asyncrat | 120cdab22661efc232e872f45c5c42cee1f33f4b23996596bbffc1fe9cde1a03

General

Target

2760-2-0x0000000000220000-0x0000000000232000-memory.exe
Size

72KB
MD5

abae485c5bb08a3c3d973a9f0bf4909f
SHA1

7ab206b8de7e8e2757c25c0144164d337c454d43
SHA256

120cdab22661efc232e872f45c5c42cee1f33f4b23996596bbffc1fe9cde1a03
SHA512

890f360d52682b445f076c960ab6aa0babb5bd569bb8d54babecbb2ed266143c3746cccb7875f7589beabd8c0c64b66e4cfcf5629e43750a8b2547c40a33c42c
SSDEEP

1536:yu270TceH2+nszByYfUlbAoEb7uYHTF25bxzlxOU0d+c:yu2oTceH2+szByYfUlbAoEb7uYB2jh0d

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

54.253.7.109:4447

Mutex

XqcNee3124zJ

Attributes

delay
21
install
true
install_file
service.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

Processes:

resource	yara_rule
\Users\Admin\AppData\Roaming\service.exe	family_asyncrat

Executes dropped EXE 1 IoCs

Processes:

service.exe

pid process

2508 service.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

1256 cmd.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2508	service.exe

pid	process
1256	cmd.exe

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

Processes:

timeout.exeschtasks.exeservice.exe2760-2-0x0000000000220000-0x0000000000232000-memory.execmd.execmd.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	service.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2760-2-0x0000000000220000-0x0000000000232000-memory.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
evasion

Processes:

timeout.exe

pid process

1852 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

Processes:

schtasks.exe

pid process

1476 schtasks.exe

pid	process
1852	timeout.exe

pid	process
1476	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

2760-2-0x0000000000220000-0x0000000000232000-memory.exe

pid	process
2472	2760-2-0x0000000000220000-0x0000000000232000-memory.exe
2472	2760-2-0x0000000000220000-0x0000000000232000-memory.exe
2472	2760-2-0x0000000000220000-0x0000000000232000-memory.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

2760-2-0x0000000000220000-0x0000000000232000-memory.exeservice.exe

description	pid	process
Token: SeDebugPrivilege	2472	2760-2-0x0000000000220000-0x0000000000232000-memory.exe
Token: SeDebugPrivilege	2508	service.exe
Token: SeDebugPrivilege	2508	service.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

2760-2-0x0000000000220000-0x0000000000232000-memory.execmd.execmd.exe

description	pid	process	target process
PID 2472 wrote to memory of 2608	2472	2760-2-0x0000000000220000-0x0000000000232000-memory.exe	cmd.exe
PID 2472 wrote to memory of 2608	2472	2760-2-0x0000000000220000-0x0000000000232000-memory.exe	cmd.exe
PID 2472 wrote to memory of 2608	2472	2760-2-0x0000000000220000-0x0000000000232000-memory.exe	cmd.exe
PID 2472 wrote to memory of 2608	2472	2760-2-0x0000000000220000-0x0000000000232000-memory.exe	cmd.exe
PID 2472 wrote to memory of 1256	2472	2760-2-0x0000000000220000-0x0000000000232000-memory.exe	cmd.exe
PID 2472 wrote to memory of 1256	2472	2760-2-0x0000000000220000-0x0000000000232000-memory.exe	cmd.exe
PID 2472 wrote to memory of 1256	2472	2760-2-0x0000000000220000-0x0000000000232000-memory.exe	cmd.exe
PID 2472 wrote to memory of 1256	2472	2760-2-0x0000000000220000-0x0000000000232000-memory.exe	cmd.exe
PID 1256 wrote to memory of 1852	1256	cmd.exe	timeout.exe
PID 1256 wrote to memory of 1852	1256	cmd.exe	timeout.exe
PID 1256 wrote to memory of 1852	1256	cmd.exe	timeout.exe
PID 1256 wrote to memory of 1852	1256	cmd.exe	timeout.exe
PID 2608 wrote to memory of 1476	2608	cmd.exe	schtasks.exe
PID 2608 wrote to memory of 1476	2608	cmd.exe	schtasks.exe
PID 2608 wrote to memory of 1476	2608	cmd.exe	schtasks.exe
PID 2608 wrote to memory of 1476	2608	cmd.exe	schtasks.exe
PID 1256 wrote to memory of 2508	1256	cmd.exe	service.exe
PID 1256 wrote to memory of 2508	1256	cmd.exe	service.exe
PID 1256 wrote to memory of 2508	1256	cmd.exe	service.exe
PID 1256 wrote to memory of 2508	1256	cmd.exe	service.exe

C:\Users\Admin\AppData\Local\Temp\2760-2-0x0000000000220000-0x0000000000232000-memory.exe
"C:\Users\Admin\AppData\Local\Temp\2760-2-0x0000000000220000-0x0000000000232000-memory.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2472

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "service" /tr '"C:\Users\Admin\AppData\Roaming\service.exe"' & exit
2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2608

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "service" /tr '"C:\Users\Admin\AppData\Roaming\service.exe"'
3⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:1476

C:\Windows\SysWOW64\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpCC44.tmp.bat""
2⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1256

C:\Windows\SysWOW64\timeout.exe
timeout 3
3⤵
- System Location Discovery: System Language Discovery
- Delays execution with timeout.exe
PID:1852

C:\Users\Admin\AppData\Roaming\service.exe
"C:\Users\Admin\AppData\Roaming\service.exe"
3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2508

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\tmpCC44.tmp.bat

Filesize
151B

MD5
03afb32d606072faaedd487a62c19a1f

SHA1
2db3b340b8f4945b84855dbfc6feb03cf0ab8df2

SHA256
150ed948ad27b4aaf6e4d2a1f868512e6b2206f73e0f32c74a0b602af7d84fb4

SHA512
726cfd450e642b9949ae4483a5aeab413300b2df7c69acf2c153566eb56fa16025103de44917aa0a3fb01c6e2579cc0c6bd5cc42f87ad401b54ba162854bce12

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

Filesize
72KB

MD5
abae485c5bb08a3c3d973a9f0bf4909f

SHA1
7ab206b8de7e8e2757c25c0144164d337c454d43

SHA256
120cdab22661efc232e872f45c5c42cee1f33f4b23996596bbffc1fe9cde1a03

SHA512
890f360d52682b445f076c960ab6aa0babb5bd569bb8d54babecbb2ed266143c3746cccb7875f7589beabd8c0c64b66e4cfcf5629e43750a8b2547c40a33c42c

Download Submit
memory/2472-0-0x000000007432E000-0x000000007432F000-memory.dmp

Filesize
4KB

Download
memory/2472-1-0x0000000001140000-0x0000000001152000-memory.dmp

Filesize
72KB

Download
memory/2472-2-0x000000007432E000-0x000000007432F000-memory.dmp

Filesize
4KB

Download
memory/2472-3-0x0000000074320000-0x0000000074A0E000-memory.dmp

Filesize
6.9MB

Download
memory/2472-12-0x0000000074320000-0x0000000074A0E000-memory.dmp

Filesize
6.9MB

Download
memory/2508-17-0x0000000000990000-0x00000000009A2000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads