asyncrat | 23209ca3c577e560f470a09644218c9eabd9b5925565acf3ba734afeab546db2

General

Target
23209ca3c577e560f470a09644218c9eabd9b5925565acf3ba734afeab546db2.exe
Size 45KB
Sample260831-svsapscl2v
SHA256 23209ca3c577e560f470a09644218c9eabd9b5925565acf3ba734afeab546db2
MD5 4a226f503dd1a03e806f184ff244e30d
SHA1 010f5fde83f3d5b354b50312a8e34bd224b2a72a
SHA512 704d5f13db5076570d7d53fe0fd88a827cca37c2a7d43a19152051a2b857bb66121d4513a7c4ed01822a643f3fe39da050485f344892c5c67ac431c496b88885
SSDEEP 768:RuxkJTVmU5EkWUGMKSmo2q10Bz5U4x7PIgSjbbgX3iEOshmMV/BDZcx:RuxkJTgip2Jj6g+bkXSE8MXdcx
TLSH
T1F8231C103BE88237F2BE4BB858F26145867BF6633603D54D6CC4529B5623FC68A426FD
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

gaiviet69.com:80
gaiviet69.com:22
gaiviet69.com:8080
gaiviet69.com:8880
gaiviet69.com:2052
gaiviet69.com:2082
gaiviet69.com:2086
gaiviet69.com:2095
gaiviet69.com:443
gaiviet69.com:2053
gaiviet69.com:2083
gaiviet69.com:2087
gaiviet69.com:2096
gaiviet69.com:8443
www.gaiviet69.com:80
www.gaiviet69.com:22
www.gaiviet69.com:8080
www.gaiviet69.com:8880
www.gaiviet69.com:2052
www.gaiviet69.com:2082
www.gaiviet69.com:2086
www.gaiviet69.com:2095
www.gaiviet69.com:443
www.gaiviet69.com:2053
www.gaiviet69.com:2083
www.gaiviet69.com:2087
www.gaiviet69.com:2096
www.gaiviet69.com:8443
qbot.gaiviet69.com:80
qbot.gaiviet69.com:22
qbot.gaiviet69.com:8080
qbot.gaiviet69.com:8880
qbot.gaiviet69.com:2052
qbot.gaiviet69.com:2082
qbot.gaiviet69.com:2086
qbot.gaiviet69.com:2095
qbot.gaiviet69.com:443
qbot.gaiviet69.com:2053
qbot.gaiviet69.com:2083
qbot.gaiviet69.com:2087
qbot.gaiviet69.com:2096
qbot.gaiviet69.com:8443
gootloader.gaiviet69.com:80
gootloader.gaiviet69.com:22
gootloader.gaiviet69.com:8080
gootloader.gaiviet69.com:8880
gootloader.gaiviet69.com:2052
gootloader.gaiviet69.com:2082
gootloader.gaiviet69.com:2086
gootloader.gaiviet69.com:2095
gootloader.gaiviet69.com:443
gootloader.gaiviet69.com:2053
gootloader.gaiviet69.com:2083
gootloader.gaiviet69.com:2087
gootloader.gaiviet69.com:2096
gootloader.gaiviet69.com:8443

Mutex

6aqMpQ0wIxaW

Attributes

delay
0
install
true
install_file
i9kutwfd.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
behavioral1/files/0x000800000002453d-8.dat	family_asyncrat
behavioral1/memory/2852-10-0x00000000053D0000-0x00000000053E0000-memory.dmp	family_asyncrat
behavioral1/memory/2852-13-0x00000000053D0000-0x00000000053E0000-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-1-5-21-540052884-2969440504-464782435-1000\Control Panel\International\Geo\Nation	23209ca3c577e560f470a09644218c9eabd9b5925565acf3ba734afeab546db2.exe

Executes dropped EXE 2 IoCs

pid	Process
2852	i9kutwfd.exe
784	i9kutwfd.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	36	172.67.177.137:22	2852	i9kutwfd.exe
SSH destination	49	104.21.72.80:22	2852	i9kutwfd.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
4492	cmd.exe
1856	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	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	i9kutwfd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	i9kutwfd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	23209ca3c577e560f470a09644218c9eabd9b5925565acf3ba734afeab546db2.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3428	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
1436	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
716	23209ca3c577e560f470a09644218c9eabd9b5925565acf3ba734afeab546db2.exe
716	23209ca3c577e560f470a09644218c9eabd9b5925565acf3ba734afeab546db2.exe
716	23209ca3c577e560f470a09644218c9eabd9b5925565acf3ba734afeab546db2.exe
716	23209ca3c577e560f470a09644218c9eabd9b5925565acf3ba734afeab546db2.exe
716	23209ca3c577e560f470a09644218c9eabd9b5925565acf3ba734afeab546db2.exe
716	23209ca3c577e560f470a09644218c9eabd9b5925565acf3ba734afeab546db2.exe
716	23209ca3c577e560f470a09644218c9eabd9b5925565acf3ba734afeab546db2.exe
716	23209ca3c577e560f470a09644218c9eabd9b5925565acf3ba734afeab546db2.exe
716	23209ca3c577e560f470a09644218c9eabd9b5925565acf3ba734afeab546db2.exe
716	23209ca3c577e560f470a09644218c9eabd9b5925565acf3ba734afeab546db2.exe
716	23209ca3c577e560f470a09644218c9eabd9b5925565acf3ba734afeab546db2.exe
716	23209ca3c577e560f470a09644218c9eabd9b5925565acf3ba734afeab546db2.exe
716	23209ca3c577e560f470a09644218c9eabd9b5925565acf3ba734afeab546db2.exe
716	23209ca3c577e560f470a09644218c9eabd9b5925565acf3ba734afeab546db2.exe
716	23209ca3c577e560f470a09644218c9eabd9b5925565acf3ba734afeab546db2.exe
716	23209ca3c577e560f470a09644218c9eabd9b5925565acf3ba734afeab546db2.exe
716	23209ca3c577e560f470a09644218c9eabd9b5925565acf3ba734afeab546db2.exe
716	23209ca3c577e560f470a09644218c9eabd9b5925565acf3ba734afeab546db2.exe
716	23209ca3c577e560f470a09644218c9eabd9b5925565acf3ba734afeab546db2.exe
716	23209ca3c577e560f470a09644218c9eabd9b5925565acf3ba734afeab546db2.exe
716	23209ca3c577e560f470a09644218c9eabd9b5925565acf3ba734afeab546db2.exe
716	23209ca3c577e560f470a09644218c9eabd9b5925565acf3ba734afeab546db2.exe
716	23209ca3c577e560f470a09644218c9eabd9b5925565acf3ba734afeab546db2.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	716	23209ca3c577e560f470a09644218c9eabd9b5925565acf3ba734afeab546db2.exe
Token: SeDebugPrivilege	2852	i9kutwfd.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 716 wrote to memory of 4492	716	23209ca3c577e560f470a09644218c9eabd9b5925565acf3ba734afeab546db2.exe	85
PID 716 wrote to memory of 1856	716	23209ca3c577e560f470a09644218c9eabd9b5925565acf3ba734afeab546db2.exe	87
PID 1856 wrote to memory of 3428	1856	cmd.exe	89
PID 4492 wrote to memory of 1436	4492	cmd.exe	90
PID 1856 wrote to memory of 784	1856	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\23209ca3c577e560f470a09644218c9eabd9b5925565acf3ba734afeab546db2.exe
"C:\Users\Admin\AppData\Local\Temp\23209ca3c577e560f470a09644218c9eabd9b5925565acf3ba734afeab546db2.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:716
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "i9kutwfd" /tr '"C:\Users\Admin\AppData\Roaming\i9kutwfd.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4492
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "i9kutwfd" /tr '"C:\Users\Admin\AppData\Roaming\i9kutwfd.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1436
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpF608.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1856
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3428
- - C:\Users\Admin\AppData\Roaming\i9kutwfd.exe
    "C:\Users\Admin\AppData\Roaming\i9kutwfd.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:784

C:\Users\Admin\AppData\Roaming\i9kutwfd.exe
"C:\Users\Admin\AppData\Roaming\i9kutwfd.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2852

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

tmpF608.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpF608.tmp.bat
Size 152B
SHA256 f5a0297d9be25546c9d15d86a4c77a2c5b1f13ab16dc05c10b1297022ce5380f
MD5 82316e6d8dc73a4510c45ee9e02b175a
SHA1 57f422773a404feaa57e2c657f7d7c8c3b9bbe6a
SHA512 a7c3002ece84d3e4f2433b2a5c825ec31f90fce268f16cdbbf64bf16a87de4d66eaee031147270b6b125cdc65fedb569db99cadb107ab8a889faa4db9a6a8c2f
TLSH
T13FC02B4252C5FB1E3909983322FAD48D91B67C993F80BB90D348440D1680488F0D9341
MD5 SHA1 SHA512 TLSH

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i9kutwfd.exe

Path C:\Users\Admin\AppData\Roaming\i9kutwfd.exe
Size 45KB
SHA256 23209ca3c577e560f470a09644218c9eabd9b5925565acf3ba734afeab546db2
MD5 4a226f503dd1a03e806f184ff244e30d
SHA1 010f5fde83f3d5b354b50312a8e34bd224b2a72a
SHA512 704d5f13db5076570d7d53fe0fd88a827cca37c2a7d43a19152051a2b857bb66121d4513a7c4ed01822a643f3fe39da050485f344892c5c67ac431c496b88885
SSDEEP 768:RuxkJTVmU5EkWUGMKSmo2q10Bz5U4x7PIgSjbbgX3iEOshmMV/BDZcx:RuxkJTgip2Jj6g+bkXSE8MXdcx
TLSH
T1F8231C103BE88237F2BE4BB858F26145867BF6633603D54D6CC4529B5623FC68A426FD
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/716-0-0x0000000000280000-0x0000000000292000-memory.dmp

Download

memory/716-1-0x0000000004E10000-0x0000000004E20000-memory.dmp

Download

memory/716-2-0x0000000004C40000-0x0000000004CDC000-memory.dmp

Download

memory/2852-10-0x00000000053D0000-0x00000000053E0000-memory.dmp

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memory/2852-13-0x00000000053D0000-0x00000000053E0000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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