asyncrat | e2025b1f07285cf7a6cb0dbcd05933db631202a3af5af06719548f01ba2fe73f

General

Target

Loader.exe
Size

63KB
MD5

004ba87604ac07c77d161b96bfd97a34
SHA1

8f089b87f831946c617af9702ba79d20ddaf7394
SHA256

bfbef5852faa1e2de88f380c620af93eb08114363c1d72d74d5809e7ff70f881
SHA512

322a6fc44d0390ad55a7bf0cfe268814e00df2e757a8088d11d7addd9d2b089e4c62d4c955f2272b7ec50033e68a59f72778912cbae125e01c5b74c1b2909b8a
SSDEEP

768:Cuw6LVcsTPq781wC8A+Xjapeyr61urX1+T4uoSBGHmDbDTph0oXzkKhbSuEdpqKX:LeQPcUn0tYUbJh9zkw+uEdpqKmY7

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

anyone-blogging.gl.at.ply.gg:22284

Attributes

delay
1
install
true
install_file
Windows.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
behavioral4/files/0x000b0000000233d4-10.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-1-5-21-1750093773-264148664-1320403265-1000\Control Panel\International\Geo\Nation	Loader.exe

Executes dropped EXE 1 IoCs

pid	Process
3632	Windows.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
2640	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
3100	schtasks.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
5096	Loader.exe
5096	Loader.exe
5096	Loader.exe
5096	Loader.exe
5096	Loader.exe
5096	Loader.exe
5096	Loader.exe
5096	Loader.exe
5096	Loader.exe
5096	Loader.exe
5096	Loader.exe
5096	Loader.exe
5096	Loader.exe
5096	Loader.exe
5096	Loader.exe
5096	Loader.exe
5096	Loader.exe
5096	Loader.exe
5096	Loader.exe
5096	Loader.exe
5096	Loader.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	5096	Loader.exe
Token: SeDebugPrivilege	5096	Loader.exe
Token: SeDebugPrivilege	3632	Windows.exe
Token: SeDebugPrivilege	3632	Windows.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 5096 wrote to memory of 3956	5096	Loader.exe	86
PID 5096 wrote to memory of 3956	5096	Loader.exe	86
PID 5096 wrote to memory of 4664	5096	Loader.exe	88
PID 5096 wrote to memory of 4664	5096	Loader.exe	88
PID 4664 wrote to memory of 2640	4664	cmd.exe	90
PID 4664 wrote to memory of 2640	4664	cmd.exe	90
PID 3956 wrote to memory of 3100	3956	cmd.exe	91
PID 3956 wrote to memory of 3100	3956	cmd.exe	91
PID 4664 wrote to memory of 3632	4664	cmd.exe	92
PID 4664 wrote to memory of 3632	4664	cmd.exe	92

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\Loader.exe
"C:\Users\Admin\AppData\Local\Temp\Loader.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5096
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Windows" /tr '"C:\Users\Admin\AppData\Roaming\Windows.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3956
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Windows" /tr '"C:\Users\Admin\AppData\Roaming\Windows.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3100
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp66F7.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4664
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2640
- - C:\Users\Admin\AppData\Roaming\Windows.exe
    "C:\Users\Admin\AppData\Roaming\Windows.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:3632

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp66F7.tmp.bat

Filesize
151B

MD5
233e99503329abaf1e399f1c4b89e9ae

SHA1
fa4ed380b40c70dbf30780dec7822c1722eb8441

SHA256
e59dbce5c68ad15a6670f489649e9512caa1749f8b8b6822810cf200dec3acde

SHA512
489b78ea3400b8067eadf3266052a83f49f5d2de3113076a680cc7b410e7758c93d6770c9a2f8d7ba6f490e8449594ced4e2c67f416a761dbeee7396a28257c9

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

Filesize
63KB

MD5
004ba87604ac07c77d161b96bfd97a34

SHA1
8f089b87f831946c617af9702ba79d20ddaf7394

SHA256
bfbef5852faa1e2de88f380c620af93eb08114363c1d72d74d5809e7ff70f881

SHA512
322a6fc44d0390ad55a7bf0cfe268814e00df2e757a8088d11d7addd9d2b089e4c62d4c955f2272b7ec50033e68a59f72778912cbae125e01c5b74c1b2909b8a

Download Submit
memory/5096-0-0x0000000000770000-0x0000000000786000-memory.dmp

Filesize
88KB

Download
memory/5096-1-0x00007FFB4A883000-0x00007FFB4A885000-memory.dmp

Filesize
8KB

Download
memory/5096-2-0x00007FFB4A880000-0x00007FFB4B341000-memory.dmp

Filesize
10.8MB

Download
memory/5096-7-0x00007FFB4A880000-0x00007FFB4B341000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads