General
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Target
MBSetup.exe
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Size
2.6MB
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Sample
241029-cqhygashrl
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MD5
6b3b44639456a3230e3838d0d2202939
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SHA1
6aa554f51497c21d684d80fdf363e23b8f1f28f2
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SHA256
eedb91d5c57418231eaf086f3739353392fa83267075bc50de2cabd11db66c1f
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SHA512
fab38b9b7d587aed6f2ab267cf9afa878213832b86cc00519e0cf5880072aa95516796131afe87d641fe113f2041eef52988845df15b716330de0080bf5ccfea
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SSDEEP
49152:gXVmyjkeKRLbRHkqvlStQyfvE0Z3R0nxiIq2dsuH+Dj3IbmMB:gXVRjkeKRfrKtQRq2tEMB
Static task
static1
Behavioral task
behavioral1
Sample
MBSetup.exe
Resource
win11-20241007-en
Malware Config
Targets
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Target
MBSetup.exe
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Size
2.6MB
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MD5
6b3b44639456a3230e3838d0d2202939
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SHA1
6aa554f51497c21d684d80fdf363e23b8f1f28f2
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SHA256
eedb91d5c57418231eaf086f3739353392fa83267075bc50de2cabd11db66c1f
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SHA512
fab38b9b7d587aed6f2ab267cf9afa878213832b86cc00519e0cf5880072aa95516796131afe87d641fe113f2041eef52988845df15b716330de0080bf5ccfea
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SSDEEP
49152:gXVmyjkeKRLbRHkqvlStQyfvE0Z3R0nxiIq2dsuH+Dj3IbmMB:gXVRjkeKRfrKtQRq2tEMB
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Jigsaw Ransomware
Ransomware family first created in 2016. Named based on wallpaper set after infection in the early versions.
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Jigsaw family
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Process spawned unexpected child process
This typically indicates the parent process was compromised via an exploit or macro.
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Suspicious use of NtCreateUserProcessOtherParentProcess
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Renames multiple (1512) 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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Modifies RDP port number used by Windows
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Sets service image path in registry
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Checks BIOS information in registry
BIOS information is often read in order to detect sandboxing environments.
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Credentials from Password Stores: Windows Credential Manager
Suspicious access to Credentials History.
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Impair Defenses: Safe Mode Boot
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Adds Run key to start application
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Boot or Logon Autostart Execution: Active Setup
Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.
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Downloads MZ/PE file
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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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Boot or Logon Autostart Execution: Authentication Package
Suspicious Windows Authentication Registry Modification.
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Drops file in System32 directory
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Event Triggered Execution: Component Object Model Hijacking
Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.
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Modifies WinLogon for persistence
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MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
5Active Setup
1Authentication Package
1Registry Run Keys / Startup Folder
2Winlogon Helper DLL
1Event Triggered Execution
1Component Object Model Hijacking
1Privilege Escalation
Boot or Logon Autostart Execution
5Active Setup
1Authentication Package
1Registry Run Keys / Startup Folder
2Winlogon Helper DLL
1Event Triggered Execution
1Component Object Model Hijacking
1Defense Evasion
Impair Defenses
1Safe Mode Boot
1Modify Registry
6Subvert Trust Controls
2Install Root Certificate
1SIP and Trust Provider Hijacking
1Credential Access
Credentials from Password Stores
2Credentials from Web Browsers
1Windows Credential Manager
1Unsecured Credentials
1Credentials In Files
1