asyncrat | 62ab616a986ed8d7725c5c37122c385b7ad30b9e02d659e950fa099c9b8d9ed3

General

Target

Zexo.exe
Size

63KB
MD5

fe21311e262630af1a54520f55ca8c69
SHA1

1d595196ae495436868b9b6d5f0d17d04a5ff8ef
SHA256

62ab616a986ed8d7725c5c37122c385b7ad30b9e02d659e950fa099c9b8d9ed3
SHA512

c89d654df3ab13762f1cf529d5526da7716bc61c6634d3255a0f01a4708a2701513cd45c0079f95d089df127f73386a83b0a19b1a09b5b2b28d0cb43946ce97f
SSDEEP

768:jnuguX1wbgyX78dIC8A+XkuazcBRL5JTk1+T4KSBGHmDbD/ph0oXpdM7nNqSuEdP:rvCCPTDdSJYUbdh9jMXuEdpqKmY7

Score

10^/10

asyncrat stealerium default collection discovery persistence privilege_escalation rat spyware stealer

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

147.185.221.21:27180

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

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1062200478-553497403-3857448183-1000\Control Panel\International\Geo\Nation	Zexo.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

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1062200478-553497403-3857448183-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Zexo.exe
Key opened	\REGISTRY\USER\S-1-5-21-1062200478-553497403-3857448183-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Zexo.exe
Key opened	\REGISTRY\USER\S-1-5-21-1062200478-553497403-3857448183-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Zexo.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.

flow	ioc
70	icanhazip.com
72	ip-api.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

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

pid	Process
3140	cmd.exe
3092	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	Zexo.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	Zexo.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
5752	schtasks.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
5384	Zexo.exe
5384	Zexo.exe
5384	Zexo.exe
5384	Zexo.exe
5384	Zexo.exe
5384	Zexo.exe
5384	Zexo.exe
5384	Zexo.exe
5384	Zexo.exe
5384	Zexo.exe
5384	Zexo.exe
5384	Zexo.exe
5384	Zexo.exe
5384	Zexo.exe
5384	Zexo.exe
5384	Zexo.exe
5384	Zexo.exe
5384	Zexo.exe
5384	Zexo.exe
5384	Zexo.exe
5384	Zexo.exe
5384	Zexo.exe
5384	Zexo.exe
5384	Zexo.exe
5384	Zexo.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5384	Zexo.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 5384 wrote to memory of 3140	5384	Zexo.exe	108
PID 5384 wrote to memory of 3140	5384	Zexo.exe	108
PID 3140 wrote to memory of 5164	3140	cmd.exe	110
PID 3140 wrote to memory of 5164	3140	cmd.exe	110
PID 3140 wrote to memory of 3092	3140	cmd.exe	111
PID 3140 wrote to memory of 3092	3140	cmd.exe	111
PID 3140 wrote to memory of 2416	3140	cmd.exe	112
PID 3140 wrote to memory of 2416	3140	cmd.exe	112
PID 5384 wrote to memory of 4796	5384	Zexo.exe	113
PID 5384 wrote to memory of 4796	5384	Zexo.exe	113
PID 4796 wrote to memory of 3732	4796	cmd.exe	115
PID 4796 wrote to memory of 3732	4796	cmd.exe	115
PID 4796 wrote to memory of 1696	4796	cmd.exe	116
PID 4796 wrote to memory of 1696	4796	cmd.exe	116
PID 5384 wrote to memory of 2964	5384	Zexo.exe	117
PID 5384 wrote to memory of 2964	5384	Zexo.exe	117
PID 2964 wrote to memory of 5752	2964	cmd.exe	119
PID 2964 wrote to memory of 5752	2964	cmd.exe	119

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1062200478-553497403-3857448183-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Zexo.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1062200478-553497403-3857448183-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Zexo.exe

C:\Users\Admin\AppData\Local\Temp\Zexo.exe
"C:\Users\Admin\AppData\Local\Temp\Zexo.exe"
1⤵
- Checks computer location settings
- 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:5384
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
  2⤵
  - System Network Configuration Discovery: Wi-Fi Discovery
  - Suspicious use of WriteProcessMemory
  PID:3140
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:5164
- - C:\Windows\system32\netsh.exe
    netsh wlan show profile
    3⤵
    - Event Triggered Execution: Netsh Helper DLL
    - System Network Configuration Discovery: Wi-Fi Discovery
    PID:3092
- - C:\Windows\system32\findstr.exe
    findstr All
    3⤵
    PID:2416
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4796
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:3732
- - C:\Windows\system32\netsh.exe
    netsh wlan show networks mode=bssid
    3⤵
    - Event Triggered Execution: Netsh Helper DLL
    PID:1696
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Zexo" /tr '"C:\Users\Admin\AppData\Roaming\Zexo.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2964
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Zexo" /tr '"C:\Users\Admin\AppData\Roaming\Zexo.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:5752

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

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

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Downloads

C:\Users\Admin\AppData\Local\b8d8595bc371e3d614be0a7b7052e1c2\Admin@QQDZFYSF_en-US\System\Process.txt

Filesize
3KB

MD5
44ce5dc7a38288a39349830e8be9a4fd

SHA1
f94a626fdf4d6541209b7cb1e23d2de227338721

SHA256
b90e8693389cd8c5655c0c96ce9fb3dd8ece7e3f15633f192577553a2ad9cb8f

SHA512
eb8b0f4cb4e95645b32903d9669c1f6562c858afc92a8a16d3907da72715d0457f1c4c6c441a6f11365bd2004fd59b034c68971e1cd058ec5c71ee15ce990366

Download Submit
C:\Users\Admin\AppData\Local\b8d8595bc371e3d614be0a7b7052e1c2\Admin@QQDZFYSF_en-US\System\Process.txt

Filesize
4KB

MD5
f277be828b4fef02c49111c6626f3296

SHA1
ae382c39ef0c218677c714c7b95eac77a3dde62e

SHA256
6436ef1d8f40a73e76103da7e2dc2bd991daae5adb11db2d5ad29e2791c2c8bd

SHA512
2bc1bde32213ed5d92c2ba174f4d475c87429e874cd1dfa989b033d177eaca94adc4eea625a47bb21bd166dc5cc5a563eb062699ddeb9b1b34798b54c3ee8f30

Download Submit
memory/5384-12-0x000000001CEA0000-0x000000001D028000-memory.dmp

Filesize
1.5MB

Download
memory/5384-17-0x0000000002EB0000-0x0000000002EBA000-memory.dmp

Filesize
40KB

Download
memory/5384-6-0x00007FF80D4A3000-0x00007FF80D4A5000-memory.dmp

Filesize
8KB

Download
memory/5384-7-0x00007FF80D4A0000-0x00007FF80DF61000-memory.dmp

Filesize
10.8MB

Download
memory/5384-8-0x00007FF80D4A0000-0x00007FF80DF61000-memory.dmp

Filesize
10.8MB

Download
memory/5384-10-0x0000000003080000-0x00000000030B4000-memory.dmp

Filesize
208KB

Download
memory/5384-9-0x000000001C850000-0x000000001C8C6000-memory.dmp

Filesize
472KB

Download
memory/5384-11-0x000000001C7F0000-0x000000001C80E000-memory.dmp

Filesize
120KB

Download
memory/5384-0-0x00007FF80D4A3000-0x00007FF80D4A5000-memory.dmp

Filesize
8KB

Download
memory/5384-3-0x00007FF80D4A0000-0x00007FF80DF61000-memory.dmp

Filesize
10.8MB

Download
memory/5384-2-0x00007FF80D4A0000-0x00007FF80DF61000-memory.dmp

Filesize
10.8MB

Download
memory/5384-1-0x0000000000CC0000-0x0000000000CD6000-memory.dmp

Filesize
88KB

Download
memory/5384-156-0x00007FF80D4A0000-0x00007FF80DF61000-memory.dmp

Filesize
10.8MB

Download
memory/5384-159-0x00007FF80D4A0000-0x00007FF80DF61000-memory.dmp

Filesize
10.8MB

Download
memory/5384-164-0x00007FF80D4A0000-0x00007FF80DF61000-memory.dmp

Filesize
10.8MB

Download
memory/5384-171-0x00000000012D0000-0x000000000134A000-memory.dmp

Filesize
488KB

Download
memory/5384-206-0x000000001CDA0000-0x000000001CE52000-memory.dmp

Filesize
712KB

Download
memory/5384-208-0x00007FF80D4A0000-0x00007FF80DF61000-memory.dmp

Filesize
10.8MB

Download
memory/5384-209-0x00007FF80D4A0000-0x00007FF80DF61000-memory.dmp

Filesize
10.8MB

Download
memory/5384-210-0x00007FF80D4A0000-0x00007FF80DF61000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads