asyncrat | 8629fdf61e8f319d33b855763008df3add2cb8e5c846cb6a0e3b95d29f652b95

General

Target
AsyncRAT.exe
Size 56KB
Sample260916-pv6ljsbm7x
SHA256 8629fdf61e8f319d33b855763008df3add2cb8e5c846cb6a0e3b95d29f652b95
MD5 440c151b3e65ef15d14102685ae8c4db
SHA1 b262ebec75373edfefd2bb6d748fa9981985f84c
SHA512 fa7de97b93630d26f781c3d392aa355435e99ad2e9103937979d66a3e4b12d495be6ef40796356334aee43bd37f11ed40c4654e229767b2e55619a2ed40732d9
SSDEEP 1536:2uf09TH2w240YikbeXSfSXQqQhRYndNkejNUHLTq:2ufoTH2w2pYikbeYSX8RYnDkINmq
TLSH
T11B435C003BE98236F27E5BB8ACF22104467AF2676603D55D2CC451DB5B23BC6D9426FA
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

luck8.webcam:443
luck8.webcam:8848
luck8.webcam:8080

Mutex

kBVPjakHQ19X

Attributes

delay
3
install
true
install_file
AsyncRat.exe
install_folder
%AppData%

aes.plain

Signatures

Family: 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
behavioral1/files/0x001400000002444d-8.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-1-5-21-524788801-3318743092-4051225893-1000\Control Panel\International\Geo\Nation	AsyncRAT.exe

Executes dropped EXE 2 IoCs

pid	Process
4156	AsyncRat.exe
2640	AsyncRat.exe

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

System Information Discovery
T1082

Executes a command shell one-liner 1 TTPs 2 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
5064	cmd.exe
2484	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 7 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	AsyncRat.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AsyncRat.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AsyncRAT.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

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3880	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
4340	schtasks.exe

Suspicious behavior: EnumeratesProcesses 19 IoCs

pid	Process
1256	AsyncRAT.exe
1256	AsyncRAT.exe
1256	AsyncRAT.exe
1256	AsyncRAT.exe
1256	AsyncRAT.exe
1256	AsyncRAT.exe
1256	AsyncRAT.exe
1256	AsyncRAT.exe
1256	AsyncRAT.exe
1256	AsyncRAT.exe
1256	AsyncRAT.exe
1256	AsyncRAT.exe
1256	AsyncRAT.exe
1256	AsyncRAT.exe
1256	AsyncRAT.exe
1256	AsyncRAT.exe
1256	AsyncRAT.exe
1256	AsyncRAT.exe
1256	AsyncRAT.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1256	AsyncRAT.exe
Token: SeDebugPrivilege	4156	AsyncRat.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1256 wrote to memory of 5064	1256	AsyncRAT.exe	84
PID 1256 wrote to memory of 2484	1256	AsyncRAT.exe	86
PID 2484 wrote to memory of 3880	2484	cmd.exe	88
PID 5064 wrote to memory of 4340	5064	cmd.exe	89
PID 2484 wrote to memory of 2640	2484	cmd.exe	92

C:\Users\Admin\AppData\Local\Temp\AsyncRAT.exe
"C:\Users\Admin\AppData\Local\Temp\AsyncRAT.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1256
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "AsyncRat" /tr '"C:\Users\Admin\AppData\Roaming\AsyncRat.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5064
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "AsyncRat" /tr '"C:\Users\Admin\AppData\Roaming\AsyncRat.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4340
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpEB74.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2484
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3880
- - C:\Users\Admin\AppData\Roaming\AsyncRat.exe
    "C:\Users\Admin\AppData\Roaming\AsyncRat.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2640

C:\Users\Admin\AppData\Roaming\AsyncRat.exe
"C:\Users\Admin\AppData\Roaming\AsyncRat.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:4156

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

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

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Downloads

AsyncRat.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\AsyncRat.exe.log
Size 522B
SHA256 2412679218bb0a7d05ceee32869bbb223619bde9966c4c460a68304a3367724b
MD5 acc9090417037dfa2a55b46ed86e32b8
SHA1 53fa6fb25fb3e88c24d2027aca6ae492b2800a4d
SHA512 d51f7085ec147c708f446b9fb6923cd2fb64596d354ed929e125b30ace57c8cb3217589447a36960e5d3aea87a4e48aaa82c7509eced6d6c2cecd71fcfe3697b
TLSH
T11EF097303722E1E489423F521C1C3A9943EF079AA360EE2C3958036ED825227AB212E3
MD5 SHA1 SHA512 TLSH

Submit Download

tmpEB74.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpEB74.tmp.bat
Size 152B
SHA256 a996e0af566f744bcd0c775d3cfb4a93006c44b5b6d27fa26b7d778acfd3fbb5
MD5 8d2f444f07e97aa649058a1047940154
SHA1 e9336fa75b93fbfae8845a24b80d594148527872
SHA512 945c37d6ba4b91962c04c56fcb7f0cee2ec2fedeeaaefe2280e2543a26923fa2715380a08a167eaec3aa4105d106613073eb2ecdd01c2c186d445da9de322304
TLSH
T16CC08C4692C6AA5E2C45341313BA988D91667C593F84AB90C30845AE1280548E0EA341
MD5 SHA1 SHA512 TLSH

Submit Download

AsyncRat.exe

Path C:\Users\Admin\AppData\Roaming\AsyncRat.exe
Size 56KB
SHA256 8629fdf61e8f319d33b855763008df3add2cb8e5c846cb6a0e3b95d29f652b95
MD5 440c151b3e65ef15d14102685ae8c4db
SHA1 b262ebec75373edfefd2bb6d748fa9981985f84c
SHA512 fa7de97b93630d26f781c3d392aa355435e99ad2e9103937979d66a3e4b12d495be6ef40796356334aee43bd37f11ed40c4654e229767b2e55619a2ed40732d9
SSDEEP 1536:2uf09TH2w240YikbeXSfSXQqQhRYndNkejNUHLTq:2ufoTH2w2pYikbeYSX8RYnDkINmq
TLSH
T11B435C003BE98236F27E5BB8ACF22104467AF2676603D55D2CC451DB5B23BC6D9426FA
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1256-0-0x0000000000910000-0x0000000000924000-memory.dmp

Download

memory/1256-1-0x0000000005380000-0x0000000005390000-memory.dmp

Download

memory/1256-2-0x0000000005230000-0x00000000052CC000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads