asyncrat | ef73a5f8ceb7220d18ea3d2b22fbf948e7bc290f25c79bb68f29e2be30bd3068

Analysis

max time kernel
120s
max time network
162s
platform
windows7_x64
resource
win7v20210408
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
behavioral1/memory/380-67-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/380-68-0x000000000040D08E-mapping.dmp	asyncrat
behavioral1/memory/380-69-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

Executes dropped EXE 6 IoCs

pid	Process
1140	configure.exe
1512	configure.exe
900	configure.exe
1260	configure.exe
268	configure.exe
956	configure.exe

Loads dropped DLL 1 IoCs

pid	Process
2036	cmd.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 816 set thread context of 380	816	Resume.exe	31

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
1752	schtasks.exe
1352	schtasks.exe
1824	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1820	timeout.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
380	Resume.exe
1140	configure.exe
1140	configure.exe
1140	configure.exe
1140	configure.exe
1140	configure.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	380	Resume.exe
Token: SeDebugPrivilege	1140	configure.exe

Suspicious use of WriteProcessMemory 57 IoCs

description	pid	Process	procid_target
PID 816 wrote to memory of 1752	816	Resume.exe	29
PID 816 wrote to memory of 1752	816	Resume.exe	29
PID 816 wrote to memory of 1752	816	Resume.exe	29
PID 816 wrote to memory of 1752	816	Resume.exe	29
PID 816 wrote to memory of 380	816	Resume.exe	31
PID 816 wrote to memory of 380	816	Resume.exe	31
PID 816 wrote to memory of 380	816	Resume.exe	31
PID 816 wrote to memory of 380	816	Resume.exe	31
PID 816 wrote to memory of 380	816	Resume.exe	31
PID 816 wrote to memory of 380	816	Resume.exe	31
PID 816 wrote to memory of 380	816	Resume.exe	31
PID 816 wrote to memory of 380	816	Resume.exe	31
PID 816 wrote to memory of 380	816	Resume.exe	31
PID 380 wrote to memory of 1652	380	Resume.exe	32
PID 380 wrote to memory of 1652	380	Resume.exe	32
PID 380 wrote to memory of 1652	380	Resume.exe	32
PID 380 wrote to memory of 1652	380	Resume.exe	32
PID 380 wrote to memory of 2036	380	Resume.exe	34
PID 380 wrote to memory of 2036	380	Resume.exe	34
PID 380 wrote to memory of 2036	380	Resume.exe	34
PID 380 wrote to memory of 2036	380	Resume.exe	34
PID 1652 wrote to memory of 1352	1652	cmd.exe	36
PID 1652 wrote to memory of 1352	1652	cmd.exe	36
PID 1652 wrote to memory of 1352	1652	cmd.exe	36
PID 1652 wrote to memory of 1352	1652	cmd.exe	36
PID 2036 wrote to memory of 1820	2036	cmd.exe	37
PID 2036 wrote to memory of 1820	2036	cmd.exe	37
PID 2036 wrote to memory of 1820	2036	cmd.exe	37
PID 2036 wrote to memory of 1820	2036	cmd.exe	37
PID 2036 wrote to memory of 1140	2036	cmd.exe	38
PID 2036 wrote to memory of 1140	2036	cmd.exe	38
PID 2036 wrote to memory of 1140	2036	cmd.exe	38
PID 2036 wrote to memory of 1140	2036	cmd.exe	38
PID 1140 wrote to memory of 1824	1140	configure.exe	39
PID 1140 wrote to memory of 1824	1140	configure.exe	39
PID 1140 wrote to memory of 1824	1140	configure.exe	39
PID 1140 wrote to memory of 1824	1140	configure.exe	39
PID 1140 wrote to memory of 1512	1140	configure.exe	41
PID 1140 wrote to memory of 1512	1140	configure.exe	41
PID 1140 wrote to memory of 1512	1140	configure.exe	41
PID 1140 wrote to memory of 1512	1140	configure.exe	41
PID 1140 wrote to memory of 900	1140	configure.exe	42
PID 1140 wrote to memory of 900	1140	configure.exe	42
PID 1140 wrote to memory of 900	1140	configure.exe	42
PID 1140 wrote to memory of 900	1140	configure.exe	42
PID 1140 wrote to memory of 1260	1140	configure.exe	43
PID 1140 wrote to memory of 1260	1140	configure.exe	43
PID 1140 wrote to memory of 1260	1140	configure.exe	43
PID 1140 wrote to memory of 1260	1140	configure.exe	43
PID 1140 wrote to memory of 268	1140	configure.exe	44
PID 1140 wrote to memory of 268	1140	configure.exe	44
PID 1140 wrote to memory of 268	1140	configure.exe	44
PID 1140 wrote to memory of 268	1140	configure.exe	44
PID 1140 wrote to memory of 956	1140	configure.exe	45
PID 1140 wrote to memory of 956	1140	configure.exe	45
PID 1140 wrote to memory of 956	1140	configure.exe	45
PID 1140 wrote to memory of 956	1140	configure.exe	45

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:816
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\oveEiGWT" /XML "C:\Users\Admin\AppData\Local\Temp\tmpC82F.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1752
- C:\Users\Admin\AppData\Local\Temp\Resume.exe
  "{path}"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:380
- - 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:1652
  - - 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:1352
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpEA9D.tmp.bat""
    3⤵
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:2036
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:1820
  - - C:\Users\Admin\AppData\Roaming\configure.exe
      "C:\Users\Admin\AppData\Roaming\configure.exe"
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:1140
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\oveEiGWT" /XML "C:\Users\Admin\AppData\Local\Temp\tmp7475.tmp"
        5⤵
        Creates scheduled task(s)
        
        PID:1824
    - - C:\Users\Admin\AppData\Roaming\configure.exe
        
        "{path}"
        5⤵
        Executes dropped EXE
        
        PID:1512
    - - C:\Users\Admin\AppData\Roaming\configure.exe
        
        "{path}"
        5⤵
        Executes dropped EXE
        
        PID:900
    - - C:\Users\Admin\AppData\Roaming\configure.exe
        
        "{path}"
        5⤵
        Executes dropped EXE
        
        PID:1260
    - - C:\Users\Admin\AppData\Roaming\configure.exe
        
        "{path}"
        5⤵
        Executes dropped EXE
        
        PID:268
    - - C:\Users\Admin\AppData\Roaming\configure.exe
        
        "{path}"
        5⤵
        Executes dropped EXE
        
        PID:956

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/380-71-0x00000000005B0000-0x00000000005B1000-memory.dmp

Download

memory/380-69-0x0000000000400000-0x0000000000412000-memory.dmp

Download

memory/380-67-0x0000000000400000-0x0000000000412000-memory.dmp

Download

memory/816-59-0x0000000000A60000-0x0000000000A61000-memory.dmp

Download

memory/816-64-0x00000000003F0000-0x0000000000406000-memory.dmp

Download

memory/816-63-0x00000000022A0000-0x0000000002307000-memory.dmp

Download

memory/816-62-0x00000000002B0000-0x00000000002B2000-memory.dmp

Download

memory/816-61-0x0000000004AC0000-0x0000000004AC1000-memory.dmp

Download

memory/1140-84-0x0000000004C50000-0x0000000004C51000-memory.dmp

Download

memory/1140-81-0x0000000000390000-0x0000000000391000-memory.dmp

Download