asyncrat | bb6af8f4ac8ab6c14b159b578a5097ad5d7827751230595dd3b2a3c767f3d869

General

Target

0x0008000000018bf3-14.exe
Size

45KB
MD5

ece45103465f781d48cdc41a19e7d9cc
SHA1

d7025037bdf2bfb09b3797443ae00d8dbddd4eb7
SHA256

bb6af8f4ac8ab6c14b159b578a5097ad5d7827751230595dd3b2a3c767f3d869
SHA512

4e14419240dbd8ebba468afddf48a70df9d6a55ceaa149eb5873d99aac32eb0aaa5e536791db88d0bdd908eeab6b89d8901687be868ff3b9b0a0b841333f6b15
SSDEEP

768:vuivNTdFHLBWUZiGrmo2qrrKjGKG6PIyzjbFgX3io7OoZp28aFJuvnBDZjx:vuivNTdBR2mKYDy3bCXSUOcta7uJdjx

Score

10^/10

asyncrat march-25-5 discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

March-25-5

C2

chongmei33.publicvm.com:2703

chongmei33.publicvm.com:7031

umarmira055.duckdns.org:2703

umarmira055.duckdns.org:7031

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
svchost.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/0x000a00000001225c-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2936	svchost.exe

Loads dropped DLL 1 IoCs

pid	Process
2904	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	0x0008000000018bf3-14.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	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3044	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
2096	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2268	0x0008000000018bf3-14.exe
2268	0x0008000000018bf3-14.exe
2268	0x0008000000018bf3-14.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2268	0x0008000000018bf3-14.exe
Token: SeDebugPrivilege	2936	svchost.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2268 wrote to memory of 3020	2268	0x0008000000018bf3-14.exe	30
PID 2268 wrote to memory of 3020	2268	0x0008000000018bf3-14.exe	30
PID 2268 wrote to memory of 3020	2268	0x0008000000018bf3-14.exe	30
PID 2268 wrote to memory of 3020	2268	0x0008000000018bf3-14.exe	30
PID 2268 wrote to memory of 2904	2268	0x0008000000018bf3-14.exe	32
PID 2268 wrote to memory of 2904	2268	0x0008000000018bf3-14.exe	32
PID 2268 wrote to memory of 2904	2268	0x0008000000018bf3-14.exe	32
PID 2268 wrote to memory of 2904	2268	0x0008000000018bf3-14.exe	32
PID 3020 wrote to memory of 2096	3020	cmd.exe	34
PID 3020 wrote to memory of 2096	3020	cmd.exe	34
PID 3020 wrote to memory of 2096	3020	cmd.exe	34
PID 3020 wrote to memory of 2096	3020	cmd.exe	34
PID 2904 wrote to memory of 3044	2904	cmd.exe	35
PID 2904 wrote to memory of 3044	2904	cmd.exe	35
PID 2904 wrote to memory of 3044	2904	cmd.exe	35
PID 2904 wrote to memory of 3044	2904	cmd.exe	35
PID 2904 wrote to memory of 2936	2904	cmd.exe	36
PID 2904 wrote to memory of 2936	2904	cmd.exe	36
PID 2904 wrote to memory of 2936	2904	cmd.exe	36
PID 2904 wrote to memory of 2936	2904	cmd.exe	36

C:\Users\Admin\AppData\Local\Temp\0x0008000000018bf3-14.exe
"C:\Users\Admin\AppData\Local\Temp\0x0008000000018bf3-14.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2268
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3020
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2096
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpA709.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2904
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3044
- - C:\Users\Admin\AppData\Roaming\svchost.exe
    "C:\Users\Admin\AppData\Roaming\svchost.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2936

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\tmpA709.tmp.bat

Filesize
151B

MD5
bea431f220429961f74a8e0b69129939

SHA1
5c9e83bb8cdbdb97d6ccd960d6b51f28386c468a

SHA256
5d4cca9ec69a1e3151c1ad8e0cab2dbcadc512875ac9c9783ac51a90a1236a8d

SHA512
ebfe11e08ea5713a6efb1e107acf4cd552f4e69dba405e6da86bc988b70d3fe125b197f065f73229796014c93c8e3a345f08cc617d597180fb9c64675aef3e72

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

Filesize
45KB

MD5
ece45103465f781d48cdc41a19e7d9cc

SHA1
d7025037bdf2bfb09b3797443ae00d8dbddd4eb7

SHA256
bb6af8f4ac8ab6c14b159b578a5097ad5d7827751230595dd3b2a3c767f3d869

SHA512
4e14419240dbd8ebba468afddf48a70df9d6a55ceaa149eb5873d99aac32eb0aaa5e536791db88d0bdd908eeab6b89d8901687be868ff3b9b0a0b841333f6b15

Download Submit
memory/2268-0-0x0000000074DEE000-0x0000000074DEF000-memory.dmp

Filesize
4KB

Download
memory/2268-1-0x00000000002C0000-0x00000000002D2000-memory.dmp

Filesize
72KB

Download
memory/2268-2-0x0000000074DE0000-0x00000000754CE000-memory.dmp

Filesize
6.9MB

Download
memory/2268-12-0x0000000074DE0000-0x00000000754CE000-memory.dmp

Filesize
6.9MB

Download
memory/2936-16-0x0000000000150000-0x0000000000162000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads