asyncrat | 5f19a9226fad05ac74b065bf8691daf121a04c33469e712e684dc9162e67b2fb

Analysis

max time kernel
298s
max time network
301s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
27-09-2022 08:42

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

a.ps1
Size

567B
MD5

b3cd9511ce088df0735164e5f5e7761e
SHA1

7ce808db75239f6931c3551d8ba96cc6d668967d
SHA256

5f19a9226fad05ac74b065bf8691daf121a04c33469e712e684dc9162e67b2fb
SHA512

30a023f496fcc2b43b0aba8ce113293cb902c17a1ab3f85848ecf66d35309faae3ba4d148efa4753ea75bb3fc97369db85235cec36de0017e132eadedfe20e7b

Score

10^/10

asyncrat default persistence rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

zerocool888.duckdns.org:8848

zerocool888.duckdns.org:8898

Mutex

DcRatMutex_imlegion

Attributes

delay
1
install
false
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat

Async RAT payload 2 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/5040-134-0x0000000000400000-0x0000000000416000-memory.dmp	asyncrat
behavioral2/memory/5040-135-0x000000000041096E-mapping.dmp	asyncrat

Blocklisted process makes network request 4 IoCs

Processes:

powershell.exe

flow pid process

2 4572 powershell.exe
7 4572 powershell.exe
9 4572 powershell.exe
14 4572 powershell.exe

flow	pid	process
2	4572	powershell.exe
7	4572	powershell.exe
9	4572	powershell.exe
14	4572	powershell.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

reg.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\MacOS_sostemsing1nUsdf8ui3rwenIdfd9ftoieR.vbs = "C:\\ProgramData\\MacOS_sostemsing1nUsdf8ui3rwenIdfd9ftoieR\\MacOS_sostemsing1nUsdf8ui3rwenIdfd9ftoieR.vbs"	reg.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Suspicious use of SetThreadContext 1 IoCs

Processes:

powershell.exe

description pid process target process

PID 4572 set thread context of 5040 4572 powershell.exe ngentask.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

powershell.exe

pid process

4572 powershell.exe
4572 powershell.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exengentask.exe

description pid process

Token: SeDebugPrivilege 4572 powershell.exe
Token: SeDebugPrivilege 5040 ngentask.exe

description	pid	process	target process
PID 4572 set thread context of 5040	4572	powershell.exe	ngentask.exe

pid	process
4572	powershell.exe
4572	powershell.exe

description	pid	process
Token: SeDebugPrivilege	4572	powershell.exe
Token: SeDebugPrivilege	5040	ngentask.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

powershell.exe

description	pid	process	target process
PID 4572 wrote to memory of 5040	4572	powershell.exe	ngentask.exe
PID 4572 wrote to memory of 5040	4572	powershell.exe	ngentask.exe
PID 4572 wrote to memory of 5040	4572	powershell.exe	ngentask.exe
PID 4572 wrote to memory of 5040	4572	powershell.exe	ngentask.exe
PID 4572 wrote to memory of 5040	4572	powershell.exe	ngentask.exe
PID 4572 wrote to memory of 5040	4572	powershell.exe	ngentask.exe
PID 4572 wrote to memory of 5040	4572	powershell.exe	ngentask.exe
PID 4572 wrote to memory of 5040	4572	powershell.exe	ngentask.exe
PID 4572 wrote to memory of 4816	4572	powershell.exe	reg.exe
PID 4572 wrote to memory of 4816	4572	powershell.exe	reg.exe

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\a.ps1
1⤵
- Blocklisted process makes network request
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4572

C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngentask.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngentask.exe"
2⤵
- Suspicious use of AdjustPrivilegeToken
PID:5040

C:\Windows\system32\reg.exe
"C:\Windows\system32\reg.exe" add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce /v MacOS_sostemsing1nUsdf8ui3rwenIdfd9ftoieR.vbs /d C:\ProgramData\MacOS_sostemsing1nUsdf8ui3rwenIdfd9ftoieR\MacOS_sostemsing1nUsdf8ui3rwenIdfd9ftoieR.vbs
2⤵
- Adds Run key to start application
PID:4816

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Web Service

T1102

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/4572-132-0x000001977A1C0000-0x000001977A1E2000-memory.dmp

Filesize
136KB

Download
memory/4572-133-0x00007FFD10110000-0x00007FFD10BD1000-memory.dmp

Filesize
10.8MB

Download
memory/4572-137-0x00007FFD10110000-0x00007FFD10BD1000-memory.dmp

Filesize
10.8MB

Download
memory/4816-136-0x0000000000000000-mapping.dmp

Download
memory/5040-134-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/5040-135-0x000000000041096E-mapping.dmp

Download