asyncrat | 94bdc554c7cef3aef9bf90626f0cb6c0f3480e9f914a7aad93769a2904545ba6

General

Target
tmps91_vgf8.exe
Size 45KB
Sample260522-yaq5ssgs21
SHA256 94bdc554c7cef3aef9bf90626f0cb6c0f3480e9f914a7aad93769a2904545ba6
MD5 4a588256ac941119761162101ce87cb0
SHA1 964cbd3f88057bd2436ed69b6f7831362df11945
SHA512 713aceab420b42bdd6963ffe8c041d819c3a617f54cf0cdafcb23b9d18b32a15742d895c0462117f7427ed02f38b9c782daac710b47cd26ba2957ed234bdade8
SSDEEP 768:5udNpTNctooWUS7C+mo2qtqhkTwJaOPIcozjbfgaimLJ5+90iUG2G51WlBDZ0x:5udNpTNmU2s0w3co3bojO5+KiUswd0x
TLSH
T104232B0037E8822BF2BE5F7898F26145467AF6673603D58E1CC441DB5613FC68A526FE
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

theweekndstore.com:443
theweekndstore.com:80
theweekndstore.com:7797
theweekndstore.com:8707
theweekndstore.com:6620
www.theweekndstore.com:443
www.theweekndstore.com:80
www.theweekndstore.com:7797
www.theweekndstore.com:8707
www.theweekndstore.com:6620
connect.theweekndstore.com:443
connect.theweekndstore.com:80
connect.theweekndstore.com:7797
connect.theweekndstore.com:8707
connect.theweekndstore.com:6620
melissa.theweekndstore.com:443
melissa.theweekndstore.com:80
melissa.theweekndstore.com:7797
melissa.theweekndstore.com:8707
melissa.theweekndstore.com:6620
gootloader.theweekndstore.com:443
gootloader.theweekndstore.com:80
gootloader.theweekndstore.com:7797
gootloader.theweekndstore.com:8707
gootloader.theweekndstore.com:6620

Mutex

PdtH9eiVy3Yv

Attributes

delay
0
install
true
install_file
647tnn.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
behavioral3/files/0x001e00000002b3c9-8.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
3192	647tnn.exe
2776	647tnn.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	647tnn.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tmps91_vgf8.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	647tnn.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
1700	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
788	schtasks.exe

Suspicious behavior: EnumeratesProcesses 19 IoCs

pid	Process
5480	tmps91_vgf8.exe
5480	tmps91_vgf8.exe
5480	tmps91_vgf8.exe
5480	tmps91_vgf8.exe
5480	tmps91_vgf8.exe
5480	tmps91_vgf8.exe
5480	tmps91_vgf8.exe
5480	tmps91_vgf8.exe
5480	tmps91_vgf8.exe
5480	tmps91_vgf8.exe
5480	tmps91_vgf8.exe
5480	tmps91_vgf8.exe
5480	tmps91_vgf8.exe
5480	tmps91_vgf8.exe
5480	tmps91_vgf8.exe
5480	tmps91_vgf8.exe
5480	tmps91_vgf8.exe
5480	tmps91_vgf8.exe
5480	tmps91_vgf8.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5480	tmps91_vgf8.exe
Token: SeDebugPrivilege	3192	647tnn.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 5480 wrote to memory of 4420	5480	tmps91_vgf8.exe	80
PID 5480 wrote to memory of 1820	5480	tmps91_vgf8.exe	82
PID 4420 wrote to memory of 788	4420	cmd.exe	84
PID 1820 wrote to memory of 1700	1820	cmd.exe	85
PID 1820 wrote to memory of 2776	1820	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\tmps91_vgf8.exe
"C:\Users\Admin\AppData\Local\Temp\tmps91_vgf8.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5480
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "647tnn" /tr '"C:\Users\Admin\AppData\Roaming\647tnn.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4420
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "647tnn" /tr '"C:\Users\Admin\AppData\Roaming\647tnn.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:788
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp8E7F.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1820
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1700
- - C:\Users\Admin\AppData\Roaming\647tnn.exe
    "C:\Users\Admin\AppData\Roaming\647tnn.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2776

C:\Users\Admin\AppData\Roaming\647tnn.exe
"C:\Users\Admin\AppData\Roaming\647tnn.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:3192

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

tmp8E7F.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp8E7F.tmp.bat
Size 150B
SHA256 59c05906e0dc24ab5dc5e777c99c9dfbf69fe7c4243088e43d29d84bbd13b115
MD5 30ec182fe61cb30ca68cb14b93a6f7b1
SHA1 0fd125e13eae555bcf42df3d3b0e17271022e415
SHA512 e4739c87b3e1d5811931e47c5a081bfb6bb509e7f6d5d40449e9c60adb9fc57863511685efd224356856729a484d7f8805122774cd17fa8b9e208af73499d0ec
TLSH
T116C08C8259C5EA1E290AA42307BAD59CA16A68993E80AB00830844199280489E49A281
MD5 SHA1 SHA512 TLSH

Submit Download

647tnn.exe

Path C:\Users\Admin\AppData\Roaming\647tnn.exe
Size 45KB
SHA256 94bdc554c7cef3aef9bf90626f0cb6c0f3480e9f914a7aad93769a2904545ba6
MD5 4a588256ac941119761162101ce87cb0
SHA1 964cbd3f88057bd2436ed69b6f7831362df11945
SHA512 713aceab420b42bdd6963ffe8c041d819c3a617f54cf0cdafcb23b9d18b32a15742d895c0462117f7427ed02f38b9c782daac710b47cd26ba2957ed234bdade8
SSDEEP 768:5udNpTNctooWUS7C+mo2qtqhkTwJaOPIcozjbfgaimLJ5+90iUG2G51WlBDZ0x:5udNpTNmU2s0w3co3bojO5+KiUswd0x
TLSH
T104232B0037E8822BF2BE5F7898F26145467AF6673603D58E1CC441DB5613FC68A526FE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/5480-0-0x00000000008B0000-0x00000000008C2000-memory.dmp

Download

memory/5480-1-0x0000000005270000-0x0000000005280000-memory.dmp

Download

memory/5480-2-0x0000000005320000-0x00000000053BC000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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