Analysis
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max time kernel
20s -
max time network
25s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
02-03-2024 01:43
Behavioral task
behavioral1
Sample
a.exe
Resource
win7-20240221-en
General
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Target
a.exe
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Size
143KB
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MD5
74f22ec8451a5d788ee312e2b637519c
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SHA1
a7bd09f6f3d7f9b3ec33b5d4c2787223459d1fc0
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SHA256
48614dc3fd49968db9c35b840a6609f397f2f1813daa7c56b659036edf82f2e2
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SHA512
5b356e4811c58bcede2c3a5a0614e40049ef2a68c63c76fa78f612441d1ca9e1200f7a0544ffbca66ab4e0668fd0ec196bf0cdbff60ff7097c5f476b1675492b
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SSDEEP
3072:e0cwsSCbN9bHfhFuZHvE2Rf2p65ddPPHziJsEabvx0hQWf5CrAZuCHd:eEs9Crziy7bpq
Malware Config
Extracted
toxiceye
https://api.telegram.org/bot7040511851:AAEjBKSxADGWlNtLxaKpotGtf53NUQ1UgAo/sendMessage?chat_id=6226815698
Signatures
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Contains code to disable Windows Defender 3 IoCs
A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.
Processes:
resource yara_rule behavioral2/memory/4856-0-0x0000020972800000-0x000002097282A000-memory.dmp disable_win_def C:\Users\CyberEye\rat.exe disable_win_def behavioral2/memory/3888-12-0x00000267F4CF0000-0x00000267F4D00000-memory.dmp disable_win_def -
Downloads MZ/PE file
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Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
a.exerat.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-2727153400-192325109-1870347593-1000\Control Panel\International\Geo\Nation a.exe Key value queried \REGISTRY\USER\S-1-5-21-2727153400-192325109-1870347593-1000\Control Panel\International\Geo\Nation rat.exe -
Executes dropped EXE 1 IoCs
Processes:
rat.exepid process 3888 rat.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs
Processes:
flow ioc 30 raw.githubusercontent.com 31 raw.githubusercontent.com 32 raw.githubusercontent.com -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
Processes:
schtasks.exeschtasks.exepid process 4808 schtasks.exe 4820 schtasks.exe -
Delays execution with timeout.exe 1 IoCs
Processes:
timeout.exepid process 3252 timeout.exe -
Enumerates processes with tasklist 1 TTPs 1 IoCs
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Suspicious behavior: EnumeratesProcesses 19 IoCs
Processes:
rat.exepid process 3888 rat.exe 3888 rat.exe 3888 rat.exe 3888 rat.exe 3888 rat.exe 3888 rat.exe 3888 rat.exe 3888 rat.exe 3888 rat.exe 3888 rat.exe 3888 rat.exe 3888 rat.exe 3888 rat.exe 3888 rat.exe 3888 rat.exe 3888 rat.exe 3888 rat.exe 3888 rat.exe 3888 rat.exe -
Suspicious use of AdjustPrivilegeToken 4 IoCs
Processes:
a.exetasklist.exerat.exedescription pid process Token: SeDebugPrivilege 4856 a.exe Token: SeDebugPrivilege 4944 tasklist.exe Token: SeDebugPrivilege 3888 rat.exe Token: SeDebugPrivilege 3888 rat.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
rat.exepid process 3888 rat.exe -
Suspicious use of WriteProcessMemory 14 IoCs
Processes:
a.execmd.exerat.exedescription pid process target process PID 4856 wrote to memory of 4808 4856 a.exe schtasks.exe PID 4856 wrote to memory of 4808 4856 a.exe schtasks.exe PID 4856 wrote to memory of 2568 4856 a.exe cmd.exe PID 4856 wrote to memory of 2568 4856 a.exe cmd.exe PID 2568 wrote to memory of 4944 2568 cmd.exe tasklist.exe PID 2568 wrote to memory of 4944 2568 cmd.exe tasklist.exe PID 2568 wrote to memory of 3076 2568 cmd.exe find.exe PID 2568 wrote to memory of 3076 2568 cmd.exe find.exe PID 2568 wrote to memory of 3252 2568 cmd.exe timeout.exe PID 2568 wrote to memory of 3252 2568 cmd.exe timeout.exe PID 2568 wrote to memory of 3888 2568 cmd.exe rat.exe PID 2568 wrote to memory of 3888 2568 cmd.exe rat.exe PID 3888 wrote to memory of 4820 3888 rat.exe schtasks.exe PID 3888 wrote to memory of 4820 3888 rat.exe schtasks.exe -
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\a.exe"C:\Users\Admin\AppData\Local\Temp\a.exe"1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4856 -
C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /f /sc ONLOGON /RL HIGHEST /tn "Chrome Update" /tr "C:\Users\CyberEye\rat.exe"2⤵
- Creates scheduled task(s)
PID:4808
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C C:\Users\Admin\AppData\Local\Temp\tmp7E67.tmp.bat & Del C:\Users\Admin\AppData\Local\Temp\tmp7E67.tmp.bat2⤵
- Suspicious use of WriteProcessMemory
PID:2568 -
C:\Windows\system32\tasklist.exeTasklist /fi "PID eq 4856"3⤵
- Enumerates processes with tasklist
- Suspicious use of AdjustPrivilegeToken
PID:4944
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C:\Windows\system32\find.exefind ":"3⤵PID:3076
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C:\Windows\system32\timeout.exeTimeout /T 1 /Nobreak3⤵
- Delays execution with timeout.exe
PID:3252
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C:\Users\CyberEye\rat.exe"rat.exe"3⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3888 -
C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /f /sc ONLOGON /RL HIGHEST /tn "Chrome Update" /tr "C:\Users\CyberEye\rat.exe"4⤵
- Creates scheduled task(s)
PID:4820
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
178B
MD538bc7f8bffd04c37353824eb9a310dd8
SHA12d69a7acc42b57f7e227cb89def421b45b778bc5
SHA256890f14fce3ce9b493420c9f582349f48b06d1989cee179c227d577ef7a37599c
SHA51278a4ec1d11693e186191f36ab932f31d045ffe7be199625b9c1d4da087c5349be648438f23e6198a950ffcca0d3cd55e97c94d445078e4b9a26a7206486de145
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Filesize
143KB
MD574f22ec8451a5d788ee312e2b637519c
SHA1a7bd09f6f3d7f9b3ec33b5d4c2787223459d1fc0
SHA25648614dc3fd49968db9c35b840a6609f397f2f1813daa7c56b659036edf82f2e2
SHA5125b356e4811c58bcede2c3a5a0614e40049ef2a68c63c76fa78f612441d1ca9e1200f7a0544ffbca66ab4e0668fd0ec196bf0cdbff60ff7097c5f476b1675492b