asyncrat | 4724db8a3fcb7b6fb2fcf38db1267514c1f16cb6d1b747d6d1b1710509c709ba

General

Target

b1d13a3d1d3fa5786cb1b48d3aa64e90N.exe
Size

266KB
MD5

b1d13a3d1d3fa5786cb1b48d3aa64e90
SHA1

001d109341ce43ec309910afbb84cf1644fc8460
SHA256

4724db8a3fcb7b6fb2fcf38db1267514c1f16cb6d1b747d6d1b1710509c709ba
SHA512

077f9f9cbc9800f560fa968976b588c80e235745db3395995eaf533c80e2daa7fc8cedf7bc631a7b455caa01ba7f019b8d9f1a05c7d18520741c7468f8f95c68
SSDEEP

3072:WdvzDqxs8ORikgogWfiuRXd3YmSffdTKXNXANewGBvskX1pWA/r:WFzDqa86hV6uRRqX1evPlwAD

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/1944-30-0x0000000000400000-0x0000000000430000-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-1-5-21-656926755-4116854191-210765258-1000\Control Panel\International\Geo\Nation	b1d13a3d1d3fa5786cb1b48d3aa64e90N.exe

Executes dropped EXE 1 IoCs

pid	Process
4768	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-1-5-21-656926755-4116854191-210765258-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HiPatch = "C:\\Users\\Admin\\AppData\\Roaming\\HiPatch\\HiPatchService.exe"	b1d13a3d1d3fa5786cb1b48d3aa64e90N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4768 set thread context of 1944	4768	HiPatchService.exe	102

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	b1d13a3d1d3fa5786cb1b48d3aa64e90N.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
4292	timeout.exe

Suspicious behavior: EnumeratesProcesses 27 IoCs

pid	Process
4768	HiPatchService.exe
4768	HiPatchService.exe
1944	RegAsm.exe
1944	RegAsm.exe
1944	RegAsm.exe
1944	RegAsm.exe
1944	RegAsm.exe
1944	RegAsm.exe
1944	RegAsm.exe
1944	RegAsm.exe
1944	RegAsm.exe
1944	RegAsm.exe
1944	RegAsm.exe
1944	RegAsm.exe
1944	RegAsm.exe
1944	RegAsm.exe
1944	RegAsm.exe
1944	RegAsm.exe
1944	RegAsm.exe
1944	RegAsm.exe
1944	RegAsm.exe
1944	RegAsm.exe
1944	RegAsm.exe
1944	RegAsm.exe
1944	RegAsm.exe
1944	RegAsm.exe
1944	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4768	HiPatchService.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2992 wrote to memory of 4768	2992	b1d13a3d1d3fa5786cb1b48d3aa64e90N.exe	95
PID 2992 wrote to memory of 4768	2992	b1d13a3d1d3fa5786cb1b48d3aa64e90N.exe	95
PID 2992 wrote to memory of 4768	2992	b1d13a3d1d3fa5786cb1b48d3aa64e90N.exe	95
PID 2992 wrote to memory of 4480	2992	b1d13a3d1d3fa5786cb1b48d3aa64e90N.exe	96
PID 2992 wrote to memory of 4480	2992	b1d13a3d1d3fa5786cb1b48d3aa64e90N.exe	96
PID 2992 wrote to memory of 4480	2992	b1d13a3d1d3fa5786cb1b48d3aa64e90N.exe	96
PID 4480 wrote to memory of 4292	4480	cmd.exe	98
PID 4480 wrote to memory of 4292	4480	cmd.exe	98
PID 4480 wrote to memory of 4292	4480	cmd.exe	98
PID 4768 wrote to memory of 624	4768	HiPatchService.exe	101
PID 4768 wrote to memory of 624	4768	HiPatchService.exe	101
PID 4768 wrote to memory of 624	4768	HiPatchService.exe	101
PID 4768 wrote to memory of 1944	4768	HiPatchService.exe	102
PID 4768 wrote to memory of 1944	4768	HiPatchService.exe	102
PID 4768 wrote to memory of 1944	4768	HiPatchService.exe	102
PID 4768 wrote to memory of 1944	4768	HiPatchService.exe	102
PID 4768 wrote to memory of 1944	4768	HiPatchService.exe	102
PID 4768 wrote to memory of 1944	4768	HiPatchService.exe	102
PID 4768 wrote to memory of 1944	4768	HiPatchService.exe	102
PID 4768 wrote to memory of 1944	4768	HiPatchService.exe	102

C:\Users\Admin\AppData\Local\Temp\b1d13a3d1d3fa5786cb1b48d3aa64e90N.exe
"C:\Users\Admin\AppData\Local\Temp\b1d13a3d1d3fa5786cb1b48d3aa64e90N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2992
- 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:4768
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
    3⤵
    PID:624
- - 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:1944
- 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:4480
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 180
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4292

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:380

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

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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
266KB

MD5
4e4fd1382b3f706412cb5ad0354a98ac

SHA1
a42ca7be91634d470ac5cc6cc0d7e46402967f50

SHA256
140fbac959267fe4e708772e343e92c3f366174737ad9ed37bd4f32be809375b

SHA512
bcb8fe252c6c5bed846d947c7c22bdf5fb985089794486a2fb12db2d32471ce244219a68e6c09fa820325ca9edae1f4c78a59c5403f204944b6e34dca8f4ceed

Download Submit
memory/1944-30-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2992-25-0x00000000743E0000-0x0000000074B90000-memory.dmp

Filesize
7.7MB

Download
memory/2992-4-0x00000000743E0000-0x0000000074B90000-memory.dmp

Filesize
7.7MB

Download
memory/2992-5-0x0000000005490000-0x000000000549A000-memory.dmp

Filesize
40KB

Download
memory/2992-6-0x0000000005480000-0x000000000548A000-memory.dmp

Filesize
40KB

Download
memory/2992-2-0x00000000057C0000-0x0000000005D64000-memory.dmp

Filesize
5.6MB

Download
memory/2992-0-0x00000000743EE000-0x00000000743EF000-memory.dmp

Filesize
4KB

Download
memory/2992-10-0x00000000743EE000-0x00000000743EF000-memory.dmp

Filesize
4KB

Download
memory/2992-26-0x00000000743E0000-0x0000000074B90000-memory.dmp

Filesize
7.7MB

Download
memory/2992-1-0x00000000008A0000-0x00000000008E6000-memory.dmp

Filesize
280KB

Download
memory/2992-3-0x00000000052F0000-0x0000000005382000-memory.dmp

Filesize
584KB

Download
memory/4768-27-0x00000000743E0000-0x0000000074B90000-memory.dmp

Filesize
7.7MB

Download
memory/4768-29-0x00000000743E0000-0x0000000074B90000-memory.dmp

Filesize
7.7MB

Download
memory/4768-32-0x00000000743E0000-0x0000000074B90000-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