asyncrat | b0f42cd37d2b43303ff4c3650b08874091e5befee8c8df1146ca938940d7c924

General

Target

HomeBrewXSS.exe
Size

47KB
MD5

0d1a0f08224bb93658a44a322f8ba885
SHA1

918b7e6b2ac0f955f72a868cec8090535313a0d8
SHA256

b0f42cd37d2b43303ff4c3650b08874091e5befee8c8df1146ca938940d7c924
SHA512

7b99f32f2b83fa626448292628e1a166838113d3695bf41761d943409ba5374fcdf565eea4691819084e30a5864e54d36af096f4a7152545559d98c96a31687d
SSDEEP

768:CuACNTHkvSbWUnwKJmo2q7U+Nc2ILoPIsZmUkNO00bagzXayuwlYjmkmiEBDZkx:CuACNTHge2kILNsZmUkNO3bagDap6uyU

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
HomeBrewX_ServerSide.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

Processes:

resource	yara_rule
\Users\Admin\AppData\Roaming\HomeBrewX_ServerSide.exe	family_asyncrat

Executes dropped EXE 1 IoCs

Processes:

HomeBrewX_ServerSide.exe

pid process

2868 HomeBrewX_ServerSide.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

2596 cmd.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2868	HomeBrewX_ServerSide.exe

pid	process
2596	cmd.exe

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

Processes:

HomeBrewXSS.execmd.execmd.exeschtasks.exetimeout.exeHomeBrewX_ServerSide.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	HomeBrewXSS.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	HomeBrewX_ServerSide.exe

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

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

Processes:

schtasks.exe

pid process

2764 schtasks.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

HomeBrewXSS.exe

pid process

1852 HomeBrewXSS.exe
1852 HomeBrewXSS.exe
1852 HomeBrewXSS.exe

pid	process
2776	timeout.exe

pid	process
2764	schtasks.exe

pid	process
1852	HomeBrewXSS.exe
1852	HomeBrewXSS.exe
1852	HomeBrewXSS.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

HomeBrewXSS.exeHomeBrewX_ServerSide.exe

description	pid	process
Token: SeDebugPrivilege	1852	HomeBrewXSS.exe
Token: SeDebugPrivilege	2868	HomeBrewX_ServerSide.exe
Token: SeDebugPrivilege	2868	HomeBrewX_ServerSide.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

HomeBrewXSS.execmd.execmd.exe

description	pid	process	target process
PID 1852 wrote to memory of 2856	1852	HomeBrewXSS.exe	cmd.exe
PID 1852 wrote to memory of 2856	1852	HomeBrewXSS.exe	cmd.exe
PID 1852 wrote to memory of 2856	1852	HomeBrewXSS.exe	cmd.exe
PID 1852 wrote to memory of 2856	1852	HomeBrewXSS.exe	cmd.exe
PID 1852 wrote to memory of 2596	1852	HomeBrewXSS.exe	cmd.exe
PID 1852 wrote to memory of 2596	1852	HomeBrewXSS.exe	cmd.exe
PID 1852 wrote to memory of 2596	1852	HomeBrewXSS.exe	cmd.exe
PID 1852 wrote to memory of 2596	1852	HomeBrewXSS.exe	cmd.exe
PID 2596 wrote to memory of 2776	2596	cmd.exe	timeout.exe
PID 2596 wrote to memory of 2776	2596	cmd.exe	timeout.exe
PID 2596 wrote to memory of 2776	2596	cmd.exe	timeout.exe
PID 2596 wrote to memory of 2776	2596	cmd.exe	timeout.exe
PID 2856 wrote to memory of 2764	2856	cmd.exe	schtasks.exe
PID 2856 wrote to memory of 2764	2856	cmd.exe	schtasks.exe
PID 2856 wrote to memory of 2764	2856	cmd.exe	schtasks.exe
PID 2856 wrote to memory of 2764	2856	cmd.exe	schtasks.exe
PID 2596 wrote to memory of 2868	2596	cmd.exe	HomeBrewX_ServerSide.exe
PID 2596 wrote to memory of 2868	2596	cmd.exe	HomeBrewX_ServerSide.exe
PID 2596 wrote to memory of 2868	2596	cmd.exe	HomeBrewX_ServerSide.exe
PID 2596 wrote to memory of 2868	2596	cmd.exe	HomeBrewX_ServerSide.exe

C:\Users\Admin\AppData\Local\Temp\HomeBrewXSS.exe
"C:\Users\Admin\AppData\Local\Temp\HomeBrewXSS.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1852

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "HomeBrewX_ServerSide" /tr '"C:\Users\Admin\AppData\Roaming\HomeBrewX_ServerSide.exe"' & exit
2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2856

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "HomeBrewX_ServerSide" /tr '"C:\Users\Admin\AppData\Roaming\HomeBrewX_ServerSide.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\tmp65E4.tmp.bat""
2⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2596

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\HomeBrewX_ServerSide.exe
"C:\Users\Admin\AppData\Roaming\HomeBrewX_ServerSide.exe"
3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2868

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\tmp65E4.tmp.bat

Filesize
164B

MD5
d6d8d82c913bf290e10d8cece38f1087

SHA1
4d32b63e2a80bdbb71d7c075b9706518ab15f1cc

SHA256
ddbbcdff4cbaed1008022bf7a1d1a1d475792c5441021e991b443dafeed8b112

SHA512
3f5732893f6b130380714aed90c021976a32f09986ee422e3d23677e2aa7dfbd7f4157b953dfa30ba6898dff7359977f22a9d41d8cf134c1d251b2e376acd2b4

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

Filesize
47KB

MD5
0d1a0f08224bb93658a44a322f8ba885

SHA1
918b7e6b2ac0f955f72a868cec8090535313a0d8

SHA256
b0f42cd37d2b43303ff4c3650b08874091e5befee8c8df1146ca938940d7c924

SHA512
7b99f32f2b83fa626448292628e1a166838113d3695bf41761d943409ba5374fcdf565eea4691819084e30a5864e54d36af096f4a7152545559d98c96a31687d

Download Submit
memory/1852-0-0x0000000074C3E000-0x0000000074C3F000-memory.dmp

Filesize
4KB

Download
memory/1852-1-0x00000000002F0000-0x0000000000302000-memory.dmp

Filesize
72KB

Download
memory/1852-2-0x0000000074C30000-0x000000007531E000-memory.dmp

Filesize
6.9MB

Download
memory/1852-12-0x0000000074C30000-0x000000007531E000-memory.dmp

Filesize
6.9MB

Download
memory/2868-16-0x0000000000E30000-0x0000000000E42000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads