asyncrat | 9f234869febc12d41ea9e4520617b01ee96ee00044a285e23c5144568bdf82a5

Analysis

max time kernel
144s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20241007-es
resource tags

arch:x64arch:x86image:win10v2004-20241007-eslocale:es-esos:windows10-2004-x64systemwindows
submitted
06-12-2024 19:39

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General

Target

Documento_Legal.N°39273822-1289.exe
Size

1.2MB
MD5

70c65845de82550d68a1d51e014d14e7
SHA1

c8dcffc148c080554e084b065ebe96a3e761b228
SHA256

8832b1c7296d3b9779f18c420660f81ca9c4ea3a24f2cd7f11e3522c385fc302
SHA512

b5331b0b76b4a9d5462994cc2f62dd1b0a4e8f7f52998cef40bdbfd1292f44ffc7148ad5a4cf8b9f91a812373721223cf10c74c5c7242b066daccd6ada96f364
SSDEEP

24576:0aHuv6yMFEny7QAJcAGd29MLHAvgapAGiO9fzy9bZr2kb06SEJsLs52BK2XyXDfh:0bvW37QaSd29MLHAvggt9fzy9bZr2kbf

Score

10^/10

asyncrat dicembrinos05 discovery persistence rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Dicembrinos05

Mystudio201.casacam.net:8854

Mutex

DcRatMutex_qwqdanchun

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

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\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ReduceMemory = "C:\\Users\\Admin\\Documents\\ReduceMemory\\Bin\\ReduceMemory.exe"	Documento_Legal.N°39273822-1289.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4048 set thread context of 3104	4048	Documento_Legal.N°39273822-1289.exe	82

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	Documento_Legal.N°39273822-1289.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csc.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4048 wrote to memory of 3104	4048	Documento_Legal.N°39273822-1289.exe	82
PID 4048 wrote to memory of 3104	4048	Documento_Legal.N°39273822-1289.exe	82
PID 4048 wrote to memory of 3104	4048	Documento_Legal.N°39273822-1289.exe	82
PID 4048 wrote to memory of 3104	4048	Documento_Legal.N°39273822-1289.exe	82
PID 4048 wrote to memory of 3104	4048	Documento_Legal.N°39273822-1289.exe	82

C:\Users\Admin\AppData\Local\Temp\Documento_Legal.N°39273822-1289.exe
"C:\Users\Admin\AppData\Local\Temp\Documento_Legal.N°39273822-1289.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4048
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3104

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/3104-10-0x0000000073AAE000-0x0000000073AAF000-memory.dmp

Filesize
4KB

Download
memory/3104-15-0x0000000073AA0000-0x0000000074250000-memory.dmp

Filesize
7.7MB

Download
memory/3104-14-0x0000000073AAE000-0x0000000073AAF000-memory.dmp

Filesize
4KB

Download
memory/3104-13-0x00000000058F0000-0x00000000059F2000-memory.dmp

Filesize
1.0MB

Download
memory/3104-11-0x0000000073AA0000-0x0000000074250000-memory.dmp

Filesize
7.7MB

Download
memory/3104-7-0x0000000000830000-0x0000000000842000-memory.dmp

Filesize
72KB

Download
memory/4048-6-0x0000000000400000-0x0000000000551000-memory.dmp

Filesize
1.3MB

Download
memory/4048-9-0x0000000000400000-0x0000000000551000-memory.dmp

Filesize
1.3MB

Download
memory/4048-0-0x0000000000400000-0x0000000000551000-memory.dmp

Filesize
1.3MB

Download
memory/4048-8-0x0000000000400000-0x0000000000551000-memory.dmp

Filesize
1.3MB

Download
memory/4048-5-0x0000000000400000-0x0000000000551000-memory.dmp

Filesize
1.3MB

Download
memory/4048-12-0x000000000042D000-0x0000000000446000-memory.dmp

Filesize
100KB

Download
memory/4048-1-0x000000000042D000-0x0000000000446000-memory.dmp

Filesize
100KB

Download
memory/4048-4-0x0000000000400000-0x0000000000551000-memory.dmp

Filesize
1.3MB

Download
memory/4048-3-0x0000000000400000-0x0000000000551000-memory.dmp

Filesize
1.3MB

Download

Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads