asyncrat | 747957c357cf6fbb4507831926d64211bcea32f767e4262efe275bba99154089

Analysis

max time kernel
1556s
max time network
1804s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
03/05/2024, 01:34

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General

Target
a ton of cumme/cumme - Copy (19).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
behavioral10/files/0x0009000000015c23-15.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2788	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
2640	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2672	timeout.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2776	cumme - Copy (19).exe
2776	cumme - Copy (19).exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2788	cumme.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2776	cumme - Copy (19).exe
Token: SeDebugPrivilege	2788	cumme.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2776 wrote to memory of 1532	2776	cumme - Copy (19).exe	28
PID 2776 wrote to memory of 1532	2776	cumme - Copy (19).exe	28
PID 2776 wrote to memory of 1532	2776	cumme - Copy (19).exe	28
PID 2776 wrote to memory of 2956	2776	cumme - Copy (19).exe	30
PID 2776 wrote to memory of 2956	2776	cumme - Copy (19).exe	30
PID 2776 wrote to memory of 2956	2776	cumme - Copy (19).exe	30
PID 1532 wrote to memory of 2640	1532	cmd.exe	32
PID 1532 wrote to memory of 2640	1532	cmd.exe	32
PID 1532 wrote to memory of 2640	1532	cmd.exe	32
PID 2956 wrote to memory of 2672	2956	cmd.exe	33
PID 2956 wrote to memory of 2672	2956	cmd.exe	33
PID 2956 wrote to memory of 2672	2956	cmd.exe	33
PID 2956 wrote to memory of 2788	2956	cmd.exe	34
PID 2956 wrote to memory of 2788	2956	cmd.exe	34
PID 2956 wrote to memory of 2788	2956	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 (19).exe
"C:\Users\Admin\AppData\Local\Temp\a ton of cumme\cumme - Copy (19).exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2776
- 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:1532
- - 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:2640
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp99A1.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2956
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2672
- - 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:2788

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

tmp99A1.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp99A1.tmp.bat
Size 149B
SHA256 83aeafda0e2a1a9feed80f2982eae9037e48aebc87902383ab05910a533df51a
MD5 d09bd783eaf05af269f82cad6023977e
SHA1 3c14b292956e388543f6a5a41e70a2cc1b135964
SHA512 82bfb22ff3b1246c81a370a717fcd8adbdd53bbcbffadac039decddb076e0a16d17bd6e34d5154adf58a89fb9249fa849b8e662e1e7c276b846cfe0ca176ffd3
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/2776-0-0x000007FEF5C43000-0x000007FEF5C44000-memory.dmp

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memory/2776-1-0x0000000000F00000-0x0000000000F16000-memory.dmp

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memory/2776-2-0x000007FEF5C40000-0x000007FEF662C000-memory.dmp

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memory/2776-3-0x000007FEF5C40000-0x000007FEF662C000-memory.dmp

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memory/2776-13-0x000007FEF5C40000-0x000007FEF662C000-memory.dmp

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memory/2788-17-0x0000000000E20000-0x0000000000E36000-memory.dmp

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