asyncrat | 747957c357cf6fbb4507831926d64211bcea32f767e4262efe275bba99154089

Analysis

max time kernel
453s
max time network
1195s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
03/05/2024, 01:36

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General

Target

a ton of cumme/cumme - Copy (4).exe
Size

63KB
MD5

76034e5a2c3a49ec8232f011d5572d84
SHA1

9dae727f33662a0411fb0f49a51c845fddbb5b98
SHA256

390f2329d720595861f5bc5bf65cccdd0a76639197f15fb1529e66736a6f6a41
SHA512

df4a742d9f5da89888a154f4eef3964bf5574f4d679088aa03fc58e8309f06ea942ea291fa2acd87e92c922c59845c1b695d9dd736e3f7b99316c08dd6968a1d
SSDEEP

1536:AqTQa7NVNPHYUYUbzh97IBfusdpqKmY7:A5ANVHYUbz3kJGz

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Botnet

Default

other-fellow.gl.at.ply.gg:42571

Attributes

delay
1
install
true
install_file
cumme.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
behavioral25/files/0x000400000002a9a5-11.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
432	cumme.exe

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
4424	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4872	timeout.exe

Suspicious behavior: EnumeratesProcesses 19 IoCs

pid	Process
4904	cumme - Copy (4).exe
4904	cumme - Copy (4).exe
4904	cumme - Copy (4).exe
4904	cumme - Copy (4).exe
4904	cumme - Copy (4).exe
4904	cumme - Copy (4).exe
4904	cumme - Copy (4).exe
4904	cumme - Copy (4).exe
4904	cumme - Copy (4).exe
4904	cumme - Copy (4).exe
4904	cumme - Copy (4).exe
4904	cumme - Copy (4).exe
4904	cumme - Copy (4).exe
4904	cumme - Copy (4).exe
4904	cumme - Copy (4).exe
4904	cumme - Copy (4).exe
4904	cumme - Copy (4).exe
4904	cumme - Copy (4).exe
4904	cumme - Copy (4).exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4904	cumme - Copy (4).exe
Token: SeDebugPrivilege	432	cumme.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4904 wrote to memory of 1216	4904	cumme - Copy (4).exe	82
PID 4904 wrote to memory of 1216	4904	cumme - Copy (4).exe	82
PID 4904 wrote to memory of 4796	4904	cumme - Copy (4).exe	84
PID 4904 wrote to memory of 4796	4904	cumme - Copy (4).exe	84
PID 1216 wrote to memory of 4424	1216	cmd.exe	86
PID 1216 wrote to memory of 4424	1216	cmd.exe	86
PID 4796 wrote to memory of 4872	4796	cmd.exe	87
PID 4796 wrote to memory of 4872	4796	cmd.exe	87
PID 4796 wrote to memory of 432	4796	cmd.exe	88
PID 4796 wrote to memory of 432	4796	cmd.exe	88

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\a ton of cumme\cumme - Copy (4).exe
"C:\Users\Admin\AppData\Local\Temp\a ton of cumme\cumme - Copy (4).exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4904
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "cumme" /tr '"C:\Users\Admin\AppData\Roaming\cumme.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1216
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "cumme" /tr '"C:\Users\Admin\AppData\Roaming\cumme.exe"'
    3⤵
    - Creates scheduled task(s)
    PID:4424
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp4A57.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4796
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:4872
- - C:\Users\Admin\AppData\Roaming\cumme.exe
    "C:\Users\Admin\AppData\Roaming\cumme.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:432

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp4A57.tmp.bat

Filesize
149B

MD5
1fd1fa0b4285f869ae5fa1dafae0a96e

SHA1
faa782719764d65c53a6bb07445ec73aa1051d70

SHA256
6a658be41ed3b6a206d3cbbff79a8fb1cc618249f744530f730b471cf4e8a81b

SHA512
c56a030f06dd2b92b21b3482294ecfef0e0d9d0823722963da7720c9f585e54bc35c9c25f3632f5efa96e18f7f668e0c421256743235ae7c9f299ff0d2afdb97

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

Filesize
63KB

MD5
76034e5a2c3a49ec8232f011d5572d84

SHA1
9dae727f33662a0411fb0f49a51c845fddbb5b98

SHA256
390f2329d720595861f5bc5bf65cccdd0a76639197f15fb1529e66736a6f6a41

SHA512
df4a742d9f5da89888a154f4eef3964bf5574f4d679088aa03fc58e8309f06ea942ea291fa2acd87e92c922c59845c1b695d9dd736e3f7b99316c08dd6968a1d

Download Submit
memory/4904-0-0x00007FFDFF433000-0x00007FFDFF435000-memory.dmp

Filesize
8KB

Download
memory/4904-1-0x0000000000240000-0x0000000000256000-memory.dmp

Filesize
88KB

Download
memory/4904-2-0x00007FFDFF430000-0x00007FFDFFEF2000-memory.dmp

Filesize
10.8MB

Download
memory/4904-3-0x00007FFDFF430000-0x00007FFDFFEF2000-memory.dmp

Filesize
10.8MB

Download
memory/4904-9-0x00007FFDFF430000-0x00007FFDFFEF2000-memory.dmp

Filesize
10.8MB

Download