asyncrat | d1f44ff6dc3ccb05ed82fb0ff2829efd4a5f01c87b7b8153116647878e664aad

General

Target

2216-43-0x0000000005150000-0x0000000005162000-memory.exe
Size

72KB
MD5

0f27885446ee41b884be8590e073a57a
SHA1

0151684fec6e3315bf644394e58ba862a5fcbe11
SHA256

d1f44ff6dc3ccb05ed82fb0ff2829efd4a5f01c87b7b8153116647878e664aad
SHA512

181897b7ba3b9c62062011f441c0d0c9f60d646c8a67b5dd99309d9022cc7f8b1f94aa285bb66b92ebdc448a269b05021ffb9403a34f7f9be53d0bc6decfa36b
SSDEEP

768:/ukzVT0kLd3WULgPdVmo2qDJCXOmt/PIizjb5gX3iz0LJsayEoZgtWkBDZix:/ukzVT0Mq12kX/i3bWXSzWs3gjdix

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

192.228.105.2:7707

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
svchst.exe
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 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x00070000000120fe-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2296	svchst.exe

Loads dropped DLL 1 IoCs

pid	Process
2676	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	2216-43-0x0000000005150000-0x0000000005162000-memory.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
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	svchst.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2776	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
2804	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
820	2216-43-0x0000000005150000-0x0000000005162000-memory.exe
820	2216-43-0x0000000005150000-0x0000000005162000-memory.exe
820	2216-43-0x0000000005150000-0x0000000005162000-memory.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	820	2216-43-0x0000000005150000-0x0000000005162000-memory.exe
Token: SeDebugPrivilege	2296	svchst.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 820 wrote to memory of 2464	820	2216-43-0x0000000005150000-0x0000000005162000-memory.exe	30
PID 820 wrote to memory of 2464	820	2216-43-0x0000000005150000-0x0000000005162000-memory.exe	30
PID 820 wrote to memory of 2464	820	2216-43-0x0000000005150000-0x0000000005162000-memory.exe	30
PID 820 wrote to memory of 2464	820	2216-43-0x0000000005150000-0x0000000005162000-memory.exe	30
PID 820 wrote to memory of 2676	820	2216-43-0x0000000005150000-0x0000000005162000-memory.exe	32
PID 820 wrote to memory of 2676	820	2216-43-0x0000000005150000-0x0000000005162000-memory.exe	32
PID 820 wrote to memory of 2676	820	2216-43-0x0000000005150000-0x0000000005162000-memory.exe	32
PID 820 wrote to memory of 2676	820	2216-43-0x0000000005150000-0x0000000005162000-memory.exe	32
PID 2464 wrote to memory of 2804	2464	cmd.exe	34
PID 2464 wrote to memory of 2804	2464	cmd.exe	34
PID 2464 wrote to memory of 2804	2464	cmd.exe	34
PID 2464 wrote to memory of 2804	2464	cmd.exe	34
PID 2676 wrote to memory of 2776	2676	cmd.exe	35
PID 2676 wrote to memory of 2776	2676	cmd.exe	35
PID 2676 wrote to memory of 2776	2676	cmd.exe	35
PID 2676 wrote to memory of 2776	2676	cmd.exe	35
PID 2676 wrote to memory of 2296	2676	cmd.exe	36
PID 2676 wrote to memory of 2296	2676	cmd.exe	36
PID 2676 wrote to memory of 2296	2676	cmd.exe	36
PID 2676 wrote to memory of 2296	2676	cmd.exe	36

C:\Users\Admin\AppData\Local\Temp\2216-43-0x0000000005150000-0x0000000005162000-memory.exe
"C:\Users\Admin\AppData\Local\Temp\2216-43-0x0000000005150000-0x0000000005162000-memory.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:820
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svchst" /tr '"C:\Users\Admin\AppData\Roaming\svchst.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2464
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "svchst" /tr '"C:\Users\Admin\AppData\Roaming\svchst.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2804
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpED3C.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2676
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2776
- - C:\Users\Admin\AppData\Roaming\svchst.exe
    "C:\Users\Admin\AppData\Roaming\svchst.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2296

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\Cab9C3.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpED3C.tmp.bat

Filesize
150B

MD5
c42813935ee0fc042077e8d2fd2c9970

SHA1
0374052ab0101740b44b0e7bc749e6b717f0d868

SHA256
8674fe7894b58d1620de3847da1afb9728f06ef9aafee4cf1b2de42eae0980a1

SHA512
7adeb509d14184150cca161a09d6ea923eed8b8c01987c2647ff1f4ea2a366d33d76780da93f387b336728f6ccf669d5e8f06d5ec0d7fdc78b463c6d40da97dc

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

Filesize
72KB

MD5
0f27885446ee41b884be8590e073a57a

SHA1
0151684fec6e3315bf644394e58ba862a5fcbe11

SHA256
d1f44ff6dc3ccb05ed82fb0ff2829efd4a5f01c87b7b8153116647878e664aad

SHA512
181897b7ba3b9c62062011f441c0d0c9f60d646c8a67b5dd99309d9022cc7f8b1f94aa285bb66b92ebdc448a269b05021ffb9403a34f7f9be53d0bc6decfa36b

Download Submit
memory/820-0-0x0000000074B0E000-0x0000000074B0F000-memory.dmp

Filesize
4KB

Download
memory/820-1-0x0000000000F30000-0x0000000000F42000-memory.dmp

Filesize
72KB

Download
memory/820-2-0x0000000074B00000-0x00000000751EE000-memory.dmp

Filesize
6.9MB

Download
memory/820-12-0x0000000074B00000-0x00000000751EE000-memory.dmp

Filesize
6.9MB

Download
memory/2296-16-0x0000000000280000-0x0000000000292000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads