asyncrat | 81cc95ed86dd840e6d4f9381d54a49345d6c329992bb10f578448e68de10b108

General

Target

81cc95ed86dd840e6d4f9381d54a49345d6c329992bb10f578448e68de10b108N.exe
Size

544KB
MD5

4ab04f6128ac78658115bdf49e842030
SHA1

bc3895eb9080d2be42c6a3a46f6ac5ecd27b54fd
SHA256

81cc95ed86dd840e6d4f9381d54a49345d6c329992bb10f578448e68de10b108
SHA512

054acca118b1cdbfa081e1558008a17de9b08bbf028922b3c54bc79b79d2df826f78f23e0d242bcc3ca7e533635de5061afd42fe9254eb9b26dc9430b19ec236
SSDEEP

6144:hHL4WOLSPswA+PjIMcTCRu9DWoitq2+nVE7pSwqPNq:uWO+PtBPj/cWwpYqq

Score

10^/10

asyncrat discovery persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.4.9G

C2

corporation.warzonedns.com:9341

Mutex

65845562146GZ23

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

Executes dropped EXE 1 IoCs

pid	Process
596	PlexMedia.exe

Loads dropped DLL 1 IoCs

pid	Process
2204	81cc95ed86dd840e6d4f9381d54a49345d6c329992bb10f578448e68de10b108N.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-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Windows\CurrentVersion\Run\PlexService = "C:\\Users\\Admin\\AppData\\Roaming\\PlexService\\PlexMedia.exe"	81cc95ed86dd840e6d4f9381d54a49345d6c329992bb10f578448e68de10b108N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 596 set thread context of 2860	596	PlexMedia.exe	34

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 4 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	81cc95ed86dd840e6d4f9381d54a49345d6c329992bb10f578448e68de10b108N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PlexMedia.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
2860	RegAsm.exe
2860	RegAsm.exe
2860	RegAsm.exe
2860	RegAsm.exe
2860	RegAsm.exe
2860	RegAsm.exe
2860	RegAsm.exe
2860	RegAsm.exe
2860	RegAsm.exe
2860	RegAsm.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2204 wrote to memory of 596	2204	81cc95ed86dd840e6d4f9381d54a49345d6c329992bb10f578448e68de10b108N.exe	31
PID 2204 wrote to memory of 596	2204	81cc95ed86dd840e6d4f9381d54a49345d6c329992bb10f578448e68de10b108N.exe	31
PID 2204 wrote to memory of 596	2204	81cc95ed86dd840e6d4f9381d54a49345d6c329992bb10f578448e68de10b108N.exe	31
PID 2204 wrote to memory of 596	2204	81cc95ed86dd840e6d4f9381d54a49345d6c329992bb10f578448e68de10b108N.exe	31
PID 2204 wrote to memory of 2736	2204	81cc95ed86dd840e6d4f9381d54a49345d6c329992bb10f578448e68de10b108N.exe	32
PID 2204 wrote to memory of 2736	2204	81cc95ed86dd840e6d4f9381d54a49345d6c329992bb10f578448e68de10b108N.exe	32
PID 2204 wrote to memory of 2736	2204	81cc95ed86dd840e6d4f9381d54a49345d6c329992bb10f578448e68de10b108N.exe	32
PID 2204 wrote to memory of 2736	2204	81cc95ed86dd840e6d4f9381d54a49345d6c329992bb10f578448e68de10b108N.exe	32
PID 596 wrote to memory of 2860	596	PlexMedia.exe	34
PID 596 wrote to memory of 2860	596	PlexMedia.exe	34
PID 596 wrote to memory of 2860	596	PlexMedia.exe	34
PID 596 wrote to memory of 2860	596	PlexMedia.exe	34
PID 596 wrote to memory of 2860	596	PlexMedia.exe	34
PID 596 wrote to memory of 2860	596	PlexMedia.exe	34
PID 596 wrote to memory of 2860	596	PlexMedia.exe	34
PID 596 wrote to memory of 2860	596	PlexMedia.exe	34
PID 596 wrote to memory of 2860	596	PlexMedia.exe	34
PID 596 wrote to memory of 2860	596	PlexMedia.exe	34
PID 596 wrote to memory of 2860	596	PlexMedia.exe	34
PID 596 wrote to memory of 2860	596	PlexMedia.exe	34

C:\Users\Admin\AppData\Local\Temp\81cc95ed86dd840e6d4f9381d54a49345d6c329992bb10f578448e68de10b108N.exe
"C:\Users\Admin\AppData\Local\Temp\81cc95ed86dd840e6d4f9381d54a49345d6c329992bb10f578448e68de10b108N.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2204
- C:\Users\Admin\AppData\Roaming\PlexService\PlexMedia.exe
  "C:\Users\Admin\AppData\Roaming\PlexService\PlexMedia.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:596
- - 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
    - Suspicious behavior: EnumeratesProcesses
    PID:2860
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Roaming\PlexService\PlexMedia.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2736

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:2620

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

System Information Discovery

1

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\PlexService\PlexMedia.bat

Filesize
212B

MD5
787142f81eb1a9ec3f978ac64e069ee9

SHA1
cb5d7aa00da5378f01bcab6ea47e2e1ec75209af

SHA256
d1092363d523d099cdbbaefef20dba86d6f8a8b7717b311a7262367f8fa9a303

SHA512
d1abd517f1a4a6702787f707efe3fe8c355cafe2664b0a4784c22c7076bc90aaa570292d5e079c12f72ef6ebebb36b0f51215412bb963854b6614332ce447a5d

Download Submit
\Users\Admin\AppData\Roaming\PlexService\PlexMedia.exe

Filesize
544KB

MD5
818251f1cee7c4a217d173cd617c9cdc

SHA1
5e7defc403c506b4269f0836f133b2794686f88a

SHA256
0aada4e15a7ac4b49177ad479d69777bf66149cf3b052d4dadfb0250fbecef47

SHA512
359d7a2dab9a8704c869cb63b0d9438e04067311bd97a3b392677cf2e61fe27b97724440b7ff7285a3ef3e90a0cffe9ccd8b0bb3cee70c73dab030c7aba89dee

Download Submit
memory/596-39-0x00000000747C0000-0x0000000074EAE000-memory.dmp

Filesize
6.9MB

Download
memory/596-24-0x00000000747C0000-0x0000000074EAE000-memory.dmp

Filesize
6.9MB

Download
memory/596-22-0x0000000000A40000-0x0000000000ACE000-memory.dmp

Filesize
568KB

Download
memory/2204-26-0x00000000747C0000-0x0000000074EAE000-memory.dmp

Filesize
6.9MB

Download
memory/2204-3-0x00000000747C0000-0x0000000074EAE000-memory.dmp

Filesize
6.9MB

Download
memory/2204-20-0x00000000747CE000-0x00000000747CF000-memory.dmp

Filesize
4KB

Download
memory/2204-2-0x0000000000390000-0x000000000039A000-memory.dmp

Filesize
40KB

Download
memory/2204-23-0x00000000747C0000-0x0000000074EAE000-memory.dmp

Filesize
6.9MB

Download
memory/2204-0-0x00000000747CE000-0x00000000747CF000-memory.dmp

Filesize
4KB

Download
memory/2204-1-0x0000000000EE0000-0x0000000000F6E000-memory.dmp

Filesize
568KB

Download
memory/2860-36-0x0000000000400000-0x0000000000436000-memory.dmp

Filesize
216KB

Download
memory/2860-38-0x0000000000400000-0x0000000000436000-memory.dmp

Filesize
216KB

Download
memory/2860-37-0x0000000000400000-0x0000000000436000-memory.dmp

Filesize
216KB

Download
memory/2860-35-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2860-33-0x0000000000400000-0x0000000000436000-memory.dmp

Filesize
216KB

Download
memory/2860-31-0x0000000000400000-0x0000000000436000-memory.dmp

Filesize
216KB

Download
memory/2860-29-0x0000000000400000-0x0000000000436000-memory.dmp

Filesize
216KB

Download
memory/2860-27-0x0000000000400000-0x0000000000436000-memory.dmp

Filesize
216KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads