asyncrat | 498c444fed4dcc06e7a06c01038af2adf73a59bda0916b6c79d90e9acbf57b06

General

Target
498c444fed4dcc06e7a06c01038af2adf73a59bda0916b6c79d90e9acbf57b06.exe
Size 45KB
Sample260919-stem8atsft
SHA256 498c444fed4dcc06e7a06c01038af2adf73a59bda0916b6c79d90e9acbf57b06
MD5 b1cab3de19d4ccfdd750e7ac1130fce5
SHA1 da27675cfe24d7c0b97cb7d1677b95f04d0cc0da
SHA512 585c953e4fac93e11ae31955da50e199d81e30827d7d76c62f1a259dc24a52bcd997a88c117b2d13d6e77021abf9ba67c36a51455dae4f9435aa7ab7f2c676e0
SSDEEP 768:5udApTNctooWUS7C+mo2qthRzMwnOPIZzjbAgX3iLt/ey2uTpYBDZ0x:5udApTNmU2qA+3Z3bnXSLt/eyhQd0x
TLSH
T1C6232B003BE8822BF2BE4F789DF26145867AF2673603D54A1CC4519B5613FC6CA526FE
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

xemphimheo.org:80
xemphimheo.org:22
xemphimheo.org:8080
xemphimheo.org:8880
xemphimheo.org:2052
xemphimheo.org:2082
xemphimheo.org:2086
xemphimheo.org:2095
xemphimheo.org:443
xemphimheo.org:2053
xemphimheo.org:2083
xemphimheo.org:2087
xemphimheo.org:2096
xemphimheo.org:8443
www.xemphimheo.org:80
www.xemphimheo.org:22
www.xemphimheo.org:8080
www.xemphimheo.org:8880
www.xemphimheo.org:2052
www.xemphimheo.org:2082
www.xemphimheo.org:2086
www.xemphimheo.org:2095
www.xemphimheo.org:443
www.xemphimheo.org:2053
www.xemphimheo.org:2083
www.xemphimheo.org:2087
www.xemphimheo.org:2096
www.xemphimheo.org:8443
fakeupdates.xemphimheo.org:80
fakeupdates.xemphimheo.org:22
fakeupdates.xemphimheo.org:8080
fakeupdates.xemphimheo.org:8880
fakeupdates.xemphimheo.org:2052
fakeupdates.xemphimheo.org:2082
fakeupdates.xemphimheo.org:2086
fakeupdates.xemphimheo.org:2095
fakeupdates.xemphimheo.org:443
fakeupdates.xemphimheo.org:2053
fakeupdates.xemphimheo.org:2083
fakeupdates.xemphimheo.org:2087
fakeupdates.xemphimheo.org:2096
fakeupdates.xemphimheo.org:8443
rat.xemphimheo.org:80
rat.xemphimheo.org:22
rat.xemphimheo.org:8080
rat.xemphimheo.org:8880
rat.xemphimheo.org:2052
rat.xemphimheo.org:2082
rat.xemphimheo.org:2086
rat.xemphimheo.org:2095
rat.xemphimheo.org:443
rat.xemphimheo.org:2053
rat.xemphimheo.org:2083
rat.xemphimheo.org:2087
rat.xemphimheo.org:2096
rat.xemphimheo.org:8443

Mutex

4WjTDq4OLh7N

Attributes

delay
0
install
true
install_file
18mikf.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/0x001300000001da5f-8.dat	family_asyncrat
behavioral1/memory/628-10-0x00000000056E0000-0x00000000056F0000-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-1-5-21-2101206053-1414382737-268919432-1000\Control Panel\International\Geo\Nation	498c444fed4dcc06e7a06c01038af2adf73a59bda0916b6c79d90e9acbf57b06.exe

Executes dropped EXE 2 IoCs

pid	Process
628	18mikf.exe
312	18mikf.exe

Outbound SSH connection to public host 2 TTPs 1 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	19	5.61.208.88:22	628	18mikf.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
5060	cmd.exe
3612	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	18mikf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	18mikf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	498c444fed4dcc06e7a06c01038af2adf73a59bda0916b6c79d90e9acbf57b06.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

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4536	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
552	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
3052	498c444fed4dcc06e7a06c01038af2adf73a59bda0916b6c79d90e9acbf57b06.exe
3052	498c444fed4dcc06e7a06c01038af2adf73a59bda0916b6c79d90e9acbf57b06.exe
3052	498c444fed4dcc06e7a06c01038af2adf73a59bda0916b6c79d90e9acbf57b06.exe
3052	498c444fed4dcc06e7a06c01038af2adf73a59bda0916b6c79d90e9acbf57b06.exe
3052	498c444fed4dcc06e7a06c01038af2adf73a59bda0916b6c79d90e9acbf57b06.exe
3052	498c444fed4dcc06e7a06c01038af2adf73a59bda0916b6c79d90e9acbf57b06.exe
3052	498c444fed4dcc06e7a06c01038af2adf73a59bda0916b6c79d90e9acbf57b06.exe
3052	498c444fed4dcc06e7a06c01038af2adf73a59bda0916b6c79d90e9acbf57b06.exe
3052	498c444fed4dcc06e7a06c01038af2adf73a59bda0916b6c79d90e9acbf57b06.exe
3052	498c444fed4dcc06e7a06c01038af2adf73a59bda0916b6c79d90e9acbf57b06.exe
3052	498c444fed4dcc06e7a06c01038af2adf73a59bda0916b6c79d90e9acbf57b06.exe
3052	498c444fed4dcc06e7a06c01038af2adf73a59bda0916b6c79d90e9acbf57b06.exe
3052	498c444fed4dcc06e7a06c01038af2adf73a59bda0916b6c79d90e9acbf57b06.exe
3052	498c444fed4dcc06e7a06c01038af2adf73a59bda0916b6c79d90e9acbf57b06.exe
3052	498c444fed4dcc06e7a06c01038af2adf73a59bda0916b6c79d90e9acbf57b06.exe
3052	498c444fed4dcc06e7a06c01038af2adf73a59bda0916b6c79d90e9acbf57b06.exe
3052	498c444fed4dcc06e7a06c01038af2adf73a59bda0916b6c79d90e9acbf57b06.exe
3052	498c444fed4dcc06e7a06c01038af2adf73a59bda0916b6c79d90e9acbf57b06.exe
3052	498c444fed4dcc06e7a06c01038af2adf73a59bda0916b6c79d90e9acbf57b06.exe
3052	498c444fed4dcc06e7a06c01038af2adf73a59bda0916b6c79d90e9acbf57b06.exe
3052	498c444fed4dcc06e7a06c01038af2adf73a59bda0916b6c79d90e9acbf57b06.exe
3052	498c444fed4dcc06e7a06c01038af2adf73a59bda0916b6c79d90e9acbf57b06.exe
3052	498c444fed4dcc06e7a06c01038af2adf73a59bda0916b6c79d90e9acbf57b06.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3052	498c444fed4dcc06e7a06c01038af2adf73a59bda0916b6c79d90e9acbf57b06.exe
Token: SeDebugPrivilege	628	18mikf.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3052 wrote to memory of 5060	3052	498c444fed4dcc06e7a06c01038af2adf73a59bda0916b6c79d90e9acbf57b06.exe	87
PID 3052 wrote to memory of 3612	3052	498c444fed4dcc06e7a06c01038af2adf73a59bda0916b6c79d90e9acbf57b06.exe	89
PID 3612 wrote to memory of 4536	3612	cmd.exe	91
PID 5060 wrote to memory of 552	5060	cmd.exe	92
PID 3612 wrote to memory of 312	3612	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\498c444fed4dcc06e7a06c01038af2adf73a59bda0916b6c79d90e9acbf57b06.exe
"C:\Users\Admin\AppData\Local\Temp\498c444fed4dcc06e7a06c01038af2adf73a59bda0916b6c79d90e9acbf57b06.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3052
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "18mikf" /tr '"C:\Users\Admin\AppData\Roaming\18mikf.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5060
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "18mikf" /tr '"C:\Users\Admin\AppData\Roaming\18mikf.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:552
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp2B7B.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3612
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4536
- - C:\Users\Admin\AppData\Roaming\18mikf.exe
    "C:\Users\Admin\AppData\Roaming\18mikf.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:312

C:\Users\Admin\AppData\Roaming\18mikf.exe
"C:\Users\Admin\AppData\Roaming\18mikf.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:628

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

Replay Monitor

Loading Replay Monitor...

Downloads

tmp2B7B.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp2B7B.tmp.bat
Size 150B
SHA256 05c0defc756f029d7c847388393ed75227f6092ccb678746aa34a2b1bf83765b
MD5 41dbbee7e9bb52b9265a1471194f225c
SHA1 5297bcbfb677705db6c36a46b561e7b23c2f2eda
SHA512 9dcf96e17d5641224f02b8eef6dc210e3518b643e322a24e990fc2d47f946480b1fcdfb405b1165917a682a2b92df931f8564ec295abee199936a5c53a1a734d
TLSH
T1DEC02B4261CBFA5E3905542307FAD58DE1736C2B3F80BF20C344405D2680C48F4EE385
MD5 SHA1 SHA512 TLSH

Submit Download

18mikf.exe

Path C:\Users\Admin\AppData\Roaming\18mikf.exe
Size 45KB
SHA256 498c444fed4dcc06e7a06c01038af2adf73a59bda0916b6c79d90e9acbf57b06
MD5 b1cab3de19d4ccfdd750e7ac1130fce5
SHA1 da27675cfe24d7c0b97cb7d1677b95f04d0cc0da
SHA512 585c953e4fac93e11ae31955da50e199d81e30827d7d76c62f1a259dc24a52bcd997a88c117b2d13d6e77021abf9ba67c36a51455dae4f9435aa7ab7f2c676e0
SSDEEP 768:5udApTNctooWUS7C+mo2qthRzMwnOPIZzjbAgX3iLt/ey2uTpYBDZ0x:5udApTNmU2qA+3Z3bnXSLt/eyhQd0x
TLSH
T1C6232B003BE8822BF2BE4F789DF26145867AF2673603D54A1CC4519B5613FC6CA526FE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/628-10-0x00000000056E0000-0x00000000056F0000-memory.dmp

Download

memory/628-13-0x00000000056E0000-0x00000000056F0000-memory.dmp

Download

memory/3052-0-0x0000000000BA0000-0x0000000000BB2000-memory.dmp

Download

memory/3052-1-0x00000000054C0000-0x00000000054D0000-memory.dmp

Download

memory/3052-2-0x0000000005410000-0x00000000054AC000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads