Analysis
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max time kernel
64s -
max time network
148s -
platform
windows10-2004_x64 -
resource
win10v2004-20230220-en -
resource tags
arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system -
submitted
10-04-2023 07:15
Behavioral task
behavioral1
Sample
tmp.exe
Resource
win7-20230220-en
General
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Target
tmp.exe
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Size
57KB
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MD5
7422d3af2fc6d1f7ecef432d86353456
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SHA1
fd470052846183329edd22a923d070ad71ba79cc
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SHA256
ba0b8d476dc0152aa59cfc15b1a93fc039baab07cdf95677871d9157488babe4
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SHA512
24baf349ae705d0d88571a79a5d449f3ee4bb3e9f751d44a26f263298d69e5872ee9d8e6f4b150dd24a669f534b67a1de184466ba25399b6d9da68537693063a
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SSDEEP
1536:aIUw2xx5XbyB/licYH6GlQZXRwA2IJYkbHTH1lmK9Xx:aIUw2xx5Xb0/EcYH6GlQEANCkbHTNVx
Malware Config
Extracted
asyncrat
| Edit 3LOSH RAT
A&H
aboreda.linkpc.net:6666
AsyncMutex_6SI8OkPnk
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delay
10
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install
true
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install_file
WindowsUpdate.exe
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install_folder
%AppData%
Signatures
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Async RAT payload 3 IoCs
Processes:
resource yara_rule behavioral2/memory/384-133-0x0000000000290000-0x00000000002A4000-memory.dmp asyncrat C:\Users\Admin\AppData\Roaming\WindowsUpdate.exe asyncrat C:\Users\Admin\AppData\Roaming\WindowsUpdate.exe asyncrat -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
tmp.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Control Panel\International\Geo\Nation tmp.exe -
Executes dropped EXE 1 IoCs
Processes:
WindowsUpdate.exepid process 1452 WindowsUpdate.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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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.
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Delays execution with timeout.exe 1 IoCs
Processes:
timeout.exepid process 1272 timeout.exe -
Suspicious behavior: EnumeratesProcesses 23 IoCs
Processes:
tmp.exepid process 384 tmp.exe 384 tmp.exe 384 tmp.exe 384 tmp.exe 384 tmp.exe 384 tmp.exe 384 tmp.exe 384 tmp.exe 384 tmp.exe 384 tmp.exe 384 tmp.exe 384 tmp.exe 384 tmp.exe 384 tmp.exe 384 tmp.exe 384 tmp.exe 384 tmp.exe 384 tmp.exe 384 tmp.exe 384 tmp.exe 384 tmp.exe 384 tmp.exe 384 tmp.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
tmp.exeWindowsUpdate.exedescription pid process Token: SeDebugPrivilege 384 tmp.exe Token: SeDebugPrivilege 1452 WindowsUpdate.exe -
Suspicious use of WriteProcessMemory 15 IoCs
Processes:
tmp.execmd.execmd.exedescription pid process target process PID 384 wrote to memory of 3180 384 tmp.exe cmd.exe PID 384 wrote to memory of 3180 384 tmp.exe cmd.exe PID 384 wrote to memory of 3180 384 tmp.exe cmd.exe PID 384 wrote to memory of 4768 384 tmp.exe cmd.exe PID 384 wrote to memory of 4768 384 tmp.exe cmd.exe PID 384 wrote to memory of 4768 384 tmp.exe cmd.exe PID 4768 wrote to memory of 1272 4768 cmd.exe timeout.exe PID 4768 wrote to memory of 1272 4768 cmd.exe timeout.exe PID 4768 wrote to memory of 1272 4768 cmd.exe timeout.exe PID 3180 wrote to memory of 4200 3180 cmd.exe schtasks.exe PID 3180 wrote to memory of 4200 3180 cmd.exe schtasks.exe PID 3180 wrote to memory of 4200 3180 cmd.exe schtasks.exe PID 4768 wrote to memory of 1452 4768 cmd.exe WindowsUpdate.exe PID 4768 wrote to memory of 1452 4768 cmd.exe WindowsUpdate.exe PID 4768 wrote to memory of 1452 4768 cmd.exe WindowsUpdate.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\tmp.exe"C:\Users\Admin\AppData\Local\Temp\tmp.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "WindowsUpdate" /tr '"C:\Users\Admin\AppData\Roaming\WindowsUpdate.exe"' & exit2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exeschtasks /create /f /sc onlogon /rl highest /tn "WindowsUpdate" /tr '"C:\Users\Admin\AppData\Roaming\WindowsUpdate.exe"'3⤵
- Creates scheduled task(s)
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C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpB366.tmp.bat""2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\timeout.exetimeout 33⤵
- Delays execution with timeout.exe
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C:\Users\Admin\AppData\Roaming\WindowsUpdate.exe"C:\Users\Admin\AppData\Roaming\WindowsUpdate.exe"3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\tmpB366.tmp.batFilesize
157B
MD52e9a429a29f55de65dee5e50de45b9d5
SHA1178d0449e03d65ab93d6f7d5e8564db116bb3d63
SHA256583a5ee750f2f612522e360e8cc58c70797ceaed5f044fede51baccfa1a168f2
SHA5126dc9ef060dcbf53468b6055fc0c02e527a966917d73268ce477569d746ac5f621bf7e574154b4f534c2029899921148cd21cc4cf587041e4efbfce54316b52cb
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C:\Users\Admin\AppData\Roaming\WindowsUpdate.exeFilesize
57KB
MD57422d3af2fc6d1f7ecef432d86353456
SHA1fd470052846183329edd22a923d070ad71ba79cc
SHA256ba0b8d476dc0152aa59cfc15b1a93fc039baab07cdf95677871d9157488babe4
SHA51224baf349ae705d0d88571a79a5d449f3ee4bb3e9f751d44a26f263298d69e5872ee9d8e6f4b150dd24a669f534b67a1de184466ba25399b6d9da68537693063a
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C:\Users\Admin\AppData\Roaming\WindowsUpdate.exeFilesize
57KB
MD57422d3af2fc6d1f7ecef432d86353456
SHA1fd470052846183329edd22a923d070ad71ba79cc
SHA256ba0b8d476dc0152aa59cfc15b1a93fc039baab07cdf95677871d9157488babe4
SHA51224baf349ae705d0d88571a79a5d449f3ee4bb3e9f751d44a26f263298d69e5872ee9d8e6f4b150dd24a669f534b67a1de184466ba25399b6d9da68537693063a
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memory/384-133-0x0000000000290000-0x00000000002A4000-memory.dmpFilesize
80KB
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memory/384-134-0x00000000027C0000-0x00000000027D0000-memory.dmpFilesize
64KB
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memory/384-135-0x0000000004DC0000-0x0000000004E5C000-memory.dmpFilesize
624KB
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memory/1452-144-0x0000000005950000-0x0000000005960000-memory.dmpFilesize
64KB
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memory/1452-145-0x00000000062F0000-0x0000000006894000-memory.dmpFilesize
5.6MB
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memory/1452-146-0x0000000005DC0000-0x0000000005E26000-memory.dmpFilesize
408KB
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memory/1452-147-0x0000000005950000-0x0000000005960000-memory.dmpFilesize
64KB