asyncrat | 2039dfbccacc781852e958fd710d12dbd26586c379e97b192c82b0343ee25ae0

General

Target

RuntimeBroker.exe
Size

48KB
MD5

f48dad5d1f222ffbad834e1735942077
SHA1

450940def40ae8cf9b48e7fed829f43802f9a984
SHA256

2039dfbccacc781852e958fd710d12dbd26586c379e97b192c82b0343ee25ae0
SHA512

a8bd8fd998c71cd5291243808f2bafe2fbf65f4d62646fbdf775f66b650f628e8f675fb6b5a7ea2b287efcc457a90e8c1403717e9f5b30bce9136bf78b83e06d
SSDEEP

768:Ru+01TQQEX1WUVt1Pmo2qjRx7u4vfW+0yD0b6nIkrTN4+djyP6a8T317oSkcDZ22:Ru+01TQfb2kv++0db6nXa8ySaYBbd2P+

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

impact-leeds.gl.at.ply.gg:44574

Mutex

rSqd9NDbOdBy

Attributes

delay
3
install
true
install_file
RuntimeBroker.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
3056	RuntimeBroker.exe

Loads dropped DLL 1 IoCs

pid	Process
2740	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	RuntimeBroker.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RuntimeBroker.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2592	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
2576	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2176	RuntimeBroker.exe
2176	RuntimeBroker.exe
2176	RuntimeBroker.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2176	RuntimeBroker.exe
Token: SeDebugPrivilege	3056	RuntimeBroker.exe
Token: SeDebugPrivilege	3056	RuntimeBroker.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2176 wrote to memory of 2828	2176	RuntimeBroker.exe	31
PID 2176 wrote to memory of 2828	2176	RuntimeBroker.exe	31
PID 2176 wrote to memory of 2828	2176	RuntimeBroker.exe	31
PID 2176 wrote to memory of 2828	2176	RuntimeBroker.exe	31
PID 2176 wrote to memory of 2740	2176	RuntimeBroker.exe	33
PID 2176 wrote to memory of 2740	2176	RuntimeBroker.exe	33
PID 2176 wrote to memory of 2740	2176	RuntimeBroker.exe	33
PID 2176 wrote to memory of 2740	2176	RuntimeBroker.exe	33
PID 2828 wrote to memory of 2576	2828	cmd.exe	35
PID 2828 wrote to memory of 2576	2828	cmd.exe	35
PID 2828 wrote to memory of 2576	2828	cmd.exe	35
PID 2828 wrote to memory of 2576	2828	cmd.exe	35
PID 2740 wrote to memory of 2592	2740	cmd.exe	36
PID 2740 wrote to memory of 2592	2740	cmd.exe	36
PID 2740 wrote to memory of 2592	2740	cmd.exe	36
PID 2740 wrote to memory of 2592	2740	cmd.exe	36
PID 2740 wrote to memory of 3056	2740	cmd.exe	37
PID 2740 wrote to memory of 3056	2740	cmd.exe	37
PID 2740 wrote to memory of 3056	2740	cmd.exe	37
PID 2740 wrote to memory of 3056	2740	cmd.exe	37

C:\Users\Admin\AppData\Local\Temp\RuntimeBroker.exe
"C:\Users\Admin\AppData\Local\Temp\RuntimeBroker.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2176
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "RuntimeBroker" /tr '"C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2828
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "RuntimeBroker" /tr '"C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2576
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp51F7.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2740
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2592
- - C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
    "C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:3056

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\tmp51F7.tmp.bat

Filesize
157B

MD5
a76219a98eb5013971429aa14d10f259

SHA1
1aca0d3bbe530a9e233e0a8a88a27c367bb4aa3a

SHA256
c7b0c83a99a8fdf7769bcd4770d192429a5df31579374c2e0ccf8c65c83f9fcb

SHA512
bd680f2a079f298fea1f5b7b5a81feaebe1a3646a59e654c5809c5b9c96da61b4f9731b4ae8c940c48dbd2d27c09d9287acfd1f5952efce307307f1e41a80c1c

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

Filesize
48KB

MD5
f48dad5d1f222ffbad834e1735942077

SHA1
450940def40ae8cf9b48e7fed829f43802f9a984

SHA256
2039dfbccacc781852e958fd710d12dbd26586c379e97b192c82b0343ee25ae0

SHA512
a8bd8fd998c71cd5291243808f2bafe2fbf65f4d62646fbdf775f66b650f628e8f675fb6b5a7ea2b287efcc457a90e8c1403717e9f5b30bce9136bf78b83e06d

Download Submit
memory/2176-0-0x00000000747CE000-0x00000000747CF000-memory.dmp

Filesize
4KB

Download
memory/2176-1-0x0000000000FA0000-0x0000000000FB2000-memory.dmp

Filesize
72KB

Download
memory/2176-2-0x00000000747C0000-0x0000000074EAE000-memory.dmp

Filesize
6.9MB

Download
memory/2176-11-0x00000000747C0000-0x0000000074EAE000-memory.dmp

Filesize
6.9MB

Download
memory/3056-16-0x0000000000920000-0x0000000000932000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads