Analysis
- max time kernel
299s - max time network
292s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows - submitted
25/09/2026, 18:47
Static task
static1
1 signatures
Behavioral task
behavioral1
Sample
agent-4312.exe
Resource
win10v2004-20260911-en
24 signatures
300 seconds
Behavioral task
behavioral2
Sample
agent-4312.exe
Resource
win11ltsc2024-20260911-en
4 signatures
300 seconds
General
- Target agent-4312.exe
- Size 14.0MB
- Sample260925-xfg9eaha25
- SHA256 77c4ca5ea6481637c7c9799eb3b1a57432754b6d8113e92a45af47df218a8012
- MD5 68264fc76b37520327736001a43c6bec
- SHA1 abd62bf10fd81f38d09afd758a05cf3cf075b7f9
- SHA512 6ada13f87ae673609fbe260e65a16bde40f4631543406fc6270bb14f3e444a6bdfd7aa508c32dd688311fb146ec25242399cb8bf2a6c85078296ced2fa0d047a
- SSDEEP 49152:xJBk3VLrckoqXY+YLqFEhfBtkQCnLob5BjvsJYHvAGdDpYffaTe25nQhfBZowygV:xJalHQP
- TLSH T1EFE61213FCA528F6C1AD9231897755527BB1BC881F2263D75E90B6782F72BC09C7AB04
- MD5 SHA1 SHA512 SSDEEP TLSH
Score
7/10
Malware Config
Signatures
- Executes dropped EXE 3 IoCs
pid Process 4228 mrhg26jt64.exe 4880 JesterWare.exe 2492 JesterWare.exe - Adds Run key to start application 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-4154726816-2055034831-2297277433-1000\Software\Microsoft\Windows\CurrentVersion\Run\JesterWare.exe = "C:\\Users\\Admin\\AppData\\Roaming\\WindowsUpdate\\agent\\JesterWare.exe" JesterWare.exe Set value (str) \REGISTRY\USER\S-1-5-21-4154726816-2055034831-2297277433-1000\Software\Microsoft\Windows\CurrentVersion\Run\JesterWare.exe = "C:\\Users\\Admin\\AppData\\Roaming\\WindowsUpdate\\agent\\JesterWare.exe" JesterWare.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 JesterWare.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname JesterWare.exe - Suspicious use of WriteProcessMemory 2 IoCs
description pid Process procid_target PID 3292 wrote to memory of 4228 3292 agent-4312.exe 89 PID 4228 wrote to memory of 4880 4228 mrhg26jt64.exe 90
Processes
-
C:\Users\Admin\AppData\Local\Temp\agent-4312.exe"C:\Users\Admin\AppData\Local\Temp\agent-4312.exe"1⤵
- Suspicious use of WriteProcessMemory
PID:3292 -
C:\Users\Admin\AppData\Local\Temp\uosa98ty0xh07k\mrhg26jt64.exeC:\Users\Admin\AppData\Local\Temp\uosa98ty0xh07k\mrhg26jt64.exe2⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:4228 -
C:\Users\Admin\AppData\Roaming\WindowsUpdate\agent\JesterWare.exe"C:\Users\Admin\AppData\Roaming\WindowsUpdate\agent\JesterWare.exe"3⤵
- Executes dropped EXE
- Adds Run key to start application
- Reads the TCP/IP host and domain name from the registry
PID:4880
-
-
-
C:\Users\Admin\AppData\Roaming\WindowsUpdate\agent\JesterWare.exeC:\Users\Admin\AppData\Roaming\WindowsUpdate\agent\JesterWare.exe1⤵
- Executes dropped EXE
- Adds Run key to start application
- Reads the TCP/IP host and domain name from the registry
PID:2492
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Temp\uosa98ty0xh07k\mrhg26jt64.exe
- Size 9.0MB
- SHA256 ee2207dbc87b7b56c6e373651ea30b26f2ebb278c3329ea1ad7be1f819eeeddc
- MD5 f277bc383de09b8faf5dd17f26b8e878
- SHA1 0c8b4356478642cf686fe54cde01bb5820df4acb
- SHA512 5ec2d896c6c1846406bbc00fdf24c3906c0a2a9fe973f4e2e54e0d380b72baf778f1e408a73c861badf49f0e6ec1c2df0fb825c903f67d77bc97f0574b570c0c
- SSDEEP 98304:HhCN93pnKGW0C9E1fJjJ24POa0EYjd/ubA:HYFppCu1Rk4PAEOd/D
- TLSH T1C4968B03EC9558E9C4AED27086729562BB71BC480B3123D71FA0FA293F76BD06DB9354
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path C:\Users\Admin\AppData\Roaming\WindowsUpdate\agent\id
- Size 32B
- SHA256 bb1dae1af8c6a705f80a17266f24658e47308b2b90df557b734a191846fbca53
- MD5 f42ed5667f45d19d978fa5fd21ec5e50
- SHA1 350249654e6b9f67d96585a640f70e7c0bb5bb7a
- SHA512 afafc11cbc03d177984980916942b86a0484cb2f2ff2b5b9599fdf0259f4391de1fb6cd1277d5d5dc51addd4e2e58bae3606a07e782275839dd9f2d59f456430
- MD5 SHA1 SHA512