asyncrat | 1ad7ca994dc657ad56db324539251cacc030481d894351dd9e28575afd67c265

General

Target

newClient.exe
Size

63KB
MD5

850f69a366c31db03ec8712b336f9fbd
SHA1

9afdce442ef056c44cab85027b80d0f56bb65f79
SHA256

1ad7ca994dc657ad56db324539251cacc030481d894351dd9e28575afd67c265
SHA512

ef7014b9d8fb39dabea401d7acc9fd9c55c6aa1900c47743f6ae733dc71a2feaee5eccec0148bd6b9bb9edef681f9d5c0ac1c3d872b7cd02941047920731b28b
SSDEEP

1536:F8iDBlH6vPpRjK0GbbRwVHv+Kr7qG7FZVclN:amlH6vPLjnGbbR62KPzY

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

C2

127.0.0.1:7707

127.0.0.1:31576

yeswasdwasdwasd-31576.portmap.host:7707

yeswasdwasdwasd-31576.portmap.host:31576

Mutex

roaroaroaraoroaroaraoraoraoarororrohrorororoaroaaoaoaoaroaroar

Attributes

delay
1
install
true
install_file
windows defender firewall.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

rat

resource	yara_rule
behavioral1/files/0x000b00000001225c-15.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2136	windows defender firewall.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

evasion

pid	Process
2656	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

T1053.005

pid	Process
2900	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2208	newClient.exe
2208	newClient.exe
2208	newClient.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2208	newClient.exe
Token: SeDebugPrivilege	2136	windows defender firewall.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2208 wrote to memory of 2456	2208	newClient.exe	30
PID 2208 wrote to memory of 2456	2208	newClient.exe	30
PID 2208 wrote to memory of 2456	2208	newClient.exe	30
PID 2208 wrote to memory of 2888	2208	newClient.exe	32
PID 2208 wrote to memory of 2888	2208	newClient.exe	32
PID 2208 wrote to memory of 2888	2208	newClient.exe	32
PID 2456 wrote to memory of 2900	2456	cmd.exe	33
PID 2456 wrote to memory of 2900	2456	cmd.exe	33
PID 2456 wrote to memory of 2900	2456	cmd.exe	33
PID 2888 wrote to memory of 2656	2888	cmd.exe	35
PID 2888 wrote to memory of 2656	2888	cmd.exe	35
PID 2888 wrote to memory of 2656	2888	cmd.exe	35
PID 2888 wrote to memory of 2136	2888	cmd.exe	36
PID 2888 wrote to memory of 2136	2888	cmd.exe	36
PID 2888 wrote to memory of 2136	2888	cmd.exe	36

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\newClient.exe
"C:\Users\Admin\AppData\Local\Temp\newClient.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2208
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "windows defender firewall" /tr '"C:\Users\Admin\AppData\Roaming\windows defender firewall.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2456
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "windows defender firewall" /tr '"C:\Users\Admin\AppData\Roaming\windows defender firewall.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2900
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp8066.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2888
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2656
- - C:\Users\Admin\AppData\Roaming\windows defender firewall.exe
    "C:\Users\Admin\AppData\Roaming\windows defender firewall.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:2136

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp8066.tmp.bat

Filesize
169B

MD5
3e9ef259253a93212b30eed9d2c53e87

SHA1
3eca97a9a2f199c851c840616c724f39619c97c8

SHA256
60f63794e9c82325b1836ff0e95beb49821d72bff36a3787fe41e17fc71345e1

SHA512
c59701fc6f0d31a155180336dfbeb54cf25fadbe58dd7b45a11ed2e1b5a7ec2946be93e56adde840c351b606a12d1cbe21ed8a6ec888b4530f256729e552aa48

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

Filesize
63KB

MD5
850f69a366c31db03ec8712b336f9fbd

SHA1
9afdce442ef056c44cab85027b80d0f56bb65f79

SHA256
1ad7ca994dc657ad56db324539251cacc030481d894351dd9e28575afd67c265

SHA512
ef7014b9d8fb39dabea401d7acc9fd9c55c6aa1900c47743f6ae733dc71a2feaee5eccec0148bd6b9bb9edef681f9d5c0ac1c3d872b7cd02941047920731b28b

Download Submit
memory/2136-17-0x0000000000CE0000-0x0000000000CF6000-memory.dmp

Filesize
88KB

Download
memory/2208-0-0x000007FEF5EB3000-0x000007FEF5EB4000-memory.dmp

Filesize
4KB

Download
memory/2208-1-0x00000000001E0000-0x00000000001F6000-memory.dmp

Filesize
88KB

Download
memory/2208-2-0x000007FEF5EB0000-0x000007FEF689C000-memory.dmp

Filesize
9.9MB

Download
memory/2208-3-0x000007FEF5EB0000-0x000007FEF689C000-memory.dmp

Filesize
9.9MB

Download
memory/2208-12-0x000007FEF5EB0000-0x000007FEF689C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads