asyncrat | a8f85c4fd76bb10503aa02e13d7b9454681ba0888d16feec98a4748c0b0abdd3

General

Target
a8f85c4fd76bb10503aa02e13d7b9454681ba0888d16feec98a4748c0b0abdd3.exe
Size 45KB
Sample260601-vfc9cacv7m
SHA256 a8f85c4fd76bb10503aa02e13d7b9454681ba0888d16feec98a4748c0b0abdd3
MD5 b9c9100ba8e144f2544c9aff99c265b8
SHA1 b7b4304d932cecbd3cd13ea3c146becb83818c1e
SHA512 c16410bae233065f38374f79c440cbbbf4dd12dc89a8772f475f31f4b286aee9966f67c22137567119c9db76fd4146338b8d911a48d75d022696fd05551f2058
SSDEEP 768:JuNz1TtADT1WUVoJPmo2q48mH/GmBOPIVzjbQgX3iVrYxt7n5BDZbx:JuNz1Tts42cmf73V3bXXSVS7ndbx
TLSH
T14A232B003BE8812BF2BE4F789CF26105467AF6A73603D54A2CC4519B5613FC6DA526FE
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

vl69.sbs:443
vl69.sbs:80
vl69.sbs:7797
vl69.sbs:8707
vl69.sbs:6620
www.vl69.sbs:443
www.vl69.sbs:80
www.vl69.sbs:7797
www.vl69.sbs:8707
www.vl69.sbs:6620
trisis.vl69.sbs:443
trisis.vl69.sbs:80
trisis.vl69.sbs:7797
trisis.vl69.sbs:8707
trisis.vl69.sbs:6620
revil.vl69.sbs:443
revil.vl69.sbs:80
revil.vl69.sbs:7797
revil.vl69.sbs:8707
revil.vl69.sbs:6620
iloveyou.vl69.sbs:443
iloveyou.vl69.sbs:80
iloveyou.vl69.sbs:7797
iloveyou.vl69.sbs:8707
iloveyou.vl69.sbs:6620
dridex.vl69.sbs:443
dridex.vl69.sbs:80
dridex.vl69.sbs:7797
dridex.vl69.sbs:8707
dridex.vl69.sbs:6620

Mutex

ive5cChBCF8L

Attributes

delay
0
install
true
install_file
445xe.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/0x001f00000002b2da-9.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
792	445xe.exe
3140	445xe.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	a8f85c4fd76bb10503aa02e13d7b9454681ba0888d16feec98a4748c0b0abdd3.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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	445xe.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	445xe.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4872	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
3116	schtasks.exe

Suspicious behavior: EnumeratesProcesses 17 IoCs

pid	Process
852	a8f85c4fd76bb10503aa02e13d7b9454681ba0888d16feec98a4748c0b0abdd3.exe
852	a8f85c4fd76bb10503aa02e13d7b9454681ba0888d16feec98a4748c0b0abdd3.exe
852	a8f85c4fd76bb10503aa02e13d7b9454681ba0888d16feec98a4748c0b0abdd3.exe
852	a8f85c4fd76bb10503aa02e13d7b9454681ba0888d16feec98a4748c0b0abdd3.exe
852	a8f85c4fd76bb10503aa02e13d7b9454681ba0888d16feec98a4748c0b0abdd3.exe
852	a8f85c4fd76bb10503aa02e13d7b9454681ba0888d16feec98a4748c0b0abdd3.exe
852	a8f85c4fd76bb10503aa02e13d7b9454681ba0888d16feec98a4748c0b0abdd3.exe
852	a8f85c4fd76bb10503aa02e13d7b9454681ba0888d16feec98a4748c0b0abdd3.exe
852	a8f85c4fd76bb10503aa02e13d7b9454681ba0888d16feec98a4748c0b0abdd3.exe
852	a8f85c4fd76bb10503aa02e13d7b9454681ba0888d16feec98a4748c0b0abdd3.exe
852	a8f85c4fd76bb10503aa02e13d7b9454681ba0888d16feec98a4748c0b0abdd3.exe
852	a8f85c4fd76bb10503aa02e13d7b9454681ba0888d16feec98a4748c0b0abdd3.exe
852	a8f85c4fd76bb10503aa02e13d7b9454681ba0888d16feec98a4748c0b0abdd3.exe
852	a8f85c4fd76bb10503aa02e13d7b9454681ba0888d16feec98a4748c0b0abdd3.exe
852	a8f85c4fd76bb10503aa02e13d7b9454681ba0888d16feec98a4748c0b0abdd3.exe
852	a8f85c4fd76bb10503aa02e13d7b9454681ba0888d16feec98a4748c0b0abdd3.exe
852	a8f85c4fd76bb10503aa02e13d7b9454681ba0888d16feec98a4748c0b0abdd3.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	852	a8f85c4fd76bb10503aa02e13d7b9454681ba0888d16feec98a4748c0b0abdd3.exe
Token: SeDebugPrivilege	792	445xe.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 852 wrote to memory of 1736	852	a8f85c4fd76bb10503aa02e13d7b9454681ba0888d16feec98a4748c0b0abdd3.exe	79
PID 852 wrote to memory of 4468	852	a8f85c4fd76bb10503aa02e13d7b9454681ba0888d16feec98a4748c0b0abdd3.exe	81
PID 1736 wrote to memory of 3116	1736	cmd.exe	83
PID 4468 wrote to memory of 4872	4468	cmd.exe	84
PID 4468 wrote to memory of 3140	4468	cmd.exe	87

C:\Users\Admin\AppData\Local\Temp\a8f85c4fd76bb10503aa02e13d7b9454681ba0888d16feec98a4748c0b0abdd3.exe
"C:\Users\Admin\AppData\Local\Temp\a8f85c4fd76bb10503aa02e13d7b9454681ba0888d16feec98a4748c0b0abdd3.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:852
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "445xe" /tr '"C:\Users\Admin\AppData\Roaming\445xe.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1736
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "445xe" /tr '"C:\Users\Admin\AppData\Roaming\445xe.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3116
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpEA1.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4468
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4872
- - C:\Users\Admin\AppData\Roaming\445xe.exe
    "C:\Users\Admin\AppData\Roaming\445xe.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:3140

C:\Users\Admin\AppData\Roaming\445xe.exe
"C:\Users\Admin\AppData\Roaming\445xe.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:792

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

Replay Monitor

Loading Replay Monitor...

Downloads

tmpEA1.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpEA1.tmp.bat
Size 148B
SHA256 e1fd2fe1c9bcbe926d7cd5fea02dd183631d96e367d5f4a433419205d94c5ec0
MD5 f1d82bcea1eb511a7d007c390d837f51
SHA1 267a0c60007e33f2a9f5843c2d9f2206034763fb
SHA512 6d9ff7251be38289249555a1bc4d0e5fa4c9145bb773291148ac8bc5b44dc9a2c7500bcfe3bdfbca568cb89748834d343621875f5a72ccae2cb8d14528732cc4
TLSH
T18CC02B4392C6EA0E7C05345302FAD48CA1B26D2E3F44BB00D344C01D52C0468F5DA343
MD5 SHA1 SHA512 TLSH

Submit Download

445xe.exe

Path C:\Users\Admin\AppData\Roaming\445xe.exe
Size 45KB
SHA256 a8f85c4fd76bb10503aa02e13d7b9454681ba0888d16feec98a4748c0b0abdd3
MD5 b9c9100ba8e144f2544c9aff99c265b8
SHA1 b7b4304d932cecbd3cd13ea3c146becb83818c1e
SHA512 c16410bae233065f38374f79c440cbbbf4dd12dc89a8772f475f31f4b286aee9966f67c22137567119c9db76fd4146338b8d911a48d75d022696fd05551f2058
SSDEEP 768:JuNz1TtADT1WUVoJPmo2q48mH/GmBOPIVzjbQgX3iVrYxt7n5BDZbx:JuNz1Tts42cmf73V3bXXSVS7ndbx
TLSH
T14A232B003BE8812BF2BE4F789CF26105467AF6A73603D54A2CC4519B5613FC6DA526FE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/852-0-0x0000000000870000-0x0000000000882000-memory.dmp

Download

memory/852-1-0x0000000005430000-0x0000000005440000-memory.dmp

Download

memory/852-2-0x00000000052F0000-0x000000000538C000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads