asyncrat | 482621874529120c0ae30b4b1bd26d87bb4fa83a77934c01b16342c85e472fdf

General

Target

15c1451a81dc6fb54079174780cc9855.exe
Size

650KB
MD5

15c1451a81dc6fb54079174780cc9855
SHA1

aac1bd5467270bb06e58534127a8138a6d79a3ab
SHA256

482621874529120c0ae30b4b1bd26d87bb4fa83a77934c01b16342c85e472fdf
SHA512

b0a021cda43968d3021674d9ba602005e9889c04329857f0c71756dbc271bd13cb37f28c34d3613539aa7501fe62c4dd27878282979d9f989f4c47a944b761fe

Score

10^/10

asyncrat 18 persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

18

C2

185.157.160.136:1973

Mutex

df4Rtg34dFjwr

Attributes

anti_vm
false
bsod
false
delay
3
install
false
install_folder
%AppData%
pastebin_config
null

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat

Async RAT payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/1000-116-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral2/memory/1000-117-0x000000000040C68E-mapping.dmp	asyncrat
behavioral2/memory/1000-125-0x0000000002650000-0x000000000266B000-memory.dmp	asyncrat

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

15c1451a81dc6fb54079174780cc9855.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run	15c1451a81dc6fb54079174780cc9855.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\em = "C:\\Users\\Admin\\AppData\\Roaming\\er\\ed.exe"	15c1451a81dc6fb54079174780cc9855.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

15c1451a81dc6fb54079174780cc9855.exe

description pid process target process

PID 808 set thread context of 1000 808 15c1451a81dc6fb54079174780cc9855.exe RegAsm.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

RegAsm.exe

pid process

1000 RegAsm.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

RegAsm.exe

description pid process

Token: SeDebugPrivilege 1000 RegAsm.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

15c1451a81dc6fb54079174780cc9855.exe

pid process

808 15c1451a81dc6fb54079174780cc9855.exe

description	pid	process	target process
PID 808 set thread context of 1000	808	15c1451a81dc6fb54079174780cc9855.exe	RegAsm.exe

pid	process
1000	RegAsm.exe

description	pid	process
Token: SeDebugPrivilege	1000	RegAsm.exe

pid	process
808	15c1451a81dc6fb54079174780cc9855.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

15c1451a81dc6fb54079174780cc9855.exeRegAsm.exe

description	pid	process	target process
PID 808 wrote to memory of 1000	808	15c1451a81dc6fb54079174780cc9855.exe	RegAsm.exe
PID 808 wrote to memory of 1000	808	15c1451a81dc6fb54079174780cc9855.exe	RegAsm.exe
PID 808 wrote to memory of 1000	808	15c1451a81dc6fb54079174780cc9855.exe	RegAsm.exe
PID 808 wrote to memory of 1000	808	15c1451a81dc6fb54079174780cc9855.exe	RegAsm.exe
PID 808 wrote to memory of 1000	808	15c1451a81dc6fb54079174780cc9855.exe	RegAsm.exe
PID 808 wrote to memory of 1000	808	15c1451a81dc6fb54079174780cc9855.exe	RegAsm.exe
PID 808 wrote to memory of 1000	808	15c1451a81dc6fb54079174780cc9855.exe	RegAsm.exe
PID 808 wrote to memory of 1000	808	15c1451a81dc6fb54079174780cc9855.exe	RegAsm.exe
PID 1000 wrote to memory of 3364	1000	RegAsm.exe	cmd.exe
PID 1000 wrote to memory of 3364	1000	RegAsm.exe	cmd.exe
PID 1000 wrote to memory of 3364	1000	RegAsm.exe	cmd.exe

C:\Users\Admin\AppData\Local\Temp\15c1451a81dc6fb54079174780cc9855.exe
"C:\Users\Admin\AppData\Local\Temp\15c1451a81dc6fb54079174780cc9855.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:808

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1000

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c start /b powershell –ExecutionPolicy Bypass Start-Process -FilePath '"C:\Users\Admin\AppData\Local\Temp\iygtuk.exe"' & exit
3⤵
PID:3364

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
powershell –ExecutionPolicy Bypass Start-Process -FilePath '"C:\Users\Admin\AppData\Local\Temp\iygtuk.exe"'
4⤵
PID:856

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/1000-116-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1000-117-0x000000000040C68E-mapping.dmp

Download
memory/1000-120-0x0000000004EC0000-0x0000000004EC1000-memory.dmp

Filesize
4KB

Download
memory/1000-121-0x00000000057A0000-0x00000000057A1000-memory.dmp

Filesize
4KB

Download
memory/1000-122-0x0000000005D40000-0x0000000005D41000-memory.dmp

Filesize
4KB

Download
memory/1000-123-0x00000000058B0000-0x00000000058B1000-memory.dmp

Filesize
4KB

Download
memory/1000-124-0x00000000026D0000-0x00000000026D1000-memory.dmp

Filesize
4KB

Download
memory/1000-125-0x0000000002650000-0x000000000266B000-memory.dmp

Filesize
108KB

Download
memory/1000-126-0x0000000007780000-0x0000000007781000-memory.dmp

Filesize
4KB

Download
memory/3364-127-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads