asyncrat | 113ed17fc6dff4197896f75a26ec2548d2f955f8062e8e02301f76fd338612e8

General

Target

113ed17fc6dff4197896f75a26ec2548d2f955f8062e8e02301f76fd338612e8.exe
Size

267KB
MD5

a4659dc2157ed87d0f1e6efb8e2fdbf7
SHA1

f7efacf8ada06e71fffa497009cd0b790e61d33b
SHA256

113ed17fc6dff4197896f75a26ec2548d2f955f8062e8e02301f76fd338612e8
SHA512

f0d7c63b1130f21b051d34fe03d36e30c2acccf21446559581fbdb18a24901d83d26dd2248ddeb24eef10d91da31d440d8c6a7b0926c10926fa9282c79e13e62
SSDEEP

3072:WdvzDqxs8ORikgogWfiuRXd3YmSffdTKXNXANewGBvskX1pWA/s8sdC:WFzDqa86hV6uRRqX1evPlwAEdC

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/4748-29-0x0000000000400000-0x0000000000430000-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-1-5-21-656926755-4116854191-210765258-1000\Control Panel\International\Geo\Nation	113ed17fc6dff4197896f75a26ec2548d2f955f8062e8e02301f76fd338612e8.exe

Executes dropped EXE 1 IoCs

pid	Process
4352	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"	113ed17fc6dff4197896f75a26ec2548d2f955f8062e8e02301f76fd338612e8.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4352 set thread context of 4748	4352	HiPatchService.exe	93

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	113ed17fc6dff4197896f75a26ec2548d2f955f8062e8e02301f76fd338612e8.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
116	timeout.exe

Suspicious behavior: EnumeratesProcesses 24 IoCs

pid	Process
4748	RegAsm.exe
4748	RegAsm.exe
4748	RegAsm.exe
4748	RegAsm.exe
4748	RegAsm.exe
4748	RegAsm.exe
4748	RegAsm.exe
4748	RegAsm.exe
4748	RegAsm.exe
4748	RegAsm.exe
4748	RegAsm.exe
4748	RegAsm.exe
4748	RegAsm.exe
4748	RegAsm.exe
4748	RegAsm.exe
4748	RegAsm.exe
4748	RegAsm.exe
4748	RegAsm.exe
4748	RegAsm.exe
4748	RegAsm.exe
4748	RegAsm.exe
4748	RegAsm.exe
4748	RegAsm.exe
4748	RegAsm.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 548 wrote to memory of 4352	548	113ed17fc6dff4197896f75a26ec2548d2f955f8062e8e02301f76fd338612e8.exe	87
PID 548 wrote to memory of 4352	548	113ed17fc6dff4197896f75a26ec2548d2f955f8062e8e02301f76fd338612e8.exe	87
PID 548 wrote to memory of 4352	548	113ed17fc6dff4197896f75a26ec2548d2f955f8062e8e02301f76fd338612e8.exe	87
PID 548 wrote to memory of 1056	548	113ed17fc6dff4197896f75a26ec2548d2f955f8062e8e02301f76fd338612e8.exe	88
PID 548 wrote to memory of 1056	548	113ed17fc6dff4197896f75a26ec2548d2f955f8062e8e02301f76fd338612e8.exe	88
PID 548 wrote to memory of 1056	548	113ed17fc6dff4197896f75a26ec2548d2f955f8062e8e02301f76fd338612e8.exe	88
PID 1056 wrote to memory of 116	1056	cmd.exe	90
PID 1056 wrote to memory of 116	1056	cmd.exe	90
PID 1056 wrote to memory of 116	1056	cmd.exe	90
PID 4352 wrote to memory of 4748	4352	HiPatchService.exe	93
PID 4352 wrote to memory of 4748	4352	HiPatchService.exe	93
PID 4352 wrote to memory of 4748	4352	HiPatchService.exe	93
PID 4352 wrote to memory of 4748	4352	HiPatchService.exe	93
PID 4352 wrote to memory of 4748	4352	HiPatchService.exe	93
PID 4352 wrote to memory of 4748	4352	HiPatchService.exe	93
PID 4352 wrote to memory of 4748	4352	HiPatchService.exe	93
PID 4352 wrote to memory of 4748	4352	HiPatchService.exe	93

C:\Users\Admin\AppData\Local\Temp\113ed17fc6dff4197896f75a26ec2548d2f955f8062e8e02301f76fd338612e8.exe
"C:\Users\Admin\AppData\Local\Temp\113ed17fc6dff4197896f75a26ec2548d2f955f8062e8e02301f76fd338612e8.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:548
- 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:4352
- - 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:4748
- 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:1056
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 180
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:116

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:4560

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
5b83f2a01eb93fe279f8843f6215189b

SHA1
20d9d68df015325348a7e79bd93525259bb1fa6f

SHA256
9e44a748d48f58b2cbd7e7de93b71f79127ad1da72215a92902e75d7255f68f9

SHA512
e27fda3536ab85b129a184d723139c6446c6f0d7025c2b284e87579bc47024e6cd038d4916a0873308a0ed0d154134ec70dcfb5e06eca6452551c22cc59816b1

Download Submit
memory/548-6-0x00000000059C0000-0x00000000059CA000-memory.dmp

Filesize
40KB

Download
memory/548-3-0x0000000005910000-0x00000000059A2000-memory.dmp

Filesize
584KB

Download
memory/548-4-0x0000000074EE0000-0x0000000075690000-memory.dmp

Filesize
7.7MB

Download
memory/548-5-0x00000000059D0000-0x00000000059DA000-memory.dmp

Filesize
40KB

Download
memory/548-0-0x0000000074EEE000-0x0000000074EEF000-memory.dmp

Filesize
4KB

Download
memory/548-10-0x0000000074EEE000-0x0000000074EEF000-memory.dmp

Filesize
4KB

Download
memory/548-2-0x0000000005FA0000-0x0000000006544000-memory.dmp

Filesize
5.6MB

Download
memory/548-25-0x0000000074EE0000-0x0000000075690000-memory.dmp

Filesize
7.7MB

Download
memory/548-1-0x0000000000EF0000-0x0000000000F36000-memory.dmp

Filesize
280KB

Download
memory/4352-26-0x0000000074EE0000-0x0000000075690000-memory.dmp

Filesize
7.7MB

Download
memory/4352-28-0x0000000074EE0000-0x0000000075690000-memory.dmp

Filesize
7.7MB

Download
memory/4352-31-0x0000000074EE0000-0x0000000075690000-memory.dmp

Filesize
7.7MB

Download
memory/4748-29-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads