asyncrat | 791722d558475d9ed6219a5b22c6cb2df2a18928a5cc5b7b341f59fc024093c9

General

Target

big.ps1
Size

11.2MB
MD5

cbf8ae11065184964e7ee9533836c668
SHA1

34047bde03d2615d876d21106538e27132c81ae6
SHA256

791722d558475d9ed6219a5b22c6cb2df2a18928a5cc5b7b341f59fc024093c9
SHA512

a5e9b59a00327f0da6006f43edff006caf26271f7d25a1bcc094bc9d94db9da63fc6fbe26183a1745acf6e2fe86b1f600725c7f3677a06bcc7d12e216e764b40
SSDEEP

49152:/H+uozbw6H4JCHhy2rc70OvlOXFSP7gVf:2

Score

10^/10

asyncrat stealerium default collection rat stealer

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

91.92.252.234:3232

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
Stealerium
An open source info stealer written in C# first seen in May 2022.
stealer stealerium
Suspicious use of NtCreateUserProcessOtherParentProcess 1 IoCs

Processes:

powershell.exe

description pid process target process

PID 4348 created 3372 4348 powershell.exe Explorer.EXE

description	pid	process	target process
PID 4348 created 3372	4348	powershell.exe	Explorer.EXE

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/4444-21-0x000001853A340000-0x000001853A356000-memory.dmp	family_asyncrat

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

Processes:

notepad.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-553605503-2331009851-2137262461-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	notepad.exe
Key opened	\REGISTRY\USER\S-1-5-21-553605503-2331009851-2137262461-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	notepad.exe
Key opened	\REGISTRY\USER\S-1-5-21-553605503-2331009851-2137262461-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	notepad.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

41 icanhazip.com
44 ip-api.com
Looks up geolocation information via web service
Uses a legitimate geolocation service to find the infected system's geolocation info.

flow	ioc
41	icanhazip.com
44	ip-api.com

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:

notepad.exe

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

Suspicious behavior: EnumeratesProcesses 25 IoCs

Processes:

powershell.exenotepad.exe

pid	process
4348	powershell.exe
4348	powershell.exe
4348	powershell.exe
4444	notepad.exe
4444	notepad.exe
4444	notepad.exe
4444	notepad.exe
4444	notepad.exe
4444	notepad.exe
4444	notepad.exe
4444	notepad.exe
4444	notepad.exe
4444	notepad.exe
4444	notepad.exe
4444	notepad.exe
4444	notepad.exe
4444	notepad.exe
4444	notepad.exe
4444	notepad.exe
4444	notepad.exe
4444	notepad.exe
4444	notepad.exe
4444	notepad.exe
4444	notepad.exe
4444	notepad.exe

Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 1 IoCs

Processes:

powershell.exe

pid process

4348 powershell.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exenotepad.exe

description pid process

Token: SeDebugPrivilege 4348 powershell.exe
Token: SeDebugPrivilege 4444 notepad.exe

description	pid	process
Token: SeDebugPrivilege	4348	powershell.exe
Token: SeDebugPrivilege	4444	notepad.exe

Suspicious use of WriteProcessMemory 64 IoCs

Processes:

powershell.exe

description	pid	process	target process
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe
PID 4348 wrote to memory of 4444	4348	powershell.exe	notepad.exe

outlook_office_path 1 IoCs

Processes:

notepad.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-553605503-2331009851-2137262461-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	notepad.exe

outlook_win_path 1 IoCs

Processes:

notepad.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-553605503-2331009851-2137262461-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	notepad.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3372

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\big.ps1
2⤵
- Suspicious use of NtCreateUserProcessOtherParentProcess
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4348

C:\Windows\System32\notepad.exe
C:\Windows\System32\notepad.exe
2⤵
- Accesses Microsoft Outlook profiles
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:4444

C:\Windows\System32\cmd.exe
"cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
3⤵
PID:4880

C:\Windows\System32\chcp.com
chcp 65001
4⤵
PID:2148

C:\Windows\System32\netsh.exe
netsh wlan show profile
4⤵
PID:1904

C:\Windows\System32\findstr.exe
findstr All
4⤵
PID:1268

C:\Windows\System32\cmd.exe
"cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
3⤵
PID:3492

C:\Windows\System32\chcp.com
chcp 65001
4⤵
PID:4456

C:\Windows\System32\netsh.exe
netsh wlan show networks mode=bssid
4⤵
PID:1808

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Email Collection

1

T1114

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\820ab7b6e8b795fe41ed18441a171bde\Admin@NCRNVAGW_en-US\Browsers\Mozilla\Firefox\Bookmarks.txt
Filesize
105B

MD5
2e9d094dda5cdc3ce6519f75943a4ff4

SHA1
5d989b4ac8b699781681fe75ed9ef98191a5096c

SHA256
c84c98bbf5e0ef9c8d0708b5d60c5bb656b7d6be5135d7f7a8d25557e08cf142

SHA512
d1f7eed00959e902bdb2125b91721460d3ff99f3bdfc1f2a343d4f58e8d4e5e5a06c0c6cdc0379211c94510f7c00d7a8b34fa7d0ca0c3d54cbbe878f1e9812b7

Download Submit
C:\Users\Admin\AppData\Local\820ab7b6e8b795fe41ed18441a171bde\Admin@NCRNVAGW_en-US\System\Process.txt
Filesize
1KB

MD5
2ca81236e5413454c1824b651865bc9d

SHA1
c7091ac6435d5bc95ff626caece5697a63ee182c

SHA256
6eb611111082ad6cdf5fedac1110c001d31e01da922c055dd556b11b457085d5

SHA512
f0438af72857885901532724a153fde1beeff0d2090afaa24a6df64a3fc1b5690a7fe885a30dc85d1412c452338b92f328ca0cbd9a96b75d6a99eb88e214330a

Download Submit
C:\Users\Admin\AppData\Local\820ab7b6e8b795fe41ed18441a171bde\Admin@NCRNVAGW_en-US\System\Process.txt
Filesize
4KB

MD5
122d692f25490286c16af82e63760456

SHA1
fa3ff1ab1e75343f6d8efd658eab2976cdf3e889

SHA256
c48a871064a193e0d159cd3f9eb5117c72af18524d39600253990dda7566cf8c

SHA512
c8243364a55201b75caf8186ba3738a1df5830de0df75c4ff0991d5404873b9f1a3caa8054cb212f920523d05bf90c0125be3c10324535169b68b0d0ba37f1b2

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3xu5rx2a.211.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/4348-14-0x0000014BB2B80000-0x0000014BB2BDA000-memory.dmp

Filesize
360KB

Download
memory/4348-13-0x0000014BCB190000-0x0000014BCB1A0000-memory.dmp

Filesize
64KB

Download
memory/4348-11-0x0000014BCB190000-0x0000014BCB1A0000-memory.dmp

Filesize
64KB

Download
memory/4348-15-0x0000014BDB890000-0x0000014BDB8EB000-memory.dmp

Filesize
364KB

Download
memory/4348-12-0x0000014BCB190000-0x0000014BCB1A0000-memory.dmp

Filesize
64KB

Download
memory/4348-19-0x00007FFDE7BA0000-0x00007FFDE8661000-memory.dmp

Filesize
10.8MB

Download
memory/4348-10-0x00007FFDE7BA0000-0x00007FFDE8661000-memory.dmp

Filesize
10.8MB

Download
memory/4348-20-0x0000014BDB890000-0x0000014BDB8EB000-memory.dmp

Filesize
364KB

Download
memory/4348-5-0x0000014BCB3B0000-0x0000014BCB3D2000-memory.dmp

Filesize
136KB

Download
memory/4444-26-0x00000185531A0000-0x0000018553328000-memory.dmp

Filesize
1.5MB

Download
memory/4444-171-0x0000018552D50000-0x0000018552D60000-memory.dmp

Filesize
64KB

Download
memory/4444-25-0x0000018553120000-0x0000018553196000-memory.dmp

Filesize
472KB

Download
memory/4444-23-0x0000018552D50000-0x0000018552D60000-memory.dmp

Filesize
64KB

Download
memory/4444-27-0x0000018552CE0000-0x0000018552CFE000-memory.dmp

Filesize
120KB

Download
memory/4444-32-0x000001853A3F0000-0x000001853A3FA000-memory.dmp

Filesize
40KB

Download
memory/4444-34-0x00007FFDE7BA0000-0x00007FFDE8661000-memory.dmp

Filesize
10.8MB

Download
memory/4444-22-0x00007FFDE7BA0000-0x00007FFDE8661000-memory.dmp

Filesize
10.8MB

Download
memory/4444-21-0x000001853A340000-0x000001853A356000-memory.dmp

Filesize
88KB

Download
memory/4444-24-0x0000018552D50000-0x0000018552D60000-memory.dmp

Filesize
64KB

Download
memory/4444-172-0x0000018552D50000-0x0000018552D60000-memory.dmp

Filesize
64KB

Download
memory/4444-173-0x0000018552D50000-0x0000018552D60000-memory.dmp

Filesize
64KB

Download
memory/4444-174-0x0000018552D50000-0x0000018552D60000-memory.dmp

Filesize
64KB

Download
memory/4444-181-0x0000018552D50000-0x0000018552D60000-memory.dmp

Filesize
64KB

Download
memory/4444-182-0x00007FFE05D90000-0x00007FFE05F85000-memory.dmp

Filesize
2.0MB

Download
memory/4444-187-0x0000018553790000-0x000001855380A000-memory.dmp

Filesize
488KB

Download
memory/4444-16-0x0000018538800000-0x0000018538816000-memory.dmp

Filesize
88KB

Download
memory/4444-222-0x0000018552D50000-0x0000018552D60000-memory.dmp

Filesize
64KB

Download
memory/4444-223-0x0000018552D50000-0x0000018552D60000-memory.dmp

Filesize
64KB

Download
memory/4444-224-0x00007FFE05D90000-0x00007FFE05F85000-memory.dmp

Filesize
2.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads