asyncrat | 3d98c5e90e13be562fc8ca1af47a266aba95b40c7257413d1bb8eb556573c234

General

Target
3d98c5e90e13be562fc8ca1af47a266aba95b40c7257413d1bb8eb556573c234.exe
Size 45KB
Sample260907-w8l8ds1xev
SHA256 3d98c5e90e13be562fc8ca1af47a266aba95b40c7257413d1bb8eb556573c234
MD5 a81ab9cbd761ae6376f34fc4347f089e
SHA1 74578ecbac8ddaa161e34096aad3ee124a297dd7
SHA512 0962015ad2b255e647b355c003205a551704c519f9b7b277dee0f55d68af1c7e28ba0421b41e16c06872c487754ccb66026b83d73e931648919db9b3df5af87d
SSDEEP 768:vuogpT78XvEsWUOsRzqmo2qrrb3/GYjHuPInzjbtgXKiaQLyf7mQG+BDZkx:vuogpT7I62gL/3n3b6Xz92TmOdkx
TLSH
T12E233B003BE9C127F2BE4FB898F26146467AF6636603D64D2CC452DB5613FC29A426FD
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

clip-cuchot.net:80
clip-cuchot.net:22
clip-cuchot.net:8080
clip-cuchot.net:8880
clip-cuchot.net:2052
clip-cuchot.net:2082
clip-cuchot.net:2086
clip-cuchot.net:2095
clip-cuchot.net:443
clip-cuchot.net:2053
clip-cuchot.net:2083
clip-cuchot.net:2087
clip-cuchot.net:2096
clip-cuchot.net:8443
www.clip-cuchot.net:80
www.clip-cuchot.net:22
www.clip-cuchot.net:8080
www.clip-cuchot.net:8880
www.clip-cuchot.net:2052
www.clip-cuchot.net:2082
www.clip-cuchot.net:2086
www.clip-cuchot.net:2095
www.clip-cuchot.net:443
www.clip-cuchot.net:2053
www.clip-cuchot.net:2083
www.clip-cuchot.net:2087
www.clip-cuchot.net:2096
www.clip-cuchot.net:8443
lokibot.clip-cuchot.net:80
lokibot.clip-cuchot.net:22
lokibot.clip-cuchot.net:8080
lokibot.clip-cuchot.net:8880
lokibot.clip-cuchot.net:2052
lokibot.clip-cuchot.net:2082
lokibot.clip-cuchot.net:2086
lokibot.clip-cuchot.net:2095
lokibot.clip-cuchot.net:443
lokibot.clip-cuchot.net:2053
lokibot.clip-cuchot.net:2083
lokibot.clip-cuchot.net:2087
lokibot.clip-cuchot.net:2096
lokibot.clip-cuchot.net:8443
gootloader.clip-cuchot.net:80
gootloader.clip-cuchot.net:22
gootloader.clip-cuchot.net:8080
gootloader.clip-cuchot.net:8880
gootloader.clip-cuchot.net:2052
gootloader.clip-cuchot.net:2082
gootloader.clip-cuchot.net:2086
gootloader.clip-cuchot.net:2095
gootloader.clip-cuchot.net:443
gootloader.clip-cuchot.net:2053
gootloader.clip-cuchot.net:2083
gootloader.clip-cuchot.net:2087
gootloader.clip-cuchot.net:2096
gootloader.clip-cuchot.net:8443
remote.clip-cuchot.net:80
remote.clip-cuchot.net:22
remote.clip-cuchot.net:8080
remote.clip-cuchot.net:8880
remote.clip-cuchot.net:2052
remote.clip-cuchot.net:2082
remote.clip-cuchot.net:2086
remote.clip-cuchot.net:2095
remote.clip-cuchot.net:443
remote.clip-cuchot.net:2053
remote.clip-cuchot.net:2083
remote.clip-cuchot.net:2087
remote.clip-cuchot.net:2096
remote.clip-cuchot.net:8443
client.clip-cuchot.net:80
client.clip-cuchot.net:22
client.clip-cuchot.net:8080
client.clip-cuchot.net:8880
client.clip-cuchot.net:2052
client.clip-cuchot.net:2082
client.clip-cuchot.net:2086
client.clip-cuchot.net:2095
client.clip-cuchot.net:443
client.clip-cuchot.net:2053
client.clip-cuchot.net:2083
client.clip-cuchot.net:2087
client.clip-cuchot.net:2096
client.clip-cuchot.net:8443

Mutex

BZ5voUuiHLFO

Attributes

delay
0
install
true
install_file
kldsompo.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/0x001100000002435f-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-1-5-21-540052884-2969440504-464782435-1000\Control Panel\International\Geo\Nation	3d98c5e90e13be562fc8ca1af47a266aba95b40c7257413d1bb8eb556573c234.exe

Executes dropped EXE 2 IoCs

pid	Process
1440	kldsompo.exe
4852	kldsompo.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	45	104.21.10.234:22	1440	kldsompo.exe
SSH destination	48	172.67.164.205:22	1440	kldsompo.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
4932	cmd.exe
2948	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	kldsompo.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	kldsompo.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3d98c5e90e13be562fc8ca1af47a266aba95b40c7257413d1bb8eb556573c234.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4720	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
2132	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
5060	3d98c5e90e13be562fc8ca1af47a266aba95b40c7257413d1bb8eb556573c234.exe
5060	3d98c5e90e13be562fc8ca1af47a266aba95b40c7257413d1bb8eb556573c234.exe
5060	3d98c5e90e13be562fc8ca1af47a266aba95b40c7257413d1bb8eb556573c234.exe
5060	3d98c5e90e13be562fc8ca1af47a266aba95b40c7257413d1bb8eb556573c234.exe
5060	3d98c5e90e13be562fc8ca1af47a266aba95b40c7257413d1bb8eb556573c234.exe
5060	3d98c5e90e13be562fc8ca1af47a266aba95b40c7257413d1bb8eb556573c234.exe
5060	3d98c5e90e13be562fc8ca1af47a266aba95b40c7257413d1bb8eb556573c234.exe
5060	3d98c5e90e13be562fc8ca1af47a266aba95b40c7257413d1bb8eb556573c234.exe
5060	3d98c5e90e13be562fc8ca1af47a266aba95b40c7257413d1bb8eb556573c234.exe
5060	3d98c5e90e13be562fc8ca1af47a266aba95b40c7257413d1bb8eb556573c234.exe
5060	3d98c5e90e13be562fc8ca1af47a266aba95b40c7257413d1bb8eb556573c234.exe
5060	3d98c5e90e13be562fc8ca1af47a266aba95b40c7257413d1bb8eb556573c234.exe
5060	3d98c5e90e13be562fc8ca1af47a266aba95b40c7257413d1bb8eb556573c234.exe
5060	3d98c5e90e13be562fc8ca1af47a266aba95b40c7257413d1bb8eb556573c234.exe
5060	3d98c5e90e13be562fc8ca1af47a266aba95b40c7257413d1bb8eb556573c234.exe
5060	3d98c5e90e13be562fc8ca1af47a266aba95b40c7257413d1bb8eb556573c234.exe
5060	3d98c5e90e13be562fc8ca1af47a266aba95b40c7257413d1bb8eb556573c234.exe
5060	3d98c5e90e13be562fc8ca1af47a266aba95b40c7257413d1bb8eb556573c234.exe
5060	3d98c5e90e13be562fc8ca1af47a266aba95b40c7257413d1bb8eb556573c234.exe
5060	3d98c5e90e13be562fc8ca1af47a266aba95b40c7257413d1bb8eb556573c234.exe
5060	3d98c5e90e13be562fc8ca1af47a266aba95b40c7257413d1bb8eb556573c234.exe
5060	3d98c5e90e13be562fc8ca1af47a266aba95b40c7257413d1bb8eb556573c234.exe
5060	3d98c5e90e13be562fc8ca1af47a266aba95b40c7257413d1bb8eb556573c234.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5060	3d98c5e90e13be562fc8ca1af47a266aba95b40c7257413d1bb8eb556573c234.exe
Token: SeDebugPrivilege	1440	kldsompo.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 5060 wrote to memory of 4932	5060	3d98c5e90e13be562fc8ca1af47a266aba95b40c7257413d1bb8eb556573c234.exe	84
PID 5060 wrote to memory of 2948	5060	3d98c5e90e13be562fc8ca1af47a266aba95b40c7257413d1bb8eb556573c234.exe	86
PID 2948 wrote to memory of 4720	2948	cmd.exe	88
PID 4932 wrote to memory of 2132	4932	cmd.exe	89
PID 2948 wrote to memory of 4852	2948	cmd.exe	92

C:\Users\Admin\AppData\Local\Temp\3d98c5e90e13be562fc8ca1af47a266aba95b40c7257413d1bb8eb556573c234.exe
"C:\Users\Admin\AppData\Local\Temp\3d98c5e90e13be562fc8ca1af47a266aba95b40c7257413d1bb8eb556573c234.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5060
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "kldsompo" /tr '"C:\Users\Admin\AppData\Roaming\kldsompo.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4932
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "kldsompo" /tr '"C:\Users\Admin\AppData\Roaming\kldsompo.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2132
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp2A28.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2948
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4720
- - C:\Users\Admin\AppData\Roaming\kldsompo.exe
    "C:\Users\Admin\AppData\Roaming\kldsompo.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4852

C:\Users\Admin\AppData\Roaming\kldsompo.exe
"C:\Users\Admin\AppData\Roaming\kldsompo.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:1440

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

tmp2A28.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp2A28.tmp.bat
Size 152B
SHA256 1093f7a5e7f7bd09cf412ec254c63e6ae51082a277ba68d9fbafba82d4482fe9
MD5 51706f54c98a7c1d35f73fbea2d353b7
SHA1 c3fececfb6beab33366d4a563933e827ccd2749b
SHA512 b193ca8882ed12e9f3f83761775389d429209a8cfee3698f36bf0efab119eee4584c06646ecd80ebb6542761937840a605a7e3340145ecc7f9ec8a535fcee167
TLSH
T15AC02B5372C9EA2E2809281703FADC8E91777D593F40FF10C344C00D1380859F0EA342
MD5 SHA1 SHA512 TLSH

Submit Download

kldsompo.exe

Path C:\Users\Admin\AppData\Roaming\kldsompo.exe
Size 45KB
SHA256 3d98c5e90e13be562fc8ca1af47a266aba95b40c7257413d1bb8eb556573c234
MD5 a81ab9cbd761ae6376f34fc4347f089e
SHA1 74578ecbac8ddaa161e34096aad3ee124a297dd7
SHA512 0962015ad2b255e647b355c003205a551704c519f9b7b277dee0f55d68af1c7e28ba0421b41e16c06872c487754ccb66026b83d73e931648919db9b3df5af87d
SSDEEP 768:vuogpT78XvEsWUOsRzqmo2qrrb3/GYjHuPInzjbtgXKiaQLyf7mQG+BDZkx:vuogpT7I62gL/3n3b6Xz92TmOdkx
TLSH
T12E233B003BE9C127F2BE4FB898F26146467AF6636603D64D2CC452DB5613FC29A426FD
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1440-10-0x0000000004880000-0x0000000004890000-memory.dmp

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memory/1440-13-0x0000000004880000-0x0000000004890000-memory.dmp

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memory/5060-0-0x00000000009C0000-0x00000000009D2000-memory.dmp

Download

memory/5060-1-0x0000000005430000-0x0000000005440000-memory.dmp

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memory/5060-2-0x0000000005370000-0x000000000540C000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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