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Analysis
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max time kernel
143s -
max time network
148s -
platform
windows10-2004_x64 -
resource
win10v2004-20230703-en -
resource tags
arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system -
submitted
17/07/2023, 12:49
Static task
static1
Behavioral task
behavioral1
Sample
8421b07fef4b5f_JC.exe
Resource
win7-20230712-en
Behavioral task
behavioral2
Sample
8421b07fef4b5f_JC.exe
Resource
win10v2004-20230703-en
General
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Target
8421b07fef4b5f_JC.exe
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Size
467KB
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MD5
8421b07fef4b5fd01ee94ab88da0066b
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SHA1
5de92151ebec2e0608e9e5d022f5da7c38e34b53
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SHA256
20402a7587544d4b4d76afbe3fecf82239eed5b9b3dc69885c748f785ba55708
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SHA512
385073a21b5d66fc1c0d8df0e1c8d35248e3d32d0c1ab659a46a861caf39eb0ad232f5f74c896229754178ac4a271773bb80f4bf01bf401ce2677584d8161fa9
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SSDEEP
6144:jFrJxvldL4c5ONK1xgWbd1s79+iStwTgUq+uUCN5Tb/lEh7cJJqBhGrirbO4Dyb9:Bb4bZudi79Lf/65Tb/QLGrObb/zsn1Ak
Malware Config
Signatures
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-1420546310-613437930-2990200354-1000\Control Panel\International\Geo\Nation 67A3.tmp -
Executes dropped EXE 1 IoCs
pid Process 4056 67A3.tmp -
Drops file in System32 directory 1 IoCs
description ioc Process File created C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{5280EF14-F33D-4E7F-AB6A-49A7AD2C7FCA}.catalogItem svchost.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Checks processor information in registry 2 TTPs 6 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 WINWORD.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz WINWORD.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString WINWORD.EXE Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 svchost.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz svchost.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString svchost.exe -
Enumerates system info in registry 2 TTPs 5 IoCs
description ioc Process Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS svchost.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU svchost.exe Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS WINWORD.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily WINWORD.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU WINWORD.EXE -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-1420546310-613437930-2990200354-1000_Classes\Local Settings 67A3.tmp -
Suspicious behavior: AddClipboardFormatListener 2 IoCs
pid Process 3936 WINWORD.EXE 3936 WINWORD.EXE -
Suspicious behavior: RenamesItself 1 IoCs
pid Process 4056 67A3.tmp -
Suspicious use of SetWindowsHookEx 8 IoCs
pid Process 3936 WINWORD.EXE 3936 WINWORD.EXE 3936 WINWORD.EXE 3936 WINWORD.EXE 3936 WINWORD.EXE 3936 WINWORD.EXE 3936 WINWORD.EXE 3936 WINWORD.EXE -
Suspicious use of WriteProcessMemory 5 IoCs
description pid Process procid_target PID 4840 wrote to memory of 4056 4840 8421b07fef4b5f_JC.exe 86 PID 4840 wrote to memory of 4056 4840 8421b07fef4b5f_JC.exe 86 PID 4840 wrote to memory of 4056 4840 8421b07fef4b5f_JC.exe 86 PID 4056 wrote to memory of 3936 4056 67A3.tmp 90 PID 4056 wrote to memory of 3936 4056 67A3.tmp 90 -
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
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C:\Users\Admin\AppData\Local\Temp\8421b07fef4b5f_JC.exe"C:\Users\Admin\AppData\Local\Temp\8421b07fef4b5f_JC.exe"1⤵
- Suspicious use of WriteProcessMemory
PID:4840 -
C:\Users\Admin\AppData\Local\Temp\67A3.tmp"C:\Users\Admin\AppData\Local\Temp\67A3.tmp" --helpC:\Users\Admin\AppData\Local\Temp\8421b07fef4b5f_JC.exe CEC31A260443769E9E00B2FA5409E2BA673C95D9FBE7736FCDDE2C556345176099BA8D5A2746C8E98FE2ACC3A5BC07F00F87977056B075EB71B3EF1DCA6B2A662⤵
- Checks computer location settings
- Executes dropped EXE
- Modifies registry class
- Suspicious behavior: RenamesItself
- Suspicious use of WriteProcessMemory
PID:4056 -
C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE"C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\8421b07fef4b5f_JC.doc" /o ""3⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:3936
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k netsvcs -p1⤵
- Drops file in System32 directory
- Checks processor information in registry
- Enumerates system info in registry
PID:2684
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
467KB
MD5208687152a630b8713f7c2907531df23
SHA1989ed4c652bfbc66e08506eb4c133233a3361fa9
SHA256189660852e40374627f5d256f14c95f9c6fe33588f35ba99ae6748cb1607045e
SHA5123b6cc342c3a72951cf9771e4c0d229c05b8ec447c3a59755b2f115c17acdaff97e1b454c1e7b3b0ceb75f2d67e875f9bfa5f5b43b4fe16e60bb234153955907b
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Filesize
467KB
MD5208687152a630b8713f7c2907531df23
SHA1989ed4c652bfbc66e08506eb4c133233a3361fa9
SHA256189660852e40374627f5d256f14c95f9c6fe33588f35ba99ae6748cb1607045e
SHA5123b6cc342c3a72951cf9771e4c0d229c05b8ec447c3a59755b2f115c17acdaff97e1b454c1e7b3b0ceb75f2d67e875f9bfa5f5b43b4fe16e60bb234153955907b
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Filesize
35KB
MD5a6b03fc9e5439b7504ba08010a960962
SHA1e93a74f35ac1ed020158642eb1f2087fd31fc7c6
SHA256b3b306a9618a08a003443e00e8ce2fcb14040775c3aeadc11cf120668e98dff1
SHA512decbe4fa7eec0833a27acbde8b4de099124aa42e551f710fb615e6fc5aa0056ce9e44fc282e4930b1a669a1e012700b2c79cebc8a7b8ee4c66cfc29c800cddd0
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Filesize
35KB
MD5a6b03fc9e5439b7504ba08010a960962
SHA1e93a74f35ac1ed020158642eb1f2087fd31fc7c6
SHA256b3b306a9618a08a003443e00e8ce2fcb14040775c3aeadc11cf120668e98dff1
SHA512decbe4fa7eec0833a27acbde8b4de099124aa42e551f710fb615e6fc5aa0056ce9e44fc282e4930b1a669a1e012700b2c79cebc8a7b8ee4c66cfc29c800cddd0
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Filesize
2B
MD5f3b25701fe362ec84616a93a45ce9998
SHA1d62636d8caec13f04e28442a0a6fa1afeb024bbb
SHA256b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209
SHA51298c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84