Analysis
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max time kernel
150s -
max time network
125s -
platform
windows7_x64 -
resource
win7-20231215-en -
resource tags
arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-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 behavioral1/memory/2252-0-0x0000000000E10000-0x0000000000E26000-memory.dmp asyncrat behavioral1/files/0x000c00000001492c-16.dat asyncrat behavioral1/memory/2316-18-0x00000000008F0000-0x0000000000906000-memory.dmp asyncrat -
Executes dropped EXE 1 IoCs
pid Process 2316 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 3004 schtasks.exe -
Delays execution with timeout.exe 1 IoCs
pid Process 2700 timeout.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 2252 UniAccChecker.exe 2252 UniAccChecker.exe 2252 UniAccChecker.exe 2252 UniAccChecker.exe 2252 UniAccChecker.exe 2252 UniAccChecker.exe 2252 UniAccChecker.exe 2252 UniAccChecker.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe 2316 GoogleChromeUpd.exe -
Suspicious use of AdjustPrivilegeToken 4 IoCs
description pid Process Token: SeDebugPrivilege 2252 UniAccChecker.exe Token: SeDebugPrivilege 2252 UniAccChecker.exe Token: SeDebugPrivilege 2316 GoogleChromeUpd.exe Token: SeDebugPrivilege 2316 GoogleChromeUpd.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 2252 wrote to memory of 2708 2252 UniAccChecker.exe 29 PID 2252 wrote to memory of 2708 2252 UniAccChecker.exe 29 PID 2252 wrote to memory of 2708 2252 UniAccChecker.exe 29 PID 2252 wrote to memory of 2836 2252 UniAccChecker.exe 31 PID 2252 wrote to memory of 2836 2252 UniAccChecker.exe 31 PID 2252 wrote to memory of 2836 2252 UniAccChecker.exe 31 PID 2708 wrote to memory of 3004 2708 cmd.exe 33 PID 2708 wrote to memory of 3004 2708 cmd.exe 33 PID 2708 wrote to memory of 3004 2708 cmd.exe 33 PID 2836 wrote to memory of 2700 2836 cmd.exe 34 PID 2836 wrote to memory of 2700 2836 cmd.exe 34 PID 2836 wrote to memory of 2700 2836 cmd.exe 34 PID 2836 wrote to memory of 2316 2836 cmd.exe 35 PID 2836 wrote to memory of 2316 2836 cmd.exe 35 PID 2836 wrote to memory of 2316 2836 cmd.exe 35 -
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⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2252 -
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:2708 -
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:3004
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C:\Windows\system32\cmd.execmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp475C.tmp.bat""2⤵
- Suspicious use of WriteProcessMemory
PID:2836 -
C:\Windows\system32\timeout.exetimeout 33⤵
- Delays execution with timeout.exe
PID:2700
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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:2316
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
159B
MD545f66034fdf30f45adbdc385d5e27095
SHA1b17a30d1ef671e2b505256497fa533e76c4ad2b2
SHA256bc4645b12d1acd6d2e18536a1d933739635ecaf0fc5c2c7bec2d9d56c1d89948
SHA512777f05cfd73539cf12bb1b5c3a7ff660bd0254d15573e28b057dc48d8a901c82310474df4e0c0aa9212303fe9aeaa2a8153e06237b817d20e8758838fabe529f
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Filesize
63KB
MD5e40435c6df1a16aad70fcb8582228bc3
SHA18d5a1a1213b6680cfe3cb59aa0383ae8a91d5141
SHA2566148afd882ab17b41c7e5d92569d55426ef18bec0c45335529ca66c0ae19efdd
SHA512f7e33a06735e0297c06d3875010bc065471ce44ff86466cdf36c7773f4c3b1e9aef96c00efbf162976f695e50f06e7729f995a63a9de6335e0dcb36e7a19da2b