asyncrat | 929bd74e00c56ec0935d5390a89dd4942abc1f3511a267034739fff0491e350b | Triage

Analysis

max time kernel
148s
max time network
144s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
07-12-2024 14:44

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General

Target

3.exe
Size

48KB
MD5

3d9e11f133404b0de3f4fd7e375e3fbf
SHA1

1da48c172f95eb337a3b3427f6360d112abf907e
SHA256

929bd74e00c56ec0935d5390a89dd4942abc1f3511a267034739fff0491e350b
SHA512

77aa948b664f957851bb33d2276df7315d5f05abe912bed1214f6e37270a525799fb04cacd0e17a6c07fff55f96a32222ecf71fcf2104e71de153c64de8f147c
SSDEEP

768:eVVFxILHtFp+BirI7Vf2ki6Y8Yb4gepge+6BvEgK/JYZVc6KN:eV27Eorzbvt6BnkJYZVclN

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

C2

127.0.0.1:8848

127.0.0.1:52039

dfsgmnhsrf23456623423456-52039.portmap.host:8848

dfsgmnhsrf23456623423456-52039.portmap.host:52039

Mutex

DcRatMutex_qwqdanchunxinsfd,mhbm gdfvg

Attributes

delay
1
install
true
install_file
windows defender firewall required.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Asyncrat family
asyncrat

Async RAT payload 1 IoCs

resource	yara_rule
behavioral1/files/0x000b0000000120dc-14.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
1080	windows defender firewall required.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

pid	Process
1712	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

pid	Process
2052	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2976	3.exe
2976	3.exe
2976	3.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2976	3.exe
Token: SeDebugPrivilege	1080	windows defender firewall required.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2976 wrote to memory of 2364	2976	3.exe	30
PID 2976 wrote to memory of 2364	2976	3.exe	30
PID 2976 wrote to memory of 2364	2976	3.exe	30
PID 2976 wrote to memory of 2464	2976	3.exe	32
PID 2976 wrote to memory of 2464	2976	3.exe	32
PID 2976 wrote to memory of 2464	2976	3.exe	32
PID 2464 wrote to memory of 1712	2464	cmd.exe	34
PID 2464 wrote to memory of 1712	2464	cmd.exe	34
PID 2464 wrote to memory of 1712	2464	cmd.exe	34
PID 2364 wrote to memory of 2052	2364	cmd.exe	35
PID 2364 wrote to memory of 2052	2364	cmd.exe	35
PID 2364 wrote to memory of 2052	2364	cmd.exe	35
PID 2464 wrote to memory of 1080	2464	cmd.exe	37
PID 2464 wrote to memory of 1080	2464	cmd.exe	37
PID 2464 wrote to memory of 1080	2464	cmd.exe	37

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\3.exe
"C:\Users\Admin\AppData\Local\Temp\3.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 "windows defender firewall required" /tr '"C:\Users\Admin\AppData\Roaming\windows defender firewall required.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2364
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "windows defender firewall required" /tr '"C:\Users\Admin\AppData\Roaming\windows defender firewall required.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2052
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpC207.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2464
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1712
- - C:\Users\Admin\AppData\Roaming\windows defender firewall required.exe
    "C:\Users\Admin\AppData\Roaming\windows defender firewall required.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:1080

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Scheduled Task

Persistence

Scheduled Task/Job

Scheduled Task

Privilege Escalation

Scheduled Task/Job

Scheduled Task

Defense Evasion

Credential Access

Discovery

Query Registry

System Information Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpC207.tmp.bat

Filesize
178B

MD5
2b4f88067f3f005fd47a17be7b62d3b4

SHA1
1718e195c81e98b94a19c48ec919a80bc14cc7d8

SHA256
3b3dbce8be67a436ab537104f8f8d8ae8da0391c478f8719de0bd79c1a48cf90

SHA512
546129d5e61f1bce97c68aeedd689e08a48b5f346f63856749881f04e0b3f060b8ef2fd83580ce97acf8d34cff34967f5ac495bb6d216f08cd5b4cad2b6545ec

Download Submit
C:\Users\Admin\AppData\Roaming\windows defender firewall required.exe

Filesize
48KB

MD5
3d9e11f133404b0de3f4fd7e375e3fbf

SHA1
1da48c172f95eb337a3b3427f6360d112abf907e

SHA256
929bd74e00c56ec0935d5390a89dd4942abc1f3511a267034739fff0491e350b

SHA512
77aa948b664f957851bb33d2276df7315d5f05abe912bed1214f6e37270a525799fb04cacd0e17a6c07fff55f96a32222ecf71fcf2104e71de153c64de8f147c

Download Submit
memory/1080-16-0x0000000000FE0000-0x0000000000FF2000-memory.dmp

Filesize
72KB

Download
memory/2976-0-0x000007FEF57E3000-0x000007FEF57E4000-memory.dmp

Filesize
4KB

Download
memory/2976-1-0x0000000000BE0000-0x0000000000BF2000-memory.dmp

Filesize
72KB

Download
memory/2976-2-0x000007FEF57E0000-0x000007FEF61CC000-memory.dmp

Filesize
9.9MB

Download
memory/2976-12-0x000007FEF57E0000-0x000007FEF61CC000-memory.dmp

Filesize
9.9MB

Download