asyncrat | 95bab70aa35fa3b403de445c883dcaa84998690ffb54d3a8f9d25a19e5e36f42

Analysis

max time kernel
143s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
26/04/2023, 17:25

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General

Target
AsyncRat.exe
Size 2.6MB
Sample230426-vzbvmacf5y
SHA256 95bab70aa35fa3b403de445c883dcaa84998690ffb54d3a8f9d25a19e5e36f42
MD5 c210607e74baffc542110c60378fb034
SHA1 73aa5dfa9a796fc8adc83ddb82375e17ccab28c0
SHA512 6d5c9019728af047a0e904c7d12a7db8af34b00ac289a279af937be47aa38fab077571315b15ae13bc68f8e17bfcd6ae5d779bb988e5887fe8cbbde0e9c50376
SSDEEP 24576:HUIog50eJ8FmTPCeZ6FW0dHnulKtu1Dze6HDpLtllJz8+iTODtMm8VyRbNvvLDAi:H3b8FmTGmd2OxSHxoZdMK7ajwVwg
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

15.235.130.74:6606
15.235.130.74:7707
15.235.130.74:8808

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
false
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
behavioral2/memory/4864-162-0x0000000000400000-0x0000000000412000-memory.dmp	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-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation	AsyncRat.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5040 set thread context of 4864	5040	AsyncRat.exe	94

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1556	powershell.exe
1556	powershell.exe
5040	AsyncRat.exe
5040	AsyncRat.exe
5040	AsyncRat.exe
5040	AsyncRat.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1556	powershell.exe
Token: SeDebugPrivilege	5040	AsyncRat.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 5040 wrote to memory of 1556	5040	AsyncRat.exe	84
PID 5040 wrote to memory of 1556	5040	AsyncRat.exe	84
PID 5040 wrote to memory of 1556	5040	AsyncRat.exe	84
PID 5040 wrote to memory of 4944	5040	AsyncRat.exe	92
PID 5040 wrote to memory of 4944	5040	AsyncRat.exe	92
PID 5040 wrote to memory of 4944	5040	AsyncRat.exe	92
PID 5040 wrote to memory of 1320	5040	AsyncRat.exe	93
PID 5040 wrote to memory of 1320	5040	AsyncRat.exe	93
PID 5040 wrote to memory of 1320	5040	AsyncRat.exe	93
PID 5040 wrote to memory of 4864	5040	AsyncRat.exe	94
PID 5040 wrote to memory of 4864	5040	AsyncRat.exe	94
PID 5040 wrote to memory of 4864	5040	AsyncRat.exe	94
PID 5040 wrote to memory of 4864	5040	AsyncRat.exe	94
PID 5040 wrote to memory of 4864	5040	AsyncRat.exe	94
PID 5040 wrote to memory of 4864	5040	AsyncRat.exe	94
PID 5040 wrote to memory of 4864	5040	AsyncRat.exe	94
PID 5040 wrote to memory of 4864	5040	AsyncRat.exe	94

C:\Users\Admin\AppData\Local\Temp\AsyncRat.exe
"C:\Users\Admin\AppData\Local\Temp\AsyncRat.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5040
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1556
- C:\Users\Admin\AppData\Local\Temp\AsyncRat.exe
  C:\Users\Admin\AppData\Local\Temp\AsyncRat.exe
  2⤵
  PID:4944
- C:\Users\Admin\AppData\Local\Temp\AsyncRat.exe
  C:\Users\Admin\AppData\Local\Temp\AsyncRat.exe
  2⤵
  PID:1320
- C:\Users\Admin\AppData\Local\Temp\AsyncRat.exe
  C:\Users\Admin\AppData\Local\Temp\AsyncRat.exe
  2⤵
  PID:4864

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

AsyncRat.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\AsyncRat.exe.log
Size 1KB
SHA256 99e3f1c991f3d56f3d3d504ac80f0a1c995ef7a983a425b6701e743f455cf83c
MD5 07dff301593b27ca4a2f0aedecd8eab8
SHA1 443544108040876b5c291090d6f9a5ff231b8180
SHA512 45bbd2963b6855e8840e43b66f0fc7ea91216c5bd7652a90b0c3db31bded2cdb23713a079231170464b1cd02252f3dd7633efc703e1a2b42e1e2bb4f8102c052
MD5 SHA1 SHA512

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__PSScriptPolicyTest_u4ywawbd.yjz.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_u4ywawbd.yjz.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/1556-151-0x0000000005CE0000-0x0000000005CFE000-memory.dmp

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memory/1556-152-0x0000000004A30000-0x0000000004A40000-memory.dmp

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memory/1556-137-0x0000000005070000-0x0000000005698000-memory.dmp

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memory/1556-138-0x0000000004A30000-0x0000000004A40000-memory.dmp

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memory/1556-139-0x0000000004A30000-0x0000000004A40000-memory.dmp

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memory/1556-140-0x0000000004FB0000-0x0000000005016000-memory.dmp

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memory/1556-141-0x0000000005710000-0x0000000005776000-memory.dmp

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memory/1556-158-0x0000000004A30000-0x0000000004A40000-memory.dmp

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memory/1556-157-0x0000000004A30000-0x0000000004A40000-memory.dmp

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memory/1556-136-0x00000000023E0000-0x0000000002416000-memory.dmp

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memory/1556-153-0x0000000007320000-0x000000000799A000-memory.dmp

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memory/1556-154-0x00000000061E0000-0x00000000061FA000-memory.dmp

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memory/1556-156-0x0000000004A30000-0x0000000004A40000-memory.dmp

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memory/4864-162-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/4864-165-0x0000000005160000-0x0000000005170000-memory.dmp

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memory/4864-166-0x0000000005160000-0x0000000005170000-memory.dmp

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memory/5040-155-0x00000000029F0000-0x0000000002A00000-memory.dmp

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memory/5040-133-0x0000000000310000-0x00000000005BC000-memory.dmp

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memory/5040-135-0x0000000005730000-0x0000000005752000-memory.dmp

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memory/5040-134-0x00000000029F0000-0x0000000002A00000-memory.dmp

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