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
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Family: Chimera
Ransomware which infects local and network files, often distributed via Dropbox links.
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Family: Troldesh, Shade, Encoder.858
Troldesh is a ransomware spread by malspam.
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Modifies visibility of file extensions in Explorer
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UAC bypass
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Detects Floxif payload
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Renames multiple (3463) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Drops file in Drivers directory
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ACProtect 1.3x - 1.4x DLL software
Detects file using ACProtect software.
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Executes dropped EXE
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Loads dropped DLL
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Adds Run key to start application
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Checks installed software on the system
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Contacts third-party web service commonly abused for C2
Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.
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Drops desktop.ini file(s)
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Looks up external IP address via web service
Uses a legitimate IP lookup service to find the infected system's external IP.
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Writes to the Master Boot Record (MBR)
Bootkits write to the MBR to gain persistence at a level below the operating system.
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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