Analysis
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max time kernel
118s -
max time network
169s -
platform
windows7_x64 -
resource
win7-en-20210920 -
submitted
29-10-2021 09:14
Static task
static1
Behavioral task
behavioral1
Sample
Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exe
Resource
win7-en-20210920
General
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Target
Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exe
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Size
251KB
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MD5
8adb35800f43e4f023e9e50b5a5e7eb0
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SHA1
81abe91633dab20e61e69902428a0909e9a25f09
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SHA256
5639c11ec67442443212c1b9771cf3462670e03f1116d0caca38dae306491de4
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SHA512
359b2913be167eec27ca5a27f0bf41256d32a7c250aa902e3daf4909e1cbea03a530c35c58ceed50c50e450c3f626e11aa4cd01657e76ac1486cfc483a1c8e98
Malware Config
Extracted
asyncrat
0.5.7B
Default
fresh01.ddns.net:2245
fresh01.ddns.net:2256
fresh01.ddns.net:2257
AsyncMutex_6SI8OkPnk
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anti_vm
false
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bsod
false
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delay
3
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install
false
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install_folder
%AppData%
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pastebin_config
null
Signatures
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suricata: ET MALWARE Observed Malicious SSL Cert (AsyncRAT Server)
suricata: ET MALWARE Observed Malicious SSL Cert (AsyncRAT Server)
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Async RAT payload 5 IoCs
Processes:
resource yara_rule behavioral1/memory/852-62-0x0000000000400000-0x0000000000412000-memory.dmp asyncrat behavioral1/memory/852-63-0x0000000000400000-0x0000000000412000-memory.dmp asyncrat behavioral1/memory/852-64-0x0000000000400000-0x0000000000412000-memory.dmp asyncrat behavioral1/memory/852-65-0x000000000040C74E-mapping.dmp asyncrat behavioral1/memory/852-66-0x0000000000400000-0x0000000000412000-memory.dmp asyncrat -
Suspicious use of SetThreadContext 1 IoCs
Processes:
Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exedescription pid process target process PID 1812 set thread context of 852 1812 Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exe Confirmation Transfer Copy MT103-Ref-088091030101_PDF.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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Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exepid process 1812 Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exe 1812 Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exeConfirmation Transfer Copy MT103-Ref-088091030101_PDF.exedescription pid process Token: SeDebugPrivilege 1812 Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exe Token: SeDebugPrivilege 852 Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exe -
Suspicious use of WriteProcessMemory 13 IoCs
Processes:
Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exedescription pid process target process PID 1812 wrote to memory of 1656 1812 Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exe schtasks.exe PID 1812 wrote to memory of 1656 1812 Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exe schtasks.exe PID 1812 wrote to memory of 1656 1812 Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exe schtasks.exe PID 1812 wrote to memory of 1656 1812 Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exe schtasks.exe PID 1812 wrote to memory of 852 1812 Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exe Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exe PID 1812 wrote to memory of 852 1812 Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exe Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exe PID 1812 wrote to memory of 852 1812 Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exe Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exe PID 1812 wrote to memory of 852 1812 Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exe Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exe PID 1812 wrote to memory of 852 1812 Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exe Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exe PID 1812 wrote to memory of 852 1812 Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exe Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exe PID 1812 wrote to memory of 852 1812 Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exe Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exe PID 1812 wrote to memory of 852 1812 Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exe Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exe PID 1812 wrote to memory of 852 1812 Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exe Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exe"C:\Users\Admin\AppData\Local\Temp\Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\AhRhGvu" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA007.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exe"C:\Users\Admin\AppData\Local\Temp\Confirmation Transfer Copy MT103-Ref-088091030101_PDF.exe"2⤵
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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memory/852-64-0x0000000000400000-0x0000000000412000-memory.dmpFilesize
72KB
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memory/852-63-0x0000000000400000-0x0000000000412000-memory.dmpFilesize
72KB
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memory/852-69-0x0000000000CB0000-0x0000000000CB1000-memory.dmpFilesize
4KB
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memory/852-68-0x0000000075A71000-0x0000000075A73000-memory.dmpFilesize
8KB
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memory/852-66-0x0000000000400000-0x0000000000412000-memory.dmpFilesize
72KB
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memory/852-60-0x0000000000400000-0x0000000000412000-memory.dmpFilesize
72KB
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memory/852-62-0x0000000000400000-0x0000000000412000-memory.dmpFilesize
72KB
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memory/852-61-0x0000000000400000-0x0000000000412000-memory.dmpFilesize
72KB
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memory/852-65-0x000000000040C74E-mapping.dmp
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memory/1656-59-0x0000000000000000-mapping.dmp
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memory/1812-54-0x0000000000D70000-0x0000000000D71000-memory.dmpFilesize
4KB
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memory/1812-56-0x0000000004250000-0x0000000004251000-memory.dmpFilesize
4KB
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memory/1812-58-0x0000000000B80000-0x0000000000BAD000-memory.dmpFilesize
180KB
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memory/1812-57-0x00000000006F0000-0x00000000006F6000-memory.dmpFilesize
24KB