asyncrat | 6fed9ac910b4570ce24f3d4230fbe550f181ad5f1ab089725e3eb9f7e8142f2e

General

Target

6fed9ac910b4570ce24f3d4230fbe550f181ad5f1ab089725e3eb9f7e8142f2e.exe
Size

1.6MB
MD5

166d084ca362984e8c8759c77644963e
SHA1

2a020dd02a2882c9a785ea5f81e435413f90bf36
SHA256

6fed9ac910b4570ce24f3d4230fbe550f181ad5f1ab089725e3eb9f7e8142f2e
SHA512

ddce968417460650561dcbfd9d61c413fc5bff892a4b0263aeed911f07954d57d1413af35a73d45edbdb4975e59eecbb782be20b5097c2e781295e95b08c770a
SSDEEP

12288:Pvql1LFyp0Qgxun0rYe6MrQKrKFPyvrvA7fP:gL8/gx16MrQKrgPyvbA7P

Score

10^/10

asyncrat default discovery evasion execution rat trojan

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

95.179.135.209:1989

Mutex

FhYe09MKTBbQ

Attributes

delay
3
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

UAC bypass 3 TTPs 1 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Processes:

6fed9ac910b4570ce24f3d4230fbe550f181ad5f1ab089725e3eb9f7e8142f2e.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	6fed9ac910b4570ce24f3d4230fbe550f181ad5f1ab089725e3eb9f7e8142f2e.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
execution

PowerShell
T1059.001

Processes:

powershell.exe

pid process

2304 powershell.exe

pid	process
2304	powershell.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

T1082

Processes:

6fed9ac910b4570ce24f3d4230fbe550f181ad5f1ab089725e3eb9f7e8142f2e.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	6fed9ac910b4570ce24f3d4230fbe550f181ad5f1ab089725e3eb9f7e8142f2e.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	6fed9ac910b4570ce24f3d4230fbe550f181ad5f1ab089725e3eb9f7e8142f2e.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

6fed9ac910b4570ce24f3d4230fbe550f181ad5f1ab089725e3eb9f7e8142f2e.exe

description pid process target process

PID 596 set thread context of 2088 596 6fed9ac910b4570ce24f3d4230fbe550f181ad5f1ab089725e3eb9f7e8142f2e.exe jsc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
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:

jsc.exe

description ioc process

Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language jsc.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

powershell.exe

pid process

2304 powershell.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

powershell.exe

description pid process

Token: SeDebugPrivilege 2304 powershell.exe

description	pid	process	target process
PID 596 set thread context of 2088	596	6fed9ac910b4570ce24f3d4230fbe550f181ad5f1ab089725e3eb9f7e8142f2e.exe	jsc.exe

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

pid	process
2304	powershell.exe

description	pid	process
Token: SeDebugPrivilege	2304	powershell.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

6fed9ac910b4570ce24f3d4230fbe550f181ad5f1ab089725e3eb9f7e8142f2e.exe

description	pid	process	target process
PID 596 wrote to memory of 2304	596	6fed9ac910b4570ce24f3d4230fbe550f181ad5f1ab089725e3eb9f7e8142f2e.exe	powershell.exe
PID 596 wrote to memory of 2304	596	6fed9ac910b4570ce24f3d4230fbe550f181ad5f1ab089725e3eb9f7e8142f2e.exe	powershell.exe
PID 596 wrote to memory of 2304	596	6fed9ac910b4570ce24f3d4230fbe550f181ad5f1ab089725e3eb9f7e8142f2e.exe	powershell.exe
PID 596 wrote to memory of 2088	596	6fed9ac910b4570ce24f3d4230fbe550f181ad5f1ab089725e3eb9f7e8142f2e.exe	jsc.exe
PID 596 wrote to memory of 2088	596	6fed9ac910b4570ce24f3d4230fbe550f181ad5f1ab089725e3eb9f7e8142f2e.exe	jsc.exe
PID 596 wrote to memory of 2088	596	6fed9ac910b4570ce24f3d4230fbe550f181ad5f1ab089725e3eb9f7e8142f2e.exe	jsc.exe
PID 596 wrote to memory of 2088	596	6fed9ac910b4570ce24f3d4230fbe550f181ad5f1ab089725e3eb9f7e8142f2e.exe	jsc.exe
PID 596 wrote to memory of 2088	596	6fed9ac910b4570ce24f3d4230fbe550f181ad5f1ab089725e3eb9f7e8142f2e.exe	jsc.exe
PID 596 wrote to memory of 2088	596	6fed9ac910b4570ce24f3d4230fbe550f181ad5f1ab089725e3eb9f7e8142f2e.exe	jsc.exe
PID 596 wrote to memory of 2088	596	6fed9ac910b4570ce24f3d4230fbe550f181ad5f1ab089725e3eb9f7e8142f2e.exe	jsc.exe
PID 596 wrote to memory of 2088	596	6fed9ac910b4570ce24f3d4230fbe550f181ad5f1ab089725e3eb9f7e8142f2e.exe	jsc.exe
PID 596 wrote to memory of 2088	596	6fed9ac910b4570ce24f3d4230fbe550f181ad5f1ab089725e3eb9f7e8142f2e.exe	jsc.exe
PID 596 wrote to memory of 1712	596	6fed9ac910b4570ce24f3d4230fbe550f181ad5f1ab089725e3eb9f7e8142f2e.exe	WerFault.exe
PID 596 wrote to memory of 1712	596	6fed9ac910b4570ce24f3d4230fbe550f181ad5f1ab089725e3eb9f7e8142f2e.exe	WerFault.exe
PID 596 wrote to memory of 1712	596	6fed9ac910b4570ce24f3d4230fbe550f181ad5f1ab089725e3eb9f7e8142f2e.exe	WerFault.exe

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

T1112

Processes:

6fed9ac910b4570ce24f3d4230fbe550f181ad5f1ab089725e3eb9f7e8142f2e.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	6fed9ac910b4570ce24f3d4230fbe550f181ad5f1ab089725e3eb9f7e8142f2e.exe

C:\Users\Admin\AppData\Local\Temp\6fed9ac910b4570ce24f3d4230fbe550f181ad5f1ab089725e3eb9f7e8142f2e.exe
"C:\Users\Admin\AppData\Local\Temp\6fed9ac910b4570ce24f3d4230fbe550f181ad5f1ab089725e3eb9f7e8142f2e.exe"
1⤵
- UAC bypass
- Checks whether UAC is enabled
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
- System policy modification
PID:596
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\6fed9ac910b4570ce24f3d4230fbe550f181ad5f1ab089725e3eb9f7e8142f2e.exe" -Force
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2304
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2088
- C:\Windows\system32\WerFault.exe
  C:\Windows\system32\WerFault.exe -u -p 596 -s 792
  2⤵
  PID:1712

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

Abuse Elevation Control Mechanism

1

T1548

Bypass User Account Control

1

T1548.002

Defense Evasion

Abuse Elevation Control Mechanism

1

T1548

Bypass User Account Control

1

T1548.002

Impair Defenses

1

T1562

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/596-0-0x000007FEF5BD3000-0x000007FEF5BD4000-memory.dmp

Filesize
4KB

Download
memory/596-1-0x0000000000EA0000-0x0000000000EA8000-memory.dmp

Filesize
32KB

Download
memory/596-2-0x000007FEF5BD0000-0x000007FEF65BC000-memory.dmp

Filesize
9.9MB

Download
memory/596-3-0x0000000000C80000-0x0000000000CE4000-memory.dmp

Filesize
400KB

Download
memory/596-21-0x000007FEF5BD0000-0x000007FEF65BC000-memory.dmp

Filesize
9.9MB

Download
memory/2088-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2088-15-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2088-17-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2088-11-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2088-10-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2088-9-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2088-8-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2088-13-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2304-18-0x0000000002A90000-0x0000000002B10000-memory.dmp

Filesize
512KB

Download
memory/2304-19-0x000000001B7B0000-0x000000001BA92000-memory.dmp

Filesize
2.9MB

Download
memory/2304-20-0x0000000002240000-0x0000000002248000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads