asyncrat | 747957c357cf6fbb4507831926d64211bcea32f767e4262efe275bba99154089

Analysis

max time kernel
1559s
max time network
1802s
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 (2).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
behavioral11/files/0x000c00000001445e-15.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2416	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
2636	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2652	timeout.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2868	cumme - Copy (2).exe
2868	cumme - Copy (2).exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2416	cumme.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2868	cumme - Copy (2).exe
Token: SeDebugPrivilege	2416	cumme.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2868 wrote to memory of 2892	2868	cumme - Copy (2).exe	28
PID 2868 wrote to memory of 2892	2868	cumme - Copy (2).exe	28
PID 2868 wrote to memory of 2892	2868	cumme - Copy (2).exe	28
PID 2868 wrote to memory of 2624	2868	cumme - Copy (2).exe	30
PID 2868 wrote to memory of 2624	2868	cumme - Copy (2).exe	30
PID 2868 wrote to memory of 2624	2868	cumme - Copy (2).exe	30
PID 2892 wrote to memory of 2636	2892	cmd.exe	31
PID 2892 wrote to memory of 2636	2892	cmd.exe	31
PID 2892 wrote to memory of 2636	2892	cmd.exe	31
PID 2624 wrote to memory of 2652	2624	cmd.exe	33
PID 2624 wrote to memory of 2652	2624	cmd.exe	33
PID 2624 wrote to memory of 2652	2624	cmd.exe	33
PID 2624 wrote to memory of 2416	2624	cmd.exe	34
PID 2624 wrote to memory of 2416	2624	cmd.exe	34
PID 2624 wrote to memory of 2416	2624	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 (2).exe
"C:\Users\Admin\AppData\Local\Temp\a ton of cumme\cumme - Copy (2).exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2868
- 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:2892
- - 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:2636
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp7EF0.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2624
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2652
- - 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:2416

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

tmp7EF0.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp7EF0.tmp.bat
Size 149B
SHA256 461327b23d5084fd97a08a5a74e417eee30657aea3a515dcf4e4d7eca388c614
MD5 4ad7a7113e6ce51868a4fa9dc1109b20
SHA1 672a7b0305f5ea7a908d763c639dbe376fc1befa
SHA512 198c8777311c9d626cb7becce3e552efbd43e2e6ad1ceca5b19751901f1356a56056956863786ef7c3683336fdaa2924ac296d23fce566c8a69272666044519d
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/2416-17-0x0000000000A00000-0x0000000000A16000-memory.dmp

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memory/2868-0-0x000007FEF5A73000-0x000007FEF5A74000-memory.dmp

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memory/2868-1-0x0000000000F00000-0x0000000000F16000-memory.dmp

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memory/2868-2-0x000007FEF5A70000-0x000007FEF645C000-memory.dmp

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memory/2868-11-0x000007FEF5A70000-0x000007FEF645C000-memory.dmp

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memory/2868-13-0x000007FEF5A70000-0x000007FEF645C000-memory.dmp

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