asyncrat | ba4ffe8c2d64162b9f149242ecb7309a35886d05f5360da9e3e91a261a68c2ae

General

Target

Copy.exe
Size

1.1MB
MD5

520ba96d18722d0d6dcc2f0250d52998
SHA1

b2db2f9fa0fd3a2c74ef0b10dc684737eac9f3d9
SHA256

ba4ffe8c2d64162b9f149242ecb7309a35886d05f5360da9e3e91a261a68c2ae
SHA512

44510d3088c495e49c0f3c71defaf7b244146424413a6432ed2f424b9f965b762683d497b697ab240eb10dead17de77c7abd1cd38727e92762ccae4aff444977
SSDEEP

24576:Ca+L5JM0ZZN8uX7QHUEjrgVo+ETCmqba0W+Tuu4gmmRt1ZGj:X+hjrX7Q0Ej4on23nTuu4gXR5G

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

asyncgeneration1.duckdns.org:4404

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
false
install_folder
%AppData%

aes.plain

Signatures

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

Async RAT payload 8 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/912-75-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/912-76-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/912-78-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/912-80-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/912-82-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/524-83-0x0000000002270000-0x00000000022B0000-memory.dmp	asyncrat
behavioral1/memory/912-84-0x0000000002240000-0x0000000002280000-memory.dmp	asyncrat
behavioral1/memory/912-102-0x0000000002240000-0x0000000002280000-memory.dmp	asyncrat

Suspicious use of SetThreadContext 1 IoCs

Processes:

Copy.exe

description pid process target process

PID 1444 set thread context of 912 1444 Copy.exe Copy.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

Processes:

schtasks.exe

pid process

1992 schtasks.exe
Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

Copy.exepowershell.exepowershell.exe

pid process

1444 Copy.exe
1444 Copy.exe
1444 Copy.exe
1672 powershell.exe
524 powershell.exe

description	pid	process	target process
PID 1444 set thread context of 912	1444	Copy.exe	Copy.exe

pid	process
1992	schtasks.exe

pid	process
1444	Copy.exe
1444	Copy.exe
1444	Copy.exe
1672	powershell.exe
524	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

Copy.exepowershell.exepowershell.exeCopy.exe

description	pid	process
Token: SeDebugPrivilege	1444	Copy.exe
Token: SeDebugPrivilege	524	powershell.exe
Token: SeDebugPrivilege	1672	powershell.exe
Token: SeDebugPrivilege	912	Copy.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

Copy.exe

description	pid	process	target process
PID 1444 wrote to memory of 524	1444	Copy.exe	powershell.exe
PID 1444 wrote to memory of 524	1444	Copy.exe	powershell.exe
PID 1444 wrote to memory of 524	1444	Copy.exe	powershell.exe
PID 1444 wrote to memory of 524	1444	Copy.exe	powershell.exe
PID 1444 wrote to memory of 1672	1444	Copy.exe	powershell.exe
PID 1444 wrote to memory of 1672	1444	Copy.exe	powershell.exe
PID 1444 wrote to memory of 1672	1444	Copy.exe	powershell.exe
PID 1444 wrote to memory of 1672	1444	Copy.exe	powershell.exe
PID 1444 wrote to memory of 1992	1444	Copy.exe	schtasks.exe
PID 1444 wrote to memory of 1992	1444	Copy.exe	schtasks.exe
PID 1444 wrote to memory of 1992	1444	Copy.exe	schtasks.exe
PID 1444 wrote to memory of 1992	1444	Copy.exe	schtasks.exe
PID 1444 wrote to memory of 912	1444	Copy.exe	Copy.exe
PID 1444 wrote to memory of 912	1444	Copy.exe	Copy.exe
PID 1444 wrote to memory of 912	1444	Copy.exe	Copy.exe
PID 1444 wrote to memory of 912	1444	Copy.exe	Copy.exe
PID 1444 wrote to memory of 912	1444	Copy.exe	Copy.exe
PID 1444 wrote to memory of 912	1444	Copy.exe	Copy.exe
PID 1444 wrote to memory of 912	1444	Copy.exe	Copy.exe
PID 1444 wrote to memory of 912	1444	Copy.exe	Copy.exe
PID 1444 wrote to memory of 912	1444	Copy.exe	Copy.exe

C:\Users\Admin\AppData\Local\Temp\Copy.exe
"C:\Users\Admin\AppData\Local\Temp\Copy.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1444

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\Copy.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:524

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\yXBzlrEBvIU.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1672

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\yXBzlrEBvIU" /XML "C:\Users\Admin\AppData\Local\Temp\tmpCFAF.tmp"
2⤵
- Creates scheduled task(s)
PID:1992

C:\Users\Admin\AppData\Local\Temp\Copy.exe
"C:\Users\Admin\AppData\Local\Temp\Copy.exe"
2⤵
- Suspicious use of AdjustPrivilegeToken
PID:912

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmpCFAF.tmp
Filesize
1KB

MD5
7fce7d498c6456a237656ee1a41edad4

SHA1
1e65ccb00707a54fb363db0084d85491b8b3da91

SHA256
3d3916e4b6dc6745369a1596555bfdc113601f81f9c57b7e0917bd45c96c34d6

SHA512
161c22d60951181fec47d24bb1dbfb45d49e654494289cee6187b446fa49428d28017b629507b5e8d9cada43db392864e54e49da4d41e1807015213ff83e7b26

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\0Z4YLGSVIPC2OKGDHARE.temp
Filesize
7KB

MD5
5d251d7bfe3901ffcb47c268b395aee7

SHA1
fb522931226ce23865e7a10c7da2bf74723f1705

SHA256
6009399dfcb7580eafc6c0c8f9564328104b2d48d65ebe3dd5c174962ed17867

SHA512
e3c2eb89fefe6e79444ce14fa975b132f88d131af34ca27b70d465e54b2fa5fd20b0f24e24dc2e5a4d1ee725118a931465d49811e365b8f0192c475d24af1ab7

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms
Filesize
7KB

MD5
5d251d7bfe3901ffcb47c268b395aee7

SHA1
fb522931226ce23865e7a10c7da2bf74723f1705

SHA256
6009399dfcb7580eafc6c0c8f9564328104b2d48d65ebe3dd5c174962ed17867

SHA512
e3c2eb89fefe6e79444ce14fa975b132f88d131af34ca27b70d465e54b2fa5fd20b0f24e24dc2e5a4d1ee725118a931465d49811e365b8f0192c475d24af1ab7

Download Submit
memory/524-83-0x0000000002270000-0x00000000022B0000-memory.dmp

Filesize
256KB

Download
memory/912-78-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/912-82-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/912-102-0x0000000002240000-0x0000000002280000-memory.dmp

Filesize
256KB

Download
memory/912-84-0x0000000002240000-0x0000000002280000-memory.dmp

Filesize
256KB

Download
memory/912-80-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/912-77-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/912-73-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/912-74-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/912-75-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/912-76-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1444-72-0x0000000000470000-0x00000000004DC000-memory.dmp

Filesize
432KB

Download
memory/1444-54-0x0000000000C40000-0x0000000000D64000-memory.dmp

Filesize
1.1MB

Download
memory/1444-56-0x0000000000560000-0x000000000057C000-memory.dmp

Filesize
112KB

Download
memory/1444-59-0x0000000007C50000-0x0000000007D34000-memory.dmp

Filesize
912KB

Download
memory/1444-55-0x00000000072B0000-0x00000000072F0000-memory.dmp

Filesize
256KB

Download
memory/1444-57-0x00000000072B0000-0x00000000072F0000-memory.dmp

Filesize
256KB

Download
memory/1444-58-0x0000000000510000-0x000000000051C000-memory.dmp

Filesize
48KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads