asyncrat | 395424796035299147f77d375a985e2067671e0363d12287d96e061fc633e313

General

Target
395424796035299147f77d375a985e2067671e0363d12287d96e061fc633e313.exe
Size 45KB
Sample260805-ravpnattcs
SHA256 395424796035299147f77d375a985e2067671e0363d12287d96e061fc633e313
MD5 1318efa3337eda76041ad12b89de8e3f
SHA1 ff5fd9685bfa4c6b45750006838f292cf88be411
SHA512 213b0357c8d19e625eb12091fc6957be827e76bd46b33ca42791f211b66839ad05a4956fdb5bd0d02e2721edcb9d01be3456964843c32f15b3501dcae299b36a
SSDEEP 768:RuxkJTVmU5EkWUGMKSmo2q1zGsGx8OHuPI2zjbBgg3iolbEjZsPYEBBDZcx:RuxkJTgip2+ez323bugSZjZeYE/dcx
TLSH
T1A3231B003BE9822BF2BE4F7898F26145467AF2633603D5492CC452DB5723FC68A426FD
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

haysexcdn.net:80
haysexcdn.net:22
haysexcdn.net:8080
haysexcdn.net:8880
haysexcdn.net:2052
haysexcdn.net:2082
haysexcdn.net:2086
haysexcdn.net:2095
haysexcdn.net:443
haysexcdn.net:2053
haysexcdn.net:2083
haysexcdn.net:2087
haysexcdn.net:2096
haysexcdn.net:8443
www.haysexcdn.net:80
www.haysexcdn.net:22
www.haysexcdn.net:8080
www.haysexcdn.net:8880
www.haysexcdn.net:2052
www.haysexcdn.net:2082
www.haysexcdn.net:2086
www.haysexcdn.net:2095
www.haysexcdn.net:443
www.haysexcdn.net:2053
www.haysexcdn.net:2083
www.haysexcdn.net:2087
www.haysexcdn.net:2096
www.haysexcdn.net:8443
zbot.haysexcdn.net:80
zbot.haysexcdn.net:22
zbot.haysexcdn.net:8080
zbot.haysexcdn.net:8880
zbot.haysexcdn.net:2052
zbot.haysexcdn.net:2082
zbot.haysexcdn.net:2086
zbot.haysexcdn.net:2095
zbot.haysexcdn.net:443
zbot.haysexcdn.net:2053
zbot.haysexcdn.net:2083
zbot.haysexcdn.net:2087
zbot.haysexcdn.net:2096
zbot.haysexcdn.net:8443
invasive.haysexcdn.net:80
invasive.haysexcdn.net:22
invasive.haysexcdn.net:8080
invasive.haysexcdn.net:8880
invasive.haysexcdn.net:2052
invasive.haysexcdn.net:2082
invasive.haysexcdn.net:2086
invasive.haysexcdn.net:2095
invasive.haysexcdn.net:443
invasive.haysexcdn.net:2053
invasive.haysexcdn.net:2083
invasive.haysexcdn.net:2087
invasive.haysexcdn.net:2096
invasive.haysexcdn.net:8443

Mutex

Boqemkacs1XZ

Attributes

delay
0
install
true
install_file
wkowxv9h.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 2 IoCs

rat

resource	yara_rule
behavioral1/files/0x00120000000243ce-8.dat	family_asyncrat
behavioral1/memory/4696-13-0x0000000005580000-0x0000000005590000-memory.dmp	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-1-5-21-668679576-120646659-2289335452-1000\Control Panel\International\Geo\Nation	395424796035299147f77d375a985e2067671e0363d12287d96e061fc633e313.exe

Executes dropped EXE 2 IoCs

pid	Process
4696	wkowxv9h.exe
1096	wkowxv9h.exe

Outbound SSH connection to public host 2 TTPs 3 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	77	104.26.5.211:22	4696	wkowxv9h.exe
SSH destination	41	172.67.73.19:22	4696	wkowxv9h.exe
SSH destination	60	104.26.4.211:22	4696	wkowxv9h.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
60	cmd.exe
4812	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	395424796035299147f77d375a985e2067671e0363d12287d96e061fc633e313.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wkowxv9h.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wkowxv9h.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
464	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
4500	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
4756	395424796035299147f77d375a985e2067671e0363d12287d96e061fc633e313.exe
4756	395424796035299147f77d375a985e2067671e0363d12287d96e061fc633e313.exe
4756	395424796035299147f77d375a985e2067671e0363d12287d96e061fc633e313.exe
4756	395424796035299147f77d375a985e2067671e0363d12287d96e061fc633e313.exe
4756	395424796035299147f77d375a985e2067671e0363d12287d96e061fc633e313.exe
4756	395424796035299147f77d375a985e2067671e0363d12287d96e061fc633e313.exe
4756	395424796035299147f77d375a985e2067671e0363d12287d96e061fc633e313.exe
4756	395424796035299147f77d375a985e2067671e0363d12287d96e061fc633e313.exe
4756	395424796035299147f77d375a985e2067671e0363d12287d96e061fc633e313.exe
4756	395424796035299147f77d375a985e2067671e0363d12287d96e061fc633e313.exe
4756	395424796035299147f77d375a985e2067671e0363d12287d96e061fc633e313.exe
4756	395424796035299147f77d375a985e2067671e0363d12287d96e061fc633e313.exe
4756	395424796035299147f77d375a985e2067671e0363d12287d96e061fc633e313.exe
4756	395424796035299147f77d375a985e2067671e0363d12287d96e061fc633e313.exe
4756	395424796035299147f77d375a985e2067671e0363d12287d96e061fc633e313.exe
4756	395424796035299147f77d375a985e2067671e0363d12287d96e061fc633e313.exe
4756	395424796035299147f77d375a985e2067671e0363d12287d96e061fc633e313.exe
4756	395424796035299147f77d375a985e2067671e0363d12287d96e061fc633e313.exe
4756	395424796035299147f77d375a985e2067671e0363d12287d96e061fc633e313.exe
4756	395424796035299147f77d375a985e2067671e0363d12287d96e061fc633e313.exe
4756	395424796035299147f77d375a985e2067671e0363d12287d96e061fc633e313.exe
4756	395424796035299147f77d375a985e2067671e0363d12287d96e061fc633e313.exe
4756	395424796035299147f77d375a985e2067671e0363d12287d96e061fc633e313.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4756	395424796035299147f77d375a985e2067671e0363d12287d96e061fc633e313.exe
Token: SeDebugPrivilege	4696	wkowxv9h.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4756 wrote to memory of 60	4756	395424796035299147f77d375a985e2067671e0363d12287d96e061fc633e313.exe	86
PID 4756 wrote to memory of 4812	4756	395424796035299147f77d375a985e2067671e0363d12287d96e061fc633e313.exe	88
PID 4812 wrote to memory of 464	4812	cmd.exe	90
PID 60 wrote to memory of 4500	60	cmd.exe	91
PID 4812 wrote to memory of 1096	4812	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\395424796035299147f77d375a985e2067671e0363d12287d96e061fc633e313.exe
"C:\Users\Admin\AppData\Local\Temp\395424796035299147f77d375a985e2067671e0363d12287d96e061fc633e313.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4756
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "wkowxv9h" /tr '"C:\Users\Admin\AppData\Roaming\wkowxv9h.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:60
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "wkowxv9h" /tr '"C:\Users\Admin\AppData\Roaming\wkowxv9h.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4500
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp5416.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4812
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:464
- - C:\Users\Admin\AppData\Roaming\wkowxv9h.exe
    "C:\Users\Admin\AppData\Roaming\wkowxv9h.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:1096

C:\Users\Admin\AppData\Roaming\wkowxv9h.exe
"C:\Users\Admin\AppData\Roaming\wkowxv9h.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:4696

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

tmp5416.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp5416.tmp.bat
Size 152B
SHA256 b7412238e9af4ffdc4883bca5018449194f81e3e2b8af917ca4c12196e93207b
MD5 2bd7c0bde6ae4796fed4270a59d08ff8
SHA1 318b95d40d980d5b239ed9cd47af1144a5059252
SHA512 8b4f72144d063ac2faaff6254b406f8e7f2450c273a5eee84ac7f01f55593ca25c0dc7175807a3fd561e130dcdc98382421fd62c61f5eecfcd8d6bae5792fa1f
TLSH
T16BC02B9261CAEA1E3806581313FADA9CA177AC5B3F80FB00C304944E228044CF0DD341
MD5 SHA1 SHA512 TLSH

Submit Download

wkowxv9h.exe

Path C:\Users\Admin\AppData\Roaming\wkowxv9h.exe
Size 45KB
SHA256 395424796035299147f77d375a985e2067671e0363d12287d96e061fc633e313
MD5 1318efa3337eda76041ad12b89de8e3f
SHA1 ff5fd9685bfa4c6b45750006838f292cf88be411
SHA512 213b0357c8d19e625eb12091fc6957be827e76bd46b33ca42791f211b66839ad05a4956fdb5bd0d02e2721edcb9d01be3456964843c32f15b3501dcae299b36a
SSDEEP 768:RuxkJTVmU5EkWUGMKSmo2q1zGsGx8OHuPI2zjbBgg3iolbEjZsPYEBBDZcx:RuxkJTgip2+ez323bugSZjZeYE/dcx
TLSH
T1A3231B003BE9822BF2BE4F7898F26145467AF2633603D5492CC452DB5723FC68A426FD
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4696-10-0x0000000005580000-0x0000000005590000-memory.dmp

Download

memory/4696-13-0x0000000005580000-0x0000000005590000-memory.dmp

Download

memory/4756-0-0x0000000000EA0000-0x0000000000EB2000-memory.dmp

Download

memory/4756-1-0x0000000005760000-0x0000000005770000-memory.dmp

Download

memory/4756-2-0x0000000005770000-0x000000000580C000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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