb53f5f11533641663350b90ec1e2360fd805b10c041fab12f4da7a034

    • memory/1012-131-0x0000000005830000-0x0000000005831000-memory.dmp
      Filesize

      4KB

    • memory/1012-135-0x0000000006400000-0x0000000006401000-memory.dmp
      Filesize

      4KB

    • memory/1012-130-0x00000000056E0000-0x00000000056E1000-memory.dmp
      Filesize

      4KB

    • memory/1012-143-0x0000000007B70000-0x0000000007B71000-memory.dmp
      Filesize

      4KB

    • memory/1012-124-0x0000000000400000-0x000000000041E000-memory.dmp
      Filesize

      120KB

    • memory/1012-125-0x0000000000418542-mapping.dmp
    • memory/1012-142-0x0000000007470000-0x0000000007471000-memory.dmp
      Filesize

      4KB

    • memory/1012-129-0x0000000005CF0000-0x0000000005CF1000-memory.dmp
      Filesize

      4KB

    • memory/1012-140-0x0000000006A60000-0x0000000006A61000-memory.dmp
      Filesize

      4KB

    • memory/1012-137-0x00000000065E0000-0x00000000065E1000-memory.dmp
      Filesize

      4KB

    • memory/1012-133-0x00000000056E0000-0x0000000005CE6000-memory.dmp
      Filesize

      6.0MB

    • memory/1012-132-0x0000000005760000-0x0000000005761000-memory.dmp
      Filesize

      4KB

    • memory/1012-134-0x00000000057A0000-0x00000000057A1000-memory.dmp
      Filesize

      4KB

    • memory/4900-121-0x0000000004A30000-0x0000000004A31000-memory.dmp
      Filesize

      4KB

    • memory/4900-120-0x0000000004A90000-0x0000000004A91000-memory.dmp
      Filesize

      4KB

    • memory/4900-122-0x0000000004B90000-0x0000000004B91000-memory.dmp
      Filesize

      4KB

    • memory/4900-128-0x00000000055C0000-0x00000000055C1000-memory.dmp
      Filesize

      4KB

    • memory/4900-123-0x00000000050C0000-0x00000000050C1000-memory.dmp
      Filesize

      4KB

    • memory/4900-118-0x0000000000240000-0x0000000000241000-memory.dmp
      Filesize

      4KB