asyncrat | 685c5bf64885c072aadce5f178f4ec91b6b3dcea76391d59b64bf688e38985d6

General

Target

Infected.exe
Size

63KB
MD5

033a95f31df91d6c986eb0351a7053b4
SHA1

c8945b0f9900fa37e654681e9e4a34aa4cb01e42
SHA256

685c5bf64885c072aadce5f178f4ec91b6b3dcea76391d59b64bf688e38985d6
SHA512

3c14096e54b3de9758f5a6aa2de369967aff87ad4e3a8f525fe2469440581011fefb10edfbd3c7088f5a93d9638a656d57c2feb6c14b7ab190230f07fa665795
SSDEEP

768:Uk/9PXn1w787gC8A+XvqazcBRL5JTk1+T4KSBGHmDbD/ph0oXPVTJ+FpSungpqKX:hR1gMdSJYUbdh9PdXungpqKmY7

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

default-hepatitis.gl.at.ply.gg:10820

Attributes

delay
1
install
true
install_file
system.exe
install_folder
%AppData%

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/0x0008000000023ca1-10.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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	Infected.exe

Executes dropped EXE 1 IoCs

pid	Process
4988	system.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1788	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
3312	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
1616	Infected.exe
1616	Infected.exe
1616	Infected.exe
1616	Infected.exe
1616	Infected.exe
1616	Infected.exe
1616	Infected.exe
1616	Infected.exe
1616	Infected.exe
1616	Infected.exe
1616	Infected.exe
1616	Infected.exe
1616	Infected.exe
1616	Infected.exe
1616	Infected.exe
1616	Infected.exe
1616	Infected.exe
1616	Infected.exe
1616	Infected.exe
1616	Infected.exe
1616	Infected.exe
1616	Infected.exe
1616	Infected.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1616	Infected.exe
Token: SeDebugPrivilege	4988	system.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1616 wrote to memory of 4772	1616	Infected.exe	83
PID 1616 wrote to memory of 4772	1616	Infected.exe	83
PID 1616 wrote to memory of 852	1616	Infected.exe	84
PID 1616 wrote to memory of 852	1616	Infected.exe	84
PID 852 wrote to memory of 1788	852	cmd.exe	87
PID 852 wrote to memory of 1788	852	cmd.exe	87
PID 4772 wrote to memory of 3312	4772	cmd.exe	88
PID 4772 wrote to memory of 3312	4772	cmd.exe	88
PID 852 wrote to memory of 4988	852	cmd.exe	97
PID 852 wrote to memory of 4988	852	cmd.exe	97

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\Infected.exe
"C:\Users\Admin\AppData\Local\Temp\Infected.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1616
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "system" /tr '"C:\Users\Admin\AppData\Roaming\system.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4772
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "system" /tr '"C:\Users\Admin\AppData\Roaming\system.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3312
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp89B2.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:852
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1788
- - C:\Users\Admin\AppData\Roaming\system.exe
    "C:\Users\Admin\AppData\Roaming\system.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:4988

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

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp89B2.tmp.bat

Filesize
150B

MD5
83ff2d971fdcff0e4cba556bc41dfb06

SHA1
6c17bbb46ca7dd67414b72fe35cd6dd60ebfdab3

SHA256
ae63dccda94233f4e7f2cc1321be3cbae679daa5c4cd15407541f4103e26e22b

SHA512
45e68874a1fd25a16c809fd565fcd26ab457a1847d4382f90088a19108a7ea29ae2fdab5c5d181ff5524cbfc8da698aca32d04f3a96c78bf4b1eb4fdc54aa030

Download Submit
C:\Users\Admin\AppData\Roaming\system.exe

Filesize
63KB

MD5
033a95f31df91d6c986eb0351a7053b4

SHA1
c8945b0f9900fa37e654681e9e4a34aa4cb01e42

SHA256
685c5bf64885c072aadce5f178f4ec91b6b3dcea76391d59b64bf688e38985d6

SHA512
3c14096e54b3de9758f5a6aa2de369967aff87ad4e3a8f525fe2469440581011fefb10edfbd3c7088f5a93d9638a656d57c2feb6c14b7ab190230f07fa665795

Download Submit
memory/1616-0-0x00007FFE39143000-0x00007FFE39145000-memory.dmp

Filesize
8KB

Download
memory/1616-1-0x0000000000480000-0x0000000000496000-memory.dmp

Filesize
88KB

Download
memory/1616-2-0x00007FFE39140000-0x00007FFE39C01000-memory.dmp

Filesize
10.8MB

Download
memory/1616-7-0x00007FFE39140000-0x00007FFE39C01000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads