asyncrat | 747957c357cf6fbb4507831926d64211bcea32f767e4262efe275bba99154089

Analysis

max time kernel
1558s
max time network
1799s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
03/05/2024, 01:34

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General

Target
a ton of cumme/cumme - Copy (9).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
behavioral30/files/0x00090000000149f5-16.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2844	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
2140	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2704	timeout.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2884	cumme - Copy (9).exe
2884	cumme - Copy (9).exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2844	cumme.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2884	cumme - Copy (9).exe
Token: SeDebugPrivilege	2844	cumme.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2884 wrote to memory of 2964	2884	cumme - Copy (9).exe	28
PID 2884 wrote to memory of 2964	2884	cumme - Copy (9).exe	28
PID 2884 wrote to memory of 2964	2884	cumme - Copy (9).exe	28
PID 2964 wrote to memory of 2140	2964	cmd.exe	30
PID 2964 wrote to memory of 2140	2964	cmd.exe	30
PID 2964 wrote to memory of 2140	2964	cmd.exe	30
PID 2884 wrote to memory of 2088	2884	cumme - Copy (9).exe	31
PID 2884 wrote to memory of 2088	2884	cumme - Copy (9).exe	31
PID 2884 wrote to memory of 2088	2884	cumme - Copy (9).exe	31
PID 2088 wrote to memory of 2704	2088	cmd.exe	33
PID 2088 wrote to memory of 2704	2088	cmd.exe	33
PID 2088 wrote to memory of 2704	2088	cmd.exe	33
PID 2088 wrote to memory of 2844	2088	cmd.exe	34
PID 2088 wrote to memory of 2844	2088	cmd.exe	34
PID 2088 wrote to memory of 2844	2088	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 (9).exe
"C:\Users\Admin\AppData\Local\Temp\a ton of cumme\cumme - Copy (9).exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2884
- 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:2964
- - 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:2140
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp115F.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2088
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2704
- - 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:2844

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

tmp115F.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp115F.tmp.bat
Size 149B
SHA256 31413faa78ce2503494e845818d773538377f9bc62db45363f806d99fa627366
MD5 6817f2b3df3510b60183df436ed8906e
SHA1 cbf6a55d0328bd793ae5954d3a13a477e7265679
SHA512 2d382c56320f0eab6d5bd62301d4a7b07a9a38d21a7a9dd0974fb8fcd7594033acba2a0a1e5bc776de01f5c68f58e10a36aba21199e2ca75689ee92c7adf2b71
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/2844-17-0x0000000000230000-0x0000000000246000-memory.dmp

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memory/2884-0-0x000007FEF5F13000-0x000007FEF5F14000-memory.dmp

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memory/2884-1-0x0000000000070000-0x0000000000086000-memory.dmp

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memory/2884-2-0x000007FEF5F10000-0x000007FEF68FC000-memory.dmp

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memory/2884-3-0x000007FEF5F10000-0x000007FEF68FC000-memory.dmp

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memory/2884-13-0x000007FEF5F10000-0x000007FEF68FC000-memory.dmp

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