asyncrat | 8af38773d572f845f440064e0557b8ac9c5dafa686efd873ac7572fca677478d

General

Target
tmp6efsb61h.exe
Size 45KB
Sample260602-kbwvsagy8x
SHA256 8af38773d572f845f440064e0557b8ac9c5dafa686efd873ac7572fca677478d
MD5 38b97cfc418dc8941da3588d69450d3c
SHA1 21777d22249f358095697580fe03973063f8c467
SHA512 9b92025967cd8c7522c92cca476b58888e29bdbd2d4994ce211e7fc0df8d69806333f8b080924a4e38b671b2bdec38d25928ff029e471026d66d0eac6534940a
SSDEEP 768:0uPipT/LGKeWUszuAmo2q9C9g6nqvsPIyzjbggX3il/OeVEV+8MBDZ8x:0uPipT/qY2vSCky3bHXSlme+Wd8x
TLSH
T1E5232A003BE9C12BF2BE4F789DF26145867AE6633A03D6491CC411DB1613FC69A526FE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

windermerekelsolongview.com:443
windermerekelsolongview.com:80
windermerekelsolongview.com:7797
windermerekelsolongview.com:8707
windermerekelsolongview.com:6620
www.windermerekelsolongview.com:443
www.windermerekelsolongview.com:80
www.windermerekelsolongview.com:7797
www.windermerekelsolongview.com:8707
www.windermerekelsolongview.com:6620
azorult.windermerekelsolongview.com:443
azorult.windermerekelsolongview.com:80
azorult.windermerekelsolongview.com:7797
azorult.windermerekelsolongview.com:8707
azorult.windermerekelsolongview.com:6620
cl0p.windermerekelsolongview.com:443
cl0p.windermerekelsolongview.com:80
cl0p.windermerekelsolongview.com:7797
cl0p.windermerekelsolongview.com:8707
cl0p.windermerekelsolongview.com:6620

Mutex

KQ4sE43DCW75

Attributes

delay
0
install
true
install_file
ce0wnqe.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 3 IoCs

rat

resource	yara_rule
behavioral2/files/0x0008000000024283-8.dat	family_asyncrat
behavioral2/memory/220-10-0x0000000004A40000-0x0000000004A50000-memory.dmp	family_asyncrat
behavioral2/memory/220-13-0x0000000004A40000-0x0000000004A50000-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-1-5-21-204488895-2999877624-296153668-1000\Control Panel\International\Geo\Nation	tmp6efsb61h.exe

Executes dropped EXE 2 IoCs

pid	Process
220	ce0wnqe.exe
3120	ce0wnqe.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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	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	ce0wnqe.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ce0wnqe.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tmp6efsb61h.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3932	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
4760	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
1092	tmp6efsb61h.exe
1092	tmp6efsb61h.exe
1092	tmp6efsb61h.exe
1092	tmp6efsb61h.exe
1092	tmp6efsb61h.exe
1092	tmp6efsb61h.exe
1092	tmp6efsb61h.exe
1092	tmp6efsb61h.exe
1092	tmp6efsb61h.exe
1092	tmp6efsb61h.exe
1092	tmp6efsb61h.exe
1092	tmp6efsb61h.exe
1092	tmp6efsb61h.exe
1092	tmp6efsb61h.exe
1092	tmp6efsb61h.exe
1092	tmp6efsb61h.exe
1092	tmp6efsb61h.exe
1092	tmp6efsb61h.exe
1092	tmp6efsb61h.exe
1092	tmp6efsb61h.exe
1092	tmp6efsb61h.exe
1092	tmp6efsb61h.exe
1092	tmp6efsb61h.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1092	tmp6efsb61h.exe
Token: SeDebugPrivilege	220	ce0wnqe.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1092 wrote to memory of 3984	1092	tmp6efsb61h.exe	90
PID 1092 wrote to memory of 3480	1092	tmp6efsb61h.exe	92
PID 3480 wrote to memory of 3932	3480	cmd.exe	94
PID 3984 wrote to memory of 4760	3984	cmd.exe	95
PID 3480 wrote to memory of 3120	3480	cmd.exe	99

C:\Users\Admin\AppData\Local\Temp\tmp6efsb61h.exe
"C:\Users\Admin\AppData\Local\Temp\tmp6efsb61h.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1092
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "ce0wnqe" /tr '"C:\Users\Admin\AppData\Roaming\ce0wnqe.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3984
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "ce0wnqe" /tr '"C:\Users\Admin\AppData\Roaming\ce0wnqe.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4760
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp8393.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3480
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3932
- - C:\Users\Admin\AppData\Roaming\ce0wnqe.exe
    "C:\Users\Admin\AppData\Roaming\ce0wnqe.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:3120

C:\Users\Admin\AppData\Roaming\ce0wnqe.exe
"C:\Users\Admin\AppData\Roaming\ce0wnqe.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:220

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

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

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

tmp8393.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp8393.tmp.bat
Size 151B
SHA256 6bf02c7978e274f5f5f86b33be12907192f9f69c69ec7636e4996f66685e46ed
MD5 fb4acf211d875007bd6bcc4432fb6dbd
SHA1 409fa7d600ce13d79d882624cdae51286b308432
SHA512 12f59a7a432d91116126e6af2c71bea7e330878252233df595b039cea33a799156c9b04b794d2e9d79e0030e547f80d6efe8cb94c48d82b1608f6b0837395855
TLSH
T116C02B8361C7EA4FA805542303FED58DD1B2EC2E3F40BB40C308801D2280458F4DD386
MD5 SHA1 SHA512 TLSH

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ce0wnqe.exe

Path C:\Users\Admin\AppData\Roaming\ce0wnqe.exe
Size 45KB
SHA256 8af38773d572f845f440064e0557b8ac9c5dafa686efd873ac7572fca677478d
MD5 38b97cfc418dc8941da3588d69450d3c
SHA1 21777d22249f358095697580fe03973063f8c467
SHA512 9b92025967cd8c7522c92cca476b58888e29bdbd2d4994ce211e7fc0df8d69806333f8b080924a4e38b671b2bdec38d25928ff029e471026d66d0eac6534940a
SSDEEP 768:0uPipT/LGKeWUszuAmo2q9C9g6nqvsPIyzjbggX3il/OeVEV+8MBDZ8x:0uPipT/qY2vSCky3bHXSlme+Wd8x
TLSH
T1E5232A003BE9C12BF2BE4F789DF26145867AE6633A03D6491CC411DB1613FC69A526FE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/220-10-0x0000000004A40000-0x0000000004A50000-memory.dmp

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memory/220-13-0x0000000004A40000-0x0000000004A50000-memory.dmp

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memory/1092-0-0x0000000000820000-0x0000000000832000-memory.dmp

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memory/1092-1-0x0000000002C00000-0x0000000002C10000-memory.dmp

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memory/1092-2-0x0000000005200000-0x000000000529C000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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