asyncrat | 4b5cc1e99d28651fbb693422c5d392c5d47dfa61c8ec4995197706de5cb3442a

General

Target

Drawingspec.scr.exe
Size

941KB
MD5

3a43f4d6c1ce25bc8efe548fa2b16bc7
SHA1

e0b8080d2c241ee9c8d7d31adb6ecc0fc43d0a0e
SHA256

4b5cc1e99d28651fbb693422c5d392c5d47dfa61c8ec4995197706de5cb3442a
SHA512

3613b2af89545273fb21c09889e02e477d86ac2e3f313fec2a28fb68c9e94b39b3160b26d7637dce1e5053808ffe14cb0aad9dd0c404bbd6d4c8d7ea897e8072
SSDEEP

24576:uu6J33O0c+JY5UZ+XC0kGso6FauSnJzxWY:gu0c++OCvkGs9FauSaY

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

69.174.100.131:6606

Mutex

abkZfsCYRZhk

Attributes

delay
10
install
false
install_file
order.exe
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

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\unfatigued.vbs	unfatigued.exe

Executes dropped EXE 1 IoCs

pid	Process
2108	unfatigued.exe

Loads dropped DLL 1 IoCs

pid	Process
2932	Drawingspec.scr.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/files/0x0008000000016dc0-8.dat	autoit_exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2108 set thread context of 2320	2108	unfatigued.exe	31

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	RegSvcs.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Drawingspec.scr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	unfatigued.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2108	unfatigued.exe

Suspicious use of FindShellTrayWindow 4 IoCs

pid	Process
2932	Drawingspec.scr.exe
2932	Drawingspec.scr.exe
2108	unfatigued.exe
2108	unfatigued.exe

Suspicious use of SendNotifyMessage 4 IoCs

pid	Process
2932	Drawingspec.scr.exe
2932	Drawingspec.scr.exe
2108	unfatigued.exe
2108	unfatigued.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2932 wrote to memory of 2108	2932	Drawingspec.scr.exe	30
PID 2932 wrote to memory of 2108	2932	Drawingspec.scr.exe	30
PID 2932 wrote to memory of 2108	2932	Drawingspec.scr.exe	30
PID 2932 wrote to memory of 2108	2932	Drawingspec.scr.exe	30
PID 2108 wrote to memory of 2320	2108	unfatigued.exe	31
PID 2108 wrote to memory of 2320	2108	unfatigued.exe	31
PID 2108 wrote to memory of 2320	2108	unfatigued.exe	31
PID 2108 wrote to memory of 2320	2108	unfatigued.exe	31
PID 2108 wrote to memory of 2320	2108	unfatigued.exe	31
PID 2108 wrote to memory of 2320	2108	unfatigued.exe	31
PID 2108 wrote to memory of 2320	2108	unfatigued.exe	31
PID 2108 wrote to memory of 2320	2108	unfatigued.exe	31

C:\Users\Admin\AppData\Local\Temp\Drawingspec.scr.exe
"C:\Users\Admin\AppData\Local\Temp\Drawingspec.scr.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:2932
- C:\Users\Admin\AppData\Local\iodite\unfatigued.exe
  "C:\Users\Admin\AppData\Local\Temp\Drawingspec.scr.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2108
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
    "C:\Users\Admin\AppData\Local\Temp\Drawingspec.scr.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2320

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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

C:\Users\Admin\AppData\Local\Temp\intersentimental

Filesize
45KB

MD5
064c06ce3704ac5ce2d8efeb296a9422

SHA1
dcc706429d796903bcd7e77d41e5981beff878f4

SHA256
819cc43386c4eb72d4ae4e4edcf9eb5f0a654dfe3b56b45c5f9a9d553bc9cc82

SHA512
423fda98347db0f083a74c758b8526119a87e0944a067503d380c504e3ad9a341c122f721f86bb75bb9aa2f1017d4bad6c298bcbcc98e8fb1dcef722919205de

Download Submit
\Users\Admin\AppData\Local\iodite\unfatigued.exe

Filesize
941KB

MD5
3a43f4d6c1ce25bc8efe548fa2b16bc7

SHA1
e0b8080d2c241ee9c8d7d31adb6ecc0fc43d0a0e

SHA256
4b5cc1e99d28651fbb693422c5d392c5d47dfa61c8ec4995197706de5cb3442a

SHA512
3613b2af89545273fb21c09889e02e477d86ac2e3f313fec2a28fb68c9e94b39b3160b26d7637dce1e5053808ffe14cb0aad9dd0c404bbd6d4c8d7ea897e8072

Download Submit
memory/2108-20-0x0000000000890000-0x0000000000C90000-memory.dmp

Filesize
4.0MB

Download
memory/2320-22-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2320-26-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2320-24-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2320-27-0x000000007459E000-0x000000007459F000-memory.dmp

Filesize
4KB

Download
memory/2320-28-0x000000007459E000-0x000000007459F000-memory.dmp

Filesize
4KB

Download
memory/2320-29-0x0000000074590000-0x0000000074C7E000-memory.dmp

Filesize
6.9MB

Download
memory/2320-30-0x0000000074590000-0x0000000074C7E000-memory.dmp

Filesize
6.9MB

Download
memory/2932-6-0x0000000000BA0000-0x0000000000FA0000-memory.dmp

Filesize
4.0MB

Download

Analysis

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