asyncrat | 8bad37792d9e68fccedf51dcf152838e800ba353f5d602ef72fff87cb3ab24dd

General

Target

d27593e8068dcc8e3739e31b0ebc5190N.exe
Size

267KB
MD5

d27593e8068dcc8e3739e31b0ebc5190
SHA1

ea9686170a7094e0541e48774b1688ce203f8a48
SHA256

8bad37792d9e68fccedf51dcf152838e800ba353f5d602ef72fff87cb3ab24dd
SHA512

f215d97a07104c0b87267a29105620c58c69868bc599357e8d20c40b751bc697ad8822cf9e1934b5e01721154a928f0282148d480c96e5500f4d171bf305ebe1
SSDEEP

3072:WdvzDqxs8ORikgogWfiuRXd3YmSffdTKXNXANewGBvskX1pWA/d:WFzDqa86hV6uRRqX1evPlwA1

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/3504-30-0x0000000000400000-0x0000000000430000-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-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\International\Geo\Nation	d27593e8068dcc8e3739e31b0ebc5190N.exe

Executes dropped EXE 1 IoCs

pid	Process
736	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-1-5-21-2718105630-359604950-2820636825-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HiPatch = "C:\\Users\\Admin\\AppData\\Roaming\\HiPatch\\HiPatchService.exe"	d27593e8068dcc8e3739e31b0ebc5190N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 736 set thread context of 3504	736	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d27593e8068dcc8e3739e31b0ebc5190N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	HiPatchService.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
3284	timeout.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
3504	RegAsm.exe
3504	RegAsm.exe
3504	RegAsm.exe
3504	RegAsm.exe
3504	RegAsm.exe
3504	RegAsm.exe
3504	RegAsm.exe
3504	RegAsm.exe
3504	RegAsm.exe
3504	RegAsm.exe
3504	RegAsm.exe
3504	RegAsm.exe
3504	RegAsm.exe
3504	RegAsm.exe
3504	RegAsm.exe
3504	RegAsm.exe
3504	RegAsm.exe
3504	RegAsm.exe
3504	RegAsm.exe
3504	RegAsm.exe
3504	RegAsm.exe
3504	RegAsm.exe
3504	RegAsm.exe
3504	RegAsm.exe
3504	RegAsm.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 4868 wrote to memory of 736	4868	d27593e8068dcc8e3739e31b0ebc5190N.exe	87
PID 4868 wrote to memory of 736	4868	d27593e8068dcc8e3739e31b0ebc5190N.exe	87
PID 4868 wrote to memory of 736	4868	d27593e8068dcc8e3739e31b0ebc5190N.exe	87
PID 4868 wrote to memory of 2448	4868	d27593e8068dcc8e3739e31b0ebc5190N.exe	88
PID 4868 wrote to memory of 2448	4868	d27593e8068dcc8e3739e31b0ebc5190N.exe	88
PID 4868 wrote to memory of 2448	4868	d27593e8068dcc8e3739e31b0ebc5190N.exe	88
PID 2448 wrote to memory of 3284	2448	cmd.exe	90
PID 2448 wrote to memory of 3284	2448	cmd.exe	90
PID 2448 wrote to memory of 3284	2448	cmd.exe	90
PID 736 wrote to memory of 3504	736	HiPatchService.exe	93
PID 736 wrote to memory of 3504	736	HiPatchService.exe	93
PID 736 wrote to memory of 3504	736	HiPatchService.exe	93
PID 736 wrote to memory of 3504	736	HiPatchService.exe	93
PID 736 wrote to memory of 3504	736	HiPatchService.exe	93
PID 736 wrote to memory of 3504	736	HiPatchService.exe	93
PID 736 wrote to memory of 3504	736	HiPatchService.exe	93
PID 736 wrote to memory of 3504	736	HiPatchService.exe	93

C:\Users\Admin\AppData\Local\Temp\d27593e8068dcc8e3739e31b0ebc5190N.exe
"C:\Users\Admin\AppData\Local\Temp\d27593e8068dcc8e3739e31b0ebc5190N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4868
- 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:736
- - 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:3504
- 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:2448
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 180
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3284

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:2696

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

Replay Monitor

Loading Replay Monitor...

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
268KB

MD5
bd90611f09848a35381d33c5f505f611

SHA1
50da64211ef66b9abd9590c5b63760b73a5ebbf1

SHA256
3e1c6b61069cd628af377518576f4daf156d6b1e7c4b90d7ba7dd51574c1079f

SHA512
a78b68a035aa591ec8ca7c8385ffc21ec5af9db54ac9e82beea2e27707c402aed6728f19b74b8a790ddc8ad88457b6d3c4279cde9c75587b0e72c34a64003c58

Download Submit
memory/736-27-0x0000000074CB0000-0x0000000075460000-memory.dmp

Filesize
7.7MB

Download
memory/736-32-0x0000000074CB0000-0x0000000075460000-memory.dmp

Filesize
7.7MB

Download
memory/736-28-0x0000000074CB0000-0x0000000075460000-memory.dmp

Filesize
7.7MB

Download
memory/3504-30-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/4868-4-0x0000000005210000-0x000000000521A000-memory.dmp

Filesize
40KB

Download
memory/4868-2-0x0000000005800000-0x0000000005DA4000-memory.dmp

Filesize
5.6MB

Download
memory/4868-6-0x0000000005200000-0x000000000520A000-memory.dmp

Filesize
40KB

Download
memory/4868-12-0x0000000074CBE000-0x0000000074CBF000-memory.dmp

Filesize
4KB

Download
memory/4868-26-0x0000000074CB0000-0x0000000075460000-memory.dmp

Filesize
7.7MB

Download
memory/4868-0-0x0000000074CBE000-0x0000000074CBF000-memory.dmp

Filesize
4KB

Download
memory/4868-1-0x00000000007E0000-0x0000000000826000-memory.dmp

Filesize
280KB

Download
memory/4868-25-0x0000000074CB0000-0x0000000075460000-memory.dmp

Filesize
7.7MB

Download
memory/4868-5-0x0000000074CB0000-0x0000000075460000-memory.dmp

Filesize
7.7MB

Download
memory/4868-3-0x0000000005250000-0x00000000052E2000-memory.dmp

Filesize
584KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads