asyncrat | f00d69acd700d5858600014734b3b595b5b1f1c8054ba8e6cf3cdb1986d46087

General

Target
f00d69acd700d5858600014734b3b595b5b1f1c8054ba8e6cf3cdb1986d46087.exe
Size 45KB
Sample260801-qlpgcawfpg
SHA256 f00d69acd700d5858600014734b3b595b5b1f1c8054ba8e6cf3cdb1986d46087
MD5 45a0d3bb5d38f77418263f1f227d150d
SHA1 54a03cfb1c51906c0321f4c1ceb8339bfa98a778
SHA512 805fb9acfe7fe3b926b49dffdac4f04e550294047c728b4e4440ed5102172b06abad1c1a5d08e6d7147105be59c943645c1040ddb62e7f51d8dc9bdf46e80d16
SSDEEP 768:5udApTNctooWUS7C+mo2qtSCSwTMjPIuujbNgX3i+rLnjjwNVnn6JFBDZ0x:5udApTNmU2lg1uCbaXSrn6JLd0x
TLSH
T14C231B003BE8812BF2BE4F7899F26145857AF2673603D54A2CC451DB5723FC69A426FE
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

sextinvl.blog:80
sextinvl.blog:22
sextinvl.blog:8080
sextinvl.blog:8880
sextinvl.blog:2052
sextinvl.blog:2082
sextinvl.blog:2086
sextinvl.blog:2095
sextinvl.blog:443
sextinvl.blog:2053
sextinvl.blog:2083
sextinvl.blog:2087
sextinvl.blog:2096
sextinvl.blog:8443
www.sextinvl.blog:80
www.sextinvl.blog:22
www.sextinvl.blog:8080
www.sextinvl.blog:8880
www.sextinvl.blog:2052
www.sextinvl.blog:2082
www.sextinvl.blog:2086
www.sextinvl.blog:2095
www.sextinvl.blog:443
www.sextinvl.blog:2053
www.sextinvl.blog:2083
www.sextinvl.blog:2087
www.sextinvl.blog:2096
www.sextinvl.blog:8443
blaster.sextinvl.blog:80
blaster.sextinvl.blog:22
blaster.sextinvl.blog:8080
blaster.sextinvl.blog:8880
blaster.sextinvl.blog:2052
blaster.sextinvl.blog:2082
blaster.sextinvl.blog:2086
blaster.sextinvl.blog:2095
blaster.sextinvl.blog:443
blaster.sextinvl.blog:2053
blaster.sextinvl.blog:2083
blaster.sextinvl.blog:2087
blaster.sextinvl.blog:2096
blaster.sextinvl.blog:8443
sobig.sextinvl.blog:80
sobig.sextinvl.blog:22
sobig.sextinvl.blog:8080
sobig.sextinvl.blog:8880
sobig.sextinvl.blog:2052
sobig.sextinvl.blog:2082
sobig.sextinvl.blog:2086
sobig.sextinvl.blog:2095
sobig.sextinvl.blog:443
sobig.sextinvl.blog:2053
sobig.sextinvl.blog:2083
sobig.sextinvl.blog:2087
sobig.sextinvl.blog:2096
sobig.sextinvl.blog:8443

Mutex

A0zuciktZGc8

Attributes

delay
0
install
true
install_file
r4an68.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/0x0009000000024311-8.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-1-5-21-889581200-2041691093-2048517887-1000\Control Panel\International\Geo\Nation	f00d69acd700d5858600014734b3b595b5b1f1c8054ba8e6cf3cdb1986d46087.exe

Executes dropped EXE 2 IoCs

pid	Process
1200	r4an68.exe
5084	r4an68.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	60	172.67.169.65:22	1200	r4an68.exe
SSH destination	45	104.21.27.116:22	1200	r4an68.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
4612	cmd.exe
4000	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	f00d69acd700d5858600014734b3b595b5b1f1c8054ba8e6cf3cdb1986d46087.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	r4an68.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	r4an68.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
1088	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
1800	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
3732	f00d69acd700d5858600014734b3b595b5b1f1c8054ba8e6cf3cdb1986d46087.exe
3732	f00d69acd700d5858600014734b3b595b5b1f1c8054ba8e6cf3cdb1986d46087.exe
3732	f00d69acd700d5858600014734b3b595b5b1f1c8054ba8e6cf3cdb1986d46087.exe
3732	f00d69acd700d5858600014734b3b595b5b1f1c8054ba8e6cf3cdb1986d46087.exe
3732	f00d69acd700d5858600014734b3b595b5b1f1c8054ba8e6cf3cdb1986d46087.exe
3732	f00d69acd700d5858600014734b3b595b5b1f1c8054ba8e6cf3cdb1986d46087.exe
3732	f00d69acd700d5858600014734b3b595b5b1f1c8054ba8e6cf3cdb1986d46087.exe
3732	f00d69acd700d5858600014734b3b595b5b1f1c8054ba8e6cf3cdb1986d46087.exe
3732	f00d69acd700d5858600014734b3b595b5b1f1c8054ba8e6cf3cdb1986d46087.exe
3732	f00d69acd700d5858600014734b3b595b5b1f1c8054ba8e6cf3cdb1986d46087.exe
3732	f00d69acd700d5858600014734b3b595b5b1f1c8054ba8e6cf3cdb1986d46087.exe
3732	f00d69acd700d5858600014734b3b595b5b1f1c8054ba8e6cf3cdb1986d46087.exe
3732	f00d69acd700d5858600014734b3b595b5b1f1c8054ba8e6cf3cdb1986d46087.exe
3732	f00d69acd700d5858600014734b3b595b5b1f1c8054ba8e6cf3cdb1986d46087.exe
3732	f00d69acd700d5858600014734b3b595b5b1f1c8054ba8e6cf3cdb1986d46087.exe
3732	f00d69acd700d5858600014734b3b595b5b1f1c8054ba8e6cf3cdb1986d46087.exe
3732	f00d69acd700d5858600014734b3b595b5b1f1c8054ba8e6cf3cdb1986d46087.exe
3732	f00d69acd700d5858600014734b3b595b5b1f1c8054ba8e6cf3cdb1986d46087.exe
3732	f00d69acd700d5858600014734b3b595b5b1f1c8054ba8e6cf3cdb1986d46087.exe
3732	f00d69acd700d5858600014734b3b595b5b1f1c8054ba8e6cf3cdb1986d46087.exe
3732	f00d69acd700d5858600014734b3b595b5b1f1c8054ba8e6cf3cdb1986d46087.exe
3732	f00d69acd700d5858600014734b3b595b5b1f1c8054ba8e6cf3cdb1986d46087.exe
3732	f00d69acd700d5858600014734b3b595b5b1f1c8054ba8e6cf3cdb1986d46087.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3732	f00d69acd700d5858600014734b3b595b5b1f1c8054ba8e6cf3cdb1986d46087.exe
Token: SeDebugPrivilege	1200	r4an68.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3732 wrote to memory of 4612	3732	f00d69acd700d5858600014734b3b595b5b1f1c8054ba8e6cf3cdb1986d46087.exe	85
PID 3732 wrote to memory of 4000	3732	f00d69acd700d5858600014734b3b595b5b1f1c8054ba8e6cf3cdb1986d46087.exe	87
PID 4000 wrote to memory of 1088	4000	cmd.exe	89
PID 4612 wrote to memory of 1800	4612	cmd.exe	90
PID 4000 wrote to memory of 5084	4000	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\f00d69acd700d5858600014734b3b595b5b1f1c8054ba8e6cf3cdb1986d46087.exe
"C:\Users\Admin\AppData\Local\Temp\f00d69acd700d5858600014734b3b595b5b1f1c8054ba8e6cf3cdb1986d46087.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3732
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "r4an68" /tr '"C:\Users\Admin\AppData\Roaming\r4an68.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4612
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "r4an68" /tr '"C:\Users\Admin\AppData\Roaming\r4an68.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1800
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpA553.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4000
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1088
- - C:\Users\Admin\AppData\Roaming\r4an68.exe
    "C:\Users\Admin\AppData\Roaming\r4an68.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:5084

C:\Users\Admin\AppData\Roaming\r4an68.exe
"C:\Users\Admin\AppData\Roaming\r4an68.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:1200

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

tmpA553.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpA553.tmp.bat
Size 150B
SHA256 b7f43c549594f054bbb17fd10eb8ab6c40b1164103620e70035563324ff30acf
MD5 fce175adeaf6d762ec5cd09844bc713b
SHA1 796eff08cfa5338093d35860d0a66bf1a9cc15c4
SHA512 7fc89ed6c7c618f75cb427ee49a4a7a6c5f4f962ca94b22341544ec0f225821221f8695925376919304dac3f1ceb97df99adcc3ad9f60c1cd070e301bc51d215
TLSH
T1F9C02B43E5C5EE0EA806742303FAD49D91727D993F80FF00D308C40E628086CF1D9341
MD5 SHA1 SHA512 TLSH

Submit Download

r4an68.exe

Path C:\Users\Admin\AppData\Roaming\r4an68.exe
Size 45KB
SHA256 f00d69acd700d5858600014734b3b595b5b1f1c8054ba8e6cf3cdb1986d46087
MD5 45a0d3bb5d38f77418263f1f227d150d
SHA1 54a03cfb1c51906c0321f4c1ceb8339bfa98a778
SHA512 805fb9acfe7fe3b926b49dffdac4f04e550294047c728b4e4440ed5102172b06abad1c1a5d08e6d7147105be59c943645c1040ddb62e7f51d8dc9bdf46e80d16
SSDEEP 768:5udApTNctooWUS7C+mo2qtSCSwTMjPIuujbNgX3i+rLnjjwNVnn6JFBDZ0x:5udApTNmU2lg1uCbaXSrn6JLd0x
TLSH
T14C231B003BE8812BF2BE4F7899F26145857AF2673603D54A2CC451DB5723FC69A426FE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1200-10-0x0000000004920000-0x0000000004930000-memory.dmp

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memory/1200-13-0x0000000004920000-0x0000000004930000-memory.dmp

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memory/3732-0-0x0000000000340000-0x0000000000352000-memory.dmp

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memory/3732-1-0x0000000004DF0000-0x0000000004E00000-memory.dmp

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memory/3732-2-0x0000000004D00000-0x0000000004D9C000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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