asyncrat | b9ca3de39b6ff253a9683c6f32666f4882a275e4e7a9df69f4f2787373f88a77

General

Target

b9ca3de39b6ff253a9683c6f32666f4882a275e4e7a9df69f4f2787373f88a77.exe
Size

267KB
MD5

ca543a3a645d3f76aa25727b92b8596d
SHA1

93f60ad73571b2a7579e2ee888bea21e7974c47a
SHA256

b9ca3de39b6ff253a9683c6f32666f4882a275e4e7a9df69f4f2787373f88a77
SHA512

7c1cfe5218e22d325701d91dedb464964a3cbef5db04bf207854c24107dada6e216fb1f046d4e20de53387eebfcf575d51ae96ca58d9554c5e47247d636f949a
SSDEEP

3072:WdvzDqxs8ORikgogWfiuRXd3YmSffdTKXNXANewGBvskX1pWA/s8sds:WFzDqa86hV6uRRqX1evPlwAEds

Score

10^/10

asyncrat discovery persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.4.9G

C2

corporation.warzonedns.com:9341

Mutex

480-28105c055659

Attributes

delay
0
install
false
install_folder
%AppData%

aes.plain

Signatures

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

Contains code to disable Windows Defender 1 IoCs

A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

resource	yara_rule
behavioral2/memory/1104-30-0x0000000000400000-0x0000000000430000-memory.dmp	disable_win_def

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-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation	b9ca3de39b6ff253a9683c6f32666f4882a275e4e7a9df69f4f2787373f88a77.exe

Executes dropped EXE 1 IoCs

pid	Process
212	HiPatchService.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HiPatch = "C:\\Users\\Admin\\AppData\\Roaming\\HiPatch\\HiPatchService.exe"	b9ca3de39b6ff253a9683c6f32666f4882a275e4e7a9df69f4f2787373f88a77.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 212 set thread context of 1104	212	HiPatchService.exe	94

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 5 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	b9ca3de39b6ff253a9683c6f32666f4882a275e4e7a9df69f4f2787373f88a77.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	HiPatchService.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\Registry\Machine\HARDWARE\DESCRIPTION\System\CentralProcessor\0	RegAsm.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	RegAsm.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1040	timeout.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
212	HiPatchService.exe
212	HiPatchService.exe
1104	RegAsm.exe
1104	RegAsm.exe
1104	RegAsm.exe
1104	RegAsm.exe
1104	RegAsm.exe
1104	RegAsm.exe
1104	RegAsm.exe
1104	RegAsm.exe
1104	RegAsm.exe
1104	RegAsm.exe
1104	RegAsm.exe
1104	RegAsm.exe
1104	RegAsm.exe
1104	RegAsm.exe
1104	RegAsm.exe
1104	RegAsm.exe
1104	RegAsm.exe
1104	RegAsm.exe
1104	RegAsm.exe
1104	RegAsm.exe
1104	RegAsm.exe
1104	RegAsm.exe
1104	RegAsm.exe
1104	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	212	HiPatchService.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 3456 wrote to memory of 212	3456	b9ca3de39b6ff253a9683c6f32666f4882a275e4e7a9df69f4f2787373f88a77.exe	87
PID 3456 wrote to memory of 212	3456	b9ca3de39b6ff253a9683c6f32666f4882a275e4e7a9df69f4f2787373f88a77.exe	87
PID 3456 wrote to memory of 212	3456	b9ca3de39b6ff253a9683c6f32666f4882a275e4e7a9df69f4f2787373f88a77.exe	87
PID 3456 wrote to memory of 3248	3456	b9ca3de39b6ff253a9683c6f32666f4882a275e4e7a9df69f4f2787373f88a77.exe	88
PID 3456 wrote to memory of 3248	3456	b9ca3de39b6ff253a9683c6f32666f4882a275e4e7a9df69f4f2787373f88a77.exe	88
PID 3456 wrote to memory of 3248	3456	b9ca3de39b6ff253a9683c6f32666f4882a275e4e7a9df69f4f2787373f88a77.exe	88
PID 3248 wrote to memory of 1040	3248	cmd.exe	90
PID 3248 wrote to memory of 1040	3248	cmd.exe	90
PID 3248 wrote to memory of 1040	3248	cmd.exe	90
PID 212 wrote to memory of 3440	212	HiPatchService.exe	93
PID 212 wrote to memory of 3440	212	HiPatchService.exe	93
PID 212 wrote to memory of 3440	212	HiPatchService.exe	93
PID 212 wrote to memory of 1104	212	HiPatchService.exe	94
PID 212 wrote to memory of 1104	212	HiPatchService.exe	94
PID 212 wrote to memory of 1104	212	HiPatchService.exe	94
PID 212 wrote to memory of 1104	212	HiPatchService.exe	94
PID 212 wrote to memory of 1104	212	HiPatchService.exe	94
PID 212 wrote to memory of 1104	212	HiPatchService.exe	94
PID 212 wrote to memory of 1104	212	HiPatchService.exe	94
PID 212 wrote to memory of 1104	212	HiPatchService.exe	94

C:\Users\Admin\AppData\Local\Temp\b9ca3de39b6ff253a9683c6f32666f4882a275e4e7a9df69f4f2787373f88a77.exe
"C:\Users\Admin\AppData\Local\Temp\b9ca3de39b6ff253a9683c6f32666f4882a275e4e7a9df69f4f2787373f88a77.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3456
- C:\Users\Admin\AppData\Roaming\HiPatch\HiPatchService.exe
  "C:\Users\Admin\AppData\Roaming\HiPatch\HiPatchService.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:212
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
    3⤵
    PID:3440
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Checks processor information in registry
    - Suspicious behavior: EnumeratesProcesses
    PID:1104
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\HiPatch\HiPatchService.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3248
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 180
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1040

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:1524

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

3

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\HiPatch\HiPatchService.bat

Filesize
213B

MD5
0955cb4b691d44b37f8b6fad48a33b8e

SHA1
9dae759ae014cc124ab6eed7c8035788c124ae4a

SHA256
9092dbb1ca1767d1966b7f79349dd95a802a68248251bf070c0f1d74d5681d71

SHA512
08b868a028c1e8d29ed643416850df16f58d44668f9193b46bd3934965e5617a0a4015fc52815c5456023dbde01023450d295b76d936a936f26b602e764b0235

Download Submit
C:\Users\Admin\AppData\Roaming\HiPatch\HiPatchService.exe

Filesize
267KB

MD5
94666f3e4f1863f2f1f081370ef51905

SHA1
4ac18bfcb138f6b4fa4acf404c0b86e000633400

SHA256
80a4f600acb923e82d74a2f5823484fc3df69aa64165dcaa96593699ade267d0

SHA512
0ace3cc7d3ade3cfed9a8175c9e5e711576b7d3b84c44ea8108dd0508ab6130454e24669e9c06680396a29a5c2afdd4bae5d3bd12aacae017ef6d1cbd8f8cc0c

Download Submit
memory/212-27-0x0000000075370000-0x0000000075B20000-memory.dmp

Filesize
7.7MB

Download
memory/212-32-0x0000000075370000-0x0000000075B20000-memory.dmp

Filesize
7.7MB

Download
memory/212-29-0x0000000075370000-0x0000000075B20000-memory.dmp

Filesize
7.7MB

Download
memory/1104-30-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/3456-25-0x0000000075370000-0x0000000075B20000-memory.dmp

Filesize
7.7MB

Download
memory/3456-2-0x0000000005C90000-0x0000000006234000-memory.dmp

Filesize
5.6MB

Download
memory/3456-26-0x0000000075370000-0x0000000075B20000-memory.dmp

Filesize
7.7MB

Download
memory/3456-10-0x000000007537E000-0x000000007537F000-memory.dmp

Filesize
4KB

Download
memory/3456-6-0x0000000005700000-0x000000000570A000-memory.dmp

Filesize
40KB

Download
memory/3456-0-0x000000007537E000-0x000000007537F000-memory.dmp

Filesize
4KB

Download
memory/3456-1-0x0000000000CC0000-0x0000000000D06000-memory.dmp

Filesize
280KB

Download
memory/3456-4-0x0000000075370000-0x0000000075B20000-memory.dmp

Filesize
7.7MB

Download
memory/3456-5-0x0000000005710000-0x000000000571A000-memory.dmp

Filesize
40KB

Download
memory/3456-3-0x0000000005780000-0x0000000005812000-memory.dmp

Filesize
584KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads