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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
May 25, 2023
Severity High Analysis Summary The STOP/DJVU ransomware initially made headlines in 2018 and has since been attacking individuals all around the world. It’s widespread on torrent […]May 24, 2023Severity Medium Analysis Summary CVE-2023-30440 IBM PowerVM Hypervisor could allow a local attacker with control a partition that has been assigned SRIOV virtual function (VF) to […]May 24, 2023Severity High Analysis Summary CVE-2023-33246 Apache RocketMQ could allow a remote attacker to execute arbitrary commands on the system, caused by a flaw when using the […]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
May 25, 2023Severity High Analysis Summary The STOP/DJVU ransomware initially made headlines in 2018 and has since been attacking individuals all around the world. It’s widespread on torrent […]May 24, 2023Severity Medium Analysis Summary CVE-2023-30440 IBM PowerVM Hypervisor could allow a local attacker with control a partition that has been assigned SRIOV virtual function (VF) to […]May 24, 2023Severity High Analysis Summary CVE-2023-33246 Apache RocketMQ could allow a remote attacker to execute arbitrary commands on the system, caused by a flaw when using the […]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 Advisory – Multiple Cisco Identity Services Engine Cross-Site Scripting Vulnerabilities
July 8, 2021Rewterz Threat Advisory – CVE-2021-26115 – FortiWAN OS command injection leads to Privilege Escalation
July 8, 2021
Severity
High
Analysis Summary
Ryuk is the name of a ransomware family, first discovered in the wild in August 2018. It is one of the nastiest ransomware going around. Ryuk will lock your files or systems and holds them hostage for ransom. Ryuk is a type of ransomware used in targeted attacks, where the threat actors make sure that essential files are encrypted so they can ask for large ransom amounts. A typical Ryuk ransom demand can amount to a few hundred thousand dollars. Ryuk is one of the first ransomware families to include the ability to identify and encrypt network drives and resources, as well as delete shadow copies on the endpoint. This means the attackers can then disable Windows System Restore for users, making it impossible to recover from an attack without external backups.
Ryuk’s delivery method is spam emails. These emails are often sent from a spoofed address, so the sender’s name does not raise suspicion.
Impact
- File encryption
- Privilege Escalation
- Information Theft
- Data Exfiltration
- Network Compromise
Indicators of Compromise
MD5
- c0f972c5e033c0b4dc268a805cfa16a2
- 2cc630e080bb8de5faf9f5ae87f43f8b
- 6c0bb20e1158593211a7cbcbacb3dd83
- 89895cf4c88f13e5797aab63dddf1078
- 2a380d0c2aa2234c0a37bdaaaa9489ef
- 45295780f2ba837be42ccf50710bd2b5
- 5c6273b024c93c5bdf557813868f9337
- b1ad9afd96168db991f79eb546d6b79a
- 7364f6222ac58896e8920f32e4d30aac
- 5c6273b024c93c5bdf557813868f9337
- 31db87c5d3b970b42cb577611f851c7a
- 2cc630e080bb8de5faf9f5ae87f43f8b
- 6c0bb20e1158593211a7cbcbacb3dd83
- 89895cf4c88f13e5797aab63dddf1078
- 89895cf4c88f13e5797aab63dddf1078
- 6c0bb20e1158593211a7cbcbacb3dd83
- 5c6273b024c93c5bdf557813868f9337
- 31db87c5d3b970b42cb577611f851c7a
- 2cc630e080bb8de5faf9f5ae87f43f8b
- a5e03a5150537126dffcf2391dfab934
- a5e03a5150537126dffcf2391dfab934
SHA-256
- d8a0d25776c28e17e724da2b1c8fdae28d7c6b32cfa9d3d2a20f3f57ff370488
- d6b7b27e13700aaa7f108bf9e76473717a7a1665198e9aafcc2d2227ca11bba9
- b42d07f0b72879bf21e99f39a21edae1a38c3fd62393bd4e88f1032f561855f9
- 8f368b029a3a5517cb133529274834585d087a2d3a5875d03ea38e5774019c8a
- 63b44f7fe68cb8a05fa98c5acc59851d4b73f5bbd76e9910c94042c523da8d5b
- 60c16e45c5cbe88a38911f1e3176d90444e4884261d8481d4d719acec1bc5025
- 473bcbcba12296b08b765b4f7c2beea5f56f263d5e6c0d15c1006af28f6172e8
- 307a8158e698680c7186e3c1481b29186d8b265bb83662397a54f235b0c9a3d1
- 23e95ba67603234352ff2864dc7fa54742f501e5922f01f8c182dbefc116f97f
- 473bcbcba12296b08b765b4f7c2beea5f56f263d5e6c0d15c1006af28f6172e8
- 703ee3222eccd0e355b9ef414be9153fa3a2ad8efb8176fee887d7744a9f632f
- d6b7b27e13700aaa7f108bf9e76473717a7a1665198e9aafcc2d2227ca11bba9
- b42d07f0b72879bf21e99f39a21edae1a38c3fd62393bd4e88f1032f561855f9
- 8f368b029a3a5517cb133529274834585d087a2d3a5875d03ea38e5774019c8a
- 8f368b029a3a5517cb133529274834585d087a2d3a5875d03ea38e5774019c8a
- b42d07f0b72879bf21e99f39a21edae1a38c3fd62393bd4e88f1032f561855f9
- 473bcbcba12296b08b765b4f7c2beea5f56f263d5e6c0d15c1006af28f6172e8
- 703ee3222eccd0e355b9ef414be9153fa3a2ad8efb8176fee887d7744a9f632f
- d6b7b27e13700aaa7f108bf9e76473717a7a1665198e9aafcc2d2227ca11bba9
- 09a0e87008e34a7a434c5d853600f693ab9de181e1f863ef6a90edf8c3fccd54
SHA1
- a3f38579feb14d3b20289e453b41d88232145f68
- 5a385b8b4b88b6eb93b771b7fbbe190789ef396a
- 3a74a3aafde31b4f129e515baabe9833bf359f8e
- 1efc175983a17bd6c562fe7b054045d6dcb341e5
- 521af7bca33cbbc51892191df09e8fb2fd92c872
- CONFIDENTIAL 4
- f937b1b7b3593a38702f870077658a891974edda
- eafe0287e6ae983c6f1ff68f6c7780cc3a037783
- 9fbfbe72774b9cc3d174daa7b8be76bf8cb57ecf
- 915fd6fb4e20909025f876f3bb453ec52e21b7be
- eafe0287e6ae983c6f1ff68f6c7780cc3a037783
- 8cc6a1f94514033ad8b15c3c4c720fb0eac249f1
- 5a385b8b4b88b6eb93b771b7fbbe190789ef396a
- 3a74a3aafde31b4f129e515baabe9833bf359f8e
- 1efc175983a17bd6c562fe7b054045d6dcb341e5
- 1efc175983a17bd6c562fe7b054045d6dcb341e5
- 3a74a3aafde31b4f129e515baabe9833bf359f8e
- eafe0287e6ae983c6f1ff68f6c7780cc3a037783
- 8cc6a1f94514033ad8b15c3c4c720fb0eac249f1
- 5a385b8b4b88b6eb93b771b7fbbe190789ef396a
- 9a2155e3b5471ca8321e8c74edb277c9a8e756e0
Remediation
- Block all threat indicators at their respective controls.
- Search for IOCs in your environment.