asyncrat | 760d61c1b76f9a909e2e427ed60c7cc76ebb32246b8aec5459d882a04482b1ea

General

Target

Client.exe
Size

47KB
MD5

304d41baaa716a6d582877785f93ef68
SHA1

a2b16217d6326c54fbd7ca5586519d50ce3e20ca
SHA256

760d61c1b76f9a909e2e427ed60c7cc76ebb32246b8aec5459d882a04482b1ea
SHA512

2a1f1859bf1ee1ff3be5469d44daf96ba8e6f26e377a6e538e64be815d4e7eb87911b0cbd2cddd3135c2f0e6933151fc47f8aeefa22e7becfa1babb8d38f3a41
SSDEEP

768:59n7mxUzILWCaS+Di1xCKzVixM8YbxgeXP9RavEgK/JXZVc6KN:597AKW1xCGLzb+SPTankJXZVclN

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

C2

127.0.0.1:8848

127.0.0.1:16234

6.tcp.eu.ngrok.io:8848

6.tcp.eu.ngrok.io:16234

Mutex

DcRatMutex_qwqdanchun

Attributes

delay
1
install
true
install_file
WindowsDefender.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
behavioral1/files/0x0009000000014120-14.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2716	WindowsDefender.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs

Web Service

T1102

flow	ioc
26	6.tcp.eu.ngrok.io
7	6.tcp.eu.ngrok.io
21	6.tcp.eu.ngrok.io

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
2580	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2652	timeout.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2368	Client.exe
2368	Client.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2368	Client.exe
Token: SeDebugPrivilege	2716	WindowsDefender.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2368 wrote to memory of 2336	2368	Client.exe	28
PID 2368 wrote to memory of 2336	2368	Client.exe	28
PID 2368 wrote to memory of 2336	2368	Client.exe	28
PID 2368 wrote to memory of 2776	2368	Client.exe	30
PID 2368 wrote to memory of 2776	2368	Client.exe	30
PID 2368 wrote to memory of 2776	2368	Client.exe	30
PID 2336 wrote to memory of 2580	2336	cmd.exe	32
PID 2336 wrote to memory of 2580	2336	cmd.exe	32
PID 2336 wrote to memory of 2580	2336	cmd.exe	32
PID 2776 wrote to memory of 2652	2776	cmd.exe	33
PID 2776 wrote to memory of 2652	2776	cmd.exe	33
PID 2776 wrote to memory of 2652	2776	cmd.exe	33
PID 2776 wrote to memory of 2716	2776	cmd.exe	34
PID 2776 wrote to memory of 2716	2776	cmd.exe	34
PID 2776 wrote to memory of 2716	2776	cmd.exe	34

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:2368
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "WindowsDefender" /tr '"C:\Users\Admin\AppData\Roaming\WindowsDefender.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2336
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "WindowsDefender" /tr '"C:\Users\Admin\AppData\Roaming\WindowsDefender.exe"'
    3⤵
    - Creates scheduled task(s)
    PID:2580
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpBE3.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2776
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2652
- - C:\Users\Admin\AppData\Roaming\WindowsDefender.exe
    "C:\Users\Admin\AppData\Roaming\WindowsDefender.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:2716

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpBE3.tmp.bat

Filesize
158B

MD5
91eb90b79772fc8bcde2b55c53185df3

SHA1
9fd687d84436c1ce487e57f71be834bf2d97c6b5

SHA256
45135da4c4bf86eef7af60370f372b11499dea9b6b7ceacc2539ec86410bdde2

SHA512
4ed4c889b9616acae4784c3cd695981d07841ff78e169411ff4e1c0311d67d19a96993740c190782b6118f427bb1d5251c91e2cbb6cdd412e0ed1749362e8049

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

Filesize
47KB

MD5
304d41baaa716a6d582877785f93ef68

SHA1
a2b16217d6326c54fbd7ca5586519d50ce3e20ca

SHA256
760d61c1b76f9a909e2e427ed60c7cc76ebb32246b8aec5459d882a04482b1ea

SHA512
2a1f1859bf1ee1ff3be5469d44daf96ba8e6f26e377a6e538e64be815d4e7eb87911b0cbd2cddd3135c2f0e6933151fc47f8aeefa22e7becfa1babb8d38f3a41

Download Submit
memory/2368-0-0x0000000000310000-0x0000000000322000-memory.dmp

Filesize
72KB

Download
memory/2368-1-0x000007FEF5C90000-0x000007FEF667C000-memory.dmp

Filesize
9.9MB

Download
memory/2368-2-0x000000001AB40000-0x000000001ABC0000-memory.dmp

Filesize
512KB

Download
memory/2368-11-0x000007FEF5C90000-0x000007FEF667C000-memory.dmp

Filesize
9.9MB

Download
memory/2716-16-0x0000000000280000-0x0000000000292000-memory.dmp

Filesize
72KB

Download
memory/2716-17-0x000007FEF52A0000-0x000007FEF5C8C000-memory.dmp

Filesize
9.9MB

Download
memory/2716-18-0x000000001AEB0000-0x000000001AF30000-memory.dmp

Filesize
512KB

Download
memory/2716-19-0x000007FEF52A0000-0x000007FEF5C8C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads