asyncrat | a933ba6578c19ab0865e9a59089149b8d4f24a0ec2e352a94907077017969eb5

Analysis

max time kernel
590s
max time network
599s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
21-11-2024 11:25

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General

Target

Archivo_Legal.N_83782..exe
Size

2.0MB
MD5

e50b7f6610b164e7530bbd93a2d5c1fb
SHA1

90612e7419eb58c68ad77815ec3439a637c2b0b6
SHA256

311934efae99b694091136c03c7277823018818578c5993e77ddbedd3ae1a166
SHA512

00b5e406703f3e7a9c18dcf7d51e1a9bf1f562ed21cab0f756e3e2ad0f76a69f24f74ec97f2917297de3a32d04c184ebef16307c7eac4538cf39fc95cfc19450
SSDEEP

49152:+hTolMUpPhcAcGaMJ3RYHxUVQgAk10KXBLmKS2EcnQUXj6SELV6HKcnkkdK9lQJf:+kJXV8gdswN/DTFDR

Score

10^/10

asyncrat zzz-oct-31 discovery persistence rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

ZZZ-oct-31

word8328.duckdns.org:8328

Mutex

DcRatMutex_qwqdanchun

Attributes

delay
1
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

Processes:

Archivo_Legal.N_83782..exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\AbzDesignerEditor = "C:\\Users\\Admin\\Music\\AbzDesignerUpdater\\AbzConvertVideo.exe"	Archivo_Legal.N_83782..exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

Archivo_Legal.N_83782..exe

description pid process target process

PID 4320 set thread context of 4460 4320 Archivo_Legal.N_83782..exe csc.exe

description	pid	process	target process
PID 4320 set thread context of 4460	4320	Archivo_Legal.N_83782..exe	csc.exe

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

Processes:

Archivo_Legal.N_83782..execsc.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Archivo_Legal.N_83782..exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csc.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

Archivo_Legal.N_83782..exe

description	pid	process	target process
PID 4320 wrote to memory of 4460	4320	Archivo_Legal.N_83782..exe	csc.exe
PID 4320 wrote to memory of 4460	4320	Archivo_Legal.N_83782..exe	csc.exe
PID 4320 wrote to memory of 4460	4320	Archivo_Legal.N_83782..exe	csc.exe
PID 4320 wrote to memory of 4460	4320	Archivo_Legal.N_83782..exe	csc.exe
PID 4320 wrote to memory of 4460	4320	Archivo_Legal.N_83782..exe	csc.exe

C:\Users\Admin\AppData\Local\Temp\Archivo_Legal.N_83782..exe
"C:\Users\Admin\AppData\Local\Temp\Archivo_Legal.N_83782..exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4320
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4460

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

Replay Monitor

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Downloads

memory/4320-8-0x0000000000400000-0x000000000060D000-memory.dmp

Filesize
2.1MB

Download
memory/4320-0-0x0000000000400000-0x000000000060D000-memory.dmp

Filesize
2.1MB

Download
memory/4320-4-0x0000000000400000-0x000000000060D000-memory.dmp

Filesize
2.1MB

Download
memory/4320-6-0x0000000000400000-0x000000000060D000-memory.dmp

Filesize
2.1MB

Download
memory/4320-5-0x0000000000400000-0x000000000060D000-memory.dmp

Filesize
2.1MB

Download
memory/4320-3-0x0000000000400000-0x000000000060D000-memory.dmp

Filesize
2.1MB

Download
memory/4320-1-0x0000000000407000-0x0000000000420000-memory.dmp

Filesize
100KB

Download
memory/4320-9-0x0000000000400000-0x000000000060D000-memory.dmp

Filesize
2.1MB

Download
memory/4320-12-0x0000000000407000-0x0000000000420000-memory.dmp

Filesize
100KB

Download
memory/4460-7-0x0000000000110000-0x0000000000122000-memory.dmp

Filesize
72KB

Download
memory/4460-10-0x0000000073DBE000-0x0000000073DBF000-memory.dmp

Filesize
4KB

Download
memory/4460-11-0x0000000073DB0000-0x0000000074560000-memory.dmp

Filesize
7.7MB

Download
memory/4460-13-0x0000000073DB0000-0x0000000074560000-memory.dmp

Filesize
7.7MB

Download