asyncrat | 6fed9ac910b4570ce24f3d4230fbe550f181ad5f1ab089725e3eb9f7e8142f2e

General

Target

PO-341999-PDF.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

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	PO-341999-PDF.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

pid	Process
2000	powershell.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	PO-341999-PDF.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	PO-341999-PDF.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2592 set thread context of 2044	2592	PO-341999-PDF.exe	32

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

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

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2000	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2000	powershell.exe
Token: SeDebugPrivilege	2044	jsc.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2592 wrote to memory of 2000	2592	PO-341999-PDF.exe	30
PID 2592 wrote to memory of 2000	2592	PO-341999-PDF.exe	30
PID 2592 wrote to memory of 2000	2592	PO-341999-PDF.exe	30
PID 2592 wrote to memory of 2044	2592	PO-341999-PDF.exe	32
PID 2592 wrote to memory of 2044	2592	PO-341999-PDF.exe	32
PID 2592 wrote to memory of 2044	2592	PO-341999-PDF.exe	32
PID 2592 wrote to memory of 2044	2592	PO-341999-PDF.exe	32
PID 2592 wrote to memory of 2044	2592	PO-341999-PDF.exe	32
PID 2592 wrote to memory of 2044	2592	PO-341999-PDF.exe	32
PID 2592 wrote to memory of 2044	2592	PO-341999-PDF.exe	32
PID 2592 wrote to memory of 2044	2592	PO-341999-PDF.exe	32
PID 2592 wrote to memory of 2044	2592	PO-341999-PDF.exe	32
PID 2592 wrote to memory of 264	2592	PO-341999-PDF.exe	33
PID 2592 wrote to memory of 264	2592	PO-341999-PDF.exe	33
PID 2592 wrote to memory of 264	2592	PO-341999-PDF.exe	33

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	PO-341999-PDF.exe

C:\Users\Admin\AppData\Local\Temp\PO-341999-PDF.exe
"C:\Users\Admin\AppData\Local\Temp\PO-341999-PDF.exe"
1⤵
- UAC bypass
- Checks whether UAC is enabled
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
- System policy modification
PID:2592
- 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\PO-341999-PDF.exe" -Force
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2000
- 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
  - Suspicious use of AdjustPrivilegeToken
  PID:2044
- C:\Windows\system32\WerFault.exe
  C:\Windows\system32\WerFault.exe -u -p 2592 -s 868
  2⤵
  PID:264

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

C:\Users\Admin\AppData\Local\Temp\CabDC3D.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
memory/2000-8-0x0000000002D90000-0x0000000002E10000-memory.dmp

Filesize
512KB

Download
memory/2000-10-0x0000000002310000-0x0000000002318000-memory.dmp

Filesize
32KB

Download
memory/2000-9-0x000000001B6F0000-0x000000001B9D2000-memory.dmp

Filesize
2.9MB

Download
memory/2044-15-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2044-11-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2044-17-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2044-13-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2044-19-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2044-20-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2044-21-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2044-22-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2592-3-0x0000000000750000-0x00000000007B4000-memory.dmp

Filesize
400KB

Download
memory/2592-2-0x000007FEF5EC0000-0x000007FEF68AC000-memory.dmp

Filesize
9.9MB

Download
memory/2592-0-0x000007FEF5EC3000-0x000007FEF5EC4000-memory.dmp

Filesize
4KB

Download
memory/2592-1-0x00000000000A0000-0x00000000000A8000-memory.dmp

Filesize
32KB

Download
memory/2592-39-0x000007FEF5EC0000-0x000007FEF68AC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads