Analysis
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max time kernel
150s -
max time network
124s -
platform
windows7_x64 -
resource
win7-20241010-en -
resource tags
arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system -
submitted
24-12-2024 02:31
Behavioral task
behavioral1
Sample
Built.exe
Resource
win7-20241010-en
Behavioral task
behavioral2
Sample
Built.exe
Resource
win10v2004-20241007-en
General
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Target
Built.exe
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Size
8.4MB
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MD5
0c86d73d42f5caf623b9f4d7afb660cf
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SHA1
8dcb47b711f5f95d1b0d65fb5af14fcefdb9b402
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SHA256
9d0dcb19f263573b2c7fd3e6fa6d5e06464bc10b371b6bde6e381a309022f551
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SHA512
812c200512b4e2b5ffce4f13525b2b7e4f2fd3ebc8dd6eb8a959c08b20afa0dfd4281f2112b786165dfeb04940adfe86eb019fd48b7f5f8dbe4c03aa57bb4a9f
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SSDEEP
196608:501dIwfI9jUCnORird1Kp0RLOYFSEcN2oc+nBIdAx2:6zIHOQ7nE1nnBIl
Malware Config
Signatures
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Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs
description ioc Process Set value (int) \REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" explorer.exe -
Executes dropped EXE 8 IoCs
pid Process 2944 built.exe 2648 built.exe 1240 Process not Found 1848 icsys.icn.exe 1780 explorer.exe 392 spoolsv.exe 552 svchost.exe 2908 spoolsv.exe -
Loads dropped DLL 15 IoCs
pid Process 1852 Built.exe 2944 built.exe 2648 built.exe 2648 built.exe 2648 built.exe 2648 built.exe 2648 built.exe 2648 built.exe 2648 built.exe 1852 Built.exe 1240 Process not Found 1848 icsys.icn.exe 1780 explorer.exe 392 spoolsv.exe 552 svchost.exe -
Adds Run key to start application 2 TTPs 4 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Explorer = "c:\\windows\\resources\\themes\\explorer.exe RO" svchost.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\resources\\svchost.exe RO" svchost.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Explorer = "c:\\windows\\resources\\themes\\explorer.exe RO" explorer.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\resources\\svchost.exe RO" explorer.exe -
Drops file in System32 directory 2 IoCs
description ioc Process File opened for modification C:\Windows\SysWOW64\explorer.exe explorer.exe File opened for modification C:\Windows\SysWOW64\explorer.exe svchost.exe -
resource yara_rule behavioral1/files/0x000500000001a3f6-84.dat upx -
Drops file in Windows directory 5 IoCs
description ioc Process File opened for modification C:\Windows\Resources\Themes\icsys.icn.exe Built.exe File opened for modification \??\c:\windows\resources\themes\explorer.exe icsys.icn.exe File opened for modification \??\c:\windows\resources\spoolsv.exe explorer.exe File opened for modification \??\c:\windows\resources\svchost.exe spoolsv.exe File opened for modification C:\Windows\Resources\tjud.exe explorer.exe -
System Location Discovery: System Language Discovery 1 TTPs 9 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language svchost.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language spoolsv.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language schtasks.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language icsys.icn.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language explorer.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language spoolsv.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language Built.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language schtasks.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language schtasks.exe -
Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 2472 schtasks.exe 1688 schtasks.exe 2924 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 1852 Built.exe 1852 Built.exe 1852 Built.exe 1852 Built.exe 1852 Built.exe 1852 Built.exe 1852 Built.exe 1852 Built.exe 1852 Built.exe 1852 Built.exe 1852 Built.exe 1852 Built.exe 1852 Built.exe 1852 Built.exe 1852 Built.exe 1852 Built.exe 1848 icsys.icn.exe 1848 icsys.icn.exe 1848 icsys.icn.exe 1848 icsys.icn.exe 1848 icsys.icn.exe 1848 icsys.icn.exe 1848 icsys.icn.exe 1848 icsys.icn.exe 1848 icsys.icn.exe 1848 icsys.icn.exe 1848 icsys.icn.exe 1848 icsys.icn.exe 1848 icsys.icn.exe 1848 icsys.icn.exe 1848 icsys.icn.exe 1848 icsys.icn.exe 1848 icsys.icn.exe 1780 explorer.exe 1780 explorer.exe 1780 explorer.exe 1780 explorer.exe 1780 explorer.exe 1780 explorer.exe 1780 explorer.exe 1780 explorer.exe 1780 explorer.exe 1780 explorer.exe 1780 explorer.exe 1780 explorer.exe 1780 explorer.exe 1780 explorer.exe 1780 explorer.exe 1780 explorer.exe 552 svchost.exe 552 svchost.exe 552 svchost.exe 552 svchost.exe 552 svchost.exe 552 svchost.exe 552 svchost.exe 552 svchost.exe 552 svchost.exe 552 svchost.exe 552 svchost.exe 552 svchost.exe 552 svchost.exe 552 svchost.exe 552 svchost.exe -
Suspicious behavior: GetForegroundWindowSpam 3 IoCs
pid Process 1780 explorer.exe 552 svchost.exe 2648 built.exe -
Suspicious use of SetWindowsHookEx 12 IoCs
pid Process 1852 Built.exe 1852 Built.exe 1848 icsys.icn.exe 1848 icsys.icn.exe 1780 explorer.exe 1780 explorer.exe 392 spoolsv.exe 392 spoolsv.exe 552 svchost.exe 552 svchost.exe 2908 spoolsv.exe 2908 spoolsv.exe -
Suspicious use of WriteProcessMemory 43 IoCs
description pid Process procid_target PID 1852 wrote to memory of 2944 1852 Built.exe 30 PID 1852 wrote to memory of 2944 1852 Built.exe 30 PID 1852 wrote to memory of 2944 1852 Built.exe 30 PID 1852 wrote to memory of 2944 1852 Built.exe 30 PID 2944 wrote to memory of 2648 2944 built.exe 31 PID 2944 wrote to memory of 2648 2944 built.exe 31 PID 2944 wrote to memory of 2648 2944 built.exe 31 PID 1852 wrote to memory of 1848 1852 Built.exe 32 PID 1852 wrote to memory of 1848 1852 Built.exe 32 PID 1852 wrote to memory of 1848 1852 Built.exe 32 PID 1852 wrote to memory of 1848 1852 Built.exe 32 PID 1848 wrote to memory of 1780 1848 icsys.icn.exe 33 PID 1848 wrote to memory of 1780 1848 icsys.icn.exe 33 PID 1848 wrote to memory of 1780 1848 icsys.icn.exe 33 PID 1848 wrote to memory of 1780 1848 icsys.icn.exe 33 PID 1780 wrote to memory of 392 1780 explorer.exe 34 PID 1780 wrote to memory of 392 1780 explorer.exe 34 PID 1780 wrote to memory of 392 1780 explorer.exe 34 PID 1780 wrote to memory of 392 1780 explorer.exe 34 PID 392 wrote to memory of 552 392 spoolsv.exe 35 PID 392 wrote to memory of 552 392 spoolsv.exe 35 PID 392 wrote to memory of 552 392 spoolsv.exe 35 PID 392 wrote to memory of 552 392 spoolsv.exe 35 PID 552 wrote to memory of 2908 552 svchost.exe 36 PID 552 wrote to memory of 2908 552 svchost.exe 36 PID 552 wrote to memory of 2908 552 svchost.exe 36 PID 552 wrote to memory of 2908 552 svchost.exe 36 PID 1780 wrote to memory of 2164 1780 explorer.exe 37 PID 1780 wrote to memory of 2164 1780 explorer.exe 37 PID 1780 wrote to memory of 2164 1780 explorer.exe 37 PID 1780 wrote to memory of 2164 1780 explorer.exe 37 PID 552 wrote to memory of 2924 552 svchost.exe 38 PID 552 wrote to memory of 2924 552 svchost.exe 38 PID 552 wrote to memory of 2924 552 svchost.exe 38 PID 552 wrote to memory of 2924 552 svchost.exe 38 PID 552 wrote to memory of 2472 552 svchost.exe 41 PID 552 wrote to memory of 2472 552 svchost.exe 41 PID 552 wrote to memory of 2472 552 svchost.exe 41 PID 552 wrote to memory of 2472 552 svchost.exe 41 PID 552 wrote to memory of 1688 552 svchost.exe 43 PID 552 wrote to memory of 1688 552 svchost.exe 43 PID 552 wrote to memory of 1688 552 svchost.exe 43 PID 552 wrote to memory of 1688 552 svchost.exe 43
Processes
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C:\Users\Admin\AppData\Local\Temp\Built.exe"C:\Users\Admin\AppData\Local\Temp\Built.exe"1⤵
- Loads dropped DLL
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1852 -
\??\c:\users\admin\appdata\local\temp\built.exec:\users\admin\appdata\local\temp\built.exe2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2944 -
\??\c:\users\admin\appdata\local\temp\built.exec:\users\admin\appdata\local\temp\built.exe3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious behavior: GetForegroundWindowSpam
PID:2648
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C:\Windows\Resources\Themes\icsys.icn.exeC:\Windows\Resources\Themes\icsys.icn.exe2⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1848 -
\??\c:\windows\resources\themes\explorer.exec:\windows\resources\themes\explorer.exe3⤵
- Modifies visiblity of hidden/system files in Explorer
- Executes dropped EXE
- Loads dropped DLL
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1780 -
\??\c:\windows\resources\spoolsv.exec:\windows\resources\spoolsv.exe SE4⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:392 -
\??\c:\windows\resources\svchost.exec:\windows\resources\svchost.exe5⤵
- Modifies visiblity of hidden/system files in Explorer
- Executes dropped EXE
- Loads dropped DLL
- Adds Run key to start application
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:552 -
\??\c:\windows\resources\spoolsv.exec:\windows\resources\spoolsv.exe PR6⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
PID:2908
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C:\Windows\SysWOW64\schtasks.exeschtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 02:33 /f6⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:2924
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C:\Windows\SysWOW64\schtasks.exeschtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 02:34 /f6⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:2472
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C:\Windows\SysWOW64\schtasks.exeschtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 02:35 /f6⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:1688
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C:\Windows\Explorer.exeC:\Windows\Explorer.exe4⤵PID:2164
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Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
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Downloads
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Filesize
21KB
MD51c58526d681efe507deb8f1935c75487
SHA10e6d328faf3563f2aae029bc5f2272fb7a742672
SHA256ef13dce8f71173315dfc64ab839b033ab19a968ee15230e9d4d2c9d558efeee2
SHA5128edb9a0022f417648e2ece9e22c96e2727976332025c3e7d8f15bcf6d7d97e680d1bf008eb28e2e0bd57787dcbb71d38b2deb995b8edc35fa6852ab1d593f3d1
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Filesize
18KB
MD5bfffa7117fd9b1622c66d949bac3f1d7
SHA1402b7b8f8dcfd321b1d12fc85a1ee5137a5569b2
SHA2561ea267a2e6284f17dd548c6f2285e19f7edb15d6e737a55391140ce5cb95225e
SHA512b319cc7b436b1be165cdf6ffcab8a87fe29de78f7e0b14c8f562be160481fb5483289bd5956fdc1d8660da7a3f86d8eede35c6cc2b7c3d4c852decf4b2dcdb7f
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Filesize
21KB
MD5724223109e49cb01d61d63a8be926b8f
SHA1072a4d01e01dbbab7281d9bd3add76f9a3c8b23b
SHA2564e975f618df01a492ae433dff0dd713774d47568e44c377ceef9e5b34aad1210
SHA51219b0065b894dc66c30a602c9464f118e7f84d83010e74457d48e93aaca4422812b093b15247b24d5c398b42ef0319108700543d13f156067b169ccfb4d7b6b7c
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Filesize
21KB
MD5517eb9e2cb671ae49f99173d7f7ce43f
SHA14ccf38fed56166ddbf0b7efb4f5314c1f7d3b7ab
SHA25657cc66bf0909c430364d35d92b64eb8b6a15dc201765403725fe323f39e8ac54
SHA512492be2445b10f6bfe6c561c1fc6f5d1af6d1365b7449bc57a8f073b44ae49c88e66841f5c258b041547fcd33cbdcb4eb9dd3e24f0924db32720e51651e9286be
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Filesize
21KB
MD5d12403ee11359259ba2b0706e5e5111c
SHA103cc7827a30fd1dee38665c0cc993b4b533ac138
SHA256f60e1751a6ac41f08e46480bf8e6521b41e2e427803996b32bdc5e78e9560781
SHA5129004f4e59835af57f02e8d9625814db56f0e4a98467041da6f1367ef32366ad96e0338d48fff7cc65839a24148e2d9989883bcddc329d9f4d27cae3f843117d0
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Filesize
1.7MB
MD53c5c6c489c358149c970b3b2e562be5f
SHA12f1077db20405b0a176597ed34a10b4730af3ca9
SHA25673a22a12ea3d7f763ed2cea94bb877441f4134b40f043c400648d85565757741
SHA512d3fb4e5df409bf2de4f5dc5d02d806aee649a21c339c648248b835c3d5d66ab88312c076c149eaadaa3ce0fb43e6fa293bfa369d8876d6eb18742bd9d12448e3
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Filesize
992KB
MD50e0bac3d1dcc1833eae4e3e4cf83c4ef
SHA14189f4459c54e69c6d3155a82524bda7549a75a6
SHA2568a91052ef261b5fbf3223ae9ce789af73dfe1e9b0ba5bdbc4d564870a24f2bae
SHA512a45946e3971816f66dd7ea3788aacc384a9e95011500b458212dc104741315b85659e0d56a41570731d338bdf182141c093d3ced222c007038583ceb808e26fd
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Filesize
135KB
MD5fa999b354244c8c27ee80ab9e9473b4d
SHA14cd6b613c6e153bcaf8e81f384ba2c11347516bc
SHA25619404d9d3e44603e668929810983449d9ddf4d708edcf7a6254ec496f47dde30
SHA5123d0819784eb3c060c650e230922ec71b18b5b0f81f674bbc80d03cac7f29211687b4017d2a263a56a87460b9492123bf975b390e5856a83f2f8bb3752b5ae49b
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Filesize
135KB
MD5297929d04018c5524cd9aabfaaa7198a
SHA195f06d03e9ede826bfe482eaa09e9ab66eb1c585
SHA256490c61b0f669580231766a19db0520ef865c322810d7ed48852da88b39ad8aea
SHA5120227c1bab1e81b69a20f1ad9d177a5d428e74a5592438076bdf2b0bf1f51ba8f3e8cbf5e9d0a047db7201d9dad4f32d8d111f2ef06c6af8650b3de2855eb5f8d
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Filesize
135KB
MD58e5c45350aef3bcce5348109ac5a3542
SHA137888b55d7902b79ae2b8a965d43aeb7f04673d1
SHA256fcefce90500779d52e9396861fa2d156038085370dc273ba83538d627d2d007e
SHA51275e3c1bfef4d7d342a26909f66ddcd01915dd6c7e318abe2b1a0fa93caa677c82cf8e687c1c303a24534ef0f67a42f9283ac941e83e831ebd17bf1af80dd74c6
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Filesize
8.3MB
MD5ab092955e039b2d8498904e6e382abd4
SHA119bb52f1bd637ad0a38123a054ade4f41dfafe3a
SHA25616534683d0ae64e39fa5b59dd5d82089f8f77debc61c17dc2c2b42bc2596fe27
SHA5128baa620582ac0c9eb4ee61de978e764a5cb82d351a5125bf947bdb8faf7a8f313f10a21ca4ee6bb08674e8e821fb34576ce5164b1b29072d80cb160f24215c0f
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Filesize
135KB
MD5a83a1f0a07281048d38b4c96f1160a3a
SHA132f6846fac3537f51835fa6ed5989ffa125c2050
SHA25699f990f4bb333da095d7dd4fff41f0578fbb73e7518e0bd4542f071c6377b8f6
SHA512404d82dab80e69f4a15a6c053a96eb1bf21687edd72d30a980258f4806d06cd59c28b54eed8283a289d218a52772b28dc410b6ed940e3eb1f2d4e60c17fef538