asyncrat | 747957c357cf6fbb4507831926d64211bcea32f767e4262efe275bba99154089

Analysis

max time kernel
316s
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 (23).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
behavioral15/files/0x000900000001ab18-12.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
4396	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
872	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4060	timeout.exe

Suspicious behavior: EnumeratesProcesses 15 IoCs

pid	Process
4472	cumme - Copy (23).exe
4472	cumme - Copy (23).exe
4472	cumme - Copy (23).exe
4472	cumme - Copy (23).exe
4472	cumme - Copy (23).exe
4472	cumme - Copy (23).exe
4472	cumme - Copy (23).exe
4472	cumme - Copy (23).exe
4472	cumme - Copy (23).exe
4472	cumme - Copy (23).exe
4472	cumme - Copy (23).exe
4472	cumme - Copy (23).exe
4472	cumme - Copy (23).exe
4472	cumme - Copy (23).exe
4472	cumme - Copy (23).exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4472	cumme - Copy (23).exe
Token: SeDebugPrivilege	4396	cumme.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4472 wrote to memory of 500	4472	cumme - Copy (23).exe	75
PID 4472 wrote to memory of 500	4472	cumme - Copy (23).exe	75
PID 4472 wrote to memory of 1932	4472	cumme - Copy (23).exe	77
PID 4472 wrote to memory of 1932	4472	cumme - Copy (23).exe	77
PID 500 wrote to memory of 872	500	cmd.exe	79
PID 500 wrote to memory of 872	500	cmd.exe	79
PID 1932 wrote to memory of 4060	1932	cmd.exe	80
PID 1932 wrote to memory of 4060	1932	cmd.exe	80
PID 1932 wrote to memory of 4396	1932	cmd.exe	81
PID 1932 wrote to memory of 4396	1932	cmd.exe	81

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 (23).exe
"C:\Users\Admin\AppData\Local\Temp\a ton of cumme\cumme - Copy (23).exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4472
- 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:500
- - 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:872
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp85D9.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1932
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:4060
- - C:\Users\Admin\AppData\Roaming\cumme.exe
    "C:\Users\Admin\AppData\Roaming\cumme.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:4396

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

tmp85D9.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp85D9.tmp.bat
Size 149B
SHA256 bc7aba805fcb8074f605f2a570614420f7c66df616ca00fbb4084557c80e99aa
MD5 af394a316203f269b4d438827c0de06f
SHA1 b929d436f9f08782911e155a9a90613d716524d5
SHA512 784e2e4190f250a06dd2143f25723614bf538f70570e3a6b4a082b9952530a2442d4a8d1000c8dfb40347cf6afe065f0ac5695b840ec20b25f5fad6bfd88d090
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/4472-0-0x0000000000930000-0x0000000000946000-memory.dmp

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memory/4472-1-0x00007FFB06773000-0x00007FFB06774000-memory.dmp

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memory/4472-2-0x00007FFB06770000-0x00007FFB0715C000-memory.dmp

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memory/4472-3-0x00007FFB06770000-0x00007FFB0715C000-memory.dmp

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memory/4472-9-0x00007FFB06770000-0x00007FFB0715C000-memory.dmp

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