Overview

overview

10

Static

static

3

2026-08-03...ar.exe

windows10-2004-x64

10

2026-08-03...ar.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    148s
  • max time network
    153s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    03/08/2026, 12:16

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General

  • Target
    2026-08-03_1ab87a6ea341ef65253c8e0636ac72e2_cosmicduke_elex_redline-stealer_rhadamanthys_smoke-loader_stealc_tofsee_vidar.exe
  • Size 2.2MB
  • Sample260803-pfymdshc76
  • SHA256 f2bb79a023bada6dcef959c4bdb93176a1f68f0b71c2160544a081e1fbd97331
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
apt29aptcollectiondefense_evasiondiscoverycosmicdukespywarestealer

Malware Config

Signatures

  • Family: CosmicDuke,TinyBaron

    CosmicDuke aka TinyBaron is an information stealer used by the APT29 group.

    stealercosmicduke
  • Detects CosmicDuke or TinyBaron 3 IoCs
    stealeraptapt29
  • Executes dropped EXE 4 IoCs
  • Reads user/profile data of web browsers 3 TTPs

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

    spywarestealer
  • Accesses Microsoft Outlook profiles 1 TTPs 1 IoCs
    collection
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

    discovery
  • Enumerates connected drives 3 TTPs 42 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in System32 directory 16 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • Modifies Control Panel 5 IoCs
    defense_evasion
  • Modifies data under HKEY_USERS 12 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2026-08-03_1ab87a6ea341ef65253c8e0636ac72e2_cosmicduke_elex_redline-stealer_rhadamanthys_smoke-loader_stealc_tofsee_vidar.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-08-03_1ab87a6ea341ef65253c8e0636ac72e2_cosmicduke_elex_redline-stealer_rhadamanthys_smoke-loader_stealc_tofsee_vidar.exe"
    1⤵
    • Accesses Microsoft Outlook profiles
    • Enumerates connected drives
    • Drops file in System32 directory
    • System Location Discovery: System Language Discovery
    • Modifies Control Panel
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    • outlook_win_path
    PID:5532
    • C:\Windows\SysWOW64\systapi.exe
      C:\Windows\SysWOW64\systapi.exe /combine local system
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:5476
  • C:\Windows\SysWOW64\systapi.exe
    C:\Windows\SysWOW64\systapi.exe
    1⤵
    • Executes dropped EXE
    PID:5896
  • C:\Windows\SysWOW64\udffw.exe
    "C:\Windows\SysWOW64\udffw.exe" nwc
    1⤵
    • Executes dropped EXE
    • Enumerates connected drives
    • Drops file in System32 directory
    • System Location Discovery: System Language Discovery
    • Modifies data under HKEY_USERS
    • Suspicious use of AdjustPrivilegeToken
    PID:6004
  • C:\Windows\SysWOW64\udffw.exe
    C:\Windows\SysWOW64\udffw.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1184

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        libtapi.scr
        • Path C:\Users\Admin\AppData\Local\Temp\libtapi.scr
        • Size 3KB
        • SHA256 47f3405ab0da5af125bcc6ebb6d17a1573b090c54d7a0a00630ec170ccc4b9d1
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        ntuser{4CB43D7F-7DCA-4906-8698-FFFFFFFF8094E303}.pol
        • Path C:\Users\Public\Documents\ntuser{4CB43D7F-7DCA-4906-8698-FFFFFFFF8094E303}.pol
        • Size 4B
        • SHA256 443c07a2c83b7b0253a325d2b72ac757c3aa5b41cd749842bc74fb3ee9b26866
        • MD5 SHA1 SHA512
        Submit Download

        systapi.exe
        • Path C:\Windows\SysWOW64\systapi.exe
        • Size 1.0MB
        • SHA256 a154dd34266fea0878078895ff91adbc8225158289bc43480d3072544b610973
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        udffw.exe
        • Path C:\Windows\SysWOW64\udffw.exe
        • Size 2.2MB
        • SHA256 232a42541185a810b5562df7787bb09f22887fc20aa41297e31e8c6a837da5bb
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/1184-37-0x0000000000400000-0x00000000005AF000-memory.dmp
        Download

        memory/1184-80-0x0000000000400000-0x0000000000438000-memory.dmp
        Download

        memory/1184-78-0x0000000000400000-0x00000000005AF000-memory.dmp
        Download

        memory/1184-76-0x0000000000400000-0x00000000005AF000-memory.dmp
        Download

        memory/1184-75-0x0000000000400000-0x00000000005AF000-memory.dmp
        Download

        memory/1184-36-0x0000000000400000-0x00000000005AF000-memory.dmp
        Download

        memory/5532-4-0x0000000000400000-0x0000000000420000-memory.dmp
        Download

        memory/5532-0-0x0000000000400000-0x00000000005AF000-memory.dmp
        Download

        memory/5532-3-0x0000000002250000-0x0000000002298000-memory.dmp
        Download

        memory/5532-2-0x0000000000400000-0x00000000005AF000-memory.dmp
        Download

        memory/5532-1-0x0000000000400000-0x00000000005AF000-memory.dmp
        Download

        memory/6004-33-0x0000000000400000-0x00000000005AF000-memory.dmp
        Download

        memory/6004-31-0x0000000000400000-0x00000000005AF000-memory.dmp
        Download

        memory/6004-74-0x0000000000400000-0x00000000005AF000-memory.dmp
        Download