asyncrat | 747957c357cf6fbb4507831926d64211bcea32f767e4262efe275bba99154089

Analysis

max time kernel
1563s
max time network
1798s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
03/05/2024, 01:34

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General

Target
a ton of cumme/cumme - Copy (8).exe
Size 63KB
Sample240503-bza4jsbg5x
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
behavioral29/files/0x000b000000014abe-15.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2632	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
2728	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2572	timeout.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1848	cumme - Copy (8).exe
1848	cumme - Copy (8).exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2632	cumme.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1848	cumme - Copy (8).exe
Token: SeDebugPrivilege	2632	cumme.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1848 wrote to memory of 1196	1848	cumme - Copy (8).exe	28
PID 1848 wrote to memory of 1196	1848	cumme - Copy (8).exe	28
PID 1848 wrote to memory of 1196	1848	cumme - Copy (8).exe	28
PID 1848 wrote to memory of 2920	1848	cumme - Copy (8).exe	30
PID 1848 wrote to memory of 2920	1848	cumme - Copy (8).exe	30
PID 1848 wrote to memory of 2920	1848	cumme - Copy (8).exe	30
PID 1196 wrote to memory of 2728	1196	cmd.exe	32
PID 1196 wrote to memory of 2728	1196	cmd.exe	32
PID 1196 wrote to memory of 2728	1196	cmd.exe	32
PID 2920 wrote to memory of 2572	2920	cmd.exe	33
PID 2920 wrote to memory of 2572	2920	cmd.exe	33
PID 2920 wrote to memory of 2572	2920	cmd.exe	33
PID 2920 wrote to memory of 2632	2920	cmd.exe	34
PID 2920 wrote to memory of 2632	2920	cmd.exe	34
PID 2920 wrote to memory of 2632	2920	cmd.exe	34

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 (8).exe
"C:\Users\Admin\AppData\Local\Temp\a ton of cumme\cumme - Copy (8).exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1848
- 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:1196
- - 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:2728
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp1F92.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2920
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2572
- - 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:2632

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

tmp1F92.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp1F92.tmp.bat
Size 149B
SHA256 39fa503d102f1b1b0c449d25e482d29a2b3c7886ba622b2612c59bc4ff46e132
MD5 622b27b66920c5270ea55f73a4600c93
SHA1 70a58f2dd47889c740aa519795cd0999b8e8f5af
SHA512 18b58cfe60253d6626d1551923f3d6936be674b9d890a5ac7d386fa13d161bf342710ece319b272b9b58af7b27189d41a5d670b956f8a4753b65fb86718bb3b6
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/1848-0-0x000007FEF5E93000-0x000007FEF5E94000-memory.dmp

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memory/1848-1-0x0000000001280000-0x0000000001296000-memory.dmp

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memory/1848-2-0x000007FEF5E90000-0x000007FEF687C000-memory.dmp

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memory/1848-12-0x000007FEF5E90000-0x000007FEF687C000-memory.dmp

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memory/1848-11-0x000007FEF5E90000-0x000007FEF687C000-memory.dmp

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memory/2632-17-0x0000000001150000-0x0000000001166000-memory.dmp

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