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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2900 set thread context of 2972	2900	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe	103

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

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

pid	Process
736	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2900	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe
2900	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe
2900	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe
2900	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2900	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2900 wrote to memory of 736	2900	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe	100
PID 2900 wrote to memory of 736	2900	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe	100
PID 2900 wrote to memory of 736	2900	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe	100
PID 2900 wrote to memory of 4816	2900	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe	102
PID 2900 wrote to memory of 4816	2900	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe	102
PID 2900 wrote to memory of 4816	2900	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe	102
PID 2900 wrote to memory of 2972	2900	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe	103
PID 2900 wrote to memory of 2972	2900	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe	103
PID 2900 wrote to memory of 2972	2900	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe	103
PID 2900 wrote to memory of 2972	2900	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe	103
PID 2900 wrote to memory of 2972	2900	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe	103
PID 2900 wrote to memory of 2972	2900	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe	103
PID 2900 wrote to memory of 2972	2900	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe	103
PID 2900 wrote to memory of 2972	2900	3c84eb6288d0e34439ff33bf52446d8d24651f57d1da51e1dd0de3c9a8e3b9ca.exe	103

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:2900
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\yywxphKidVZnL" /XML "C:\Users\Admin\AppData\Local\Temp\tmp6131.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:736
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
  2⤵
  PID:4816
- 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:2972

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/2900-8-0x00000000749DE000-0x00000000749DF000-memory.dmp

Filesize
4KB

Download
memory/2900-6-0x00000000055D0000-0x00000000055E6000-memory.dmp

Filesize
88KB

Download
memory/2900-2-0x00000000055F0000-0x0000000005B94000-memory.dmp

Filesize
5.6MB

Download
memory/2900-3-0x00000000050E0000-0x0000000005172000-memory.dmp

Filesize
584KB

Download
memory/2900-0-0x00000000749DE000-0x00000000749DF000-memory.dmp

Filesize
4KB

Download
memory/2900-5-0x00000000749D0000-0x0000000075180000-memory.dmp

Filesize
7.7MB

Download
memory/2900-1-0x0000000000730000-0x00000000007B2000-memory.dmp

Filesize
520KB

Download
memory/2900-7-0x00000000067B0000-0x000000000684C000-memory.dmp

Filesize
624KB

Download
memory/2900-4-0x0000000005090000-0x000000000509A000-memory.dmp

Filesize
40KB

Download
memory/2900-9-0x00000000749D0000-0x0000000075180000-memory.dmp

Filesize
7.7MB

Download
memory/2900-10-0x0000000000CA0000-0x0000000000CD6000-memory.dmp

Filesize
216KB

Download
memory/2900-19-0x00000000749D0000-0x0000000075180000-memory.dmp

Filesize
7.7MB

Download
memory/2972-16-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2972-18-0x00000000749D0000-0x0000000075180000-memory.dmp

Filesize
7.7MB

Download
memory/2972-20-0x00000000749D0000-0x0000000075180000-memory.dmp

Filesize
7.7MB

Download
memory/2972-21-0x00000000749D0000-0x0000000075180000-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