asyncrat | 87e879e47fe139c39fec1243eb8d7d4461887c2e6618250aa55ed37405dac5fc

General

Target
87e879e47fe139c39fec1243eb8d7d4461887c2e6618250aa55ed37405dac5fc.exe
Size 45KB
Sample260905-ns69matdnb
SHA256 87e879e47fe139c39fec1243eb8d7d4461887c2e6618250aa55ed37405dac5fc
MD5 7f208d3e8de6f14d22fd8f163e78bf04
SHA1 4b6e581bfcbadc11805204fc87372e3ac465fc94
SHA512 d122838825a8980a85736450fe73b2280c2a02aabe07f14bf255e1a845d6a5af77a52e6b4f1b5a932cda81a209d6d96540d6d5f75d028f2701923a2d5b454bd2
SSDEEP 768:EulCJTHESwgWUK3aGmo2q9x/NYssPJZOPIczzjbVgXkiFv1L8V8QQ0Qag9BDZsx:EulCJTHl42eHIf3cz3byXhLL8JQ0bgTc
TLSH
T14B231B0037E8822BF2BE4F749CF26145867AF6673603E58A1CC451DB5613FC69A426FD
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

gainungvn.top:80
gainungvn.top:22
gainungvn.top:8080
gainungvn.top:8880
gainungvn.top:2052
gainungvn.top:2082
gainungvn.top:2086
gainungvn.top:2095
gainungvn.top:443
gainungvn.top:2053
gainungvn.top:2083
gainungvn.top:2087
gainungvn.top:2096
gainungvn.top:8443
www.gainungvn.top:80
www.gainungvn.top:22
www.gainungvn.top:8080
www.gainungvn.top:8880
www.gainungvn.top:2052
www.gainungvn.top:2082
www.gainungvn.top:2086
www.gainungvn.top:2095
www.gainungvn.top:443
www.gainungvn.top:2053
www.gainungvn.top:2083
www.gainungvn.top:2087
www.gainungvn.top:2096
www.gainungvn.top:8443
remcos.gainungvn.top:80
remcos.gainungvn.top:22
remcos.gainungvn.top:8080
remcos.gainungvn.top:8880
remcos.gainungvn.top:2052
remcos.gainungvn.top:2082
remcos.gainungvn.top:2086
remcos.gainungvn.top:2095
remcos.gainungvn.top:443
remcos.gainungvn.top:2053
remcos.gainungvn.top:2083
remcos.gainungvn.top:2087
remcos.gainungvn.top:2096
remcos.gainungvn.top:8443
codered.gainungvn.top:80
codered.gainungvn.top:22
codered.gainungvn.top:8080
codered.gainungvn.top:8880
codered.gainungvn.top:2052
codered.gainungvn.top:2082
codered.gainungvn.top:2086
codered.gainungvn.top:2095
codered.gainungvn.top:443
codered.gainungvn.top:2053
codered.gainungvn.top:2083
codered.gainungvn.top:2087
codered.gainungvn.top:2096
codered.gainungvn.top:8443
trickbot.gainungvn.top:80
trickbot.gainungvn.top:22
trickbot.gainungvn.top:8080
trickbot.gainungvn.top:8880
trickbot.gainungvn.top:2052
trickbot.gainungvn.top:2082
trickbot.gainungvn.top:2086
trickbot.gainungvn.top:2095
trickbot.gainungvn.top:443
trickbot.gainungvn.top:2053
trickbot.gainungvn.top:2083
trickbot.gainungvn.top:2087
trickbot.gainungvn.top:2096
trickbot.gainungvn.top:8443

Mutex

3rBCXdDF9WDF

Attributes

delay
0
install
true
install_file
x099bq.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/0x0002000000022b94-8.dat	family_asyncrat
behavioral1/memory/5684-10-0x00000000051D0000-0x00000000051E0000-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-1-5-21-3053180483-1881419501-3594244048-1000\Control Panel\International\Geo\Nation	87e879e47fe139c39fec1243eb8d7d4461887c2e6618250aa55ed37405dac5fc.exe

Executes dropped EXE 2 IoCs

pid	Process
5684	x099bq.exe
5800	x099bq.exe

Outbound SSH connection to public host 2 TTPs 4 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	20	172.67.222.143:22	5684	x099bq.exe
SSH destination	37	104.21.43.76:22	5684	x099bq.exe
SSH destination	53	172.67.222.143:22	5684	x099bq.exe
SSH destination	58	104.21.43.76:22	5684	x099bq.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
4684	cmd.exe
2812	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	87e879e47fe139c39fec1243eb8d7d4461887c2e6618250aa55ed37405dac5fc.exe
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	x099bq.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	x099bq.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
5508	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
5608	schtasks.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
4356	87e879e47fe139c39fec1243eb8d7d4461887c2e6618250aa55ed37405dac5fc.exe
4356	87e879e47fe139c39fec1243eb8d7d4461887c2e6618250aa55ed37405dac5fc.exe
4356	87e879e47fe139c39fec1243eb8d7d4461887c2e6618250aa55ed37405dac5fc.exe
4356	87e879e47fe139c39fec1243eb8d7d4461887c2e6618250aa55ed37405dac5fc.exe
4356	87e879e47fe139c39fec1243eb8d7d4461887c2e6618250aa55ed37405dac5fc.exe
4356	87e879e47fe139c39fec1243eb8d7d4461887c2e6618250aa55ed37405dac5fc.exe
4356	87e879e47fe139c39fec1243eb8d7d4461887c2e6618250aa55ed37405dac5fc.exe
4356	87e879e47fe139c39fec1243eb8d7d4461887c2e6618250aa55ed37405dac5fc.exe
4356	87e879e47fe139c39fec1243eb8d7d4461887c2e6618250aa55ed37405dac5fc.exe
4356	87e879e47fe139c39fec1243eb8d7d4461887c2e6618250aa55ed37405dac5fc.exe
4356	87e879e47fe139c39fec1243eb8d7d4461887c2e6618250aa55ed37405dac5fc.exe
4356	87e879e47fe139c39fec1243eb8d7d4461887c2e6618250aa55ed37405dac5fc.exe
4356	87e879e47fe139c39fec1243eb8d7d4461887c2e6618250aa55ed37405dac5fc.exe
4356	87e879e47fe139c39fec1243eb8d7d4461887c2e6618250aa55ed37405dac5fc.exe
4356	87e879e47fe139c39fec1243eb8d7d4461887c2e6618250aa55ed37405dac5fc.exe
4356	87e879e47fe139c39fec1243eb8d7d4461887c2e6618250aa55ed37405dac5fc.exe
4356	87e879e47fe139c39fec1243eb8d7d4461887c2e6618250aa55ed37405dac5fc.exe
4356	87e879e47fe139c39fec1243eb8d7d4461887c2e6618250aa55ed37405dac5fc.exe
4356	87e879e47fe139c39fec1243eb8d7d4461887c2e6618250aa55ed37405dac5fc.exe
4356	87e879e47fe139c39fec1243eb8d7d4461887c2e6618250aa55ed37405dac5fc.exe
4356	87e879e47fe139c39fec1243eb8d7d4461887c2e6618250aa55ed37405dac5fc.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4356	87e879e47fe139c39fec1243eb8d7d4461887c2e6618250aa55ed37405dac5fc.exe
Token: SeDebugPrivilege	5684	x099bq.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4356 wrote to memory of 4684	4356	87e879e47fe139c39fec1243eb8d7d4461887c2e6618250aa55ed37405dac5fc.exe	86
PID 4356 wrote to memory of 2812	4356	87e879e47fe139c39fec1243eb8d7d4461887c2e6618250aa55ed37405dac5fc.exe	88
PID 2812 wrote to memory of 5508	2812	cmd.exe	90
PID 4684 wrote to memory of 5608	4684	cmd.exe	91
PID 2812 wrote to memory of 5800	2812	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\87e879e47fe139c39fec1243eb8d7d4461887c2e6618250aa55ed37405dac5fc.exe
"C:\Users\Admin\AppData\Local\Temp\87e879e47fe139c39fec1243eb8d7d4461887c2e6618250aa55ed37405dac5fc.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4356
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "x099bq" /tr '"C:\Users\Admin\AppData\Roaming\x099bq.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4684
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "x099bq" /tr '"C:\Users\Admin\AppData\Roaming\x099bq.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:5608
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp8E12.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2812
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:5508
- - C:\Users\Admin\AppData\Roaming\x099bq.exe
    "C:\Users\Admin\AppData\Roaming\x099bq.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:5800

C:\Users\Admin\AppData\Roaming\x099bq.exe
"C:\Users\Admin\AppData\Roaming\x099bq.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:5684

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

tmp8E12.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp8E12.tmp.bat
Size 150B
SHA256 af238994151230a775b7ea364c697b36ef30cd05311486b4e8ff1944c7beeb92
MD5 971f79eee430e57289aadeb402b9b82a
SHA1 71ecbfc60121a5a4f875158abfdf39c1b0b5bf59
SHA512 6f7754d45d39436815e0a06a25306b536b41d2c039db982510f716ed7fbef339b26d587d4fa45cfb16772e18ba3c2bd141346d1ace508b89f88388262aa04f3d
TLSH
T146C08C9751C5BA4E280994230ABA949D91AB68A93E44AB108304401D1280C58E09A242
MD5 SHA1 SHA512 TLSH

Submit Download

x099bq.exe

Path C:\Users\Admin\AppData\Roaming\x099bq.exe
Size 45KB
SHA256 87e879e47fe139c39fec1243eb8d7d4461887c2e6618250aa55ed37405dac5fc
MD5 7f208d3e8de6f14d22fd8f163e78bf04
SHA1 4b6e581bfcbadc11805204fc87372e3ac465fc94
SHA512 d122838825a8980a85736450fe73b2280c2a02aabe07f14bf255e1a845d6a5af77a52e6b4f1b5a932cda81a209d6d96540d6d5f75d028f2701923a2d5b454bd2
SSDEEP 768:EulCJTHESwgWUK3aGmo2q9x/NYssPJZOPIczzjbVgXkiFv1L8V8QQ0Qag9BDZsx:EulCJTHl42eHIf3cz3byXhLL8JQ0bgTc
TLSH
T14B231B0037E8822BF2BE4F749CF26145867AF6673603E58A1CC451DB5613FC69A426FD
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/4356-0-0x0000000000F80000-0x0000000000F92000-memory.dmp

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memory/4356-1-0x00000000059F0000-0x0000000005A00000-memory.dmp

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memory/4356-2-0x0000000005A00000-0x0000000005A9C000-memory.dmp

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memory/5684-10-0x00000000051D0000-0x00000000051E0000-memory.dmp

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memory/5684-13-0x00000000051D0000-0x00000000051E0000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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