asyncrat | 4c5784bccf200de9ed3ebaa19feaf81e7d77d6acb152e4fa1e01dc86be97c092

General

Target

4c5784bccf200de9ed3ebaa19feaf81e7d77d6acb152e4fa1e01dc86be97c092.exe
Size

48KB
MD5

0e9ffa3cb3c6d2e33322882c53bfd9fc
SHA1

049810ff20e626c1b24bf670a5a03408d096111f
SHA256

4c5784bccf200de9ed3ebaa19feaf81e7d77d6acb152e4fa1e01dc86be97c092
SHA512

989a9cca2f09a294371eaff466859627f5e3c1d6a5962e2f6348df92df6306d6473ca31581c474b9ae35e140773fe1bba5aec0783fe0ae4f2dc8c3b8c184855b
SSDEEP

768:ques1TYQZ3VWU1ymhbvmo2qjP1MlBymuXPIRe7fM6VJ0bvXmKKHaQeSE0a5YBDZL:ques1TYiFhN2pym1g7ftubvWKH0Iede6

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

127.0.0.1:1337

18.119.130.176:6606

18.119.130.176:7707

18.119.130.176:8808

18.119.130.176:1337

Mutex

3WIOtiO6KOc9

Attributes

delay
3
install
true
install_file
RtlUpdate.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/0x000d000000012267-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2576	RtlUpdate.exe

Loads dropped DLL 1 IoCs

pid	Process
2112	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RtlUpdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4c5784bccf200de9ed3ebaa19feaf81e7d77d6acb152e4fa1e01dc86be97c092.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
1656	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
2580	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2056	4c5784bccf200de9ed3ebaa19feaf81e7d77d6acb152e4fa1e01dc86be97c092.exe
2056	4c5784bccf200de9ed3ebaa19feaf81e7d77d6acb152e4fa1e01dc86be97c092.exe
2056	4c5784bccf200de9ed3ebaa19feaf81e7d77d6acb152e4fa1e01dc86be97c092.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2056	4c5784bccf200de9ed3ebaa19feaf81e7d77d6acb152e4fa1e01dc86be97c092.exe
Token: SeDebugPrivilege	2576	RtlUpdate.exe
Token: SeDebugPrivilege	2576	RtlUpdate.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2056 wrote to memory of 2796	2056	4c5784bccf200de9ed3ebaa19feaf81e7d77d6acb152e4fa1e01dc86be97c092.exe	32
PID 2056 wrote to memory of 2796	2056	4c5784bccf200de9ed3ebaa19feaf81e7d77d6acb152e4fa1e01dc86be97c092.exe	32
PID 2056 wrote to memory of 2796	2056	4c5784bccf200de9ed3ebaa19feaf81e7d77d6acb152e4fa1e01dc86be97c092.exe	32
PID 2056 wrote to memory of 2796	2056	4c5784bccf200de9ed3ebaa19feaf81e7d77d6acb152e4fa1e01dc86be97c092.exe	32
PID 2056 wrote to memory of 2112	2056	4c5784bccf200de9ed3ebaa19feaf81e7d77d6acb152e4fa1e01dc86be97c092.exe	34
PID 2056 wrote to memory of 2112	2056	4c5784bccf200de9ed3ebaa19feaf81e7d77d6acb152e4fa1e01dc86be97c092.exe	34
PID 2056 wrote to memory of 2112	2056	4c5784bccf200de9ed3ebaa19feaf81e7d77d6acb152e4fa1e01dc86be97c092.exe	34
PID 2056 wrote to memory of 2112	2056	4c5784bccf200de9ed3ebaa19feaf81e7d77d6acb152e4fa1e01dc86be97c092.exe	34
PID 2796 wrote to memory of 2580	2796	cmd.exe	36
PID 2796 wrote to memory of 2580	2796	cmd.exe	36
PID 2796 wrote to memory of 2580	2796	cmd.exe	36
PID 2796 wrote to memory of 2580	2796	cmd.exe	36
PID 2112 wrote to memory of 1656	2112	cmd.exe	37
PID 2112 wrote to memory of 1656	2112	cmd.exe	37
PID 2112 wrote to memory of 1656	2112	cmd.exe	37
PID 2112 wrote to memory of 1656	2112	cmd.exe	37
PID 2112 wrote to memory of 2576	2112	cmd.exe	38
PID 2112 wrote to memory of 2576	2112	cmd.exe	38
PID 2112 wrote to memory of 2576	2112	cmd.exe	38
PID 2112 wrote to memory of 2576	2112	cmd.exe	38
PID 2112 wrote to memory of 2576	2112	cmd.exe	38
PID 2112 wrote to memory of 2576	2112	cmd.exe	38
PID 2112 wrote to memory of 2576	2112	cmd.exe	38

C:\Users\Admin\AppData\Local\Temp\4c5784bccf200de9ed3ebaa19feaf81e7d77d6acb152e4fa1e01dc86be97c092.exe
"C:\Users\Admin\AppData\Local\Temp\4c5784bccf200de9ed3ebaa19feaf81e7d77d6acb152e4fa1e01dc86be97c092.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2056
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "RtlUpdate" /tr '"C:\Users\Admin\AppData\Roaming\RtlUpdate.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2796
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "RtlUpdate" /tr '"C:\Users\Admin\AppData\Roaming\RtlUpdate.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2580
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpFB5F.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2112
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1656
- - C:\Users\Admin\AppData\Roaming\RtlUpdate.exe
    "C:\Users\Admin\AppData\Roaming\RtlUpdate.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2576

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\tmpFB5F.tmp.bat

Filesize
153B

MD5
bab0ef25ec9421c6e27a6a5f6d6cb5cb

SHA1
86a762f8426dc8fac57282596baeb97297c29a10

SHA256
5bbd9b7d8bf697663e71d037613e8363c488fdd2c9b83ba107d42de2fa59cae6

SHA512
814617cd04c9c8a34ad743b9a6f85d7ff120d66726fd390402e9b48d076a47bbd8bcd0d7a80bcae7160181ef6264b3412cae705be4ea9dc07a0997de388b6b82

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

Filesize
48KB

MD5
0e9ffa3cb3c6d2e33322882c53bfd9fc

SHA1
049810ff20e626c1b24bf670a5a03408d096111f

SHA256
4c5784bccf200de9ed3ebaa19feaf81e7d77d6acb152e4fa1e01dc86be97c092

SHA512
989a9cca2f09a294371eaff466859627f5e3c1d6a5962e2f6348df92df6306d6473ca31581c474b9ae35e140773fe1bba5aec0783fe0ae4f2dc8c3b8c184855b

Download Submit
memory/2056-0-0x00000000748EE000-0x00000000748EF000-memory.dmp

Filesize
4KB

Download
memory/2056-1-0x0000000000CB0000-0x0000000000CC2000-memory.dmp

Filesize
72KB

Download
memory/2056-2-0x00000000748E0000-0x0000000074FCE000-memory.dmp

Filesize
6.9MB

Download
memory/2056-11-0x00000000748E0000-0x0000000074FCE000-memory.dmp

Filesize
6.9MB

Download
memory/2576-16-0x0000000000940000-0x0000000000952000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads