asyncrat | 90636b07f3e1ba7875174defe0e106aa1aa873960e3380e9cc9a5f0325bf13b6

General

Target

1096-57-0x00000000003B0000-0x00000000003C2000-memory.exe
Size

72KB
MD5

04ffd19d0f37dbfb88183ed3a2be3e16
SHA1

55fc97fab3e9bb8028d0f488bfce17b9516c503f
SHA256

90636b07f3e1ba7875174defe0e106aa1aa873960e3380e9cc9a5f0325bf13b6
SHA512

c40645de659bde18d34c336251eea7229c49d569cc7127691f188a4efb0e8fe2e10b84d0a45c4f24982cf732cb34ca2c3742d07af2d9b1d61ba7bf359f031ef4
SSDEEP

768:QoBLMxx0Fs4G7WHNaIx2FAhQ7CbEjbegr3iS/dbR8kClZN2tYcFmVc6K:QoBLMxmy2hfEbhrSS1bRorNKmVcl

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.6D

Botnet

Default

C2

milla.publicvm.com:6606

milla.publicvm.com:7707

milla.publicvm.com:8808

Mutex

urulyqqdpunjfhquxdy

Attributes

delay
8
install
true
install_file
folders.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/632-132-0x0000000000A30000-0x0000000000A42000-memory.dmp	asyncrat
C:\Users\Admin\AppData\Roaming\folders.exe	asyncrat
C:\Users\Admin\AppData\Roaming\folders.exe	asyncrat

Executes dropped EXE 1 IoCs

Processes:

folders.exe

pid process

3632 folders.exe

pid	process
3632	folders.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:

1096-57-0x00000000003B0000-0x00000000003C2000-memory.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	1096-57-0x00000000003B0000-0x00000000003C2000-memory.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

1232 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

3152 timeout.exe

pid	process
1232	schtasks.exe

pid	process
3152	timeout.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

Processes:

1096-57-0x00000000003B0000-0x00000000003C2000-memory.exe

pid	process
632	1096-57-0x00000000003B0000-0x00000000003C2000-memory.exe
632	1096-57-0x00000000003B0000-0x00000000003C2000-memory.exe
632	1096-57-0x00000000003B0000-0x00000000003C2000-memory.exe
632	1096-57-0x00000000003B0000-0x00000000003C2000-memory.exe
632	1096-57-0x00000000003B0000-0x00000000003C2000-memory.exe
632	1096-57-0x00000000003B0000-0x00000000003C2000-memory.exe
632	1096-57-0x00000000003B0000-0x00000000003C2000-memory.exe
632	1096-57-0x00000000003B0000-0x00000000003C2000-memory.exe
632	1096-57-0x00000000003B0000-0x00000000003C2000-memory.exe
632	1096-57-0x00000000003B0000-0x00000000003C2000-memory.exe
632	1096-57-0x00000000003B0000-0x00000000003C2000-memory.exe
632	1096-57-0x00000000003B0000-0x00000000003C2000-memory.exe
632	1096-57-0x00000000003B0000-0x00000000003C2000-memory.exe
632	1096-57-0x00000000003B0000-0x00000000003C2000-memory.exe
632	1096-57-0x00000000003B0000-0x00000000003C2000-memory.exe
632	1096-57-0x00000000003B0000-0x00000000003C2000-memory.exe
632	1096-57-0x00000000003B0000-0x00000000003C2000-memory.exe
632	1096-57-0x00000000003B0000-0x00000000003C2000-memory.exe
632	1096-57-0x00000000003B0000-0x00000000003C2000-memory.exe
632	1096-57-0x00000000003B0000-0x00000000003C2000-memory.exe
632	1096-57-0x00000000003B0000-0x00000000003C2000-memory.exe
632	1096-57-0x00000000003B0000-0x00000000003C2000-memory.exe
632	1096-57-0x00000000003B0000-0x00000000003C2000-memory.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

1096-57-0x00000000003B0000-0x00000000003C2000-memory.exefolders.exe

description pid process

Token: SeDebugPrivilege 632 1096-57-0x00000000003B0000-0x00000000003C2000-memory.exe
Token: SeDebugPrivilege 3632 folders.exe

description	pid	process
Token: SeDebugPrivilege	632	1096-57-0x00000000003B0000-0x00000000003C2000-memory.exe
Token: SeDebugPrivilege	3632	folders.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

1096-57-0x00000000003B0000-0x00000000003C2000-memory.execmd.execmd.exe

description	pid	process	target process
PID 632 wrote to memory of 4348	632	1096-57-0x00000000003B0000-0x00000000003C2000-memory.exe	cmd.exe
PID 632 wrote to memory of 4348	632	1096-57-0x00000000003B0000-0x00000000003C2000-memory.exe	cmd.exe
PID 632 wrote to memory of 5116	632	1096-57-0x00000000003B0000-0x00000000003C2000-memory.exe	cmd.exe
PID 632 wrote to memory of 5116	632	1096-57-0x00000000003B0000-0x00000000003C2000-memory.exe	cmd.exe
PID 4348 wrote to memory of 1232	4348	cmd.exe	schtasks.exe
PID 4348 wrote to memory of 1232	4348	cmd.exe	schtasks.exe
PID 5116 wrote to memory of 3152	5116	cmd.exe	timeout.exe
PID 5116 wrote to memory of 3152	5116	cmd.exe	timeout.exe
PID 5116 wrote to memory of 3632	5116	cmd.exe	folders.exe
PID 5116 wrote to memory of 3632	5116	cmd.exe	folders.exe

C:\Users\Admin\AppData\Local\Temp\1096-57-0x00000000003B0000-0x00000000003C2000-memory.exe
"C:\Users\Admin\AppData\Local\Temp\1096-57-0x00000000003B0000-0x00000000003C2000-memory.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:632

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /ru system /rl highest /tn 1096-57-0x00000000003B0000-0x00000000003C2000-memory /tr '"C:\Users\Admin\AppData\Roaming\folders.exe"' & exit
2⤵
- Suspicious use of WriteProcessMemory
PID:4348

C:\Windows\system32\schtasks.exe
schtasks /create /f /sc onlogon /ru system /rl highest /tn 1096-57-0x00000000003B0000-0x00000000003C2000-memory /tr '"C:\Users\Admin\AppData\Roaming\folders.exe"'
3⤵
- Creates scheduled task(s)
PID:1232

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp12DC.tmp.bat""
2⤵
- Suspicious use of WriteProcessMemory
PID:5116

C:\Windows\system32\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:3152

C:\Users\Admin\AppData\Roaming\folders.exe
"C:\Users\Admin\AppData\Roaming\folders.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3632

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\tmp12DC.tmp.bat
Filesize
151B

MD5
e15ed499a7f23aa1db906869e87a9499

SHA1
7c3af578f1e0a706c1d9991403fa0e7afba5b217

SHA256
2c284d690dcf9dce5f3733b04ff3d07a4b252df5625cd8cb2527cd8412a0b521

SHA512
0ed6bbfc41fe960746a7e03ab56c1a36f126cb908abdf83622e778d9dd6025ae383e14ddf711f704ed9a18334f7c7ae4a9f967dad6bf136f08d24e426720eb14

Download Submit
C:\Users\Admin\AppData\Roaming\folders.exe
Filesize
72KB

MD5
04ffd19d0f37dbfb88183ed3a2be3e16

SHA1
55fc97fab3e9bb8028d0f488bfce17b9516c503f

SHA256
90636b07f3e1ba7875174defe0e106aa1aa873960e3380e9cc9a5f0325bf13b6

SHA512
c40645de659bde18d34c336251eea7229c49d569cc7127691f188a4efb0e8fe2e10b84d0a45c4f24982cf732cb34ca2c3742d07af2d9b1d61ba7bf359f031ef4

Download Submit
C:\Users\Admin\AppData\Roaming\folders.exe
Filesize
72KB

MD5
04ffd19d0f37dbfb88183ed3a2be3e16

SHA1
55fc97fab3e9bb8028d0f488bfce17b9516c503f

SHA256
90636b07f3e1ba7875174defe0e106aa1aa873960e3380e9cc9a5f0325bf13b6

SHA512
c40645de659bde18d34c336251eea7229c49d569cc7127691f188a4efb0e8fe2e10b84d0a45c4f24982cf732cb34ca2c3742d07af2d9b1d61ba7bf359f031ef4

Download Submit
memory/632-132-0x0000000000A30000-0x0000000000A42000-memory.dmp

Filesize
72KB

Download
memory/632-133-0x00007FFA79D60000-0x00007FFA7A821000-memory.dmp

Filesize
10.8MB

Download
memory/632-134-0x00007FFA79D60000-0x00007FFA7A821000-memory.dmp

Filesize
10.8MB

Download
memory/632-137-0x00007FFA79D60000-0x00007FFA7A821000-memory.dmp

Filesize
10.8MB

Download
memory/1232-139-0x0000000000000000-mapping.dmp

Download
memory/3152-140-0x0000000000000000-mapping.dmp

Download
memory/3632-141-0x0000000000000000-mapping.dmp

Download
memory/3632-144-0x00007FFA79E10000-0x00007FFA7A8D1000-memory.dmp

Filesize
10.8MB

Download
memory/3632-145-0x00007FFA79E10000-0x00007FFA7A8D1000-memory.dmp

Filesize
10.8MB

Download
memory/4348-135-0x0000000000000000-mapping.dmp

Download
memory/5116-136-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads