asyncrat | aa6d77b243f9397fc5ab618f515a9dc82358c93d94cc270bd9d4f98910ee4da5

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
07-10-2024 11:54

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General

Target

Bltools 2.9.1[PRO]/Bltools 2.9.1[PRO]/BLTools v2.9.1.exe
Size

3.5MB
MD5

8d90b06ac8babfeaccde7433b1248669
SHA1

515b3b688b1d69d7b3f97704dffabf568415bdf1
SHA256

80eb6a5b248c61b859c04e60af28a2689e9c86546f3a3ec492066a198087f3d9
SHA512

ede247553ed0ee3d1da449d6184d81e61873da12aeebb9e1be1d6dc9bad5c05a37e32d322164d94d45628a7d5a6d5bd044b25c70a8ada2c146a5c0039f2a586e
SSDEEP

98304:3z7+TEjqbFZN2l9OqOj/VCB1CRSHgmYrrwCYM:3uTeqbzN69OqOjmURSAmYp

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/bot7044437613:AAEXeS1SKGTrEjQ8F-7vSegWo8OLABeJY5k/sendMessage?chat_id=6052812018

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
behavioral3/files/0x000c000000023b9d-14.dat	family_stormkitty
behavioral3/memory/1588-24-0x00000000006C0000-0x00000000006F2000-memory.dmp	family_stormkitty

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral3/files/0x000c000000023b9d-14.dat	family_asyncrat

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	BLTools v2.9.1.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	LET.EXE

Executes dropped EXE 2 IoCs

pid	Process
3996	BLTOOLS V2.9.1[PRO].EXE
1588	LET.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) 9 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Local\1fa751ba57257cbb1f4bc5f53950fad7\Admin@GYHASOLS_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini	LET.EXE
File opened for modification	C:\Users\Admin\AppData\Local\1fa751ba57257cbb1f4bc5f53950fad7\Admin@GYHASOLS_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	LET.EXE
File opened for modification	C:\Users\Admin\AppData\Local\1fa751ba57257cbb1f4bc5f53950fad7\Admin@GYHASOLS_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini	LET.EXE
File created	C:\Users\Admin\AppData\Local\1fa751ba57257cbb1f4bc5f53950fad7\Admin@GYHASOLS_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini	LET.EXE
File created	C:\Users\Admin\AppData\Local\1fa751ba57257cbb1f4bc5f53950fad7\Admin@GYHASOLS_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Camera Roll\desktop.ini	LET.EXE
File created	C:\Users\Admin\AppData\Local\1fa751ba57257cbb1f4bc5f53950fad7\Admin@GYHASOLS_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Saved Pictures\desktop.ini	LET.EXE
File created	C:\Users\Admin\AppData\Local\1fa751ba57257cbb1f4bc5f53950fad7\Admin@GYHASOLS_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini	LET.EXE
File created	C:\Users\Admin\AppData\Local\1fa751ba57257cbb1f4bc5f53950fad7\Admin@GYHASOLS_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	LET.EXE
File opened for modification	C:\Users\Admin\AppData\Local\1fa751ba57257cbb1f4bc5f53950fad7\Admin@GYHASOLS_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini	LET.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
1	icanhazip.com

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

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
3996	BLTOOLS V2.9.1[PRO].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 11 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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	BLTOOLS V2.9.1[PRO].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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	BLTools v2.9.1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	LET.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
2780	cmd.exe
2708	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	LET.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	LET.EXE

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
4376	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE
1588	LET.EXE

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1588	LET.EXE
Token: SeDebugPrivilege	1588	LET.EXE

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1408 wrote to memory of 3996	1408	BLTools v2.9.1.exe	79
PID 1408 wrote to memory of 3996	1408	BLTools v2.9.1.exe	79
PID 1408 wrote to memory of 3996	1408	BLTools v2.9.1.exe	79
PID 1408 wrote to memory of 1588	1408	BLTools v2.9.1.exe	80
PID 1408 wrote to memory of 1588	1408	BLTools v2.9.1.exe	80
PID 1408 wrote to memory of 1588	1408	BLTools v2.9.1.exe	80
PID 1588 wrote to memory of 2780	1588	LET.EXE	82
PID 1588 wrote to memory of 2780	1588	LET.EXE	82
PID 1588 wrote to memory of 2780	1588	LET.EXE	82
PID 2780 wrote to memory of 3824	2780	cmd.exe	84
PID 2780 wrote to memory of 3824	2780	cmd.exe	84
PID 2780 wrote to memory of 3824	2780	cmd.exe	84
PID 2780 wrote to memory of 2708	2780	cmd.exe	85
PID 2780 wrote to memory of 2708	2780	cmd.exe	85
PID 2780 wrote to memory of 2708	2780	cmd.exe	85
PID 2780 wrote to memory of 1436	2780	cmd.exe	86
PID 2780 wrote to memory of 1436	2780	cmd.exe	86
PID 2780 wrote to memory of 1436	2780	cmd.exe	86
PID 1588 wrote to memory of 5024	1588	LET.EXE	87
PID 1588 wrote to memory of 5024	1588	LET.EXE	87
PID 1588 wrote to memory of 5024	1588	LET.EXE	87
PID 5024 wrote to memory of 3732	5024	cmd.exe	89
PID 5024 wrote to memory of 3732	5024	cmd.exe	89
PID 5024 wrote to memory of 3732	5024	cmd.exe	89
PID 5024 wrote to memory of 2960	5024	cmd.exe	90
PID 5024 wrote to memory of 2960	5024	cmd.exe	90
PID 5024 wrote to memory of 2960	5024	cmd.exe	90
PID 1588 wrote to memory of 4376	1588	LET.EXE	91
PID 1588 wrote to memory of 4376	1588	LET.EXE	91
PID 1588 wrote to memory of 4376	1588	LET.EXE	91

C:\Users\Admin\AppData\Local\Temp\Bltools 2.9.1[PRO]\Bltools 2.9.1[PRO]\BLTools v2.9.1.exe
"C:\Users\Admin\AppData\Local\Temp\Bltools 2.9.1[PRO]\Bltools 2.9.1[PRO]\BLTools v2.9.1.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1408
- C:\Users\Admin\AppData\Local\Temp\BLTOOLS V2.9.1[PRO].EXE
  "C:\Users\Admin\AppData\Local\Temp\BLTOOLS V2.9.1[PRO].EXE"
  2⤵
  - Executes dropped EXE
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:3996
- C:\Users\Admin\AppData\Local\Temp\LET.EXE
  "C:\Users\Admin\AppData\Local\Temp\LET.EXE"
  2⤵
  - Checks computer location settings
  - 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:1588
- - 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:2780
  - - C:\Windows\SysWOW64\chcp.com
      chcp 65001
      4⤵
      System Location Discovery: System Language Discovery
      PID:3824
  - - 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:2708
  - - C:\Windows\SysWOW64\findstr.exe
      findstr All
      4⤵
      System Location Discovery: System Language Discovery
      PID:1436
- - 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:5024
  - - C:\Windows\SysWOW64\chcp.com
      chcp 65001
      4⤵
      System Location Discovery: System Language Discovery
      PID:3732
  - - 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:2960
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /sc ONLOGON /RL HIGHEST /tn "Chrome Update" /tr "C:\Users\Admin\AppData\Local\Temp\LET.EXE"
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4376

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\1fa751ba57257cbb1f4bc5f53950fad7\Admin@GYHASOLS_en-US\Browsers\Firefox\Bookmarks.txt

Filesize
105B

MD5
2e9d094dda5cdc3ce6519f75943a4ff4

SHA1
5d989b4ac8b699781681fe75ed9ef98191a5096c

SHA256
c84c98bbf5e0ef9c8d0708b5d60c5bb656b7d6be5135d7f7a8d25557e08cf142

SHA512
d1f7eed00959e902bdb2125b91721460d3ff99f3bdfc1f2a343d4f58e8d4e5e5a06c0c6cdc0379211c94510f7c00d7a8b34fa7d0ca0c3d54cbbe878f1e9812b7

Download Submit
C:\Users\Admin\AppData\Local\1fa751ba57257cbb1f4bc5f53950fad7\Admin@GYHASOLS_en-US\System\Process.txt

Filesize
4KB

MD5
c88c1d7a227a2694757b19751d8dc623

SHA1
4f5dbe0c903e7a6519e6457d759e4cf2eb40d51b

SHA256
eea3b086090500cbf87f91fc8272660372cb4106dcbf237d81a348e3807c05ec

SHA512
5ba1255782534521fc8101ff823047ab46ec4e408f51b8d0794e9f5e5b959af14281303608189b826d036f16c06a457b7162e59d7266682a0f89523a4368f48e

Download Submit
C:\Users\Admin\AppData\Local\Temp\BLTOOLS V2.9.1[PRO].EXE

Filesize
3.2MB

MD5
025d637741b1b326ded2e99e6b54ed77

SHA1
5fb6a288559f54aeb42203cf5e44a072c74f942f

SHA256
d68b3cdca20f0b871a653a3203e4292846e766b45fb989856a2de0fb9e0c4860

SHA512
720f4f03febbe7fdd661c14349680f6511a69487b0bdf5cd47ab4594b1fad49edeb0bde8e287272d84e21efc916ba91ca71bfa2632eba76e379e07815163d26b

Download Submit
C:\Users\Admin\AppData\Local\Temp\LET.EXE

Filesize
175KB

MD5
c7235b3be7873e0743aba6235cd3d677

SHA1
2481321813caff4ded19135c86301f899fb19f66

SHA256
4902c56dfa5b513df7c00f8fe5df90dcc46a03f194dca424ebbf6f03e7904486

SHA512
7310beb111ca489fd6348d40cea921d8854d99858cb2b9dc7d8211009a8c958374832f585f2cb25962e7ed3a453ca11102b7fb47be0eff8d2a7bc2b564928860

Download Submit
C:\Users\Admin\AppData\Local\c6ed46d29c5ac1be065e7eb6266671e2\msgid.dat

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
memory/1588-30-0x0000000005CE0000-0x0000000006284000-memory.dmp

Filesize
5.6MB

Download
memory/1588-179-0x0000000005CB0000-0x0000000005CBA000-memory.dmp

Filesize
40KB

Download
memory/1588-27-0x00000000737B0000-0x0000000073F60000-memory.dmp

Filesize
7.7MB

Download
memory/1588-186-0x00000000737B0000-0x0000000073F60000-memory.dmp

Filesize
7.7MB

Download
memory/1588-185-0x00000000072B0000-0x00000000072BA000-memory.dmp

Filesize
40KB

Download
memory/1588-25-0x00000000737B0000-0x0000000073F60000-memory.dmp

Filesize
7.7MB

Download
memory/1588-31-0x0000000005910000-0x00000000059A2000-memory.dmp

Filesize
584KB

Download
memory/1588-24-0x00000000006C0000-0x00000000006F2000-memory.dmp

Filesize
200KB

Download
memory/1588-26-0x0000000004F80000-0x0000000004FE6000-memory.dmp

Filesize
408KB

Download
memory/1588-176-0x00000000737B0000-0x0000000073F60000-memory.dmp

Filesize
7.7MB

Download
memory/1588-172-0x00000000737B0000-0x0000000073F60000-memory.dmp

Filesize
7.7MB

Download
memory/1588-173-0x00000000737B0000-0x0000000073F60000-memory.dmp

Filesize
7.7MB

Download
memory/3996-23-0x00000000006A0000-0x0000000000DF0000-memory.dmp

Filesize
7.3MB

Download
memory/3996-144-0x00000000737B0000-0x0000000073F60000-memory.dmp

Filesize
7.7MB

Download
memory/3996-19-0x00000000737BE000-0x00000000737BF000-memory.dmp

Filesize
4KB

Download
memory/3996-29-0x00000000737B0000-0x0000000073F60000-memory.dmp

Filesize
7.7MB

Download
memory/3996-28-0x00000000030B0000-0x00000000030B1000-memory.dmp

Filesize
4KB

Download