Malware Analysis Report

2025-04-13 12:32

Sample ID 240405-rxzxwsee6z
Target xtPT79JKvvlE.exe
SHA256 a89667a64a05760547dd5b7f8a87181fb145a48ed2492392918e653c7e5bb9a6
Tags
rat promesas new 05 asyncrat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

a89667a64a05760547dd5b7f8a87181fb145a48ed2492392918e653c7e5bb9a6

Threat Level: Known bad

The file xtPT79JKvvlE.exe was found to be: Known bad.

Malicious Activity Summary

rat promesas new 05 asyncrat

Async RAT payload

Asyncrat family

AsyncRat

Deletes itself

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Delays execution with timeout.exe

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2024-04-05 14:35

Signatures

Async RAT payload

rat
Description Indicator Process Target
N/A N/A N/A N/A

Asyncrat family

asyncrat

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-05 14:35

Reported

2024-04-05 14:37

Platform

win7-20240221-en

Max time kernel

121s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\xtPT79JKvvlE.exe"

Signatures

AsyncRat

rat asyncrat

Deletes itself

Description Indicator Process Target
N/A N/A C:\Windows\system32\cmd.exe N/A

Delays execution with timeout.exe

evasion
Description Indicator Process Target
N/A N/A C:\Windows\system32\timeout.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\xtPT79JKvvlE.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\xtPT79JKvvlE.exe

"C:\Users\Admin\AppData\Local\Temp\xtPT79JKvvlE.exe"

C:\Windows\system32\cmd.exe

cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp54CC.tmp.bat""

C:\Windows\system32\timeout.exe

timeout 3

Network

Country Destination Domain Proto
US 8.8.8.8:53 promesasalvaro1.duckdns.org udp
CO 179.13.0.175:7091 promesasalvaro1.duckdns.org tcp
CO 179.13.0.175:7091 promesasalvaro1.duckdns.org tcp

Files

memory/2364-0-0x0000000000990000-0x00000000009A2000-memory.dmp

memory/2364-1-0x000007FEF54B0000-0x000007FEF5E9C000-memory.dmp

memory/2364-2-0x0000000001F60000-0x0000000001FE0000-memory.dmp

memory/2364-20-0x000000001B410000-0x000000001B474000-memory.dmp

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

MD5 29f65ba8e88c063813cc50a4ea544e93
SHA1 05a7040d5c127e68c25d81cc51271ffb8bef3568
SHA256 1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184
SHA512 e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa

C:\Users\Admin\AppData\Local\Temp\Tar54AC.tmp

MD5 435a9ac180383f9fa094131b173a2f7b
SHA1 76944ea657a9db94f9a4bef38f88c46ed4166983
SHA256 67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34
SHA512 1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a

C:\Users\Admin\AppData\Local\Temp\tmp54CC.tmp.bat

MD5 4b08e5044caa4847e5f2dd7f975d5e18
SHA1 d3025efd1e5d2b6c5b383e70e9c4897835174dd8
SHA256 1d5d55a83c03d8d04535219573e30300152d7ed53fde26057f8fec26d79ebee4
SHA512 d589a8cbce77b1315dee5343fe96ba0ef35133090eda0f4eddcce548d54aa071f1fcbf2452781d97fb7009648271d38137e7467d5a2282b93d1ead17f81e74f7

memory/2364-49-0x000007FEF54B0000-0x000007FEF5E9C000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-05 14:35

Reported

2024-04-05 14:37

Platform

win10v2004-20240226-en

Max time kernel

143s

Max time network

155s

Command Line

"C:\Users\Admin\AppData\Local\Temp\xtPT79JKvvlE.exe"

Signatures

AsyncRat

rat asyncrat

Delays execution with timeout.exe

evasion
Description Indicator Process Target
N/A N/A C:\Windows\system32\timeout.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\xtPT79JKvvlE.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1928 wrote to memory of 4352 N/A C:\Users\Admin\AppData\Local\Temp\xtPT79JKvvlE.exe C:\Windows\system32\cmd.exe
PID 1928 wrote to memory of 4352 N/A C:\Users\Admin\AppData\Local\Temp\xtPT79JKvvlE.exe C:\Windows\system32\cmd.exe
PID 4352 wrote to memory of 512 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 4352 wrote to memory of 512 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe

Processes

C:\Users\Admin\AppData\Local\Temp\xtPT79JKvvlE.exe

"C:\Users\Admin\AppData\Local\Temp\xtPT79JKvvlE.exe"

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1408 --field-trial-handle=2744,i,16362475727591565961,3676688664819797550,262144 --variations-seed-version /prefetch:8

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp8013.tmp.bat""

C:\Windows\system32\timeout.exe

timeout 3

Network

Country Destination Domain Proto
US 8.8.8.8:53 123.136.73.23.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 promesasalvaro1.duckdns.org udp
CO 179.13.0.175:7091 promesasalvaro1.duckdns.org tcp
US 8.8.8.8:53 175.0.13.179.in-addr.arpa udp
US 8.8.8.8:53 140.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
GB 172.217.169.74:443 tcp
US 8.8.8.8:53 183.142.211.20.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 65.139.73.23.in-addr.arpa udp
US 13.107.253.64:443 tcp
US 8.8.8.8:53 97.136.73.23.in-addr.arpa udp
US 8.8.8.8:53 121.136.73.23.in-addr.arpa udp
CO 179.13.0.175:7091 promesasalvaro1.duckdns.org tcp
US 8.8.8.8:53 4.173.189.20.in-addr.arpa udp

Files

memory/1928-0-0x0000000000AF0000-0x0000000000B02000-memory.dmp

memory/1928-1-0x00007FF82DA60000-0x00007FF82E521000-memory.dmp

memory/1928-2-0x000000001B7A0000-0x000000001B7B0000-memory.dmp

memory/1928-5-0x00007FF83B470000-0x00007FF83B489000-memory.dmp

memory/1928-6-0x00007FF82DA60000-0x00007FF82E521000-memory.dmp

memory/1928-7-0x000000001B7A0000-0x000000001B7B0000-memory.dmp

memory/1928-8-0x000000001D0F0000-0x000000001D166000-memory.dmp

memory/1928-9-0x000000001D070000-0x000000001D0D4000-memory.dmp

memory/1928-10-0x000000001D0D0000-0x000000001D0EE000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp8013.tmp.bat

MD5 8efe9af2bb80e32d091e046112f68d8f
SHA1 3d455d6bdc876592bc3f484d1fb0e6d78b8e2354
SHA256 75807a0828423669ccec588c1c16d5df453f0ad2d2fe211c483cf7ba6ca2b606
SHA512 d9356eed5b5eeaa908fad4d362895a2e4185732f9c53e3341acd3cdf7809183fd84ec30d87e2a71742e65c065451f076b60fb1b68eba7d38357592dbd1aa0d3b

memory/1928-15-0x00007FF82DA60000-0x00007FF82E521000-memory.dmp

memory/1928-16-0x00007FF83B470000-0x00007FF83B489000-memory.dmp