asyncrat | 747957c357cf6fbb4507831926d64211bcea32f767e4262efe275bba99154089

Analysis

max time kernel
1015s
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.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
behavioral32/files/0x000900000001ab3d-11.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2944	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
1300	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3024	timeout.exe

Suspicious behavior: EnumeratesProcesses 13 IoCs

pid	Process
588	cumme.exe
588	cumme.exe
588	cumme.exe
588	cumme.exe
588	cumme.exe
588	cumme.exe
588	cumme.exe
588	cumme.exe
588	cumme.exe
588	cumme.exe
588	cumme.exe
588	cumme.exe
588	cumme.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2944	cumme.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	588	cumme.exe
Token: SeDebugPrivilege	2944	cumme.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 588 wrote to memory of 1016	588	cumme.exe	72
PID 588 wrote to memory of 1016	588	cumme.exe	72
PID 588 wrote to memory of 2880	588	cumme.exe	74
PID 588 wrote to memory of 2880	588	cumme.exe	74
PID 2880 wrote to memory of 3024	2880	cmd.exe	76
PID 2880 wrote to memory of 3024	2880	cmd.exe	76
PID 1016 wrote to memory of 1300	1016	cmd.exe	77
PID 1016 wrote to memory of 1300	1016	cmd.exe	77
PID 2880 wrote to memory of 2944	2880	cmd.exe	78
PID 2880 wrote to memory of 2944	2880	cmd.exe	78

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.exe
"C:\Users\Admin\AppData\Local\Temp\a ton of cumme\cumme.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:588
- 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:1016
- - 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:1300
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp707D.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2880
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3024
- - 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:2944

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

cumme.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\cumme.exe.log
Size 425B
SHA256 71879c54d43afa910afbabfc59235151a78b42049f79f152773fbfca74b2f294
MD5 2ead231ce66abe78de975d1b05d590a4
SHA1 c269fde7c1d36005928089b0689cecd0a2bc1e1c
SHA512 038480a37fe4227fe04f7323fea842037df486901aab0529145046718ffb48c99e62107f534857ca0023dbb5b72be778bc4911ae2873c01ad826865c44537fdd
MD5 SHA1 SHA512

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tmp707D.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp707D.tmp.bat
Size 149B
SHA256 3e316262c1397cf1911f8581c3101475c3e54d6c65fcfa1ff78b87a587ee2a00
MD5 627d95f3de97338296c2432c1647cffd
SHA1 171b4b301bc79c7a7ceb7013c38e2cee400981fa
SHA512 248a9e0ac0b942efc43099a8b121cc651ffb30356e0ef0f9dcfe90ccca90495ad866f39c47d26d1fc2011ded1449e66687c554e6c44491341575d0e58e76ca99
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/588-0-0x00007FFE32143000-0x00007FFE32144000-memory.dmp

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memory/588-1-0x00000000002C0000-0x00000000002D6000-memory.dmp

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memory/588-2-0x00007FFE32140000-0x00007FFE32B2C000-memory.dmp

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memory/588-3-0x00007FFE32140000-0x00007FFE32B2C000-memory.dmp

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memory/588-9-0x00007FFE32140000-0x00007FFE32B2C000-memory.dmp

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