Platform
Managed Security Services
Managed Penetration Testing
Rewterz penetration testing services help organizations determine if a cyber attacker can gain access to their critical assets while giving them detailed insights of the overall business impact of a cyber attack.
Resources
March 17, 2023Severity High Analysis Summary Chaos is a customizable ransomware builder that emerged on June 9 2021 (in underground forums) by falsely marketing itself as the .NET […]March 17, 2023Severity High Analysis Summary CVE-2023-26361 CVSS:4.9 Adobe ColdFusion could allow a remote authenticated attacker to traverse directories on the system. An attacker could send a specially […]March 17, 2023Severity Medium Analysis Summary Ursnif banking trojan also known as Gozi and Dreambot has been around for more than 10 years. It gained popularity in 2015 […]Threat Insights
Before Rewterz got its start, the market was in dire need of a specialized and dedicated information security company. It was nearly impossible for businesses to find a trustworthy provider that could truly cover all of their bases. We wanted to meet this need, giving companies across the globe a chance to get ahead while knowing that their data is in good hands.
Connect with Us
Platform
Managed Security Services
Managed Penetration Testing
Rewterz penetration testing services help organizations determine if a cyber attacker can gain access to their critical assets while giving them detailed insights of the overall business impact of a cyber attack.
Resources
March 17, 2023Severity High Analysis Summary Chaos is a customizable ransomware builder that emerged on June 9 2021 (in underground forums) by falsely marketing itself as the .NET […]March 17, 2023Severity High Analysis Summary CVE-2023-26361 CVSS:4.9 Adobe ColdFusion could allow a remote authenticated attacker to traverse directories on the system. An attacker could send a specially […]March 17, 2023Severity Medium Analysis Summary Ursnif banking trojan also known as Gozi and Dreambot has been around for more than 10 years. It gained popularity in 2015 […]Threat Insights
Before Rewterz got its start, the market was in dire need of a specialized and dedicated information security company. It was nearly impossible for businesses to find a trustworthy provider that could truly cover all of their bases. We wanted to meet this need, giving companies across the globe a chance to get ahead while knowing that their data is in good hands.
Connect with Us
Rewterz Threat Alert – Russian State Hackers are using IoT Devices to Breach Enterprise Networks
August 6, 2019Rewterz Threat Alert – New Version of MegaCortex Ransomware
August 7, 2019
Severity
High
Analysis Summary
GermanWiper is being distributed in Germany through a spam campaign that pretends to be a job applicant named Lena Kretschmer who is submitting their resume.
The emails being sent have the subject “Ihr Stellenangebot – Bewerbung [Your job offer – Application] – Lena Kretschmer” and contain an attachment titled “Unterlagen_Lena_Kretschmer.zip” posing as a document archive.
The attachment contains two files that pretend to be PDF resumes for the sender. Researcher found that these PDFs are actually shortcuts (LNK) that execute a PowerShell command to download an HTA file from the expandingdelegation[.]top site and launch it on the local machine.
How GermanWiper destroys a victim’s data
When GermanWiper is first executed, it terminates processes associated with database and other software so that the files can be accessed and wiping becomes possible. It then scans the system for files to destroy. When wiping files, it skips files that have certain names, extensions, or are located in particular folders.
Impact
Data wipe out
Indicators of Compromise
Filename
- Arbeitszeugnisse_Lena_Kretschmer.pdf.lnk
- Lebenslauf_Lena_Kretschmer.pdf.lnk
- Lena_Kretschmer_Bewerbungsfoto.jpg
- Unterlagen_Lena_Kretschmer.zip
- out-677150039.hta
Malware Hash (MD5/SHA1/SH256)
- 7a0c1477bdde6eef3646fe8e4ba7b68c366ed9b1209799bc5d437a9320878602
- 7a0c1477bdde6eef3646fe8e4ba7b68c366ed9b1209799bc5d437a9320878602
- e08bbf88105c4d06c3eaac07d2885e894015d6e6878dc14260aab4ee87246db0
- 8ecd960adaf6609eb8ed9ed46ccbeeb181d1e32f1cda016cde47e35f9748f716
- 6e7cb518f13564ae5a899d4cef77246eeae12ab1dc73b27d91af028e85232901
- 41364427dee49bf544dcff61a6899b3b7e59852435e4107931e294079a42de7c
Remediation
- Block all threat indicators at your respective controls.
- Always be suspicious about emails sent by unknown senders.
- Never click on the link/attachments sent by unknown senders.