asyncrat | 3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca

General

Target

3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe
Size

491KB
MD5

12d200d7d82b3c47cd702cb09f7424fa
SHA1

2da9a07a081dcd9cf68bfebf39ab6ca0a22bae76
SHA256

3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca
SHA512

b418ca46bfe47eee7b8c5da29d0a80113c6264ba282e4c78783e870fc241ab431cb8427a2723f63a9749cd2b766405acf997c85501e4a18f17484d40c3f4f8c5
SSDEEP

12288:byrjnZPxkyx8gmoYSZtIEOZU8HocYnKrTSOk:baPx9dtIEOZU+ochGD

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

C2

202.55.133.118:5200

Mutex

DcRatMutex_qwqdanchun

Attributes

delay
1
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

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

Processes:

3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe

description	pid	process	target process
PID 2220 set thread context of 4500	2220	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe	RegSvcs.exe

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 3 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

Processes:

3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exeRegSvcs.exeschtasks.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegSvcs.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence execution

Scheduled Task
T1053.005

Processes:

schtasks.exe

pid process

3912 schtasks.exe

pid	process
3912	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe

pid	process
2220	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe
2220	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe

description pid process

Token: SeDebugPrivilege 2220 3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe

description	pid	process
Token: SeDebugPrivilege	2220	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe

description	pid	process	target process
PID 2220 wrote to memory of 3912	2220	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe	schtasks.exe
PID 2220 wrote to memory of 3912	2220	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe	schtasks.exe
PID 2220 wrote to memory of 3912	2220	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe	schtasks.exe
PID 2220 wrote to memory of 4500	2220	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe	RegSvcs.exe
PID 2220 wrote to memory of 4500	2220	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe	RegSvcs.exe
PID 2220 wrote to memory of 4500	2220	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe	RegSvcs.exe
PID 2220 wrote to memory of 4500	2220	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe	RegSvcs.exe
PID 2220 wrote to memory of 4500	2220	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe	RegSvcs.exe
PID 2220 wrote to memory of 4500	2220	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe	RegSvcs.exe
PID 2220 wrote to memory of 4500	2220	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe	RegSvcs.exe
PID 2220 wrote to memory of 4500	2220	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe	RegSvcs.exe

C:\Users\Admin\AppData\Local\Temp\3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe
"C:\Users\Admin\AppData\Local\Temp\3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2220
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\yywxphKidVZnL" /XML "C:\Users\Admin\AppData\Local\Temp\tmp333B.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:3912
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4500

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2220-8-0x00000000747EE000-0x00000000747EF000-memory.dmp

Filesize
4KB

Download
memory/2220-6-0x0000000005180000-0x0000000005196000-memory.dmp

Filesize
88KB

Download
memory/2220-2-0x0000000005190000-0x0000000005734000-memory.dmp

Filesize
5.6MB

Download
memory/2220-3-0x0000000004CC0000-0x0000000004D52000-memory.dmp

Filesize
584KB

Download
memory/2220-0-0x00000000747EE000-0x00000000747EF000-memory.dmp

Filesize
4KB

Download
memory/2220-5-0x00000000747E0000-0x0000000074F90000-memory.dmp

Filesize
7.7MB

Download
memory/2220-1-0x0000000000390000-0x0000000000412000-memory.dmp

Filesize
520KB

Download
memory/2220-7-0x00000000063E0000-0x000000000647C000-memory.dmp

Filesize
624KB

Download
memory/2220-4-0x0000000004E80000-0x0000000004E8A000-memory.dmp

Filesize
40KB

Download
memory/2220-9-0x00000000747E0000-0x0000000074F90000-memory.dmp

Filesize
7.7MB

Download
memory/2220-10-0x0000000000B80000-0x0000000000BB6000-memory.dmp

Filesize
216KB

Download
memory/2220-19-0x00000000747E0000-0x0000000074F90000-memory.dmp

Filesize
7.7MB

Download
memory/4500-18-0x00000000747E0000-0x0000000074F90000-memory.dmp

Filesize
7.7MB

Download
memory/4500-16-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/4500-20-0x00000000747E0000-0x0000000074F90000-memory.dmp

Filesize
7.7MB

Download
memory/4500-21-0x00000000747E0000-0x0000000074F90000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads