asyncrat | f18d1a0f016f8f01961f37b72827925d68813daf82a09c82944bb4e6e26a7627

General

Target
f18d1a0f016f8f01961f37b72827925d68813daf82a09c82944bb4e6e26a7627.exe
Size 45KB
Sample260531-tp63caex4q
SHA256 f18d1a0f016f8f01961f37b72827925d68813daf82a09c82944bb4e6e26a7627
MD5 16529f7af3958c9087986708942f67d9
SHA1 49c0598305a35c380f2efcb90f33767476a22c61
SHA512 264b9b36baf31aab096c7bb63d4f3bf74ee1f6d1298802b6ed7e0e101228ccd8b2791064496c58829ab9ab9c1985e7a1e1366b17dd8ceef880b521313e410e7c
SSDEEP 768:5ugYNTRAL97WUHZaiSpmo2q7P0eUNEARViZPI6zjbrgI3iW4vR39siBDZLx:5ugYNTRQMB28Ue+iW63bUISWArscdLx
TLSH
T1C2232C003BE8812BF2BE4F7859F26245867AF6672603D54A1CC451DB5713FC68A43AFE
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

xnxx.tv:443
xnxx.tv:80
xnxx.tv:7797
xnxx.tv:8707
xnxx.tv:6620
www.xnxx.tv:443
www.xnxx.tv:80
www.xnxx.tv:7797
www.xnxx.tv:8707
www.xnxx.tv:6620
formbook.xnxx.tv:443
formbook.xnxx.tv:80
formbook.xnxx.tv:7797
formbook.xnxx.tv:8707
formbook.xnxx.tv:6620
hacker.xnxx.tv:443
hacker.xnxx.tv:80
hacker.xnxx.tv:7797
hacker.xnxx.tv:8707
hacker.xnxx.tv:6620

Mutex

0FVmXjKPUd6o

Attributes

delay
0
install
true
install_file
beci.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/0x001c00000002b3b6-8.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
4972	beci.exe
3624	beci.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	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	beci.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	beci.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f18d1a0f016f8f01961f37b72827925d68813daf82a09c82944bb4e6e26a7627.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
5228	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
2772	schtasks.exe

Suspicious behavior: EnumeratesProcesses 19 IoCs

pid	Process
1704	f18d1a0f016f8f01961f37b72827925d68813daf82a09c82944bb4e6e26a7627.exe
1704	f18d1a0f016f8f01961f37b72827925d68813daf82a09c82944bb4e6e26a7627.exe
1704	f18d1a0f016f8f01961f37b72827925d68813daf82a09c82944bb4e6e26a7627.exe
1704	f18d1a0f016f8f01961f37b72827925d68813daf82a09c82944bb4e6e26a7627.exe
1704	f18d1a0f016f8f01961f37b72827925d68813daf82a09c82944bb4e6e26a7627.exe
1704	f18d1a0f016f8f01961f37b72827925d68813daf82a09c82944bb4e6e26a7627.exe
1704	f18d1a0f016f8f01961f37b72827925d68813daf82a09c82944bb4e6e26a7627.exe
1704	f18d1a0f016f8f01961f37b72827925d68813daf82a09c82944bb4e6e26a7627.exe
1704	f18d1a0f016f8f01961f37b72827925d68813daf82a09c82944bb4e6e26a7627.exe
1704	f18d1a0f016f8f01961f37b72827925d68813daf82a09c82944bb4e6e26a7627.exe
1704	f18d1a0f016f8f01961f37b72827925d68813daf82a09c82944bb4e6e26a7627.exe
1704	f18d1a0f016f8f01961f37b72827925d68813daf82a09c82944bb4e6e26a7627.exe
1704	f18d1a0f016f8f01961f37b72827925d68813daf82a09c82944bb4e6e26a7627.exe
1704	f18d1a0f016f8f01961f37b72827925d68813daf82a09c82944bb4e6e26a7627.exe
1704	f18d1a0f016f8f01961f37b72827925d68813daf82a09c82944bb4e6e26a7627.exe
1704	f18d1a0f016f8f01961f37b72827925d68813daf82a09c82944bb4e6e26a7627.exe
1704	f18d1a0f016f8f01961f37b72827925d68813daf82a09c82944bb4e6e26a7627.exe
1704	f18d1a0f016f8f01961f37b72827925d68813daf82a09c82944bb4e6e26a7627.exe
1704	f18d1a0f016f8f01961f37b72827925d68813daf82a09c82944bb4e6e26a7627.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1704	f18d1a0f016f8f01961f37b72827925d68813daf82a09c82944bb4e6e26a7627.exe
Token: SeDebugPrivilege	4972	beci.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1704 wrote to memory of 3144	1704	f18d1a0f016f8f01961f37b72827925d68813daf82a09c82944bb4e6e26a7627.exe	81
PID 1704 wrote to memory of 3788	1704	f18d1a0f016f8f01961f37b72827925d68813daf82a09c82944bb4e6e26a7627.exe	83
PID 3144 wrote to memory of 2772	3144	cmd.exe	85
PID 3788 wrote to memory of 5228	3788	cmd.exe	86
PID 3788 wrote to memory of 3624	3788	cmd.exe	89

C:\Users\Admin\AppData\Local\Temp\f18d1a0f016f8f01961f37b72827925d68813daf82a09c82944bb4e6e26a7627.exe
"C:\Users\Admin\AppData\Local\Temp\f18d1a0f016f8f01961f37b72827925d68813daf82a09c82944bb4e6e26a7627.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1704
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "beci" /tr '"C:\Users\Admin\AppData\Roaming\beci.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3144
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "beci" /tr '"C:\Users\Admin\AppData\Roaming\beci.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2772
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp5B98.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3788
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:5228
- - C:\Users\Admin\AppData\Roaming\beci.exe
    "C:\Users\Admin\AppData\Roaming\beci.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:3624

C:\Users\Admin\AppData\Roaming\beci.exe
"C:\Users\Admin\AppData\Roaming\beci.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:4972

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

tmp5B98.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp5B98.tmp.bat
Size 148B
SHA256 e3ced0620abf582c8fe924de77669d94914f684e46a7ad5b686154362cb86c12
MD5 97a7041ea21b9412972159b6a0ffefe6
SHA1 3eeee7ec16465db69cd517d8c9de4dace3e68e84
SHA512 e98e3649fbb0d630f938d9a39ad2b0926aacd55a0e0fcb46c54a48f786ca41d6554669adca6598aee714100bd742b9906eca7a3c6ddac9cb2fca4e2aec986fa4
TLSH
T18EC02B4291C6FE0E2845182303FFD98D91726D1E3F40FB10D344810F268045CF4DA345
MD5 SHA1 SHA512 TLSH

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beci.exe

Path C:\Users\Admin\AppData\Roaming\beci.exe
Size 45KB
SHA256 f18d1a0f016f8f01961f37b72827925d68813daf82a09c82944bb4e6e26a7627
MD5 16529f7af3958c9087986708942f67d9
SHA1 49c0598305a35c380f2efcb90f33767476a22c61
SHA512 264b9b36baf31aab096c7bb63d4f3bf74ee1f6d1298802b6ed7e0e101228ccd8b2791064496c58829ab9ab9c1985e7a1e1366b17dd8ceef880b521313e410e7c
SSDEEP 768:5ugYNTRAL97WUHZaiSpmo2q7P0eUNEARViZPI6zjbrgI3iW4vR39siBDZLx:5ugYNTRQMB28Ue+iW63bUISWArscdLx
TLSH
T1C2232C003BE8812BF2BE4F7859F26245867AF6672603D54A1CC451DB5713FC68A43AFE
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1704-0-0x0000000000150000-0x0000000000162000-memory.dmp

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memory/1704-1-0x0000000004C70000-0x0000000004C80000-memory.dmp

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memory/1704-2-0x0000000004BD0000-0x0000000004C6C000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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