asyncrat | 44342d82310b3113282ae36a8b89eef47feb4cefb5131b95164df4e18ee9ebc3

Analysis

max time kernel
146s
max time network
151s
platform
windows10_x64
resource
win10v20210410
submitted
05/07/2021, 22:05

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General

Target
Aditi Tiwari.pdf.exe
Size 1.3MB
Sample210705-w5kmbfg2dj
SHA256 44342d82310b3113282ae36a8b89eef47feb4cefb5131b95164df4e18ee9ebc3
MD5 79d8e20fca7d32251a07a2d2c9fb51fb
SHA1 0527a27588059c9697ff06f5b1f19653ce342e1a
SHA512 b19e3e34b81b51779d177c4d1c2628f71e812c6d029b97b81c095ae13e3f73c88ff0676d880ced32c591236785b7bff9b39831cefb6ab5214800f72414d0a13c
MD5 SHA1 SHA512

Score

10^/10

asyncrat rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

adikremix.ydns.eu:3030

Mutex

AsyncMutex_6SI8OkPnk

Attributes

aes_key
EVf3iXPqVeGNfM0v7OFtNSBkmxCEVuQk
anti_detection
false
autorun
true
bdos
false
delay
Default
host
adikremix.ydns.eu
hwid
5
install_file
install_folder
%AppData%
mutex
AsyncMutex_6SI8OkPnk
pastebin_config
null
port
3030
version
0.5.7B

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat

Async RAT payload 4 IoCs

rat

resource	yara_rule
behavioral2/memory/3888-125-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral2/memory/3888-126-0x000000000040D08E-mapping.dmp	asyncrat
behavioral2/memory/1240-147-0x0000000004CF0000-0x00000000051EE000-memory.dmp	asyncrat
behavioral2/memory/2728-152-0x000000000040D08E-mapping.dmp	asyncrat

Executes dropped EXE 2 IoCs

pid	Process
1240	configure.exe
2728	configure.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4092 set thread context of 3888	4092	Aditi Tiwari.pdf.exe	78
PID 1240 set thread context of 2728	1240	configure.exe	86

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
3968	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3972	timeout.exe

Suspicious behavior: EnumeratesProcesses 13 IoCs

pid	Process
3888	Aditi Tiwari.pdf.exe
3888	Aditi Tiwari.pdf.exe
3888	Aditi Tiwari.pdf.exe
3888	Aditi Tiwari.pdf.exe
3888	Aditi Tiwari.pdf.exe
3888	Aditi Tiwari.pdf.exe
3888	Aditi Tiwari.pdf.exe
3888	Aditi Tiwari.pdf.exe
3888	Aditi Tiwari.pdf.exe
3888	Aditi Tiwari.pdf.exe
3888	Aditi Tiwari.pdf.exe
3888	Aditi Tiwari.pdf.exe
3888	Aditi Tiwari.pdf.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3888	Aditi Tiwari.pdf.exe
Token: SeDebugPrivilege	2728	configure.exe

Suspicious use of WriteProcessMemory 31 IoCs

description	pid	Process	procid_target
PID 4092 wrote to memory of 3888	4092	Aditi Tiwari.pdf.exe	78
PID 4092 wrote to memory of 3888	4092	Aditi Tiwari.pdf.exe	78
PID 4092 wrote to memory of 3888	4092	Aditi Tiwari.pdf.exe	78
PID 4092 wrote to memory of 3888	4092	Aditi Tiwari.pdf.exe	78
PID 4092 wrote to memory of 3888	4092	Aditi Tiwari.pdf.exe	78
PID 4092 wrote to memory of 3888	4092	Aditi Tiwari.pdf.exe	78
PID 4092 wrote to memory of 3888	4092	Aditi Tiwari.pdf.exe	78
PID 4092 wrote to memory of 3888	4092	Aditi Tiwari.pdf.exe	78
PID 3888 wrote to memory of 4008	3888	Aditi Tiwari.pdf.exe	79
PID 3888 wrote to memory of 4008	3888	Aditi Tiwari.pdf.exe	79
PID 3888 wrote to memory of 4008	3888	Aditi Tiwari.pdf.exe	79
PID 3888 wrote to memory of 1676	3888	Aditi Tiwari.pdf.exe	80
PID 3888 wrote to memory of 1676	3888	Aditi Tiwari.pdf.exe	80
PID 3888 wrote to memory of 1676	3888	Aditi Tiwari.pdf.exe	80
PID 1676 wrote to memory of 3972	1676	cmd.exe	83
PID 1676 wrote to memory of 3972	1676	cmd.exe	83
PID 1676 wrote to memory of 3972	1676	cmd.exe	83
PID 4008 wrote to memory of 3968	4008	cmd.exe	84
PID 4008 wrote to memory of 3968	4008	cmd.exe	84
PID 4008 wrote to memory of 3968	4008	cmd.exe	84
PID 1676 wrote to memory of 1240	1676	cmd.exe	85
PID 1676 wrote to memory of 1240	1676	cmd.exe	85
PID 1676 wrote to memory of 1240	1676	cmd.exe	85
PID 1240 wrote to memory of 2728	1240	configure.exe	86
PID 1240 wrote to memory of 2728	1240	configure.exe	86
PID 1240 wrote to memory of 2728	1240	configure.exe	86
PID 1240 wrote to memory of 2728	1240	configure.exe	86
PID 1240 wrote to memory of 2728	1240	configure.exe	86
PID 1240 wrote to memory of 2728	1240	configure.exe	86
PID 1240 wrote to memory of 2728	1240	configure.exe	86
PID 1240 wrote to memory of 2728	1240	configure.exe	86

C:\Users\Admin\AppData\Local\Temp\Aditi Tiwari.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Aditi Tiwari.pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4092
- C:\Users\Admin\AppData\Local\Temp\Aditi Tiwari.pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Aditi Tiwari.pdf.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3888
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "configure" /tr '"C:\Users\Admin\AppData\Roaming\configure.exe"' & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4008
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /f /sc onlogon /rl highest /tn "configure" /tr '"C:\Users\Admin\AppData\Roaming\configure.exe"'
      4⤵
      Creates scheduled task(s)
      PID:3968
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp2C8F.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1676
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:3972
  - - C:\Users\Admin\AppData\Roaming\configure.exe
      "C:\Users\Admin\AppData\Roaming\configure.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious use of WriteProcessMemory
      PID:1240
    - - C:\Users\Admin\AppData\Roaming\configure.exe
        
        "C:\Users\Admin\AppData\Roaming\configure.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        
        PID:2728

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1240-147-0x0000000004CF0000-0x00000000051EE000-memory.dmp

Download

memory/2728-157-0x0000000001190000-0x0000000001191000-memory.dmp

Download

memory/3888-125-0x0000000000400000-0x0000000000412000-memory.dmp

Download

memory/3888-130-0x00000000052A0000-0x00000000052A1000-memory.dmp

Download

memory/4092-124-0x0000000001110000-0x000000000112F000-memory.dmp

Download

memory/4092-114-0x0000000000690000-0x0000000000691000-memory.dmp

Download

memory/4092-123-0x0000000001070000-0x00000000010CB000-memory.dmp

Download

memory/4092-122-0x0000000005330000-0x000000000533F000-memory.dmp

Download

memory/4092-121-0x00000000050C0000-0x00000000055BE000-memory.dmp

Download

memory/4092-120-0x0000000005360000-0x0000000005361000-memory.dmp

Download

memory/4092-119-0x0000000005080000-0x0000000005081000-memory.dmp

Download

memory/4092-118-0x0000000005160000-0x0000000005161000-memory.dmp

Download

memory/4092-117-0x00000000055C0000-0x00000000055C1000-memory.dmp

Download

memory/4092-116-0x0000000004FD0000-0x0000000004FD1000-memory.dmp

Download