asyncrat | cae246e1b4386518005749ac3958c4506d448f1f7efdd49d839dd10a5e01be2b

General

Target

update.exe
Size

375KB
MD5

3ea6458b6a66860e0b494f4d23d80991
SHA1

e32f4c1d1601997a6c3a5745de5be87b84ffb167
SHA256

005e7927bf7df1153921f511ac3fe6527f039db911cec0d9ad7201bfa65054bf
SHA512

44487f251fd8f9f0a0adfaf7da10da43a58d22b3332cf15a8d88a407c56838f331468eb249d995a28a57c0992361c810501c0062be53791d12000df267ab5cee
SSDEEP

6144:kqzLj+4PhWh/WBdhK2f7qDyFNQwprWEBX5r95yIpFyBNhg5OD6t+hjCMSsCmvEs3:R3j+4YEB/K2f777prWEBD5nu+5OD6sYq

Score

10^/10

asyncrat default discovery persistence rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

C2

service32.sytes.net:8848

Mutex

NFHaufhauiwfhawfw

Attributes

delay
1
install
false
install_file
vmdservice.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

reg.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Windows\CurrentVersion\Run\Service = "C:\\Users\\Admin\\AppData\\Roaming\\update.exe"	reg.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

update.exe

description pid process target process

PID 1672 set thread context of 3024 1672 update.exe aspnet_compiler.exe

description	pid	process	target process
PID 1672 set thread context of 3024	1672	update.exe	aspnet_compiler.exe

System Location Discovery: System Language Discovery 1 TTPs 4 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

Processes:

update.execmd.exereg.exeaspnet_compiler.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	update.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	aspnet_compiler.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

update.exe

description pid process

Token: SeDebugPrivilege 1672 update.exe

description	pid	process
Token: SeDebugPrivilege	1672	update.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

update.execmd.exe

description	pid	process	target process
PID 1672 wrote to memory of 2432	1672	update.exe	cmd.exe
PID 1672 wrote to memory of 2432	1672	update.exe	cmd.exe
PID 1672 wrote to memory of 2432	1672	update.exe	cmd.exe
PID 1672 wrote to memory of 2432	1672	update.exe	cmd.exe
PID 2432 wrote to memory of 1364	2432	cmd.exe	reg.exe
PID 2432 wrote to memory of 1364	2432	cmd.exe	reg.exe
PID 2432 wrote to memory of 1364	2432	cmd.exe	reg.exe
PID 2432 wrote to memory of 1364	2432	cmd.exe	reg.exe
PID 1672 wrote to memory of 3024	1672	update.exe	aspnet_compiler.exe
PID 1672 wrote to memory of 3024	1672	update.exe	aspnet_compiler.exe
PID 1672 wrote to memory of 3024	1672	update.exe	aspnet_compiler.exe
PID 1672 wrote to memory of 3024	1672	update.exe	aspnet_compiler.exe
PID 1672 wrote to memory of 3024	1672	update.exe	aspnet_compiler.exe
PID 1672 wrote to memory of 3024	1672	update.exe	aspnet_compiler.exe
PID 1672 wrote to memory of 3024	1672	update.exe	aspnet_compiler.exe
PID 1672 wrote to memory of 3024	1672	update.exe	aspnet_compiler.exe
PID 1672 wrote to memory of 3024	1672	update.exe	aspnet_compiler.exe

C:\Users\Admin\AppData\Local\Temp\update.exe
"C:\Users\Admin\AppData\Local\Temp\update.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1672

C:\Windows\SysWOW64\cmd.exe
"cmd.exe" /c copy update.exe %APPDATA% && reg add "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run" /v Service /D "%APPDATA%\update.exe" -f
2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2432

C:\Windows\SysWOW64\reg.exe
reg add "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run" /v Service /D "C:\Users\Admin\AppData\Roaming\update.exe" -f
3⤵
- Adds Run key to start application
- System Location Discovery: System Language Discovery
PID:1364

C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
#cmd
2⤵
- System Location Discovery: System Language Discovery
PID:3024

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1672-0-0x000000007412E000-0x000000007412F000-memory.dmp

Filesize
4KB

Download
memory/1672-1-0x00000000010A0000-0x0000000001106000-memory.dmp

Filesize
408KB

Download
memory/1672-2-0x0000000074120000-0x000000007480E000-memory.dmp

Filesize
6.9MB

Download
memory/1672-3-0x0000000074120000-0x000000007480E000-memory.dmp

Filesize
6.9MB

Download
memory/1672-6-0x000000007412E000-0x000000007412F000-memory.dmp

Filesize
4KB

Download
memory/1672-7-0x0000000074120000-0x000000007480E000-memory.dmp

Filesize
6.9MB

Download
memory/1672-24-0x0000000074120000-0x000000007480E000-memory.dmp

Filesize
6.9MB

Download
memory/3024-23-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/3024-20-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/3024-10-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/3024-8-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/3024-18-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/3024-16-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/3024-14-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/3024-12-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/3024-25-0x0000000074120000-0x000000007480E000-memory.dmp

Filesize
6.9MB

Download
memory/3024-26-0x0000000074120000-0x000000007480E000-memory.dmp

Filesize
6.9MB

Download
memory/3024-27-0x0000000074120000-0x000000007480E000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads