asyncrat | 346e7da173c531cd88eaecb645ab68a242078f90bcfa9882dc7b8eb7dccf54d3

General

Target
346e7da173c531cd88eaecb645ab68a242078f90bcfa9882dc7b8eb7dccf54d3.exe
Size 45KB
Sample260804-pwwsqseq7w
SHA256 346e7da173c531cd88eaecb645ab68a242078f90bcfa9882dc7b8eb7dccf54d3
MD5 b827d8c68a637a38cc7816edaaa8c143
SHA1 42ca66b666058cb5e49907088fd8a6b959e52057
SHA512 3daa2f88e0a3f26fbc90af835c3bb81cc325225577a193bcbb6bfb3d71f752ce55d7f82bd7089393ccc36ce663f3aa5ba093ca96c3771af2d0ede03426b694bd
SSDEEP 768:RuxkJTVmU5EkWUGMKSmo2q1eb3/GYjHuPInzjbTgXciA+ECQfp/c6sbNsURFoBDY:RuxkJTgip2zL/3n3bMXZDEC2rSNsqwde
TLSH
T19C232C003BE9812BF2BF5F7898F26205467AF2637603D6491CC451DB5623FC69A426FD
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default command_and_control defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

vnsextop1.com:80
vnsextop1.com:22
vnsextop1.com:8080
vnsextop1.com:8880
vnsextop1.com:2052
vnsextop1.com:2082
vnsextop1.com:2086
vnsextop1.com:2095
vnsextop1.com:443
vnsextop1.com:2053
vnsextop1.com:2083
vnsextop1.com:2087
vnsextop1.com:2096
vnsextop1.com:8443
www.vnsextop1.com:80
www.vnsextop1.com:22
www.vnsextop1.com:8080
www.vnsextop1.com:8880
www.vnsextop1.com:2052
www.vnsextop1.com:2082
www.vnsextop1.com:2086
www.vnsextop1.com:2095
www.vnsextop1.com:443
www.vnsextop1.com:2053
www.vnsextop1.com:2083
www.vnsextop1.com:2087
www.vnsextop1.com:2096
www.vnsextop1.com:8443
mirai.vnsextop1.com:80
mirai.vnsextop1.com:22
mirai.vnsextop1.com:8080
mirai.vnsextop1.com:8880
mirai.vnsextop1.com:2052
mirai.vnsextop1.com:2082
mirai.vnsextop1.com:2086
mirai.vnsextop1.com:2095
mirai.vnsextop1.com:443
mirai.vnsextop1.com:2053
mirai.vnsextop1.com:2083
mirai.vnsextop1.com:2087
mirai.vnsextop1.com:2096
mirai.vnsextop1.com:8443
revil.vnsextop1.com:80
revil.vnsextop1.com:22
revil.vnsextop1.com:8080
revil.vnsextop1.com:8880
revil.vnsextop1.com:2052
revil.vnsextop1.com:2082
revil.vnsextop1.com:2086
revil.vnsextop1.com:2095
revil.vnsextop1.com:443
revil.vnsextop1.com:2053
revil.vnsextop1.com:2083
revil.vnsextop1.com:2087
revil.vnsextop1.com:2096
revil.vnsextop1.com:8443

Mutex

7DDYDufi8Bbc

Attributes

delay
0
install
true
install_file
zl3efl5p.exe
install_folder
%AppData%

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x000300000001e69b-8.dat	family_asyncrat

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2937465464-4167303362-2236413517-1000\Control Panel\International\Geo\Nation	346e7da173c531cd88eaecb645ab68a242078f90bcfa9882dc7b8eb7dccf54d3.exe

Executes dropped EXE 2 IoCs

pid	Process
2188	zl3efl5p.exe
4256	zl3efl5p.exe

Outbound SSH connection to public host 2 TTPs 2 IoCs

SSH is used for remote access. This may indicate SSH host discovery, encrypted C2 traffic, or data exfiltration.

command_and_control

Protocol Tunneling

T1572

Network Service Discovery

T1046

description	flow	ioc	pid	Process
SSH destination	23	185.100.234.69:22	2188	zl3efl5p.exe
SSH destination	53	185.100.234.69:22	2188	zl3efl5p.exe

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

System Information Discovery
T1082

Executes a command shell one-liner 1 TTPs 2 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
3728	cmd.exe
2564	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 7 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	346e7da173c531cd88eaecb645ab68a242078f90bcfa9882dc7b8eb7dccf54d3.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	zl3efl5p.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	zl3efl5p.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
1160	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2872	schtasks.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
1980	346e7da173c531cd88eaecb645ab68a242078f90bcfa9882dc7b8eb7dccf54d3.exe
1980	346e7da173c531cd88eaecb645ab68a242078f90bcfa9882dc7b8eb7dccf54d3.exe
1980	346e7da173c531cd88eaecb645ab68a242078f90bcfa9882dc7b8eb7dccf54d3.exe
1980	346e7da173c531cd88eaecb645ab68a242078f90bcfa9882dc7b8eb7dccf54d3.exe
1980	346e7da173c531cd88eaecb645ab68a242078f90bcfa9882dc7b8eb7dccf54d3.exe
1980	346e7da173c531cd88eaecb645ab68a242078f90bcfa9882dc7b8eb7dccf54d3.exe
1980	346e7da173c531cd88eaecb645ab68a242078f90bcfa9882dc7b8eb7dccf54d3.exe
1980	346e7da173c531cd88eaecb645ab68a242078f90bcfa9882dc7b8eb7dccf54d3.exe
1980	346e7da173c531cd88eaecb645ab68a242078f90bcfa9882dc7b8eb7dccf54d3.exe
1980	346e7da173c531cd88eaecb645ab68a242078f90bcfa9882dc7b8eb7dccf54d3.exe
1980	346e7da173c531cd88eaecb645ab68a242078f90bcfa9882dc7b8eb7dccf54d3.exe
1980	346e7da173c531cd88eaecb645ab68a242078f90bcfa9882dc7b8eb7dccf54d3.exe
1980	346e7da173c531cd88eaecb645ab68a242078f90bcfa9882dc7b8eb7dccf54d3.exe
1980	346e7da173c531cd88eaecb645ab68a242078f90bcfa9882dc7b8eb7dccf54d3.exe
1980	346e7da173c531cd88eaecb645ab68a242078f90bcfa9882dc7b8eb7dccf54d3.exe
1980	346e7da173c531cd88eaecb645ab68a242078f90bcfa9882dc7b8eb7dccf54d3.exe
1980	346e7da173c531cd88eaecb645ab68a242078f90bcfa9882dc7b8eb7dccf54d3.exe
1980	346e7da173c531cd88eaecb645ab68a242078f90bcfa9882dc7b8eb7dccf54d3.exe
1980	346e7da173c531cd88eaecb645ab68a242078f90bcfa9882dc7b8eb7dccf54d3.exe
1980	346e7da173c531cd88eaecb645ab68a242078f90bcfa9882dc7b8eb7dccf54d3.exe
1980	346e7da173c531cd88eaecb645ab68a242078f90bcfa9882dc7b8eb7dccf54d3.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1980	346e7da173c531cd88eaecb645ab68a242078f90bcfa9882dc7b8eb7dccf54d3.exe
Token: SeDebugPrivilege	2188	zl3efl5p.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1980 wrote to memory of 2564	1980	346e7da173c531cd88eaecb645ab68a242078f90bcfa9882dc7b8eb7dccf54d3.exe	86
PID 1980 wrote to memory of 3728	1980	346e7da173c531cd88eaecb645ab68a242078f90bcfa9882dc7b8eb7dccf54d3.exe	88
PID 2564 wrote to memory of 2872	2564	cmd.exe	90
PID 3728 wrote to memory of 1160	3728	cmd.exe	91
PID 3728 wrote to memory of 4256	3728	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\346e7da173c531cd88eaecb645ab68a242078f90bcfa9882dc7b8eb7dccf54d3.exe
"C:\Users\Admin\AppData\Local\Temp\346e7da173c531cd88eaecb645ab68a242078f90bcfa9882dc7b8eb7dccf54d3.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1980
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "zl3efl5p" /tr '"C:\Users\Admin\AppData\Roaming\zl3efl5p.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2564
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "zl3efl5p" /tr '"C:\Users\Admin\AppData\Roaming\zl3efl5p.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2872
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp1BD0.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3728
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1160
- - C:\Users\Admin\AppData\Roaming\zl3efl5p.exe
    "C:\Users\Admin\AppData\Roaming\zl3efl5p.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4256

C:\Users\Admin\AppData\Roaming\zl3efl5p.exe
"C:\Users\Admin\AppData\Roaming\zl3efl5p.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2188

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Network Service Discovery

Query Registry

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Protocol Tunneling

1

T1572

Exfiltration

Impact

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Downloads

tmp1BD0.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp1BD0.tmp.bat
Size 152B
SHA256 fefb80a1eb73247e78c974f3dd7659c6d3e04284283db88e4c687a568566bf30
MD5 e44048a52e5caabcd6eefbb29552bf0d
SHA1 cbe4254c4db94f76e083434409d48d01cd12c606
SHA512 d438f1b81f213bff021983f22149182330d8938a6538eeb2b6372cfd432710a305737664879078ba9720b840669fe5ea30f12a553628623fa3f72629924c0c6a
TLSH
T1D3C02B4351C5EA1F2D0E145326FAE8DE9573AC5F3F40BF40D304400D1680448F4DD381
MD5 SHA1 SHA512 TLSH

Submit Download

zl3efl5p.exe

Path C:\Users\Admin\AppData\Roaming\zl3efl5p.exe
Size 45KB
SHA256 346e7da173c531cd88eaecb645ab68a242078f90bcfa9882dc7b8eb7dccf54d3
MD5 b827d8c68a637a38cc7816edaaa8c143
SHA1 42ca66b666058cb5e49907088fd8a6b959e52057
SHA512 3daa2f88e0a3f26fbc90af835c3bb81cc325225577a193bcbb6bfb3d71f752ce55d7f82bd7089393ccc36ce663f3aa5ba093ca96c3771af2d0ede03426b694bd
SSDEEP 768:RuxkJTVmU5EkWUGMKSmo2q1eb3/GYjHuPInzjbTgXciA+ECQfp/c6sbNsURFoBDY:RuxkJTgip2zL/3n3bMXZDEC2rSNsqwde
TLSH
T19C232C003BE9812BF2BF5F7898F26205467AF2637603D6491CC451DB5623FC69A426FD
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1980-0-0x0000000000860000-0x0000000000872000-memory.dmp

Download

memory/1980-1-0x0000000005280000-0x0000000005290000-memory.dmp

Download

memory/1980-2-0x0000000005290000-0x000000000532C000-memory.dmp

Download

memory/2188-10-0x0000000005120000-0x0000000005130000-memory.dmp

Download

memory/2188-13-0x0000000005120000-0x0000000005130000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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