asyncrat | 0a5556be9428bb753fc53893a582fd42183762f198d830672666c706af6d6d78

Resubmissions

08-02-2023 12:31

230208-pqay3sag48 10

08-02-2023 12:16

230208-pfgc4saf92 10

Analysis

max time kernel
45s
max time network
135s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
08-02-2023 12:16

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General

Target

0A5556BE9428BB753FC53893A582FD42183762F198D83.exe
Size

47KB
MD5

725e1c369fb346eb8313e17fe8f7e328
SHA1

fbcdaa9b245834d26353b9ad10d26d180c696ac0
SHA256

0a5556be9428bb753fc53893a582fd42183762f198d830672666c706af6d6d78
SHA512

78676eb4182594c84c7e3a14b898fe0241eddd8a4ddfae2e154ee04c1a41773a92b1363c4aa3b2e42cb0871885864573038219526de32ae0352ae6858633c20e
SSDEEP

768:4oFKMJMj5I4G3y/Nu8+7lnu1c3fT89VnbC53tjbfgr3iAvj29nnmfJ7ClZF2tYch:4oFKMJeYBn6c3fT6i3lborScYnmfErF

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.6D

Botnet

Default

seznam.zapto.org:6606

seznam.zapto.org:7707

seznam.zapto.org:8808

milla11.publicvm.com:6606

milla11.publicvm.com:7707

milla11.publicvm.com:8808

Mutex

trffisyuiifgqcpeof

Attributes

delay
6
install
true
install_file
explorere.exe
install_folder
%AppData%

aes.plain

Signatures

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

Async RAT payload 4 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1388-54-0x0000000001290000-0x00000000012A2000-memory.dmp	asyncrat
C:\Users\Admin\AppData\Roaming\explorere.exe	asyncrat
C:\Users\Admin\AppData\Roaming\explorere.exe	asyncrat
behavioral1/memory/956-63-0x0000000000EF0000-0x0000000000F02000-memory.dmp	asyncrat

Executes dropped EXE 1 IoCs

Processes:

explorere.exe

pid process

956 explorere.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

1744 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

1072 timeout.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

0A5556BE9428BB753FC53893A582FD42183762F198D83.exe

pid process

1388 0A5556BE9428BB753FC53893A582FD42183762F198D83.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

0A5556BE9428BB753FC53893A582FD42183762F198D83.exeexplorere.exe

description pid process

Token: SeDebugPrivilege 1388 0A5556BE9428BB753FC53893A582FD42183762F198D83.exe
Token: SeDebugPrivilege 956 explorere.exe

pid	process
956	explorere.exe

pid	process
1744	schtasks.exe

pid	process
1072	timeout.exe

pid	process
1388	0A5556BE9428BB753FC53893A582FD42183762F198D83.exe

description	pid	process
Token: SeDebugPrivilege	1388	0A5556BE9428BB753FC53893A582FD42183762F198D83.exe
Token: SeDebugPrivilege	956	explorere.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

0A5556BE9428BB753FC53893A582FD42183762F198D83.execmd.execmd.exe

description	pid	process	target process
PID 1388 wrote to memory of 1488	1388	0A5556BE9428BB753FC53893A582FD42183762F198D83.exe	cmd.exe
PID 1388 wrote to memory of 1488	1388	0A5556BE9428BB753FC53893A582FD42183762F198D83.exe	cmd.exe
PID 1388 wrote to memory of 1488	1388	0A5556BE9428BB753FC53893A582FD42183762F198D83.exe	cmd.exe
PID 1388 wrote to memory of 552	1388	0A5556BE9428BB753FC53893A582FD42183762F198D83.exe	cmd.exe
PID 1388 wrote to memory of 552	1388	0A5556BE9428BB753FC53893A582FD42183762F198D83.exe	cmd.exe
PID 1388 wrote to memory of 552	1388	0A5556BE9428BB753FC53893A582FD42183762F198D83.exe	cmd.exe
PID 1488 wrote to memory of 1744	1488	cmd.exe	schtasks.exe
PID 1488 wrote to memory of 1744	1488	cmd.exe	schtasks.exe
PID 1488 wrote to memory of 1744	1488	cmd.exe	schtasks.exe
PID 552 wrote to memory of 1072	552	cmd.exe	timeout.exe
PID 552 wrote to memory of 1072	552	cmd.exe	timeout.exe
PID 552 wrote to memory of 1072	552	cmd.exe	timeout.exe
PID 552 wrote to memory of 956	552	cmd.exe	explorere.exe
PID 552 wrote to memory of 956	552	cmd.exe	explorere.exe
PID 552 wrote to memory of 956	552	cmd.exe	explorere.exe

C:\Users\Admin\AppData\Local\Temp\0A5556BE9428BB753FC53893A582FD42183762F198D83.exe
"C:\Users\Admin\AppData\Local\Temp\0A5556BE9428BB753FC53893A582FD42183762F198D83.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1388

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /ru system /rl highest /tn 0A5556BE9428BB753FC53893A582FD42183762F198D83 /tr '"C:\Users\Admin\AppData\Roaming\explorere.exe"' & exit
2⤵
- Suspicious use of WriteProcessMemory
PID:1488

C:\Windows\system32\schtasks.exe
schtasks /create /f /sc onlogon /ru system /rl highest /tn 0A5556BE9428BB753FC53893A582FD42183762F198D83 /tr '"C:\Users\Admin\AppData\Roaming\explorere.exe"'
3⤵
- Creates scheduled task(s)
PID:1744

C:\Windows\system32\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp3229.tmp.bat""
2⤵
- Suspicious use of WriteProcessMemory
PID:552

C:\Windows\system32\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:1072

C:\Users\Admin\AppData\Roaming\explorere.exe
"C:\Users\Admin\AppData\Roaming\explorere.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:956

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp3229.tmp.bat
Filesize
153B

MD5
174e1831eb445a292bbc7543d16c9fac

SHA1
68ccf7f30f5552023eec9ce2dbad2a1ff3fbb8a4

SHA256
f882109814009a8221d0e9cda1c7ba72df1886eea0f6bfd0f8689cae675987b5

SHA512
ca79576b3ea2bd16b2b7d480503d0ed9de3ad7dce2f612817388fae65349235165cbb8475133932a18ac689b8ab9b3548e29f54cd953987867c5953d48d04b16

Download Submit
C:\Users\Admin\AppData\Roaming\explorere.exe
Filesize
47KB

MD5
725e1c369fb346eb8313e17fe8f7e328

SHA1
fbcdaa9b245834d26353b9ad10d26d180c696ac0

SHA256
0a5556be9428bb753fc53893a582fd42183762f198d830672666c706af6d6d78

SHA512
78676eb4182594c84c7e3a14b898fe0241eddd8a4ddfae2e154ee04c1a41773a92b1363c4aa3b2e42cb0871885864573038219526de32ae0352ae6858633c20e

Download Submit
C:\Users\Admin\AppData\Roaming\explorere.exe
Filesize
47KB

MD5
725e1c369fb346eb8313e17fe8f7e328

SHA1
fbcdaa9b245834d26353b9ad10d26d180c696ac0

SHA256
0a5556be9428bb753fc53893a582fd42183762f198d830672666c706af6d6d78

SHA512
78676eb4182594c84c7e3a14b898fe0241eddd8a4ddfae2e154ee04c1a41773a92b1363c4aa3b2e42cb0871885864573038219526de32ae0352ae6858633c20e

Download Submit
memory/552-56-0x0000000000000000-mapping.dmp

Download
memory/956-60-0x0000000000000000-mapping.dmp

Download
memory/956-63-0x0000000000EF0000-0x0000000000F02000-memory.dmp

Filesize
72KB

Download
memory/1072-59-0x0000000000000000-mapping.dmp

Download
memory/1388-54-0x0000000001290000-0x00000000012A2000-memory.dmp

Filesize
72KB

Download
memory/1488-55-0x0000000000000000-mapping.dmp

Download
memory/1744-57-0x0000000000000000-mapping.dmp

Download