asyncrat | aa1a0d144c6cbdf2a4a82a5f4c58bef2743ce6dba808bf198f30f782b09ab892

General

Target
aa1a0d144c6cbdf2a4a82a5f4c58bef2743ce6dba808bf198f30f782b09ab892.exe
Size 45KB
Sample260801-rrfxts1xes
SHA256 aa1a0d144c6cbdf2a4a82a5f4c58bef2743ce6dba808bf198f30f782b09ab892
MD5 09dfbd0f7d0145e15fc170e89ed13073
SHA1 c90cd0d6c1fa4b2e41b4522847a42d4f8ebc56a4
SHA512 dc8821762ca7bf9188f994bf8540ae1f2021d8387a233aba986a7955d3643a640caccc79dee36fc2fec07622b4cf29729cad6b76cf22a46e76b25e313f33cb8f
SSDEEP 768:4uBfJTMUyYUWUWBDimo2qVvL5P02FUFdxYkk8PIkzjb+gX3iGLMGXYje+L3NBDZV:4uBfJTMpv2CLDmWBk3bBXSGLMGXYK+LD
TLSH
T1AC231B0037E9812BF2BE4F7869F26245467AF6732603D5891C8451DB5B23BC68A43AFD
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

heovl.im:80
heovl.im:22
heovl.im:8080
heovl.im:8880
heovl.im:2052
heovl.im:2082
heovl.im:2086
heovl.im:2095
heovl.im:443
heovl.im:2053
heovl.im:2083
heovl.im:2087
heovl.im:2096
heovl.im:8443
www.heovl.im:80
www.heovl.im:22
www.heovl.im:8080
www.heovl.im:8880
www.heovl.im:2052
www.heovl.im:2082
www.heovl.im:2086
www.heovl.im:2095
www.heovl.im:443
www.heovl.im:2053
www.heovl.im:2083
www.heovl.im:2087
www.heovl.im:2096
www.heovl.im:8443
wannacry.heovl.im:80
wannacry.heovl.im:22
wannacry.heovl.im:8080
wannacry.heovl.im:8880
wannacry.heovl.im:2052
wannacry.heovl.im:2082
wannacry.heovl.im:2086
wannacry.heovl.im:2095
wannacry.heovl.im:443
wannacry.heovl.im:2053
wannacry.heovl.im:2083
wannacry.heovl.im:2087
wannacry.heovl.im:2096
wannacry.heovl.im:8443
agenttesla.heovl.im:80
agenttesla.heovl.im:22
agenttesla.heovl.im:8080
agenttesla.heovl.im:8880
agenttesla.heovl.im:2052
agenttesla.heovl.im:2082
agenttesla.heovl.im:2086
agenttesla.heovl.im:2095
agenttesla.heovl.im:443
agenttesla.heovl.im:2053
agenttesla.heovl.im:2083
agenttesla.heovl.im:2087
agenttesla.heovl.im:2096
agenttesla.heovl.im:8443

Mutex

GJ26yDA0D6hM

Attributes

delay
0
install
true
install_file
avt3.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/0x0008000000024361-8.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-1-5-21-1788976790-1541110888-1636651838-1000\Control Panel\International\Geo\Nation	aa1a0d144c6cbdf2a4a82a5f4c58bef2743ce6dba808bf198f30f782b09ab892.exe

Executes dropped EXE 2 IoCs

pid	Process
552	avt3.exe
3752	avt3.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	72	172.67.71.133:22	552	avt3.exe
SSH destination	55	104.26.6.168:22	552	avt3.exe
SSH destination	62	104.26.7.168:22	552	avt3.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
2756	cmd.exe
536	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	avt3.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	aa1a0d144c6cbdf2a4a82a5f4c58bef2743ce6dba808bf198f30f782b09ab892.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	avt3.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3464	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
2212	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
3860	aa1a0d144c6cbdf2a4a82a5f4c58bef2743ce6dba808bf198f30f782b09ab892.exe
3860	aa1a0d144c6cbdf2a4a82a5f4c58bef2743ce6dba808bf198f30f782b09ab892.exe
3860	aa1a0d144c6cbdf2a4a82a5f4c58bef2743ce6dba808bf198f30f782b09ab892.exe
3860	aa1a0d144c6cbdf2a4a82a5f4c58bef2743ce6dba808bf198f30f782b09ab892.exe
3860	aa1a0d144c6cbdf2a4a82a5f4c58bef2743ce6dba808bf198f30f782b09ab892.exe
3860	aa1a0d144c6cbdf2a4a82a5f4c58bef2743ce6dba808bf198f30f782b09ab892.exe
3860	aa1a0d144c6cbdf2a4a82a5f4c58bef2743ce6dba808bf198f30f782b09ab892.exe
3860	aa1a0d144c6cbdf2a4a82a5f4c58bef2743ce6dba808bf198f30f782b09ab892.exe
3860	aa1a0d144c6cbdf2a4a82a5f4c58bef2743ce6dba808bf198f30f782b09ab892.exe
3860	aa1a0d144c6cbdf2a4a82a5f4c58bef2743ce6dba808bf198f30f782b09ab892.exe
3860	aa1a0d144c6cbdf2a4a82a5f4c58bef2743ce6dba808bf198f30f782b09ab892.exe
3860	aa1a0d144c6cbdf2a4a82a5f4c58bef2743ce6dba808bf198f30f782b09ab892.exe
3860	aa1a0d144c6cbdf2a4a82a5f4c58bef2743ce6dba808bf198f30f782b09ab892.exe
3860	aa1a0d144c6cbdf2a4a82a5f4c58bef2743ce6dba808bf198f30f782b09ab892.exe
3860	aa1a0d144c6cbdf2a4a82a5f4c58bef2743ce6dba808bf198f30f782b09ab892.exe
3860	aa1a0d144c6cbdf2a4a82a5f4c58bef2743ce6dba808bf198f30f782b09ab892.exe
3860	aa1a0d144c6cbdf2a4a82a5f4c58bef2743ce6dba808bf198f30f782b09ab892.exe
3860	aa1a0d144c6cbdf2a4a82a5f4c58bef2743ce6dba808bf198f30f782b09ab892.exe
3860	aa1a0d144c6cbdf2a4a82a5f4c58bef2743ce6dba808bf198f30f782b09ab892.exe
3860	aa1a0d144c6cbdf2a4a82a5f4c58bef2743ce6dba808bf198f30f782b09ab892.exe
3860	aa1a0d144c6cbdf2a4a82a5f4c58bef2743ce6dba808bf198f30f782b09ab892.exe
3860	aa1a0d144c6cbdf2a4a82a5f4c58bef2743ce6dba808bf198f30f782b09ab892.exe
3860	aa1a0d144c6cbdf2a4a82a5f4c58bef2743ce6dba808bf198f30f782b09ab892.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3860	aa1a0d144c6cbdf2a4a82a5f4c58bef2743ce6dba808bf198f30f782b09ab892.exe
Token: SeDebugPrivilege	552	avt3.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3860 wrote to memory of 2756	3860	aa1a0d144c6cbdf2a4a82a5f4c58bef2743ce6dba808bf198f30f782b09ab892.exe	84
PID 3860 wrote to memory of 536	3860	aa1a0d144c6cbdf2a4a82a5f4c58bef2743ce6dba808bf198f30f782b09ab892.exe	86
PID 536 wrote to memory of 3464	536	cmd.exe	88
PID 2756 wrote to memory of 2212	2756	cmd.exe	89
PID 536 wrote to memory of 3752	536	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\aa1a0d144c6cbdf2a4a82a5f4c58bef2743ce6dba808bf198f30f782b09ab892.exe
"C:\Users\Admin\AppData\Local\Temp\aa1a0d144c6cbdf2a4a82a5f4c58bef2743ce6dba808bf198f30f782b09ab892.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3860
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "avt3" /tr '"C:\Users\Admin\AppData\Roaming\avt3.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2756
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "avt3" /tr '"C:\Users\Admin\AppData\Roaming\avt3.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2212
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp11AE.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:536
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3464
- - C:\Users\Admin\AppData\Roaming\avt3.exe
    "C:\Users\Admin\AppData\Roaming\avt3.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:3752

C:\Users\Admin\AppData\Roaming\avt3.exe
"C:\Users\Admin\AppData\Roaming\avt3.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:552

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

tmp11AE.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp11AE.tmp.bat
Size 148B
SHA256 64b0890ca8d836a3e938c90562ddb55171521beaa358a0dd8dce1652edb80c42
MD5 53529ee2f6dfbb7aca12620d142c3900
SHA1 f272321bbef4d8b5e0fc7ec2c8ac276e777021e3
SHA512 9a994c9652af46d65f75aacd86cd30ea02904a7a8c75deed2df98b61da3dd8a07151ba9cafdaacfd67f5342a1d0ee5c5fdbfb9bee43d6fe2250a4d11264a4894
TLSH
T14DC02BB395C9EA1F2909345302FAD8CCD1726C5D3F40BB40C704450D1380488F0DA341
MD5 SHA1 SHA512 TLSH

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avt3.exe

Path C:\Users\Admin\AppData\Roaming\avt3.exe
Size 45KB
SHA256 aa1a0d144c6cbdf2a4a82a5f4c58bef2743ce6dba808bf198f30f782b09ab892
MD5 09dfbd0f7d0145e15fc170e89ed13073
SHA1 c90cd0d6c1fa4b2e41b4522847a42d4f8ebc56a4
SHA512 dc8821762ca7bf9188f994bf8540ae1f2021d8387a233aba986a7955d3643a640caccc79dee36fc2fec07622b4cf29729cad6b76cf22a46e76b25e313f33cb8f
SSDEEP 768:4uBfJTMUyYUWUWBDimo2qVvL5P02FUFdxYkk8PIkzjb+gX3iGLMGXYje+L3NBDZV:4uBfJTMpv2CLDmWBk3bBXSGLMGXYK+LD
TLSH
T1AC231B0037E9812BF2BE4F7869F26245467AF6732603D5891C8451DB5B23BC68A43AFD
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/552-10-0x00000000054D0000-0x00000000054E0000-memory.dmp

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memory/552-13-0x00000000054D0000-0x00000000054E0000-memory.dmp

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memory/3860-0-0x00000000003E0000-0x00000000003F2000-memory.dmp

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memory/3860-1-0x0000000004D70000-0x0000000004D80000-memory.dmp

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memory/3860-2-0x0000000004C60000-0x0000000004CFC000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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