asyncrat | 819d812044fccc25692d6f0919850536d3486bdfdf296bea08ea3291fe1d425c

Analysis

max time kernel
88s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20230621-en
resource tags

arch:x64arch:x86image:win10v2004-20230621-enlocale:en-usos:windows10-2004-x64system
submitted
30/06/2023, 12:21

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General

Target

Ntprfgupx-2.exe
Size

1.8MB
MD5

1237a749cdfe8065f70beb76026fbf58
SHA1

9e9febe7441cfaa52135c32ef1827af10bdc81bf
SHA256

819d812044fccc25692d6f0919850536d3486bdfdf296bea08ea3291fe1d425c
SHA512

57217329975517c09c32c49be0da9c694a7492347c13024eef77203ee16d3caaba8e77235a991194bcab961071d7ff887a1e5501eafc234f52ee4f840d3e6166
SSDEEP

49152:zGXOVDKuXtwIarveK9plB91K70myaigDmXI:ieVDx6IaaK9plBXO03xgDmXI

Score

10^/10

asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Mutex

Aakn1515knAakn1515kn

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

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4025927695-1301755775-2607443251-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,\"C:\\Users\\Admin\\AppData\\Roaming\\Vipertex\\Saten.exe\","	Ntprfgupx-2.exe

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/memory/844-2486-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3764 set thread context of 844	3764	Ntprfgupx-2.exe	86

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3764	Ntprfgupx-2.exe
3764	Ntprfgupx-2.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3764	Ntprfgupx-2.exe
Token: SeDebugPrivilege	844	RegAsm.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 3764 wrote to memory of 2816	3764	Ntprfgupx-2.exe	85
PID 3764 wrote to memory of 2816	3764	Ntprfgupx-2.exe	85
PID 3764 wrote to memory of 2816	3764	Ntprfgupx-2.exe	85
PID 3764 wrote to memory of 844	3764	Ntprfgupx-2.exe	86
PID 3764 wrote to memory of 844	3764	Ntprfgupx-2.exe	86
PID 3764 wrote to memory of 844	3764	Ntprfgupx-2.exe	86
PID 3764 wrote to memory of 844	3764	Ntprfgupx-2.exe	86
PID 3764 wrote to memory of 844	3764	Ntprfgupx-2.exe	86
PID 3764 wrote to memory of 844	3764	Ntprfgupx-2.exe	86
PID 3764 wrote to memory of 844	3764	Ntprfgupx-2.exe	86
PID 3764 wrote to memory of 844	3764	Ntprfgupx-2.exe	86

C:\Users\Admin\AppData\Local\Temp\Ntprfgupx-2.exe
"C:\Users\Admin\AppData\Local\Temp\Ntprfgupx-2.exe"
1⤵
- Modifies WinLogon for persistence
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3764
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  2⤵
  PID:2816
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:844

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/844-2486-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/844-2489-0x0000000004D50000-0x0000000004D60000-memory.dmp

Filesize
64KB

Download
memory/844-2488-0x0000000005680000-0x000000000571C000-memory.dmp

Filesize
624KB

Download
memory/844-2487-0x0000000004D50000-0x0000000004D60000-memory.dmp

Filesize
64KB

Download
memory/3764-171-0x0000000004C50000-0x0000000004D1B000-memory.dmp

Filesize
812KB

Download
memory/3764-133-0x0000000000300000-0x00000000004DA000-memory.dmp

Filesize
1.9MB

Download
memory/3764-143-0x0000000004C50000-0x0000000004D1B000-memory.dmp

Filesize
812KB

Download
memory/3764-145-0x0000000004C50000-0x0000000004D1B000-memory.dmp

Filesize
812KB

Download
memory/3764-147-0x0000000004C50000-0x0000000004D1B000-memory.dmp

Filesize
812KB

Download
memory/3764-149-0x0000000004C50000-0x0000000004D1B000-memory.dmp

Filesize
812KB

Download
memory/3764-151-0x0000000004C50000-0x0000000004D1B000-memory.dmp

Filesize
812KB

Download
memory/3764-153-0x0000000004C50000-0x0000000004D1B000-memory.dmp

Filesize
812KB

Download
memory/3764-155-0x0000000004C50000-0x0000000004D1B000-memory.dmp

Filesize
812KB

Download
memory/3764-157-0x0000000004C50000-0x0000000004D1B000-memory.dmp

Filesize
812KB

Download
memory/3764-159-0x0000000004C50000-0x0000000004D1B000-memory.dmp

Filesize
812KB

Download
memory/3764-161-0x0000000004C50000-0x0000000004D1B000-memory.dmp

Filesize
812KB

Download
memory/3764-163-0x0000000004C50000-0x0000000004D1B000-memory.dmp

Filesize
812KB

Download
memory/3764-165-0x0000000004C50000-0x0000000004D1B000-memory.dmp

Filesize
812KB

Download
memory/3764-167-0x0000000004C50000-0x0000000004D1B000-memory.dmp

Filesize
812KB

Download
memory/3764-169-0x0000000004C50000-0x0000000004D1B000-memory.dmp

Filesize
812KB

Download
memory/3764-177-0x0000000004C50000-0x0000000004D1B000-memory.dmp

Filesize
812KB

Download
memory/3764-173-0x0000000004C50000-0x0000000004D1B000-memory.dmp

Filesize
812KB

Download
memory/3764-141-0x0000000004C50000-0x0000000004D1B000-memory.dmp

Filesize
812KB

Download
memory/3764-175-0x0000000004C50000-0x0000000004D1B000-memory.dmp

Filesize
812KB

Download
memory/3764-185-0x0000000004C50000-0x0000000004D1B000-memory.dmp

Filesize
812KB

Download
memory/3764-183-0x0000000004C50000-0x0000000004D1B000-memory.dmp

Filesize
812KB

Download
memory/3764-181-0x0000000004C50000-0x0000000004D1B000-memory.dmp

Filesize
812KB

Download
memory/3764-179-0x0000000004C50000-0x0000000004D1B000-memory.dmp

Filesize
812KB

Download
memory/3764-187-0x0000000004C50000-0x0000000004D1B000-memory.dmp

Filesize
812KB

Download
memory/3764-189-0x0000000004C50000-0x0000000004D1B000-memory.dmp

Filesize
812KB

Download
memory/3764-191-0x0000000004C50000-0x0000000004D1B000-memory.dmp

Filesize
812KB

Download
memory/3764-193-0x0000000004C50000-0x0000000004D1B000-memory.dmp

Filesize
812KB

Download
memory/3764-195-0x0000000004C50000-0x0000000004D1B000-memory.dmp

Filesize
812KB

Download
memory/3764-197-0x0000000004C50000-0x0000000004D1B000-memory.dmp

Filesize
812KB

Download
memory/3764-2478-0x0000000004F70000-0x0000000004F92000-memory.dmp

Filesize
136KB

Download
memory/3764-2479-0x0000000004ED0000-0x0000000004EE0000-memory.dmp

Filesize
64KB

Download
memory/3764-2480-0x0000000005040000-0x00000000050A6000-memory.dmp

Filesize
408KB

Download
memory/3764-2481-0x0000000031190000-0x0000000031222000-memory.dmp

Filesize
584KB

Download
memory/3764-2482-0x00000000317E0000-0x0000000031D84000-memory.dmp

Filesize
5.6MB

Download
memory/3764-139-0x0000000004C50000-0x0000000004D1B000-memory.dmp

Filesize
812KB

Download
memory/3764-137-0x0000000004C50000-0x0000000004D1B000-memory.dmp

Filesize
812KB

Download
memory/3764-135-0x0000000004C50000-0x0000000004D1B000-memory.dmp

Filesize
812KB

Download
memory/3764-134-0x0000000004C50000-0x0000000004D1B000-memory.dmp

Filesize
812KB

Download