asyncrat | b9d3d7e254b6c024fb4295dec9c3ab5b4335654af727f86918cced25ffd934bb

General

Target
b9d3d7e254b6c024fb4295dec9c3ab5b4335654af727f86918cced25ffd934bb.exe
Size 45KB
Sample260907-xe42saep41
SHA256 b9d3d7e254b6c024fb4295dec9c3ab5b4335654af727f86918cced25ffd934bb
MD5 5e042fc24fc8a6cac5f6dd0167d3f31a
SHA1 c78f29ae5408418a5c9ddfda76841b2a99f574ea
SHA512 f47acdca9e715f3f3ff24abf88c36140075f956d41a1f7e5f850ce90314d3ed89fa2c1d5c171be8a1cded579a93cbcfcd04f6b5caf996c2897ca8d63beba2e59
SSDEEP 768:suJdpTP3tcsWUODmqmo2qVT/qpG3jHuPIszjbdgXGiObc+Wk2g14Xh5bIBDZkx:suJdpTPdI2WIM3s3bKXvObXWk2a4Xh51
TLSH
T10A232B003BE8812BF2BE4FB8A8F26145457AF1637602D64D2CC452DB5623FC6DA426FD
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

tvphimjapan.blog:80
tvphimjapan.blog:22
tvphimjapan.blog:8080
tvphimjapan.blog:8880
tvphimjapan.blog:2052
tvphimjapan.blog:2082
tvphimjapan.blog:2086
tvphimjapan.blog:2095
tvphimjapan.blog:443
tvphimjapan.blog:2053
tvphimjapan.blog:2083
tvphimjapan.blog:2087
tvphimjapan.blog:2096
tvphimjapan.blog:8443
www.tvphimjapan.blog:80
www.tvphimjapan.blog:22
www.tvphimjapan.blog:8080
www.tvphimjapan.blog:8880
www.tvphimjapan.blog:2052
www.tvphimjapan.blog:2082
www.tvphimjapan.blog:2086
www.tvphimjapan.blog:2095
www.tvphimjapan.blog:443
www.tvphimjapan.blog:2053
www.tvphimjapan.blog:2083
www.tvphimjapan.blog:2087
www.tvphimjapan.blog:2096
www.tvphimjapan.blog:8443
hack.tvphimjapan.blog:80
hack.tvphimjapan.blog:22
hack.tvphimjapan.blog:8080
hack.tvphimjapan.blog:8880
hack.tvphimjapan.blog:2052
hack.tvphimjapan.blog:2082
hack.tvphimjapan.blog:2086
hack.tvphimjapan.blog:2095
hack.tvphimjapan.blog:443
hack.tvphimjapan.blog:2053
hack.tvphimjapan.blog:2083
hack.tvphimjapan.blog:2087
hack.tvphimjapan.blog:2096
hack.tvphimjapan.blog:8443
client.tvphimjapan.blog:80
client.tvphimjapan.blog:22
client.tvphimjapan.blog:8080
client.tvphimjapan.blog:8880
client.tvphimjapan.blog:2052
client.tvphimjapan.blog:2082
client.tvphimjapan.blog:2086
client.tvphimjapan.blog:2095
client.tvphimjapan.blog:443
client.tvphimjapan.blog:2053
client.tvphimjapan.blog:2083
client.tvphimjapan.blog:2087
client.tvphimjapan.blog:2096
client.tvphimjapan.blog:8443

Mutex

dy8PSULFcNdi

Attributes

delay
0
install
true
install_file
q8dmay9r.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/0x000800000002424d-8.dat	family_asyncrat
behavioral1/memory/4576-13-0x0000000004F20000-0x0000000004F30000-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-1-5-21-889581200-2041691093-2048517887-1000\Control Panel\International\Geo\Nation	b9d3d7e254b6c024fb4295dec9c3ab5b4335654af727f86918cced25ffd934bb.exe

Executes dropped EXE 2 IoCs

pid	Process
4576	q8dmay9r.exe
2804	q8dmay9r.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	71	104.21.31.138:22	4576	q8dmay9r.exe
SSH destination	70	172.67.177.6:22	4576	q8dmay9r.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
4232	cmd.exe
540	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	q8dmay9r.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	q8dmay9r.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b9d3d7e254b6c024fb4295dec9c3ab5b4335654af727f86918cced25ffd934bb.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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3276	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
4612	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
4568	b9d3d7e254b6c024fb4295dec9c3ab5b4335654af727f86918cced25ffd934bb.exe
4568	b9d3d7e254b6c024fb4295dec9c3ab5b4335654af727f86918cced25ffd934bb.exe
4568	b9d3d7e254b6c024fb4295dec9c3ab5b4335654af727f86918cced25ffd934bb.exe
4568	b9d3d7e254b6c024fb4295dec9c3ab5b4335654af727f86918cced25ffd934bb.exe
4568	b9d3d7e254b6c024fb4295dec9c3ab5b4335654af727f86918cced25ffd934bb.exe
4568	b9d3d7e254b6c024fb4295dec9c3ab5b4335654af727f86918cced25ffd934bb.exe
4568	b9d3d7e254b6c024fb4295dec9c3ab5b4335654af727f86918cced25ffd934bb.exe
4568	b9d3d7e254b6c024fb4295dec9c3ab5b4335654af727f86918cced25ffd934bb.exe
4568	b9d3d7e254b6c024fb4295dec9c3ab5b4335654af727f86918cced25ffd934bb.exe
4568	b9d3d7e254b6c024fb4295dec9c3ab5b4335654af727f86918cced25ffd934bb.exe
4568	b9d3d7e254b6c024fb4295dec9c3ab5b4335654af727f86918cced25ffd934bb.exe
4568	b9d3d7e254b6c024fb4295dec9c3ab5b4335654af727f86918cced25ffd934bb.exe
4568	b9d3d7e254b6c024fb4295dec9c3ab5b4335654af727f86918cced25ffd934bb.exe
4568	b9d3d7e254b6c024fb4295dec9c3ab5b4335654af727f86918cced25ffd934bb.exe
4568	b9d3d7e254b6c024fb4295dec9c3ab5b4335654af727f86918cced25ffd934bb.exe
4568	b9d3d7e254b6c024fb4295dec9c3ab5b4335654af727f86918cced25ffd934bb.exe
4568	b9d3d7e254b6c024fb4295dec9c3ab5b4335654af727f86918cced25ffd934bb.exe
4568	b9d3d7e254b6c024fb4295dec9c3ab5b4335654af727f86918cced25ffd934bb.exe
4568	b9d3d7e254b6c024fb4295dec9c3ab5b4335654af727f86918cced25ffd934bb.exe
4568	b9d3d7e254b6c024fb4295dec9c3ab5b4335654af727f86918cced25ffd934bb.exe
4568	b9d3d7e254b6c024fb4295dec9c3ab5b4335654af727f86918cced25ffd934bb.exe
4568	b9d3d7e254b6c024fb4295dec9c3ab5b4335654af727f86918cced25ffd934bb.exe
4568	b9d3d7e254b6c024fb4295dec9c3ab5b4335654af727f86918cced25ffd934bb.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4568	b9d3d7e254b6c024fb4295dec9c3ab5b4335654af727f86918cced25ffd934bb.exe
Token: SeDebugPrivilege	4576	q8dmay9r.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4568 wrote to memory of 4232	4568	b9d3d7e254b6c024fb4295dec9c3ab5b4335654af727f86918cced25ffd934bb.exe	85
PID 4568 wrote to memory of 540	4568	b9d3d7e254b6c024fb4295dec9c3ab5b4335654af727f86918cced25ffd934bb.exe	87
PID 540 wrote to memory of 3276	540	cmd.exe	89
PID 4232 wrote to memory of 4612	4232	cmd.exe	90
PID 540 wrote to memory of 2804	540	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\b9d3d7e254b6c024fb4295dec9c3ab5b4335654af727f86918cced25ffd934bb.exe
"C:\Users\Admin\AppData\Local\Temp\b9d3d7e254b6c024fb4295dec9c3ab5b4335654af727f86918cced25ffd934bb.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4568
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "q8dmay9r" /tr '"C:\Users\Admin\AppData\Roaming\q8dmay9r.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4232
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "q8dmay9r" /tr '"C:\Users\Admin\AppData\Roaming\q8dmay9r.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4612
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp7589.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:540
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3276
- - C:\Users\Admin\AppData\Roaming\q8dmay9r.exe
    "C:\Users\Admin\AppData\Roaming\q8dmay9r.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2804

C:\Users\Admin\AppData\Roaming\q8dmay9r.exe
"C:\Users\Admin\AppData\Roaming\q8dmay9r.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:4576

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

tmp7589.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp7589.tmp.bat
Size 152B
SHA256 ba25d9c7dec68cd65dc72ca0d990d5f1114654c25537fcabd83e21d56f822f8a
MD5 2dda131b3c90b4819d043763549d953b
SHA1 b98dbe21d55092d6afd887ffaa2c893fb1ada65d
SHA512 8bb1f3563b18e0cc9f4af20c2ecbcd623bcdb5aaba8e6de8d42ed4ec38b05aa4e27dbfd532fdfe4a7cc56e4e8fa9c45c3357be08c0aecd7e2f271e8923b37660
TLSH
T1BAC02B4251C6EA0F3905541326FAE8CEE1B37D1D3F45BB10C704880E3680858FCDD381
MD5 SHA1 SHA512 TLSH

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q8dmay9r.exe

Path C:\Users\Admin\AppData\Roaming\q8dmay9r.exe
Size 45KB
SHA256 b9d3d7e254b6c024fb4295dec9c3ab5b4335654af727f86918cced25ffd934bb
MD5 5e042fc24fc8a6cac5f6dd0167d3f31a
SHA1 c78f29ae5408418a5c9ddfda76841b2a99f574ea
SHA512 f47acdca9e715f3f3ff24abf88c36140075f956d41a1f7e5f850ce90314d3ed89fa2c1d5c171be8a1cded579a93cbcfcd04f6b5caf996c2897ca8d63beba2e59
SSDEEP 768:suJdpTP3tcsWUODmqmo2qVT/qpG3jHuPIszjbdgXGiObc+Wk2g14Xh5bIBDZkx:suJdpTPdI2WIM3s3bKXvObXWk2a4Xh51
TLSH
T10A232B003BE8812BF2BE4FB8A8F26145457AF1637602D64D2CC452DB5623FC6DA426FD
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/4568-0-0x0000000000A40000-0x0000000000A52000-memory.dmp

Download

memory/4568-1-0x0000000005300000-0x0000000005310000-memory.dmp

Download

memory/4568-2-0x0000000005310000-0x00000000053AC000-memory.dmp

Download

memory/4576-10-0x0000000004F20000-0x0000000004F30000-memory.dmp

Download

memory/4576-13-0x0000000004F20000-0x0000000004F30000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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