asyncrat | 594fba274e35ea62c45899c7d1e2255bc5f3b745429b10e8d2453b59c2a8c27f

General

Target

Infected.exe
Size

63KB
MD5

94bf02bd2695d3600f8ee7a64d69d1f5
SHA1

2b8898aa83db48d154205a3361effd6d693e4fa8
SHA256

594fba274e35ea62c45899c7d1e2255bc5f3b745429b10e8d2453b59c2a8c27f
SHA512

6e4fa49d2ced8e6f37432e25ec21fe827016201db40f902926d68a89e30d0dd2b0f5ca48af1c79da7ce51f3d30d8865397759cf0ac7e4aac318a8c8250c6c7f7
SSDEEP

768:fDALAFjT678p4C8A+XeuazcBRL5JTk1+T4KSBGHmDbD/ph0oXIwjfWcSuAdpqKYC:cqTQJdSJYUbdh9IwjfiuAdpqKmY7

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

127.1.0.0:3232

Attributes

delay
1
install
true
install_file
DocumentPerformanceEvents.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/0x00090000000122cf-15.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2692	DocumentPerformanceEvents.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
2552	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
2908	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2636	Infected.exe
2636	Infected.exe
2636	Infected.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2636	Infected.exe
Token: SeDebugPrivilege	2692	DocumentPerformanceEvents.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2636 wrote to memory of 2680	2636	Infected.exe	30
PID 2636 wrote to memory of 2680	2636	Infected.exe	30
PID 2636 wrote to memory of 2680	2636	Infected.exe	30
PID 2636 wrote to memory of 2704	2636	Infected.exe	31
PID 2636 wrote to memory of 2704	2636	Infected.exe	31
PID 2636 wrote to memory of 2704	2636	Infected.exe	31
PID 2680 wrote to memory of 2908	2680	cmd.exe	34
PID 2680 wrote to memory of 2908	2680	cmd.exe	34
PID 2680 wrote to memory of 2908	2680	cmd.exe	34
PID 2704 wrote to memory of 2552	2704	cmd.exe	35
PID 2704 wrote to memory of 2552	2704	cmd.exe	35
PID 2704 wrote to memory of 2552	2704	cmd.exe	35
PID 2704 wrote to memory of 2692	2704	cmd.exe	36
PID 2704 wrote to memory of 2692	2704	cmd.exe	36
PID 2704 wrote to memory of 2692	2704	cmd.exe	36

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\Infected.exe
"C:\Users\Admin\AppData\Local\Temp\Infected.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2636
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "DocumentPerformanceEvents" /tr '"C:\Users\Admin\AppData\Roaming\DocumentPerformanceEvents.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2680
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "DocumentPerformanceEvents" /tr '"C:\Users\Admin\AppData\Roaming\DocumentPerformanceEvents.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2908
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp5CC0.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2704
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2552
- - C:\Users\Admin\AppData\Roaming\DocumentPerformanceEvents.exe
    "C:\Users\Admin\AppData\Roaming\DocumentPerformanceEvents.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:2692

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

1

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\tmp5CC0.tmp.bat

Filesize
169B

MD5
fb4505a3541b136fe1fc946cfb278a24

SHA1
daea67614c5913a1a09c5c99a2b523baf57639b3

SHA256
596d501acf3bd8862ebc0f965e8f63e0f4db5d0905b1d72e96eb10a6ae30d17b

SHA512
15fde1464afc4c5073d9cc9af7ff22f9a0ccca5346d4f2fcf0e78632666eb5baef8a25a782d12f80aae8641d88302d3fbcafa3255baf886163434ecc1670bb5e

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

Filesize
63KB

MD5
94bf02bd2695d3600f8ee7a64d69d1f5

SHA1
2b8898aa83db48d154205a3361effd6d693e4fa8

SHA256
594fba274e35ea62c45899c7d1e2255bc5f3b745429b10e8d2453b59c2a8c27f

SHA512
6e4fa49d2ced8e6f37432e25ec21fe827016201db40f902926d68a89e30d0dd2b0f5ca48af1c79da7ce51f3d30d8865397759cf0ac7e4aac318a8c8250c6c7f7

Download Submit
memory/2636-0-0x000007FEF4EB3000-0x000007FEF4EB4000-memory.dmp

Filesize
4KB

Download
memory/2636-1-0x0000000001380000-0x0000000001396000-memory.dmp

Filesize
88KB

Download
memory/2636-2-0x000007FEF4EB0000-0x000007FEF589C000-memory.dmp

Filesize
9.9MB

Download
memory/2636-3-0x000007FEF4EB0000-0x000007FEF589C000-memory.dmp

Filesize
9.9MB

Download
memory/2636-12-0x000007FEF4EB0000-0x000007FEF589C000-memory.dmp

Filesize
9.9MB

Download
memory/2692-17-0x0000000000900000-0x0000000000916000-memory.dmp

Filesize
88KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads