asyncrat | 0692762b3a078c6571c03619c47d0d99d1a8bd5140b020599030dee87ff5ddeb

General

Target
0692762b3a078c6571c03619c47d0d99d1a8bd5140b020599030dee87ff5ddebN.exe
Size 1.0MB
Sample241026-hs54nsseqj
SHA256 0692762b3a078c6571c03619c47d0d99d1a8bd5140b020599030dee87ff5ddeb
MD5 5e36f165ec29ff376a24bcb5b31fcb20
SHA1 f2ebb0e38ff62d9d67c87a7f1ba174de857efd7e
SHA512 0494c0029bd7763bf2a584cca47e8c860673843a3586b2d6fb1ff93ebfd562f7ae53b8aebf217554655956d081080a38eb6cba94bfbe127dffeee3dcc50e0d60
SSDEEP 24576:b062cSEk8zNlL5nplsZqxTbJq5LWByCsctdcyoQUGd8Lh+Jo:A6PadqxZKLgyEtdch7d+Jo
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat venomrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

C2

91.107.210.50:4449

Mutex

32234435ertysdfghhg54

Attributes

delay
1
install
true
install_file
admin.exe
install_folder
%Temp%

aes.plain

Signatures

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

VenomRAT 1 IoCs

Detects VenomRAT.

rat

resource	yara_rule
behavioral2/memory/2520-10-0x000001C829C80000-0x000001C829C98000-memory.dmp	VenomRAT

Venomrat family
venomrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/memory/2520-10-0x000001C829C80000-0x000001C829C98000-memory.dmp	family_asyncrat

Checks computer location settings 2 TTPs 3 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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	0692762b3a078c6571c03619c47d0d99d1a8bd5140b020599030dee87ff5ddebN.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	encrypted.exe

Executes dropped EXE 2 IoCs

pid	Process
2520	encrypted.exe
1492	admin.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	0692762b3a078c6571c03619c47d0d99d1a8bd5140b020599030dee87ff5ddebN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
544	timeout.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings	0692762b3a078c6571c03619c47d0d99d1a8bd5140b020599030dee87ff5ddebN.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
4072	schtasks.exe

Suspicious behavior: EnumeratesProcesses 30 IoCs

pid	Process
2520	encrypted.exe
2520	encrypted.exe
2520	encrypted.exe
2520	encrypted.exe
2520	encrypted.exe
2520	encrypted.exe
2520	encrypted.exe
2520	encrypted.exe
2520	encrypted.exe
2520	encrypted.exe
2520	encrypted.exe
2520	encrypted.exe
2520	encrypted.exe
2520	encrypted.exe
2520	encrypted.exe
2520	encrypted.exe
2520	encrypted.exe
2520	encrypted.exe
2520	encrypted.exe
2520	encrypted.exe
2520	encrypted.exe
2520	encrypted.exe
2520	encrypted.exe
1492	admin.exe
1492	admin.exe
1492	admin.exe
1492	admin.exe
1492	admin.exe
1492	admin.exe
1492	admin.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2520	encrypted.exe
Token: SeDebugPrivilege	1492	admin.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1492	admin.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2152 wrote to memory of 3572	2152	0692762b3a078c6571c03619c47d0d99d1a8bd5140b020599030dee87ff5ddebN.exe	84
PID 2152 wrote to memory of 3572	2152	0692762b3a078c6571c03619c47d0d99d1a8bd5140b020599030dee87ff5ddebN.exe	84
PID 2152 wrote to memory of 3572	2152	0692762b3a078c6571c03619c47d0d99d1a8bd5140b020599030dee87ff5ddebN.exe	84
PID 3572 wrote to memory of 2520	3572	WScript.exe	87
PID 3572 wrote to memory of 2520	3572	WScript.exe	87
PID 2520 wrote to memory of 3836	2520	encrypted.exe	89
PID 2520 wrote to memory of 3836	2520	encrypted.exe	89
PID 2520 wrote to memory of 216	2520	encrypted.exe	91
PID 2520 wrote to memory of 216	2520	encrypted.exe	91
PID 216 wrote to memory of 544	216	cmd.exe	93
PID 216 wrote to memory of 544	216	cmd.exe	93
PID 3836 wrote to memory of 4072	3836	cmd.exe	94
PID 3836 wrote to memory of 4072	3836	cmd.exe	94
PID 216 wrote to memory of 1492	216	cmd.exe	99
PID 216 wrote to memory of 1492	216	cmd.exe	99

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\0692762b3a078c6571c03619c47d0d99d1a8bd5140b020599030dee87ff5ddebN.exe
"C:\Users\Admin\AppData\Local\Temp\0692762b3a078c6571c03619c47d0d99d1a8bd5140b020599030dee87ff5ddebN.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2152
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\RarSFX0\run.vbs"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3572
- - C:\Users\Admin\AppData\Local\Temp\RarSFX0\encrypted.exe
    "C:\Users\Admin\AppData\Local\Temp\RarSFX0\encrypted.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2520
  - - C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "admin" /tr '"C:\Users\Admin\AppData\Local\Temp\admin.exe"' & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3836
    - - C:\Windows\system32\schtasks.exe
        
        schtasks /create /f /sc onlogon /rl highest /tn "admin" /tr '"C:\Users\Admin\AppData\Local\Temp\admin.exe"'
        5⤵
        Scheduled Task/Job: Scheduled Task
        
        PID:4072
  - - C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpC9D8.tmp.bat""
      4⤵
      Suspicious use of WriteProcessMemory
      PID:216
    - - C:\Windows\system32\timeout.exe
        
        timeout 3
        5⤵
        Delays execution with timeout.exe
        
        PID:544
    - - C:\Users\Admin\AppData\Local\Temp\admin.exe
        
        "C:\Users\Admin\AppData\Local\Temp\admin.exe"
        5⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of SetWindowsHookEx
        
        PID:1492

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

2

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

encrypted.exe

Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\encrypted.exe
Size 1.6MB
SHA256 6c5c6fc8dbb64441444722f0db56690f4c8f9f72ce675810ff373ffca53e0926
MD5 3e0f09b83c11ecfd807207cbbd70a901
SHA1 3df06d7926e0c022ffccc31069dfc26868d55c73
SHA512 d0c79ea3d68cb87529abadede0bdeda05b47900a9961a1d8ca4ffcb421b3e2bcc21f3fc7c8a8fbd175e54bdc8e94ce94b1deab26d411535c82433e52b997569d
SSDEEP 24576:2tm8qL0bt3MUnMmbk1UVUZl/vMBf+uR9SJQIxj6/3iA:2tmbL0bt3MnW+HRxGS
MD5 SHA1 SHA512 SSDEEP

Submit Download

run.vbs

Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\run.vbs
Size 190B
SHA256 e5c84ef4a1599f6f8130f70109bba6e6ba04439d10601c06834e36d31012f8e1
MD5 99b17143c77785dec72b12bf9fde7389
SHA1 fe803b2b32e187644433795fd26798122dc284fe
SHA512 49282594bde69abe29c01f866371dbb0b3eb2b46c6108a1e86e25a612afed4d74aa92ed930cde0c19c1696602730ac2df38b8dd3f4798eb763ade9c1c2ab2e4d
MD5 SHA1 SHA512

Submit Download

tmpC9D8.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpC9D8.tmp.bat
Size 152B
SHA256 027b6977d8969d1e9973723008e815cd1621bdb2dca560788ddf54d6cd832403
MD5 81edc4e55fc82a147ebb89ab4d24b2bf
SHA1 64dab94d9eac3413f38ba73548fb01a1ce54ab27
SHA512 db0bab2db0be29a754c42248704049f6f8949c76b69e65d88d10c030dde1878abaa783c37729901ada4c1520318ab153d7f0ed805c52d523d7ba88547c409e93
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

memory/2520-9-0x0000018793780000-0x000001879379B000-memory.dmp

Download

memory/2520-10-0x000001C829C80000-0x000001C829C98000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads