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Severity
Medium
Analysis Summary
Qbot and Lokibot trojans are being deployed using the windows Regsvr32.exe tool also known as LOLBin (living-off-the-land binary). Various types of malicious Microsoft files are being used to spread the malware which are attempting to execute the .OCX files
“During our analysis of these malware samples, we have identified that some of the malware samples belonged to Qbot and Lokibot attempting to execute .OCX files…97 percent of these samples belonged to malicious Microsoft Office documents such as Excel spreadsheet files.” Threat Researchers from Uptycs Labs.
Most of the files found by the researchers are .XLSB or .XLSM files with some being composite documents (.DOCX, .DOC, or .DOCM). LOLBins (Regsvr32) are legitimate tools and therefor much more easier to evade detection. However, specific behaviors can be tracked by security teams:
- Look for parent/child process relationships where Regsvr32 is executed with parent process of Microsoft Word or Microsoft Excel; And, it can be identified by looking for Regsvr32 executions that load the scrobj.dll, which executes a COM scriptlet.
Impact
- Unauthorized Access
- Financial Theft
- Information Theft
Indicators of Compromise
MD5
- 0dc402a72f0a963d5ab34f2981ad75ef
- 940217c5a3e41aa24b3b6c44c80d4b12
- a342af2e40255e71a880ea25d17bb4fb
- c42598d9ac9706b38a48ef7b89bed705
- abebd0ed6fd6c71bf1593efc5eb3312f
- 945d83a418f75a92b49dcc2edfff7bc2
- 2c143cb00ba51e11599d49da287334e3
- 73e183aacd897cf94d2cfbdfd1c760ce
SHA-256
- 77d6239a1082b6dfc5ad9d1c07fcc9610ed933195067e112a0947cb8c149b5d5
- 619b6b570b741c44e962e932f7a5c481ed80d0ecbbd4b206973e62518f005920
- ec69f8bded9b8283ebc2a81975504e23d3abe640f00ea14093711146e6d8ecda
- 6ad9370ba731592762bf0b31c3e1fef164d0618bd435fe5a0cca93e97f3388c3
- 44609be274ceb47badbb35cb9b9bd861a2ca4a0aec9c8348fbabac39816ed73f
- 4dcebe79291eed1106316d13c82e2373457c359dc465072a98559eb1bf1fe7dc
- 957d20eb5a12d027a6a5a26b63664f300a1d656d6e14db312d84bd92fc4eb14f
- 44153c015da5aeb82c7f6266da77407d2b4d76f886d53b88f63bee7ed09b930c
SHA-1
- 88ba0830634d1e2ddb1189731ce6e7e30a62bda5
- 1aeb040fd0132ddde401324104508ba050356599
- 3fddbc9d1c9e0f79ceef6f06579196c0f9f10663
- 5aa8940900c11cc76d963cbcfcc993a3e44b2e0d
- c42533786aeda835eb77ecdb7eb8aaa0bceb0b85
- 402a495d7c1d4c5c4efdd037f3ed5c6301b527a4
- 78fd85ecd417069669cac0de5b653edf2dd27bce
- 246e9725387abd343b7b27a9aaf24b542919eb90
Remediation
- Block all threat indicators at your respective controls.
- Always be suspicious about emails sent by unknown senders.
- Search for IOCs in your environment.