General
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Target
.
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Size
147KB
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Sample
240510-rh483add32
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MD5
3455a5fab8e49aa216d8285e8abeee6b
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SHA1
010a55452220fad311eb189b090e3ac0ada2ad9d
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SHA256
eb701d9ccdf89c1e37e2c08b2b823614f975d3d0be03cb2a73c3798a4637f307
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SHA512
6a2a8aadc7a817a097f929dd758110475ffb65d788d0e7854d3f15f142ff08d98bbae80ae8edceac2f2380d3791707a9b615e8061ebaed2927dde0c65c0f8bbe
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SSDEEP
1536:o6kaad8mvVuCK4Dy1jR4Dllls4PeT30vD932Us4DjHhqiS:lk+m3698ll1gwdHhqiS
Static task
static1
Behavioral task
behavioral1
Sample
.html
Resource
win10v2004-20240426-en
Malware Config
Extracted
crimsonrat
185.136.161.124
Targets
-
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Target
.
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Size
147KB
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MD5
3455a5fab8e49aa216d8285e8abeee6b
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SHA1
010a55452220fad311eb189b090e3ac0ada2ad9d
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SHA256
eb701d9ccdf89c1e37e2c08b2b823614f975d3d0be03cb2a73c3798a4637f307
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SHA512
6a2a8aadc7a817a097f929dd758110475ffb65d788d0e7854d3f15f142ff08d98bbae80ae8edceac2f2380d3791707a9b615e8061ebaed2927dde0c65c0f8bbe
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SSDEEP
1536:o6kaad8mvVuCK4Dy1jR4Dllls4PeT30vD932Us4DjHhqiS:lk+m3698ll1gwdHhqiS
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CrimsonRAT main payload
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Suspicious use of NtCreateProcessExOtherParentProcess
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Modifies boot configuration data using bcdedit
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Downloads MZ/PE file
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Drops file in Drivers directory
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Modifies Installed Components in the registry
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Office macro that triggers on suspicious action
Office document macro which triggers in special circumstances - often malicious.
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Sets service image path in registry
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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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Modifies system executable filetype association
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Registers COM server for autorun
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Unexpected DNS network traffic destination
Network traffic to other servers than the configured DNS servers was detected on the DNS port.
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Adds Run key to start application
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Checks for any installed AV software in registry
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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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Drops desktop.ini file(s)
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Enumerates connected drives
Attempts to read the root path of hard drives other than the default C: drive.
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Legitimate hosting services abused for malware hosting/C2
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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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Checks system information in the registry
System information is often read in order to detect sandboxing environments.
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Drops file in System32 directory
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MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
4Registry Run Keys / Startup Folder
4Event Triggered Execution
1Change Default File Association
1Pre-OS Boot
1Bootkit
1Privilege Escalation
Boot or Logon Autostart Execution
4Registry Run Keys / Startup Folder
4Event Triggered Execution
1Change Default File Association
1Defense Evasion
Modify Registry
6Pre-OS Boot
1Bootkit
1Subvert Trust Controls
1Install Root Certificate
1