Analysis
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max time kernel
143s -
max time network
147s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system -
submitted
09-11-2024 14:39
Behavioral task
behavioral1
Sample
XClient.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
XClient.exe
Resource
win10v2004-20241007-en
General
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Target
XClient.exe
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Size
76KB
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MD5
8807fa0a397ac570dd8b1d6bed1aadc5
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SHA1
27531764eb5629d02ef10ad25a89328daa442f5a
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SHA256
3465eee847488e3fd2f70bc78642ce8f82cbef40b95b5ac448901d9e13c07dbb
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SHA512
ebedb1bd4ee83d2e1f97868c0cd5574e34deb2e61db2ec01e3ae32f11e979504a527391fdd3dcad02f785a4ea7d87084b23f396316a06fda3e01f8f1341f790b
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SSDEEP
1536:eX3pX/Z0rG675wHvayJbtE+bC5v5tUfJ3X1QkOyog9B3Kqb8:eX3R/KrN74ayJa+bCVQRekOG9Baqb8
Malware Config
Extracted
xworm
192.168.29.241:22119
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Install_directory
%ProgramData%
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install_file
USB.exe
Signatures
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Detect Xworm Payload 4 IoCs
resource yara_rule behavioral1/memory/1876-1-0x0000000001340000-0x0000000001358000-memory.dmp family_xworm behavioral1/files/0x0007000000012117-8.dat family_xworm behavioral1/memory/3016-10-0x0000000001390000-0x00000000013A8000-memory.dmp family_xworm behavioral1/memory/2204-15-0x0000000000300000-0x0000000000318000-memory.dmp family_xworm -
Xworm family
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Drops startup file 2 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Comet.lnk XClient.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Comet.lnk XClient.exe -
Executes dropped EXE 3 IoCs
pid Process 3016 Comet 2532 Comet 2204 Comet -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Windows\CurrentVersion\Run\Comet = "C:\\ProgramData\\Comet" XClient.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 2804 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 1 IoCs
pid Process 1876 XClient.exe -
Suspicious use of AdjustPrivilegeToken 5 IoCs
description pid Process Token: SeDebugPrivilege 1876 XClient.exe Token: SeDebugPrivilege 1876 XClient.exe Token: SeDebugPrivilege 3016 Comet Token: SeDebugPrivilege 2532 Comet Token: SeDebugPrivilege 2204 Comet -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 1876 XClient.exe -
Suspicious use of WriteProcessMemory 12 IoCs
description pid Process procid_target PID 1876 wrote to memory of 2804 1876 XClient.exe 30 PID 1876 wrote to memory of 2804 1876 XClient.exe 30 PID 1876 wrote to memory of 2804 1876 XClient.exe 30 PID 2580 wrote to memory of 3016 2580 taskeng.exe 33 PID 2580 wrote to memory of 3016 2580 taskeng.exe 33 PID 2580 wrote to memory of 3016 2580 taskeng.exe 33 PID 2580 wrote to memory of 2532 2580 taskeng.exe 34 PID 2580 wrote to memory of 2532 2580 taskeng.exe 34 PID 2580 wrote to memory of 2532 2580 taskeng.exe 34 PID 2580 wrote to memory of 2204 2580 taskeng.exe 36 PID 2580 wrote to memory of 2204 2580 taskeng.exe 36 PID 2580 wrote to memory of 2204 2580 taskeng.exe 36 -
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\XClient.exe"C:\Users\Admin\AppData\Local\Temp\XClient.exe"1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1876 -
C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Comet" /tr "C:\ProgramData\Comet"2⤵
- Scheduled Task/Job: Scheduled Task
PID:2804
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C:\Windows\system32\taskeng.exetaskeng.exe {1B6B1CB7-1DD8-455D-B39B-E499ECB7B60E} S-1-5-21-3290804112-2823094203-3137964600-1000:VORHPBAB\Admin:Interactive:[1]1⤵
- Suspicious use of WriteProcessMemory
PID:2580 -
C:\ProgramData\CometC:\ProgramData\Comet2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3016
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C:\ProgramData\CometC:\ProgramData\Comet2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2532
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C:\ProgramData\CometC:\ProgramData\Comet2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2204
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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
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
76KB
MD58807fa0a397ac570dd8b1d6bed1aadc5
SHA127531764eb5629d02ef10ad25a89328daa442f5a
SHA2563465eee847488e3fd2f70bc78642ce8f82cbef40b95b5ac448901d9e13c07dbb
SHA512ebedb1bd4ee83d2e1f97868c0cd5574e34deb2e61db2ec01e3ae32f11e979504a527391fdd3dcad02f785a4ea7d87084b23f396316a06fda3e01f8f1341f790b