asyncrat | 9f234869febc12d41ea9e4520617b01ee96ee00044a285e23c5144568bdf82a5

General

Target

Documento_Legal.N°39273822-1289.rar
Size

583KB
MD5

e5301d99eb87f0ec6efeb33ca44011f7
SHA1

5e918641f0a8b5d582bb00e31078cebf1deda4db
SHA256

9f234869febc12d41ea9e4520617b01ee96ee00044a285e23c5144568bdf82a5
SHA512

7042365faa9b513e4f8283be7aaa3be198eab7b10f8ad143b886dd069d9bf9170ea60ad70e14287c3d62e90dac15ac96df2658a95beb24f0dc4c816b7968a3f8
SSDEEP

12288:Vkav7xcnBkCLQYGAA/ITF6PMdBC4qJc+QAMt6FU5n+8Lng7TA2ZBXIuFxA:Vp7xcnBkcpxTYPGIFm+Qtqs+8LnOHBrW

Score

10^/10

asyncrat dicembrinos05 discovery persistence rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Dicembrinos05

C2

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

Executes dropped EXE 1 IoCs

pid	Process
2792	Documento_Legal.N°39273822-1289.exe

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-1-5-21-3692679935-4019334568-335155002-1000\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 2792 set thread context of 2756	2792	Documento_Legal.N°39273822-1289.exe	32

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 behavior: EnumeratesProcesses 1 IoCs

pid	Process
2564	7zFM.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2564	7zFM.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeRestorePrivilege	2564	7zFM.exe
Token: 35	2564	7zFM.exe
Token: SeSecurityPrivilege	2564	7zFM.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
2564	7zFM.exe
2564	7zFM.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2564 wrote to memory of 2792	2564	7zFM.exe	31
PID 2564 wrote to memory of 2792	2564	7zFM.exe	31
PID 2564 wrote to memory of 2792	2564	7zFM.exe	31
PID 2564 wrote to memory of 2792	2564	7zFM.exe	31
PID 2792 wrote to memory of 2756	2792	Documento_Legal.N°39273822-1289.exe	32
PID 2792 wrote to memory of 2756	2792	Documento_Legal.N°39273822-1289.exe	32
PID 2792 wrote to memory of 2756	2792	Documento_Legal.N°39273822-1289.exe	32
PID 2792 wrote to memory of 2756	2792	Documento_Legal.N°39273822-1289.exe	32
PID 2792 wrote to memory of 2756	2792	Documento_Legal.N°39273822-1289.exe	32
PID 2792 wrote to memory of 2756	2792	Documento_Legal.N°39273822-1289.exe	32

C:\Program Files\7-Zip\7zFM.exe
"C:\Program Files\7-Zip\7zFM.exe" "C:\Users\Admin\AppData\Local\Temp\Documento_Legal.N°39273822-1289.rar"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:2564
- C:\Users\Admin\AppData\Local\Temp\7zO40AC6717\Documento_Legal.N°39273822-1289.exe
  "C:\Users\Admin\AppData\Local\Temp\7zO40AC6717\Documento_Legal.N°39273822-1289.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2792
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2756

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\7zO40AC6717\Documento_Legal.N°39273822-1289.exe

Filesize
1.2MB

MD5
70c65845de82550d68a1d51e014d14e7

SHA1
c8dcffc148c080554e084b065ebe96a3e761b228

SHA256
8832b1c7296d3b9779f18c420660f81ca9c4ea3a24f2cd7f11e3522c385fc302

SHA512
b5331b0b76b4a9d5462994cc2f62dd1b0a4e8f7f52998cef40bdbfd1292f44ffc7148ad5a4cf8b9f91a812373721223cf10c74c5c7242b066daccd6ada96f364

Download Submit
memory/2756-18-0x0000000000080000-0x0000000000092000-memory.dmp

Filesize
72KB

Download
memory/2756-17-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/2756-15-0x0000000000080000-0x0000000000092000-memory.dmp

Filesize
72KB

Download
memory/2756-23-0x0000000000080000-0x0000000000092000-memory.dmp

Filesize
72KB

Download
memory/2756-22-0x0000000000080000-0x0000000000092000-memory.dmp

Filesize
72KB

Download
memory/2792-11-0x0000000000400000-0x0000000000551000-memory.dmp

Filesize
1.3MB

Download
memory/2792-14-0x0000000000400000-0x0000000000551000-memory.dmp

Filesize
1.3MB

Download
memory/2792-13-0x0000000000400000-0x0000000000551000-memory.dmp

Filesize
1.3MB

Download
memory/2792-12-0x0000000000400000-0x0000000000551000-memory.dmp

Filesize
1.3MB

Download
memory/2792-20-0x0000000000400000-0x0000000000551000-memory.dmp

Filesize
1.3MB

Download
memory/2792-19-0x0000000000400000-0x0000000000551000-memory.dmp

Filesize
1.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads