asyncrat | 48b780886f48f7b6e91adf1b9e8017f9a1d0433cf5e233b42469bd8cd4f15e87

General

Target
48b780886f48f7b6e91adf1b9e8017f9a1d0433cf5e233b42469bd8cd4f15e87.exe
Size 45KB
Sample260919-tmlzdsshrb
SHA256 48b780886f48f7b6e91adf1b9e8017f9a1d0433cf5e233b42469bd8cd4f15e87
MD5 72ed04f802ad2d0eee88db4a506380ae
SHA1 2460547613f0ceb03eeb0a17c9bd078e13fd147d
SHA512 c0fb6eb6cef2b5ec2700581d56e15d3ef53cc7af3dacb998d8df37ada2dfbbe5d2a6fad4fd8fa81d0f5f9e28ec45d9bf41d005aa58420c1276fba28e25bf1172
SSDEEP 768:0u1YJTHwAUgQWUaT2Wmo2q9qCXtTtoPIyzjbEgX3igc7PmPNBOBDZ8x:0u1YJTHcw21w3y3bLXS3+1BAd8x
TLSH
T176232A0037D8822BF2BE4F78A9F25145867AF5672603D54E2CC441DB5623FC6DA426FE
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

vnsextop1.com:80
vnsextop1.com:22
vnsextop1.com:8080
vnsextop1.com:8880
vnsextop1.com:2052
vnsextop1.com:2082
vnsextop1.com:2086
vnsextop1.com:2095
vnsextop1.com:443
vnsextop1.com:2053
vnsextop1.com:2083
vnsextop1.com:2087
vnsextop1.com:2096
vnsextop1.com:8443
www.vnsextop1.com:80
www.vnsextop1.com:22
www.vnsextop1.com:8080
www.vnsextop1.com:8880
www.vnsextop1.com:2052
www.vnsextop1.com:2082
www.vnsextop1.com:2086
www.vnsextop1.com:2095
www.vnsextop1.com:443
www.vnsextop1.com:2053
www.vnsextop1.com:2083
www.vnsextop1.com:2087
www.vnsextop1.com:2096
www.vnsextop1.com:8443
trickbot.vnsextop1.com:80
trickbot.vnsextop1.com:22
trickbot.vnsextop1.com:8080
trickbot.vnsextop1.com:8880
trickbot.vnsextop1.com:2052
trickbot.vnsextop1.com:2082
trickbot.vnsextop1.com:2086
trickbot.vnsextop1.com:2095
trickbot.vnsextop1.com:443
trickbot.vnsextop1.com:2053
trickbot.vnsextop1.com:2083
trickbot.vnsextop1.com:2087
trickbot.vnsextop1.com:2096
trickbot.vnsextop1.com:8443
hermeticwiper.vnsextop1.com:80
hermeticwiper.vnsextop1.com:22
hermeticwiper.vnsextop1.com:8080
hermeticwiper.vnsextop1.com:8880
hermeticwiper.vnsextop1.com:2052
hermeticwiper.vnsextop1.com:2082
hermeticwiper.vnsextop1.com:2086
hermeticwiper.vnsextop1.com:2095
hermeticwiper.vnsextop1.com:443
hermeticwiper.vnsextop1.com:2053
hermeticwiper.vnsextop1.com:2083
hermeticwiper.vnsextop1.com:2087
hermeticwiper.vnsextop1.com:2096
hermeticwiper.vnsextop1.com:8443

Mutex

J1SzehT5ep1X

Attributes

delay
0
install
true
install_file
8qv1r0.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/0x000600000001686d-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-1-5-21-2101206053-1414382737-268919432-1000\Control Panel\International\Geo\Nation	48b780886f48f7b6e91adf1b9e8017f9a1d0433cf5e233b42469bd8cd4f15e87.exe

Executes dropped EXE 2 IoCs

pid	Process
3660	8qv1r0.exe
736	8qv1r0.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	31	104.18.31.167:22	3660	8qv1r0.exe
SSH destination	90	104.18.30.167:22	3660	8qv1r0.exe
SSH destination	92	104.18.31.167:22	3660	8qv1r0.exe
SSH destination	19	104.18.30.167:22	3660	8qv1r0.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
776	cmd.exe
4048	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	8qv1r0.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	48b780886f48f7b6e91adf1b9e8017f9a1d0433cf5e233b42469bd8cd4f15e87.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	8qv1r0.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3472	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
4784	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
3808	48b780886f48f7b6e91adf1b9e8017f9a1d0433cf5e233b42469bd8cd4f15e87.exe
3808	48b780886f48f7b6e91adf1b9e8017f9a1d0433cf5e233b42469bd8cd4f15e87.exe
3808	48b780886f48f7b6e91adf1b9e8017f9a1d0433cf5e233b42469bd8cd4f15e87.exe
3808	48b780886f48f7b6e91adf1b9e8017f9a1d0433cf5e233b42469bd8cd4f15e87.exe
3808	48b780886f48f7b6e91adf1b9e8017f9a1d0433cf5e233b42469bd8cd4f15e87.exe
3808	48b780886f48f7b6e91adf1b9e8017f9a1d0433cf5e233b42469bd8cd4f15e87.exe
3808	48b780886f48f7b6e91adf1b9e8017f9a1d0433cf5e233b42469bd8cd4f15e87.exe
3808	48b780886f48f7b6e91adf1b9e8017f9a1d0433cf5e233b42469bd8cd4f15e87.exe
3808	48b780886f48f7b6e91adf1b9e8017f9a1d0433cf5e233b42469bd8cd4f15e87.exe
3808	48b780886f48f7b6e91adf1b9e8017f9a1d0433cf5e233b42469bd8cd4f15e87.exe
3808	48b780886f48f7b6e91adf1b9e8017f9a1d0433cf5e233b42469bd8cd4f15e87.exe
3808	48b780886f48f7b6e91adf1b9e8017f9a1d0433cf5e233b42469bd8cd4f15e87.exe
3808	48b780886f48f7b6e91adf1b9e8017f9a1d0433cf5e233b42469bd8cd4f15e87.exe
3808	48b780886f48f7b6e91adf1b9e8017f9a1d0433cf5e233b42469bd8cd4f15e87.exe
3808	48b780886f48f7b6e91adf1b9e8017f9a1d0433cf5e233b42469bd8cd4f15e87.exe
3808	48b780886f48f7b6e91adf1b9e8017f9a1d0433cf5e233b42469bd8cd4f15e87.exe
3808	48b780886f48f7b6e91adf1b9e8017f9a1d0433cf5e233b42469bd8cd4f15e87.exe
3808	48b780886f48f7b6e91adf1b9e8017f9a1d0433cf5e233b42469bd8cd4f15e87.exe
3808	48b780886f48f7b6e91adf1b9e8017f9a1d0433cf5e233b42469bd8cd4f15e87.exe
3808	48b780886f48f7b6e91adf1b9e8017f9a1d0433cf5e233b42469bd8cd4f15e87.exe
3808	48b780886f48f7b6e91adf1b9e8017f9a1d0433cf5e233b42469bd8cd4f15e87.exe
3808	48b780886f48f7b6e91adf1b9e8017f9a1d0433cf5e233b42469bd8cd4f15e87.exe
3808	48b780886f48f7b6e91adf1b9e8017f9a1d0433cf5e233b42469bd8cd4f15e87.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3808	48b780886f48f7b6e91adf1b9e8017f9a1d0433cf5e233b42469bd8cd4f15e87.exe
Token: SeDebugPrivilege	3660	8qv1r0.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3808 wrote to memory of 776	3808	48b780886f48f7b6e91adf1b9e8017f9a1d0433cf5e233b42469bd8cd4f15e87.exe	88
PID 3808 wrote to memory of 4048	3808	48b780886f48f7b6e91adf1b9e8017f9a1d0433cf5e233b42469bd8cd4f15e87.exe	90
PID 4048 wrote to memory of 3472	4048	cmd.exe	92
PID 776 wrote to memory of 4784	776	cmd.exe	93
PID 4048 wrote to memory of 736	4048	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\48b780886f48f7b6e91adf1b9e8017f9a1d0433cf5e233b42469bd8cd4f15e87.exe
"C:\Users\Admin\AppData\Local\Temp\48b780886f48f7b6e91adf1b9e8017f9a1d0433cf5e233b42469bd8cd4f15e87.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3808
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "8qv1r0" /tr '"C:\Users\Admin\AppData\Roaming\8qv1r0.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:776
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "8qv1r0" /tr '"C:\Users\Admin\AppData\Roaming\8qv1r0.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4784
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp43C.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4048
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3472
- - C:\Users\Admin\AppData\Roaming\8qv1r0.exe
    "C:\Users\Admin\AppData\Roaming\8qv1r0.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:736

C:\Users\Admin\AppData\Roaming\8qv1r0.exe
"C:\Users\Admin\AppData\Roaming\8qv1r0.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:3660

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

tmp43C.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp43C.tmp.bat
Size 149B
SHA256 241a2c1d871c47578326085b85881f0e561407c7b1e0086ed81b6d3dbb63426d
MD5 c8c00f9a8e105f042fe03efde4acfff4
SHA1 ded850e5adad8274feb9f7cddb2457ec71524476
SHA512 1a9fae5a65a023fefd7f2da07ecd857985acc276f69ef81474794e41c6af49391afaef2e7b319335aa84fc15e0054489ff1898ba52014b6ebd77a13f88e63982
TLSH
T170C08C8252C6EA0E6805282702BA948D9162A92A3E40AB00830484496280848E099242
MD5 SHA1 SHA512 TLSH

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8qv1r0.exe

Path C:\Users\Admin\AppData\Roaming\8qv1r0.exe
Size 45KB
SHA256 48b780886f48f7b6e91adf1b9e8017f9a1d0433cf5e233b42469bd8cd4f15e87
MD5 72ed04f802ad2d0eee88db4a506380ae
SHA1 2460547613f0ceb03eeb0a17c9bd078e13fd147d
SHA512 c0fb6eb6cef2b5ec2700581d56e15d3ef53cc7af3dacb998d8df37ada2dfbbe5d2a6fad4fd8fa81d0f5f9e28ec45d9bf41d005aa58420c1276fba28e25bf1172
SSDEEP 768:0u1YJTHwAUgQWUaT2Wmo2q9qCXtTtoPIyzjbEgX3igc7PmPNBOBDZ8x:0u1YJTHcw21w3y3bLXS3+1BAd8x
TLSH
T176232A0037D8822BF2BE4F78A9F25145867AF5672603D54E2CC441DB5623FC6DA426FE
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/3660-10-0x00000000056C0000-0x00000000056D0000-memory.dmp

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memory/3660-13-0x00000000056C0000-0x00000000056D0000-memory.dmp

Download

memory/3808-0-0x0000000000D90000-0x0000000000DA2000-memory.dmp

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memory/3808-1-0x00000000057B0000-0x00000000057C0000-memory.dmp

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memory/3808-2-0x00000000057C0000-0x000000000585C000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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