asyncrat | 120cdab22661efc232e872f45c5c42cee1f33f4b23996596bbffc1fe9cde1a03

General

Target

2760-2-0x0000000000220000-0x0000000000232000-memory.exe
Size

72KB
MD5

abae485c5bb08a3c3d973a9f0bf4909f
SHA1

7ab206b8de7e8e2757c25c0144164d337c454d43
SHA256

120cdab22661efc232e872f45c5c42cee1f33f4b23996596bbffc1fe9cde1a03
SHA512

890f360d52682b445f076c960ab6aa0babb5bd569bb8d54babecbb2ed266143c3746cccb7875f7589beabd8c0c64b66e4cfcf5629e43750a8b2547c40a33c42c
SSDEEP

1536:yu270TceH2+nszByYfUlbAoEb7uYHTF25bxzlxOU0d+c:yu2oTceH2+szByYfUlbAoEb7uYB2jh0d

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

54.253.7.109:4447

Mutex

XqcNee3124zJ

Attributes

delay
21
install
true
install_file
service.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

Processes:

resource	yara_rule
\Users\Admin\AppData\Roaming\service.exe	family_asyncrat

Executes dropped EXE 1 IoCs

Processes:

service.exe

pid process

2712 service.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

2784 cmd.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2712	service.exe

pid	process
2784	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:

2760-2-0x0000000000220000-0x0000000000232000-memory.execmd.exeschtasks.execmd.exetimeout.exeservice.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2760-2-0x0000000000220000-0x0000000000232000-memory.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	service.exe

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

2888 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

2680 schtasks.exe

pid	process
2888	timeout.exe

pid	process
2680	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

2760-2-0x0000000000220000-0x0000000000232000-memory.exe

pid	process
2316	2760-2-0x0000000000220000-0x0000000000232000-memory.exe
2316	2760-2-0x0000000000220000-0x0000000000232000-memory.exe
2316	2760-2-0x0000000000220000-0x0000000000232000-memory.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

2760-2-0x0000000000220000-0x0000000000232000-memory.exeservice.exe

description	pid	process
Token: SeDebugPrivilege	2316	2760-2-0x0000000000220000-0x0000000000232000-memory.exe
Token: SeDebugPrivilege	2712	service.exe
Token: SeDebugPrivilege	2712	service.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

2760-2-0x0000000000220000-0x0000000000232000-memory.execmd.execmd.exe

description	pid	process	target process
PID 2316 wrote to memory of 2756	2316	2760-2-0x0000000000220000-0x0000000000232000-memory.exe	cmd.exe
PID 2316 wrote to memory of 2756	2316	2760-2-0x0000000000220000-0x0000000000232000-memory.exe	cmd.exe
PID 2316 wrote to memory of 2756	2316	2760-2-0x0000000000220000-0x0000000000232000-memory.exe	cmd.exe
PID 2316 wrote to memory of 2756	2316	2760-2-0x0000000000220000-0x0000000000232000-memory.exe	cmd.exe
PID 2316 wrote to memory of 2784	2316	2760-2-0x0000000000220000-0x0000000000232000-memory.exe	cmd.exe
PID 2316 wrote to memory of 2784	2316	2760-2-0x0000000000220000-0x0000000000232000-memory.exe	cmd.exe
PID 2316 wrote to memory of 2784	2316	2760-2-0x0000000000220000-0x0000000000232000-memory.exe	cmd.exe
PID 2316 wrote to memory of 2784	2316	2760-2-0x0000000000220000-0x0000000000232000-memory.exe	cmd.exe
PID 2756 wrote to memory of 2680	2756	cmd.exe	schtasks.exe
PID 2756 wrote to memory of 2680	2756	cmd.exe	schtasks.exe
PID 2756 wrote to memory of 2680	2756	cmd.exe	schtasks.exe
PID 2756 wrote to memory of 2680	2756	cmd.exe	schtasks.exe
PID 2784 wrote to memory of 2888	2784	cmd.exe	timeout.exe
PID 2784 wrote to memory of 2888	2784	cmd.exe	timeout.exe
PID 2784 wrote to memory of 2888	2784	cmd.exe	timeout.exe
PID 2784 wrote to memory of 2888	2784	cmd.exe	timeout.exe
PID 2784 wrote to memory of 2712	2784	cmd.exe	service.exe
PID 2784 wrote to memory of 2712	2784	cmd.exe	service.exe
PID 2784 wrote to memory of 2712	2784	cmd.exe	service.exe
PID 2784 wrote to memory of 2712	2784	cmd.exe	service.exe

C:\Users\Admin\AppData\Local\Temp\2760-2-0x0000000000220000-0x0000000000232000-memory.exe
"C:\Users\Admin\AppData\Local\Temp\2760-2-0x0000000000220000-0x0000000000232000-memory.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2316

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "service" /tr '"C:\Users\Admin\AppData\Roaming\service.exe"' & exit
2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2756

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "service" /tr '"C:\Users\Admin\AppData\Roaming\service.exe"'
3⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:2680

C:\Windows\SysWOW64\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp38AD.tmp.bat""
2⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2784

C:\Windows\SysWOW64\timeout.exe
timeout 3
3⤵
- System Location Discovery: System Language Discovery
- Delays execution with timeout.exe
PID:2888

C:\Users\Admin\AppData\Roaming\service.exe
"C:\Users\Admin\AppData\Roaming\service.exe"
3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2712

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\tmp38AD.tmp.bat

Filesize
151B

MD5
fd9bc6ab70d33a0f2036164f154feef0

SHA1
5d93a8e1abb6a96781e5d8d2d1f3b4a47092c941

SHA256
bc4c7e6bea3631956aaa09a8441b25b9c6f597f3917e1c298ac1248cdd75e2f0

SHA512
bf96db9204df6763db8fca432cc1aefba7c9b7993566200897c70488859473386b5589ea0aeafdc1ddbc5cc3871fbc1b8f41add8121c02504c20a74eb6a451f3

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

Filesize
72KB

MD5
abae485c5bb08a3c3d973a9f0bf4909f

SHA1
7ab206b8de7e8e2757c25c0144164d337c454d43

SHA256
120cdab22661efc232e872f45c5c42cee1f33f4b23996596bbffc1fe9cde1a03

SHA512
890f360d52682b445f076c960ab6aa0babb5bd569bb8d54babecbb2ed266143c3746cccb7875f7589beabd8c0c64b66e4cfcf5629e43750a8b2547c40a33c42c

Download Submit
memory/2316-0-0x000000007489E000-0x000000007489F000-memory.dmp

Filesize
4KB

Download
memory/2316-1-0x0000000000830000-0x0000000000842000-memory.dmp

Filesize
72KB

Download
memory/2316-2-0x000000007489E000-0x000000007489F000-memory.dmp

Filesize
4KB

Download
memory/2316-3-0x0000000074890000-0x0000000074F7E000-memory.dmp

Filesize
6.9MB

Download
memory/2316-12-0x0000000074890000-0x0000000074F7E000-memory.dmp

Filesize
6.9MB

Download
memory/2712-17-0x0000000001070000-0x0000000001082000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads