asyncrat | 4b40aa5ec69de859ee3402eefb0c801a6ae9fe256c0fb824becee7db33377f6f

General

Target
c168gg.net.exe
Size 56KB
Sample261102-l4azfssvft
SHA256 4b40aa5ec69de859ee3402eefb0c801a6ae9fe256c0fb824becee7db33377f6f
MD5 81ae4e26b35152c4bca33120b1ea3cef
SHA1 ae3cbaaeb89b294219ba6cbc4ff0d4dd077e039d
SHA512 f19eeb69eba97f2c4d0fd28bbd253380e053927849751f4c8dcad4e185ce5dc2fcd66a025f15f5558d78ba427de5c5ff8b554c521fe2ef22e6f88f6986605220
SSDEEP 1536:O3/eZv2b8DG/C3Znkr3buXSukVmVS3kejNUHLi/:y/akr3bu7kVmUkINX/
TLSH
T119434B003BE9912BF27E4B78A9F221444779F2637603E99D2CC051DB5A13FC5DA426ED
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

c168gg.net:443
c168gg.net:8848
c168gg.net:8080

Mutex

tnItZRPvsahz

Attributes

delay
3
install
true
install_file
googlecloud.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/0x000700000002451e-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-1-5-21-524788801-3318743092-4051225893-1000\Control Panel\International\Geo\Nation	c168gg.net.exe

Executes dropped EXE 2 IoCs

pid	Process
3160	googlecloud.exe
848	googlecloud.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
2916	cmd.exe
2444	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	googlecloud.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	googlecloud.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	googlecloud.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c168gg.net.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	googlecloud.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4012	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
5036	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
3336	c168gg.net.exe
3336	c168gg.net.exe
3336	c168gg.net.exe
3336	c168gg.net.exe
3336	c168gg.net.exe
3336	c168gg.net.exe
3336	c168gg.net.exe
3336	c168gg.net.exe
3336	c168gg.net.exe
3336	c168gg.net.exe
3336	c168gg.net.exe
3336	c168gg.net.exe
3336	c168gg.net.exe
3336	c168gg.net.exe
3336	c168gg.net.exe
3336	c168gg.net.exe
3336	c168gg.net.exe
3336	c168gg.net.exe
3336	c168gg.net.exe
3336	c168gg.net.exe
3336	c168gg.net.exe
3336	c168gg.net.exe
3336	c168gg.net.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3336	c168gg.net.exe
Token: SeDebugPrivilege	3160	googlecloud.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3336 wrote to memory of 2916	3336	c168gg.net.exe	90
PID 3336 wrote to memory of 2444	3336	c168gg.net.exe	92
PID 2444 wrote to memory of 4012	2444	cmd.exe	94
PID 2916 wrote to memory of 5036	2916	cmd.exe	95
PID 2444 wrote to memory of 848	2444	cmd.exe	99

C:\Users\Admin\AppData\Local\Temp\c168gg.net.exe
"C:\Users\Admin\AppData\Local\Temp\c168gg.net.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3336
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "googlecloud" /tr '"C:\Users\Admin\AppData\Roaming\googlecloud.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2916
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "googlecloud" /tr '"C:\Users\Admin\AppData\Roaming\googlecloud.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:5036
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp80B4.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2444
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4012
- - C:\Users\Admin\AppData\Roaming\googlecloud.exe
    "C:\Users\Admin\AppData\Roaming\googlecloud.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:848

C:\Users\Admin\AppData\Roaming\googlecloud.exe
"C:\Users\Admin\AppData\Roaming\googlecloud.exe"
1⤵
- Executes dropped EXE
- Reads the TCP/IP host and domain name from the registry
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:3160

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

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

tmp80B4.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp80B4.tmp.bat
Size 155B
SHA256 3609cff48d27df749693dc3dae871af9a99cab21319451d0d857e5e330c921f4
MD5 fc5d3c00e2ec8e7e676d6fc06964cec7
SHA1 f1dbd438d0b4190d2b2d0976058e96f84a62fc98
SHA512 c408c618fc6167a6f7de161186eed7d978c9acdebcd12b7a68a95b8e9c3489ca1e456a61d102041ed0eb14d0dae7e1bcc6869185913eacdb28a5d8f83b60c0e0
TLSH
T188C08C8261C9EB4E290998A303BA958C92726C1E3E42BB108345400A528048AF099385
MD5 SHA1 SHA512 TLSH

Submit Download

googlecloud.exe

Path C:\Users\Admin\AppData\Roaming\googlecloud.exe
Size 56KB
SHA256 4b40aa5ec69de859ee3402eefb0c801a6ae9fe256c0fb824becee7db33377f6f
MD5 81ae4e26b35152c4bca33120b1ea3cef
SHA1 ae3cbaaeb89b294219ba6cbc4ff0d4dd077e039d
SHA512 f19eeb69eba97f2c4d0fd28bbd253380e053927849751f4c8dcad4e185ce5dc2fcd66a025f15f5558d78ba427de5c5ff8b554c521fe2ef22e6f88f6986605220
SSDEEP 1536:O3/eZv2b8DG/C3Znkr3buXSukVmVS3kejNUHLi/:y/akr3bu7kVmUkINX/
TLSH
T119434B003BE9912BF27E4B78A9F221444779F2637603E99D2CC051DB5A13FC5DA426ED
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3336-0-0x0000000000800000-0x0000000000814000-memory.dmp

Download

memory/3336-1-0x0000000005130000-0x0000000005140000-memory.dmp

Download

memory/3336-2-0x00000000051E0000-0x000000000527C000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads