asyncrat | 44342d82310b3113282ae36a8b89eef47feb4cefb5131b95164df4e18ee9ebc3

Analysis

max time kernel
149s
max time network
194s
platform
windows7_x64
resource
win7v20210410
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 5 IoCs

rat

resource	yara_rule
behavioral1/memory/572-65-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/572-66-0x000000000040D08E-mapping.dmp	asyncrat
behavioral1/memory/572-67-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1816-87-0x000000000040D08E-mapping.dmp	asyncrat
behavioral1/memory/1816-89-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

Executes dropped EXE 2 IoCs

pid	Process
1044	configure.exe
1816	configure.exe

Loads dropped DLL 1 IoCs

pid	Process
112	cmd.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1140 set thread context of 572	1140	Aditi Tiwari.pdf.exe	29
PID 1044 set thread context of 1816	1044	configure.exe	37

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
1804	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
540	timeout.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
572	Aditi Tiwari.pdf.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	572	Aditi Tiwari.pdf.exe
Token: SeDebugPrivilege	1816	configure.exe

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 1140 wrote to memory of 572	1140	Aditi Tiwari.pdf.exe	29
PID 1140 wrote to memory of 572	1140	Aditi Tiwari.pdf.exe	29
PID 1140 wrote to memory of 572	1140	Aditi Tiwari.pdf.exe	29
PID 1140 wrote to memory of 572	1140	Aditi Tiwari.pdf.exe	29
PID 1140 wrote to memory of 572	1140	Aditi Tiwari.pdf.exe	29
PID 1140 wrote to memory of 572	1140	Aditi Tiwari.pdf.exe	29
PID 1140 wrote to memory of 572	1140	Aditi Tiwari.pdf.exe	29
PID 1140 wrote to memory of 572	1140	Aditi Tiwari.pdf.exe	29
PID 1140 wrote to memory of 572	1140	Aditi Tiwari.pdf.exe	29
PID 572 wrote to memory of 588	572	Aditi Tiwari.pdf.exe	30
PID 572 wrote to memory of 588	572	Aditi Tiwari.pdf.exe	30
PID 572 wrote to memory of 588	572	Aditi Tiwari.pdf.exe	30
PID 572 wrote to memory of 588	572	Aditi Tiwari.pdf.exe	30
PID 572 wrote to memory of 112	572	Aditi Tiwari.pdf.exe	32
PID 572 wrote to memory of 112	572	Aditi Tiwari.pdf.exe	32
PID 572 wrote to memory of 112	572	Aditi Tiwari.pdf.exe	32
PID 572 wrote to memory of 112	572	Aditi Tiwari.pdf.exe	32
PID 588 wrote to memory of 1804	588	cmd.exe	34
PID 588 wrote to memory of 1804	588	cmd.exe	34
PID 588 wrote to memory of 1804	588	cmd.exe	34
PID 588 wrote to memory of 1804	588	cmd.exe	34
PID 112 wrote to memory of 540	112	cmd.exe	35
PID 112 wrote to memory of 540	112	cmd.exe	35
PID 112 wrote to memory of 540	112	cmd.exe	35
PID 112 wrote to memory of 540	112	cmd.exe	35
PID 112 wrote to memory of 1044	112	cmd.exe	36
PID 112 wrote to memory of 1044	112	cmd.exe	36
PID 112 wrote to memory of 1044	112	cmd.exe	36
PID 112 wrote to memory of 1044	112	cmd.exe	36
PID 1044 wrote to memory of 1816	1044	configure.exe	37
PID 1044 wrote to memory of 1816	1044	configure.exe	37
PID 1044 wrote to memory of 1816	1044	configure.exe	37
PID 1044 wrote to memory of 1816	1044	configure.exe	37
PID 1044 wrote to memory of 1816	1044	configure.exe	37
PID 1044 wrote to memory of 1816	1044	configure.exe	37
PID 1044 wrote to memory of 1816	1044	configure.exe	37
PID 1044 wrote to memory of 1816	1044	configure.exe	37
PID 1044 wrote to memory of 1816	1044	configure.exe	37

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:1140
- 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:572
- - 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:588
  - - 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:1804
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpBB53.tmp.bat""
    3⤵
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:112
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:540
  - - 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:1044
    - - C:\Users\Admin\AppData\Roaming\configure.exe
        
        "C:\Users\Admin\AppData\Roaming\configure.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        
        PID:1816

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/572-69-0x0000000075D41000-0x0000000075D43000-memory.dmp

Download

memory/572-70-0x0000000002220000-0x0000000002221000-memory.dmp

Download

memory/572-67-0x0000000000400000-0x0000000000412000-memory.dmp

Download

memory/572-65-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/1044-82-0x0000000004CA0000-0x0000000004CA1000-memory.dmp

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memory/1044-80-0x0000000000060000-0x0000000000061000-memory.dmp

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memory/1140-63-0x00000000052E0000-0x000000000533B000-memory.dmp

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memory/1140-64-0x0000000000A70000-0x0000000000A8F000-memory.dmp

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memory/1140-62-0x00000000004E0000-0x00000000004EF000-memory.dmp

Download

memory/1140-59-0x0000000000B30000-0x0000000000B31000-memory.dmp

Download

memory/1140-61-0x0000000004BF0000-0x0000000004BF1000-memory.dmp

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memory/1816-89-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/1816-91-0x00000000003B0000-0x00000000003B1000-memory.dmp

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