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
behavioral2/files/0x000c000000023bb1-2.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
3488	powershell.exe
5112	powershell.exe

Executes dropped EXE 1 IoCs

pid	Process
2544	AsyncClient.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	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
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

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3488	powershell.exe
3488	powershell.exe
5112	powershell.exe
5112	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3488	powershell.exe
Token: SeDebugPrivilege	5112	powershell.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4900 wrote to memory of 1224	4900	JaffaCakes118_777a952f66baa34bde02c6075430a407.exe	83
PID 4900 wrote to memory of 1224	4900	JaffaCakes118_777a952f66baa34bde02c6075430a407.exe	83
PID 4900 wrote to memory of 1224	4900	JaffaCakes118_777a952f66baa34bde02c6075430a407.exe	83
PID 4900 wrote to memory of 3532	4900	JaffaCakes118_777a952f66baa34bde02c6075430a407.exe	84
PID 4900 wrote to memory of 3532	4900	JaffaCakes118_777a952f66baa34bde02c6075430a407.exe	84
PID 4900 wrote to memory of 3532	4900	JaffaCakes118_777a952f66baa34bde02c6075430a407.exe	84
PID 1224 wrote to memory of 3488	1224	cmd.exe	87
PID 1224 wrote to memory of 3488	1224	cmd.exe	87
PID 1224 wrote to memory of 3488	1224	cmd.exe	87
PID 3532 wrote to memory of 2544	3532	cmd.exe	88
PID 3532 wrote to memory of 2544	3532	cmd.exe	88
PID 3532 wrote to memory of 2544	3532	cmd.exe	88
PID 1224 wrote to memory of 5112	1224	cmd.exe	89
PID 1224 wrote to memory of 5112	1224	cmd.exe	89
PID 1224 wrote to memory of 5112	1224	cmd.exe	89

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:4900
- 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:1224
- - 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:3488
- - 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:5112
- C:\Windows\SysWOW64\cmd.exe
  cmd /c start C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3532
- - 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:2544

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\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
968cb9309758126772781b83adb8a28f

SHA1
8da30e71accf186b2ba11da1797cf67f8f78b47c

SHA256
92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

SHA512
4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
18KB

MD5
963804e052333910e78e75cf7f7b4370

SHA1
b3729e77d62e3d1fe6828be28bd1bba9c6356db9

SHA256
f84295cb4db98d43d8386f70aafb3bd62944888a565f33b13bd77002ec905752

SHA512
8eb8da0a34bfd5fecd0f9506fc3fdf581f23ce53699565d5cdc231f80b943b775dcaa2b6783a333232f0db93a205e8f831bb7fb7765431bbdac83785bd66b8cd

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

Filesize
45KB

MD5
3f127abdbfa5ac67e53626fd66b0158d

SHA1
2ccd44e4f9bee67efd6b41697b05e75e911deb3c

SHA256
11fea91a8185b0f2d91e262d8dcb89046a77e257b90ebe63cb230c61c75b8456

SHA512
c2bd2241d563e3f957448e8a6ace2b0c1920c3c7162386e014c91b1df1b6029cb06c13fed262690ebe9e8e07c3840f3455791202defedff000e96e433dc00c7f

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_f23v4fpk.ppz.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2544-4-0x0000000074AEE000-0x0000000074AEF000-memory.dmp

Filesize
4KB

Download
memory/2544-78-0x0000000074AE0000-0x0000000075290000-memory.dmp

Filesize
7.7MB

Download
memory/2544-5-0x00000000003F0000-0x0000000000402000-memory.dmp

Filesize
72KB

Download
memory/2544-76-0x0000000074AEE000-0x0000000074AEF000-memory.dmp

Filesize
4KB

Download
memory/2544-43-0x0000000074AE0000-0x0000000075290000-memory.dmp

Filesize
7.7MB

Download
memory/3488-38-0x00000000060B0000-0x00000000060CE000-memory.dmp

Filesize
120KB

Download
memory/3488-44-0x0000000006EB0000-0x0000000006EBA000-memory.dmp

Filesize
40KB

Download
memory/3488-11-0x0000000005260000-0x00000000052C6000-memory.dmp

Filesize
408KB

Download
memory/3488-23-0x0000000074AE0000-0x0000000075290000-memory.dmp

Filesize
7.7MB

Download
memory/3488-24-0x0000000005B10000-0x0000000005B2E000-memory.dmp

Filesize
120KB

Download
memory/3488-25-0x0000000005BA0000-0x0000000005BEC000-memory.dmp

Filesize
304KB

Download
memory/3488-37-0x0000000074AE0000-0x0000000075290000-memory.dmp

Filesize
7.7MB

Download
memory/3488-27-0x0000000070980000-0x00000000709CC000-memory.dmp

Filesize
304KB

Download
memory/3488-26-0x00000000060D0000-0x0000000006102000-memory.dmp

Filesize
200KB

Download
memory/3488-12-0x0000000005380000-0x00000000053E6000-memory.dmp

Filesize
408KB

Download
memory/3488-39-0x0000000074AE0000-0x0000000075290000-memory.dmp

Filesize
7.7MB

Download
memory/3488-40-0x0000000006B00000-0x0000000006BA3000-memory.dmp

Filesize
652KB

Download
memory/3488-41-0x0000000007480000-0x0000000007AFA000-memory.dmp

Filesize
6.5MB

Download
memory/3488-42-0x0000000006E40000-0x0000000006E5A000-memory.dmp

Filesize
104KB

Download
memory/3488-10-0x0000000074AE0000-0x0000000075290000-memory.dmp

Filesize
7.7MB

Download
memory/3488-18-0x00000000054F0000-0x0000000005844000-memory.dmp

Filesize
3.3MB

Download
memory/3488-45-0x00000000070D0000-0x0000000007166000-memory.dmp

Filesize
600KB

Download
memory/3488-46-0x0000000007040000-0x0000000007051000-memory.dmp

Filesize
68KB

Download
memory/3488-47-0x0000000007080000-0x000000000708E000-memory.dmp

Filesize
56KB

Download
memory/3488-48-0x0000000007090000-0x00000000070A4000-memory.dmp

Filesize
80KB

Download
memory/3488-49-0x0000000007170000-0x000000000718A000-memory.dmp

Filesize
104KB

Download
memory/3488-50-0x00000000070C0000-0x00000000070C8000-memory.dmp

Filesize
32KB

Download
memory/3488-53-0x0000000074AE0000-0x0000000075290000-memory.dmp

Filesize
7.7MB

Download
memory/3488-9-0x0000000004B00000-0x0000000004B22000-memory.dmp

Filesize
136KB

Download
memory/3488-6-0x0000000074AE0000-0x0000000075290000-memory.dmp

Filesize
7.7MB

Download
memory/3488-8-0x0000000004B80000-0x00000000051A8000-memory.dmp

Filesize
6.2MB

Download
memory/3488-7-0x0000000004510000-0x0000000004546000-memory.dmp

Filesize
216KB

Download
memory/5112-66-0x0000000070980000-0x00000000709CC000-memory.dmp

Filesize
304KB

Download
memory/5112-64-0x0000000005650000-0x00000000059A4000-memory.dmp

Filesize
3.3MB

Download

Analysis

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