asyncrat | 81230dc5683cbbb387a3476001b915633332b624eeb2faec3170f7adefc2f586

General

Target

4e7889d60aa6df54e7b646e8ba30befa9bba6ddfca3ac1a5894429e0caa86295.ps1
Size

436KB
MD5

699160a16bdf0536e0fa69adcbab1e19
SHA1

ae8a6be22f05e119e7031edc79fb4a21f1268500
SHA256

4e7889d60aa6df54e7b646e8ba30befa9bba6ddfca3ac1a5894429e0caa86295
SHA512

bf2b94320790d54a3c30a57a34877f5d5d55e918943f1180fef50901b86b61e1bd48dd8c7af0a1a82de7f0b0e2af7b65dc6471fc616846c4260811c2ddc5c145
SSDEEP

1536:TUdAHeDN4NDabDzuCO4dfk2EJdMFXa/3qYrYUF1rGs4UPDc+dl3Cz6nKd35rmDeJ:T/XrXFWHlFHhfu88S

Score

10^/10

asyncrat new-encrypt discovery execution rat

Malware Config

Extracted

Family

asyncrat

Version

AWS | 3Losh

Botnet

New-Encrypt

Mutex

AsyncMutex_alosh

Attributes

delay
3
install
false
install_folder
%AppData%
pastebin_config
https://pastebin.com/raw/M1nmWeTA

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service
T1102

Processes:

flow ioc

22 pastebin.com
23 pastebin.com
Suspicious use of SetThreadContext 1 IoCs

Processes:

powershell.exe

description pid process target process

PID 2248 set thread context of 4152 2248 powershell.exe aspnet_compiler.exe
Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Using powershell.exe command.
execution

PowerShell
T1059.001

Processes:

powershell.exe

pid process

2248 powershell.exe
System Location Discovery: System Language Discovery 1 TTPs 1 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
discovery

System Language Discovery
T1614.001

Processes:

aspnet_compiler.exe

description ioc process

Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language aspnet_compiler.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

powershell.exe

pid process

2248 powershell.exe
2248 powershell.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exeaspnet_compiler.exe

description pid process

Token: SeDebugPrivilege 2248 powershell.exe
Token: SeDebugPrivilege 4152 aspnet_compiler.exe

flow	ioc
22	pastebin.com
23	pastebin.com

description	pid	process	target process
PID 2248 set thread context of 4152	2248	powershell.exe	aspnet_compiler.exe

pid	process
2248	powershell.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	aspnet_compiler.exe

pid	process
2248	powershell.exe
2248	powershell.exe

description	pid	process
Token: SeDebugPrivilege	2248	powershell.exe
Token: SeDebugPrivilege	4152	aspnet_compiler.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

powershell.exe

description	pid	process	target process
PID 2248 wrote to memory of 4152	2248	powershell.exe	aspnet_compiler.exe
PID 2248 wrote to memory of 4152	2248	powershell.exe	aspnet_compiler.exe
PID 2248 wrote to memory of 4152	2248	powershell.exe	aspnet_compiler.exe
PID 2248 wrote to memory of 4152	2248	powershell.exe	aspnet_compiler.exe
PID 2248 wrote to memory of 4152	2248	powershell.exe	aspnet_compiler.exe
PID 2248 wrote to memory of 4152	2248	powershell.exe	aspnet_compiler.exe
PID 2248 wrote to memory of 4152	2248	powershell.exe	aspnet_compiler.exe
PID 2248 wrote to memory of 4152	2248	powershell.exe	aspnet_compiler.exe

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\4e7889d60aa6df54e7b646e8ba30befa9bba6ddfca3ac1a5894429e0caa86295.ps1
1⤵
- Suspicious use of SetThreadContext
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2248

C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:4152

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_bhrbas0b.btt.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2248-17-0x00007FFEC6B10000-0x00007FFEC75D1000-memory.dmp

Filesize
10.8MB

Download
memory/2248-1-0x000001C9F1340000-0x000001C9F1362000-memory.dmp

Filesize
136KB

Download
memory/2248-11-0x00007FFEC6B10000-0x00007FFEC75D1000-memory.dmp

Filesize
10.8MB

Download
memory/2248-12-0x00007FFEC6B10000-0x00007FFEC75D1000-memory.dmp

Filesize
10.8MB

Download
memory/2248-13-0x000001C9F11E0000-0x000001C9F11EC000-memory.dmp

Filesize
48KB

Download
memory/2248-0-0x00007FFEC6B13000-0x00007FFEC6B15000-memory.dmp

Filesize
8KB

Download
memory/4152-14-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/4152-18-0x0000000074D7E000-0x0000000074D7F000-memory.dmp

Filesize
4KB

Download
memory/4152-19-0x0000000074D70000-0x0000000075520000-memory.dmp

Filesize
7.7MB

Download
memory/4152-22-0x0000000005BB0000-0x0000000005C4C000-memory.dmp

Filesize
624KB

Download
memory/4152-23-0x0000000006570000-0x0000000006B14000-memory.dmp

Filesize
5.6MB

Download
memory/4152-24-0x0000000006030000-0x0000000006096000-memory.dmp

Filesize
408KB

Download
memory/4152-25-0x0000000074D7E000-0x0000000074D7F000-memory.dmp

Filesize
4KB

Download
memory/4152-26-0x0000000074D70000-0x0000000075520000-memory.dmp

Filesize
7.7MB

Download

Analysis

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