asyncrat | 747957c357cf6fbb4507831926d64211bcea32f767e4262efe275bba99154089

Analysis

max time kernel
1560s
max time network
1798s
platform
windows7_x64
resource
win7-20240419-en
resource tags

arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
submitted
03/05/2024, 01:34

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General

Target
a ton of cumme/cumme - Copy (17).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
behavioral8/files/0x000b00000001228a-15.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2776	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
2716	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2624	timeout.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2976	cumme - Copy (17).exe
2976	cumme - Copy (17).exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2776	cumme.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2976	cumme - Copy (17).exe
Token: SeDebugPrivilege	2776	cumme.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2976 wrote to memory of 2912	2976	cumme - Copy (17).exe	28
PID 2976 wrote to memory of 2912	2976	cumme - Copy (17).exe	28
PID 2976 wrote to memory of 2912	2976	cumme - Copy (17).exe	28
PID 2912 wrote to memory of 2716	2912	cmd.exe	30
PID 2912 wrote to memory of 2716	2912	cmd.exe	30
PID 2912 wrote to memory of 2716	2912	cmd.exe	30
PID 2976 wrote to memory of 2732	2976	cumme - Copy (17).exe	31
PID 2976 wrote to memory of 2732	2976	cumme - Copy (17).exe	31
PID 2976 wrote to memory of 2732	2976	cumme - Copy (17).exe	31
PID 2732 wrote to memory of 2624	2732	cmd.exe	33
PID 2732 wrote to memory of 2624	2732	cmd.exe	33
PID 2732 wrote to memory of 2624	2732	cmd.exe	33
PID 2732 wrote to memory of 2776	2732	cmd.exe	34
PID 2732 wrote to memory of 2776	2732	cmd.exe	34
PID 2732 wrote to memory of 2776	2732	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 (17).exe
"C:\Users\Admin\AppData\Local\Temp\a ton of cumme\cumme - Copy (17).exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2976
- 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:2912
- - 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:2716
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpBB4.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2732
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2624
- - 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:2776

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

Cab1FF1.tmp

Path C:\Users\Admin\AppData\Local\Temp\Cab1FF1.tmp
Size 68KB
SHA256 1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184
MD5 29f65ba8e88c063813cc50a4ea544e93
SHA1 05a7040d5c127e68c25d81cc51271ffb8bef3568
SHA512 e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa
SSDEEP 1536:iMveRG6BWC7T2g1wGUa5QUoaIB9ttiFJG+AOQOXl0Usvwr:feRG6BX6gUaHo9tkBHiUewr
MD5 SHA1 SHA512 SSDEEP

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tmpBB4.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpBB4.tmp.bat
Size 148B
SHA256 ad7f832075b0799451f608a140dbb47b4ca3bb47d776a99d7b8b2a8ea5f9ecc5
MD5 99342e438b58e35994bd0facd2426a10
SHA1 71d503027e0ffc59942f2b9eb0bd20fa7dfc1017
SHA512 084123e693ea91747aaa6ca17faef50c41cd42b2307dcd8d3852733632c874838796a16b1d6aa29c3535410882752fe4c8c165e8e9f711bedbd719714810db14
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/2776-17-0x0000000000B40000-0x0000000000B56000-memory.dmp

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memory/2976-0-0x000007FEF5613000-0x000007FEF5614000-memory.dmp

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memory/2976-1-0x0000000000F30000-0x0000000000F46000-memory.dmp

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memory/2976-2-0x000007FEF5610000-0x000007FEF5FFC000-memory.dmp

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memory/2976-3-0x000007FEF5610000-0x000007FEF5FFC000-memory.dmp

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memory/2976-12-0x000007FEF5610000-0x000007FEF5FFC000-memory.dmp

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