asyncrat | 9a8f8b44910d4c35a64244354966ce7bdd3bdff9189feee1d8e98b094c855138

General

Target
Launcher.exe
Size 309KB
Sample230321-c76e4aae61
SHA256 9a8f8b44910d4c35a64244354966ce7bdd3bdff9189feee1d8e98b094c855138
MD5 66b5dabec55deb65ac6ecdbb385c9181
SHA1 8485dc1ecf501916e3850521e81112fccdfaa110
SHA512 28ff7068f0d8c1d7e0de8a6129d64db7d566868dc93e9bb8ba4de737d11483f8dd52edc6f67799cdf3396109061835bce472a2123477bb9304f1ff902ffdffb8
SSDEEP 3072:WHuQETR+J2IoYcOXb/CPJDjSIU1dA+h9b3dA2/S1dAK3dA/Sf6CwCPuikC0oXz2T:ouQ1MIPXXbaQIDp5OqfO
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

127.0.0.1:6606
127.0.0.1:7707
127.0.0.1:8808
127.0.0.1:1177
jntrojan.ddns.net:6606
jntrojan.ddns.net:7707
jntrojan.ddns.net:8808
jntrojan.ddns.net:1177

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
windows.exe
install_folder
%Temp%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Async RAT payload 3 IoCs

rat

resource	yara_rule
behavioral2/memory/736-133-0x00000000003E0000-0x0000000000434000-memory.dmp	asyncrat
behavioral2/files/0x000a0000000230dd-142.dat	asyncrat
behavioral2/files/0x000a0000000230dd-143.dat	asyncrat

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\International\Geo\Nation	Launcher.exe

Executes dropped EXE 1 IoCs

pid	Process
4808	windows.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
3500	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
536	timeout.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
736	Launcher.exe
736	Launcher.exe
736	Launcher.exe
736	Launcher.exe
736	Launcher.exe
736	Launcher.exe
736	Launcher.exe
736	Launcher.exe
736	Launcher.exe
736	Launcher.exe
736	Launcher.exe
736	Launcher.exe
736	Launcher.exe
736	Launcher.exe
736	Launcher.exe
736	Launcher.exe
736	Launcher.exe
736	Launcher.exe
736	Launcher.exe
736	Launcher.exe
736	Launcher.exe
736	Launcher.exe
736	Launcher.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	736	Launcher.exe
Token: SeDebugPrivilege	4808	windows.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 736 wrote to memory of 5024	736	Launcher.exe	90
PID 736 wrote to memory of 5024	736	Launcher.exe	90
PID 736 wrote to memory of 5024	736	Launcher.exe	90
PID 736 wrote to memory of 4816	736	Launcher.exe	92
PID 736 wrote to memory of 4816	736	Launcher.exe	92
PID 736 wrote to memory of 4816	736	Launcher.exe	92
PID 5024 wrote to memory of 3500	5024	cmd.exe	94
PID 5024 wrote to memory of 3500	5024	cmd.exe	94
PID 5024 wrote to memory of 3500	5024	cmd.exe	94
PID 4816 wrote to memory of 536	4816	cmd.exe	95
PID 4816 wrote to memory of 536	4816	cmd.exe	95
PID 4816 wrote to memory of 536	4816	cmd.exe	95
PID 4816 wrote to memory of 4808	4816	cmd.exe	97
PID 4816 wrote to memory of 4808	4816	cmd.exe	97
PID 4816 wrote to memory of 4808	4816	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\Launcher.exe
"C:\Users\Admin\AppData\Local\Temp\Launcher.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:736
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "windows" /tr '"C:\Users\Admin\AppData\Local\Temp\windows.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:5024
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "windows" /tr '"C:\Users\Admin\AppData\Local\Temp\windows.exe"'
    3⤵
    - Creates scheduled task(s)
    PID:3500
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp86C.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4816
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:536
- - C:\Users\Admin\AppData\Local\Temp\windows.exe
    "C:\Users\Admin\AppData\Local\Temp\windows.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:4808

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

tmp86C.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp86C.tmp.bat
Size 153B
SHA256 16fe3142685d48f78ba19f57a4424bfc7f755754e4d094e2c15a8d27f7edbec0
MD5 551e098f5dba2ba686203fac0074e6b4
SHA1 5cdf20379cb8d89f4df0944e50e97366f1028aba
SHA512 741a7765993244ed8a4f58a248c5f9b73dfa4f243e9b323d479dc3d35808c9acea066b2f233e1bbda4f29289d1b8ba9bd3612339763fe7963f891bf1060914c8
MD5 SHA1 SHA512

Submit Download

windows.exe

Path C:\Users\Admin\AppData\Local\Temp\windows.exe
Size 309KB
SHA256 9a8f8b44910d4c35a64244354966ce7bdd3bdff9189feee1d8e98b094c855138
MD5 66b5dabec55deb65ac6ecdbb385c9181
SHA1 8485dc1ecf501916e3850521e81112fccdfaa110
SHA512 28ff7068f0d8c1d7e0de8a6129d64db7d566868dc93e9bb8ba4de737d11483f8dd52edc6f67799cdf3396109061835bce472a2123477bb9304f1ff902ffdffb8
SSDEEP 3072:WHuQETR+J2IoYcOXb/CPJDjSIU1dA+h9b3dA2/S1dAK3dA/Sf6CwCPuikC0oXz2T:ouQ1MIPXXbaQIDp5OqfO
MD5 SHA1 SHA512 SSDEEP

Submit Download

windows.exe

Path C:\Users\Admin\AppData\Local\Temp\windows.exe
Size 309KB
SHA256 9a8f8b44910d4c35a64244354966ce7bdd3bdff9189feee1d8e98b094c855138
MD5 66b5dabec55deb65ac6ecdbb385c9181
SHA1 8485dc1ecf501916e3850521e81112fccdfaa110
SHA512 28ff7068f0d8c1d7e0de8a6129d64db7d566868dc93e9bb8ba4de737d11483f8dd52edc6f67799cdf3396109061835bce472a2123477bb9304f1ff902ffdffb8
SSDEEP 3072:WHuQETR+J2IoYcOXb/CPJDjSIU1dA+h9b3dA2/S1dAK3dA/Sf6CwCPuikC0oXz2T:ouQ1MIPXXbaQIDp5OqfO
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/736-133-0x00000000003E0000-0x0000000000434000-memory.dmp

Download

memory/736-134-0x0000000004D20000-0x0000000004D30000-memory.dmp

Download

memory/736-135-0x0000000005030000-0x00000000050CC000-memory.dmp

Download

memory/4808-144-0x0000000002C30000-0x0000000002C40000-memory.dmp

Download

memory/4808-145-0x0000000002C30000-0x0000000002C40000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads