asyncrat | 6c793eaf5b5b700aeed6cad66aa3bff7499bf8b1815cf09d5a39e2403da5dbfd

General

Target
win7/runtime.exe
Size 73KB
Sample240620-dzx97a1ann
SHA256 5f5aa560b9b2d9f7ea3b9a4e05b9b9b35107dc78bd763000fe05f6b3f998f311
MD5 4fa7b1eec1fc84eb3a13c29e5a37aae7
SHA1 dfff9fceeb4d74d7e82f9f0a65d1889fa0f9e326
SHA512 5e36a5589499a3db56d78de1b66a9ee57a2972bc57bf4b915df9118fd2a584c74ba00c61531d922431b72e87f9c53585c4c1a78a2aba122a22ea5e3603aa06ba
SSDEEP 1536:KIUme0cxdlOH4PAI7Bn3h36rAi8EjZUPMwC/eqmmRhdWVH1bfbfPmjmwzUYbVclN:KIUm3cxdlOH4YI7Bn3h36rAi8EVUPMwv
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat default discovery 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

resource	yara_rule
behavioral2/files/0x000a000000023588-10.dat	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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4204450073-1267028356-951339405-1000\Control Panel\International\Geo\Nation	runtime.exe

Executes dropped EXE 1 IoCs

pid	Process
2508	win.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
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
1500	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
3716	schtasks.exe

Suspicious behavior: EnumeratesProcesses 24 IoCs

pid	Process
3268	runtime.exe
3268	runtime.exe
3268	runtime.exe
3268	runtime.exe
3268	runtime.exe
3268	runtime.exe
3268	runtime.exe
3268	runtime.exe
3268	runtime.exe
3268	runtime.exe
3268	runtime.exe
3268	runtime.exe
3268	runtime.exe
3268	runtime.exe
3268	runtime.exe
3268	runtime.exe
3268	runtime.exe
3268	runtime.exe
3268	runtime.exe
3268	runtime.exe
3268	runtime.exe
2508	win.exe
2508	win.exe
2508	win.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3268	runtime.exe
Token: SeDebugPrivilege	2508	win.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2508	win.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3268 wrote to memory of 4216	3268	runtime.exe	86
PID 3268 wrote to memory of 4216	3268	runtime.exe	86
PID 3268 wrote to memory of 3508	3268	runtime.exe	87
PID 3268 wrote to memory of 3508	3268	runtime.exe	87
PID 3508 wrote to memory of 1500	3508	cmd.exe	91
PID 4216 wrote to memory of 3716	4216	cmd.exe	90
PID 4216 wrote to memory of 3716	4216	cmd.exe	90
PID 3508 wrote to memory of 1500	3508	cmd.exe	91
PID 3508 wrote to memory of 2508	3508	cmd.exe	98
PID 3508 wrote to memory of 2508	3508	cmd.exe	98

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:3268
- 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:4216
- - 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:3716
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp5748.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3508
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1500
- - 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:2508

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

3

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

tmp5748.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp5748.tmp.bat
Size 147B
SHA256 723ecc5067dc5e5dbcc9f7ee48733ae7671f8de33a84c3617020b7a8226cb8cd
MD5 22f178b1b0ca5b1a4a9c48a48da83bc1
SHA1 eb23d0b23f51ea9a000ff1b22d3b494c2c0e3d50
SHA512 167f9cacdc66a98faf142563a97be55a6e18814d16e436ec74070da0e7206964c1f356c1b7aedcfcad634405912b3683d27303d21181b4119e634c0887ad7316
MD5 SHA1 SHA512

Submit Download

DataLogs.conf

Path C:\Users\Admin\AppData\Roaming\MyData\DataLogs.conf
Size 8B
SHA256 c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761
MD5 cf759e4c5f14fe3eec41b87ed756cea8
SHA1 c27c796bb3c2fac929359563676f4ba1ffada1f5
SHA512 c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b
MD5 SHA1 SHA512

Submit Download

win.exe

Path C:\Users\Admin\AppData\Roaming\win.exe
Size 73KB
SHA256 5f5aa560b9b2d9f7ea3b9a4e05b9b9b35107dc78bd763000fe05f6b3f998f311
MD5 4fa7b1eec1fc84eb3a13c29e5a37aae7
SHA1 dfff9fceeb4d74d7e82f9f0a65d1889fa0f9e326
SHA512 5e36a5589499a3db56d78de1b66a9ee57a2972bc57bf4b915df9118fd2a584c74ba00c61531d922431b72e87f9c53585c4c1a78a2aba122a22ea5e3603aa06ba
SSDEEP 1536:KIUme0cxdlOH4PAI7Bn3h36rAi8EjZUPMwC/eqmmRhdWVH1bfbfPmjmwzUYbVclN:KIUm3cxdlOH4YI7Bn3h36rAi8EVUPMwv
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/3268-0-0x00007FFF9AD93000-0x00007FFF9AD95000-memory.dmp

Download

memory/3268-1-0x0000000000DE0000-0x0000000000DF8000-memory.dmp

Download

memory/3268-3-0x00007FFF9AD90000-0x00007FFF9B851000-memory.dmp

Download

memory/3268-15-0x00007FFF9AD90000-0x00007FFF9B851000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads