asyncrat | 45e87ee0b025a7e4a783a6786564982e7735c8c50d0b3d84a3d5dd90ce735cfe

General

Target

10135b39a4a6d8717ba8ceec380ef060.exe
Size

48KB
MD5

10135b39a4a6d8717ba8ceec380ef060
SHA1

3669c101670b0b373dea1c7729718340196da4bc
SHA256

45e87ee0b025a7e4a783a6786564982e7735c8c50d0b3d84a3d5dd90ce735cfe
SHA512

71cc73fbb213529a14fb94c56f1a056ae5db940a7aac22079ae9a238a9633ddd64b7d8ff9b3a023051c9d6cfbbed48e90f14f2e17a2f6893ae9b3b6f46dd31ee

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

61.14.233.88:6606

61.14.233.88:7707

61.14.233.88:8808

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
svchost.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/4624-130-0x0000000000CD0000-0x0000000000CE2000-memory.dmp	asyncrat
C:\Users\Admin\AppData\Roaming\svchost.exe	asyncrat
C:\Users\Admin\AppData\Roaming\svchost.exe	asyncrat

Executes dropped EXE 1 IoCs

Processes:

svchost.exe

pid process

1280 svchost.exe

pid	process
1280	svchost.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:

10135b39a4a6d8717ba8ceec380ef060.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2660308776-3705150086-26593515-1000\Control Panel\International\Geo\Nation	10135b39a4a6d8717ba8ceec380ef060.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

4032 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

448 timeout.exe

pid	process
4032	schtasks.exe

pid	process
448	timeout.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

Processes:

10135b39a4a6d8717ba8ceec380ef060.exe

pid	process
4624	10135b39a4a6d8717ba8ceec380ef060.exe
4624	10135b39a4a6d8717ba8ceec380ef060.exe
4624	10135b39a4a6d8717ba8ceec380ef060.exe
4624	10135b39a4a6d8717ba8ceec380ef060.exe
4624	10135b39a4a6d8717ba8ceec380ef060.exe
4624	10135b39a4a6d8717ba8ceec380ef060.exe
4624	10135b39a4a6d8717ba8ceec380ef060.exe
4624	10135b39a4a6d8717ba8ceec380ef060.exe
4624	10135b39a4a6d8717ba8ceec380ef060.exe
4624	10135b39a4a6d8717ba8ceec380ef060.exe
4624	10135b39a4a6d8717ba8ceec380ef060.exe
4624	10135b39a4a6d8717ba8ceec380ef060.exe
4624	10135b39a4a6d8717ba8ceec380ef060.exe
4624	10135b39a4a6d8717ba8ceec380ef060.exe
4624	10135b39a4a6d8717ba8ceec380ef060.exe
4624	10135b39a4a6d8717ba8ceec380ef060.exe
4624	10135b39a4a6d8717ba8ceec380ef060.exe
4624	10135b39a4a6d8717ba8ceec380ef060.exe
4624	10135b39a4a6d8717ba8ceec380ef060.exe
4624	10135b39a4a6d8717ba8ceec380ef060.exe
4624	10135b39a4a6d8717ba8ceec380ef060.exe
4624	10135b39a4a6d8717ba8ceec380ef060.exe
4624	10135b39a4a6d8717ba8ceec380ef060.exe
4624	10135b39a4a6d8717ba8ceec380ef060.exe
4624	10135b39a4a6d8717ba8ceec380ef060.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

10135b39a4a6d8717ba8ceec380ef060.exesvchost.exe

description pid process

Token: SeDebugPrivilege 4624 10135b39a4a6d8717ba8ceec380ef060.exe
Token: SeDebugPrivilege 1280 svchost.exe

description	pid	process
Token: SeDebugPrivilege	4624	10135b39a4a6d8717ba8ceec380ef060.exe
Token: SeDebugPrivilege	1280	svchost.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

10135b39a4a6d8717ba8ceec380ef060.execmd.execmd.exe

description	pid	process	target process
PID 4624 wrote to memory of 4580	4624	10135b39a4a6d8717ba8ceec380ef060.exe	cmd.exe
PID 4624 wrote to memory of 4580	4624	10135b39a4a6d8717ba8ceec380ef060.exe	cmd.exe
PID 4624 wrote to memory of 4580	4624	10135b39a4a6d8717ba8ceec380ef060.exe	cmd.exe
PID 4624 wrote to memory of 612	4624	10135b39a4a6d8717ba8ceec380ef060.exe	cmd.exe
PID 4624 wrote to memory of 612	4624	10135b39a4a6d8717ba8ceec380ef060.exe	cmd.exe
PID 4624 wrote to memory of 612	4624	10135b39a4a6d8717ba8ceec380ef060.exe	cmd.exe
PID 612 wrote to memory of 448	612	cmd.exe	timeout.exe
PID 612 wrote to memory of 448	612	cmd.exe	timeout.exe
PID 612 wrote to memory of 448	612	cmd.exe	timeout.exe
PID 4580 wrote to memory of 4032	4580	cmd.exe	schtasks.exe
PID 4580 wrote to memory of 4032	4580	cmd.exe	schtasks.exe
PID 4580 wrote to memory of 4032	4580	cmd.exe	schtasks.exe
PID 612 wrote to memory of 1280	612	cmd.exe	svchost.exe
PID 612 wrote to memory of 1280	612	cmd.exe	svchost.exe
PID 612 wrote to memory of 1280	612	cmd.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\10135b39a4a6d8717ba8ceec380ef060.exe
"C:\Users\Admin\AppData\Local\Temp\10135b39a4a6d8717ba8ceec380ef060.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4624

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"' & exit
2⤵
- Suspicious use of WriteProcessMemory
PID:4580

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"'
3⤵
- Creates scheduled task(s)
PID:4032

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpC856.tmp.bat""
2⤵
- Suspicious use of WriteProcessMemory
PID:612

C:\Windows\SysWOW64\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:448

C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1280

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\tmpC856.tmp.bat
Filesize
151B

MD5
1da2cb1f8c1e93f18c60597e123b2ba7

SHA1
354c7421e32ce105af93ef7a2e73d72e28e52401

SHA256
68a006006c17a49839744a775bc3144de211498949a213309d901b0fd993b6ed

SHA512
f92344835d45ad05ca6e1d5a03bb342f10536b6f8fc796a89c536da121b5d98d3957a17a3aad51edcd77ef456ba954701d6590900a83ac7057d3f76334c9d05f

Download Submit
C:\Users\Admin\AppData\Roaming\svchost.exe
Filesize
48KB

MD5
10135b39a4a6d8717ba8ceec380ef060

SHA1
3669c101670b0b373dea1c7729718340196da4bc

SHA256
45e87ee0b025a7e4a783a6786564982e7735c8c50d0b3d84a3d5dd90ce735cfe

SHA512
71cc73fbb213529a14fb94c56f1a056ae5db940a7aac22079ae9a238a9633ddd64b7d8ff9b3a023051c9d6cfbbed48e90f14f2e17a2f6893ae9b3b6f46dd31ee

Download Submit
C:\Users\Admin\AppData\Roaming\svchost.exe
Filesize
48KB

MD5
10135b39a4a6d8717ba8ceec380ef060

SHA1
3669c101670b0b373dea1c7729718340196da4bc

SHA256
45e87ee0b025a7e4a783a6786564982e7735c8c50d0b3d84a3d5dd90ce735cfe

SHA512
71cc73fbb213529a14fb94c56f1a056ae5db940a7aac22079ae9a238a9633ddd64b7d8ff9b3a023051c9d6cfbbed48e90f14f2e17a2f6893ae9b3b6f46dd31ee

Download Submit
memory/448-135-0x0000000000000000-mapping.dmp

Download
memory/612-133-0x0000000000000000-mapping.dmp

Download
memory/1280-137-0x0000000000000000-mapping.dmp

Download
memory/1280-140-0x00000000065F0000-0x0000000006B94000-memory.dmp

Filesize
5.6MB

Download
memory/1280-141-0x00000000060B0000-0x0000000006116000-memory.dmp

Filesize
408KB

Download
memory/4032-136-0x0000000000000000-mapping.dmp

Download
memory/4580-132-0x0000000000000000-mapping.dmp

Download
memory/4624-130-0x0000000000CD0000-0x0000000000CE2000-memory.dmp

Filesize
72KB

Download
memory/4624-131-0x0000000005770000-0x000000000580C000-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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