Resubmissions

10-04-2024 02:17

240410-cqs4fafc2v 10

10-04-2024 02:17

240410-cqsgxabh56 10

10-04-2024 02:17

240410-cqrwdabh54 10

10-04-2024 02:17

240410-cqrklsbh53 10

13-05-2023 22:56

230513-2wtplahg95 10

Analysis

  • max time kernel
    554s
  • max time network
    1199s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10-04-2024 02:17

General

  • Target

    qsteemp.exe

  • Size

    165KB

  • MD5

    90cd3202af31b431dcc5e47cf3b8c0d7

  • SHA1

    747f68fb8f122241059c219eeeeadac61e8215be

  • SHA256

    e76e206e8ae24f95a329b4f6ecdf1f22b76b07a8c628c0619b781bdba2d85732

  • SHA512

    b1025ca0dfa86cd6649337bfc6b555a9101fce38955566424955a6fe07782bea41eeaf4f233946eb6be5756b23398129bad98a87c6b07478f787df8bf3235481

  • SSDEEP

    3072:fV6h5WXwyNUD44ykiQbGjlc/SGvjQtbGTl2MRMc:9AuwMPkhbGRc/T6A

Score
10/10

Malware Config

Extracted

Family

gurcu

C2

https://api.telegram.org/bot6209822134:AAHQxD-CI1YDVcNbXijXHlonsEUgv3dfYtg/sendMessage?chat_id=-1001529292045

Signatures

  • Gurcu, WhiteSnake

    Gurcu is a malware stealer written in C#.

  • Checks computer location settings 2 TTPs 12 IoCs

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

  • Executes dropped EXE 22 IoCs
  • Reads WinSCP keys stored on the system 2 TTPs

    Tries to access WinSCP stored sessions.

  • Reads user/profile data of web browsers 2 TTPs

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

  • 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).

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 11 IoCs
  • Suspicious use of WriteProcessMemory 34 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\qsteemp.exe
    "C:\Users\Admin\AppData\Local\Temp\qsteemp.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1260
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "qsteemp" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\qsteemp.exe" &&START "" "C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3312
      • C:\Windows\system32\chcp.com
        chcp 65001
        3⤵
          PID:4048
        • C:\Windows\system32\PING.EXE
          ping 127.0.0.1
          3⤵
          • Runs ping.exe
          PID:1640
        • C:\Windows\system32\schtasks.exe
          schtasks /create /tn "qsteemp" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe" /rl HIGHEST /f
          3⤵
          • Creates scheduled task(s)
          PID:5064
        • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
          "C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe"
          3⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2340
          • C:\Windows\System32\tar.exe
            "C:\Windows\System32\tar.exe" -xvzf "C:\Users\Admin\AppData\Local\Temp\tmp42D5.tmp" -C "C:\Users\Admin\AppData\Local\6kfrvwd31o"
            4⤵
              PID:3960
            • C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe
              "C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt"
              4⤵
              • Executes dropped EXE
              PID:1816
      • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        1⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:4108
        • C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe
          "C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:3484
      • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        1⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:4248
        • C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe
          "C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:1000
      • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        1⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:4648
        • C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe
          "C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:2216
      • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        1⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:5076
        • C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe
          "C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:4356
      • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        1⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:4248
        • C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe
          "C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:3792
      • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        1⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2176
        • C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe
          "C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:2852
      • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        1⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:5028
        • C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe
          "C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:4840
      • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        1⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:932
        • C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe
          "C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:1160
      • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        1⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1696
        • C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe
          "C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:2212
      • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        1⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1448
        • C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe
          "C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:3140

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\6kfrvwd31o\data\cached-microdesc-consensus.tmp

        Filesize

        2.7MB

        MD5

        814f8cba43d923834b0d0027591e52bf

        SHA1

        2814b4faa0221b252164fbf9586051c07faa050f

        SHA256

        406d96a4788b07a0c4bda0e289d04472bc92a13f3b5b51e7478d095986735597

        SHA512

        45d866ec699d731eb7a50669bfa2fb469652b92d92b4546d373777192bff9d2201095ec9e13079ff422b4a7a15175142aa7d2abb57aaf4262b3e837340677069

      • C:\Users\Admin\AppData\Local\6kfrvwd31o\data\cached-microdescs.new

        Filesize

        8.9MB

        MD5

        da4c7506eb5e13de62d2deb35e2f5cb4

        SHA1

        5f3fbea8ad5b10cff3a5402e4c93aae0f8f83987

        SHA256

        ab4fa96922a1b04664b657367c3dae7b2fef7f7eec15444186aa0fedb801e208

        SHA512

        a50d5e3775ed9e967d3eeb271f19725bd9b82c6bf47806ddb8eb1b06e11a850b9285dfeadc7f8240cf70827c08760156de9d853945568cbd1fea0cdb59278980

      • C:\Users\Admin\AppData\Local\6kfrvwd31o\host\hostname

        Filesize

        64B

        MD5

        6cfbf5bfa41a586b47e69ac808eb2fc3

        SHA1

        1c454bb3a0bc144802f55d7e8f2d3842502706fa

        SHA256

        c771b1a87a47b2c4e89d524c293e75578dc9cebdceb10ddfeeb7f342dce4e2f1

        SHA512

        469f10fe19242271a6ecb193566d66da979464173006e63dc15c64fcd36a7a37bda40deea1dd4c99697b3821202696e4d0d00292820ce97589938b92b059a92c

      • C:\Users\Admin\AppData\Local\6kfrvwd31o\port.dat

        Filesize

        4B

        MD5

        39dd987a9d27f1045aa0ad3ed5995dd2

        SHA1

        20035669ad7aa73c1c0a0b590bda0aed031de80e

        SHA256

        a360748ed90aa02c3f79827f821595e497abbd2ea092c7d8fe852ddcb1008393

        SHA512

        bcb35cee4c138b7623dcbf3703a4423ef37ac0c3d14c9df2ea5e173d2f2b7915051dcfe9b603c7729a8b0020c2f103a7c789bec29e303320bcec6aa43470629b

      • C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe

        Filesize

        7.4MB

        MD5

        88590909765350c0d70c6c34b1f31dd2

        SHA1

        129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

        SHA256

        46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

        SHA512

        a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

      • C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt

        Filesize

        218B

        MD5

        3f7c8ad2dadc8cacccb63c2963b30831

        SHA1

        4cf18b67aad16abe15031df53a29017c16dab2c8

        SHA256

        660d849093d96a17c39de0e0bb69464110a36b710edb5dbb3ab5fdda266ff01a

        SHA512

        ae656f352077695ff4419f237cfb368dfe1905ff89f3879d2d9d8c0db75071ab8e51065d3cb89ebc66acf1a1d087feb0a0e5599cf6daeed4647a49506f7d9482

      • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\qsteemp.exe.log

        Filesize

        1KB

        MD5

        fc1be6f3f52d5c841af91f8fc3f790cb

        SHA1

        ac79b4229e0a0ce378ae22fc6104748c5f234511

        SHA256

        6da862f7c7feffca99cd58712ece93928c6ca6aed617f5d8c10a4718eaa2a910

        SHA512

        2f46165017309ee1a0c1b23e30a71e52e86ad8933e2649bf58c3f4628c5aa75659f5b8f6be32c2882f220b2f3ff2fd50d8766bf0a3708c94c2c634c051a05ea6

      • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe

        Filesize

        165KB

        MD5

        90cd3202af31b431dcc5e47cf3b8c0d7

        SHA1

        747f68fb8f122241059c219eeeeadac61e8215be

        SHA256

        e76e206e8ae24f95a329b4f6ecdf1f22b76b07a8c628c0619b781bdba2d85732

        SHA512

        b1025ca0dfa86cd6649337bfc6b555a9101fce38955566424955a6fe07782bea41eeaf4f233946eb6be5756b23398129bad98a87c6b07478f787df8bf3235481

      • C:\Users\Admin\AppData\Local\Temp\tmp42D5.tmp

        Filesize

        13.3MB

        MD5

        89d2d5811c1aff539bb355f15f3ddad0

        SHA1

        5bb3577c25b6d323d927200c48cd184a3e27c873

        SHA256

        b630008f6d3887793d48b87091e56691e292894dd4fa100dc4a418a2f29dcc12

        SHA512

        39e576124c54143520c5435a2ef9b24506131e13403489c0692f09b89135015d611c4988d4772f8a1e6557fa68b4667d467334461009cee8c2227dfc3e295289

      • memory/932-154-0x00007FFBF3FA0000-0x00007FFBF4A61000-memory.dmp

        Filesize

        10.8MB

      • memory/932-151-0x00007FFBF3FA0000-0x00007FFBF4A61000-memory.dmp

        Filesize

        10.8MB

      • memory/932-152-0x000001F9E5C10000-0x000001F9E5C20000-memory.dmp

        Filesize

        64KB

      • memory/1260-6-0x00007FFBF5960000-0x00007FFBF6421000-memory.dmp

        Filesize

        10.8MB

      • memory/1260-1-0x00007FFBF5960000-0x00007FFBF6421000-memory.dmp

        Filesize

        10.8MB

      • memory/1260-0-0x00000177CBB30000-0x00000177CBB60000-memory.dmp

        Filesize

        192KB

      • memory/1260-2-0x00000177CBFD0000-0x00000177CBFE0000-memory.dmp

        Filesize

        64KB

      • memory/1448-177-0x0000026B62E30000-0x0000026B62E40000-memory.dmp

        Filesize

        64KB

      • memory/1448-176-0x00007FFBF3FA0000-0x00007FFBF4A61000-memory.dmp

        Filesize

        10.8MB

      • memory/1696-162-0x00007FFBF3FA0000-0x00007FFBF4A61000-memory.dmp

        Filesize

        10.8MB

      • memory/1696-160-0x00007FFBF3FA0000-0x00007FFBF4A61000-memory.dmp

        Filesize

        10.8MB

      • memory/2176-133-0x00007FFBF3FA0000-0x00007FFBF4A61000-memory.dmp

        Filesize

        10.8MB

      • memory/2176-134-0x000001F2403E0000-0x000001F2403F0000-memory.dmp

        Filesize

        64KB

      • memory/2176-136-0x00007FFBF3FA0000-0x00007FFBF4A61000-memory.dmp

        Filesize

        10.8MB

      • memory/2340-12-0x0000022F4B2A0000-0x0000022F4B2B0000-memory.dmp

        Filesize

        64KB

      • memory/2340-11-0x00007FFBF3FA0000-0x00007FFBF4A61000-memory.dmp

        Filesize

        10.8MB

      • memory/2340-55-0x00007FFBF3FA0000-0x00007FFBF4A61000-memory.dmp

        Filesize

        10.8MB

      • memory/2340-62-0x0000022F4B2A0000-0x0000022F4B2B0000-memory.dmp

        Filesize

        64KB

      • memory/4108-49-0x00007FFBF3FA0000-0x00007FFBF4A61000-memory.dmp

        Filesize

        10.8MB

      • memory/4108-50-0x000001C5444B0000-0x000001C5444C0000-memory.dmp

        Filesize

        64KB

      • memory/4108-53-0x00007FFBF3FA0000-0x00007FFBF4A61000-memory.dmp

        Filesize

        10.8MB

      • memory/4248-81-0x00007FFBF3FA0000-0x00007FFBF4A61000-memory.dmp

        Filesize

        10.8MB

      • memory/4248-121-0x00000232F4E60000-0x00000232F4E70000-memory.dmp

        Filesize

        64KB

      • memory/4248-82-0x00000233E34B0000-0x00000233E34C0000-memory.dmp

        Filesize

        64KB

      • memory/4248-120-0x00007FFBF3FA0000-0x00007FFBF4A61000-memory.dmp

        Filesize

        10.8MB

      • memory/4248-84-0x00007FFBF3FA0000-0x00007FFBF4A61000-memory.dmp

        Filesize

        10.8MB

      • memory/4248-123-0x00007FFBF3FA0000-0x00007FFBF4A61000-memory.dmp

        Filesize

        10.8MB

      • memory/4648-101-0x00007FFBF3FA0000-0x00007FFBF4A61000-memory.dmp

        Filesize

        10.8MB

      • memory/4648-98-0x00007FFBF3FA0000-0x00007FFBF4A61000-memory.dmp

        Filesize

        10.8MB

      • memory/4648-99-0x00000277E54B0000-0x00000277E54C0000-memory.dmp

        Filesize

        64KB

      • memory/5028-145-0x00007FFBF3FA0000-0x00007FFBF4A61000-memory.dmp

        Filesize

        10.8MB

      • memory/5028-143-0x0000013DD9C70000-0x0000013DD9C80000-memory.dmp

        Filesize

        64KB

      • memory/5028-142-0x00007FFBF3FA0000-0x00007FFBF4A61000-memory.dmp

        Filesize

        10.8MB

      • memory/5076-111-0x00007FFBF3FA0000-0x00007FFBF4A61000-memory.dmp

        Filesize

        10.8MB

      • memory/5076-112-0x0000026C06FE0000-0x0000026C06FF0000-memory.dmp

        Filesize

        64KB

      • memory/5076-114-0x00007FFBF3FA0000-0x00007FFBF4A61000-memory.dmp

        Filesize

        10.8MB