asyncrat | 4d1fa4a04980a77e88dc4e9e3bcbf91f5dfe64d57fb52276f01cfac19704b459

General

Target

Client.exe
Size

74KB
MD5

a43b6b601b7847ce56c9c06fb89d027c
SHA1

47e950515cacdfc73b3ee4a16645f40625c916e1
SHA256

4d1fa4a04980a77e88dc4e9e3bcbf91f5dfe64d57fb52276f01cfac19704b459
SHA512

213208c1f0e7caccb1ed9a3d59d9565549ea5f90baad127bdb8c223fb03c7b148737aac9a595f5c22fbe3de199f6ff31919f7fb6ec6aeb0f93d41ea1516e39b5
SSDEEP

1536:cUKkcx9pXCTyPMVWe9VdQuDI6H1bf/CQ3QzcjMVclN:cUDcx958yPMVWe9VdQsH1bf6Q3QuOY

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

C2

147.185.221.20:49485

Mutex

gwbhzwlfrv

Attributes

delay
1
install
true
install_file
Discord.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
behavioral3/files/0x001b00000002ab1b-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
4216	Discord.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3612	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
1004	schtasks.exe

Suspicious behavior: EnumeratesProcesses 20 IoCs

pid	Process
2464	Client.exe
2464	Client.exe
2464	Client.exe
2464	Client.exe
2464	Client.exe
2464	Client.exe
2464	Client.exe
2464	Client.exe
2464	Client.exe
2464	Client.exe
2464	Client.exe
2464	Client.exe
2464	Client.exe
2464	Client.exe
2464	Client.exe
2464	Client.exe
2464	Client.exe
4216	Discord.exe
4216	Discord.exe
4216	Discord.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2464	Client.exe
Token: SeDebugPrivilege	4216	Discord.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4216	Discord.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2464 wrote to memory of 3732	2464	Client.exe	77
PID 2464 wrote to memory of 3732	2464	Client.exe	77
PID 2464 wrote to memory of 3164	2464	Client.exe	79
PID 2464 wrote to memory of 3164	2464	Client.exe	79
PID 3164 wrote to memory of 3612	3164	cmd.exe	81
PID 3164 wrote to memory of 3612	3164	cmd.exe	81
PID 3732 wrote to memory of 1004	3732	cmd.exe	82
PID 3732 wrote to memory of 1004	3732	cmd.exe	82
PID 3164 wrote to memory of 4216	3164	cmd.exe	83
PID 3164 wrote to memory of 4216	3164	cmd.exe	83

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\Client.exe
"C:\Users\Admin\AppData\Local\Temp\Client.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2464
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Discord" /tr '"C:\Users\Admin\AppData\Roaming\Discord.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3732
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Discord" /tr '"C:\Users\Admin\AppData\Roaming\Discord.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1004
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp6D8F.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3164
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3612
- - C:\Users\Admin\AppData\Roaming\Discord.exe
    "C:\Users\Admin\AppData\Roaming\Discord.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:4216

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

2

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp6D8F.tmp.bat

Filesize
151B

MD5
dd7ddf8110ba577c27a6ef7619203ced

SHA1
51eacae85cc5bd1ee85723203eca2228143f7de9

SHA256
9b90ce6556a037c5f08b760f5ab1d0bc410a215544d9a195465309f575291ecb

SHA512
9a10ecbdb6f0e97d11c76162ae9000b4b6819ea81d8457c82d1829f2c564d67bb91c437bf9b91ac66621aa2e211a6bdad4861e440d0bca023fbe676cb6f0fba5

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

Filesize
74KB

MD5
a43b6b601b7847ce56c9c06fb89d027c

SHA1
47e950515cacdfc73b3ee4a16645f40625c916e1

SHA256
4d1fa4a04980a77e88dc4e9e3bcbf91f5dfe64d57fb52276f01cfac19704b459

SHA512
213208c1f0e7caccb1ed9a3d59d9565549ea5f90baad127bdb8c223fb03c7b148737aac9a595f5c22fbe3de199f6ff31919f7fb6ec6aeb0f93d41ea1516e39b5

Download Submit
C:\Users\Admin\AppData\Roaming\MyData\DataLogs.conf

Filesize
8B

MD5
cf759e4c5f14fe3eec41b87ed756cea8

SHA1
c27c796bb3c2fac929359563676f4ba1ffada1f5

SHA256
c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

SHA512
c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

Download Submit
memory/2464-0-0x00007FF94CB73000-0x00007FF94CB75000-memory.dmp

Filesize
8KB

Download
memory/2464-1-0x0000000000CA0000-0x0000000000CB8000-memory.dmp

Filesize
96KB

Download
memory/2464-3-0x00007FF94CB70000-0x00007FF94D632000-memory.dmp

Filesize
10.8MB

Download
memory/2464-4-0x00007FF94CB70000-0x00007FF94D632000-memory.dmp

Filesize
10.8MB

Download
memory/2464-10-0x00007FF94CB70000-0x00007FF94D632000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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