Malware Analysis Report

2025-05-28 15:16

Sample ID 250519-2bkaesel7w
Target 2025-05-19_05762e74815f254df58070e7b3410754_black-basta_cobalt-strike_hijackloader
SHA256 1b097c4ab07dc3b02f53fdc70e99633fcacc50a9ba90c05a03032cff007ed7f1
Tags
phorphiex discovery loader persistence trojan worm
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V16

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

1b097c4ab07dc3b02f53fdc70e99633fcacc50a9ba90c05a03032cff007ed7f1

Threat Level: Known bad

The file 2025-05-19_05762e74815f254df58070e7b3410754_black-basta_cobalt-strike_hijackloader was found to be: Known bad.

Malicious Activity Summary

phorphiex discovery loader persistence trojan worm

Phorphiex family

Phorphiex payload

Phorphiex, Phorpiex

Downloads MZ/PE file

Executes dropped EXE

Adds Run key to start application

Drops file in Windows directory

Unsigned PE

System Location Discovery: System Language Discovery

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2025-05-19 22:24

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2025-05-19 22:24

Reported

2025-05-19 22:26

Platform

win10v2004-20250502-en

Max time kernel

148s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2025-05-19_05762e74815f254df58070e7b3410754_black-basta_cobalt-strike_hijackloader.exe"

Signatures

Phorphiex family

phorphiex

Phorphiex payload

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

Phorphiex, Phorpiex

worm trojan loader phorphiex

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Windows Settings = "C:\\Windows\\syscrondvr.exe" C:\Users\Admin\AppData\Local\Temp\1799611275.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\syscrondvr.exe C:\Users\Admin\AppData\Local\Temp\1799611275.exe N/A
File opened for modification C:\Windows\syscrondvr.exe C:\Users\Admin\AppData\Local\Temp\1799611275.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\851E.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\1799611275.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\syscrondvr.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\2872912489.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 6008 wrote to memory of 1308 N/A C:\Users\Admin\AppData\Local\Temp\2025-05-19_05762e74815f254df58070e7b3410754_black-basta_cobalt-strike_hijackloader.exe C:\Users\Admin\AppData\Local\Temp\851E.exe
PID 6008 wrote to memory of 1308 N/A C:\Users\Admin\AppData\Local\Temp\2025-05-19_05762e74815f254df58070e7b3410754_black-basta_cobalt-strike_hijackloader.exe C:\Users\Admin\AppData\Local\Temp\851E.exe
PID 6008 wrote to memory of 1308 N/A C:\Users\Admin\AppData\Local\Temp\2025-05-19_05762e74815f254df58070e7b3410754_black-basta_cobalt-strike_hijackloader.exe C:\Users\Admin\AppData\Local\Temp\851E.exe
PID 1308 wrote to memory of 2948 N/A C:\Users\Admin\AppData\Local\Temp\851E.exe C:\Users\Admin\AppData\Local\Temp\1799611275.exe
PID 1308 wrote to memory of 2948 N/A C:\Users\Admin\AppData\Local\Temp\851E.exe C:\Users\Admin\AppData\Local\Temp\1799611275.exe
PID 1308 wrote to memory of 2948 N/A C:\Users\Admin\AppData\Local\Temp\851E.exe C:\Users\Admin\AppData\Local\Temp\1799611275.exe
PID 2948 wrote to memory of 980 N/A C:\Users\Admin\AppData\Local\Temp\1799611275.exe C:\Windows\syscrondvr.exe
PID 2948 wrote to memory of 980 N/A C:\Users\Admin\AppData\Local\Temp\1799611275.exe C:\Windows\syscrondvr.exe
PID 2948 wrote to memory of 980 N/A C:\Users\Admin\AppData\Local\Temp\1799611275.exe C:\Windows\syscrondvr.exe
PID 5604 wrote to memory of 2168 N/A C:\Windows\system32\cmd.exe C:\Windows\syscrondvr.exe
PID 5604 wrote to memory of 2168 N/A C:\Windows\system32\cmd.exe C:\Windows\syscrondvr.exe
PID 5604 wrote to memory of 2168 N/A C:\Windows\system32\cmd.exe C:\Windows\syscrondvr.exe
PID 980 wrote to memory of 5524 N/A C:\Windows\syscrondvr.exe C:\Users\Admin\AppData\Local\Temp\2872912489.exe
PID 980 wrote to memory of 5524 N/A C:\Windows\syscrondvr.exe C:\Users\Admin\AppData\Local\Temp\2872912489.exe
PID 980 wrote to memory of 5524 N/A C:\Windows\syscrondvr.exe C:\Users\Admin\AppData\Local\Temp\2872912489.exe

Processes

C:\Users\Admin\AppData\Local\Temp\2025-05-19_05762e74815f254df58070e7b3410754_black-basta_cobalt-strike_hijackloader.exe

"C:\Users\Admin\AppData\Local\Temp\2025-05-19_05762e74815f254df58070e7b3410754_black-basta_cobalt-strike_hijackloader.exe"

C:\Users\Admin\AppData\Local\Temp\851E.exe

"C:\Users\Admin\AppData\Local\Temp\851E.exe"

C:\Users\Admin\AppData\Local\Temp\1799611275.exe

C:\Users\Admin\AppData\Local\Temp\1799611275.exe

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c C:\Windows\syscrondvr.exe

C:\Windows\syscrondvr.exe

C:\Windows\syscrondvr.exe

C:\Windows\syscrondvr.exe

C:\Windows\syscrondvr.exe

C:\Users\Admin\AppData\Local\Temp\2872912489.exe

C:\Users\Admin\AppData\Local\Temp\2872912489.exe

Network

Country Destination Domain Proto
UA 185.156.72.39:80 185.156.72.39 tcp
IE 23.216.155.171:443 www.bing.com tcp
UA 185.156.72.39:80 185.156.72.39 tcp
UA 185.156.72.39:80 185.156.72.39 tcp
UA 185.156.72.39:80 185.156.72.39 tcp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
NL 45.141.233.6:80 45.141.233.6 tcp
US 8.8.8.8:53 www.update.microsoft.com udp
US 20.109.209.108:80 www.update.microsoft.com tcp
SY 93.113.165.136:40500 udp
MX 189.230.129.21:40500 tcp
IR 212.120.199.18:40500 udp
KZ 95.56.106.27:40500 udp
YE 134.35.238.16:40500 udp
SY 185.209.32.186:40500 udp
US 8.8.8.8:53 c.pki.goog udp
GB 216.58.201.99:80 c.pki.goog tcp
KZ 37.150.50.52:40500 udp
MX 187.194.169.243:40500 tcp
RS 78.109.103.103:40500 udp
CN 113.118.42.68:40500 udp
YE 134.35.166.30:40500 udp
KZ 178.88.150.172:40500 udp
IR 93.115.239.2:40500 udp
PK 175.107.23.34:40500 tcp
UZ 94.141.68.204:40500 udp
KZ 5.76.12.137:40500 udp
KZ 5.251.11.215:40500 udp
UZ 94.230.229.90:40500 udp
UZ 198.163.193.70:40500 udp
BA 5.43.127.65:40500 tcp

Files

C:\Users\Admin\AppData\Local\Temp\851E.exe

MD5 0ec46393976eb51f307cc11d80bae845
SHA1 69d4cb168f3a1b97c37a0ba1519d0adb1ff7e245
SHA256 252171bdaa35d19f872c165e861b03d347a4afb85d7a03d02f8eae09d191038d
SHA512 803351760e3c422e4825103235e13085004b3418b483a2c646aafaef62b7212a1ba4ed28469134a236c5b6121e6a748ba958bbae2dbe4afe9f9f45704928d31f

C:\Users\Admin\AppData\Local\Temp\1799611275.exe

MD5 f30fdbf3448f67cbc3566f31729cb7a6
SHA1 fbf005c38f4a1c2e86817a2cb70406fc241f2c90
SHA256 81783b558904becc5b86553faba9525070de5f43339766eb1c025bcfbfe1eef8
SHA512 b428df2c8f8b4a002c8d7e1bfd9926e5cf95ee998688a2c360b8551e80be5bfbfa17ef210bea35f247da4a5c8a940fb5dba49f4786da9a74e5d001b771c8e9a8

C:\Users\Admin\AppData\Local\Temp\2872912489.exe

MD5 c08cfa523c9377d3ae24fdb373b3ae13
SHA1 5289219770ad28b0fa4f0bdd91817f76bd6be222
SHA256 326c70a965d4e642275c26cd913e268b1db89edd59b31a86ee600a7a9c664eb0
SHA512 c91acd580ac832d5fed363a9a2b98b724a255d82e4fdda6eca62133feb5e60dd79a8caca36597a52bfbfa907a44208c48b15142e2e6020db219d14e970c3f57c