asyncrat | 4e259bb72091a51873695eab388599bf4665c0cd04363d48481ff406771fdf1b

General

Target

4e259bb72091a51873695eab388599bf4665c0cd04363d48481ff406771fdf1b.exe
Size

270KB
MD5

403f3241e5af51a4cf93a0b7945a9d06
SHA1

6f40643395723f67f6d23ddc5261dbd65e093664
SHA256

4e259bb72091a51873695eab388599bf4665c0cd04363d48481ff406771fdf1b
SHA512

5ffa76cabbcd5020f249556fc52f74b7aab328c879fbd9a38cef7a0fe6e41218fcc4e405a296492df4c8261090dbe469ee40d540c0239f65d7ae445123ce1991
SSDEEP

3072:WdvzDqxs8ORikgogWfiuRXd3YmSffdTKXNXANewGBvskX1pWA/s8sdkXF:WFzDqa86hV6uRRqX1evPlwAEdkXF

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
Asyncrat family
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/2784-29-0x0000000000400000-0x0000000000430000-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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	4e259bb72091a51873695eab388599bf4665c0cd04363d48481ff406771fdf1b.exe

Executes dropped EXE 1 IoCs

pid	Process
208	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-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HiPatch = "C:\\Users\\Admin\\AppData\\Roaming\\HiPatch\\HiPatchService.exe"	4e259bb72091a51873695eab388599bf4665c0cd04363d48481ff406771fdf1b.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 208 set thread context of 2784	208	HiPatchService.exe	95

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	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4e259bb72091a51873695eab388599bf4665c0cd04363d48481ff406771fdf1b.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

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
4976	timeout.exe

Suspicious behavior: EnumeratesProcesses 24 IoCs

pid	Process
2784	RegAsm.exe
2784	RegAsm.exe
2784	RegAsm.exe
2784	RegAsm.exe
2784	RegAsm.exe
2784	RegAsm.exe
2784	RegAsm.exe
2784	RegAsm.exe
2784	RegAsm.exe
2784	RegAsm.exe
2784	RegAsm.exe
2784	RegAsm.exe
2784	RegAsm.exe
2784	RegAsm.exe
2784	RegAsm.exe
2784	RegAsm.exe
2784	RegAsm.exe
2784	RegAsm.exe
2784	RegAsm.exe
2784	RegAsm.exe
2784	RegAsm.exe
2784	RegAsm.exe
2784	RegAsm.exe
2784	RegAsm.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 872 wrote to memory of 208	872	4e259bb72091a51873695eab388599bf4665c0cd04363d48481ff406771fdf1b.exe	84
PID 872 wrote to memory of 208	872	4e259bb72091a51873695eab388599bf4665c0cd04363d48481ff406771fdf1b.exe	84
PID 872 wrote to memory of 208	872	4e259bb72091a51873695eab388599bf4665c0cd04363d48481ff406771fdf1b.exe	84
PID 872 wrote to memory of 5084	872	4e259bb72091a51873695eab388599bf4665c0cd04363d48481ff406771fdf1b.exe	85
PID 872 wrote to memory of 5084	872	4e259bb72091a51873695eab388599bf4665c0cd04363d48481ff406771fdf1b.exe	85
PID 872 wrote to memory of 5084	872	4e259bb72091a51873695eab388599bf4665c0cd04363d48481ff406771fdf1b.exe	85
PID 5084 wrote to memory of 4976	5084	cmd.exe	87
PID 5084 wrote to memory of 4976	5084	cmd.exe	87
PID 5084 wrote to memory of 4976	5084	cmd.exe	87
PID 208 wrote to memory of 2784	208	HiPatchService.exe	95
PID 208 wrote to memory of 2784	208	HiPatchService.exe	95
PID 208 wrote to memory of 2784	208	HiPatchService.exe	95
PID 208 wrote to memory of 2784	208	HiPatchService.exe	95
PID 208 wrote to memory of 2784	208	HiPatchService.exe	95
PID 208 wrote to memory of 2784	208	HiPatchService.exe	95
PID 208 wrote to memory of 2784	208	HiPatchService.exe	95
PID 208 wrote to memory of 2784	208	HiPatchService.exe	95

C:\Users\Admin\AppData\Local\Temp\4e259bb72091a51873695eab388599bf4665c0cd04363d48481ff406771fdf1b.exe
"C:\Users\Admin\AppData\Local\Temp\4e259bb72091a51873695eab388599bf4665c0cd04363d48481ff406771fdf1b.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:872
- 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:208
- - 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:2784
- 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:5084
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 180
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4976

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:4352

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
270KB

MD5
6ae2e1917a01c7db15ee9445f76f12e4

SHA1
a469554ed303b073407b64aafcf19dfe7d426bbf

SHA256
97fce2cc8b157c73943cce263ca55b90489a5447620f35dd15decc0c7a950602

SHA512
e532151bb16df0c28abb20f5b2ccb8e88ee924fbd814b468992b1fbe2fa997c893a80b4446a13811cf1a0cfbd13396d6f595e026d99853fef5649070612612ed

Download Submit
memory/208-31-0x0000000074CA0000-0x0000000075450000-memory.dmp

Filesize
7.7MB

Download
memory/208-27-0x0000000074CA0000-0x0000000075450000-memory.dmp

Filesize
7.7MB

Download
memory/208-26-0x0000000074CA0000-0x0000000075450000-memory.dmp

Filesize
7.7MB

Download
memory/872-6-0x0000000004F90000-0x0000000004F9A000-memory.dmp

Filesize
40KB

Download
memory/872-0-0x0000000074CAE000-0x0000000074CAF000-memory.dmp

Filesize
4KB

Download
memory/872-10-0x0000000074CAE000-0x0000000074CAF000-memory.dmp

Filesize
4KB

Download
memory/872-5-0x0000000074CA0000-0x0000000075450000-memory.dmp

Filesize
7.7MB

Download
memory/872-25-0x0000000074CA0000-0x0000000075450000-memory.dmp

Filesize
7.7MB

Download
memory/872-4-0x0000000004FA0000-0x0000000004FAA000-memory.dmp

Filesize
40KB

Download
memory/872-3-0x0000000004FB0000-0x0000000005042000-memory.dmp

Filesize
584KB

Download
memory/872-2-0x00000000054C0000-0x0000000005A64000-memory.dmp

Filesize
5.6MB

Download
memory/872-1-0x0000000000690000-0x00000000006D6000-memory.dmp

Filesize
280KB

Download
memory/2784-29-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads