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 (30).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
behavioral23/files/0x000b00000001ab56-11.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
4940	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
3144	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
428	timeout.exe

Suspicious behavior: EnumeratesProcesses 15 IoCs

pid	Process
4024	cumme - Copy (30).exe
4024	cumme - Copy (30).exe
4024	cumme - Copy (30).exe
4024	cumme - Copy (30).exe
4024	cumme - Copy (30).exe
4024	cumme - Copy (30).exe
4024	cumme - Copy (30).exe
4024	cumme - Copy (30).exe
4024	cumme - Copy (30).exe
4024	cumme - Copy (30).exe
4024	cumme - Copy (30).exe
4024	cumme - Copy (30).exe
4024	cumme - Copy (30).exe
4024	cumme - Copy (30).exe
4024	cumme - Copy (30).exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4024	cumme - Copy (30).exe
Token: SeDebugPrivilege	4940	cumme.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4024 wrote to memory of 32	4024	cumme - Copy (30).exe	73
PID 4024 wrote to memory of 32	4024	cumme - Copy (30).exe	73
PID 4024 wrote to memory of 2448	4024	cumme - Copy (30).exe	75
PID 4024 wrote to memory of 2448	4024	cumme - Copy (30).exe	75
PID 2448 wrote to memory of 428	2448	cmd.exe	77
PID 2448 wrote to memory of 428	2448	cmd.exe	77
PID 32 wrote to memory of 3144	32	cmd.exe	78
PID 32 wrote to memory of 3144	32	cmd.exe	78
PID 2448 wrote to memory of 4940	2448	cmd.exe	79
PID 2448 wrote to memory of 4940	2448	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 (30).exe
"C:\Users\Admin\AppData\Local\Temp\a ton of cumme\cumme - Copy (30).exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4024
- 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:32
- - 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:3144
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp6292.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2448
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:428
- - C:\Users\Admin\AppData\Roaming\cumme.exe
    "C:\Users\Admin\AppData\Roaming\cumme.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:4940

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

Replay Monitor

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Downloads

tmp6292.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp6292.tmp.bat
Size 149B
SHA256 1102b1482975f30aa94800cb432e14d87ff9013ac03c93d01d23edd970c1543d
MD5 a365c22f2836715f0bd823f830ce8347
SHA1 319d171a9ff325ea59d116352a9e56a7b7c168a3
SHA512 22b4c486f1e396ff2595ffd433e34666edafc1dd892a0d55dc3d9fad183b01906990f82c4e30b600555d1f1d13dad9ea4c96963e1b164507605e86d38acdc2b3
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/4024-0-0x0000000000A90000-0x0000000000AA6000-memory.dmp

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memory/4024-1-0x00007FFF34733000-0x00007FFF34734000-memory.dmp

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memory/4024-2-0x00007FFF34730000-0x00007FFF3511C000-memory.dmp

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memory/4024-3-0x00007FFF34730000-0x00007FFF3511C000-memory.dmp

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memory/4024-8-0x00007FFF34730000-0x00007FFF3511C000-memory.dmp

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