asyncrat | a5a58916499663c7377b89b29964883fa3253c177f66d1ea2f337432bc44e49c

General

Target

Rat.exe
Size

45KB
MD5

45ce089045a1c4294dc9ad3722d29465
SHA1

d63e1ab062687aeab1d3d6a6709cf62b8b477c4d
SHA256

a5a58916499663c7377b89b29964883fa3253c177f66d1ea2f337432bc44e49c
SHA512

95219fb29535db52c3205f5fa28eb3a54e97b7dec9ad7768eade89255ec68d494a82da849efc68d2484b06f2075c305dd494fc01c2e00eedc75717c10e051dcb
SSDEEP

768:Oug1NTjgkH7F7WUHF9pmo2q7OUnZOEIs6JPIazjb1gX3pbPGr25siWBDZex:Oug1NTcIb2dSt/6ma3bSXZTVN4dex

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

81.79.156.77:6606

81.79.156.77:7707

81.79.156.77:8808

Mutex

FW2Ok6cukTID

Attributes

delay
3
install
true
install_file
Discord.exe
install_folder
%Temp%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Asyncrat family
asyncrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/files/0x0029000000045047-12.dat	family_asyncrat

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-87863914-780023816-688321450-1000\Control Panel\International\Geo\Nation	Rat.exe

Executes dropped EXE 1 IoCs

pid	Process
3116	Discord.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 6 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	Discord.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Rat.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

evasion

pid	Process
4084	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
3320	schtasks.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
2492	Rat.exe
2492	Rat.exe
2492	Rat.exe
2492	Rat.exe
2492	Rat.exe
2492	Rat.exe
2492	Rat.exe
2492	Rat.exe
2492	Rat.exe
2492	Rat.exe
2492	Rat.exe
2492	Rat.exe
2492	Rat.exe
2492	Rat.exe
2492	Rat.exe
2492	Rat.exe
2492	Rat.exe
2492	Rat.exe
2492	Rat.exe
2492	Rat.exe
2492	Rat.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2492	Rat.exe
Token: SeDebugPrivilege	3116	Discord.exe
Token: SeDebugPrivilege	3116	Discord.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2492 wrote to memory of 3680	2492	Rat.exe	87
PID 2492 wrote to memory of 3680	2492	Rat.exe	87
PID 2492 wrote to memory of 3680	2492	Rat.exe	87
PID 2492 wrote to memory of 3984	2492	Rat.exe	89
PID 2492 wrote to memory of 3984	2492	Rat.exe	89
PID 2492 wrote to memory of 3984	2492	Rat.exe	89
PID 3984 wrote to memory of 4084	3984	cmd.exe	91
PID 3984 wrote to memory of 4084	3984	cmd.exe	91
PID 3984 wrote to memory of 4084	3984	cmd.exe	91
PID 3680 wrote to memory of 3320	3680	cmd.exe	92
PID 3680 wrote to memory of 3320	3680	cmd.exe	92
PID 3680 wrote to memory of 3320	3680	cmd.exe	92
PID 3984 wrote to memory of 3116	3984	cmd.exe	94
PID 3984 wrote to memory of 3116	3984	cmd.exe	94
PID 3984 wrote to memory of 3116	3984	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\Rat.exe
"C:\Users\Admin\AppData\Local\Temp\Rat.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2492
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Discord" /tr '"C:\Users\Admin\AppData\Local\Temp\Discord.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3680
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Discord" /tr '"C:\Users\Admin\AppData\Local\Temp\Discord.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3320
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp829D.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3984
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4084
- - C:\Users\Admin\AppData\Local\Temp\Discord.exe
    "C:\Users\Admin\AppData\Local\Temp\Discord.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:3116

Network

MITRE ATT&CK Enterprise v15

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

Query Registry

1

T1012

System Information Discovery

2

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

C:\Users\Admin\AppData\Local\Temp\Discord.exe

Filesize
45KB

MD5
45ce089045a1c4294dc9ad3722d29465

SHA1
d63e1ab062687aeab1d3d6a6709cf62b8b477c4d

SHA256
a5a58916499663c7377b89b29964883fa3253c177f66d1ea2f337432bc44e49c

SHA512
95219fb29535db52c3205f5fa28eb3a54e97b7dec9ad7768eade89255ec68d494a82da849efc68d2484b06f2075c305dd494fc01c2e00eedc75717c10e051dcb

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp829D.tmp.bat

Filesize
154B

MD5
d39f14c80907d8e9ee9133da70e4e721

SHA1
283a9cd813a1e8799d411fe6f0709133d1d38142

SHA256
06dfce7b0e199bba36a608a2581e9d99ee0e8a47833353c5c23c02241e4e42ac

SHA512
b1abee63f55abeb14a0f8f31eed17bc4875adc480ad3be7150b63ab9d4f7951577467a9d087a4d047d4696b92a773b3b67fdd592d34500af959d195fe7e194ed

Download Submit
memory/2492-0-0x000000007519E000-0x000000007519F000-memory.dmp

Filesize
4KB

Download
memory/2492-1-0x0000000000F00000-0x0000000000F12000-memory.dmp

Filesize
72KB

Download
memory/2492-2-0x0000000075190000-0x0000000075941000-memory.dmp

Filesize
7.7MB

Download
memory/2492-3-0x00000000058B0000-0x0000000005916000-memory.dmp

Filesize
408KB

Download
memory/2492-4-0x0000000005D20000-0x0000000005DBC000-memory.dmp

Filesize
624KB

Download
memory/2492-9-0x0000000075190000-0x0000000075941000-memory.dmp

Filesize
7.7MB

Download
memory/3116-14-0x00000000750E0000-0x0000000075891000-memory.dmp

Filesize
7.7MB

Download
memory/3116-15-0x00000000750E0000-0x0000000075891000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads