asyncrat | 4fcbfbd8040986b39b1d7661adf8cc6451c24aa4b607b9212793f77526ce79af

General

Target

Discord.exe
Size

71KB
MD5

045c870906097c7aa54d257382471115
SHA1

bea629242fb4facf3fd1de1f86ce3e2811777520
SHA256

025ce30902b4a9cade0381c523ac27d67c0598743ba2675e7efd3669ec8ff141
SHA512

cf89a37c99c52db276233c0371952c5595448299f7d3d0372f456f5c1dbe3037a2e14d61ef98685739fb71f728879169247afcc9e1da549d31b5bb52407c785c
SSDEEP

768:gucNE9IL2C6y+DiPdPiBLVisiW0zUYbhge7tkeGqm77rvEgK/Jrpp6uB3+Vc6KN:Ncy2RCUe0zbbOzeGqCnkJrpp66+VclN

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

C2

185.65.134.165:55160

Mutex

DcRatMutex_qwqdanchun

Attributes

delay
1
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/0x0008000000023c93-11.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-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	Discord.exe

Executes dropped EXE 1 IoCs

pid	Process
688	svchost.exe

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
1980	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
3196	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
4524	Discord.exe
4524	Discord.exe
4524	Discord.exe
4524	Discord.exe
4524	Discord.exe
4524	Discord.exe
4524	Discord.exe
4524	Discord.exe
4524	Discord.exe
4524	Discord.exe
4524	Discord.exe
4524	Discord.exe
4524	Discord.exe
4524	Discord.exe
4524	Discord.exe
4524	Discord.exe
4524	Discord.exe
4524	Discord.exe
4524	Discord.exe
4524	Discord.exe
4524	Discord.exe
4524	Discord.exe
4524	Discord.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4524	Discord.exe
Token: SeDebugPrivilege	688	svchost.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4524 wrote to memory of 2880	4524	Discord.exe	83
PID 4524 wrote to memory of 2880	4524	Discord.exe	83
PID 4524 wrote to memory of 4212	4524	Discord.exe	85
PID 4524 wrote to memory of 4212	4524	Discord.exe	85
PID 2880 wrote to memory of 3196	2880	cmd.exe	87
PID 2880 wrote to memory of 3196	2880	cmd.exe	87
PID 4212 wrote to memory of 1980	4212	cmd.exe	88
PID 4212 wrote to memory of 1980	4212	cmd.exe	88
PID 4212 wrote to memory of 688	4212	cmd.exe	90
PID 4212 wrote to memory of 688	4212	cmd.exe	90

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\Discord.exe
"C:\Users\Admin\AppData\Local\Temp\Discord.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4524
- C:\Windows\System32\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⤵
  - Suspicious use of WriteProcessMemory
  PID:2880
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3196
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpB769.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4212
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1980
- - C:\Users\Admin\AppData\Roaming\svchost.exe
    "C:\Users\Admin\AppData\Roaming\svchost.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:688

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

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmpB769.tmp.bat

Filesize
151B

MD5
4fb3758b179db49c96b4a652b51880b5

SHA1
fa96bad011db5fbaed3fea9867d31f53dfbf9921

SHA256
b8e3c6e865bb07b9c7d07545667d4272e5d4c7906f7c4ce1b5971faf62728410

SHA512
5f1426f4062536d556e148262eb6f657bf638ad0b7fe2db6df0c24aa42387f31f0f6d76b85d2c4c4b1a721376f0fc25fe1096db832f8eccb7f327e94c71c83cd

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

Filesize
71KB

MD5
045c870906097c7aa54d257382471115

SHA1
bea629242fb4facf3fd1de1f86ce3e2811777520

SHA256
025ce30902b4a9cade0381c523ac27d67c0598743ba2675e7efd3669ec8ff141

SHA512
cf89a37c99c52db276233c0371952c5595448299f7d3d0372f456f5c1dbe3037a2e14d61ef98685739fb71f728879169247afcc9e1da549d31b5bb52407c785c

Download Submit
memory/4524-0-0x00007FF940393000-0x00007FF940395000-memory.dmp

Filesize
8KB

Download
memory/4524-1-0x00000000007C0000-0x00000000007D8000-memory.dmp

Filesize
96KB

Download
memory/4524-2-0x00007FF940390000-0x00007FF940E51000-memory.dmp

Filesize
10.8MB

Download
memory/4524-7-0x00007FF940390000-0x00007FF940E51000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads