asyncrat | 715c1fbf243cdd37c2e7f5cabe0093c366589ed477c4bb76348936fe26316579

Analysis

max time kernel
150s
max time network
32s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
21/03/2023, 13:26

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General

Target
9a8f8b44910d4c35a64244354966ce7bdd3bdff9189feee1d8e98b094c855138.exe
Size 309KB
Sample230321-qphszaae33
SHA256 9a8f8b44910d4c35a64244354966ce7bdd3bdff9189feee1d8e98b094c855138
MD5 66b5dabec55deb65ac6ecdbb385c9181
SHA1 8485dc1ecf501916e3850521e81112fccdfaa110
SHA512 28ff7068f0d8c1d7e0de8a6129d64db7d566868dc93e9bb8ba4de737d11483f8dd52edc6f67799cdf3396109061835bce472a2123477bb9304f1ff902ffdffb8
SSDEEP 3072:WHuQETR+J2IoYcOXb/CPJDjSIU1dA+h9b3dA2/S1dAK3dA/Sf6CwCPuikC0oXz2T:ouQ1MIPXXbaQIDp5OqfO
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

127.0.0.1:6606
127.0.0.1:7707
127.0.0.1:8808
127.0.0.1:1177
jntrojan.ddns.net:6606
jntrojan.ddns.net:7707
jntrojan.ddns.net:8808
jntrojan.ddns.net:1177

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
windows.exe
install_folder
%Temp%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Async RAT payload 6 IoCs

rat

resource	yara_rule
behavioral1/memory/1100-54-0x0000000000FD0000-0x0000000001024000-memory.dmp	asyncrat
behavioral1/files/0x00090000000130e0-65.dat	asyncrat
behavioral1/files/0x00090000000130e0-66.dat	asyncrat
behavioral1/files/0x00090000000130e0-67.dat	asyncrat
behavioral1/memory/656-68-0x0000000001020000-0x0000000001074000-memory.dmp	asyncrat
behavioral1/memory/656-70-0x0000000004C70000-0x0000000004CB0000-memory.dmp	asyncrat

Executes dropped EXE 1 IoCs

pid	Process
656	windows.exe

Loads dropped DLL 1 IoCs

pid	Process
1380	cmd.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
756	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
364	timeout.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1100	9a8f8b44910d4c35a64244354966ce7bdd3bdff9189feee1d8e98b094c855138.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1100	9a8f8b44910d4c35a64244354966ce7bdd3bdff9189feee1d8e98b094c855138.exe
Token: SeDebugPrivilege	656	windows.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1100 wrote to memory of 1912	1100	9a8f8b44910d4c35a64244354966ce7bdd3bdff9189feee1d8e98b094c855138.exe	26
PID 1100 wrote to memory of 1912	1100	9a8f8b44910d4c35a64244354966ce7bdd3bdff9189feee1d8e98b094c855138.exe	26
PID 1100 wrote to memory of 1912	1100	9a8f8b44910d4c35a64244354966ce7bdd3bdff9189feee1d8e98b094c855138.exe	26
PID 1100 wrote to memory of 1912	1100	9a8f8b44910d4c35a64244354966ce7bdd3bdff9189feee1d8e98b094c855138.exe	26
PID 1100 wrote to memory of 1380	1100	9a8f8b44910d4c35a64244354966ce7bdd3bdff9189feee1d8e98b094c855138.exe	29
PID 1100 wrote to memory of 1380	1100	9a8f8b44910d4c35a64244354966ce7bdd3bdff9189feee1d8e98b094c855138.exe	29
PID 1100 wrote to memory of 1380	1100	9a8f8b44910d4c35a64244354966ce7bdd3bdff9189feee1d8e98b094c855138.exe	29
PID 1100 wrote to memory of 1380	1100	9a8f8b44910d4c35a64244354966ce7bdd3bdff9189feee1d8e98b094c855138.exe	29
PID 1912 wrote to memory of 756	1912	cmd.exe	30
PID 1912 wrote to memory of 756	1912	cmd.exe	30
PID 1912 wrote to memory of 756	1912	cmd.exe	30
PID 1912 wrote to memory of 756	1912	cmd.exe	30
PID 1380 wrote to memory of 364	1380	cmd.exe	31
PID 1380 wrote to memory of 364	1380	cmd.exe	31
PID 1380 wrote to memory of 364	1380	cmd.exe	31
PID 1380 wrote to memory of 364	1380	cmd.exe	31
PID 1380 wrote to memory of 656	1380	cmd.exe	32
PID 1380 wrote to memory of 656	1380	cmd.exe	32
PID 1380 wrote to memory of 656	1380	cmd.exe	32
PID 1380 wrote to memory of 656	1380	cmd.exe	32
PID 1380 wrote to memory of 656	1380	cmd.exe	32
PID 1380 wrote to memory of 656	1380	cmd.exe	32
PID 1380 wrote to memory of 656	1380	cmd.exe	32

C:\Users\Admin\AppData\Local\Temp\9a8f8b44910d4c35a64244354966ce7bdd3bdff9189feee1d8e98b094c855138.exe
"C:\Users\Admin\AppData\Local\Temp\9a8f8b44910d4c35a64244354966ce7bdd3bdff9189feee1d8e98b094c855138.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1100
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "windows" /tr '"C:\Users\Admin\AppData\Local\Temp\windows.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1912
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "windows" /tr '"C:\Users\Admin\AppData\Local\Temp\windows.exe"'
    3⤵
    - Creates scheduled task(s)
    PID:756
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpAC09.tmp.bat""
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1380
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:364
- - C:\Users\Admin\AppData\Local\Temp\windows.exe
    "C:\Users\Admin\AppData\Local\Temp\windows.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:656

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

tmpAC09.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpAC09.tmp.bat
Size 154B
SHA256 8c3dfd27011ce456c989a1f8ebcb023db449af013a6e3b894fc7c5ba8b003494
MD5 52c5bdab455c24867afc562414483c94
SHA1 155cd1a9be6ce083a931023c99064aa6cc6108ae
SHA512 388dab6a3db1793909c4d6821f95c26f0a36f72e4d9e227b424d7e15abc7fc874f5c1cc5eed92dbcc27433444defbdd3799a1cc6f69fbd69a2973b3f8ab062db
MD5 SHA1 SHA512

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tmpAC09.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpAC09.tmp.bat
Size 154B
SHA256 8c3dfd27011ce456c989a1f8ebcb023db449af013a6e3b894fc7c5ba8b003494
MD5 52c5bdab455c24867afc562414483c94
SHA1 155cd1a9be6ce083a931023c99064aa6cc6108ae
SHA512 388dab6a3db1793909c4d6821f95c26f0a36f72e4d9e227b424d7e15abc7fc874f5c1cc5eed92dbcc27433444defbdd3799a1cc6f69fbd69a2973b3f8ab062db
MD5 SHA1 SHA512

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windows.exe

Path C:\Users\Admin\AppData\Local\Temp\windows.exe
Size 309KB
SHA256 9a8f8b44910d4c35a64244354966ce7bdd3bdff9189feee1d8e98b094c855138
MD5 66b5dabec55deb65ac6ecdbb385c9181
SHA1 8485dc1ecf501916e3850521e81112fccdfaa110
SHA512 28ff7068f0d8c1d7e0de8a6129d64db7d566868dc93e9bb8ba4de737d11483f8dd52edc6f67799cdf3396109061835bce472a2123477bb9304f1ff902ffdffb8
SSDEEP 3072:WHuQETR+J2IoYcOXb/CPJDjSIU1dA+h9b3dA2/S1dAK3dA/Sf6CwCPuikC0oXz2T:ouQ1MIPXXbaQIDp5OqfO
MD5 SHA1 SHA512 SSDEEP

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windows.exe

Path C:\Users\Admin\AppData\Local\Temp\windows.exe
Size 309KB
SHA256 9a8f8b44910d4c35a64244354966ce7bdd3bdff9189feee1d8e98b094c855138
MD5 66b5dabec55deb65ac6ecdbb385c9181
SHA1 8485dc1ecf501916e3850521e81112fccdfaa110
SHA512 28ff7068f0d8c1d7e0de8a6129d64db7d566868dc93e9bb8ba4de737d11483f8dd52edc6f67799cdf3396109061835bce472a2123477bb9304f1ff902ffdffb8
SSDEEP 3072:WHuQETR+J2IoYcOXb/CPJDjSIU1dA+h9b3dA2/S1dAK3dA/Sf6CwCPuikC0oXz2T:ouQ1MIPXXbaQIDp5OqfO
MD5 SHA1 SHA512 SSDEEP

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windows.exe

Path \Users\Admin\AppData\Local\Temp\windows.exe
Size 309KB
SHA256 9a8f8b44910d4c35a64244354966ce7bdd3bdff9189feee1d8e98b094c855138
MD5 66b5dabec55deb65ac6ecdbb385c9181
SHA1 8485dc1ecf501916e3850521e81112fccdfaa110
SHA512 28ff7068f0d8c1d7e0de8a6129d64db7d566868dc93e9bb8ba4de737d11483f8dd52edc6f67799cdf3396109061835bce472a2123477bb9304f1ff902ffdffb8
SSDEEP 3072:WHuQETR+J2IoYcOXb/CPJDjSIU1dA+h9b3dA2/S1dAK3dA/Sf6CwCPuikC0oXz2T:ouQ1MIPXXbaQIDp5OqfO
MD5 SHA1 SHA512 SSDEEP

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memory/656-68-0x0000000001020000-0x0000000001074000-memory.dmp

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memory/656-69-0x0000000004C70000-0x0000000004CB0000-memory.dmp

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memory/656-70-0x0000000004C70000-0x0000000004CB0000-memory.dmp

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memory/1100-54-0x0000000000FD0000-0x0000000001024000-memory.dmp

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memory/1100-55-0x0000000000C50000-0x0000000000C90000-memory.dmp

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