asyncrat | fd3bf745ea149f34597a9ac8ca5974b87be3ff4fe7ed337ea7151b298e0cc42d

Analysis

max time kernel
91s
max time network
121s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
01/04/2024, 03:19

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General

Target
Purchase_Order.exe
Size 598KB
Sample240401-dvkhjacf23
SHA256 11b68b5d2bc9b738db1dea44b2cf8b4a03a7c49e85ea81f1a15bdb7c1ce46a1b
MD5 6773242966c38d2e2bee45f4097e1503
SHA1 87c4150c151c0d8c73f58ca7d4def7241eec94be
SHA512 26beef97685a07c3f7fbc165af0cc137669654a1d5439a44f16603b04c2382771636f8004ce19ebdd402e133580ba48a252d04d4b7442b72340dbb4cf1358dd3
SSDEEP 6144:6Je+8ThPaF+c09JpXMJcCapP9vNfI4ujU1hwJFLeb:tThPHc09Jp8yCi9v8jiwJFLeb
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

185.222.58.151:59790

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
20
install
false
install_folder
%AppData%

aes.plain

Signatures

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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4784 set thread context of 2428	4784	Purchase_Order.exe	91

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\AppCompat\Programs\Amcache.hve.tmp	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 behavior: EnumeratesProcesses 3 IoCs

pid	Process
4784	Purchase_Order.exe
4784	Purchase_Order.exe
4784	Purchase_Order.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	4784	Purchase_Order.exe
Token: SeRestorePrivilege	1192	dw20.exe
Token: SeBackupPrivilege	1192	dw20.exe
Token: SeBackupPrivilege	1192	dw20.exe
Token: SeBackupPrivilege	1192	dw20.exe
Token: SeBackupPrivilege	1192	dw20.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4784 wrote to memory of 3940	4784	Purchase_Order.exe	90
PID 4784 wrote to memory of 3940	4784	Purchase_Order.exe	90
PID 4784 wrote to memory of 3940	4784	Purchase_Order.exe	90
PID 4784 wrote to memory of 2428	4784	Purchase_Order.exe	91
PID 4784 wrote to memory of 2428	4784	Purchase_Order.exe	91
PID 4784 wrote to memory of 2428	4784	Purchase_Order.exe	91
PID 4784 wrote to memory of 2428	4784	Purchase_Order.exe	91
PID 4784 wrote to memory of 2428	4784	Purchase_Order.exe	91
PID 4784 wrote to memory of 2428	4784	Purchase_Order.exe	91
PID 4784 wrote to memory of 2428	4784	Purchase_Order.exe	91
PID 4784 wrote to memory of 2428	4784	Purchase_Order.exe	91
PID 2428 wrote to memory of 1192	2428	RegSvcs.exe	92
PID 2428 wrote to memory of 1192	2428	RegSvcs.exe	92
PID 2428 wrote to memory of 1192	2428	RegSvcs.exe	92

C:\Users\Admin\AppData\Local\Temp\Purchase_Order.exe
"C:\Users\Admin\AppData\Local\Temp\Purchase_Order.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4784
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
  "{path}"
  2⤵
  PID:3940
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
  "{path}"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2428
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
    dw20.exe -x -s 764
    3⤵
    - Drops file in Windows directory
    - Checks processor information in registry
    - Enumerates system info in registry
    - Suspicious use of AdjustPrivilegeToken
    PID:1192

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2428-5-0x0000000000400000-0x0000000000412000-memory.dmp

Download

memory/2428-7-0x0000000074BF0000-0x00000000751A1000-memory.dmp

Download

memory/2428-9-0x00000000019F0000-0x0000000001A00000-memory.dmp

Download

memory/2428-10-0x0000000074BF0000-0x00000000751A1000-memory.dmp

Download

memory/2428-17-0x0000000074BF0000-0x00000000751A1000-memory.dmp

Download

memory/4784-0-0x0000000074BF0000-0x00000000751A1000-memory.dmp

Download

memory/4784-1-0x0000000000850000-0x0000000000860000-memory.dmp

Download

memory/4784-2-0x0000000074BF0000-0x00000000751A1000-memory.dmp

Download

memory/4784-3-0x0000000074BF0000-0x00000000751A1000-memory.dmp

Download

memory/4784-4-0x0000000000850000-0x0000000000860000-memory.dmp

Download

memory/4784-8-0x0000000074BF0000-0x00000000751A1000-memory.dmp

Download