asyncrat | 727704989958642937c6bd8a84903b74a1fc1841e791c239a055573b0fe628c4

General

Target

client.exe
Size

47KB
MD5

c8d7a1fbf24efd3a9ef031b81a4fbdcb
SHA1

1147ff4e42c33ce3795422d3309f83e3460dba6b
SHA256

727704989958642937c6bd8a84903b74a1fc1841e791c239a055573b0fe628c4
SHA512

b6c5415e31aef5acd04ccb969916f2184232bcbcca9a5f691eb4cb79e9f40cba8e3ca53d55cba072e34165b1e8ad55564f2121540d178a76165d866a8279bd6a
SSDEEP

768:YuW01Towx/9WU9mp+Xmo2qzQh+JRVLiCPIsAKjILU0bu0kv/TRTXfuO6fcIuyvBQ:YuW01ToqEO2MLliLsAKjEbu0a/TRbWOt

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

127.0.0.1:4444

70.104.186.131:6606

70.104.186.131:7707

70.104.186.131:8808

70.104.186.131:4444

Mutex

P7nH82MyXxoq

Attributes

delay
3
install
true
install_file
windowsappsec.exe
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/0x000a0000000122ea-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2632	windowsappsec.exe

Loads dropped DLL 1 IoCs

pid	Process
2596	cmd.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	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	windowsappsec.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	client.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2628	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
2688	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2668	client.exe
2668	client.exe
2668	client.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2668	client.exe
Token: SeDebugPrivilege	2632	windowsappsec.exe
Token: SeDebugPrivilege	2632	windowsappsec.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2668 wrote to memory of 2928	2668	client.exe	31
PID 2668 wrote to memory of 2928	2668	client.exe	31
PID 2668 wrote to memory of 2928	2668	client.exe	31
PID 2668 wrote to memory of 2928	2668	client.exe	31
PID 2668 wrote to memory of 2596	2668	client.exe	33
PID 2668 wrote to memory of 2596	2668	client.exe	33
PID 2668 wrote to memory of 2596	2668	client.exe	33
PID 2668 wrote to memory of 2596	2668	client.exe	33
PID 2928 wrote to memory of 2688	2928	cmd.exe	35
PID 2928 wrote to memory of 2688	2928	cmd.exe	35
PID 2928 wrote to memory of 2688	2928	cmd.exe	35
PID 2928 wrote to memory of 2688	2928	cmd.exe	35
PID 2596 wrote to memory of 2628	2596	cmd.exe	36
PID 2596 wrote to memory of 2628	2596	cmd.exe	36
PID 2596 wrote to memory of 2628	2596	cmd.exe	36
PID 2596 wrote to memory of 2628	2596	cmd.exe	36
PID 2596 wrote to memory of 2632	2596	cmd.exe	37
PID 2596 wrote to memory of 2632	2596	cmd.exe	37
PID 2596 wrote to memory of 2632	2596	cmd.exe	37
PID 2596 wrote to memory of 2632	2596	cmd.exe	37

C:\Users\Admin\AppData\Local\Temp\client.exe
"C:\Users\Admin\AppData\Local\Temp\client.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2668
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "windowsappsec" /tr '"C:\Users\Admin\AppData\Roaming\windowsappsec.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2928
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "windowsappsec" /tr '"C:\Users\Admin\AppData\Roaming\windowsappsec.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2688
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpFE9A.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2596
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2628
- - C:\Users\Admin\AppData\Roaming\windowsappsec.exe
    "C:\Users\Admin\AppData\Roaming\windowsappsec.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2632

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

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\Local\Temp\tmpFE9A.tmp.bat

Filesize
157B

MD5
1176b36cc7359bccf491b3733d0fd0b1

SHA1
e47b8f8148b8bb6bb53235774b4f366719ac59d0

SHA256
e647143d4227d12335432085af433f2cf97b005772e1b33a4b1a385aab402cce

SHA512
bd839c877992d1ec7fc6a2a47af26b2f30dd5e0690aa22cf78cb75d33b6529b7566c5358a188b7f7fe6ed6a72824df1703ca24fa495ecba58269de3e78cf642a

Download Submit
\Users\Admin\AppData\Roaming\windowsappsec.exe

Filesize
47KB

MD5
c8d7a1fbf24efd3a9ef031b81a4fbdcb

SHA1
1147ff4e42c33ce3795422d3309f83e3460dba6b

SHA256
727704989958642937c6bd8a84903b74a1fc1841e791c239a055573b0fe628c4

SHA512
b6c5415e31aef5acd04ccb969916f2184232bcbcca9a5f691eb4cb79e9f40cba8e3ca53d55cba072e34165b1e8ad55564f2121540d178a76165d866a8279bd6a

Download Submit
memory/2632-16-0x0000000000910000-0x0000000000922000-memory.dmp

Filesize
72KB

Download
memory/2668-0-0x000000007433E000-0x000000007433F000-memory.dmp

Filesize
4KB

Download
memory/2668-1-0x0000000001350000-0x0000000001362000-memory.dmp

Filesize
72KB

Download
memory/2668-2-0x0000000074330000-0x0000000074A1E000-memory.dmp

Filesize
6.9MB

Download
memory/2668-11-0x0000000074330000-0x0000000074A1E000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads