asyncrat | 809112ac6e017b61aebf42258329beca47731c9863fba713d1c8e8f9427426a7

General

Target

HomeBrewX_SS.exe
Size

47KB
MD5

e97b4205f7629c6b7bef802c80262e0c
SHA1

7ced92ce3417bf5f48cf420c7084818c4bd95efb
SHA256

809112ac6e017b61aebf42258329beca47731c9863fba713d1c8e8f9427426a7
SHA512

e220a9ee2821287beaa145bcdce226c72d2cf94e4ff1f366879688b12bf13b31f74289834678efa8e7d2995fd0e38ea808e977d6e1416f3b1ebfddd0e87908f5
SSDEEP

768:KuACNTHkvSbWUnwKJmo2q7jnknTL4yPIRSfcwL/p0bgMjY5akItMfe4JxEENEzlS:KuACNTHge24CL4bRSEwL2bgEJkI8vEEx

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

resource	yara_rule
behavioral2/files/0x000700000002aade-11.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
3128	HomeBrewX_ServerSide.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	HomeBrewX_SS.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	HomeBrewX_ServerSide.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4300	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
1696	schtasks.exe

Suspicious behavior: EnumeratesProcesses 17 IoCs

pid	Process
2756	HomeBrewX_SS.exe
2756	HomeBrewX_SS.exe
2756	HomeBrewX_SS.exe
2756	HomeBrewX_SS.exe
2756	HomeBrewX_SS.exe
2756	HomeBrewX_SS.exe
2756	HomeBrewX_SS.exe
2756	HomeBrewX_SS.exe
2756	HomeBrewX_SS.exe
2756	HomeBrewX_SS.exe
2756	HomeBrewX_SS.exe
2756	HomeBrewX_SS.exe
2756	HomeBrewX_SS.exe
2756	HomeBrewX_SS.exe
2756	HomeBrewX_SS.exe
2756	HomeBrewX_SS.exe
2756	HomeBrewX_SS.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2756	HomeBrewX_SS.exe
Token: SeDebugPrivilege	3128	HomeBrewX_ServerSide.exe
Token: SeDebugPrivilege	3128	HomeBrewX_ServerSide.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2756 wrote to memory of 3872	2756	HomeBrewX_SS.exe	78
PID 2756 wrote to memory of 3872	2756	HomeBrewX_SS.exe	78
PID 2756 wrote to memory of 3872	2756	HomeBrewX_SS.exe	78
PID 2756 wrote to memory of 652	2756	HomeBrewX_SS.exe	80
PID 2756 wrote to memory of 652	2756	HomeBrewX_SS.exe	80
PID 2756 wrote to memory of 652	2756	HomeBrewX_SS.exe	80
PID 652 wrote to memory of 4300	652	cmd.exe	82
PID 652 wrote to memory of 4300	652	cmd.exe	82
PID 652 wrote to memory of 4300	652	cmd.exe	82
PID 3872 wrote to memory of 1696	3872	cmd.exe	83
PID 3872 wrote to memory of 1696	3872	cmd.exe	83
PID 3872 wrote to memory of 1696	3872	cmd.exe	83
PID 652 wrote to memory of 3128	652	cmd.exe	84
PID 652 wrote to memory of 3128	652	cmd.exe	84
PID 652 wrote to memory of 3128	652	cmd.exe	84

C:\Users\Admin\AppData\Local\Temp\HomeBrewX_SS.exe
"C:\Users\Admin\AppData\Local\Temp\HomeBrewX_SS.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2756
- 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:3872
- - 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:1696
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpAF0C.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:652
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4300
- - 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:3128

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\tmpAF0C.tmp.bat

Filesize
164B

MD5
12f01c3409fca1bb6bc639af7c5b7380

SHA1
676668eae4dede389c339d868349888e36208ae6

SHA256
5933d16669b001315785437535ab39fa1153f70123ee766bcbeb338260a082f9

SHA512
c85939790e8a3f297ae99cfdb30def06021d27acf7212459be27f525e1941b99f582332a61d66dede78f179ba54c556f116481864451215872fe96665303d6e7

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

Filesize
47KB

MD5
e97b4205f7629c6b7bef802c80262e0c

SHA1
7ced92ce3417bf5f48cf420c7084818c4bd95efb

SHA256
809112ac6e017b61aebf42258329beca47731c9863fba713d1c8e8f9427426a7

SHA512
e220a9ee2821287beaa145bcdce226c72d2cf94e4ff1f366879688b12bf13b31f74289834678efa8e7d2995fd0e38ea808e977d6e1416f3b1ebfddd0e87908f5

Download Submit
memory/2756-0-0x0000000074EFE000-0x0000000074EFF000-memory.dmp

Filesize
4KB

Download
memory/2756-1-0x0000000000290000-0x00000000002A2000-memory.dmp

Filesize
72KB

Download
memory/2756-2-0x0000000074EF0000-0x00000000756A1000-memory.dmp

Filesize
7.7MB

Download
memory/2756-3-0x0000000004D30000-0x0000000004DCC000-memory.dmp

Filesize
624KB

Download
memory/2756-8-0x0000000074EF0000-0x00000000756A1000-memory.dmp

Filesize
7.7MB

Download
memory/3128-13-0x0000000074EF0000-0x00000000756A1000-memory.dmp

Filesize
7.7MB

Download
memory/3128-14-0x0000000074EF0000-0x00000000756A1000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads