asyncrat | 747957c357cf6fbb4507831926d64211bcea32f767e4262efe275bba99154089

Analysis

max time kernel
1129s
max time network
1200s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
03/05/2024, 01:41

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General

Target
a ton of cumme/cumme - Copy (31).exe
Size 63KB
Sample240503-b4lqvaea67
SHA256 390f2329d720595861f5bc5bf65cccdd0a76639197f15fb1529e66736a6f6a41
MD5 76034e5a2c3a49ec8232f011d5572d84
SHA1 9dae727f33662a0411fb0f49a51c845fddbb5b98
SHA512 df4a742d9f5da89888a154f4eef3964bf5574f4d679088aa03fc58e8309f06ea942ea291fa2acd87e92c922c59845c1b695d9dd736e3f7b99316c08dd6968a1d
SSDEEP 1536:AqTQa7NVNPHYUYUbzh97IBfusdpqKmY7:A5ANVHYUbz3kJGz
MD5 SHA1 SHA512 SSDEEP

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
behavioral24/files/0x000900000001ab1f-11.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
4988	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
424	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4128	timeout.exe

Suspicious behavior: EnumeratesProcesses 15 IoCs

pid	Process
1980	cumme - Copy (31).exe
1980	cumme - Copy (31).exe
1980	cumme - Copy (31).exe
1980	cumme - Copy (31).exe
1980	cumme - Copy (31).exe
1980	cumme - Copy (31).exe
1980	cumme - Copy (31).exe
1980	cumme - Copy (31).exe
1980	cumme - Copy (31).exe
1980	cumme - Copy (31).exe
1980	cumme - Copy (31).exe
1980	cumme - Copy (31).exe
1980	cumme - Copy (31).exe
1980	cumme - Copy (31).exe
1980	cumme - Copy (31).exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4988	cumme.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1980	cumme - Copy (31).exe
Token: SeDebugPrivilege	4988	cumme.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1980 wrote to memory of 1384	1980	cumme - Copy (31).exe	73
PID 1980 wrote to memory of 1384	1980	cumme - Copy (31).exe	73
PID 1980 wrote to memory of 3108	1980	cumme - Copy (31).exe	75
PID 1980 wrote to memory of 3108	1980	cumme - Copy (31).exe	75
PID 3108 wrote to memory of 4128	3108	cmd.exe	78
PID 3108 wrote to memory of 4128	3108	cmd.exe	78
PID 1384 wrote to memory of 424	1384	cmd.exe	77
PID 1384 wrote to memory of 424	1384	cmd.exe	77
PID 3108 wrote to memory of 4988	3108	cmd.exe	79
PID 3108 wrote to memory of 4988	3108	cmd.exe	79

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 (31).exe
"C:\Users\Admin\AppData\Local\Temp\a ton of cumme\cumme - Copy (31).exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1980
- 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:1384
- - 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:424
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp854D.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3108
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:4128
- - 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:4988

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

tmp854D.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp854D.tmp.bat
Size 149B
SHA256 ea5dd0b6e5858fadf94b9b1de097e92ce7ab35d6e192705d59ad88df7fd9962c
MD5 89918d3edf07cb1a0ce3b735550d3459
SHA1 b3810643567300413da89252d271e8a4a6fec864
SHA512 323f0c59d3690213e14da51acff763673f6cdeb941508ed1e68f2ea7057ce7058030a2ea78714af6bc9fedd0e458bff735e50c3eebedc35fb791528ff253eb0b
MD5 SHA1 SHA512

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cumme.exe

Path C:\Users\Admin\AppData\Roaming\cumme.exe
Size 63KB
SHA256 390f2329d720595861f5bc5bf65cccdd0a76639197f15fb1529e66736a6f6a41
MD5 76034e5a2c3a49ec8232f011d5572d84
SHA1 9dae727f33662a0411fb0f49a51c845fddbb5b98
SHA512 df4a742d9f5da89888a154f4eef3964bf5574f4d679088aa03fc58e8309f06ea942ea291fa2acd87e92c922c59845c1b695d9dd736e3f7b99316c08dd6968a1d
SSDEEP 1536:AqTQa7NVNPHYUYUbzh97IBfusdpqKmY7:A5ANVHYUbz3kJGz
MD5 SHA1 SHA512 SSDEEP

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memory/1980-0-0x0000000000920000-0x0000000000936000-memory.dmp

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memory/1980-1-0x00007FFFD94A0000-0x00007FFFD967B000-memory.dmp

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memory/1980-2-0x00007FFFD94A0000-0x00007FFFD967B000-memory.dmp

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memory/1980-3-0x00007FFFD94A0000-0x00007FFFD967B000-memory.dmp

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memory/1980-8-0x00007FFFD94A0000-0x00007FFFD967B000-memory.dmp

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