asyncrat | 5fbd4e2c42e19e7ee561183ca6b2ded2f8049a890951704c799e8b4a016ab817

General

Target

BotKiller.exe
Size

6KB
MD5

10d199b2efdb69ed343f5cd4044b7def
SHA1

1f218983db04d9b7b31a67aeead5a94ca5d3dc80
SHA256

5fbd4e2c42e19e7ee561183ca6b2ded2f8049a890951704c799e8b4a016ab817
SHA512

682feb271c12a847b69f1ac92ad7d5cad18b145b64af83dbe7fd0f6282be8bf6091323ca16bc509f789a68e74e17eb1484fce907f9a0562237b40572e0e8852c
SSDEEP

96:1SJmM+BVOGjYKyhp+Aloz0yD/TB2uJW9wzNt:1smHOhpdXyLEuJIS

Score

10^/10

asyncrat stealerium default collection discovery persistence privilege_escalation rat spyware stealer

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

technical-southwest.gl.at.ply.gg:58694

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
Stealerium
An open source info stealer written in C# first seen in May 2022.
stealer stealerium
Stealerium family
stealerium

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
behavioral1/files/0x000a000000023bef-7.dat	family_asyncrat

Downloads MZ/PE file

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

BotKiller.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	BotKiller.exe

Executes dropped EXE 1 IoCs

Processes:

Loader.exe

pid	Process
2284	Loader.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

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

Processes:

Loader.exe

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Loader.exe
Key opened	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Loader.exe
Key opened	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Loader.exe

Looks up external IP address via web service 2 IoCs

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

Processes:

flow	ioc
63	ip-api.com
61	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
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

Processes:

netsh.exenetsh.exe

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

Processes:

cmd.exenetsh.exe

pid	Process
736	cmd.exe
4672	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

Processes:

Loader.exe

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

Suspicious behavior: EnumeratesProcesses 43 IoCs

Processes:

BotKiller.exeLoader.exe

pid	Process
2808	BotKiller.exe
2808	BotKiller.exe
2808	BotKiller.exe
2808	BotKiller.exe
2808	BotKiller.exe
2808	BotKiller.exe
2808	BotKiller.exe
2808	BotKiller.exe
2808	BotKiller.exe
2808	BotKiller.exe
2808	BotKiller.exe
2808	BotKiller.exe
2808	BotKiller.exe
2808	BotKiller.exe
2808	BotKiller.exe
2808	BotKiller.exe
2808	BotKiller.exe
2808	BotKiller.exe
2808	BotKiller.exe
2808	BotKiller.exe
2808	BotKiller.exe
2808	BotKiller.exe
2808	BotKiller.exe
2284	Loader.exe
2284	Loader.exe
2284	Loader.exe
2284	Loader.exe
2284	Loader.exe
2284	Loader.exe
2284	Loader.exe
2284	Loader.exe
2284	Loader.exe
2284	Loader.exe
2284	Loader.exe
2284	Loader.exe
2284	Loader.exe
2284	Loader.exe
2284	Loader.exe
2284	Loader.exe
2284	Loader.exe
2284	Loader.exe
2284	Loader.exe
2284	Loader.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

BotKiller.exeLoader.exe

description	pid	Process
Token: SeDebugPrivilege	2808	BotKiller.exe
Token: SeDebugPrivilege	2284	Loader.exe

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

BotKiller.exeLoader.execmd.execmd.exe

description	pid	Process	procid_target
PID 2808 wrote to memory of 2284	2808	BotKiller.exe	84
PID 2808 wrote to memory of 2284	2808	BotKiller.exe	84
PID 2284 wrote to memory of 736	2284	Loader.exe	108
PID 2284 wrote to memory of 736	2284	Loader.exe	108
PID 736 wrote to memory of 1220	736	cmd.exe	110
PID 736 wrote to memory of 1220	736	cmd.exe	110
PID 736 wrote to memory of 4672	736	cmd.exe	111
PID 736 wrote to memory of 4672	736	cmd.exe	111
PID 736 wrote to memory of 4816	736	cmd.exe	112
PID 736 wrote to memory of 4816	736	cmd.exe	112
PID 2284 wrote to memory of 3756	2284	Loader.exe	113
PID 2284 wrote to memory of 3756	2284	Loader.exe	113
PID 3756 wrote to memory of 3924	3756	cmd.exe	115
PID 3756 wrote to memory of 3924	3756	cmd.exe	115
PID 3756 wrote to memory of 2276	3756	cmd.exe	116
PID 3756 wrote to memory of 2276	3756	cmd.exe	116

outlook_office_path 1 IoCs

Processes:

Loader.exe

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Loader.exe

outlook_win_path 1 IoCs

Processes:

Loader.exe

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Loader.exe

C:\Users\Admin\AppData\Local\Temp\BotKiller.exe
"C:\Users\Admin\AppData\Local\Temp\BotKiller.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2808
- C:\Users\Admin\AppData\Local\Temp\Loader.exe
  "C:\Users\Admin\AppData\Local\Temp\Loader.exe"
  2⤵
  - Executes dropped EXE
  - Accesses Microsoft Outlook profiles
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  - outlook_office_path
  - outlook_win_path
  PID:2284
- - C:\Windows\SYSTEM32\cmd.exe
    "cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
    3⤵
    - System Network Configuration Discovery: Wi-Fi Discovery
    - Suspicious use of WriteProcessMemory
    PID:736
  - - C:\Windows\system32\chcp.com
      chcp 65001
      4⤵
      PID:1220
  - - C:\Windows\system32\netsh.exe
      netsh wlan show profile
      4⤵
      Event Triggered Execution: Netsh Helper DLL
      System Network Configuration Discovery: Wi-Fi Discovery
      PID:4672
  - - C:\Windows\system32\findstr.exe
      findstr All
      4⤵
      PID:4816
- - C:\Windows\SYSTEM32\cmd.exe
    "cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3756
  - - C:\Windows\system32\chcp.com
      chcp 65001
      4⤵
      PID:3924
  - - C:\Windows\system32\netsh.exe
      netsh wlan show networks mode=bssid
      4⤵
      Event Triggered Execution: Netsh Helper DLL
      PID:2276

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

3

T1082

System Network Configuration Discovery

1

T1016

Wi-Fi Discovery

1

T1016.002

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\376206f00732ea5b0a1b10e2cab412e2\Admin@KBKWGEBK_en-US\Browsers\Mozilla\Firefox\Bookmarks.txt

Filesize
105B

MD5
2e9d094dda5cdc3ce6519f75943a4ff4

SHA1
5d989b4ac8b699781681fe75ed9ef98191a5096c

SHA256
c84c98bbf5e0ef9c8d0708b5d60c5bb656b7d6be5135d7f7a8d25557e08cf142

SHA512
d1f7eed00959e902bdb2125b91721460d3ff99f3bdfc1f2a343d4f58e8d4e5e5a06c0c6cdc0379211c94510f7c00d7a8b34fa7d0ca0c3d54cbbe878f1e9812b7

Download Submit
C:\Users\Admin\AppData\Local\376206f00732ea5b0a1b10e2cab412e2\Admin@KBKWGEBK_en-US\System\Process.txt

Filesize
4KB

MD5
958b89c59997d635c5e6e108479726fa

SHA1
896adabde2dfff6ecb0fd10a91c654ca36a70443

SHA256
f6fd573db9b27dbe6224d92dfcae8097b096f9c869103c419906124f75ba6930

SHA512
c9cda9e2ca546a8ff44656779df62bf4eb482e9a58cd7415a2f6c62faa7ae2f5735cebea4ec61ff4d9823f74a6024208baef962381b649c35d647e31d59f50f4

Download Submit
C:\Users\Admin\AppData\Local\Temp\Loader.exe

Filesize
63KB

MD5
56c640c4191b4b95ba344032afd14e77

SHA1
c93a0fd32b46718ca3bc7d1c78ae6236b88ef3c9

SHA256
ebd4b1ab90350e2f13d46f2a356d5a637d5bec704cf3af211c43a89cb11dd142

SHA512
617512f96443b7cc9cc315d2eb0322d8b359218d459e80821563336b67ac263f1da9b00c75bde73320d6540572552c47b436c683c862f19b5ed470273001e63e

Download Submit
memory/2284-28-0x000000001CF80000-0x000000001D108000-memory.dmp

Filesize
1.5MB

Download
memory/2284-25-0x00000000011E0000-0x0000000001256000-memory.dmp

Filesize
472KB

Download
memory/2284-174-0x000000001BB90000-0x000000001BC0A000-memory.dmp

Filesize
488KB

Download
memory/2284-17-0x00007FFE6DBB0000-0x00007FFE6E671000-memory.dmp

Filesize
10.8MB

Download
memory/2284-18-0x00007FFE6DBB0000-0x00007FFE6E671000-memory.dmp

Filesize
10.8MB

Download
memory/2284-19-0x00007FFE6DBB0000-0x00007FFE6E671000-memory.dmp

Filesize
10.8MB

Download
memory/2284-22-0x00007FFE6DBB0000-0x00007FFE6E671000-memory.dmp

Filesize
10.8MB

Download
memory/2284-23-0x00007FFE6DBB0000-0x00007FFE6E671000-memory.dmp

Filesize
10.8MB

Download
memory/2284-24-0x00007FFE6DBB0000-0x00007FFE6E671000-memory.dmp

Filesize
10.8MB

Download
memory/2284-15-0x0000000000770000-0x0000000000786000-memory.dmp

Filesize
88KB

Download
memory/2284-26-0x0000000001160000-0x0000000001194000-memory.dmp

Filesize
208KB

Download
memory/2284-27-0x00000000011B0000-0x00000000011CE000-memory.dmp

Filesize
120KB

Download
memory/2284-33-0x0000000002970000-0x000000000297A000-memory.dmp

Filesize
40KB

Download
memory/2808-0-0x000001A82BE00000-0x000001A82BE06000-memory.dmp

Filesize
24KB

Download
memory/2808-2-0x00007FFE6DBB0000-0x00007FFE6E671000-memory.dmp

Filesize
10.8MB

Download
memory/2808-1-0x00007FFE6DBB3000-0x00007FFE6DBB5000-memory.dmp

Filesize
8KB

Download
memory/2808-16-0x00007FFE6DBB0000-0x00007FFE6E671000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads