asyncrat | 4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881

General

Target
4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe
Size 45KB
Sample260715-y5d4qag151
SHA256 4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881
MD5 4c6bc580828ff5d0f9aa555f2b30fccb
SHA1 aa6ef4cc3f453d9743d507658239d7f7532aa3be
SHA512 1211fd04a2ade795116b4573440bdf78db40007c0153bec62b5c35b1f6b3ea72733d2bf38714007903a1613da1c5d685d8dd3c53bc3c59b61fe74a8e2a3ca716
SSDEEP 768:UuKWgSJTwU6NkWUGnaSmo2qAmmaPol53APIkzjbHgX3iej8zx6cXTEWBDZcx:UuKWgSJTwRf2Wfob3lk3bAXSeSYcXI4s
TLSH
T1AB2329003BE8813BF2BE5F7899F22145867EF6636603D64A1CC441DB5613FC29A426FE
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

vuasexviet.com:80
vuasexviet.com:22
vuasexviet.com:8080
vuasexviet.com:8880
vuasexviet.com:2052
vuasexviet.com:2082
vuasexviet.com:2086
vuasexviet.com:2095
vuasexviet.com:443
vuasexviet.com:2053
vuasexviet.com:2083
vuasexviet.com:2087
vuasexviet.com:2096
vuasexviet.com:8443
www.vuasexviet.com:80
www.vuasexviet.com:22
www.vuasexviet.com:8080
www.vuasexviet.com:8880
www.vuasexviet.com:2052
www.vuasexviet.com:2082
www.vuasexviet.com:2086
www.vuasexviet.com:2095
www.vuasexviet.com:443
www.vuasexviet.com:2053
www.vuasexviet.com:2083
www.vuasexviet.com:2087
www.vuasexviet.com:2096
www.vuasexviet.com:8443
malware.vuasexviet.com:80
malware.vuasexviet.com:22
malware.vuasexviet.com:8080
malware.vuasexviet.com:8880
malware.vuasexviet.com:2052
malware.vuasexviet.com:2082
malware.vuasexviet.com:2086
malware.vuasexviet.com:2095
malware.vuasexviet.com:443
malware.vuasexviet.com:2053
malware.vuasexviet.com:2083
malware.vuasexviet.com:2087
malware.vuasexviet.com:2096
malware.vuasexviet.com:8443
invasive.vuasexviet.com:80
invasive.vuasexviet.com:22
invasive.vuasexviet.com:8080
invasive.vuasexviet.com:8880
invasive.vuasexviet.com:2052
invasive.vuasexviet.com:2082
invasive.vuasexviet.com:2086
invasive.vuasexviet.com:2095
invasive.vuasexviet.com:443
invasive.vuasexviet.com:2053
invasive.vuasexviet.com:2083
invasive.vuasexviet.com:2087
invasive.vuasexviet.com:2096
invasive.vuasexviet.com:8443
lokibot.vuasexviet.com:80
lokibot.vuasexviet.com:22
lokibot.vuasexviet.com:8080
lokibot.vuasexviet.com:8880
lokibot.vuasexviet.com:2052
lokibot.vuasexviet.com:2082
lokibot.vuasexviet.com:2086
lokibot.vuasexviet.com:2095
lokibot.vuasexviet.com:443
lokibot.vuasexviet.com:2053
lokibot.vuasexviet.com:2083
lokibot.vuasexviet.com:2087
lokibot.vuasexviet.com:2096
lokibot.vuasexviet.com:8443
gozi.vuasexviet.com:80
gozi.vuasexviet.com:22
gozi.vuasexviet.com:8080
gozi.vuasexviet.com:8880
gozi.vuasexviet.com:2052
gozi.vuasexviet.com:2082
gozi.vuasexviet.com:2086
gozi.vuasexviet.com:2095
gozi.vuasexviet.com:443
gozi.vuasexviet.com:2053
gozi.vuasexviet.com:2083
gozi.vuasexviet.com:2087
gozi.vuasexviet.com:2096
gozi.vuasexviet.com:8443

Mutex

A91H3cPBfCnt

Attributes

delay
0
install
true
install_file
tvq0y9lx.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
behavioral2/files/0x0005000000016b3d-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
1960	tvq0y9lx.exe
1664	tvq0y9lx.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tvq0y9lx.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tvq0y9lx.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.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

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
6048	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
4912	schtasks.exe

Suspicious behavior: EnumeratesProcesses 29 IoCs

pid	Process
5232	4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe
5232	4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe
5232	4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe
5232	4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe
5232	4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe
5232	4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe
5232	4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe
5232	4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe
5232	4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe
5232	4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe
5232	4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe
5232	4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe
5232	4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe
5232	4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe
5232	4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe
5232	4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe
5232	4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe
5232	4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe
5232	4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe
5232	4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe
5232	4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe
5232	4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe
5232	4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe
5232	4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe
5232	4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe
5232	4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe
5232	4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe
5232	4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe
5232	4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5232	4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe
Token: SeDebugPrivilege	1960	tvq0y9lx.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 5232 wrote to memory of 5556	5232	4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe	87
PID 5232 wrote to memory of 4460	5232	4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe	88
PID 4460 wrote to memory of 6048	4460	cmd.exe	91
PID 5556 wrote to memory of 4912	5556	cmd.exe	92
PID 4460 wrote to memory of 1664	4460	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe
"C:\Users\Admin\AppData\Local\Temp\4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5232
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "tvq0y9lx" /tr '"C:\Users\Admin\AppData\Roaming\tvq0y9lx.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5556
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "tvq0y9lx" /tr '"C:\Users\Admin\AppData\Roaming\tvq0y9lx.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4912
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp893B.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4460
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:6048
- - C:\Users\Admin\AppData\Roaming\tvq0y9lx.exe
    "C:\Users\Admin\AppData\Roaming\tvq0y9lx.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:1664

C:\Users\Admin\AppData\Roaming\tvq0y9lx.exe
"C:\Users\Admin\AppData\Roaming\tvq0y9lx.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:1960

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

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

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

tmp893B.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp893B.tmp.bat
Size 152B
SHA256 c112c3b7ee5b120cbbabd92025ff9cdddb1936e4403827025a4d21efa4afe3f3
MD5 30b5c8564070e620057768db64030419
SHA1 e9a2e53837425c447c22532ec5b8513874308359
SHA512 668abf47d6c3f8a5cd8d08cddf1d8708fd3ff964eb9357e97f08749c2c805a47fff813de2ee4d65e75c7b6c5146727e291b09ec5f073dc00953c0d0f08afa36c
TLSH
T168C08C4251CAEA0F6905642302BA988DA162A8193E81AB00C748480E1780448E0A9341
MD5 SHA1 SHA512 TLSH

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tvq0y9lx.exe

Path C:\Users\Admin\AppData\Roaming\tvq0y9lx.exe
Size 45KB
SHA256 4357f7d42997cbd0730069d5c7c18ae55fd01c7effbe272a338d5a5d09e7d881
MD5 4c6bc580828ff5d0f9aa555f2b30fccb
SHA1 aa6ef4cc3f453d9743d507658239d7f7532aa3be
SHA512 1211fd04a2ade795116b4573440bdf78db40007c0153bec62b5c35b1f6b3ea72733d2bf38714007903a1613da1c5d685d8dd3c53bc3c59b61fe74a8e2a3ca716
SSDEEP 768:UuKWgSJTwU6NkWUGnaSmo2qAmmaPol53APIkzjbHgX3iej8zx6cXTEWBDZcx:UuKWgSJTwRf2Wfob3lk3bAXSeSYcXI4s
TLSH
T1AB2329003BE8813BF2BE5F7899F22145867EF6636603D64A1CC441DB5613FC29A426FE
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1960-12-0x00000000744F2000-0x00000000744F3000-memory.dmp

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memory/5232-0-0x0000000074D92000-0x0000000074D93000-memory.dmp

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memory/5232-1-0x0000000000090000-0x00000000000A2000-memory.dmp

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memory/5232-2-0x0000000074D80000-0x000000007553C000-memory.dmp

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memory/5232-3-0x0000000004BE0000-0x0000000004C7C000-memory.dmp

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memory/5232-8-0x0000000074D80000-0x000000007553C000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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