asyncrat | bb6af8f4ac8ab6c14b159b578a5097ad5d7827751230595dd3b2a3c767f3d869

General

Target

0x0008000000018bf3-14.exe
Size

45KB
MD5

ece45103465f781d48cdc41a19e7d9cc
SHA1

d7025037bdf2bfb09b3797443ae00d8dbddd4eb7
SHA256

bb6af8f4ac8ab6c14b159b578a5097ad5d7827751230595dd3b2a3c767f3d869
SHA512

4e14419240dbd8ebba468afddf48a70df9d6a55ceaa149eb5873d99aac32eb0aaa5e536791db88d0bdd908eeab6b89d8901687be868ff3b9b0a0b841333f6b15
SSDEEP

768:vuivNTdFHLBWUZiGrmo2qrrKjGKG6PIyzjbFgX3io7OoZp28aFJuvnBDZjx:vuivNTdBR2mKYDy3bCXSUOcta7uJdjx

Score

10^/10

asyncrat march-25-5 discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

March-25-5

C2

chongmei33.publicvm.com:2703

chongmei33.publicvm.com:7031

umarmira055.duckdns.org:2703

umarmira055.duckdns.org:7031

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
svchost.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
behavioral2/files/0x0007000000024212-11.dat	family_asyncrat

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3446877943-4095308722-756223633-1000\Control Panel\International\Geo\Nation	0x0008000000018bf3-14.exe

Executes dropped EXE 1 IoCs

pid	Process
4636	svchost.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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	0x0008000000018bf3-14.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
4660	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
4716	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
2632	0x0008000000018bf3-14.exe
2632	0x0008000000018bf3-14.exe
2632	0x0008000000018bf3-14.exe
2632	0x0008000000018bf3-14.exe
2632	0x0008000000018bf3-14.exe
2632	0x0008000000018bf3-14.exe
2632	0x0008000000018bf3-14.exe
2632	0x0008000000018bf3-14.exe
2632	0x0008000000018bf3-14.exe
2632	0x0008000000018bf3-14.exe
2632	0x0008000000018bf3-14.exe
2632	0x0008000000018bf3-14.exe
2632	0x0008000000018bf3-14.exe
2632	0x0008000000018bf3-14.exe
2632	0x0008000000018bf3-14.exe
2632	0x0008000000018bf3-14.exe
2632	0x0008000000018bf3-14.exe
2632	0x0008000000018bf3-14.exe
2632	0x0008000000018bf3-14.exe
2632	0x0008000000018bf3-14.exe
2632	0x0008000000018bf3-14.exe
2632	0x0008000000018bf3-14.exe
2632	0x0008000000018bf3-14.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2632	0x0008000000018bf3-14.exe
Token: SeDebugPrivilege	4636	svchost.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2632 wrote to memory of 4848	2632	0x0008000000018bf3-14.exe	94
PID 2632 wrote to memory of 4848	2632	0x0008000000018bf3-14.exe	94
PID 2632 wrote to memory of 4848	2632	0x0008000000018bf3-14.exe	94
PID 2632 wrote to memory of 3812	2632	0x0008000000018bf3-14.exe	96
PID 2632 wrote to memory of 3812	2632	0x0008000000018bf3-14.exe	96
PID 2632 wrote to memory of 3812	2632	0x0008000000018bf3-14.exe	96
PID 4848 wrote to memory of 4716	4848	cmd.exe	98
PID 4848 wrote to memory of 4716	4848	cmd.exe	98
PID 4848 wrote to memory of 4716	4848	cmd.exe	98
PID 3812 wrote to memory of 4660	3812	cmd.exe	99
PID 3812 wrote to memory of 4660	3812	cmd.exe	99
PID 3812 wrote to memory of 4660	3812	cmd.exe	99
PID 3812 wrote to memory of 4636	3812	cmd.exe	100
PID 3812 wrote to memory of 4636	3812	cmd.exe	100
PID 3812 wrote to memory of 4636	3812	cmd.exe	100

C:\Users\Admin\AppData\Local\Temp\0x0008000000018bf3-14.exe
"C:\Users\Admin\AppData\Local\Temp\0x0008000000018bf3-14.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2632
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4848
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4716
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp5A55.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3812
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4660
- - C:\Users\Admin\AppData\Roaming\svchost.exe
    "C:\Users\Admin\AppData\Roaming\svchost.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:4636

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

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmp5A55.tmp.bat

Filesize
151B

MD5
b5486e9d84e3baef680dbdb6120953e8

SHA1
d75aaba08efcde5382a491f6fa79697ec53606b9

SHA256
6f7984b6bba9ad3a74c48c5a2f983c9cd75c83608ac405e571dd5f06ac764cd0

SHA512
5cc9cdefdfed743f4aa1ccc8db94ac7e914a533d09dc97b0978651c834f266ce155a140e3a2d6608a70d2d29074c275ad0254c5a0e508f646630d8f9ab8cb968

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

Filesize
45KB

MD5
ece45103465f781d48cdc41a19e7d9cc

SHA1
d7025037bdf2bfb09b3797443ae00d8dbddd4eb7

SHA256
bb6af8f4ac8ab6c14b159b578a5097ad5d7827751230595dd3b2a3c767f3d869

SHA512
4e14419240dbd8ebba468afddf48a70df9d6a55ceaa149eb5873d99aac32eb0aaa5e536791db88d0bdd908eeab6b89d8901687be868ff3b9b0a0b841333f6b15

Download Submit
memory/2632-0-0x000000007481E000-0x000000007481F000-memory.dmp

Filesize
4KB

Download
memory/2632-1-0x0000000000880000-0x0000000000892000-memory.dmp

Filesize
72KB

Download
memory/2632-2-0x0000000074810000-0x0000000074FC0000-memory.dmp

Filesize
7.7MB

Download
memory/2632-3-0x0000000005220000-0x00000000052BC000-memory.dmp

Filesize
624KB

Download
memory/2632-8-0x0000000074810000-0x0000000074FC0000-memory.dmp

Filesize
7.7MB

Download
memory/4636-13-0x0000000074810000-0x0000000074FC0000-memory.dmp

Filesize
7.7MB

Download
memory/4636-14-0x0000000074810000-0x0000000074FC0000-memory.dmp

Filesize
7.7MB

Download
memory/4636-17-0x00000000063B0000-0x0000000006954000-memory.dmp

Filesize
5.6MB

Download
memory/4636-18-0x0000000005E70000-0x0000000005ED6000-memory.dmp

Filesize
408KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads