Analysis
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max time kernel
150s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
22/01/2024, 19:32
Behavioral task
behavioral1
Sample
UniAccChecker.exe
Resource
win7-20231215-en
General
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Target
UniAccChecker.exe
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Size
63KB
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MD5
e40435c6df1a16aad70fcb8582228bc3
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SHA1
8d5a1a1213b6680cfe3cb59aa0383ae8a91d5141
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SHA256
6148afd882ab17b41c7e5d92569d55426ef18bec0c45335529ca66c0ae19efdd
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SHA512
f7e33a06735e0297c06d3875010bc065471ce44ff86466cdf36c7773f4c3b1e9aef96c00efbf162976f695e50f06e7729f995a63a9de6335e0dcb36e7a19da2b
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SSDEEP
1536:UJ/t/dSJYUbdh9IM1b+uFg6CinpqKmY7:U3/YYUbd3Zg6Ci0z
Malware Config
Extracted
asyncrat
Default
127.0.0.1:3232
吾吾owlΒiH1XNبmש吉E迪yاqCX
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delay
1
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install
true
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install_file
GoogleChromeUpd.exe
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install_folder
%AppData%
Signatures
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Async RAT payload 3 IoCs
resource yara_rule behavioral2/memory/2148-0-0x0000000000050000-0x0000000000066000-memory.dmp asyncrat behavioral2/files/0x0003000000022e6a-11.dat asyncrat behavioral2/memory/4148-17-0x0000000002B50000-0x0000000002B60000-memory.dmp asyncrat -
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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation UniAccChecker.exe -
Executes dropped EXE 1 IoCs
pid Process 4148 GoogleChromeUpd.exe -
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 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 1168 schtasks.exe -
Delays execution with timeout.exe 1 IoCs
pid Process 4248 timeout.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 2148 UniAccChecker.exe 4148 GoogleChromeUpd.exe 4148 GoogleChromeUpd.exe 4148 GoogleChromeUpd.exe 4148 GoogleChromeUpd.exe 4148 GoogleChromeUpd.exe 4148 GoogleChromeUpd.exe 4148 GoogleChromeUpd.exe 4148 GoogleChromeUpd.exe 4148 GoogleChromeUpd.exe 4148 GoogleChromeUpd.exe 4148 GoogleChromeUpd.exe -
Suspicious use of AdjustPrivilegeToken 4 IoCs
description pid Process Token: SeDebugPrivilege 2148 UniAccChecker.exe Token: SeDebugPrivilege 2148 UniAccChecker.exe Token: SeDebugPrivilege 4148 GoogleChromeUpd.exe Token: SeDebugPrivilege 4148 GoogleChromeUpd.exe -
Suspicious use of WriteProcessMemory 10 IoCs
description pid Process procid_target PID 2148 wrote to memory of 3096 2148 UniAccChecker.exe 91 PID 2148 wrote to memory of 3096 2148 UniAccChecker.exe 91 PID 2148 wrote to memory of 4168 2148 UniAccChecker.exe 92 PID 2148 wrote to memory of 4168 2148 UniAccChecker.exe 92 PID 3096 wrote to memory of 1168 3096 cmd.exe 95 PID 3096 wrote to memory of 1168 3096 cmd.exe 95 PID 4168 wrote to memory of 4248 4168 cmd.exe 96 PID 4168 wrote to memory of 4248 4168 cmd.exe 96 PID 4168 wrote to memory of 4148 4168 cmd.exe 100 PID 4168 wrote to memory of 4148 4168 cmd.exe 100 -
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\UniAccChecker.exe"C:\Users\Admin\AppData\Local\Temp\UniAccChecker.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2148 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "GoogleChromeUpd" /tr '"C:\Users\Admin\AppData\Roaming\GoogleChromeUpd.exe"' & exit2⤵
- Suspicious use of WriteProcessMemory
PID:3096 -
C:\Windows\system32\schtasks.exeschtasks /create /f /sc onlogon /rl highest /tn "GoogleChromeUpd" /tr '"C:\Users\Admin\AppData\Roaming\GoogleChromeUpd.exe"'3⤵
- Creates scheduled task(s)
PID:1168
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp5A55.tmp.bat""2⤵
- Suspicious use of WriteProcessMemory
PID:4168 -
C:\Windows\system32\timeout.exetimeout 33⤵
- Delays execution with timeout.exe
PID:4248
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C:\Users\Admin\AppData\Roaming\GoogleChromeUpd.exe"C:\Users\Admin\AppData\Roaming\GoogleChromeUpd.exe"3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4148
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
159B
MD5e4152776a243b5dcbabdc9c30ef6a145
SHA19e8532a01ac3a18c0790d7f31880ee8096fc6c22
SHA2567f0a9b833e6291747e7599a598def4b5336c34bd2e3e5aa8b2bb893531253ced
SHA5123de0cd9c8b02fc70cb5ba77e50875978b08c99a6734ff38442659468b99bed4504e8b70935a0717e534922bc6c26de3fb59ecdf108b5802df1cbda1b3f9febd6
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Filesize
63KB
MD5e40435c6df1a16aad70fcb8582228bc3
SHA18d5a1a1213b6680cfe3cb59aa0383ae8a91d5141
SHA2566148afd882ab17b41c7e5d92569d55426ef18bec0c45335529ca66c0ae19efdd
SHA512f7e33a06735e0297c06d3875010bc065471ce44ff86466cdf36c7773f4c3b1e9aef96c00efbf162976f695e50f06e7729f995a63a9de6335e0dcb36e7a19da2b