asyncrat | 2bca6c0efecf8aaf7d57c357029d1cdf18f53ace681c77f27843131e03a907de

General

Target

windows.exe
Size

48KB
MD5

caf984985b1edff4578c541d5847ff68
SHA1

237b534ce0b1c4a11b7336ea7ef1c414d53a516d
SHA256

2bca6c0efecf8aaf7d57c357029d1cdf18f53ace681c77f27843131e03a907de
SHA512

6c49328cc9255a75dfa22196dcb1f8e023f83d57bc3761ad59e7086345c6c01b0079127b57cded9da435a77904de9a7d3dadd5586c22c3b869c531203e4e5a0f
SSDEEP

768:Uu1a21T3EiJfWUzuydmo2qzxP+xNm5Ph38PIWLl50bvpB2Gs6yXA15gWkPMUBDZ5:Uu1a21T3xN2EPGuPhxkl+bvpB+3A7gWU

Score

10^/10

asyncrat system program discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

System Program

C2

tuna91.duckdns.org:1604

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
system.exe
install_folder
%AppData%

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x0007000000012118-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2748	system.exe

Loads dropped DLL 1 IoCs

pid	Process
2612	cmd.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	system.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	windows.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
336	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2668	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2872	windows.exe
2872	windows.exe
2872	windows.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2872	windows.exe
Token: SeDebugPrivilege	2748	system.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2872 wrote to memory of 2712	2872	windows.exe	30
PID 2872 wrote to memory of 2712	2872	windows.exe	30
PID 2872 wrote to memory of 2712	2872	windows.exe	30
PID 2872 wrote to memory of 2712	2872	windows.exe	30
PID 2872 wrote to memory of 2612	2872	windows.exe	32
PID 2872 wrote to memory of 2612	2872	windows.exe	32
PID 2872 wrote to memory of 2612	2872	windows.exe	32
PID 2872 wrote to memory of 2612	2872	windows.exe	32
PID 2712 wrote to memory of 2668	2712	cmd.exe	34
PID 2712 wrote to memory of 2668	2712	cmd.exe	34
PID 2712 wrote to memory of 2668	2712	cmd.exe	34
PID 2712 wrote to memory of 2668	2712	cmd.exe	34
PID 2612 wrote to memory of 336	2612	cmd.exe	35
PID 2612 wrote to memory of 336	2612	cmd.exe	35
PID 2612 wrote to memory of 336	2612	cmd.exe	35
PID 2612 wrote to memory of 336	2612	cmd.exe	35
PID 2612 wrote to memory of 2748	2612	cmd.exe	36
PID 2612 wrote to memory of 2748	2612	cmd.exe	36
PID 2612 wrote to memory of 2748	2612	cmd.exe	36
PID 2612 wrote to memory of 2748	2612	cmd.exe	36

C:\Users\Admin\AppData\Local\Temp\windows.exe
"C:\Users\Admin\AppData\Local\Temp\windows.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2872
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "system" /tr '"C:\Users\Admin\AppData\Roaming\system.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2712
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "system" /tr '"C:\Users\Admin\AppData\Roaming\system.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2668
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp732.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2612
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:336
- - C:\Users\Admin\AppData\Roaming\system.exe
    "C:\Users\Admin\AppData\Roaming\system.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2748

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp732.tmp.bat

Filesize
149B

MD5
4e34a4009c6fc940c0d19dc22caa3315

SHA1
78089a4416fdc330f7e5fd9da8f72209811a7c57

SHA256
26b3da500c09b9f3451e747423f51fdc934f5d0f643ac95e30a5c4c7e0341957

SHA512
c5deeebeda1256740e6e39a61c761b81018ea44ff218191cf8cf19fd3bc86609b00f9815f49f139e11a45e1e26d98c718c860d89576ba4758be045eb9d205233

Download Submit
\Users\Admin\AppData\Roaming\system.exe

Filesize
48KB

MD5
caf984985b1edff4578c541d5847ff68

SHA1
237b534ce0b1c4a11b7336ea7ef1c414d53a516d

SHA256
2bca6c0efecf8aaf7d57c357029d1cdf18f53ace681c77f27843131e03a907de

SHA512
6c49328cc9255a75dfa22196dcb1f8e023f83d57bc3761ad59e7086345c6c01b0079127b57cded9da435a77904de9a7d3dadd5586c22c3b869c531203e4e5a0f

Download Submit
memory/2748-16-0x0000000000FF0000-0x0000000001002000-memory.dmp

Filesize
72KB

Download
memory/2872-0-0x0000000073F1E000-0x0000000073F1F000-memory.dmp

Filesize
4KB

Download
memory/2872-1-0x0000000000D10000-0x0000000000D22000-memory.dmp

Filesize
72KB

Download
memory/2872-2-0x0000000073F10000-0x00000000745FE000-memory.dmp

Filesize
6.9MB

Download
memory/2872-12-0x0000000073F10000-0x00000000745FE000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads