asyncrat | 4476d0eb2a47cb9bfe3155abf0a1603de727dd127f4df099b344df56c22c0d67

General

Target

setup.exe
Size

63KB
MD5

1b8eea1226cd913da97c0c0b8a806b18
SHA1

4320bde806e4fb5792be6bfb2e0b45ae30033fa0
SHA256

4476d0eb2a47cb9bfe3155abf0a1603de727dd127f4df099b344df56c22c0d67
SHA512

70fca344d74efe3e1bf9268e36bd2aac698e69cde340559f5a0df603bf996d06f6b60920cf02ecf19c8532f6a6d6210a4c9ad54a61ddbf12541ae0cfee3da7f1
SSDEEP

1536:zZgPH9F4s1THE6HTIiTEulumGbb+wAe+EhGG0kpqKmY7:zZgPH9F4sBHLTIiTnGbb+xmuvz

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

1.2

Botnet

Default

C2

stores-less.gl.at.ply.gg:45080

Mutex

AtomRatMutex_penka

Attributes

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

aes.plain

Signatures

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/0x00090000000233e9-10.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-1-5-21-2721909339-1374969515-2476821579-1000\Control Panel\International\Geo\Nation	setup.exe

Executes dropped EXE 1 IoCs

pid	Process
2700	piskat.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
1228	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
5084	schtasks.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
3148	setup.exe
3148	setup.exe
3148	setup.exe
3148	setup.exe
3148	setup.exe
3148	setup.exe
3148	setup.exe
3148	setup.exe
3148	setup.exe
3148	setup.exe
3148	setup.exe
3148	setup.exe
3148	setup.exe
3148	setup.exe
3148	setup.exe
3148	setup.exe
3148	setup.exe
3148	setup.exe
3148	setup.exe
3148	setup.exe
3148	setup.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3148	setup.exe
Token: SeDebugPrivilege	2700	piskat.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3148 wrote to memory of 1584	3148	setup.exe	86
PID 3148 wrote to memory of 1584	3148	setup.exe	86
PID 3148 wrote to memory of 4760	3148	setup.exe	88
PID 3148 wrote to memory of 4760	3148	setup.exe	88
PID 4760 wrote to memory of 1228	4760	cmd.exe	90
PID 4760 wrote to memory of 1228	4760	cmd.exe	90
PID 1584 wrote to memory of 5084	1584	cmd.exe	91
PID 1584 wrote to memory of 5084	1584	cmd.exe	91
PID 4760 wrote to memory of 2700	4760	cmd.exe	92
PID 4760 wrote to memory of 2700	4760	cmd.exe	92

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\setup.exe
"C:\Users\Admin\AppData\Local\Temp\setup.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3148
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "piskat" /tr '"C:\Users\Admin\AppData\Roaming\piskat.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1584
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "piskat" /tr '"C:\Users\Admin\AppData\Roaming\piskat.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:5084
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpA633.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4760
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1228
- - C:\Users\Admin\AppData\Roaming\piskat.exe
    "C:\Users\Admin\AppData\Roaming\piskat.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:2700

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\tmpA633.tmp.bat

Filesize
150B

MD5
17de485c5edd62a0ac5417aea5b0d18a

SHA1
7f15e79ac302b8d45f3c8a39c8b97d92d56fc288

SHA256
ac14135d918e9e68715f34d053e01bf14b244782e8e139a8bdba84cf6cd8a6a8

SHA512
9d7177b8971f0cda2a7dcba415979c3a22ca968eefc281698b63df4aaa78c2f92d39ee830c691d7280ff16536c84084fc776dd2f44fa8b2b42ce14d6a17db531

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

Filesize
63KB

MD5
1b8eea1226cd913da97c0c0b8a806b18

SHA1
4320bde806e4fb5792be6bfb2e0b45ae30033fa0

SHA256
4476d0eb2a47cb9bfe3155abf0a1603de727dd127f4df099b344df56c22c0d67

SHA512
70fca344d74efe3e1bf9268e36bd2aac698e69cde340559f5a0df603bf996d06f6b60920cf02ecf19c8532f6a6d6210a4c9ad54a61ddbf12541ae0cfee3da7f1

Download Submit
memory/3148-1-0x00007FFC094E3000-0x00007FFC094E5000-memory.dmp

Filesize
8KB

Download
memory/3148-0-0x000001E2D3200000-0x000001E2D3216000-memory.dmp

Filesize
88KB

Download
memory/3148-2-0x00007FFC094E0000-0x00007FFC09FA1000-memory.dmp

Filesize
10.8MB

Download
memory/3148-7-0x00007FFC094E0000-0x00007FFC09FA1000-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