asyncrat | eab4fe7ae2bdc9c93bc0e0ebdfb68f9652668fed5cef1a42e6b1d17d6d615fff

General

Target

8c5112555e12edf1ce3182566b0ffa80N.exe
Size

267KB
MD5

8c5112555e12edf1ce3182566b0ffa80
SHA1

abd569a522865b42cd76193896d9155b9a5b2c14
SHA256

eab4fe7ae2bdc9c93bc0e0ebdfb68f9652668fed5cef1a42e6b1d17d6d615fff
SHA512

a817f227c5aa3f060823a8dfe09a83bffd733349929eabc7e8af9e17e8f01d17cf45dbebf4b22ad82061e92b5af26ea8238f0ebf6baf8ce0bec3b8f5bc0ada28
SSDEEP

3072:WdvzDqxs8ORikgogWfiuRXd3YmSffdTKXNXANewGBvskX1pWA/k:WFzDqa86hV6uRRqX1evPlwAs

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/2432-28-0x0000000000400000-0x0000000000430000-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	8c5112555e12edf1ce3182566b0ffa80N.exe

Executes dropped EXE 1 IoCs

pid	Process
4692	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"	8c5112555e12edf1ce3182566b0ffa80N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4692 set thread context of 2432	4692	HiPatchService.exe	100

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	8c5112555e12edf1ce3182566b0ffa80N.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
3512	timeout.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
2432	RegAsm.exe
2432	RegAsm.exe
2432	RegAsm.exe
2432	RegAsm.exe
2432	RegAsm.exe
2432	RegAsm.exe
2432	RegAsm.exe
2432	RegAsm.exe
2432	RegAsm.exe
2432	RegAsm.exe
2432	RegAsm.exe
2432	RegAsm.exe
2432	RegAsm.exe
2432	RegAsm.exe
2432	RegAsm.exe
2432	RegAsm.exe
2432	RegAsm.exe
2432	RegAsm.exe
2432	RegAsm.exe
2432	RegAsm.exe
2432	RegAsm.exe
2432	RegAsm.exe
2432	RegAsm.exe
2432	RegAsm.exe
2432	RegAsm.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 1260 wrote to memory of 4692	1260	8c5112555e12edf1ce3182566b0ffa80N.exe	95
PID 1260 wrote to memory of 4692	1260	8c5112555e12edf1ce3182566b0ffa80N.exe	95
PID 1260 wrote to memory of 4692	1260	8c5112555e12edf1ce3182566b0ffa80N.exe	95
PID 1260 wrote to memory of 2536	1260	8c5112555e12edf1ce3182566b0ffa80N.exe	96
PID 1260 wrote to memory of 2536	1260	8c5112555e12edf1ce3182566b0ffa80N.exe	96
PID 1260 wrote to memory of 2536	1260	8c5112555e12edf1ce3182566b0ffa80N.exe	96
PID 2536 wrote to memory of 3512	2536	cmd.exe	98
PID 2536 wrote to memory of 3512	2536	cmd.exe	98
PID 2536 wrote to memory of 3512	2536	cmd.exe	98
PID 4692 wrote to memory of 2432	4692	HiPatchService.exe	100
PID 4692 wrote to memory of 2432	4692	HiPatchService.exe	100
PID 4692 wrote to memory of 2432	4692	HiPatchService.exe	100
PID 4692 wrote to memory of 2432	4692	HiPatchService.exe	100
PID 4692 wrote to memory of 2432	4692	HiPatchService.exe	100
PID 4692 wrote to memory of 2432	4692	HiPatchService.exe	100
PID 4692 wrote to memory of 2432	4692	HiPatchService.exe	100
PID 4692 wrote to memory of 2432	4692	HiPatchService.exe	100

C:\Users\Admin\AppData\Local\Temp\8c5112555e12edf1ce3182566b0ffa80N.exe
"C:\Users\Admin\AppData\Local\Temp\8c5112555e12edf1ce3182566b0ffa80N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1260
- 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:4692
- - 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:2432
- 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:2536
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 180
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3512

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:4732

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
267KB

MD5
bd2603d2026e2b044080a9747eafb2c0

SHA1
cda9bd511c614e47bffe19c6e48e18697afaa2db

SHA256
60c2da5355ac7da6e10708ff60e8fb8f08da433a7c409380b462e80ab4242d04

SHA512
31a31a00728c35f314644455c4d4580644a37755167a806c1cb34943c11e1f88d4493dce804c265ec176eeba3ca2cc4c0b4f9bee5466cde8588b70d7a97672df

Download Submit
memory/1260-6-0x0000000075360000-0x0000000075B10000-memory.dmp

Filesize
7.7MB

Download
memory/1260-3-0x0000000005440000-0x00000000054D2000-memory.dmp

Filesize
584KB

Download
memory/1260-4-0x00000000053B0000-0x00000000053BA000-memory.dmp

Filesize
40KB

Download
memory/1260-5-0x00000000053A0000-0x00000000053AA000-memory.dmp

Filesize
40KB

Download
memory/1260-0-0x000000007536E000-0x000000007536F000-memory.dmp

Filesize
4KB

Download
memory/1260-2-0x00000000059F0000-0x0000000005F94000-memory.dmp

Filesize
5.6MB

Download
memory/1260-25-0x0000000075360000-0x0000000075B10000-memory.dmp

Filesize
7.7MB

Download
memory/1260-1-0x0000000000970000-0x00000000009B6000-memory.dmp

Filesize
280KB

Download
memory/2432-28-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/4692-24-0x0000000075360000-0x0000000075B10000-memory.dmp

Filesize
7.7MB

Download
memory/4692-27-0x0000000075360000-0x0000000075B10000-memory.dmp

Filesize
7.7MB

Download
memory/4692-30-0x0000000075360000-0x0000000075B10000-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