asyncrat | 8f42d1e07595808544eed18a45e8d7220dff40597d4d53d0f63fab47554afbdf

General

Target

8f42d1e07595808544eed18a45e8d7220dff40597d4d53d0f63fab47554afbdf.exe
Size

945KB
MD5

bc18b6803a287e63b3668b5817f12419
SHA1

bc21190df092d93629068c705ea8dc630d3db4a4
SHA256

8f42d1e07595808544eed18a45e8d7220dff40597d4d53d0f63fab47554afbdf
SHA512

2c29abcd294fd09e39cb604192628c2e4aa71241575ac38644c0fd7e5ac6b77c1f12302003636f166747d7b44649c7a9d31915e1b2c6c5fa09201428187c59e2
SSDEEP

24576:nu6J33O0c+JY5UZ+XC0kGso6FaNXpPkMeCWY:hu0c++OCvkGs9FaNhkZY

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\Wausaukee.vbs	Wausaukee.exe

Executes dropped EXE 1 IoCs

pid	Process
1400	Wausaukee.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/files/0x0007000000023cb7-9.dat	autoit_exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1400 set thread context of 4880	1400	Wausaukee.exe	83

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2812	1400	WerFault.exe	82

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	8f42d1e07595808544eed18a45e8d7220dff40597d4d53d0f63fab47554afbdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Wausaukee.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegSvcs.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1400	Wausaukee.exe

Suspicious use of FindShellTrayWindow 4 IoCs

pid	Process
3876	8f42d1e07595808544eed18a45e8d7220dff40597d4d53d0f63fab47554afbdf.exe
3876	8f42d1e07595808544eed18a45e8d7220dff40597d4d53d0f63fab47554afbdf.exe
1400	Wausaukee.exe
1400	Wausaukee.exe

Suspicious use of SendNotifyMessage 4 IoCs

pid	Process
3876	8f42d1e07595808544eed18a45e8d7220dff40597d4d53d0f63fab47554afbdf.exe
3876	8f42d1e07595808544eed18a45e8d7220dff40597d4d53d0f63fab47554afbdf.exe
1400	Wausaukee.exe
1400	Wausaukee.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 3876 wrote to memory of 1400	3876	8f42d1e07595808544eed18a45e8d7220dff40597d4d53d0f63fab47554afbdf.exe	82
PID 3876 wrote to memory of 1400	3876	8f42d1e07595808544eed18a45e8d7220dff40597d4d53d0f63fab47554afbdf.exe	82
PID 3876 wrote to memory of 1400	3876	8f42d1e07595808544eed18a45e8d7220dff40597d4d53d0f63fab47554afbdf.exe	82
PID 1400 wrote to memory of 4880	1400	Wausaukee.exe	83
PID 1400 wrote to memory of 4880	1400	Wausaukee.exe	83
PID 1400 wrote to memory of 4880	1400	Wausaukee.exe	83
PID 1400 wrote to memory of 4880	1400	Wausaukee.exe	83

C:\Users\Admin\AppData\Local\Temp\8f42d1e07595808544eed18a45e8d7220dff40597d4d53d0f63fab47554afbdf.exe
"C:\Users\Admin\AppData\Local\Temp\8f42d1e07595808544eed18a45e8d7220dff40597d4d53d0f63fab47554afbdf.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:3876
- C:\Users\Admin\AppData\Local\preinhered\Wausaukee.exe
  "C:\Users\Admin\AppData\Local\Temp\8f42d1e07595808544eed18a45e8d7220dff40597d4d53d0f63fab47554afbdf.exe"
  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:1400
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
    "C:\Users\Admin\AppData\Local\Temp\8f42d1e07595808544eed18a45e8d7220dff40597d4d53d0f63fab47554afbdf.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4880
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1400 -s 668
    3⤵
    - Program crash
    PID:2812

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 1400 -ip 1400
1⤵
PID:3320

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\preinhered\Wausaukee.exe

Filesize
945KB

MD5
bc18b6803a287e63b3668b5817f12419

SHA1
bc21190df092d93629068c705ea8dc630d3db4a4

SHA256
8f42d1e07595808544eed18a45e8d7220dff40597d4d53d0f63fab47554afbdf

SHA512
2c29abcd294fd09e39cb604192628c2e4aa71241575ac38644c0fd7e5ac6b77c1f12302003636f166747d7b44649c7a9d31915e1b2c6c5fa09201428187c59e2

Download Submit
memory/1400-18-0x0000000001310000-0x0000000001710000-memory.dmp

Filesize
4.0MB

Download
memory/3876-6-0x0000000001000000-0x0000000001400000-memory.dmp

Filesize
4.0MB

Download
memory/4880-20-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/4880-21-0x00000000745EE000-0x00000000745EF000-memory.dmp

Filesize
4KB

Download
memory/4880-22-0x00000000745E0000-0x0000000074D90000-memory.dmp

Filesize
7.7MB

Download
memory/4880-23-0x00000000745E0000-0x0000000074D90000-memory.dmp

Filesize
7.7MB

Download

Analysis

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