asyncrat | 08b0e2870a7fc2dcd71879d84ff235b6f3b27ed5fa2d320a03821d55ce6d6726

General

Target

win7/runtime.exe
Size

73KB
MD5

4fa7b1eec1fc84eb3a13c29e5a37aae7
SHA1

dfff9fceeb4d74d7e82f9f0a65d1889fa0f9e326
SHA256

5f5aa560b9b2d9f7ea3b9a4e05b9b9b35107dc78bd763000fe05f6b3f998f311
SHA512

5e36a5589499a3db56d78de1b66a9ee57a2972bc57bf4b915df9118fd2a584c74ba00c61531d922431b72e87f9c53585c4c1a78a2aba122a22ea5e3603aa06ba
SSDEEP

1536:KIUme0cxdlOH4PAI7Bn3h36rAi8EjZUPMwC/eqmmRhdWVH1bfbfPmjmwzUYbVclN:KIUm3cxdlOH4YI7Bn3h36rAi8EVUPMwv

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.2

Botnet

Default

C2

72.5.43.15:4449

Mutex

yezcydjwbxouz

Attributes

delay
1
install
true
install_file
win.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

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\win.exe	family_asyncrat

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

runtime.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	runtime.exe

Executes dropped EXE 1 IoCs

Processes:

win.exe

pid process

4432 win.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

Processes:

timeout.exe

pid process

1036 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

Processes:

schtasks.exe

pid process

1460 schtasks.exe

pid	process
4432	win.exe

pid	process
1036	timeout.exe

pid	process
1460	schtasks.exe

Suspicious behavior: EnumeratesProcesses 28 IoCs

Processes:

runtime.exewin.exe

pid	process
5000	runtime.exe
5000	runtime.exe
5000	runtime.exe
5000	runtime.exe
5000	runtime.exe
5000	runtime.exe
5000	runtime.exe
5000	runtime.exe
5000	runtime.exe
5000	runtime.exe
5000	runtime.exe
5000	runtime.exe
5000	runtime.exe
5000	runtime.exe
5000	runtime.exe
5000	runtime.exe
5000	runtime.exe
5000	runtime.exe
5000	runtime.exe
5000	runtime.exe
5000	runtime.exe
4432	win.exe
4432	win.exe
4432	win.exe
4432	win.exe
4432	win.exe
4432	win.exe
4432	win.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

runtime.exewin.exe

description pid process

Token: SeDebugPrivilege 5000 runtime.exe
Token: SeDebugPrivilege 4432 win.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

win.exe

pid process

4432 win.exe

description	pid	process
Token: SeDebugPrivilege	5000	runtime.exe
Token: SeDebugPrivilege	4432	win.exe

pid	process
4432	win.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

runtime.execmd.execmd.exe

description	pid	process	target process
PID 5000 wrote to memory of 2584	5000	runtime.exe	cmd.exe
PID 5000 wrote to memory of 2584	5000	runtime.exe	cmd.exe
PID 5000 wrote to memory of 2200	5000	runtime.exe	cmd.exe
PID 5000 wrote to memory of 2200	5000	runtime.exe	cmd.exe
PID 2200 wrote to memory of 1036	2200	cmd.exe	timeout.exe
PID 2200 wrote to memory of 1036	2200	cmd.exe	timeout.exe
PID 2584 wrote to memory of 1460	2584	cmd.exe	schtasks.exe
PID 2584 wrote to memory of 1460	2584	cmd.exe	schtasks.exe
PID 2200 wrote to memory of 4432	2200	cmd.exe	win.exe
PID 2200 wrote to memory of 4432	2200	cmd.exe	win.exe

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\win7\runtime.exe
"C:\Users\Admin\AppData\Local\Temp\win7\runtime.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5000

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "win" /tr '"C:\Users\Admin\AppData\Roaming\win.exe"' & exit
2⤵
- Suspicious use of WriteProcessMemory
PID:2584

C:\Windows\system32\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "win" /tr '"C:\Users\Admin\AppData\Roaming\win.exe"'
3⤵
- Scheduled Task/Job: Scheduled Task
PID:1460

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp4AC4.tmp.bat""
2⤵
- Suspicious use of WriteProcessMemory
PID:2200

C:\Windows\system32\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:1036

C:\Users\Admin\AppData\Roaming\win.exe
"C:\Users\Admin\AppData\Roaming\win.exe"
3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:4432

Network

MITRE ATT&CK Matrix ATT&CK v13

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

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmp4AC4.tmp.bat
Filesize
147B

MD5
def697cdc6ba7aa4ee019db930e726c4

SHA1
e97cef60d5096916270959f512054fd0945dca18

SHA256
10c075350c68fc6f3419a437d86ce5a60eecdedf54e05dd3601470fb8e882244

SHA512
e4a04dde00814e26c36a5a48e6efcd79d287c46d43622440f4eae3ced26ff688c3078b42081427a182dcc257b0bb00a16bafe1cf0f35b52ad250fb0d102d1afe

Download Submit
C:\Users\Admin\AppData\Roaming\MyData\DataLogs.conf
Filesize
8B

MD5
cf759e4c5f14fe3eec41b87ed756cea8

SHA1
c27c796bb3c2fac929359563676f4ba1ffada1f5

SHA256
c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

SHA512
c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

Download Submit
C:\Users\Admin\AppData\Roaming\win.exe
Filesize
73KB

MD5
4fa7b1eec1fc84eb3a13c29e5a37aae7

SHA1
dfff9fceeb4d74d7e82f9f0a65d1889fa0f9e326

SHA256
5f5aa560b9b2d9f7ea3b9a4e05b9b9b35107dc78bd763000fe05f6b3f998f311

SHA512
5e36a5589499a3db56d78de1b66a9ee57a2972bc57bf4b915df9118fd2a584c74ba00c61531d922431b72e87f9c53585c4c1a78a2aba122a22ea5e3603aa06ba

Download Submit
memory/5000-0-0x00007FFE5BD23000-0x00007FFE5BD25000-memory.dmp

Filesize
8KB

Download
memory/5000-1-0x0000000000FD0000-0x0000000000FE8000-memory.dmp

Filesize
96KB

Download
memory/5000-3-0x00007FFE5BD20000-0x00007FFE5C7E1000-memory.dmp

Filesize
10.8MB

Download
memory/5000-8-0x00007FFE5BD20000-0x00007FFE5C7E1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

Loading Replay Monitor...

Downloads