asyncrat | 99d8ecf3d2a1a59544148a8b2650e0fe4f4c76df2974d5d7df78de3f823c668b

General

Target

Drawing&spec.scr
Size

941KB
MD5

3a43f4d6c1ce25bc8efe548fa2b16bc7
SHA1

e0b8080d2c241ee9c8d7d31adb6ecc0fc43d0a0e
SHA256

4b5cc1e99d28651fbb693422c5d392c5d47dfa61c8ec4995197706de5cb3442a
SHA512

3613b2af89545273fb21c09889e02e477d86ac2e3f313fec2a28fb68c9e94b39b3160b26d7637dce1e5053808ffe14cb0aad9dd0c404bbd6d4c8d7ea897e8072
SSDEEP

24576:uu6J33O0c+JY5UZ+XC0kGso6FauSnJzxWY:gu0c++OCvkGs9FauSaY

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

69.174.100.131:6606

Mutex

abkZfsCYRZhk

Attributes

delay
10
install
false
install_file
order.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Asyncrat family
asyncrat

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\unfatigued.vbs	unfatigued.exe

Executes dropped EXE 1 IoCs

pid	Process
2168	unfatigued.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/files/0x0007000000023c7c-8.dat	autoit_exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2168 set thread context of 1916	2168	unfatigued.exe	85

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Drawing&spec.scr
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	unfatigued.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegSvcs.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2168	unfatigued.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1916	RegSvcs.exe

Suspicious use of FindShellTrayWindow 4 IoCs

pid	Process
3076	Drawing&spec.scr
3076	Drawing&spec.scr
2168	unfatigued.exe
2168	unfatigued.exe

Suspicious use of SendNotifyMessage 4 IoCs

pid	Process
3076	Drawing&spec.scr
3076	Drawing&spec.scr
2168	unfatigued.exe
2168	unfatigued.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 3076 wrote to memory of 2168	3076	Drawing&spec.scr	84
PID 3076 wrote to memory of 2168	3076	Drawing&spec.scr	84
PID 3076 wrote to memory of 2168	3076	Drawing&spec.scr	84
PID 2168 wrote to memory of 1916	2168	unfatigued.exe	85
PID 2168 wrote to memory of 1916	2168	unfatigued.exe	85
PID 2168 wrote to memory of 1916	2168	unfatigued.exe	85
PID 2168 wrote to memory of 1916	2168	unfatigued.exe	85

C:\Users\Admin\AppData\Local\Temp\Drawing&spec.scr
"C:\Users\Admin\AppData\Local\Temp\Drawing&spec.scr" /S
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:3076
- C:\Users\Admin\AppData\Local\iodite\unfatigued.exe
  "C:\Users\Admin\AppData\Local\Temp\Drawing&spec.scr" /S
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2168
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
    "C:\Users\Admin\AppData\Local\Temp\Drawing&spec.scr" /S
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:1916

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\iodite\unfatigued.exe

Filesize
941KB

MD5
3a43f4d6c1ce25bc8efe548fa2b16bc7

SHA1
e0b8080d2c241ee9c8d7d31adb6ecc0fc43d0a0e

SHA256
4b5cc1e99d28651fbb693422c5d392c5d47dfa61c8ec4995197706de5cb3442a

SHA512
3613b2af89545273fb21c09889e02e477d86ac2e3f313fec2a28fb68c9e94b39b3160b26d7637dce1e5053808ffe14cb0aad9dd0c404bbd6d4c8d7ea897e8072

Download Submit
memory/1916-26-0x0000000005E90000-0x0000000005F2C000-memory.dmp

Filesize
624KB

Download
memory/1916-27-0x00000000064E0000-0x0000000006A84000-memory.dmp

Filesize
5.6MB

Download
memory/1916-20-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1916-21-0x00000000747AE000-0x00000000747AF000-memory.dmp

Filesize
4KB

Download
memory/1916-22-0x00000000747AE000-0x00000000747AF000-memory.dmp

Filesize
4KB

Download
memory/1916-23-0x00000000747A0000-0x0000000074F50000-memory.dmp

Filesize
7.7MB

Download
memory/1916-34-0x00000000747A0000-0x0000000074F50000-memory.dmp

Filesize
7.7MB

Download
memory/1916-33-0x00000000071C0000-0x00000000071CA000-memory.dmp

Filesize
40KB

Download
memory/1916-28-0x0000000005FA0000-0x0000000006006000-memory.dmp

Filesize
408KB

Download
memory/1916-30-0x0000000007110000-0x00000000071AC000-memory.dmp

Filesize
624KB

Download
memory/1916-29-0x0000000006E90000-0x0000000006F06000-memory.dmp

Filesize
472KB

Download
memory/1916-31-0x0000000006E70000-0x0000000006E8E000-memory.dmp

Filesize
120KB

Download
memory/1916-32-0x0000000007220000-0x0000000007260000-memory.dmp

Filesize
256KB

Download
memory/2168-18-0x0000000001050000-0x0000000001450000-memory.dmp

Filesize
4.0MB

Download
memory/3076-6-0x0000000000940000-0x0000000000D40000-memory.dmp

Filesize
4.0MB

Download

Analysis

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