General
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Target
OInstall.exe
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Size
18.0MB
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Sample
240827-jlj4aszdpf
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MD5
816ed6fdf32a6d2ae153be18ebca59e7
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SHA1
21264678ebd5c879f269ec60564b653dc1052ef4
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SHA256
19b021d9bcf3b0137f2847a3e08826dbc52e88ffe617579b325f14068954db3f
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SHA512
a6579f7fad6fdf59855cdba998764474bf408f441a924ec3c1cd1d1e51ac53a72fdbad75dc44bb06659a5fcb12ec239dc9f43cf32fd6ffe9523e57c5f9e6cf18
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SSDEEP
393216:+CqFTywoCkhfO/zFXGW/F/P9wXiXzTheCeC/+pWt0Ts:+XFTXRkdObGXYzteWMa0o
Static task
static1
Behavioral task
behavioral1
Sample
OInstall.exe
Resource
win7-20240708-en
Behavioral task
behavioral2
Sample
OInstall.exe
Resource
win10v2004-20240802-en
Malware Config
Extracted
https://mrodevicemgr.officeapps.live.com/mrodevicemgrsvc/api/v2/C2RReleaseData
Extracted
http://officecdn.microsoft.com/pr/5030841d-c919-4594-8d2d-84ae4f96e58e/Office/Data/16.0.14332.20763/i640.cab
Extracted
http://officecdn.microsoft.com/pr/5030841d-c919-4594-8d2d-84ae4f96e58e/Office/Data/16.0.14332.20763/i641033.cab
Targets
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Target
OInstall.exe
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Size
18.0MB
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MD5
816ed6fdf32a6d2ae153be18ebca59e7
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SHA1
21264678ebd5c879f269ec60564b653dc1052ef4
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SHA256
19b021d9bcf3b0137f2847a3e08826dbc52e88ffe617579b325f14068954db3f
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SHA512
a6579f7fad6fdf59855cdba998764474bf408f441a924ec3c1cd1d1e51ac53a72fdbad75dc44bb06659a5fcb12ec239dc9f43cf32fd6ffe9523e57c5f9e6cf18
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SSDEEP
393216:+CqFTywoCkhfO/zFXGW/F/P9wXiXzTheCeC/+pWt0Ts:+XFTXRkdObGXYzteWMa0o
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Blocklisted process makes network request
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Event Triggered Execution: Image File Execution Options Injection
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Manipulates Digital Signatures
Attackers can apply techniques such as changing the registry keys of authenticode & Cryptography to obtain their binary as valid.
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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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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Executes dropped EXE
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Loads dropped DLL
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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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Enumerates connected drives
Attempts to read the root path of hard drives other than the default C: drive.
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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
Execution
Command and Scripting Interpreter
1PowerShell
1Scheduled Task/Job
1Scheduled Task
1System Services
1Service Execution
1Persistence
Browser Extensions
1Create or Modify System Process
1Windows Service
1Event Triggered Execution
2Component Object Model Hijacking
1Image File Execution Options Injection
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Create or Modify System Process
1Windows Service
1Event Triggered Execution
2Component Object Model Hijacking
1Image File Execution Options Injection
1Scheduled Task/Job
1Scheduled Task
1Defense Evasion
Impair Defenses
1Indicator Removal
1Clear Persistence
1Modify Registry
3Subvert Trust Controls
1SIP and Trust Provider Hijacking
1