asyncrat | 02cb8f411c6ae91fb1f59202d25096bd4e523569cb0d9332f97253ea9518dce0

Analysis

max time kernel
93s
max time network
94s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
07-08-2024 11:27

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General

Target

Shellbag anylizer.exe
Size

237KB
MD5

d450127ec998b5e2b630e160d2f7fd37
SHA1

601cb671b90b78470801910d06aa8a1eceb61100
SHA256

02cb8f411c6ae91fb1f59202d25096bd4e523569cb0d9332f97253ea9518dce0
SHA512

fc9fe9b0e04469d48ca27718bf167c96fa659cd059126f0a34a7fba7200cf6f75a38ad0bc6c364c517c9cf02a511c0c47c3e3de02fae9f92def10100b1fb388f
SSDEEP

6144:cJLb1wF9kfK8rpClz0KBb6o589GHWHWujiSPbQ:cJ/gBuj/Ps

Score

10^/10

asyncrat stealerium default collection credential_access discovery persistence privilege_escalation rat spyware stealer

Malware Config

Extracted

Family

asyncrat

Botnet

Default

Attributes

delay
1
install
true
install_file
update.exe
install_folder
%AppData%
pastebin_config
https://pastebin.com/raw/m5mgzzdQ

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Stealerium
An open source info stealer written in C# first seen in May 2022.
stealer stealerium

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/files/0x0006000000016985-10.dat	family_asyncrat

Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

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-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	Shellbag anylizer.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	update.exe

Executes dropped EXE 1 IoCs

pid	Process
64	update.exe

Reads user/profile data of web browsers 2 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

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	update.exe
Key opened	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	update.exe
Key opened	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	update.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs

Web Service

T1102

flow	ioc
13	pastebin.com
14	pastebin.com
15	7.tcp.eu.ngrok.io

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
39	icanhazip.com
42	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 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
Key opened	\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
2960	cmd.exe
1944	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	update.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	update.exe

Delays execution with timeout.exe 2 IoCs

evasion

pid	Process
820	timeout.exe
3652	timeout.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
2012	schtasks.exe

Suspicious behavior: EnumeratesProcesses 43 IoCs

pid	Process
2328	Shellbag anylizer.exe
2328	Shellbag anylizer.exe
2328	Shellbag anylizer.exe
2328	Shellbag anylizer.exe
2328	Shellbag anylizer.exe
2328	Shellbag anylizer.exe
2328	Shellbag anylizer.exe
2328	Shellbag anylizer.exe
2328	Shellbag anylizer.exe
2328	Shellbag anylizer.exe
2328	Shellbag anylizer.exe
2328	Shellbag anylizer.exe
2328	Shellbag anylizer.exe
2328	Shellbag anylizer.exe
2328	Shellbag anylizer.exe
2328	Shellbag anylizer.exe
2328	Shellbag anylizer.exe
2328	Shellbag anylizer.exe
2328	Shellbag anylizer.exe
2328	Shellbag anylizer.exe
2328	Shellbag anylizer.exe
64	update.exe
64	update.exe
64	update.exe
64	update.exe
64	update.exe
64	update.exe
64	update.exe
64	update.exe
64	update.exe
64	update.exe
64	update.exe
64	update.exe
64	update.exe
64	update.exe
64	update.exe
64	update.exe
64	update.exe
64	update.exe
64	update.exe
64	update.exe
64	update.exe
64	update.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2328	Shellbag anylizer.exe
Token: SeDebugPrivilege	2328	Shellbag anylizer.exe
Token: SeDebugPrivilege	64	update.exe
Token: SeDebugPrivilege	64	update.exe

Suspicious use of WriteProcessMemory 32 IoCs

description	pid	Process	procid_target
PID 2328 wrote to memory of 1840	2328	Shellbag anylizer.exe	86
PID 2328 wrote to memory of 1840	2328	Shellbag anylizer.exe	86
PID 2328 wrote to memory of 5028	2328	Shellbag anylizer.exe	88
PID 2328 wrote to memory of 5028	2328	Shellbag anylizer.exe	88
PID 5028 wrote to memory of 820	5028	cmd.exe	90
PID 5028 wrote to memory of 820	5028	cmd.exe	90
PID 1840 wrote to memory of 2012	1840	cmd.exe	91
PID 1840 wrote to memory of 2012	1840	cmd.exe	91
PID 5028 wrote to memory of 64	5028	cmd.exe	92
PID 5028 wrote to memory of 64	5028	cmd.exe	92
PID 64 wrote to memory of 2960	64	update.exe	97
PID 64 wrote to memory of 2960	64	update.exe	97
PID 2960 wrote to memory of 4864	2960	cmd.exe	99
PID 2960 wrote to memory of 4864	2960	cmd.exe	99
PID 2960 wrote to memory of 1944	2960	cmd.exe	100
PID 2960 wrote to memory of 1944	2960	cmd.exe	100
PID 2960 wrote to memory of 2328	2960	cmd.exe	101
PID 2960 wrote to memory of 2328	2960	cmd.exe	101
PID 64 wrote to memory of 2020	64	update.exe	102
PID 64 wrote to memory of 2020	64	update.exe	102
PID 2020 wrote to memory of 2876	2020	cmd.exe	104
PID 2020 wrote to memory of 2876	2020	cmd.exe	104
PID 2020 wrote to memory of 4240	2020	cmd.exe	105
PID 2020 wrote to memory of 4240	2020	cmd.exe	105
PID 64 wrote to memory of 1480	64	update.exe	106
PID 64 wrote to memory of 1480	64	update.exe	106
PID 64 wrote to memory of 1588	64	update.exe	108
PID 64 wrote to memory of 1588	64	update.exe	108
PID 1480 wrote to memory of 1676	1480	cmd.exe	110
PID 1480 wrote to memory of 1676	1480	cmd.exe	110
PID 1588 wrote to memory of 3652	1588	cmd.exe	111
PID 1588 wrote to memory of 3652	1588	cmd.exe	111

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-1-5-21-1302416131-1437503476-2806442725-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	update.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	update.exe

C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.exe
"C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2328
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "update" /tr '"C:\Users\Admin\AppData\Roaming\update.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1840
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "update" /tr '"C:\Users\Admin\AppData\Roaming\update.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2012
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp6542.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:5028
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:820
- - C:\Users\Admin\AppData\Roaming\update.exe
    "C:\Users\Admin\AppData\Roaming\update.exe"
    3⤵
    - Checks computer location settings
    - 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:64
  - - C:\Windows\SYSTEM32\cmd.exe
      "cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
      4⤵
      System Network Configuration Discovery: Wi-Fi Discovery
      Suspicious use of WriteProcessMemory
      PID:2960
    - - C:\Windows\system32\chcp.com
        
        chcp 65001
        5⤵
        
        PID:4864
    - - C:\Windows\system32\netsh.exe
        
        netsh wlan show profile
        5⤵
        Event Triggered Execution: Netsh Helper DLL
        System Network Configuration Discovery: Wi-Fi Discovery
        
        PID:1944
    - - C:\Windows\system32\findstr.exe
        
        findstr All
        5⤵
        
        PID:2328
  - - C:\Windows\SYSTEM32\cmd.exe
      "cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2020
    - - C:\Windows\system32\chcp.com
        
        chcp 65001
        5⤵
        
        PID:2876
    - - C:\Windows\system32\netsh.exe
        
        netsh wlan show networks mode=bssid
        5⤵
        Event Triggered Execution: Netsh Helper DLL
        
        PID:4240
  - - C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /delete /f /tn "update"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1480
    - - C:\Windows\system32\schtasks.exe
        
        schtasks /delete /f /tn "update"
        5⤵
        
        PID:1676
  - - C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp58D1.tmp.bat""
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1588
    - - C:\Windows\system32\timeout.exe
        
        timeout 3
        5⤵
        Delays execution with timeout.exe
        
        PID:3652

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 Network Configuration Discovery

T1016

Wi-Fi Discovery

T1016.002

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\7ba86534f3f85154d4d7b73717663638\Admin@ODZKDRGV_en-US\System\Process.txt

Filesize
2KB

MD5
4bc3baf5e4864c97ff7cddf2bfa55cda

SHA1
d528ee58f31076d0fb126b8d5cac213ac52a7e1c

SHA256
1a8697a13b30afe47e7e877ab2d9daffacde37cf6fa2e28ed5e05f9890fc713c

SHA512
70bc4fe6a4f60b47ef4a8935f87ea52ddb857f0a0b870c8067bb92418426714d73555573b7a1cc6a2f5ee7e71b183c654489d3532ed0420e330589f144ca281f

Download Submit
C:\Users\Admin\AppData\Local\7ba86534f3f85154d4d7b73717663638\Admin@ODZKDRGV_en-US\System\Process.txt

Filesize
3KB

MD5
bde0ad6fc7dd839e3164fecb6694fba5

SHA1
5a653a4342485d0d4b9b0059b4e910beb1aaab52

SHA256
09711c98be9d28e9e2ea931b729044453c79ac3400d7afb21aad7c57c08c0c42

SHA512
39dbb74599f2dd5195f660089af3b41a34b0b117f065839b3921dc410bbb85818bfae2e84f5682159fe5504d13df88b3ab1311daa8158b190ee3ae7b32a168ae

Download Submit
C:\Users\Admin\AppData\Local\7ba86534f3f85154d4d7b73717663638\Admin@ODZKDRGV_en-US\System\Process.txt

Filesize
4KB

MD5
d269d367a4438f40e7b186f813b0289b

SHA1
fa64ffedec8c399293471b783abd9f5a018983bb

SHA256
515797079b8bdfb818b3f95cf879933b40207640852f27546d08d63f5e92b50a

SHA512
9d8f6a535ff3bce4c0a63564b9e84622b4a41265b3d72bbea0873f63642f88ab629d6481ff80355a63c60069c1c7f5a6554c6ff1717fb19b37be4a000229ca80

Download Submit
C:\Users\Admin\AppData\Local\7ba86534f3f85154d4d7b73717663638\Admin@ODZKDRGV_en-US\System\Process.txt

Filesize
740B

MD5
f7272a518032fbd44f2ffbf18b27ebad

SHA1
15827f8434340e62151c5c0ea2e80a8c14d56f9b

SHA256
d004dd481cf423017511cf00c52a636e6b87a3e47ba629dff598360f8787454a

SHA512
ba4ba62843efd437678b4d0968cb4cebc53432ba94efecf9b326d5f0d14fffea2d1da9d3cdbff30fbd1eed4efad2c123078a1b2f822c39a8237acb55b3cc6530

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp58D1.tmp.bat

Filesize
155B

MD5
f119c125f7e057093bed0370d0549edf

SHA1
964b28908cc215535f218fb7b30c5791ed11eaf7

SHA256
11c2c8b7b3335f0947022cdc527704c86b4f59108fb90d9b00a6b94f11f970ed

SHA512
94de260f928c1bfea8114a37fafc6a8ab98d825ece3e8fa43464c2362efa15fc4cded9aa72081fe210fdadd5e6367a44b7bd9a92f627247baf14e09b42ea9466

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp6542.tmp.bat

Filesize
150B

MD5
9c96aa22379f51e68bd855bd2e92f4b1

SHA1
d4b352212f45a80f24b78f36a7b483ea14353063

SHA256
d9afdf56e87887de9293db1389184f740d9ed8d8ab2f9221b069728a565e8aa4

SHA512
e144087f25d02fb9644adeee6773573beeccf3e2c57ec82f8c7212c07a9a0827ab9a77bb657310074949b1a60d2214290b90ca3aaaa94d94a36e2a77422f9656

Download Submit
C:\Users\Admin\AppData\Roaming\update.exe

Filesize
237KB

MD5
d450127ec998b5e2b630e160d2f7fd37

SHA1
601cb671b90b78470801910d06aa8a1eceb61100

SHA256
02cb8f411c6ae91fb1f59202d25096bd4e523569cb0d9332f97253ea9518dce0

SHA512
fc9fe9b0e04469d48ca27718bf167c96fa659cd059126f0a34a7fba7200cf6f75a38ad0bc6c364c517c9cf02a511c0c47c3e3de02fae9f92def10100b1fb388f

Download Submit
memory/64-13-0x000000001CF00000-0x000000001D088000-memory.dmp

Filesize
1.5MB

Download
memory/64-12-0x000000001CE80000-0x000000001CEF6000-memory.dmp

Filesize
472KB

Download
memory/64-14-0x000000001CE00000-0x000000001CE1E000-memory.dmp

Filesize
120KB

Download
memory/64-19-0x000000001B970000-0x000000001B97A000-memory.dmp

Filesize
40KB

Download
memory/64-167-0x000000001D200000-0x000000001D27A000-memory.dmp

Filesize
488KB

Download
memory/64-202-0x000000001D800000-0x000000001D8B2000-memory.dmp

Filesize
712KB

Download
memory/2328-0-0x00007FFD07613000-0x00007FFD07615000-memory.dmp

Filesize
8KB

Download
memory/2328-7-0x00007FFD07610000-0x00007FFD080D1000-memory.dmp

Filesize
10.8MB

Download
memory/2328-2-0x00007FFD07610000-0x00007FFD080D1000-memory.dmp

Filesize
10.8MB

Download
memory/2328-1-0x0000000000230000-0x0000000000272000-memory.dmp

Filesize
264KB

Download