Analysis
- max time kernel
149s - max time network
149s - platform
windows10-2004_x64 - resource
win10v2004-20260911-en - resource tags
arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows - submitted
12/10/2026, 10:09
Behavioral task
behavioral1
Sample
fengyunjishaungui.exe
Resource
win10v2004-20260911-en
13 signatures
150 seconds
General
- Target fengyunjishaungui.exe
- Size 4.0MB
- Sample261012-l6892abe75
- SHA256 77c180b1536958213383d746c88348dcffb363e92f381b6ed452255c0189d57a
- MD5 53fffaf06c513ae000ebf2446c0002ca
- SHA1 a1b2f6b30a71d63e563f074e7b0ecbfaeafe458c
- SHA512 45b42c6cfb26028fc2da2fcf569cdb0d7823bfe777910b2f44ff59674d300123b02c4eff7eff6f433355b78a6bd39cad1ac81c2f17d79447e2bf55f7e470ad6e
- SSDEEP 49152:puI2hLXQ952xqiOC2JJHtitMigSiEJewr89qA/Fo+CYQfoSL3rdf/rVltjk4:p5OLmuMUkFoXs2rJztH
- TLSH T18C16BE2F63ED4069D07E923A9577811AE673741127318ACB42E4856C9F3BBF01D3EB62
- MD5 SHA1 SHA512 SSDEEP TLSH
Malware Config
Signatures
- Downloads MZ/PE file 1 IoCs
flow pid Process 28 1540 helper.exe - Executes dropped EXE 2 IoCs
pid Process 5088 fengyunjishaungui.tmp 1540 helper.exe - Loads dropped DLL 1 IoCs
pid Process 1540 helper.exe - Executes a VBScript file via the Windows Script Host. 1 TTPs 1 IoCs
pid Process 2900 wscript.exe - Enumerates video capture drivers 2 TTPs 1 IoCs
Queries the legacy Video for Windows capture drivers. This is commonly abused by RATs to check for available webcams on the system before reporting to their C2.
description ioc Process Key value queried \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Drivers32\msvideo9 helper.exe - Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs
The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.
description ioc Process Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname helper.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain helper.exe - System Location Discovery: System Language Discovery 1 TTPs 3 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 fengyunjishaungui.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language fengyunjishaungui.tmp Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language helper.exe - Inno Setup is an open-source installation builder for Windows applications. 2 IoCs
Inno Setup installer
resource yara_rule behavioral1/memory/2800-0-0x0000000000550000-0x000000000062C000-memory.dmp innosetup behavioral1/memory/2800-25-0x0000000000550000-0x000000000062C000-memory.dmp innosetup - Suspicious behavior: EnumeratesProcesses 42 IoCs
pid Process 5088 fengyunjishaungui.tmp 5088 fengyunjishaungui.tmp 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe 1540 helper.exe - Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 5088 fengyunjishaungui.tmp - Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 1540 helper.exe - Suspicious use of WriteProcessMemory 2 IoCs
description pid Process procid_target PID 2800 wrote to memory of 5088 2800 fengyunjishaungui.exe 84 PID 5088 wrote to memory of 1540 5088 fengyunjishaungui.tmp 88
Processes
-
C:\Users\Admin\AppData\Local\Temp\fengyunjishaungui.exe"C:\Users\Admin\AppData\Local\Temp\fengyunjishaungui.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2800 -
C:\Users\Admin\AppData\Local\Temp\is-ZVRQIWYFWH.tmp\fengyunjishaungui.tmp"C:\Users\Admin\AppData\Local\Temp\is-ZVRQIWYFWH.tmp\fengyunjishaungui.tmp" /SL5="$502F6,3032297,842240,C:\Users\Admin\AppData\Local\Temp\fengyunjishaungui.exe"2⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:5088 -
C:\Users\Admin\AppData\Local\BravemontToolsLtd\FileSortUtility\4.80.6725.2026101211111683\helper.exe"C:\Users\Admin\AppData\Local\BravemontToolsLtd\FileSortUtility\4.80.6725.2026101211111683\helper.exe" -Embedding3⤵
- Downloads MZ/PE file
- Executes dropped EXE
- Loads dropped DLL
- Enumerates video capture drivers
- Reads the TCP/IP host and domain name from the registry
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
PID:1540
-
-
-
C:\Windows\system32\wscript.exeC:\Windows\system32\wscript.exe C:\ProgramData\EAC28CDE\58111BD0.vbs1⤵
- Executes a VBScript file via the Windows Script Host.
PID:2900
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
Loading Replay Monitor...
Downloads
- Path C:\Users\Admin\AppData\Local\BravemontToolsLtd\FileSortUtility\4.80.6725.2026101211111683\GameuxInstallHelper.dll
- Size 103KB
- SHA256 81885c18d662dd63a4e58281d7a6673f285ccdfb804eb9dcad3c1bc8f50c8c06
- MD5 b582766c8c82262f2358f738410d6946
- SHA1 e2c99131a335b090acca9b020957da9d7d86c12d
- SHA512 fcc445a7c541efffeb5b584dda3759507c20a2d4f2a942be1521dada1d43784a7b4e2dc9752305dc6def09fe27f5ab0d16d666f08dcd643f9ca1bc4af495bded
- SSDEEP 1536:Clk6hp7X/KNIny2Ne6z9K0dnquPdM4ufU+6SHXm9AIOWhvI0eOs:Clku2X6zUaZkfU+6AXw2WhvI0eOs
- TLSH T1ABA36C44FA8225B3F073A5B059D7A3FB433176228978CEEFEACC5B44BA2770059581D9
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path C:\Users\Admin\AppData\Local\BravemontToolsLtd\FileSortUtility\4.80.6725.2026101211111683\helper.exe
- Size 111KB
- SHA256 8ab6634d56788a3b5648262d678ee9ba0ba797e10a864f649050aa0e193e22cc
- MD5 b9a260f7f9b98caa279db557922ccbe3
- SHA1 9b8ce344febc4a7c25b610b7236a62c2aa9b4598
- SHA512 ab354e3af4ac4f669dc980ef0984170a728c34a3b16d7c1c969c36c7af641e86348e61037bf17dcca3116dcecae9bfe08cc861c7e91506ce70fa2634e5ece97f
- SSDEEP 1536:YhSUvJEGEfSySB59j+I3eTw/b7jZFVc5D4BtTGYywBu3PmJ+6SHXm9u:aT+fSrbInY3eD4Btn2Pg+6AXwu
- TLSH T172B35A527780E432E0926A705966C2B24B373C325FB986CB27D47E6E7E713C1AD34369
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path C:\Users\Admin\AppData\Local\Temp\is-ZVRQIWYFWH.tmp\fengyunjishaungui.tmp
- Size 4.1MB
- SHA256 01e2015b83878e08c670c65fcfa04d209a17c6b7a83de66993841f20e0be6147
- MD5 5b6cf65d96fa6a05e6adcc21992e1fc8
- SHA1 425f1fc71d2bb7fec08a07db2a089b0e2b7ecfa7
- SHA512 72f473a061b08e8c4fd10aaace29d0ab964f6ad74e8db79b0279d7add2d888f583bf840626f94abc21591d0defb23c1bc7a28376af7a2c9ae9f68257848172c8
- SSDEEP 98304:t9SZUvl30aj90ZFcvdQ0hdgvminQLMj+Jv3336:CItJj90Z6RgKwt
- TLSH T121168E03B388753EE4B71A3A883FA654583F7A213A26CD4B6BF40D5C4F396416D2A747
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path C:\Users\Admin\AppData\Roaming\cmake\5dc6459541bea5fdfb0bce4da4f6d1a4
- Size 442B
- SHA256 2a5d6bb193158c5b447bee9dd8c21fed608a21d53db6aeabefa41b71ac992d78
- MD5 052eaf5298af0dbfe0b3ba3b4d0877f6
- SHA1 2105e8ee29c0827fb631f040f52bc6d81d3e17db
- SHA512 6c23221de33432c96c75dd6fd95ae6f6f1584a1a14d3aa32ac06b1ab40a843cd5313ae35066a0a19421057ad49fe6021871b5033903f70794d31ec39a0b6f6a7
- TLSH T145F012851AFCA123E7BB9A71C3F508E2FF20A8607A07680D0003C2080C23E864E5FF2D
- MD5 SHA1 SHA512 TLSH