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, 19:31
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/2876-0-0x0000000000170000-0x0000000000186000-memory.dmp asyncrat behavioral2/files/0x0003000000022763-13.dat asyncrat behavioral2/memory/3704-16-0x0000000002A00000-0x0000000002A10000-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-1-5-21-983843758-932321429-1636175382-1000\Control Panel\International\Geo\Nation UniAccChecker.exe -
Executes dropped EXE 1 IoCs
pid Process 3704 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 1464 schtasks.exe -
Delays execution with timeout.exe 1 IoCs
pid Process 1188 timeout.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 2876 UniAccChecker.exe 3704 GoogleChromeUpd.exe 3704 GoogleChromeUpd.exe 3704 GoogleChromeUpd.exe 3704 GoogleChromeUpd.exe 3704 GoogleChromeUpd.exe 3704 GoogleChromeUpd.exe 3704 GoogleChromeUpd.exe 3704 GoogleChromeUpd.exe 3704 GoogleChromeUpd.exe 3704 GoogleChromeUpd.exe 3704 GoogleChromeUpd.exe 3704 GoogleChromeUpd.exe 3704 GoogleChromeUpd.exe 3704 GoogleChromeUpd.exe 3704 GoogleChromeUpd.exe 3704 GoogleChromeUpd.exe 3704 GoogleChromeUpd.exe 3704 GoogleChromeUpd.exe 3704 GoogleChromeUpd.exe 3704 GoogleChromeUpd.exe 3704 GoogleChromeUpd.exe 3704 GoogleChromeUpd.exe 3704 GoogleChromeUpd.exe 3704 GoogleChromeUpd.exe 3704 GoogleChromeUpd.exe -
Suspicious use of AdjustPrivilegeToken 4 IoCs
description pid Process Token: SeDebugPrivilege 2876 UniAccChecker.exe Token: SeDebugPrivilege 2876 UniAccChecker.exe Token: SeDebugPrivilege 3704 GoogleChromeUpd.exe Token: SeDebugPrivilege 3704 GoogleChromeUpd.exe -
Suspicious use of WriteProcessMemory 10 IoCs
description pid Process procid_target PID 2876 wrote to memory of 1568 2876 UniAccChecker.exe 89 PID 2876 wrote to memory of 1568 2876 UniAccChecker.exe 89 PID 2876 wrote to memory of 1908 2876 UniAccChecker.exe 90 PID 2876 wrote to memory of 1908 2876 UniAccChecker.exe 90 PID 1908 wrote to memory of 1188 1908 cmd.exe 93 PID 1908 wrote to memory of 1188 1908 cmd.exe 93 PID 1568 wrote to memory of 1464 1568 cmd.exe 94 PID 1568 wrote to memory of 1464 1568 cmd.exe 94 PID 1908 wrote to memory of 3704 1908 cmd.exe 98 PID 1908 wrote to memory of 3704 1908 cmd.exe 98 -
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:2876 -
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:1568 -
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:1464
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp73F7.tmp.bat""2⤵
- Suspicious use of WriteProcessMemory
PID:1908 -
C:\Windows\system32\timeout.exetimeout 33⤵
- Delays execution with timeout.exe
PID:1188
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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:3704
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
159B
MD5376c91afa636a6996adf4a80085dabfa
SHA1241892093c72e04faed83a30c7f3a32deb851762
SHA2567add53f8fa1a12b78c77da14970697b5b890f343d8947300eaa32d405ec660cc
SHA512fdc3aa72cc4fd3aae50c74337bc1705a59e155b339ffc5d20dc271bdfa37b1187592eef8f82a34878d82f23fc4b9b99abecfded5e574c8fa5b63e2f913ba81cb
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Filesize
63KB
MD5e40435c6df1a16aad70fcb8582228bc3
SHA18d5a1a1213b6680cfe3cb59aa0383ae8a91d5141
SHA2566148afd882ab17b41c7e5d92569d55426ef18bec0c45335529ca66c0ae19efdd
SHA512f7e33a06735e0297c06d3875010bc065471ce44ff86466cdf36c7773f4c3b1e9aef96c00efbf162976f695e50f06e7729f995a63a9de6335e0dcb36e7a19da2b