asyncrat | b5522fb2683e7ff30d329d6d7afd7b5eca7b60d581757476bda4925f8f10ddb4

Analysis

max time kernel
150s
max time network
19s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
01/08/2024, 01:54

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General

Target

b5522fb2683e7ff30d329d6d7afd7b5eca7b60d581757476bda4925f8f10ddb4.exe
Size

585KB
MD5

25dbcf1fe03ad12511191f54bff57d76
SHA1

b748178f5756712162edec1e85fa6e0a456bc722
SHA256

b5522fb2683e7ff30d329d6d7afd7b5eca7b60d581757476bda4925f8f10ddb4
SHA512

ecdc722f18d81fbd0dbd164b6bdfec25fa2c3b3bbc3305f2a8c092b4e0607932c2ee0303a3bbadc6f38ff74b406444f1b401d7822727f66fe139796cad13d722
SSDEEP

6144:9YZmun4mCYZWNfg2IJHCRrtDWZALTgvLP1fB+toSUMqQGc8oYTvQ4d8Kmk/5p3:9sAlgrVwZaeTgvp4oSUMqK0Q4dtm

Score

10^/10

asyncrat amu discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

AMU

jnmanymen.ydns.eu:1470

Mutex

Y9Lj8dOJExpn

Attributes

delay
10
install
true
install_file
windows.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Drops startup file 3 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\file.lnk	b5522fb2683e7ff30d329d6d7afd7b5eca7b60d581757476bda4925f8f10ddb4.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\file.exe	cmd.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\file.exe	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
3008	file.exe

Loads dropped DLL 2 IoCs

pid	Process
2056	cmd.exe
2056	cmd.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 5 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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	file.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b5522fb2683e7ff30d329d6d7afd7b5eca7b60d581757476bda4925f8f10ddb4.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 3 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
2056	cmd.exe
2720	PING.EXE
2132	PING.EXE

Runs ping.exe 1 TTPs 2 IoCs

Remote System Discovery

T1018

pid	Process
2720	PING.EXE
2132	PING.EXE

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2304	b5522fb2683e7ff30d329d6d7afd7b5eca7b60d581757476bda4925f8f10ddb4.exe
2304	b5522fb2683e7ff30d329d6d7afd7b5eca7b60d581757476bda4925f8f10ddb4.exe
2304	b5522fb2683e7ff30d329d6d7afd7b5eca7b60d581757476bda4925f8f10ddb4.exe
2304	b5522fb2683e7ff30d329d6d7afd7b5eca7b60d581757476bda4925f8f10ddb4.exe
2304	b5522fb2683e7ff30d329d6d7afd7b5eca7b60d581757476bda4925f8f10ddb4.exe
3008	file.exe
3008	file.exe
3008	file.exe
3008	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2304	b5522fb2683e7ff30d329d6d7afd7b5eca7b60d581757476bda4925f8f10ddb4.exe
Token: SeDebugPrivilege	3008	file.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 2304 wrote to memory of 2056	2304	b5522fb2683e7ff30d329d6d7afd7b5eca7b60d581757476bda4925f8f10ddb4.exe	29
PID 2304 wrote to memory of 2056	2304	b5522fb2683e7ff30d329d6d7afd7b5eca7b60d581757476bda4925f8f10ddb4.exe	29
PID 2304 wrote to memory of 2056	2304	b5522fb2683e7ff30d329d6d7afd7b5eca7b60d581757476bda4925f8f10ddb4.exe	29
PID 2304 wrote to memory of 2056	2304	b5522fb2683e7ff30d329d6d7afd7b5eca7b60d581757476bda4925f8f10ddb4.exe	29
PID 2056 wrote to memory of 2720	2056	cmd.exe	31
PID 2056 wrote to memory of 2720	2056	cmd.exe	31
PID 2056 wrote to memory of 2720	2056	cmd.exe	31
PID 2056 wrote to memory of 2720	2056	cmd.exe	31
PID 2056 wrote to memory of 2132	2056	cmd.exe	32
PID 2056 wrote to memory of 2132	2056	cmd.exe	32
PID 2056 wrote to memory of 2132	2056	cmd.exe	32
PID 2056 wrote to memory of 2132	2056	cmd.exe	32
PID 2056 wrote to memory of 3008	2056	cmd.exe	33
PID 2056 wrote to memory of 3008	2056	cmd.exe	33
PID 2056 wrote to memory of 3008	2056	cmd.exe	33
PID 2056 wrote to memory of 3008	2056	cmd.exe	33
PID 3008 wrote to memory of 3052	3008	file.exe	34
PID 3008 wrote to memory of 3052	3008	file.exe	34
PID 3008 wrote to memory of 3052	3008	file.exe	34
PID 3008 wrote to memory of 3052	3008	file.exe	34
PID 3008 wrote to memory of 3052	3008	file.exe	34
PID 3008 wrote to memory of 3052	3008	file.exe	34
PID 3008 wrote to memory of 3052	3008	file.exe	34
PID 3008 wrote to memory of 3052	3008	file.exe	34
PID 3008 wrote to memory of 3052	3008	file.exe	34
PID 3008 wrote to memory of 3052	3008	file.exe	34
PID 3008 wrote to memory of 3052	3008	file.exe	34
PID 3008 wrote to memory of 3052	3008	file.exe	34

C:\Users\Admin\AppData\Local\Temp\b5522fb2683e7ff30d329d6d7afd7b5eca7b60d581757476bda4925f8f10ddb4.exe
"C:\Users\Admin\AppData\Local\Temp\b5522fb2683e7ff30d329d6d7afd7b5eca7b60d581757476bda4925f8f10ddb4.exe"
1⤵
- Drops startup file
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2304
- C:\Windows\SysWOW64\cmd.exe
  "cmd" /c ping 127.0.0.1 -n 42 > nul && copy "C:\Users\Admin\AppData\Local\Temp\b5522fb2683e7ff30d329d6d7afd7b5eca7b60d581757476bda4925f8f10ddb4.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\file.exe" && ping 127.0.0.1 -n 42 > nul && "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\file.exe"
  2⤵
  - Drops startup file
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2056
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 42
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2720
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 42
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2132
- - C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\file.exe
    "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\file.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3008
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
      4⤵
      PID:3052

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\file.exe

Filesize
585KB

MD5
25dbcf1fe03ad12511191f54bff57d76

SHA1
b748178f5756712162edec1e85fa6e0a456bc722

SHA256
b5522fb2683e7ff30d329d6d7afd7b5eca7b60d581757476bda4925f8f10ddb4

SHA512
ecdc722f18d81fbd0dbd164b6bdfec25fa2c3b3bbc3305f2a8c092b4e0607932c2ee0303a3bbadc6f38ff74b406444f1b401d7822727f66fe139796cad13d722

Download Submit
memory/2304-0-0x000000007477E000-0x000000007477F000-memory.dmp

Filesize
4KB

Download
memory/2304-1-0x0000000000230000-0x00000000002C8000-memory.dmp

Filesize
608KB

Download
memory/2304-2-0x0000000074770000-0x0000000074E5E000-memory.dmp

Filesize
6.9MB

Download
memory/2304-3-0x0000000000640000-0x0000000000684000-memory.dmp

Filesize
272KB

Download
memory/2304-5-0x000000007477E000-0x000000007477F000-memory.dmp

Filesize
4KB

Download
memory/2304-6-0x0000000074770000-0x0000000074E5E000-memory.dmp

Filesize
6.9MB

Download
memory/2304-7-0x0000000074770000-0x0000000074E5E000-memory.dmp

Filesize
6.9MB

Download
memory/3008-19-0x0000000000170000-0x0000000000208000-memory.dmp

Filesize
608KB

Download
memory/3008-18-0x000000007379E000-0x000000007379F000-memory.dmp

Filesize
4KB

Download
memory/3008-20-0x0000000001DD0000-0x0000000001DEA000-memory.dmp

Filesize
104KB

Download
memory/3008-21-0x0000000001E30000-0x0000000001E36000-memory.dmp

Filesize
24KB

Download
memory/3052-23-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/3052-24-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/3052-30-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/3052-28-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/3052-26-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download