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/0x0009000000016de9-15.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2816	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
2692	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
1576	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2848	newClient.exe
2848	newClient.exe
2848	newClient.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2848	newClient.exe
Token: SeDebugPrivilege	2816	windows defender firewall.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2848 wrote to memory of 1148	2848	newClient.exe	31
PID 2848 wrote to memory of 1148	2848	newClient.exe	31
PID 2848 wrote to memory of 1148	2848	newClient.exe	31
PID 1148 wrote to memory of 1576	1148	cmd.exe	33
PID 1148 wrote to memory of 1576	1148	cmd.exe	33
PID 1148 wrote to memory of 1576	1148	cmd.exe	33
PID 2848 wrote to memory of 2320	2848	newClient.exe	34
PID 2848 wrote to memory of 2320	2848	newClient.exe	34
PID 2848 wrote to memory of 2320	2848	newClient.exe	34
PID 2320 wrote to memory of 2692	2320	cmd.exe	36
PID 2320 wrote to memory of 2692	2320	cmd.exe	36
PID 2320 wrote to memory of 2692	2320	cmd.exe	36
PID 2320 wrote to memory of 2816	2320	cmd.exe	37
PID 2320 wrote to memory of 2816	2320	cmd.exe	37
PID 2320 wrote to memory of 2816	2320	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\newClient.exe
"C:\Users\Admin\AppData\Local\Temp\newClient.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2848
- 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:1148
- - 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:1576
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpDBED.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2320
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2692
- - 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:2816

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\tmpDBED.tmp.bat

Filesize
169B

MD5
8da758506c4d1c379518a33a0e31ec08

SHA1
5a84f1e5b17ed3e21e54c8a46adc564876939ead

SHA256
1d3d87cf91efc7767b969967b4011fba4309f5fe306eb7b2b604341f9abbef47

SHA512
64516d111b040f0109fb1cdd49fffa41560ca361d563b0ea26d03069444e1a3ffb72a429ed5d4b5fd71d7165084acf439ffe545794c733a8887900e92d2cd7e6

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

Filesize
63KB

MD5
850f69a366c31db03ec8712b336f9fbd

SHA1
9afdce442ef056c44cab85027b80d0f56bb65f79

SHA256
1ad7ca994dc657ad56db324539251cacc030481d894351dd9e28575afd67c265

SHA512
ef7014b9d8fb39dabea401d7acc9fd9c55c6aa1900c47743f6ae733dc71a2feaee5eccec0148bd6b9bb9edef681f9d5c0ac1c3d872b7cd02941047920731b28b

Download Submit
memory/2816-17-0x0000000000240000-0x0000000000256000-memory.dmp

Filesize
88KB

Download
memory/2848-0-0x000007FEF5BE3000-0x000007FEF5BE4000-memory.dmp

Filesize
4KB

Download
memory/2848-1-0x0000000000050000-0x0000000000066000-memory.dmp

Filesize
88KB

Download
memory/2848-2-0x000007FEF5BE0000-0x000007FEF65CC000-memory.dmp

Filesize
9.9MB

Download
memory/2848-3-0x000007FEF5BE0000-0x000007FEF65CC000-memory.dmp

Filesize
9.9MB

Download
memory/2848-13-0x000007FEF5BE0000-0x000007FEF65CC000-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