asyncrat | 040ef285cdbca1ab4b3ceaeac8f0ace87aca7d2147123a1359f27a3039b0b700

General

Target

040ef285cdbca1ab4b3ceaeac8f0ace87aca7d2147123a1359f27a3039b0b700.exe
Size

47KB
MD5

ee9bd2b3d64511b880fcbd8ad23c71fa
SHA1

8c2cc8c959621c4543c9aa111367adb77f1ec697
SHA256

040ef285cdbca1ab4b3ceaeac8f0ace87aca7d2147123a1359f27a3039b0b700
SHA512

47c90a3a2093796a8b324fd76f92bc6f5a3975272f88305352d3e9c4fcd543f2c2421d7ed0d95e9df0cda33e6fb58b2a10c3a400bdeb6c1cb4912d50970623ec
SSDEEP

768:EuwvNT8E2mLWU3FvZmo2q7JGiMQsCmPIaggsbw0bRKoyqIShOVqTZxSbKBDZ8x:EuwvNT8xk27fQsCPaggCbRKoNLOVqTZQ

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

3.27.199.84:9182

Mutex

gRLpFG01LHh3

Attributes

delay
3
install
true
install_file
RuntimeBrokerSvc.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/0x0004000000004ed7-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2680	RuntimeBrokerSvc.exe

Loads dropped DLL 1 IoCs

pid	Process
2228	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	RuntimeBrokerSvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	040ef285cdbca1ab4b3ceaeac8f0ace87aca7d2147123a1359f27a3039b0b700.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

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
2780	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
2764	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2284	040ef285cdbca1ab4b3ceaeac8f0ace87aca7d2147123a1359f27a3039b0b700.exe
2284	040ef285cdbca1ab4b3ceaeac8f0ace87aca7d2147123a1359f27a3039b0b700.exe
2284	040ef285cdbca1ab4b3ceaeac8f0ace87aca7d2147123a1359f27a3039b0b700.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2284	040ef285cdbca1ab4b3ceaeac8f0ace87aca7d2147123a1359f27a3039b0b700.exe
Token: SeDebugPrivilege	2680	RuntimeBrokerSvc.exe
Token: SeDebugPrivilege	2680	RuntimeBrokerSvc.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2284 wrote to memory of 2788	2284	040ef285cdbca1ab4b3ceaeac8f0ace87aca7d2147123a1359f27a3039b0b700.exe	32
PID 2284 wrote to memory of 2788	2284	040ef285cdbca1ab4b3ceaeac8f0ace87aca7d2147123a1359f27a3039b0b700.exe	32
PID 2284 wrote to memory of 2788	2284	040ef285cdbca1ab4b3ceaeac8f0ace87aca7d2147123a1359f27a3039b0b700.exe	32
PID 2284 wrote to memory of 2788	2284	040ef285cdbca1ab4b3ceaeac8f0ace87aca7d2147123a1359f27a3039b0b700.exe	32
PID 2284 wrote to memory of 2228	2284	040ef285cdbca1ab4b3ceaeac8f0ace87aca7d2147123a1359f27a3039b0b700.exe	34
PID 2284 wrote to memory of 2228	2284	040ef285cdbca1ab4b3ceaeac8f0ace87aca7d2147123a1359f27a3039b0b700.exe	34
PID 2284 wrote to memory of 2228	2284	040ef285cdbca1ab4b3ceaeac8f0ace87aca7d2147123a1359f27a3039b0b700.exe	34
PID 2284 wrote to memory of 2228	2284	040ef285cdbca1ab4b3ceaeac8f0ace87aca7d2147123a1359f27a3039b0b700.exe	34
PID 2788 wrote to memory of 2764	2788	cmd.exe	36
PID 2788 wrote to memory of 2764	2788	cmd.exe	36
PID 2788 wrote to memory of 2764	2788	cmd.exe	36
PID 2788 wrote to memory of 2764	2788	cmd.exe	36
PID 2228 wrote to memory of 2780	2228	cmd.exe	37
PID 2228 wrote to memory of 2780	2228	cmd.exe	37
PID 2228 wrote to memory of 2780	2228	cmd.exe	37
PID 2228 wrote to memory of 2780	2228	cmd.exe	37
PID 2228 wrote to memory of 2680	2228	cmd.exe	38
PID 2228 wrote to memory of 2680	2228	cmd.exe	38
PID 2228 wrote to memory of 2680	2228	cmd.exe	38
PID 2228 wrote to memory of 2680	2228	cmd.exe	38

C:\Users\Admin\AppData\Local\Temp\040ef285cdbca1ab4b3ceaeac8f0ace87aca7d2147123a1359f27a3039b0b700.exe
"C:\Users\Admin\AppData\Local\Temp\040ef285cdbca1ab4b3ceaeac8f0ace87aca7d2147123a1359f27a3039b0b700.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2284
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "RuntimeBrokerSvc" /tr '"C:\Users\Admin\AppData\Roaming\RuntimeBrokerSvc.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2788
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "RuntimeBrokerSvc" /tr '"C:\Users\Admin\AppData\Roaming\RuntimeBrokerSvc.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2764
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpF3E0.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2228
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2780
- - C:\Users\Admin\AppData\Roaming\RuntimeBrokerSvc.exe
    "C:\Users\Admin\AppData\Roaming\RuntimeBrokerSvc.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2680

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\tmpF3E0.tmp.bat

Filesize
160B

MD5
3ff719200c6c862d0163c0b9e3e790b5

SHA1
555c94a3fa5a178b7f09fbeb57f560264d99f707

SHA256
adf73e3286222943d731d8f203179299ada55fa5030d6058e1f6b0f5e52e0e80

SHA512
92f7538283ee64e5b43ec18562dafdb23db0ccf3b4d286b3078c1e6579875033cd21d39c4c43beba25251450959028486594b1b68442a8c9a198344fdad45426

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

Filesize
47KB

MD5
ee9bd2b3d64511b880fcbd8ad23c71fa

SHA1
8c2cc8c959621c4543c9aa111367adb77f1ec697

SHA256
040ef285cdbca1ab4b3ceaeac8f0ace87aca7d2147123a1359f27a3039b0b700

SHA512
47c90a3a2093796a8b324fd76f92bc6f5a3975272f88305352d3e9c4fcd543f2c2421d7ed0d95e9df0cda33e6fb58b2a10c3a400bdeb6c1cb4912d50970623ec

Download Submit
memory/2284-0-0x000000007443E000-0x000000007443F000-memory.dmp

Filesize
4KB

Download
memory/2284-1-0x0000000000150000-0x0000000000162000-memory.dmp

Filesize
72KB

Download
memory/2284-2-0x0000000074430000-0x0000000074B1E000-memory.dmp

Filesize
6.9MB

Download
memory/2284-11-0x0000000074430000-0x0000000074B1E000-memory.dmp

Filesize
6.9MB

Download
memory/2680-16-0x00000000003C0000-0x00000000003D2000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads