asyncrat | 462aaf8e8e3b24971ba01ed91ed0ac25d9338b9c5d349940fceb4efc417b1f50

General

Target

462aaf8e8e3b24971ba01ed91ed0ac25d9338b9c5d349940fceb4efc417b1f50.exe
Size

45KB
MD5

a94d4c11a6306297173a962f32c2f8a9
SHA1

cd28ba44b0066e51005abfe8e359230b9988adc6
SHA256

462aaf8e8e3b24971ba01ed91ed0ac25d9338b9c5d349940fceb4efc417b1f50
SHA512

41e43ec5a6a41b81aa27696b51409596d3b10cc5e77195c7cb2d9cb2b3ed44d482ca60915f275ff1cc4a38e60e242138ff32e8cc8628f860624176b09696a7f3
SSDEEP

768:eukaVT3ongoWU2Gjimo2qruaHyvCiPIPejblgX3i9MsXOs2sgNGB+VBDZKx:eukaVT3Q+26BPSbiXS6s2sgNG2dKx

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:8808

Mutex

zmjOiBi4Y8Ra

Attributes

delay
3
install
true
install_file
testng.exe
install_folder
%Temp%

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

Processes:

resource	yara_rule
\Users\Admin\AppData\Local\Temp\testng.exe	family_asyncrat

Executes dropped EXE 1 IoCs

Processes:

testng.exe

pid process

2388 testng.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

2732 cmd.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2388	testng.exe

pid	process
2732	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

Processes:

cmd.execmd.exetimeout.exeschtasks.exetestng.exe462aaf8e8e3b24971ba01ed91ed0ac25d9338b9c5d349940fceb4efc417b1f50.exe

description	ioc	process
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	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	testng.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	462aaf8e8e3b24971ba01ed91ed0ac25d9338b9c5d349940fceb4efc417b1f50.exe

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

2720 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

Processes:

schtasks.exe

pid process

2692 schtasks.exe

pid	process
2720	timeout.exe

pid	process
2692	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

462aaf8e8e3b24971ba01ed91ed0ac25d9338b9c5d349940fceb4efc417b1f50.exe

pid	process
2876	462aaf8e8e3b24971ba01ed91ed0ac25d9338b9c5d349940fceb4efc417b1f50.exe
2876	462aaf8e8e3b24971ba01ed91ed0ac25d9338b9c5d349940fceb4efc417b1f50.exe
2876	462aaf8e8e3b24971ba01ed91ed0ac25d9338b9c5d349940fceb4efc417b1f50.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

462aaf8e8e3b24971ba01ed91ed0ac25d9338b9c5d349940fceb4efc417b1f50.exetestng.exe

description	pid	process
Token: SeDebugPrivilege	2876	462aaf8e8e3b24971ba01ed91ed0ac25d9338b9c5d349940fceb4efc417b1f50.exe
Token: SeDebugPrivilege	2388	testng.exe
Token: SeDebugPrivilege	2388	testng.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

462aaf8e8e3b24971ba01ed91ed0ac25d9338b9c5d349940fceb4efc417b1f50.execmd.execmd.exe

description	pid	process	target process
PID 2876 wrote to memory of 2704	2876	462aaf8e8e3b24971ba01ed91ed0ac25d9338b9c5d349940fceb4efc417b1f50.exe	cmd.exe
PID 2876 wrote to memory of 2704	2876	462aaf8e8e3b24971ba01ed91ed0ac25d9338b9c5d349940fceb4efc417b1f50.exe	cmd.exe
PID 2876 wrote to memory of 2704	2876	462aaf8e8e3b24971ba01ed91ed0ac25d9338b9c5d349940fceb4efc417b1f50.exe	cmd.exe
PID 2876 wrote to memory of 2704	2876	462aaf8e8e3b24971ba01ed91ed0ac25d9338b9c5d349940fceb4efc417b1f50.exe	cmd.exe
PID 2876 wrote to memory of 2732	2876	462aaf8e8e3b24971ba01ed91ed0ac25d9338b9c5d349940fceb4efc417b1f50.exe	cmd.exe
PID 2876 wrote to memory of 2732	2876	462aaf8e8e3b24971ba01ed91ed0ac25d9338b9c5d349940fceb4efc417b1f50.exe	cmd.exe
PID 2876 wrote to memory of 2732	2876	462aaf8e8e3b24971ba01ed91ed0ac25d9338b9c5d349940fceb4efc417b1f50.exe	cmd.exe
PID 2876 wrote to memory of 2732	2876	462aaf8e8e3b24971ba01ed91ed0ac25d9338b9c5d349940fceb4efc417b1f50.exe	cmd.exe
PID 2704 wrote to memory of 2692	2704	cmd.exe	schtasks.exe
PID 2704 wrote to memory of 2692	2704	cmd.exe	schtasks.exe
PID 2704 wrote to memory of 2692	2704	cmd.exe	schtasks.exe
PID 2704 wrote to memory of 2692	2704	cmd.exe	schtasks.exe
PID 2732 wrote to memory of 2720	2732	cmd.exe	timeout.exe
PID 2732 wrote to memory of 2720	2732	cmd.exe	timeout.exe
PID 2732 wrote to memory of 2720	2732	cmd.exe	timeout.exe
PID 2732 wrote to memory of 2720	2732	cmd.exe	timeout.exe
PID 2732 wrote to memory of 2388	2732	cmd.exe	testng.exe
PID 2732 wrote to memory of 2388	2732	cmd.exe	testng.exe
PID 2732 wrote to memory of 2388	2732	cmd.exe	testng.exe
PID 2732 wrote to memory of 2388	2732	cmd.exe	testng.exe

C:\Users\Admin\AppData\Local\Temp\462aaf8e8e3b24971ba01ed91ed0ac25d9338b9c5d349940fceb4efc417b1f50.exe
"C:\Users\Admin\AppData\Local\Temp\462aaf8e8e3b24971ba01ed91ed0ac25d9338b9c5d349940fceb4efc417b1f50.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2876

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "testng" /tr '"C:\Users\Admin\AppData\Local\Temp\testng.exe"' & exit
2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2704

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "testng" /tr '"C:\Users\Admin\AppData\Local\Temp\testng.exe"'
3⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:2692

C:\Windows\SysWOW64\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp713A.tmp.bat""
2⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2732

C:\Windows\SysWOW64\timeout.exe
timeout 3
3⤵
- System Location Discovery: System Language Discovery
- Delays execution with timeout.exe
PID:2720

C:\Users\Admin\AppData\Local\Temp\testng.exe
"C:\Users\Admin\AppData\Local\Temp\testng.exe"
3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2388

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmp713A.tmp.bat

Filesize
153B

MD5
3f506ca7855ba066f01f951b0010e6fe

SHA1
fc2a101bd2875b1a96778bf61efb7e84023cecdd

SHA256
15e02d88e1b5c0e292bb9839d2a995620a4e3831bec9f58be0f472d54042a08a

SHA512
d05ab140fd25f1e288abff3add978e0cf67d88e8c012508c6140467021b7ba40a3f28d210cf89cefb8e78c995efb8a550e9f6bd2b0a74ad4463bc57f780f5c8d

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

Filesize
45KB

MD5
a94d4c11a6306297173a962f32c2f8a9

SHA1
cd28ba44b0066e51005abfe8e359230b9988adc6

SHA256
462aaf8e8e3b24971ba01ed91ed0ac25d9338b9c5d349940fceb4efc417b1f50

SHA512
41e43ec5a6a41b81aa27696b51409596d3b10cc5e77195c7cb2d9cb2b3ed44d482ca60915f275ff1cc4a38e60e242138ff32e8cc8628f860624176b09696a7f3

Download Submit
memory/2388-16-0x0000000001340000-0x0000000001352000-memory.dmp

Filesize
72KB

Download
memory/2876-0-0x0000000074CCE000-0x0000000074CCF000-memory.dmp

Filesize
4KB

Download
memory/2876-1-0x00000000010E0000-0x00000000010F2000-memory.dmp

Filesize
72KB

Download
memory/2876-2-0x0000000074CC0000-0x00000000753AE000-memory.dmp

Filesize
6.9MB

Download
memory/2876-12-0x0000000074CC0000-0x00000000753AE000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads