asyncrat | 4ca7277273f9409593101a4e73211877696ae1bed8fddd28650fdd9877ffd6f0

General

Target

r132-031Payment.exe
Size

369KB
MD5

2d21173d46e5ed9795ee28f6900edfbc
SHA1

e0e16b8d5932434f0a18e1dbab1c102d818f9700
SHA256

4ca7277273f9409593101a4e73211877696ae1bed8fddd28650fdd9877ffd6f0
SHA512

c90095702262ac1bac1ed592a3417485e1ef03871a78546722f10dc3f33e4644b06391aaf090f8a4affc43dfe0223ff781699858b14fdcd77d09eff8838d9434
SSDEEP

6144:Q1cJnjX2zt02wn7GHNX+oqUXMlC6OK8Yp2sSsXB0mfnUIbj:IcJnCz/wnKHVEUXMlCMWsSIvfVbj

Score

10^/10

asyncrat default persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

bestsuccess.ddns.net:2442

Mutex

AsyncMutex_6SI8OkPnk

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

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-686452656-3203474025-4140627569-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "\"C:\\Users\\Admin\\AppData\\Roaming\\WUfC3nfL8Rd1KXnG\\jgONjF0kvHzC.exe\",explorer.exe"	r132-031Payment.exe

Async RAT payload 6 IoCs

rat

resource	yara_rule
behavioral1/memory/2108-8-0x00000000006F0000-0x0000000000702000-memory.dmp	asyncrat
behavioral1/memory/2232-11-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/2232-12-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/2232-15-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/2232-18-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/2232-20-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2108 set thread context of 2232	2108	r132-031Payment.exe	28

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2108	r132-031Payment.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2108	r132-031Payment.exe
Token: SeDebugPrivilege	2108	r132-031Payment.exe
Token: SeDebugPrivilege	2232	r132-031Payment.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2108 wrote to memory of 2232	2108	r132-031Payment.exe	28
PID 2108 wrote to memory of 2232	2108	r132-031Payment.exe	28
PID 2108 wrote to memory of 2232	2108	r132-031Payment.exe	28
PID 2108 wrote to memory of 2232	2108	r132-031Payment.exe	28
PID 2108 wrote to memory of 2232	2108	r132-031Payment.exe	28
PID 2108 wrote to memory of 2232	2108	r132-031Payment.exe	28
PID 2108 wrote to memory of 2232	2108	r132-031Payment.exe	28
PID 2108 wrote to memory of 2232	2108	r132-031Payment.exe	28
PID 2108 wrote to memory of 2232	2108	r132-031Payment.exe	28

C:\Users\Admin\AppData\Local\Temp\r132-031Payment.exe
"C:\Users\Admin\AppData\Local\Temp\r132-031Payment.exe"
1⤵
- Modifies WinLogon for persistence
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2108
- C:\Users\Admin\AppData\Local\Temp\r132-031Payment.exe
  "C:\Users\Admin\AppData\Local\Temp\r132-031Payment.exe"
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2232

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Winlogon Helper DLL

1

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Winlogon Helper DLL

1

T1547.004

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Cab67D9.tmp

Filesize
61KB

MD5
f3441b8572aae8801c04f3060b550443

SHA1
4ef0a35436125d6821831ef36c28ffaf196cda15

SHA256
6720349e7d82ee0a8e73920d3c2b7cb2912d9fcf2edb6fd98f2f12820158b0bf

SHA512
5ba01ba421b50030e380ae6bbcd2f681f2a91947fe7fedb3c8e6b5f24dce9517abf57b1cf26cc6078d4bb53bde6fcfb2561591337c841f8f2cb121a3d71661b9

Download Submit
memory/2108-22-0x0000000074420000-0x0000000074B0E000-memory.dmp

Filesize
6.9MB

Download
memory/2108-1-0x0000000074420000-0x0000000074B0E000-memory.dmp

Filesize
6.9MB

Download
memory/2108-2-0x0000000004840000-0x0000000004880000-memory.dmp

Filesize
256KB

Download
memory/2108-3-0x0000000004840000-0x0000000004880000-memory.dmp

Filesize
256KB

Download
memory/2108-4-0x0000000000210000-0x0000000000232000-memory.dmp

Filesize
136KB

Download
memory/2108-5-0x0000000000290000-0x00000000002B2000-memory.dmp

Filesize
136KB

Download
memory/2108-8-0x00000000006F0000-0x0000000000702000-memory.dmp

Filesize
72KB

Download
memory/2108-24-0x0000000004840000-0x0000000004880000-memory.dmp

Filesize
256KB

Download
memory/2108-23-0x0000000004840000-0x0000000004880000-memory.dmp

Filesize
256KB

Download
memory/2108-0-0x0000000001230000-0x0000000001292000-memory.dmp

Filesize
392KB

Download
memory/2232-12-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2232-15-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2232-18-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2232-20-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2232-21-0x0000000074420000-0x0000000074B0E000-memory.dmp

Filesize
6.9MB

Download
memory/2232-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2232-11-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2232-10-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2232-25-0x00000000011F0000-0x0000000001230000-memory.dmp

Filesize
256KB

Download
memory/2232-9-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2232-42-0x0000000074420000-0x0000000074B0E000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads