asyncrat | 3fc01acb080ef608ddd10c30f5a85d8d2f2cdb3f64c6cd225b33ad9038e54efa

General

Target

3cab671b884dd93cc86f080c22b85050N.exe
Size

267KB
MD5

3cab671b884dd93cc86f080c22b85050
SHA1

6335ac1cb5d6854d59d10429bc958ea4540d2e9a
SHA256

3fc01acb080ef608ddd10c30f5a85d8d2f2cdb3f64c6cd225b33ad9038e54efa
SHA512

2f19cdbcc2a5fbe38f6c59d4a4e96fe8877ebc7b34cbdb50ad4bc1edb20a9daa65332c90cd47bf92e5f6e97548e2d02e222b42e9d02f3e4b87e9bd78659b07d9
SSDEEP

3072:WdvzDqxs8ORikgogWfiuRXd3YmSffdTKXNXANewGBvskX1pWA/sY:WFzDqa86hV6uRRqX1evPlwAEY

Score

10^/10

asyncrat persistence rat

Malware Config

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/64-28-0x0000000000400000-0x0000000000430000-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-1-5-21-3419463127-3903270268-2580331543-1000\Control Panel\International\Geo\Nation	3cab671b884dd93cc86f080c22b85050N.exe

Executes dropped EXE 1 IoCs

pid	Process
4580	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-1-5-21-3419463127-3903270268-2580331543-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HiPatch = "C:\\Users\\Admin\\AppData\\Roaming\\HiPatch\\HiPatchService.exe"	3cab671b884dd93cc86f080c22b85050N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4580 set thread context of 64	4580	HiPatchService.exe	99

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3116	timeout.exe

Suspicious behavior: EnumeratesProcesses 27 IoCs

pid	Process
4580	HiPatchService.exe
4580	HiPatchService.exe
64	RegAsm.exe
64	RegAsm.exe
64	RegAsm.exe
64	RegAsm.exe
64	RegAsm.exe
64	RegAsm.exe
64	RegAsm.exe
64	RegAsm.exe
64	RegAsm.exe
64	RegAsm.exe
64	RegAsm.exe
64	RegAsm.exe
64	RegAsm.exe
64	RegAsm.exe
64	RegAsm.exe
64	RegAsm.exe
64	RegAsm.exe
64	RegAsm.exe
64	RegAsm.exe
64	RegAsm.exe
64	RegAsm.exe
64	RegAsm.exe
64	RegAsm.exe
64	RegAsm.exe
64	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4580	HiPatchService.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 892 wrote to memory of 4580	892	3cab671b884dd93cc86f080c22b85050N.exe	93
PID 892 wrote to memory of 4580	892	3cab671b884dd93cc86f080c22b85050N.exe	93
PID 892 wrote to memory of 4580	892	3cab671b884dd93cc86f080c22b85050N.exe	93
PID 892 wrote to memory of 5044	892	3cab671b884dd93cc86f080c22b85050N.exe	94
PID 892 wrote to memory of 5044	892	3cab671b884dd93cc86f080c22b85050N.exe	94
PID 892 wrote to memory of 5044	892	3cab671b884dd93cc86f080c22b85050N.exe	94
PID 5044 wrote to memory of 3116	5044	cmd.exe	96
PID 5044 wrote to memory of 3116	5044	cmd.exe	96
PID 5044 wrote to memory of 3116	5044	cmd.exe	96
PID 4580 wrote to memory of 5064	4580	HiPatchService.exe	98
PID 4580 wrote to memory of 5064	4580	HiPatchService.exe	98
PID 4580 wrote to memory of 5064	4580	HiPatchService.exe	98
PID 4580 wrote to memory of 64	4580	HiPatchService.exe	99
PID 4580 wrote to memory of 64	4580	HiPatchService.exe	99
PID 4580 wrote to memory of 64	4580	HiPatchService.exe	99
PID 4580 wrote to memory of 64	4580	HiPatchService.exe	99
PID 4580 wrote to memory of 64	4580	HiPatchService.exe	99
PID 4580 wrote to memory of 64	4580	HiPatchService.exe	99
PID 4580 wrote to memory of 64	4580	HiPatchService.exe	99
PID 4580 wrote to memory of 64	4580	HiPatchService.exe	99

C:\Users\Admin\AppData\Local\Temp\3cab671b884dd93cc86f080c22b85050N.exe
"C:\Users\Admin\AppData\Local\Temp\3cab671b884dd93cc86f080c22b85050N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:892
- C:\Users\Admin\AppData\Roaming\HiPatch\HiPatchService.exe
  "C:\Users\Admin\AppData\Roaming\HiPatch\HiPatchService.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4580
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
    3⤵
    PID:5064
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
    3⤵
    - Checks processor information in registry
    - Suspicious behavior: EnumeratesProcesses
    PID:64
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\HiPatch\HiPatchService.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:5044
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 180
    3⤵
    - Delays execution with timeout.exe
    PID:3116

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:4992

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

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
a450b494ad0818246625e67dc5ae3b78

SHA1
ae5e4e039c3696b25f8f2fd6b0204e17ef522f56

SHA256
2746f85e1ff6f9176c0ae947a4f789e44746fef33082205ec7f6863de286c20f

SHA512
2c6c74b709ca135a6097297b5c7ea9e68082a428acafae316c977cf4bfe924f383946e424a28829423f763b22db49b39353007febf53c4753ef8677c393a64e8

Download Submit
memory/64-28-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/892-6-0x0000000005340000-0x000000000534A000-memory.dmp

Filesize
40KB

Download
memory/892-4-0x0000000005350000-0x000000000535A000-memory.dmp

Filesize
40KB

Download
memory/892-5-0x0000000074A10000-0x00000000751C0000-memory.dmp

Filesize
7.7MB

Download
memory/892-0-0x0000000074A1E000-0x0000000074A1F000-memory.dmp

Filesize
4KB

Download
memory/892-3-0x00000000053D0000-0x0000000005462000-memory.dmp

Filesize
584KB

Download
memory/892-25-0x0000000074A10000-0x00000000751C0000-memory.dmp

Filesize
7.7MB

Download
memory/892-2-0x00000000058E0000-0x0000000005E84000-memory.dmp

Filesize
5.6MB

Download
memory/892-1-0x0000000000900000-0x0000000000946000-memory.dmp

Filesize
280KB

Download
memory/4580-24-0x0000000074A10000-0x00000000751C0000-memory.dmp

Filesize
7.7MB

Download
memory/4580-26-0x0000000074A10000-0x00000000751C0000-memory.dmp

Filesize
7.7MB

Download
memory/4580-30-0x0000000074A10000-0x00000000751C0000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads