Resubmissions

03-07-2024 14:31

240703-rvvkdsvbrr 10

21-06-2024 12:55

240621-p59e7azhmg 10

Analysis

  • max time kernel
    1781s
  • max time network
    1784s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03-07-2024 14:31

General

  • Target

    Nursultan.exe

  • Size

    1.4MB

  • MD5

    1b6293c7f0dfed044b0eba8b98b0faff

  • SHA1

    e5705cbb256bb0b1a350e1b9fb71c1a1e4ac605a

  • SHA256

    fe014092ae92e8372849bed9f5cf33946e8d918bdc50feddc1316bc837414ba8

  • SHA512

    694e9afd04089172c991a712849049545459ceeed99780a6f012ca086fa2d1b70bbd627534b85b1797f4be22feda55e46e6966fe96a2ee66effdeeaa2eb650a5

  • SSDEEP

    24576:d2G/nvxW3WckpJWjXbNQsVZy8v8BQSsZWcJ48z2AB4:dbA3wvW+sVZy8fZWmz9

Malware Config

Extracted

Family

44caliber

C2

https://discord.com/api/webhooks/1253689379948593173/lzPh5dDD7ETWYLRPMt2M_Ml82yS42YxolYTwBWldi4NXuLOvpMPhz7AlFtFln1RxcqaC

Signatures

  • 44Caliber

    An open source infostealer written in C#.

  • DcRat

    DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

  • Process spawned unexpected child process 21 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • DCRat payload 4 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Checks computer location settings 2 TTPs 4 IoCs

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

  • Executes dropped EXE 22 IoCs
  • Drops file in Program Files directory 8 IoCs
  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Modifies registry class 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 21 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 19 IoCs
  • Suspicious use of AdjustPrivilegeToken 21 IoCs
  • Suspicious use of WriteProcessMemory 15 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\Nursultan.exe
    "C:\Users\Admin\AppData\Local\Temp\Nursultan.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1872
    • C:\Users\Admin\AppData\Local\Temp\svchost.exe
      "C:\Users\Admin\AppData\Local\Temp\svchost.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:3988
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Hypercommon\s6qV8wojz3Yx3vhyfOAzGuFvxlJ5l.vbe"
        3⤵
        • Checks computer location settings
        • Suspicious use of WriteProcessMemory
        PID:3568
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /c ""C:\Hypercommon\Udwe1ynNPaETo.bat" "
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:864
          • C:\Hypercommon\ServercrtDll.exe
            "C:\Hypercommon\ServercrtDll.exe"
            5⤵
            • Checks computer location settings
            • Executes dropped EXE
            • Drops file in Program Files directory
            • Drops file in Windows directory
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:4508
            • C:\Program Files (x86)\Microsoft\Temp\StartMenuExperienceHost.exe
              "C:\Program Files (x86)\Microsoft\Temp\StartMenuExperienceHost.exe"
              6⤵
              • Executes dropped EXE
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:4052
    • C:\Users\Admin\AppData\Local\Temp\explorer.exe
      "C:\Users\Admin\AppData\Local\Temp\explorer.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4984
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Windows Photo Viewer\spoolsv.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:3552
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Photo Viewer\spoolsv.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4616
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Windows Photo Viewer\spoolsv.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:116
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smsss" /sc MINUTE /mo 11 /tr "'C:\Windows\PLA\Templates\smss.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4960
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Windows\PLA\Templates\smss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:540
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smsss" /sc MINUTE /mo 12 /tr "'C:\Windows\PLA\Templates\smss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2312
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smsss" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Microsoft\smss.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:3724
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft\smss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1508
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smsss" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Microsoft\smss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1812
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 14 /tr "'C:\Recovery\WindowsRE\wininit.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:3028
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\wininit.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:3712
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 14 /tr "'C:\Recovery\WindowsRE\wininit.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1660
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 11 /tr "'C:\Recovery\WindowsRE\System.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1052
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\System.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:448
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 13 /tr "'C:\Recovery\WindowsRE\System.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4416
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorere" /sc MINUTE /mo 10 /tr "'C:\Recovery\WindowsRE\explorer.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:3952
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\explorer.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4668
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorere" /sc MINUTE /mo 6 /tr "'C:\Recovery\WindowsRE\explorer.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:264
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "StartMenuExperienceHostS" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Microsoft\Temp\StartMenuExperienceHost.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:408
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "StartMenuExperienceHost" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft\Temp\StartMenuExperienceHost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2696
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "StartMenuExperienceHostS" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Microsoft\Temp\StartMenuExperienceHost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4608
  • C:\Recovery\WindowsRE\explorer.exe
    C:\Recovery\WindowsRE\explorer.exe
    1⤵
    • Executes dropped EXE
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:4024
  • C:\Program Files (x86)\Windows Photo Viewer\spoolsv.exe
    "C:\Program Files (x86)\Windows Photo Viewer\spoolsv.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:4368
  • C:\Program Files (x86)\Microsoft\smss.exe
    "C:\Program Files (x86)\Microsoft\smss.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:4920
  • C:\Program Files (x86)\Microsoft\Temp\StartMenuExperienceHost.exe
    "C:\Program Files (x86)\Microsoft\Temp\StartMenuExperienceHost.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:5064
  • C:\Recovery\WindowsRE\explorer.exe
    C:\Recovery\WindowsRE\explorer.exe
    1⤵
    • Executes dropped EXE
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:928
  • C:\Recovery\WindowsRE\System.exe
    C:\Recovery\WindowsRE\System.exe
    1⤵
    • Executes dropped EXE
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:2948
  • C:\Recovery\WindowsRE\wininit.exe
    C:\Recovery\WindowsRE\wininit.exe
    1⤵
    • Executes dropped EXE
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:2396
  • C:\Program Files (x86)\Windows Photo Viewer\spoolsv.exe
    "C:\Program Files (x86)\Windows Photo Viewer\spoolsv.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:4740
  • C:\Recovery\WindowsRE\explorer.exe
    C:\Recovery\WindowsRE\explorer.exe
    1⤵
    • Executes dropped EXE
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:2720
  • C:\Program Files (x86)\Microsoft\smss.exe
    "C:\Program Files (x86)\Microsoft\smss.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:3140
  • C:\Program Files (x86)\Microsoft\Temp\StartMenuExperienceHost.exe
    "C:\Program Files (x86)\Microsoft\Temp\StartMenuExperienceHost.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:4292
  • C:\Program Files (x86)\Windows Photo Viewer\spoolsv.exe
    "C:\Program Files (x86)\Windows Photo Viewer\spoolsv.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:3808
  • C:\Recovery\WindowsRE\explorer.exe
    C:\Recovery\WindowsRE\explorer.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:3532
  • C:\Recovery\WindowsRE\System.exe
    C:\Recovery\WindowsRE\System.exe
    1⤵
    • Executes dropped EXE
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:4640
  • C:\Recovery\WindowsRE\wininit.exe
    C:\Recovery\WindowsRE\wininit.exe
    1⤵
    • Executes dropped EXE
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:4344
  • C:\Program Files (x86)\Microsoft\smss.exe
    "C:\Program Files (x86)\Microsoft\smss.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:1524
  • C:\Recovery\WindowsRE\explorer.exe
    C:\Recovery\WindowsRE\explorer.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:2796
  • C:\Program Files (x86)\Microsoft\Temp\StartMenuExperienceHost.exe
    "C:\Program Files (x86)\Microsoft\Temp\StartMenuExperienceHost.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:3752

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Hypercommon\ServercrtDll.exe

    Filesize

    828KB

    MD5

    801d5740c780d09b1cc6d971ce8b280f

    SHA1

    c7188e6f5998405d9dcbe83ce5d29267861be07d

    SHA256

    b678bee38602b80df34f15e4555bb689e2eb6aef26f4c273d652c88f8825c33f

    SHA512

    3296e517a6e0d6d3feb1f9d1544664b87589130d8a28f205626b2182ecdf333ff404f311ce69730d509e3072432024d3ed16db7068d35925375d9ecc5fe82b49

  • C:\Hypercommon\Udwe1ynNPaETo.bat

    Filesize

    33B

    MD5

    1af82b77403306ff43f68bf7a0786c52

    SHA1

    730a3bd4b524ffa024657c1fc27ffd82e25f3f81

    SHA256

    e358e4c2fc541cc4e5614b1af9360a85a32fc53babbc57ecf5858fe71d334f96

    SHA512

    0e33b779aceb2a42f5c42e07bcd3ac70a3dbb1fd2bbd4ae154979735f58eeaab5abea05cea682f4b73f6b54174ace8ac3046c6e9a84c4a729a6ed2bffa1a9ec1

  • C:\Hypercommon\s6qV8wojz3Yx3vhyfOAzGuFvxlJ5l.vbe

    Filesize

    201B

    MD5

    0f314eb5d52ce9cd85095eadff4f908c

    SHA1

    272d25d43f789dd5fad479ab31e96214f82302b3

    SHA256

    f17ea2d9d889ef2012cb57191ad3a1d2d3351df8539b4029d6f7080d66217e89

    SHA512

    471b72558c045bc4acd276087d82e564aa7685373dea3ac3e90390df0f7f42ea06ae0254d3a4a9dc57312c7b1485916f4d470bd353b4b8c0b35d705573105f09

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

    Filesize

    1KB

    MD5

    baf55b95da4a601229647f25dad12878

    SHA1

    abc16954ebfd213733c4493fc1910164d825cac8

    SHA256

    ee954c5d8156fd8890e582c716e5758ed9b33721258f10e758bdc31ccbcb1924

    SHA512

    24f502fedb1a305d0d7b08857ffc1db9b2359ff34e06d5748ecc84e35c985f29a20d9f0a533bea32d234ab37097ec0481620c63b14ac89b280e75e14d19fd545

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

    Filesize

    422B

    MD5

    6b273e0cbcea417b261afe54d2c7a997

    SHA1

    caaae505b76884ba95b2465c95c1a47144ecaf8f

    SHA256

    5e96a6e6a2e5a7216941871f67b8e683b9eea2be80d66d7542b65a6491ba5480

    SHA512

    968d8a83c63c3029a122e9fc647663f5af261e12a7b23164ed514600174befad6ec3e3767de71607062c9dc37e2968a991b55fa76e35064c3819f960fb7ba196

  • C:\Users\Admin\AppData\Local\Temp\explorer.exe

    Filesize

    303KB

    MD5

    7d9282b8529bbb4ac06a3994fbcd0622

    SHA1

    d38d467c5e533f3bc247b6ed245fb08412a479d7

    SHA256

    ca5820bbbcbefd08f5ec820b833b23f7f97556a247da39510a70cbe7b809e3a9

    SHA512

    aec2d63548176dc1a8ad3d2dfce0bc41973230c6898c55171dec7fc2919b84a8061d4308449c9551cc40ac7c08ad773fd6a7818bbd748ede9be64acc11dcfca5

  • C:\Users\Admin\AppData\Local\Temp\svchost.exe

    Filesize

    1.1MB

    MD5

    3ee661f4a9794c72a91fa1f783f54969

    SHA1

    35780f52351da65b60cc63b302018950cbfe849f

    SHA256

    ebcaf07121ce2483989e7a71d00b83c54b942f71e51271d5b28886ef03e45b51

    SHA512

    0b53edac853f257b3c40b8b8014f0b0d53f546410d352965eace8eb251b2d75aa02e171586750a70dd97a4bc103b4b7707e90d5bd7a47c786858514f83281bde

  • memory/1872-0-0x00000000750EE000-0x00000000750EF000-memory.dmp

    Filesize

    4KB

  • memory/1872-2-0x0000000005150000-0x00000000051EC000-memory.dmp

    Filesize

    624KB

  • memory/1872-1-0x00000000005C0000-0x000000000072C000-memory.dmp

    Filesize

    1.4MB

  • memory/4508-39-0x0000000000C70000-0x0000000000D46000-memory.dmp

    Filesize

    856KB

  • memory/4984-26-0x00007FFE30510000-0x00007FFE30FD1000-memory.dmp

    Filesize

    10.8MB

  • memory/4984-24-0x00000187C1660000-0x00000187C16B2000-memory.dmp

    Filesize

    328KB

  • memory/4984-23-0x00007FFE30513000-0x00007FFE30515000-memory.dmp

    Filesize

    8KB

  • memory/4984-66-0x00007FFE30510000-0x00007FFE30FD1000-memory.dmp

    Filesize

    10.8MB