asyncrat | 9f3169004f468804b94ec9c9b8a58b30d9853e8be06ebd7d3d3ea8ca18df6fd2

General

Target

cf9acdeb824bb9df6a31761b8dbc487f_JaffaCakes118.exe
Size

41KB
MD5

cf9acdeb824bb9df6a31761b8dbc487f
SHA1

e6585c92833fd710920d738f791341c05852bfeb
SHA256

9f3169004f468804b94ec9c9b8a58b30d9853e8be06ebd7d3d3ea8ca18df6fd2
SHA512

ba78e9f6c26b2900b20853a6287b0dc6f27b7683317d1cf304cc0ad9decb7cad8b56299b408540399ecc9184afaee61ec485024580499cb48d28dfaba6805ce8
SSDEEP

768:7YOYRRNa5FN36puc1C2jT6zhcUDTZxmEyNnyWWaq2:LScx6puOLjT+hcUnA8WVx

Score

10^/10

asyncrat default discovery 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

207.32.216.106:6606

207.32.216.106:7707

207.32.216.106:8808

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
WinSecurity.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/files/0x00070000000234e5-24.dat	family_asyncrat

Checks computer location settings 2 TTPs 3 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-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\International\Geo\Nation	cf9acdeb824bb9df6a31761b8dbc487f_JaffaCakes118.exe
Key value queried	\REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\International\Geo\Nation	Client.exe
Key value queried	\REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\International\Geo\Nation	AsyncClient.exe

Executes dropped EXE 3 IoCs

pid	Process
2552	Client.exe
1556	AsyncClient.exe
1752	WinSecurity.exe

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 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	WinSecurity.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AsyncClient.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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1984	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
4300	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
1556	AsyncClient.exe
1556	AsyncClient.exe
1556	AsyncClient.exe
1556	AsyncClient.exe
1556	AsyncClient.exe
1556	AsyncClient.exe
1556	AsyncClient.exe
1556	AsyncClient.exe
1556	AsyncClient.exe
1556	AsyncClient.exe
1556	AsyncClient.exe
1556	AsyncClient.exe
1556	AsyncClient.exe
1556	AsyncClient.exe
1556	AsyncClient.exe
1556	AsyncClient.exe
1556	AsyncClient.exe
1556	AsyncClient.exe
1556	AsyncClient.exe
1556	AsyncClient.exe
1556	AsyncClient.exe
1556	AsyncClient.exe
1556	AsyncClient.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1556	AsyncClient.exe
Token: SeDebugPrivilege	1752	WinSecurity.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1648 wrote to memory of 2552	1648	cf9acdeb824bb9df6a31761b8dbc487f_JaffaCakes118.exe	83
PID 1648 wrote to memory of 2552	1648	cf9acdeb824bb9df6a31761b8dbc487f_JaffaCakes118.exe	83
PID 2552 wrote to memory of 1556	2552	Client.exe	84
PID 2552 wrote to memory of 1556	2552	Client.exe	84
PID 2552 wrote to memory of 1556	2552	Client.exe	84
PID 1556 wrote to memory of 4908	1556	AsyncClient.exe	91
PID 1556 wrote to memory of 4908	1556	AsyncClient.exe	91
PID 1556 wrote to memory of 4908	1556	AsyncClient.exe	91
PID 1556 wrote to memory of 3332	1556	AsyncClient.exe	93
PID 1556 wrote to memory of 3332	1556	AsyncClient.exe	93
PID 1556 wrote to memory of 3332	1556	AsyncClient.exe	93
PID 3332 wrote to memory of 1984	3332	cmd.exe	96
PID 3332 wrote to memory of 1984	3332	cmd.exe	96
PID 3332 wrote to memory of 1984	3332	cmd.exe	96
PID 4908 wrote to memory of 4300	4908	cmd.exe	97
PID 4908 wrote to memory of 4300	4908	cmd.exe	97
PID 4908 wrote to memory of 4300	4908	cmd.exe	97
PID 3332 wrote to memory of 1752	3332	cmd.exe	99
PID 3332 wrote to memory of 1752	3332	cmd.exe	99
PID 3332 wrote to memory of 1752	3332	cmd.exe	99

C:\Users\Admin\AppData\Local\Temp\cf9acdeb824bb9df6a31761b8dbc487f_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\cf9acdeb824bb9df6a31761b8dbc487f_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1648
- C:\Users\Admin\AppData\Local\Temp\Client.exe
  "C:\Users\Admin\AppData\Local\Temp\Client.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:2552
- - C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
    "C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1556
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "WinSecurity" /tr '"C:\Users\Admin\AppData\Roaming\WinSecurity.exe"' & exit
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:4908
    - - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /f /sc onlogon /rl highest /tn "WinSecurity" /tr '"C:\Users\Admin\AppData\Roaming\WinSecurity.exe"'
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:4300
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpB0F1.tmp.bat""
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:3332
    - - C:\Windows\SysWOW64\timeout.exe
        
        timeout 3
        5⤵
        System Location Discovery: System Language Discovery
        Delays execution with timeout.exe
        
        PID:1984
    - - C:\Users\Admin\AppData\Roaming\WinSecurity.exe
        
        "C:\Users\Admin\AppData\Roaming\WinSecurity.exe"
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of AdjustPrivilegeToken
        
        PID:1752

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

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\Local\Temp\AsyncClient.exe

Filesize
45KB

MD5
97def300dec6a8ca1b9a055e4b36a2a0

SHA1
f46929e192c46c8ffa1a8875d594dc8fc8ae2e62

SHA256
4c71010ecc3e194f4d1b06decacd87d0da4ba1b46ee40d09b4fb617f354966fc

SHA512
adce42118ccfd4852781c0ada61961c02a6109b2be0ede7599906d3d0ff1553f038b331c09468022c9de5bf7fa3f392a66972dad9c4e6fe904ced399454265b1

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

Filesize
32KB

MD5
1e35717cd8ddd2281a5acabd483b2a41

SHA1
7073616e0959ab9590a7a133ed9d9201e0e8c460

SHA256
b9e84d395202a437fd777cded8abb1739bd371369924583f83bb9cd92c6ef2f1

SHA512
3e5fd1b5ed6fc43656c7b162f97e74c43dbdac8184bc2289b6324e64eff689f39fcd6f1076504be10adb2eb8014b056bb01db41ac9847641d664a58f29f98482

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpB0F1.tmp.bat

Filesize
155B

MD5
f564ef10c36dc4a71bc75eda4c4f6990

SHA1
2426e5ba65c999e2994739e1af168ad934d72790

SHA256
8358d90816e638254c991b063574e229a280b0febc5da92bb4c8b982de25dd6c

SHA512
e2f0668cbff61d3854300176b2a185e207b41b7b8ebf7203dac9dc05353059d5d350788cf1fec6329ed0c28a5962cecd9d23badb4ada733e44015b3086e69fa3

Download Submit
memory/1556-34-0x0000000000260000-0x0000000000272000-memory.dmp

Filesize
72KB

Download
memory/1556-35-0x0000000004AF0000-0x0000000004B8C000-memory.dmp

Filesize
624KB

Download
memory/1648-1-0x00007FFCAAD70000-0x00007FFCAAF65000-memory.dmp

Filesize
2.0MB

Download
memory/1648-4-0x00007FFCAAD70000-0x00007FFCAAF65000-memory.dmp

Filesize
2.0MB

Download
memory/1648-16-0x00007FFCAAD70000-0x00007FFCAAF65000-memory.dmp

Filesize
2.0MB

Download
memory/1648-0-0x0000000000B30000-0x0000000000B40000-memory.dmp

Filesize
64KB

Download
memory/2552-18-0x00007FFCAAD70000-0x00007FFCAAF65000-memory.dmp

Filesize
2.0MB

Download
memory/2552-32-0x00007FFCAAD70000-0x00007FFCAAF65000-memory.dmp

Filesize
2.0MB

Download
memory/2552-21-0x00007FFCAAD70000-0x00007FFCAAF65000-memory.dmp

Filesize
2.0MB

Download
memory/2552-17-0x0000000000F80000-0x0000000000F8E000-memory.dmp

Filesize
56KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads