asyncrat | ec06525546060a93432d5299e2109dc4b4b74c73b7e81a48daa3a35c1573cbb8

General

Target
ec06525546060a93432d5299e2109dc4b4b74c73b7e81a48daa3a35c1573cbb8.exe
Size 45KB
Sample260804-wn9syswgrd
SHA256 ec06525546060a93432d5299e2109dc4b4b74c73b7e81a48daa3a35c1573cbb8
MD5 0615759742dacd7f5e1fb58df7072a20
SHA1 ffecb259955bd76264ddb837bc2695d595f1db26
SHA512 562e0429dd48e34e0a4c17f8205b15d5683eaa9b7d56b8aee4598f924272376b49f3ac12bc91c8133fa79811f61fd7c336630f74cd45d10088178f486a901977
SSDEEP 768:5udApTNctooWUS7C+mo2qtjZbtDMQPI8HjbsgX3igpbu8wGb01cHvvluFBDZ0x:5udApTNmU2sJk8DbjXS+uR1ivAd0x
TLSH
T1AE232B0037E8822BF2BE4F7899F26145467AF2673603D58A1CC451DB5723FC696426FE
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
ryuk.haysexcdn.net:80
ryuk.haysexcdn.net:22
ryuk.haysexcdn.net:8080
ryuk.haysexcdn.net:8880
ryuk.haysexcdn.net:2052
ryuk.haysexcdn.net:2082
ryuk.haysexcdn.net:2086
ryuk.haysexcdn.net:2095
ryuk.haysexcdn.net:443
ryuk.haysexcdn.net:2053
ryuk.haysexcdn.net:2083
ryuk.haysexcdn.net:2087
ryuk.haysexcdn.net:2096
ryuk.haysexcdn.net:8443
gootloader.haysexcdn.net:80
gootloader.haysexcdn.net:22
gootloader.haysexcdn.net:8080
gootloader.haysexcdn.net:8880
gootloader.haysexcdn.net:2052
gootloader.haysexcdn.net:2082
gootloader.haysexcdn.net:2086
gootloader.haysexcdn.net:2095
gootloader.haysexcdn.net:443
gootloader.haysexcdn.net:2053
gootloader.haysexcdn.net:2083
gootloader.haysexcdn.net:2087
gootloader.haysexcdn.net:2096
gootloader.haysexcdn.net:8443

Mutex

JwpLPV51wqqZ

Attributes

delay
0
install
true
install_file
wsv9sd.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/0x000300000001e698-8.dat	family_asyncrat
behavioral1/memory/3276-10-0x0000000005560000-0x0000000005570000-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-1-5-21-876885714-46325919-1482798410-1000\Control Panel\International\Geo\Nation	ec06525546060a93432d5299e2109dc4b4b74c73b7e81a48daa3a35c1573cbb8.exe

Executes dropped EXE 2 IoCs

pid	Process
3276	wsv9sd.exe
460	wsv9sd.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	54	104.26.5.211:22	3276	wsv9sd.exe
SSH destination	62	172.67.73.19:22	3276	wsv9sd.exe
SSH destination	64	104.26.4.211:22	3276	wsv9sd.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
3540	cmd.exe
4060	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	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wsv9sd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wsv9sd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ec06525546060a93432d5299e2109dc4b4b74c73b7e81a48daa3a35c1573cbb8.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
2012	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
1480	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
3676	ec06525546060a93432d5299e2109dc4b4b74c73b7e81a48daa3a35c1573cbb8.exe
3676	ec06525546060a93432d5299e2109dc4b4b74c73b7e81a48daa3a35c1573cbb8.exe
3676	ec06525546060a93432d5299e2109dc4b4b74c73b7e81a48daa3a35c1573cbb8.exe
3676	ec06525546060a93432d5299e2109dc4b4b74c73b7e81a48daa3a35c1573cbb8.exe
3676	ec06525546060a93432d5299e2109dc4b4b74c73b7e81a48daa3a35c1573cbb8.exe
3676	ec06525546060a93432d5299e2109dc4b4b74c73b7e81a48daa3a35c1573cbb8.exe
3676	ec06525546060a93432d5299e2109dc4b4b74c73b7e81a48daa3a35c1573cbb8.exe
3676	ec06525546060a93432d5299e2109dc4b4b74c73b7e81a48daa3a35c1573cbb8.exe
3676	ec06525546060a93432d5299e2109dc4b4b74c73b7e81a48daa3a35c1573cbb8.exe
3676	ec06525546060a93432d5299e2109dc4b4b74c73b7e81a48daa3a35c1573cbb8.exe
3676	ec06525546060a93432d5299e2109dc4b4b74c73b7e81a48daa3a35c1573cbb8.exe
3676	ec06525546060a93432d5299e2109dc4b4b74c73b7e81a48daa3a35c1573cbb8.exe
3676	ec06525546060a93432d5299e2109dc4b4b74c73b7e81a48daa3a35c1573cbb8.exe
3676	ec06525546060a93432d5299e2109dc4b4b74c73b7e81a48daa3a35c1573cbb8.exe
3676	ec06525546060a93432d5299e2109dc4b4b74c73b7e81a48daa3a35c1573cbb8.exe
3676	ec06525546060a93432d5299e2109dc4b4b74c73b7e81a48daa3a35c1573cbb8.exe
3676	ec06525546060a93432d5299e2109dc4b4b74c73b7e81a48daa3a35c1573cbb8.exe
3676	ec06525546060a93432d5299e2109dc4b4b74c73b7e81a48daa3a35c1573cbb8.exe
3676	ec06525546060a93432d5299e2109dc4b4b74c73b7e81a48daa3a35c1573cbb8.exe
3676	ec06525546060a93432d5299e2109dc4b4b74c73b7e81a48daa3a35c1573cbb8.exe
3676	ec06525546060a93432d5299e2109dc4b4b74c73b7e81a48daa3a35c1573cbb8.exe
3676	ec06525546060a93432d5299e2109dc4b4b74c73b7e81a48daa3a35c1573cbb8.exe
3676	ec06525546060a93432d5299e2109dc4b4b74c73b7e81a48daa3a35c1573cbb8.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3676	ec06525546060a93432d5299e2109dc4b4b74c73b7e81a48daa3a35c1573cbb8.exe
Token: SeDebugPrivilege	3276	wsv9sd.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3676 wrote to memory of 3540	3676	ec06525546060a93432d5299e2109dc4b4b74c73b7e81a48daa3a35c1573cbb8.exe	87
PID 3676 wrote to memory of 4060	3676	ec06525546060a93432d5299e2109dc4b4b74c73b7e81a48daa3a35c1573cbb8.exe	89
PID 4060 wrote to memory of 2012	4060	cmd.exe	91
PID 3540 wrote to memory of 1480	3540	cmd.exe	92
PID 4060 wrote to memory of 460	4060	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\ec06525546060a93432d5299e2109dc4b4b74c73b7e81a48daa3a35c1573cbb8.exe
"C:\Users\Admin\AppData\Local\Temp\ec06525546060a93432d5299e2109dc4b4b74c73b7e81a48daa3a35c1573cbb8.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3676
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "wsv9sd" /tr '"C:\Users\Admin\AppData\Roaming\wsv9sd.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3540
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "wsv9sd" /tr '"C:\Users\Admin\AppData\Roaming\wsv9sd.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1480
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp3A06.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4060
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2012
- - C:\Users\Admin\AppData\Roaming\wsv9sd.exe
    "C:\Users\Admin\AppData\Roaming\wsv9sd.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:460

C:\Users\Admin\AppData\Roaming\wsv9sd.exe
"C:\Users\Admin\AppData\Roaming\wsv9sd.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:3276

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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tmp3A06.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp3A06.tmp.bat
Size 150B
SHA256 a94576582c4f41be79e2a353c36b8f6f3e3416abe7047da1c1715d9a4215dfab
MD5 448de89fb8d313d4d0bfa28b0ca9a368
SHA1 079438916aae6b15586329aa3f3d42c191e348d8
SHA512 43f67e82c3f3adde3cad55261df273e8519ceac725c0140be802bf57ef26611018aef6423570380650c6e055dcef169d0836b03a2afba30d49079c836e9419ce
TLSH
T121C08C4251C5AA5E6805542302BAD68CA16668193E40AB10C304800DA281849E8AD251
MD5 SHA1 SHA512 TLSH

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wsv9sd.exe

Path C:\Users\Admin\AppData\Roaming\wsv9sd.exe
Size 45KB
SHA256 ec06525546060a93432d5299e2109dc4b4b74c73b7e81a48daa3a35c1573cbb8
MD5 0615759742dacd7f5e1fb58df7072a20
SHA1 ffecb259955bd76264ddb837bc2695d595f1db26
SHA512 562e0429dd48e34e0a4c17f8205b15d5683eaa9b7d56b8aee4598f924272376b49f3ac12bc91c8133fa79811f61fd7c336630f74cd45d10088178f486a901977
SSDEEP 768:5udApTNctooWUS7C+mo2qtjZbtDMQPI8HjbsgX3igpbu8wGb01cHvvluFBDZ0x:5udApTNmU2sJk8DbjXS+uR1ivAd0x
TLSH
T1AE232B0037E8822BF2BE4F7899F26145467AF2673603D58A1CC451DB5723FC696426FE
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/3276-10-0x0000000005560000-0x0000000005570000-memory.dmp

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memory/3276-13-0x0000000005560000-0x0000000005570000-memory.dmp

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memory/3676-0-0x00000000002E0000-0x00000000002F2000-memory.dmp

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memory/3676-1-0x0000000004C90000-0x0000000004CA0000-memory.dmp

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memory/3676-2-0x0000000004CA0000-0x0000000004D3C000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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