asyncrat | 96f7375323f87112efe27a80ff449acf5e41f111734bb5ce5efb7253a6e685e7

General

Target
96f7375323f87112efe27a80ff449acf5e41f111734bb5ce5efb7253a6e685e7.exe
Size 45KB
Sample260531-wt38csdx4w
SHA256 96f7375323f87112efe27a80ff449acf5e41f111734bb5ce5efb7253a6e685e7
MD5 067fdc450bb5945cf6ac699bf14ca5a5
SHA1 6a7fc52dfbb3655e006140f06dfb453432d16683
SHA512 b4c986bc312e0ef57223d9e5d0010f1c2e1da24c9ecb0ff1881b3b128800bc798efe3581a960eb27e3b5f0d42b4355da5bdd361862950b9aafdb16c4017b7863
SSDEEP 768:5ugYNTRAL97WUHZaiSpmo2q7g0b3NLAteiZPImzjb4g53iX5LlhCSLLoIOaGdCoE:5ugYNTRQMB2I3ZhiWm3bv5SX5LVLLvjL
TLSH
T19E231B003BE9812BF2BE4F78A8F26145867AF6673603D5491CC451DB5713FC69A03AEE
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

vlxvn.vip:443
vlxvn.vip:80
vlxvn.vip:7797
vlxvn.vip:8707
vlxvn.vip:6620
www.vlxvn.vip:443
www.vlxvn.vip:80
www.vlxvn.vip:7797
www.vlxvn.vip:8707
www.vlxvn.vip:6620
revil.vlxvn.vip:443
revil.vlxvn.vip:80
revil.vlxvn.vip:7797
revil.vlxvn.vip:8707
revil.vlxvn.vip:6620
sobig.vlxvn.vip:443
sobig.vlxvn.vip:80
sobig.vlxvn.vip:7797
sobig.vlxvn.vip:8707
sobig.vlxvn.vip:6620

Mutex

RTwTNrNLiWWl

Attributes

delay
0
install
true
install_file
tdyk.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/0x001d00000002b317-8.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
1880	tdyk.exe
4316	tdyk.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tdyk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tdyk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	96f7375323f87112efe27a80ff449acf5e41f111734bb5ce5efb7253a6e685e7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
2224	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
3344	schtasks.exe

Suspicious behavior: EnumeratesProcesses 19 IoCs

pid	Process
916	96f7375323f87112efe27a80ff449acf5e41f111734bb5ce5efb7253a6e685e7.exe
916	96f7375323f87112efe27a80ff449acf5e41f111734bb5ce5efb7253a6e685e7.exe
916	96f7375323f87112efe27a80ff449acf5e41f111734bb5ce5efb7253a6e685e7.exe
916	96f7375323f87112efe27a80ff449acf5e41f111734bb5ce5efb7253a6e685e7.exe
916	96f7375323f87112efe27a80ff449acf5e41f111734bb5ce5efb7253a6e685e7.exe
916	96f7375323f87112efe27a80ff449acf5e41f111734bb5ce5efb7253a6e685e7.exe
916	96f7375323f87112efe27a80ff449acf5e41f111734bb5ce5efb7253a6e685e7.exe
916	96f7375323f87112efe27a80ff449acf5e41f111734bb5ce5efb7253a6e685e7.exe
916	96f7375323f87112efe27a80ff449acf5e41f111734bb5ce5efb7253a6e685e7.exe
916	96f7375323f87112efe27a80ff449acf5e41f111734bb5ce5efb7253a6e685e7.exe
916	96f7375323f87112efe27a80ff449acf5e41f111734bb5ce5efb7253a6e685e7.exe
916	96f7375323f87112efe27a80ff449acf5e41f111734bb5ce5efb7253a6e685e7.exe
916	96f7375323f87112efe27a80ff449acf5e41f111734bb5ce5efb7253a6e685e7.exe
916	96f7375323f87112efe27a80ff449acf5e41f111734bb5ce5efb7253a6e685e7.exe
916	96f7375323f87112efe27a80ff449acf5e41f111734bb5ce5efb7253a6e685e7.exe
916	96f7375323f87112efe27a80ff449acf5e41f111734bb5ce5efb7253a6e685e7.exe
916	96f7375323f87112efe27a80ff449acf5e41f111734bb5ce5efb7253a6e685e7.exe
916	96f7375323f87112efe27a80ff449acf5e41f111734bb5ce5efb7253a6e685e7.exe
916	96f7375323f87112efe27a80ff449acf5e41f111734bb5ce5efb7253a6e685e7.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	916	96f7375323f87112efe27a80ff449acf5e41f111734bb5ce5efb7253a6e685e7.exe
Token: SeDebugPrivilege	1880	tdyk.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 916 wrote to memory of 1116	916	96f7375323f87112efe27a80ff449acf5e41f111734bb5ce5efb7253a6e685e7.exe	78
PID 916 wrote to memory of 2912	916	96f7375323f87112efe27a80ff449acf5e41f111734bb5ce5efb7253a6e685e7.exe	80
PID 1116 wrote to memory of 3344	1116	cmd.exe	82
PID 2912 wrote to memory of 2224	2912	cmd.exe	83
PID 2912 wrote to memory of 4316	2912	cmd.exe	86

C:\Users\Admin\AppData\Local\Temp\96f7375323f87112efe27a80ff449acf5e41f111734bb5ce5efb7253a6e685e7.exe
"C:\Users\Admin\AppData\Local\Temp\96f7375323f87112efe27a80ff449acf5e41f111734bb5ce5efb7253a6e685e7.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:916
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "tdyk" /tr '"C:\Users\Admin\AppData\Roaming\tdyk.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1116
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "tdyk" /tr '"C:\Users\Admin\AppData\Roaming\tdyk.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3344
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp6165.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2912
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2224
- - C:\Users\Admin\AppData\Roaming\tdyk.exe
    "C:\Users\Admin\AppData\Roaming\tdyk.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4316

C:\Users\Admin\AppData\Roaming\tdyk.exe
"C:\Users\Admin\AppData\Roaming\tdyk.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:1880

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

tmp6165.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp6165.tmp.bat
Size 148B
SHA256 5bfa92238419e1b118ae1c6e4db0d4efcbd13cdebd8be7a146b12bafc16c65c4
MD5 7ebf4e196aad7f56e378ae61c6953616
SHA1 537e57f14e758e8ff7ace2e06cafc5113c294416
SHA512 16ff8bef02443acf5931b32e5c4b1f1fe78fa5a5fd836a4a6ea73e429d6064ce14763784ed0ff57e50d569e8e1a721b92685a977147da17c7e63d3e0e28a055a
TLSH
T1D2C02B5251C9EB0E3C09141306FBD59CE172AC293F80BB00C3444C0E12C04C8F0ED341
MD5 SHA1 SHA512 TLSH

Submit Download

tdyk.exe

Path C:\Users\Admin\AppData\Roaming\tdyk.exe
Size 45KB
SHA256 96f7375323f87112efe27a80ff449acf5e41f111734bb5ce5efb7253a6e685e7
MD5 067fdc450bb5945cf6ac699bf14ca5a5
SHA1 6a7fc52dfbb3655e006140f06dfb453432d16683
SHA512 b4c986bc312e0ef57223d9e5d0010f1c2e1da24c9ecb0ff1881b3b128800bc798efe3581a960eb27e3b5f0d42b4355da5bdd361862950b9aafdb16c4017b7863
SSDEEP 768:5ugYNTRAL97WUHZaiSpmo2q7g0b3NLAteiZPImzjb4g53iX5LlhCSLLoIOaGdCoE:5ugYNTRQMB2I3ZhiWm3bv5SX5LVLLvjL
TLSH
T19E231B003BE9812BF2BE4F78A8F26145867AF6673603D5491CC451DB5713FC69A03AEE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/916-0-0x0000000000230000-0x0000000000242000-memory.dmp

Download

memory/916-1-0x0000000004D30000-0x0000000004D40000-memory.dmp

Download

memory/916-2-0x0000000004D40000-0x0000000004DDC000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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