asyncrat | 747957c357cf6fbb4507831926d64211bcea32f767e4262efe275bba99154089

Analysis

max time kernel
1147s
max time network
1195s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
03/05/2024, 01:36

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General

Target

a ton of cumme/cumme - Copy (17).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
behavioral8/files/0x001d00000002ab44-11.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
864	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
1096	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3764	timeout.exe

Suspicious behavior: EnumeratesProcesses 17 IoCs

pid	Process
4184	cumme - Copy (17).exe
4184	cumme - Copy (17).exe
4184	cumme - Copy (17).exe
4184	cumme - Copy (17).exe
4184	cumme - Copy (17).exe
4184	cumme - Copy (17).exe
4184	cumme - Copy (17).exe
4184	cumme - Copy (17).exe
4184	cumme - Copy (17).exe
4184	cumme - Copy (17).exe
4184	cumme - Copy (17).exe
4184	cumme - Copy (17).exe
4184	cumme - Copy (17).exe
4184	cumme - Copy (17).exe
4184	cumme - Copy (17).exe
4184	cumme - Copy (17).exe
4184	cumme - Copy (17).exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
864	cumme.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4184	cumme - Copy (17).exe
Token: SeDebugPrivilege	864	cumme.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4184 wrote to memory of 1824	4184	cumme - Copy (17).exe	80
PID 4184 wrote to memory of 1824	4184	cumme - Copy (17).exe	80
PID 4184 wrote to memory of 3252	4184	cumme - Copy (17).exe	82
PID 4184 wrote to memory of 3252	4184	cumme - Copy (17).exe	82
PID 3252 wrote to memory of 3764	3252	cmd.exe	85
PID 3252 wrote to memory of 3764	3252	cmd.exe	85
PID 1824 wrote to memory of 1096	1824	cmd.exe	84
PID 1824 wrote to memory of 1096	1824	cmd.exe	84
PID 3252 wrote to memory of 864	3252	cmd.exe	86
PID 3252 wrote to memory of 864	3252	cmd.exe	86

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 (17).exe
"C:\Users\Admin\AppData\Local\Temp\a ton of cumme\cumme - Copy (17).exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4184
- 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:1824
- - 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:1096
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp97DB.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3252
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3764
- - C:\Users\Admin\AppData\Roaming\cumme.exe
    "C:\Users\Admin\AppData\Roaming\cumme.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of AdjustPrivilegeToken
    PID:864

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\tmp97DB.tmp.bat

Filesize
149B

MD5
58999e6c40cf9b1db73ec094a509c4be

SHA1
03694607caf0c01483f86a2d88a4c6acd1e58c9a

SHA256
f0414b6b1aac8fe76e1911acfafeddcb3fcd86ba3f4ec78b91987fd48a1d3c77

SHA512
16c2b6167be0cfff3cee72e55df512ba59c8d8ebe3f245d9dca4849964953ea49b9ef08a3ee887e84bc04d7649031bd9dec2a5d9e27cb4bde7b8326a8e906afc

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

Filesize
63KB

MD5
76034e5a2c3a49ec8232f011d5572d84

SHA1
9dae727f33662a0411fb0f49a51c845fddbb5b98

SHA256
390f2329d720595861f5bc5bf65cccdd0a76639197f15fb1529e66736a6f6a41

SHA512
df4a742d9f5da89888a154f4eef3964bf5574f4d679088aa03fc58e8309f06ea942ea291fa2acd87e92c922c59845c1b695d9dd736e3f7b99316c08dd6968a1d

Download Submit
memory/4184-0-0x00007FFE6ADF3000-0x00007FFE6ADF5000-memory.dmp

Filesize
8KB

Download
memory/4184-1-0x0000000000600000-0x0000000000616000-memory.dmp

Filesize
88KB

Download
memory/4184-2-0x00007FFE6ADF0000-0x00007FFE6B8B2000-memory.dmp

Filesize
10.8MB

Download
memory/4184-3-0x00007FFE6ADF0000-0x00007FFE6B8B2000-memory.dmp

Filesize
10.8MB

Download
memory/4184-8-0x00007FFE6ADF0000-0x00007FFE6B8B2000-memory.dmp

Filesize
10.8MB

Download