asyncrat | 6143e80d28f382ac57c41eeab350f8be0e88f642211ae1726538685eb0686aa9

General

Target

JaffaCakes118_777a952f66baa34bde02c6075430a407.exe
Size

50KB
MD5

777a952f66baa34bde02c6075430a407
SHA1

e737be56566ab4f09abcf8988220f0517834851d
SHA256

6143e80d28f382ac57c41eeab350f8be0e88f642211ae1726538685eb0686aa9
SHA512

b707be23a181518d4a318101e8b5dc04dba26949cc2e743e50f054eefffdc0585a9a8502719f732d1855a841735771d43717ff4611b36d6a27598235f3023402
SSDEEP

768:f95geQCs3gOm6tiJSaZok3PRBX4fIOJaWm+YrEGMlc9OtwCvU062:fQe3sQMtBa+y5OsWm+Ygz20v

Score

10^/10

asyncrat default discovery execution rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

192.168.137.247:6606

192.168.137.247:7707

192.168.137.247:8808

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x0008000000012102-1.dat	family_asyncrat

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2072	powershell.exe
2748	powershell.exe

Executes dropped EXE 1 IoCs

pid	Process
2388	AsyncClient.exe

Loads dropped DLL 1 IoCs

pid	Process
2336	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 6 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	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AsyncClient.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_777a952f66baa34bde02c6075430a407.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2072	powershell.exe
2748	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2072	powershell.exe
Token: SeDebugPrivilege	2748	powershell.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2496 wrote to memory of 2008	2496	JaffaCakes118_777a952f66baa34bde02c6075430a407.exe	30
PID 2496 wrote to memory of 2008	2496	JaffaCakes118_777a952f66baa34bde02c6075430a407.exe	30
PID 2496 wrote to memory of 2008	2496	JaffaCakes118_777a952f66baa34bde02c6075430a407.exe	30
PID 2496 wrote to memory of 2008	2496	JaffaCakes118_777a952f66baa34bde02c6075430a407.exe	30
PID 2496 wrote to memory of 2336	2496	JaffaCakes118_777a952f66baa34bde02c6075430a407.exe	32
PID 2496 wrote to memory of 2336	2496	JaffaCakes118_777a952f66baa34bde02c6075430a407.exe	32
PID 2496 wrote to memory of 2336	2496	JaffaCakes118_777a952f66baa34bde02c6075430a407.exe	32
PID 2496 wrote to memory of 2336	2496	JaffaCakes118_777a952f66baa34bde02c6075430a407.exe	32
PID 2008 wrote to memory of 2072	2008	cmd.exe	34
PID 2008 wrote to memory of 2072	2008	cmd.exe	34
PID 2008 wrote to memory of 2072	2008	cmd.exe	34
PID 2008 wrote to memory of 2072	2008	cmd.exe	34
PID 2336 wrote to memory of 2388	2336	cmd.exe	35
PID 2336 wrote to memory of 2388	2336	cmd.exe	35
PID 2336 wrote to memory of 2388	2336	cmd.exe	35
PID 2336 wrote to memory of 2388	2336	cmd.exe	35
PID 2008 wrote to memory of 2748	2008	cmd.exe	36
PID 2008 wrote to memory of 2748	2008	cmd.exe	36
PID 2008 wrote to memory of 2748	2008	cmd.exe	36
PID 2008 wrote to memory of 2748	2008	cmd.exe	36

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_777a952f66baa34bde02c6075430a407.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_777a952f66baa34bde02c6075430a407.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2496
- C:\Windows\SysWOW64\cmd.exe
  cmd /c powershell -Command "Add-MpPreference -ExclusionPath @($env:UserProfile,$env:AppData,$env:Temp,$env:SystemRoot,$env:HomeDrive,$env:SystemDrive) -Force" & powershell -Command "Add-MpPreference -ExclusionExtension @('exe','dll') -Force" & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2008
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell -Command "Add-MpPreference -ExclusionPath @($env:UserProfile,$env:AppData,$env:Temp,$env:SystemRoot,$env:HomeDrive,$env:SystemDrive) -Force"
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2072
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell -Command "Add-MpPreference -ExclusionExtension @('exe','dll') -Force"
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2748
- C:\Windows\SysWOW64\cmd.exe
  cmd /c start C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2336
- - C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
    C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2388

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

Filesize
7KB

MD5
7ca463dd54051ed0c761277784646a1f

SHA1
fe82b6c8f1ba74ffb06aa8040ee92513018323e6

SHA256
62e29935e8c5b48c703ce5f8e7d9fdb4ce87530b654d7d3eb85e1702c13ccef6

SHA512
e65a75ce4102c642f047684760b3bb2ed401c545d0ca197847d0a701f465889e95f3bc9d2fbed2235b4f63773ddb888920f7a7ee88fe4cf4f4eec6402055d022

Download Submit
\Users\Admin\AppData\Local\Temp\AsyncClient.exe

Filesize
45KB

MD5
3f127abdbfa5ac67e53626fd66b0158d

SHA1
2ccd44e4f9bee67efd6b41697b05e75e911deb3c

SHA256
11fea91a8185b0f2d91e262d8dcb89046a77e257b90ebe63cb230c61c75b8456

SHA512
c2bd2241d563e3f957448e8a6ace2b0c1920c3c7162386e014c91b1df1b6029cb06c13fed262690ebe9e8e07c3840f3455791202defedff000e96e433dc00c7f

Download Submit
memory/2388-4-0x000000007411E000-0x000000007411F000-memory.dmp

Filesize
4KB

Download
memory/2388-7-0x0000000000080000-0x0000000000092000-memory.dmp

Filesize
72KB

Download
memory/2388-13-0x000000007411E000-0x000000007411F000-memory.dmp

Filesize
4KB

Download

Analysis

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