asyncrat | ef73a5f8ceb7220d18ea3d2b22fbf948e7bc290f25c79bb68f29e2be30bd3068

Analysis

max time kernel
85s
max time network
164s
platform
windows10_x64
resource
win10v20210410
submitted
07/06/2021, 05:42

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General

Target
Resume.exe
Size 494KB
Sample210607-9yvyv5hyle
SHA256 ef73a5f8ceb7220d18ea3d2b22fbf948e7bc290f25c79bb68f29e2be30bd3068
MD5 c00f300d0d74837ec065864d1a1ea62f
SHA1 5c3dca8e455361d90083af0b9e5e4613adf8902f
SHA512 11d63aca7c72751f350903d867b2997a3331658ae75d4c26ca56188c0807db0e3015553fb6ce52195edbb6600e0df44891c69a64430b2a7cb444c237946a9d4c
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 3 IoCs

rat

resource	yara_rule
behavioral2/memory/2160-126-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral2/memory/2160-127-0x000000000040D08E-mapping.dmp	asyncrat
behavioral2/memory/1184-154-0x000000000040D08E-mapping.dmp	asyncrat

Executes dropped EXE 2 IoCs

pid	Process
1040	configure.exe
1184	configure.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3996 set thread context of 2160	3996	Resume.exe	81
PID 1040 set thread context of 1184	1040	configure.exe	91

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 3 IoCs

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

persistence

Scheduled Task

T1053

pid	Process
3964	schtasks.exe
4092	schtasks.exe
3304	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1680	timeout.exe

Suspicious behavior: EnumeratesProcesses 13 IoCs

pid	Process
2160	Resume.exe
2160	Resume.exe
2160	Resume.exe
2160	Resume.exe
2160	Resume.exe
2160	Resume.exe
2160	Resume.exe
2160	Resume.exe
2160	Resume.exe
2160	Resume.exe
2160	Resume.exe
2160	Resume.exe
2160	Resume.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2160	Resume.exe
Token: SeDebugPrivilege	1184	configure.exe

Suspicious use of WriteProcessMemory 37 IoCs

description	pid	Process	procid_target
PID 3996 wrote to memory of 3304	3996	Resume.exe	79
PID 3996 wrote to memory of 3304	3996	Resume.exe	79
PID 3996 wrote to memory of 3304	3996	Resume.exe	79
PID 3996 wrote to memory of 2160	3996	Resume.exe	81
PID 3996 wrote to memory of 2160	3996	Resume.exe	81
PID 3996 wrote to memory of 2160	3996	Resume.exe	81
PID 3996 wrote to memory of 2160	3996	Resume.exe	81
PID 3996 wrote to memory of 2160	3996	Resume.exe	81
PID 3996 wrote to memory of 2160	3996	Resume.exe	81
PID 3996 wrote to memory of 2160	3996	Resume.exe	81
PID 3996 wrote to memory of 2160	3996	Resume.exe	81
PID 2160 wrote to memory of 2372	2160	Resume.exe	82
PID 2160 wrote to memory of 2372	2160	Resume.exe	82
PID 2160 wrote to memory of 2372	2160	Resume.exe	82
PID 2160 wrote to memory of 3948	2160	Resume.exe	84
PID 2160 wrote to memory of 3948	2160	Resume.exe	84
PID 2160 wrote to memory of 3948	2160	Resume.exe	84
PID 3948 wrote to memory of 1680	3948	cmd.exe	86
PID 3948 wrote to memory of 1680	3948	cmd.exe	86
PID 3948 wrote to memory of 1680	3948	cmd.exe	86
PID 2372 wrote to memory of 3964	2372	cmd.exe	87
PID 2372 wrote to memory of 3964	2372	cmd.exe	87
PID 2372 wrote to memory of 3964	2372	cmd.exe	87
PID 3948 wrote to memory of 1040	3948	cmd.exe	88
PID 3948 wrote to memory of 1040	3948	cmd.exe	88
PID 3948 wrote to memory of 1040	3948	cmd.exe	88
PID 1040 wrote to memory of 4092	1040	configure.exe	89
PID 1040 wrote to memory of 4092	1040	configure.exe	89
PID 1040 wrote to memory of 4092	1040	configure.exe	89
PID 1040 wrote to memory of 1184	1040	configure.exe	91
PID 1040 wrote to memory of 1184	1040	configure.exe	91
PID 1040 wrote to memory of 1184	1040	configure.exe	91
PID 1040 wrote to memory of 1184	1040	configure.exe	91
PID 1040 wrote to memory of 1184	1040	configure.exe	91
PID 1040 wrote to memory of 1184	1040	configure.exe	91
PID 1040 wrote to memory of 1184	1040	configure.exe	91
PID 1040 wrote to memory of 1184	1040	configure.exe	91

C:\Users\Admin\AppData\Local\Temp\Resume.exe
"C:\Users\Admin\AppData\Local\Temp\Resume.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3996
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\oveEiGWT" /XML "C:\Users\Admin\AppData\Local\Temp\tmpB089.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:3304
- C:\Users\Admin\AppData\Local\Temp\Resume.exe
  "{path}"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2160
- - 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:2372
  - - 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:3964
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpCE81.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3948
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:1680
  - - 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:1040
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\oveEiGWT" /XML "C:\Users\Admin\AppData\Local\Temp\tmp565E.tmp"
        5⤵
        Creates scheduled task(s)
        
        PID:4092
    - - C:\Users\Admin\AppData\Roaming\configure.exe
        
        "{path}"
        5⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        
        PID:1184

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/1040-148-0x0000000004B10000-0x000000000500E000-memory.dmp

Download

memory/1184-159-0x00000000056C0000-0x00000000056C1000-memory.dmp

Download

memory/1184-162-0x00000000062B0000-0x00000000062B1000-memory.dmp

Download

memory/2160-131-0x0000000004D20000-0x0000000004D21000-memory.dmp

Download

memory/2160-126-0x0000000000400000-0x0000000000412000-memory.dmp

Download

memory/3996-122-0x0000000007270000-0x00000000072D7000-memory.dmp

Download

memory/3996-123-0x0000000007320000-0x0000000007336000-memory.dmp

Download

memory/3996-114-0x0000000000C60000-0x0000000000C61000-memory.dmp

Download

memory/3996-120-0x0000000005640000-0x0000000005B3E000-memory.dmp

Download

memory/3996-121-0x0000000008AB0000-0x0000000008AB1000-memory.dmp

Download

memory/3996-119-0x00000000056A0000-0x00000000056A2000-memory.dmp

Download

memory/3996-118-0x00000000055B0000-0x00000000055B1000-memory.dmp

Download

memory/3996-117-0x0000000005510000-0x0000000005511000-memory.dmp

Download

memory/3996-116-0x0000000005B40000-0x0000000005B41000-memory.dmp

Download