asyncrat | 7fcb98579512e3df028c8199b530d8e027d55a871d2afb81aeb5994adac814bf

Analysis

max time kernel
143s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
08-01-2025 06:16

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General

Target

JaffaCakes118_8febef9e39284335678e45955722d6a6.exe
Size

617KB
MD5

8febef9e39284335678e45955722d6a6
SHA1

0f5de2557c7cef0c486157089cf2b761ca8839d7
SHA256

7fcb98579512e3df028c8199b530d8e027d55a871d2afb81aeb5994adac814bf
SHA512

e8b70e73b960b4fa3fa209baaf702990dc4a153cca85eca5a9586ab42dab82d99d6ecec15c9ed043cca2637710f2921f94b2a2b934c9960fe36514cdf4ceacbf
SSDEEP

6144:dC4w8juap56y9dg4sIo9ZCf6YRZDYnDSb+Ox72aR914w6Fs2gVKiEgNaratgMZ:Ynapvg4sz9dYRZsDy+M70sdpEmar3MZ

Score

10^/10

asyncrat 1 discovery persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

185.157.160.136:1973

Mutex

df4Rtg34dFjwr7ujp3

Attributes

delay
38
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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rka = "C:\\Users\\Admin\\AppData\\Roaming\\rga\\rpa.exe"	JaffaCakes118_8febef9e39284335678e45955722d6a6.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4500 set thread context of 2440	4500	JaffaCakes118_8febef9e39284335678e45955722d6a6.exe	83

System Location Discovery: System Language Discovery 1 TTPs 2 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	JaffaCakes118_8febef9e39284335678e45955722d6a6.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegSvcs.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4500	JaffaCakes118_8febef9e39284335678e45955722d6a6.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4500 wrote to memory of 2440	4500	JaffaCakes118_8febef9e39284335678e45955722d6a6.exe	83
PID 4500 wrote to memory of 2440	4500	JaffaCakes118_8febef9e39284335678e45955722d6a6.exe	83
PID 4500 wrote to memory of 2440	4500	JaffaCakes118_8febef9e39284335678e45955722d6a6.exe	83
PID 4500 wrote to memory of 2440	4500	JaffaCakes118_8febef9e39284335678e45955722d6a6.exe	83
PID 4500 wrote to memory of 2440	4500	JaffaCakes118_8febef9e39284335678e45955722d6a6.exe	83
PID 4500 wrote to memory of 2440	4500	JaffaCakes118_8febef9e39284335678e45955722d6a6.exe	83
PID 4500 wrote to memory of 2440	4500	JaffaCakes118_8febef9e39284335678e45955722d6a6.exe	83
PID 4500 wrote to memory of 2440	4500	JaffaCakes118_8febef9e39284335678e45955722d6a6.exe	83

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_8febef9e39284335678e45955722d6a6.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_8febef9e39284335678e45955722d6a6.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4500
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2440

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/2440-4-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2440-5-0x0000000073DBE000-0x0000000073DBF000-memory.dmp

Filesize
4KB

Download
memory/2440-6-0x0000000073DBE000-0x0000000073DBF000-memory.dmp

Filesize
4KB

Download
memory/2440-7-0x0000000073DB0000-0x0000000074560000-memory.dmp

Filesize
7.7MB

Download
memory/2440-8-0x0000000073DB0000-0x0000000074560000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads