asyncrat | 36edf4090f6e91fdc91a9bc3ec1f94c8cabad7ee22dface2651e1f01c1730ab8

Analysis

max time kernel
120s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
02-08-2024 20:28

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General

Target

36edf4090f6e91fdc91a9bc3ec1f94c8cabad7ee22dface2651e1f01c1730ab8.exe
Size

10.0MB
MD5

6b7aeb6425309816ce65f2108e52905a
SHA1

ccf1c022af31320e924739ea194bf31178a3fe9a
SHA256

36edf4090f6e91fdc91a9bc3ec1f94c8cabad7ee22dface2651e1f01c1730ab8
SHA512

4fecd428998c5fa0d0f8a709784150c6a0d4cd463936e4164fd3caeaa12363b3cf1129fa29233ce066510683fa0efd9acdb222473ee7e3406c2a246ceccacc01
SSDEEP

49152:YDzPnpt41VxiQFl60I4fbWgi2FJq3AhnY4F/HKx3/:4Ppt41HiylHnTqw6Kv+

Score

10^/10

asyncrat julio 31 discovery persistence rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

julio 31

estefmedina27.duckdns.org:9090

Mutex

firewallrtfghyulgsmmkliyrefdswaqbloi

Attributes

delay
15
install
false
install_file
firewall
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat 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-1-5-21-2412658365-3084825385-3340777666-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ExpressVpnUpdater = "C:\\Users\\Admin\\Pictures\\Expressvpn\\ExpressVpn.exe"	36edf4090f6e91fdc91a9bc3ec1f94c8cabad7ee22dface2651e1f01c1730ab8.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1812 set thread context of 4468	1812	36edf4090f6e91fdc91a9bc3ec1f94c8cabad7ee22dface2651e1f01c1730ab8.exe	85

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	36edf4090f6e91fdc91a9bc3ec1f94c8cabad7ee22dface2651e1f01c1730ab8.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csc.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4468	csc.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1812 wrote to memory of 4468	1812	36edf4090f6e91fdc91a9bc3ec1f94c8cabad7ee22dface2651e1f01c1730ab8.exe	85
PID 1812 wrote to memory of 4468	1812	36edf4090f6e91fdc91a9bc3ec1f94c8cabad7ee22dface2651e1f01c1730ab8.exe	85
PID 1812 wrote to memory of 4468	1812	36edf4090f6e91fdc91a9bc3ec1f94c8cabad7ee22dface2651e1f01c1730ab8.exe	85
PID 1812 wrote to memory of 4468	1812	36edf4090f6e91fdc91a9bc3ec1f94c8cabad7ee22dface2651e1f01c1730ab8.exe	85
PID 1812 wrote to memory of 4468	1812	36edf4090f6e91fdc91a9bc3ec1f94c8cabad7ee22dface2651e1f01c1730ab8.exe	85

C:\Users\Admin\AppData\Local\Temp\36edf4090f6e91fdc91a9bc3ec1f94c8cabad7ee22dface2651e1f01c1730ab8.exe
"C:\Users\Admin\AppData\Local\Temp\36edf4090f6e91fdc91a9bc3ec1f94c8cabad7ee22dface2651e1f01c1730ab8.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1812
- 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
  - Suspicious use of AdjustPrivilegeToken
  PID:4468

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/1812-5-0x0000000000400000-0x00000000007EA000-memory.dmp

Filesize
3.9MB

Download
memory/1812-1-0x0000000000410000-0x000000000042A000-memory.dmp

Filesize
104KB

Download
memory/1812-2-0x0000000000400000-0x00000000007EA000-memory.dmp

Filesize
3.9MB

Download
memory/1812-3-0x0000000000400000-0x00000000007EA000-memory.dmp

Filesize
3.9MB

Download
memory/1812-0-0x0000000000400000-0x00000000007EA000-memory.dmp

Filesize
3.9MB

Download
memory/4468-6-0x000000007425E000-0x000000007425F000-memory.dmp

Filesize
4KB

Download
memory/4468-4-0x00000000006F0000-0x0000000000702000-memory.dmp

Filesize
72KB

Download
memory/4468-7-0x0000000074250000-0x0000000074A00000-memory.dmp

Filesize
7.7MB

Download
memory/4468-8-0x0000000005820000-0x00000000058BC000-memory.dmp

Filesize
624KB

Download
memory/4468-9-0x0000000005E70000-0x0000000006414000-memory.dmp

Filesize
5.6MB

Download
memory/4468-10-0x0000000005930000-0x0000000005996000-memory.dmp

Filesize
408KB

Download
memory/4468-11-0x0000000074250000-0x0000000074A00000-memory.dmp

Filesize
7.7MB

Download
memory/4468-12-0x000000007425E000-0x000000007425F000-memory.dmp

Filesize
4KB

Download
memory/4468-13-0x0000000074250000-0x0000000074A00000-memory.dmp

Filesize
7.7MB

Download
memory/4468-14-0x0000000074250000-0x0000000074A00000-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