asyncrat | 1e75965d3ec1943db598d2a214ec7c58c1dc3bc88053c6a0545d087e5f009edc

Analysis

max time kernel
140s
max time network
136s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
25/03/2025, 11:21

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General

Target

PO 6300019918..exe
Size

750KB
MD5

66645e2b85084bf859e244ca2d6ff0cc
SHA1

37fae7b3c6c4d0acb4b1001f47f906fc24a97d98
SHA256

cc56266bc176fcf13629cec7f6290c6bd62fe2a47f202f28daf6152438b28a5b
SHA512

77a9b9ec7138c467e69f42378641f986ef868fabc3e37a25ff4f3ba0636cba9ae696606b4f287b8577ee30ff2c5c5d0447e9ca05592b28fad1a1541bc9c07f79
SSDEEP

12288:cAI0QiIQEJgDkWyMzShD6vPS0IyacFA/5bgO72lso2w6aX6gO1Mio:cAPs1JgoWBYDOU7hbga2rPXtT

Score

10^/10

asyncrat default discovery rat upx

Malware Config

Extracted

Family

asyncrat

Version

0.5.7A

Botnet

Default

whatgodcannotdodoestnotexist.duckdns.org:20905

Mutex

rqivnkwojys

Attributes

delay
1
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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2080 set thread context of 2696	2080	PO 6300019918..exe	30

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/2696-8-0x0000000000400000-0x0000000000432000-memory.dmp	upx
behavioral1/memory/2696-12-0x0000000000400000-0x0000000000432000-memory.dmp	upx
behavioral1/memory/2696-9-0x0000000000400000-0x0000000000432000-memory.dmp	upx
behavioral1/memory/2696-7-0x0000000000400000-0x0000000000432000-memory.dmp	upx
behavioral1/memory/2696-4-0x0000000000400000-0x0000000000432000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 2 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	PO 6300019918..exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PO 6300019918..exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2080	PO 6300019918..exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2080	PO 6300019918..exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2080 wrote to memory of 2696	2080	PO 6300019918..exe	30
PID 2080 wrote to memory of 2696	2080	PO 6300019918..exe	30
PID 2080 wrote to memory of 2696	2080	PO 6300019918..exe	30
PID 2080 wrote to memory of 2696	2080	PO 6300019918..exe	30

C:\Users\Admin\AppData\Local\Temp\PO 6300019918..exe
"C:\Users\Admin\AppData\Local\Temp\PO 6300019918..exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2080
- C:\Users\Admin\AppData\Local\Temp\PO 6300019918..exe
  "C:\Users\Admin\AppData\Local\Temp\PO 6300019918..exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2696

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2080-0-0x0000000000220000-0x0000000000221000-memory.dmp

Filesize
4KB

Download
memory/2080-2-0x00000000002B0000-0x00000000002C1000-memory.dmp

Filesize
68KB

Download
memory/2080-3-0x00000000002D0000-0x00000000002D1000-memory.dmp

Filesize
4KB

Download
memory/2080-5-0x0000000000400000-0x00000000004C1000-memory.dmp

Filesize
772KB

Download
memory/2696-8-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2696-12-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2696-11-0x00000000002D0000-0x00000000002E2000-memory.dmp

Filesize
72KB

Download
memory/2696-10-0x00000000002D0000-0x00000000002E2000-memory.dmp

Filesize
72KB

Download
memory/2696-9-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2696-7-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2696-4-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2696-24-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2696-23-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2696-25-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download