asyncrat | e73c96538ec60c2117b6ed82b7f95f8894abed022ee9ab03c1be90ebd9722f06

General

Target

SYS.exe
Size

226KB
MD5

1bf114677a69802600ff29c5ce65f464
SHA1

9d05e8414eea793f8260bfb05f359c9b056c7e43
SHA256

57b0c0581e640d275739c192361ec44d4d2af6db1dc74ea4e7e77e1c5e666736
SHA512

d111b149ef24c165976dd37a16e5525f73752a4f3ec66d0cf4faace019e27a8e09815655bbdfe428791dbda365e1172819a820df19d0a5647f21fcadf1afabe2
SSDEEP

3072:S+STW8djpN6izj8mZw7qe73gROUbBK+QIuhuDGRTgVK6+Wpd:P8XN6W8mm7qeJUbopIIeK

Score

10^/10

asyncrat stormkitty default discovery persistence privilege_escalation rat spyware stealer

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

https://api.telegram.org/bot7170788789:AAFDgtgiOhG8owpmypRYbNLRYrxlniuiyIs/sendMessage?chat_id=6101540297

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
StormKitty
StormKitty is an open source info stealer written in C#.
stealer stormkitty

StormKitty payload 1 IoCs

resource	yara_rule
behavioral3/memory/4100-1-0x0000000000E10000-0x0000000000E4E000-memory.dmp	family_stormkitty

Stormkitty family
stormkitty
Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Drops desktop.ini file(s) 8 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Local\a77ad8e141853a696cf469fe9d86fd45\Admin@OZMCVSQS_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini	SYS.exe
File created	C:\Users\Admin\AppData\Local\a77ad8e141853a696cf469fe9d86fd45\Admin@OZMCVSQS_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Camera Roll\desktop.ini	SYS.exe
File created	C:\Users\Admin\AppData\Local\a77ad8e141853a696cf469fe9d86fd45\Admin@OZMCVSQS_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Saved Pictures\desktop.ini	SYS.exe
File created	C:\Users\Admin\AppData\Local\a77ad8e141853a696cf469fe9d86fd45\Admin@OZMCVSQS_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	SYS.exe
File created	C:\Users\Admin\AppData\Local\a77ad8e141853a696cf469fe9d86fd45\Admin@OZMCVSQS_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	SYS.exe
File opened for modification	C:\Users\Admin\AppData\Local\a77ad8e141853a696cf469fe9d86fd45\Admin@OZMCVSQS_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	SYS.exe
File opened for modification	C:\Users\Admin\AppData\Local\a77ad8e141853a696cf469fe9d86fd45\Admin@OZMCVSQS_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	SYS.exe
File created	C:\Users\Admin\AppData\Local\a77ad8e141853a696cf469fe9d86fd45\Admin@OZMCVSQS_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini	SYS.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
15	icanhazip.com

Looks up geolocation information via web service
Uses a legitimate geolocation service to find the infected system's geolocation info.
Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217

Event Triggered Execution: Netsh Helper DLL 1 TTPs 6 IoCs

Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

persistence privilege_escalation

Netsh Helper DLL

T1546.007

description	ioc	Process
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

System Location Discovery: System Language Discovery 1 TTPs 8 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	chcp.com
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	findstr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	chcp.com
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	SYS.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

System Network Configuration Discovery: Wi-Fi Discovery 1 TTPs 2 IoCs

Adversaries may search for information about Wi-Fi networks, such as network names and passwords, on compromised systems.

discovery

Wi-Fi Discovery

T1016.002

pid	Process
4552	cmd.exe
3280	netsh.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	SYS.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	SYS.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
4100	SYS.exe
4100	SYS.exe
4100	SYS.exe
4100	SYS.exe
4100	SYS.exe
4100	SYS.exe
4100	SYS.exe
4100	SYS.exe
4100	SYS.exe
4100	SYS.exe
4100	SYS.exe
4100	SYS.exe
4100	SYS.exe
4100	SYS.exe
4100	SYS.exe
4100	SYS.exe
4100	SYS.exe
4100	SYS.exe
4100	SYS.exe
4100	SYS.exe
4100	SYS.exe
4100	SYS.exe
4100	SYS.exe
4100	SYS.exe
4100	SYS.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4100	SYS.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 4100 wrote to memory of 4552	4100	SYS.exe	83
PID 4100 wrote to memory of 4552	4100	SYS.exe	83
PID 4100 wrote to memory of 4552	4100	SYS.exe	83
PID 4552 wrote to memory of 2964	4552	cmd.exe	85
PID 4552 wrote to memory of 2964	4552	cmd.exe	85
PID 4552 wrote to memory of 2964	4552	cmd.exe	85
PID 4552 wrote to memory of 3280	4552	cmd.exe	87
PID 4552 wrote to memory of 3280	4552	cmd.exe	87
PID 4552 wrote to memory of 3280	4552	cmd.exe	87
PID 4552 wrote to memory of 1744	4552	cmd.exe	89
PID 4552 wrote to memory of 1744	4552	cmd.exe	89
PID 4552 wrote to memory of 1744	4552	cmd.exe	89
PID 4100 wrote to memory of 4276	4100	SYS.exe	90
PID 4100 wrote to memory of 4276	4100	SYS.exe	90
PID 4100 wrote to memory of 4276	4100	SYS.exe	90
PID 4276 wrote to memory of 4468	4276	cmd.exe	92
PID 4276 wrote to memory of 4468	4276	cmd.exe	92
PID 4276 wrote to memory of 4468	4276	cmd.exe	92
PID 4276 wrote to memory of 2484	4276	cmd.exe	93
PID 4276 wrote to memory of 2484	4276	cmd.exe	93
PID 4276 wrote to memory of 2484	4276	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\SYS.exe
"C:\Users\Admin\AppData\Local\Temp\SYS.exe"
1⤵
- Drops desktop.ini file(s)
- System Location Discovery: System Language Discovery
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4100
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Wi-Fi Discovery
  - Suspicious use of WriteProcessMemory
  PID:4552
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2964
- - C:\Windows\SysWOW64\netsh.exe
    netsh wlan show profile
    3⤵
    - Event Triggered Execution: Netsh Helper DLL
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Wi-Fi Discovery
    PID:3280
- - C:\Windows\SysWOW64\findstr.exe
    findstr All
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1744
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4276
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4468
- - C:\Windows\SysWOW64\netsh.exe
    netsh wlan show networks mode=bssid
    3⤵
    - Event Triggered Execution: Netsh Helper DLL
    - System Location Discovery: System Language Discovery
    PID:2484

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Privilege Escalation

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Browser Information Discovery

Query Registry

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Wi-Fi Discovery

1

T1016.002

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\26dc58e851319e8174f85acd1eec6a4b\msgid.dat

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
C:\Users\Admin\AppData\Local\a77ad8e141853a696cf469fe9d86fd45\Admin@OZMCVSQS_en-US\Browsers\Firefox\Bookmarks.txt

Filesize
105B

MD5
2e9d094dda5cdc3ce6519f75943a4ff4

SHA1
5d989b4ac8b699781681fe75ed9ef98191a5096c

SHA256
c84c98bbf5e0ef9c8d0708b5d60c5bb656b7d6be5135d7f7a8d25557e08cf142

SHA512
d1f7eed00959e902bdb2125b91721460d3ff99f3bdfc1f2a343d4f58e8d4e5e5a06c0c6cdc0379211c94510f7c00d7a8b34fa7d0ca0c3d54cbbe878f1e9812b7

Download Submit
C:\Users\Admin\AppData\Local\a77ad8e141853a696cf469fe9d86fd45\Admin@OZMCVSQS_en-US\System\Process.txt

Filesize
4KB

MD5
d83da7c1288074e6d49b9ee6855f12df

SHA1
bd7d09edd69003bf06c29401b5897d5ff4268158

SHA256
08f401af2ad98141a1376e28191cbfa4bed0046d0403f7709f97c556f34dfca5

SHA512
15eb924fc0ca51d7c627d84cbc2d5236202fdc08e308120ffc0189b06e4845b91eac7f447ada23233fb57e07ca0cd4d8920bc4f90f539ac746e6ba7d2f2e8684

Download Submit
memory/4100-127-0x0000000074FF0000-0x00000000757A0000-memory.dmp

Filesize
7.7MB

Download
memory/4100-3-0x0000000005800000-0x0000000005866000-memory.dmp

Filesize
408KB

Download
memory/4100-104-0x0000000074FFE000-0x0000000074FFF000-memory.dmp

Filesize
4KB

Download
memory/4100-0-0x0000000074FFE000-0x0000000074FFF000-memory.dmp

Filesize
4KB

Download
memory/4100-2-0x0000000074FF0000-0x00000000757A0000-memory.dmp

Filesize
7.7MB

Download
memory/4100-145-0x0000000074FF0000-0x00000000757A0000-memory.dmp

Filesize
7.7MB

Download
memory/4100-147-0x00000000063A0000-0x0000000006432000-memory.dmp

Filesize
584KB

Download
memory/4100-148-0x00000000069F0000-0x0000000006F94000-memory.dmp

Filesize
5.6MB

Download
memory/4100-152-0x0000000006480000-0x000000000648A000-memory.dmp

Filesize
40KB

Download
memory/4100-1-0x0000000000E10000-0x0000000000E4E000-memory.dmp

Filesize
248KB

Download
memory/4100-158-0x0000000074FF0000-0x00000000757A0000-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