asyncrat | 1aa4b89bb7f459747e5101ceb8db5f40d1417bed8250695b94c91f08863ebc12

General

Target

af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630.exe
Size

45KB
MD5

e16de135773985fd9ef2e0afb94f774a
SHA1

84c2dd69ec6247cea480925d9ecfc728f5d04c58
SHA256

af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630
SHA512

0573dbceabcef8f74d6a32d45645ad297b6f28e7f26043ce0c1a68bd24cb8a67b75158050e2ee4b1dcdd37b660da26ecc135dd3deb630dee9c10a3863e817c34
SSDEEP

768:DuwQNToEjaNLWU3zKZmo2q723YZJugbbb409ybdPIK/JjbOgX3iWS9UmozmBDZfx:DuwQNToqaS2DYosymK/pbxXSzdfx

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

sr5gsedfgwsers.freemyip.com:15420

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
tmpC723.tmp.exe
install_folder
%Temp%

aes.plain

Signatures

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

Async RAT payload 3 IoCs

rat

resource	yara_rule
behavioral2/memory/4160-132-0x0000000000E10000-0x0000000000E22000-memory.dmp	asyncrat
behavioral2/files/0x000a000000022dcd-141.dat	asyncrat
behavioral2/files/0x000a000000022dcd-142.dat	asyncrat

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\Control Panel\International\Geo\Nation	af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630.exe

Executes dropped EXE 1 IoCs

pid	Process
2856	tmpC723.tmp.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

pid	Process
4276	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1712	timeout.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
4160	af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630.exe
4160	af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630.exe
4160	af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630.exe
4160	af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630.exe
4160	af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630.exe
4160	af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630.exe
4160	af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630.exe
4160	af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630.exe
4160	af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630.exe
4160	af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630.exe
4160	af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630.exe
4160	af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630.exe
4160	af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630.exe
4160	af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630.exe
4160	af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630.exe
4160	af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630.exe
4160	af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630.exe
4160	af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630.exe
4160	af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630.exe
4160	af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630.exe
4160	af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630.exe
4160	af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630.exe
4160	af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4160	af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630.exe
Token: SeDebugPrivilege	2856	tmpC723.tmp.exe
Token: SeDebugPrivilege	2856	tmpC723.tmp.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4160 wrote to memory of 3852	4160	af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630.exe	82
PID 4160 wrote to memory of 3852	4160	af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630.exe	82
PID 4160 wrote to memory of 3852	4160	af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630.exe	82
PID 4160 wrote to memory of 4732	4160	af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630.exe	84
PID 4160 wrote to memory of 4732	4160	af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630.exe	84
PID 4160 wrote to memory of 4732	4160	af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630.exe	84
PID 3852 wrote to memory of 4276	3852	cmd.exe	86
PID 3852 wrote to memory of 4276	3852	cmd.exe	86
PID 3852 wrote to memory of 4276	3852	cmd.exe	86
PID 4732 wrote to memory of 1712	4732	cmd.exe	87
PID 4732 wrote to memory of 1712	4732	cmd.exe	87
PID 4732 wrote to memory of 1712	4732	cmd.exe	87
PID 4732 wrote to memory of 2856	4732	cmd.exe	88
PID 4732 wrote to memory of 2856	4732	cmd.exe	88
PID 4732 wrote to memory of 2856	4732	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630.exe
"C:\Users\Admin\AppData\Local\Temp\af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4160
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "tmpC723.tmp" /tr '"C:\Users\Admin\AppData\Local\Temp\tmpC723.tmp.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3852
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "tmpC723.tmp" /tr '"C:\Users\Admin\AppData\Local\Temp\tmpC723.tmp.exe"'
    3⤵
    - Creates scheduled task(s)
    PID:4276
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp812B.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4732
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1712
- - C:\Users\Admin\AppData\Local\Temp\tmpC723.tmp.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpC723.tmp.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:2856

Network

MITRE ATT&CK Enterprise 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

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmp812B.tmp.bat

Filesize
158B

MD5
324816e6416b1a706a54c33280250b87

SHA1
bf2ea60d8547591046b1e459ed496ea1658bd7d5

SHA256
40f48aadb3f0c30860c261e3629aadbbb58ee24e9ae7e0e9087c17fddab7dfaf

SHA512
b6daacc3c4d28b4aa2c49ce7aff261d2607f8991e8f2be6119a21f1b8f14d49d18211741b44740dcd253a292e187526e060363cb39361e087d474cd40ff9125f

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpC723.tmp.exe

Filesize
45KB

MD5
e16de135773985fd9ef2e0afb94f774a

SHA1
84c2dd69ec6247cea480925d9ecfc728f5d04c58

SHA256
af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630

SHA512
0573dbceabcef8f74d6a32d45645ad297b6f28e7f26043ce0c1a68bd24cb8a67b75158050e2ee4b1dcdd37b660da26ecc135dd3deb630dee9c10a3863e817c34

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpC723.tmp.exe

Filesize
45KB

MD5
e16de135773985fd9ef2e0afb94f774a

SHA1
84c2dd69ec6247cea480925d9ecfc728f5d04c58

SHA256
af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630

SHA512
0573dbceabcef8f74d6a32d45645ad297b6f28e7f26043ce0c1a68bd24cb8a67b75158050e2ee4b1dcdd37b660da26ecc135dd3deb630dee9c10a3863e817c34

Download Submit
memory/1712-139-0x0000000000000000-mapping.dmp

Download
memory/2856-140-0x0000000000000000-mapping.dmp

Download
memory/2856-143-0x0000000005EE0000-0x0000000006484000-memory.dmp

Filesize
5.6MB

Download
memory/3852-135-0x0000000000000000-mapping.dmp

Download
memory/4160-132-0x0000000000E10000-0x0000000000E22000-memory.dmp

Filesize
72KB

Download
memory/4160-133-0x00000000058B0000-0x0000000005916000-memory.dmp

Filesize
408KB

Download
memory/4160-134-0x0000000005D00000-0x0000000005D9C000-memory.dmp

Filesize
624KB

Download
memory/4276-137-0x0000000000000000-mapping.dmp

Download
memory/4732-136-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads