asyncrat | 617b85633e1c3d7bdb93bfb405a2af4fd350f2e9f6c0a22eda52057200893e08

General

Target

617b85633e1c3d7bdb93bfb405a2af4fd350f2e9f6c0a22eda52057200893e08.exe
Size

880KB
MD5

295c1f301702c01c586e3d3dc15b59b8
SHA1

5d2bf77ea243a1862df423e9ab3cff4af31d55cd
SHA256

617b85633e1c3d7bdb93bfb405a2af4fd350f2e9f6c0a22eda52057200893e08
SHA512

5efb318cd7f3819eda842c1d9fc8680fbb13859a28686971502c30b4cf59bb3f16a48cabd903f04a1db9b16f908cc62b13e288f3e75173d95c4564f49fb5cf67
SSDEEP

12288:9CdOy3vVrKxR5CXbNjAOxK/j2n+4YG/6c1mFFja3mXgcjfRlgsUBgaurODb1PQ:9Cdxte/80jYLT3U1jfsWaurODRPQ

Score

10^/10

asyncrat default discovery persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

orcus.ddns.net:1337

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
false
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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\6qfH0 = "C:\\Users\\Admin\\6qfH0.exe"	617b85633e1c3d7bdb93bfb405a2af4fd350f2e9f6c0a22eda52057200893e08.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2304 set thread context of 4332	2304	617b85633e1c3d7bdb93bfb405a2af4fd350f2e9f6c0a22eda52057200893e08.exe	83

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	617b85633e1c3d7bdb93bfb405a2af4fd350f2e9f6c0a22eda52057200893e08.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegSvcs.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	dw20.exe

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	dw20.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	dw20.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeRestorePrivilege	2608	dw20.exe
Token: SeBackupPrivilege	2608	dw20.exe
Token: SeBackupPrivilege	2608	dw20.exe
Token: SeBackupPrivilege	2608	dw20.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2304 wrote to memory of 4332	2304	617b85633e1c3d7bdb93bfb405a2af4fd350f2e9f6c0a22eda52057200893e08.exe	83
PID 2304 wrote to memory of 4332	2304	617b85633e1c3d7bdb93bfb405a2af4fd350f2e9f6c0a22eda52057200893e08.exe	83
PID 2304 wrote to memory of 4332	2304	617b85633e1c3d7bdb93bfb405a2af4fd350f2e9f6c0a22eda52057200893e08.exe	83
PID 2304 wrote to memory of 4332	2304	617b85633e1c3d7bdb93bfb405a2af4fd350f2e9f6c0a22eda52057200893e08.exe	83
PID 2304 wrote to memory of 4332	2304	617b85633e1c3d7bdb93bfb405a2af4fd350f2e9f6c0a22eda52057200893e08.exe	83
PID 2304 wrote to memory of 4332	2304	617b85633e1c3d7bdb93bfb405a2af4fd350f2e9f6c0a22eda52057200893e08.exe	83
PID 2304 wrote to memory of 4332	2304	617b85633e1c3d7bdb93bfb405a2af4fd350f2e9f6c0a22eda52057200893e08.exe	83
PID 2304 wrote to memory of 4332	2304	617b85633e1c3d7bdb93bfb405a2af4fd350f2e9f6c0a22eda52057200893e08.exe	83
PID 4332 wrote to memory of 2608	4332	RegSvcs.exe	84
PID 4332 wrote to memory of 2608	4332	RegSvcs.exe	84
PID 4332 wrote to memory of 2608	4332	RegSvcs.exe	84

C:\Users\Admin\AppData\Local\Temp\617b85633e1c3d7bdb93bfb405a2af4fd350f2e9f6c0a22eda52057200893e08.exe
"C:\Users\Admin\AppData\Local\Temp\617b85633e1c3d7bdb93bfb405a2af4fd350f2e9f6c0a22eda52057200893e08.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2304
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4332
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
    dw20.exe -x -s 764
    3⤵
    - System Location Discovery: System Language Discovery
    - Checks processor information in registry
    - Enumerates system info in registry
    - Suspicious use of AdjustPrivilegeToken
    PID:2608

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/4332-8-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/4332-9-0x0000000074F62000-0x0000000074F63000-memory.dmp

Filesize
4KB

Download
memory/4332-10-0x0000000074F60000-0x0000000075511000-memory.dmp

Filesize
5.7MB

Download
memory/4332-11-0x0000000074F60000-0x0000000075511000-memory.dmp

Filesize
5.7MB

Download
memory/4332-18-0x0000000074F60000-0x0000000075511000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads