asyncrat | b27b495830a306373ee17db6cee4fea5b837d6610bd0d2d5702efa6260b86991

General

Target

55b4619d5fbcd3a08f985990a4a6f720N.exe
Size

267KB
MD5

55b4619d5fbcd3a08f985990a4a6f720
SHA1

9a35dab7ac19ef221e3c191054ee96bbf85022aa
SHA256

b27b495830a306373ee17db6cee4fea5b837d6610bd0d2d5702efa6260b86991
SHA512

1d920ebdb736dbdefb0a709638a3a3c006b3cfd501db9aba4e36ce71310b463bb068982173adc5ee9b5fab62205fd23a710d5f8a8fd218e18b64fcdce2ac650a
SSDEEP

3072:WdvzDqxs8ORikgogWfiuRXd3YmSffdTKXNXANewGBvskX1pWA/u:WFzDqa86hV6uRRqX1evPlwAG

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 5 IoCs

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

resource	yara_rule
behavioral1/memory/2612-31-0x0000000000400000-0x0000000000430000-memory.dmp	disable_win_def
behavioral1/memory/2612-33-0x0000000000400000-0x0000000000430000-memory.dmp	disable_win_def
behavioral1/memory/2612-38-0x0000000000400000-0x0000000000430000-memory.dmp	disable_win_def
behavioral1/memory/2612-37-0x0000000000400000-0x0000000000430000-memory.dmp	disable_win_def
behavioral1/memory/2612-36-0x0000000000400000-0x0000000000430000-memory.dmp	disable_win_def

Executes dropped EXE 1 IoCs

pid	Process
1072	HiPatchService.exe

Loads dropped DLL 1 IoCs

pid	Process
2328	55b4619d5fbcd3a08f985990a4a6f720N.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-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Windows\CurrentVersion\Run\HiPatch = "C:\\Users\\Admin\\AppData\\Roaming\\HiPatch\\HiPatchService.exe"	55b4619d5fbcd3a08f985990a4a6f720N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1072 set thread context of 2612	1072	HiPatchService.exe	33

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 4 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	55b4619d5fbcd3a08f985990a4a6f720N.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	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
2612	RegAsm.exe
2612	RegAsm.exe
2612	RegAsm.exe
2612	RegAsm.exe
2612	RegAsm.exe
2612	RegAsm.exe
2612	RegAsm.exe
2612	RegAsm.exe
2612	RegAsm.exe
2612	RegAsm.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2328 wrote to memory of 1072	2328	55b4619d5fbcd3a08f985990a4a6f720N.exe	30
PID 2328 wrote to memory of 1072	2328	55b4619d5fbcd3a08f985990a4a6f720N.exe	30
PID 2328 wrote to memory of 1072	2328	55b4619d5fbcd3a08f985990a4a6f720N.exe	30
PID 2328 wrote to memory of 1072	2328	55b4619d5fbcd3a08f985990a4a6f720N.exe	30
PID 2328 wrote to memory of 1072	2328	55b4619d5fbcd3a08f985990a4a6f720N.exe	30
PID 2328 wrote to memory of 1072	2328	55b4619d5fbcd3a08f985990a4a6f720N.exe	30
PID 2328 wrote to memory of 1072	2328	55b4619d5fbcd3a08f985990a4a6f720N.exe	30
PID 2328 wrote to memory of 2748	2328	55b4619d5fbcd3a08f985990a4a6f720N.exe	31
PID 2328 wrote to memory of 2748	2328	55b4619d5fbcd3a08f985990a4a6f720N.exe	31
PID 2328 wrote to memory of 2748	2328	55b4619d5fbcd3a08f985990a4a6f720N.exe	31
PID 2328 wrote to memory of 2748	2328	55b4619d5fbcd3a08f985990a4a6f720N.exe	31
PID 2328 wrote to memory of 2748	2328	55b4619d5fbcd3a08f985990a4a6f720N.exe	31
PID 2328 wrote to memory of 2748	2328	55b4619d5fbcd3a08f985990a4a6f720N.exe	31
PID 2328 wrote to memory of 2748	2328	55b4619d5fbcd3a08f985990a4a6f720N.exe	31
PID 1072 wrote to memory of 2612	1072	HiPatchService.exe	33
PID 1072 wrote to memory of 2612	1072	HiPatchService.exe	33
PID 1072 wrote to memory of 2612	1072	HiPatchService.exe	33
PID 1072 wrote to memory of 2612	1072	HiPatchService.exe	33
PID 1072 wrote to memory of 2612	1072	HiPatchService.exe	33
PID 1072 wrote to memory of 2612	1072	HiPatchService.exe	33
PID 1072 wrote to memory of 2612	1072	HiPatchService.exe	33
PID 1072 wrote to memory of 2612	1072	HiPatchService.exe	33
PID 1072 wrote to memory of 2612	1072	HiPatchService.exe	33
PID 1072 wrote to memory of 2612	1072	HiPatchService.exe	33
PID 1072 wrote to memory of 2612	1072	HiPatchService.exe	33
PID 1072 wrote to memory of 2612	1072	HiPatchService.exe	33

C:\Users\Admin\AppData\Local\Temp\55b4619d5fbcd3a08f985990a4a6f720N.exe
"C:\Users\Admin\AppData\Local\Temp\55b4619d5fbcd3a08f985990a4a6f720N.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2328
- 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 use of WriteProcessMemory
  PID:1072
- - 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
    - Suspicious behavior: EnumeratesProcesses
    PID:2612
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Roaming\HiPatch\HiPatchService.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2748

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:1988

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

System Information Discovery

1

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
\Users\Admin\AppData\Roaming\HiPatch\HiPatchService.exe

Filesize
267KB

MD5
cd56340414b38ad736e5e7c2fd579a5a

SHA1
7fc4c2d1f0af4b72a4c63661ba1e2f388e917287

SHA256
5120108a68fdfb966ed0a783862389bab3264e021a3304b11104d2abe323d2ea

SHA512
b33c2214ddf53ab6d8b62be5d811afa380e9133a7a5352b9e2ebea83547ac9b2b59c9e92ce8a7d10b7e3681e90862f78cecfe44f085d55378edb983c13497103

Download Submit
memory/1072-39-0x00000000749A0000-0x000000007508E000-memory.dmp

Filesize
6.9MB

Download
memory/1072-23-0x0000000000F10000-0x0000000000F56000-memory.dmp

Filesize
280KB

Download
memory/1072-24-0x00000000749A0000-0x000000007508E000-memory.dmp

Filesize
6.9MB

Download
memory/2328-0-0x00000000749AE000-0x00000000749AF000-memory.dmp

Filesize
4KB

Download
memory/2328-3-0x00000000749A0000-0x000000007508E000-memory.dmp

Filesize
6.9MB

Download
memory/2328-2-0x0000000000250000-0x000000000025A000-memory.dmp

Filesize
40KB

Download
memory/2328-22-0x00000000749A0000-0x000000007508E000-memory.dmp

Filesize
6.9MB

Download
memory/2328-9-0x00000000749AE000-0x00000000749AF000-memory.dmp

Filesize
4KB

Download
memory/2328-25-0x00000000749A0000-0x000000007508E000-memory.dmp

Filesize
6.9MB

Download
memory/2328-1-0x00000000011D0000-0x0000000001216000-memory.dmp

Filesize
280KB

Download
memory/2612-31-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2612-33-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2612-38-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2612-27-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2612-37-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2612-36-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2612-35-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2612-30-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads