General
- Target index.html
- Size 2KB
- Sample260808-vmrejsee64
- SHA256 e2a146a9e16946ac2d1a0e888065c16ea9d22e3747bac5e59be81a5f9e482c08
- MD5 0513db9a4a603188c34b934a2e83da10
- SHA1 8ad0799cd39ff8b33e31cdbfa1a4671e74fd9a05
- SHA512 5cd9d0b04dd21b9d09e53101f20d2f609122fda8fb1fd2f429db94bbdecce5ccdee5c94c7d376cad0ba814489261e6b22e47d8ef7d8e9284877f4622f620bc05
- TLSH T13D514367869054610370813028D7F196DB65858FC32EE86279AC259D6FC2F7186B75F2
- MD5 SHA1 SHA512 TLSH
Static task
static1
Behavioral task
behavioral1
Sample
index.html
Resource
win10v2004-20260513-en
Behavioral task
behavioral2
Sample
index.html
Resource
win11ltsc2024-20260709-en
Malware Config
Extracted
-
crimsonrat
-
185.136.161.124
Targets
-
- Target index.html
- Size 2KB
- SHA256 e2a146a9e16946ac2d1a0e888065c16ea9d22e3747bac5e59be81a5f9e482c08
- MD5 0513db9a4a603188c34b934a2e83da10
- SHA1 8ad0799cd39ff8b33e31cdbfa1a4671e74fd9a05
- SHA512 5cd9d0b04dd21b9d09e53101f20d2f609122fda8fb1fd2f429db94bbdecce5ccdee5c94c7d376cad0ba814489261e6b22e47d8ef7d8e9284877f4622f620bc05
- TLSH T13D514367869054610370813028D7F196DB65858FC32EE86279AC259D6FC2F7186B75F2
- MD5 SHA1 SHA512 TLSH
Chimera Ransomware Loader DLL
Drops/unpacks executable file which resembles Chimera's Loader.dll.
CrimsonRAT main payload
Family: Chimera
Ransomware which infects local and network files, often distributed via Dropbox links.
Family: Troldesh, Shade, Encoder.858
Troldesh is a ransomware spread by malspam.
Modifies visibility of file extensions in Explorer
UAC bypass
Detects Floxif payload
Renames multiple (3463) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
Drops file in Drivers directory
ACProtect 1.3x - 1.4x DLL software
Detects file using ACProtect software.
Checks computer location settings
Looks up country code configured in the registry, likely geofence.
Executes dropped EXE
Loads dropped DLL
Adds Run key to start application
Checks installed software on the system
Looks up Uninstall key entries in the registry to enumerate software on the system.
Contacts third-party web service commonly abused for C2
Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.
Drops desktop.ini file(s)
Looks up external IP address via web service
Uses a legitimate IP lookup service to find the infected system's external IP.
Writes to the Master Boot Record (MBR)
Bootkits write to the MBR to gain persistence at a level below the operating system.
Executes a VBScript file via the Windows Script Host.
MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
2Visual Basic
1Windows Command Shell
1Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Pre-OS Boot
1Bootkit
1Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Defense Evasion
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Hide Artifacts
1Hidden Files and Directories
1Impair Defenses
1Disable or Modify Tools
1Modify Registry
5Pre-OS Boot
1Bootkit
1Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
1Credentials In Files
1