asyncrat | 367286675076c14b4d7adedc674cd1902200003f703975bbfae71f5dfcdc18a6

General

Target

5bc149b7d429710d7539e6de3b655a11.exe
Size

208KB
MD5

5bc149b7d429710d7539e6de3b655a11
SHA1

7e32474bb18bad87408c0e8379acf563224dd5f4
SHA256

367286675076c14b4d7adedc674cd1902200003f703975bbfae71f5dfcdc18a6
SHA512

3a08d5571f4b0ce71a5d92a459b465c04d91a55abbf0ca5ebfc1d888ba10c1f50f0f5ec5ad8e1619d8403af154fd2af3536c26a7ca5d2a61fbee1028421f6648
SSDEEP

1536:sugPNTcI42LJ0dU33bIXSXLlgR6MdDID9tn4ICYlx:sug1TcI42LKG33bIJRNVW9tn4IDlx

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

2.59.119.84:7943

Mutex

AsyncMutex_6SI8OkPnk

Attributes

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

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat

Async RAT payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/5040-132-0x0000000000760000-0x000000000079A000-memory.dmp	asyncrat
C:\Users\Admin\AppData\Roaming\zula.exe	asyncrat
C:\Users\Admin\AppData\Roaming\zula.exe	asyncrat

Executes dropped EXE 1 IoCs

Processes:

zula.exe

pid process

2984 zula.exe

pid	process
2984	zula.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

5bc149b7d429710d7539e6de3b655a11.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	5bc149b7d429710d7539e6de3b655a11.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

1068 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

1632 timeout.exe

pid	process
1068	schtasks.exe

pid	process
1632	timeout.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

Processes:

5bc149b7d429710d7539e6de3b655a11.exe

pid	process
5040	5bc149b7d429710d7539e6de3b655a11.exe
5040	5bc149b7d429710d7539e6de3b655a11.exe
5040	5bc149b7d429710d7539e6de3b655a11.exe
5040	5bc149b7d429710d7539e6de3b655a11.exe
5040	5bc149b7d429710d7539e6de3b655a11.exe
5040	5bc149b7d429710d7539e6de3b655a11.exe
5040	5bc149b7d429710d7539e6de3b655a11.exe
5040	5bc149b7d429710d7539e6de3b655a11.exe
5040	5bc149b7d429710d7539e6de3b655a11.exe
5040	5bc149b7d429710d7539e6de3b655a11.exe
5040	5bc149b7d429710d7539e6de3b655a11.exe
5040	5bc149b7d429710d7539e6de3b655a11.exe
5040	5bc149b7d429710d7539e6de3b655a11.exe
5040	5bc149b7d429710d7539e6de3b655a11.exe
5040	5bc149b7d429710d7539e6de3b655a11.exe
5040	5bc149b7d429710d7539e6de3b655a11.exe
5040	5bc149b7d429710d7539e6de3b655a11.exe
5040	5bc149b7d429710d7539e6de3b655a11.exe
5040	5bc149b7d429710d7539e6de3b655a11.exe
5040	5bc149b7d429710d7539e6de3b655a11.exe
5040	5bc149b7d429710d7539e6de3b655a11.exe
5040	5bc149b7d429710d7539e6de3b655a11.exe
5040	5bc149b7d429710d7539e6de3b655a11.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

5bc149b7d429710d7539e6de3b655a11.exezula.exe

description pid process

Token: SeDebugPrivilege 5040 5bc149b7d429710d7539e6de3b655a11.exe
Token: SeDebugPrivilege 2984 zula.exe

description	pid	process
Token: SeDebugPrivilege	5040	5bc149b7d429710d7539e6de3b655a11.exe
Token: SeDebugPrivilege	2984	zula.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

5bc149b7d429710d7539e6de3b655a11.execmd.execmd.exe

description	pid	process	target process
PID 5040 wrote to memory of 2448	5040	5bc149b7d429710d7539e6de3b655a11.exe	cmd.exe
PID 5040 wrote to memory of 2448	5040	5bc149b7d429710d7539e6de3b655a11.exe	cmd.exe
PID 5040 wrote to memory of 2448	5040	5bc149b7d429710d7539e6de3b655a11.exe	cmd.exe
PID 5040 wrote to memory of 4584	5040	5bc149b7d429710d7539e6de3b655a11.exe	cmd.exe
PID 5040 wrote to memory of 4584	5040	5bc149b7d429710d7539e6de3b655a11.exe	cmd.exe
PID 5040 wrote to memory of 4584	5040	5bc149b7d429710d7539e6de3b655a11.exe	cmd.exe
PID 2448 wrote to memory of 1068	2448	cmd.exe	schtasks.exe
PID 2448 wrote to memory of 1068	2448	cmd.exe	schtasks.exe
PID 2448 wrote to memory of 1068	2448	cmd.exe	schtasks.exe
PID 4584 wrote to memory of 1632	4584	cmd.exe	timeout.exe
PID 4584 wrote to memory of 1632	4584	cmd.exe	timeout.exe
PID 4584 wrote to memory of 1632	4584	cmd.exe	timeout.exe
PID 4584 wrote to memory of 2984	4584	cmd.exe	zula.exe
PID 4584 wrote to memory of 2984	4584	cmd.exe	zula.exe
PID 4584 wrote to memory of 2984	4584	cmd.exe	zula.exe

C:\Users\Admin\AppData\Local\Temp\5bc149b7d429710d7539e6de3b655a11.exe
"C:\Users\Admin\AppData\Local\Temp\5bc149b7d429710d7539e6de3b655a11.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5040

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "zula" /tr '"C:\Users\Admin\AppData\Roaming\zula.exe"' & exit
2⤵
- Suspicious use of WriteProcessMemory
PID:2448

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "zula" /tr '"C:\Users\Admin\AppData\Roaming\zula.exe"'
3⤵
- Creates scheduled task(s)
PID:1068

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpCE13.tmp.bat""
2⤵
- Suspicious use of WriteProcessMemory
PID:4584

C:\Windows\SysWOW64\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:1632

C:\Users\Admin\AppData\Roaming\zula.exe
"C:\Users\Admin\AppData\Roaming\zula.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2984

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpCE13.tmp.bat
Filesize
148B

MD5
54384e385e164890853aadae2c785475

SHA1
544b9e15d163393a77c619f292a7fad5d7cccad7

SHA256
207ab9c5197ba148a4db3559e079e1962cba3ac26ed68d05bf80bdce2c80a814

SHA512
eb660cb1e6f6dec5289e137add360e4c855527bacd3830459e774f3580c1bf51d6ede96e5486cbdbdd67a6f23f44051265545543f7610fe935cd85a0e17456cb

Download Submit
C:\Users\Admin\AppData\Roaming\zula.exe
Filesize
208KB

MD5
5bc149b7d429710d7539e6de3b655a11

SHA1
7e32474bb18bad87408c0e8379acf563224dd5f4

SHA256
367286675076c14b4d7adedc674cd1902200003f703975bbfae71f5dfcdc18a6

SHA512
3a08d5571f4b0ce71a5d92a459b465c04d91a55abbf0ca5ebfc1d888ba10c1f50f0f5ec5ad8e1619d8403af154fd2af3536c26a7ca5d2a61fbee1028421f6648

Download Submit
C:\Users\Admin\AppData\Roaming\zula.exe
Filesize
208KB

MD5
5bc149b7d429710d7539e6de3b655a11

SHA1
7e32474bb18bad87408c0e8379acf563224dd5f4

SHA256
367286675076c14b4d7adedc674cd1902200003f703975bbfae71f5dfcdc18a6

SHA512
3a08d5571f4b0ce71a5d92a459b465c04d91a55abbf0ca5ebfc1d888ba10c1f50f0f5ec5ad8e1619d8403af154fd2af3536c26a7ca5d2a61fbee1028421f6648

Download Submit
memory/1068-136-0x0000000000000000-mapping.dmp

Download
memory/1632-138-0x0000000000000000-mapping.dmp

Download
memory/2448-134-0x0000000000000000-mapping.dmp

Download
memory/2984-139-0x0000000000000000-mapping.dmp

Download
memory/2984-142-0x0000000005E10000-0x00000000063B4000-memory.dmp

Filesize
5.6MB

Download
memory/2984-143-0x0000000005250000-0x00000000052B6000-memory.dmp

Filesize
408KB

Download
memory/4584-135-0x0000000000000000-mapping.dmp

Download
memory/5040-132-0x0000000000760000-0x000000000079A000-memory.dmp

Filesize
232KB

Download
memory/5040-133-0x0000000005410000-0x00000000054AC000-memory.dmp

Filesize
624KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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