asyncrat | febec09783082ac864bc91f22b29291e75effd36954f74b8b227acbaf3cb00d3

Analysis

max time kernel
339s
max time network
339s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
16-11-2024 09:34

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General

Target

AsyncClient.exe
Size

47KB
MD5

aa1cb66d6c0a8299dc78cbfcdac7f235
SHA1

57e58e7fa3848bdea41462d982a38e22cd9b2a09
SHA256

febec09783082ac864bc91f22b29291e75effd36954f74b8b227acbaf3cb00d3
SHA512

b9402c2dee780025d5dcd88923ecb7f1ef79260bc2543a9240cd46215dbd21c3af24503599372ccc7d2b8222993283ece16e09dca0e907a4b9a6e0aaefe02701
SSDEEP

768:uu/6ZTgoiziWUUM9rmo2qrn9bFvPIzNrLkO7fD0bDI7y1v82rcSCuYkvhMFcgMB4:uu/6ZTgle2Y5ozN/kOMb0QvXcJEe9Kdi

Score

10^/10

asyncrat v2 discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

guest-indices.gl.at.ply.gg:60223

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
Asyncrat family
asyncrat

Deletes itself 1 IoCs

pid	Process
2572	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AsyncClient.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1612	timeout.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2504	AsyncClient.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2504 wrote to memory of 2572	2504	AsyncClient.exe	32
PID 2504 wrote to memory of 2572	2504	AsyncClient.exe	32
PID 2504 wrote to memory of 2572	2504	AsyncClient.exe	32
PID 2504 wrote to memory of 2572	2504	AsyncClient.exe	32
PID 2572 wrote to memory of 1612	2572	cmd.exe	34
PID 2572 wrote to memory of 1612	2572	cmd.exe	34
PID 2572 wrote to memory of 1612	2572	cmd.exe	34
PID 2572 wrote to memory of 1612	2572	cmd.exe	34

C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
"C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2504
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpA37C.tmp.bat""
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2572
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1612

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\Cab9704.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\TarC538.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpA37C.tmp.bat

Filesize
163B

MD5
08b06f367f5976a56970350a08ef9c79

SHA1
c214e57d4947fa8aac16b7aeb136d8c22492f347

SHA256
4a95cb93996930d822092579d661b5086e0fbe4afabce99556cb4a504daa8f15

SHA512
13d9ae195dddc2da6e9d09306bd7e05ca57cc45c8adc9b3b040f97b0a8aaa9f75c1cc37a9caeddd4aa967f068d730c8e955dff26f76630951b9f98bb76240e15

Download Submit
memory/2504-0-0x0000000073EDE000-0x0000000073EDF000-memory.dmp

Filesize
4KB

Download
memory/2504-1-0x00000000013E0000-0x00000000013F2000-memory.dmp

Filesize
72KB

Download
memory/2504-2-0x0000000073ED0000-0x00000000745BE000-memory.dmp

Filesize
6.9MB

Download
memory/2504-19-0x0000000073EDE000-0x0000000073EDF000-memory.dmp

Filesize
4KB

Download
memory/2504-20-0x0000000073ED0000-0x00000000745BE000-memory.dmp

Filesize
6.9MB

Download
memory/2504-21-0x00000000008F0000-0x0000000000916000-memory.dmp

Filesize
152KB

Download
memory/2504-41-0x0000000000AC0000-0x0000000000AE4000-memory.dmp

Filesize
144KB

Download
memory/2504-68-0x0000000073ED0000-0x00000000745BE000-memory.dmp

Filesize
6.9MB

Download