asyncrat | 28a95a1217828befa28689c543b68ea7e553c74cc8d5a842b229e1814fb6c9f8

General

Target
28a95a1217828befa28689c543b68ea7e553c74cc8d5a842b229e1814fb6c9f8.exe
Size 45KB
Sample260804-hexv5see66
SHA256 28a95a1217828befa28689c543b68ea7e553c74cc8d5a842b229e1814fb6c9f8
MD5 271ed55ac5bd7bfddcb76f93a5a9000f
SHA1 2713bc35327c342e4b1d71c9701cf147573a20e6
SHA512 10b6e6daafb7c515bd0cf3d216e66bf1148f8dc22ea76f3653fdd407bf8ee85c4783902674e1abfbdfb140acdfe9b9b5941f299f39f9e84f530f248d28a1201f
SSDEEP 768:wuDWZTpw7bmaWUg3gSk0mo2qldeeXKSocbbbQtN8/nPI6kzjbJgX3i14KZZVnhfy:wuDWZTpMZSB2FeH2tNKA6k3bGXS14Kl
TLSH
T140233B003BE9C22BF1BF4F7899F36105867AE2632603D95A1CC451DB4723FC68A526ED
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

cwlottery.com:80
cwlottery.com:22
cwlottery.com:8080
cwlottery.com:8880
cwlottery.com:2052
cwlottery.com:2082
cwlottery.com:2086
cwlottery.com:2095
cwlottery.com:443
cwlottery.com:2053
cwlottery.com:2083
cwlottery.com:2087
cwlottery.com:2096
cwlottery.com:8443
www.cwlottery.com:80
www.cwlottery.com:22
www.cwlottery.com:8080
www.cwlottery.com:8880
www.cwlottery.com:2052
www.cwlottery.com:2082
www.cwlottery.com:2086
www.cwlottery.com:2095
www.cwlottery.com:443
www.cwlottery.com:2053
www.cwlottery.com:2083
www.cwlottery.com:2087
www.cwlottery.com:2096
www.cwlottery.com:8443
mirai.cwlottery.com:80
mirai.cwlottery.com:22
mirai.cwlottery.com:8080
mirai.cwlottery.com:8880
mirai.cwlottery.com:2052
mirai.cwlottery.com:2082
mirai.cwlottery.com:2086
mirai.cwlottery.com:2095
mirai.cwlottery.com:443
mirai.cwlottery.com:2053
mirai.cwlottery.com:2083
mirai.cwlottery.com:2087
mirai.cwlottery.com:2096
mirai.cwlottery.com:8443
socgholish.cwlottery.com:80
socgholish.cwlottery.com:22
socgholish.cwlottery.com:8080
socgholish.cwlottery.com:8880
socgholish.cwlottery.com:2052
socgholish.cwlottery.com:2082
socgholish.cwlottery.com:2086
socgholish.cwlottery.com:2095
socgholish.cwlottery.com:443
socgholish.cwlottery.com:2053
socgholish.cwlottery.com:2083
socgholish.cwlottery.com:2087
socgholish.cwlottery.com:2096
socgholish.cwlottery.com:8443

Mutex

RCh68pHbTS3f

Attributes

delay
0
install
true
install_file
wmuxx.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/0x000800000002460b-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-1-5-21-3053180483-1881419501-3594244048-1000\Control Panel\International\Geo\Nation	28a95a1217828befa28689c543b68ea7e553c74cc8d5a842b229e1814fb6c9f8.exe

Executes dropped EXE 2 IoCs

pid	Process
2440	wmuxx.exe
1392	wmuxx.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	52	104.21.17.180:22	2440	wmuxx.exe
SSH destination	56	172.67.177.192:22	2440	wmuxx.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
3136	cmd.exe
3056	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wmuxx.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wmuxx.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	28a95a1217828befa28689c543b68ea7e553c74cc8d5a842b229e1814fb6c9f8.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
872	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
3484	schtasks.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
5960	28a95a1217828befa28689c543b68ea7e553c74cc8d5a842b229e1814fb6c9f8.exe
5960	28a95a1217828befa28689c543b68ea7e553c74cc8d5a842b229e1814fb6c9f8.exe
5960	28a95a1217828befa28689c543b68ea7e553c74cc8d5a842b229e1814fb6c9f8.exe
5960	28a95a1217828befa28689c543b68ea7e553c74cc8d5a842b229e1814fb6c9f8.exe
5960	28a95a1217828befa28689c543b68ea7e553c74cc8d5a842b229e1814fb6c9f8.exe
5960	28a95a1217828befa28689c543b68ea7e553c74cc8d5a842b229e1814fb6c9f8.exe
5960	28a95a1217828befa28689c543b68ea7e553c74cc8d5a842b229e1814fb6c9f8.exe
5960	28a95a1217828befa28689c543b68ea7e553c74cc8d5a842b229e1814fb6c9f8.exe
5960	28a95a1217828befa28689c543b68ea7e553c74cc8d5a842b229e1814fb6c9f8.exe
5960	28a95a1217828befa28689c543b68ea7e553c74cc8d5a842b229e1814fb6c9f8.exe
5960	28a95a1217828befa28689c543b68ea7e553c74cc8d5a842b229e1814fb6c9f8.exe
5960	28a95a1217828befa28689c543b68ea7e553c74cc8d5a842b229e1814fb6c9f8.exe
5960	28a95a1217828befa28689c543b68ea7e553c74cc8d5a842b229e1814fb6c9f8.exe
5960	28a95a1217828befa28689c543b68ea7e553c74cc8d5a842b229e1814fb6c9f8.exe
5960	28a95a1217828befa28689c543b68ea7e553c74cc8d5a842b229e1814fb6c9f8.exe
5960	28a95a1217828befa28689c543b68ea7e553c74cc8d5a842b229e1814fb6c9f8.exe
5960	28a95a1217828befa28689c543b68ea7e553c74cc8d5a842b229e1814fb6c9f8.exe
5960	28a95a1217828befa28689c543b68ea7e553c74cc8d5a842b229e1814fb6c9f8.exe
5960	28a95a1217828befa28689c543b68ea7e553c74cc8d5a842b229e1814fb6c9f8.exe
5960	28a95a1217828befa28689c543b68ea7e553c74cc8d5a842b229e1814fb6c9f8.exe
5960	28a95a1217828befa28689c543b68ea7e553c74cc8d5a842b229e1814fb6c9f8.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5960	28a95a1217828befa28689c543b68ea7e553c74cc8d5a842b229e1814fb6c9f8.exe
Token: SeDebugPrivilege	2440	wmuxx.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 5960 wrote to memory of 3136	5960	28a95a1217828befa28689c543b68ea7e553c74cc8d5a842b229e1814fb6c9f8.exe	86
PID 5960 wrote to memory of 3056	5960	28a95a1217828befa28689c543b68ea7e553c74cc8d5a842b229e1814fb6c9f8.exe	88
PID 3136 wrote to memory of 3484	3136	cmd.exe	90
PID 3056 wrote to memory of 872	3056	cmd.exe	91
PID 3056 wrote to memory of 1392	3056	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\28a95a1217828befa28689c543b68ea7e553c74cc8d5a842b229e1814fb6c9f8.exe
"C:\Users\Admin\AppData\Local\Temp\28a95a1217828befa28689c543b68ea7e553c74cc8d5a842b229e1814fb6c9f8.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5960
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "wmuxx" /tr '"C:\Users\Admin\AppData\Roaming\wmuxx.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3136
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "wmuxx" /tr '"C:\Users\Admin\AppData\Roaming\wmuxx.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3484
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp8BA1.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3056
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:872
- - C:\Users\Admin\AppData\Roaming\wmuxx.exe
    "C:\Users\Admin\AppData\Roaming\wmuxx.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:1392

C:\Users\Admin\AppData\Roaming\wmuxx.exe
"C:\Users\Admin\AppData\Roaming\wmuxx.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2440

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

tmp8BA1.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp8BA1.tmp.bat
Size 149B
SHA256 7f13a2fa553907ff13b28495887cc70fb6b748b99f52312a262da7d8b478c941
MD5 99bc79c59b51a127370e86381904a452
SHA1 66a4c6fc6c4c150ed75c14ee109d14f6a32061bc
SHA512 6146c6f4ee8fe9b86a29bf924469c0ffa633083c1f164bfc1198e0cea0dd65c203d2c5b6773cf37c619103d231c97f261d71f374dc90d63b42ec385a46fe8ba9
TLSH
T11AC02B5352C9EA4E2C45546317FAD58D91B6EC693F40BB40C348410D1380448F0DD342
MD5 SHA1 SHA512 TLSH

Submit Download

wmuxx.exe

Path C:\Users\Admin\AppData\Roaming\wmuxx.exe
Size 45KB
SHA256 28a95a1217828befa28689c543b68ea7e553c74cc8d5a842b229e1814fb6c9f8
MD5 271ed55ac5bd7bfddcb76f93a5a9000f
SHA1 2713bc35327c342e4b1d71c9701cf147573a20e6
SHA512 10b6e6daafb7c515bd0cf3d216e66bf1148f8dc22ea76f3653fdd407bf8ee85c4783902674e1abfbdfb140acdfe9b9b5941f299f39f9e84f530f248d28a1201f
SSDEEP 768:wuDWZTpw7bmaWUg3gSk0mo2qldeeXKSocbbbQtN8/nPI6kzjbJgX3i14KZZVnhfy:wuDWZTpMZSB2FeH2tNKA6k3bGXS14Kl
TLSH
T140233B003BE9C22BF1BF4F7899F36105867AE2632603D95A1CC451DB4723FC68A526ED
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2440-10-0x0000000004CB0000-0x0000000004CC0000-memory.dmp

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memory/2440-13-0x0000000004CB0000-0x0000000004CC0000-memory.dmp

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memory/5960-0-0x00000000008E0000-0x00000000008F2000-memory.dmp

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memory/5960-1-0x0000000005320000-0x0000000005330000-memory.dmp

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memory/5960-2-0x00000000051F0000-0x000000000528C000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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