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
behavioral1/files/0x000b000000023b60-12.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-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	Rat.exe

Executes dropped EXE 1 IoCs

pid	Process
3148	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	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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Discord.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4748	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
4488	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
392	Rat.exe
392	Rat.exe
392	Rat.exe
392	Rat.exe
392	Rat.exe
392	Rat.exe
392	Rat.exe
392	Rat.exe
392	Rat.exe
392	Rat.exe
392	Rat.exe
392	Rat.exe
392	Rat.exe
392	Rat.exe
392	Rat.exe
392	Rat.exe
392	Rat.exe
392	Rat.exe
392	Rat.exe
392	Rat.exe
392	Rat.exe
392	Rat.exe
392	Rat.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	392	Rat.exe
Token: SeDebugPrivilege	3148	Discord.exe
Token: SeDebugPrivilege	3148	Discord.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 392 wrote to memory of 2056	392	Rat.exe	86
PID 392 wrote to memory of 2056	392	Rat.exe	86
PID 392 wrote to memory of 2056	392	Rat.exe	86
PID 392 wrote to memory of 1196	392	Rat.exe	88
PID 392 wrote to memory of 1196	392	Rat.exe	88
PID 392 wrote to memory of 1196	392	Rat.exe	88
PID 2056 wrote to memory of 4488	2056	cmd.exe	90
PID 2056 wrote to memory of 4488	2056	cmd.exe	90
PID 2056 wrote to memory of 4488	2056	cmd.exe	90
PID 1196 wrote to memory of 4748	1196	cmd.exe	91
PID 1196 wrote to memory of 4748	1196	cmd.exe	91
PID 1196 wrote to memory of 4748	1196	cmd.exe	91
PID 1196 wrote to memory of 3148	1196	cmd.exe	92
PID 1196 wrote to memory of 3148	1196	cmd.exe	92
PID 1196 wrote to memory of 3148	1196	cmd.exe	92

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:392
- 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:2056
- - 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:4488
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp855C.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1196
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4748
- - 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:3148

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:4588

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

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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\tmp855C.tmp.bat

Filesize
154B

MD5
561e4f9bd9f7197724faa981947271df

SHA1
068c59ad288871bd019884db977d5d4eb461f750

SHA256
9e4fb80b9496114c788ee4b2c8e57fa46c2c0c6caf187ec2ff7b3b674d851116

SHA512
6dcfc59a6fb807043d20ae886161ba94b1b7d48755e422387ad25a7a0ecde14c5cdb25c177df6dee60abdacb1d3e3234ad97447b8b908cd1fd49d03b2748e90e

Download Submit
memory/392-0-0x000000007454E000-0x000000007454F000-memory.dmp

Filesize
4KB

Download
memory/392-1-0x0000000000F00000-0x0000000000F12000-memory.dmp

Filesize
72KB

Download
memory/392-2-0x0000000074540000-0x0000000074CF0000-memory.dmp

Filesize
7.7MB

Download
memory/392-3-0x0000000005900000-0x0000000005966000-memory.dmp

Filesize
408KB

Download
memory/392-4-0x0000000005D50000-0x0000000005DEC000-memory.dmp

Filesize
624KB

Download
memory/392-9-0x0000000074540000-0x0000000074CF0000-memory.dmp

Filesize
7.7MB

Download
memory/3148-14-0x0000000074490000-0x0000000074C40000-memory.dmp

Filesize
7.7MB

Download
memory/3148-15-0x0000000074490000-0x0000000074C40000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads