asyncrat | 20f0f8622c856bf79b4b4b740c4dbe961a04dc7a290d9375093eb0e7c01c9c6f

Analysis

max time kernel
149s
max time network
122s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
13-10-2024 19:35

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General

Target

20f0f8622c856bf79b4b4b740c4dbe961a04dc7a290d9375093eb0e7c01c9c6f.exe
Size

741KB
MD5

49a235f58aa7c4ee39535a7f81e67bea
SHA1

39a0ff2c70e01ec04d4ea45b19ccad37615446d9
SHA256

20f0f8622c856bf79b4b4b740c4dbe961a04dc7a290d9375093eb0e7c01c9c6f
SHA512

d53fe2cd7e49a844a8dfd09f8dd673e85fd50670b36d2668dffa5449d3e49a6ae369ddf1082097bd3a93d8a1b214a2028b0a2ea3d06c758690a25b16ae5578e3
SSDEEP

12288:Z0nyfXuIBDtfu3d34SafixO5Sizm4qT9c4jF0ju+mZMk:Wny/f9utISauqU9cU4u+uZ

Score

10^/10

asyncrat stormkitty default discovery persistence privilege_escalation rat spyware stealer

Malware Config

Extracted

Family

asyncrat

Botnet

Default

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

https://api.telegram.org/bot7386776614:AAE49J6grELkpFfFaKkddIuaU586DDiQPYY/sendMessage?chat_id=5373795817

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

StormKitty payload 2 IoCs

resource	yara_rule
behavioral1/files/0x0008000000016d3a-7.dat	family_stormkitty
behavioral1/memory/2624-20-0x0000000000190000-0x00000000001C2000-memory.dmp	family_stormkitty

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x0008000000016d3a-7.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2624	Server.exe

Loads dropped DLL 4 IoCs

pid	Process
1996	20f0f8622c856bf79b4b4b740c4dbe961a04dc7a290d9375093eb0e7c01c9c6f.exe
1996	20f0f8622c856bf79b4b4b740c4dbe961a04dc7a290d9375093eb0e7c01c9c6f.exe
1996	20f0f8622c856bf79b4b4b740c4dbe961a04dc7a290d9375093eb0e7c01c9c6f.exe
1996	20f0f8622c856bf79b4b4b740c4dbe961a04dc7a290d9375093eb0e7c01c9c6f.exe

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 opened for modification	C:\Users\Admin\AppData\Local\05039a44b73f973d6341ee5ab9aaeb9b\Admin@CCJBVTGQ_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini	Server.exe
File created	C:\Users\Admin\AppData\Local\05039a44b73f973d6341ee5ab9aaeb9b\Admin@CCJBVTGQ_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	Server.exe
File opened for modification	C:\Users\Admin\AppData\Local\05039a44b73f973d6341ee5ab9aaeb9b\Admin@CCJBVTGQ_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	Server.exe
File created	C:\Users\Admin\AppData\Local\05039a44b73f973d6341ee5ab9aaeb9b\Admin@CCJBVTGQ_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	Server.exe
File opened for modification	C:\Users\Admin\AppData\Local\05039a44b73f973d6341ee5ab9aaeb9b\Admin@CCJBVTGQ_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	Server.exe
File created	C:\Users\Admin\AppData\Local\05039a44b73f973d6341ee5ab9aaeb9b\Admin@CCJBVTGQ_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini	Server.exe
File opened for modification	C:\Users\Admin\AppData\Local\05039a44b73f973d6341ee5ab9aaeb9b\Admin@CCJBVTGQ_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini	Server.exe
File created	C:\Users\Admin\AppData\Local\05039a44b73f973d6341ee5ab9aaeb9b\Admin@CCJBVTGQ_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini	Server.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
4	icanhazip.com

Looks up geolocation information via web service
Uses a legitimate geolocation service to find the infected system's geolocation info.

Drops file in Program Files directory 7 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\New	20f0f8622c856bf79b4b4b740c4dbe961a04dc7a290d9375093eb0e7c01c9c6f.exe
File created	C:\Program Files (x86)\New\__tmp_rar_sfx_access_check_259446963	20f0f8622c856bf79b4b4b740c4dbe961a04dc7a290d9375093eb0e7c01c9c6f.exe
File created	C:\Program Files (x86)\New\p.png	20f0f8622c856bf79b4b4b740c4dbe961a04dc7a290d9375093eb0e7c01c9c6f.exe
File opened for modification	C:\Program Files (x86)\New\p.png	20f0f8622c856bf79b4b4b740c4dbe961a04dc7a290d9375093eb0e7c01c9c6f.exe
File created	C:\Program Files (x86)\New\Server.exe	20f0f8622c856bf79b4b4b740c4dbe961a04dc7a290d9375093eb0e7c01c9c6f.exe
File opened for modification	C:\Program Files (x86)\New\Server.exe	20f0f8622c856bf79b4b4b740c4dbe961a04dc7a290d9375093eb0e7c01c9c6f.exe
File opened for modification	C:\Program Files (x86)\New\p.png	DllHost.exe

Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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 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
Key queried	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe

System Location Discovery: System Language Discovery 1 TTPs 10 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	DllHost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Server.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	20f0f8622c856bf79b4b4b740c4dbe961a04dc7a290d9375093eb0e7c01c9c6f.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	findstr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	chcp.com
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.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
1852	cmd.exe
2876	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	Server.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	Server.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2624	Server.exe
2624	Server.exe
2624	Server.exe
2624	Server.exe
2624	Server.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2624	Server.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
832	DllHost.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
832	DllHost.exe
832	DllHost.exe

Suspicious use of WriteProcessMemory 56 IoCs

description	pid	Process	procid_target
PID 1996 wrote to memory of 2624	1996	20f0f8622c856bf79b4b4b740c4dbe961a04dc7a290d9375093eb0e7c01c9c6f.exe	32
PID 1996 wrote to memory of 2624	1996	20f0f8622c856bf79b4b4b740c4dbe961a04dc7a290d9375093eb0e7c01c9c6f.exe	32
PID 1996 wrote to memory of 2624	1996	20f0f8622c856bf79b4b4b740c4dbe961a04dc7a290d9375093eb0e7c01c9c6f.exe	32
PID 1996 wrote to memory of 2624	1996	20f0f8622c856bf79b4b4b740c4dbe961a04dc7a290d9375093eb0e7c01c9c6f.exe	32
PID 1996 wrote to memory of 2624	1996	20f0f8622c856bf79b4b4b740c4dbe961a04dc7a290d9375093eb0e7c01c9c6f.exe	32
PID 1996 wrote to memory of 2624	1996	20f0f8622c856bf79b4b4b740c4dbe961a04dc7a290d9375093eb0e7c01c9c6f.exe	32
PID 1996 wrote to memory of 2624	1996	20f0f8622c856bf79b4b4b740c4dbe961a04dc7a290d9375093eb0e7c01c9c6f.exe	32
PID 2624 wrote to memory of 1852	2624	Server.exe	34
PID 2624 wrote to memory of 1852	2624	Server.exe	34
PID 2624 wrote to memory of 1852	2624	Server.exe	34
PID 2624 wrote to memory of 1852	2624	Server.exe	34
PID 2624 wrote to memory of 1852	2624	Server.exe	34
PID 2624 wrote to memory of 1852	2624	Server.exe	34
PID 2624 wrote to memory of 1852	2624	Server.exe	34
PID 1852 wrote to memory of 2712	1852	cmd.exe	36
PID 1852 wrote to memory of 2712	1852	cmd.exe	36
PID 1852 wrote to memory of 2712	1852	cmd.exe	36
PID 1852 wrote to memory of 2712	1852	cmd.exe	36
PID 1852 wrote to memory of 2712	1852	cmd.exe	36
PID 1852 wrote to memory of 2712	1852	cmd.exe	36
PID 1852 wrote to memory of 2712	1852	cmd.exe	36
PID 1852 wrote to memory of 2876	1852	cmd.exe	37
PID 1852 wrote to memory of 2876	1852	cmd.exe	37
PID 1852 wrote to memory of 2876	1852	cmd.exe	37
PID 1852 wrote to memory of 2876	1852	cmd.exe	37
PID 1852 wrote to memory of 2876	1852	cmd.exe	37
PID 1852 wrote to memory of 2876	1852	cmd.exe	37
PID 1852 wrote to memory of 2876	1852	cmd.exe	37
PID 1852 wrote to memory of 2760	1852	cmd.exe	38
PID 1852 wrote to memory of 2760	1852	cmd.exe	38
PID 1852 wrote to memory of 2760	1852	cmd.exe	38
PID 1852 wrote to memory of 2760	1852	cmd.exe	38
PID 1852 wrote to memory of 2760	1852	cmd.exe	38
PID 1852 wrote to memory of 2760	1852	cmd.exe	38
PID 1852 wrote to memory of 2760	1852	cmd.exe	38
PID 2624 wrote to memory of 2888	2624	Server.exe	39
PID 2624 wrote to memory of 2888	2624	Server.exe	39
PID 2624 wrote to memory of 2888	2624	Server.exe	39
PID 2624 wrote to memory of 2888	2624	Server.exe	39
PID 2624 wrote to memory of 2888	2624	Server.exe	39
PID 2624 wrote to memory of 2888	2624	Server.exe	39
PID 2624 wrote to memory of 2888	2624	Server.exe	39
PID 2888 wrote to memory of 2232	2888	cmd.exe	41
PID 2888 wrote to memory of 2232	2888	cmd.exe	41
PID 2888 wrote to memory of 2232	2888	cmd.exe	41
PID 2888 wrote to memory of 2232	2888	cmd.exe	41
PID 2888 wrote to memory of 2232	2888	cmd.exe	41
PID 2888 wrote to memory of 2232	2888	cmd.exe	41
PID 2888 wrote to memory of 2232	2888	cmd.exe	41
PID 2888 wrote to memory of 2220	2888	cmd.exe	42
PID 2888 wrote to memory of 2220	2888	cmd.exe	42
PID 2888 wrote to memory of 2220	2888	cmd.exe	42
PID 2888 wrote to memory of 2220	2888	cmd.exe	42
PID 2888 wrote to memory of 2220	2888	cmd.exe	42
PID 2888 wrote to memory of 2220	2888	cmd.exe	42
PID 2888 wrote to memory of 2220	2888	cmd.exe	42

C:\Users\Admin\AppData\Local\Temp\20f0f8622c856bf79b4b4b740c4dbe961a04dc7a290d9375093eb0e7c01c9c6f.exe
"C:\Users\Admin\AppData\Local\Temp\20f0f8622c856bf79b4b4b740c4dbe961a04dc7a290d9375093eb0e7c01c9c6f.exe"
1⤵
- Loads dropped DLL
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1996
- C:\Program Files (x86)\New\Server.exe
  "C:\Program Files (x86)\New\Server.exe"
  2⤵
  - Executes dropped EXE
  - 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:2624
- - C:\Windows\SysWOW64\cmd.exe
    "cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Wi-Fi Discovery
    - Suspicious use of WriteProcessMemory
    PID:1852
  - - C:\Windows\SysWOW64\chcp.com
      chcp 65001
      4⤵
      System Location Discovery: System Language Discovery
      PID:2712
  - - C:\Windows\SysWOW64\netsh.exe
      netsh wlan show profile
      4⤵
      Event Triggered Execution: Netsh Helper DLL
      System Location Discovery: System Language Discovery
      System Network Configuration Discovery: Wi-Fi Discovery
      PID:2876
  - - C:\Windows\SysWOW64\findstr.exe
      findstr All
      4⤵
      System Location Discovery: System Language Discovery
      PID:2760
- - C:\Windows\SysWOW64\cmd.exe
    "cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2888
  - - C:\Windows\SysWOW64\chcp.com
      chcp 65001
      4⤵
      System Location Discovery: System Language Discovery
      PID:2232
  - - C:\Windows\SysWOW64\netsh.exe
      netsh wlan show networks mode=bssid
      4⤵
      Event Triggered Execution: Netsh Helper DLL
      System Location Discovery: System Language Discovery
      PID:2220

C:\Windows\SysWOW64\DllHost.exe
C:\Windows\SysWOW64\DllHost.exe /Processid:{76D0CB12-7604-4048-B83C-1005C7DDC503}
1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
PID:832

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Privilege Escalation

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Browser Information Discovery

T1217

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Wi-Fi Discovery

T1016.002

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Program Files (x86)\New\p.png

Filesize
210KB

MD5
1b592e8ab56c71b5f43a9a75b79548d1

SHA1
5ad0d0ee8e054574cb1cd1c6b510a54f834d4781

SHA256
8e7d3804dca3f7e3e0d604fde1d5038bf9bb1667de246e633eb2ea0fc4c3f8a4

SHA512
7769001a2daade7b7e8a20cfec6494ead9072b98d3dbf3cd2e2ea90752ae0e7991041661f96513a9b6ef3bfecb6142ef78e82fcbab2ecf53e6f3aee1fc695f6a

Download Submit
C:\Users\Admin\AppData\Local\19b99f596f4d554fe8a883b639e4030d\msgid.dat

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
\Program Files (x86)\New\Server.exe

Filesize
175KB

MD5
f6de529f44ce715ca2229e72f80bb2c9

SHA1
b8fdc1415fdf3b2cf64c018f1f53bec4affdafca

SHA256
f6a225855d7af90a9d3cfe74eeb5735dccbcab1b6cc6d6941a91af6be5b19da8

SHA512
28a109d54ff5ecbb232351cc59c46dbf07c6825242c3a49b6046e3ae23994171d89157f8167b6e11418cb108c7c3f1dab4e9edbc088d8699cff5e7511ac9d277

Download Submit
memory/832-5-0x0000000000150000-0x0000000000152000-memory.dmp

Filesize
8KB

Download
memory/1996-4-0x0000000002000000-0x0000000002002000-memory.dmp

Filesize
8KB

Download
memory/2624-20-0x0000000000190000-0x00000000001C2000-memory.dmp

Filesize
200KB

Download