Resubmissions
25/03/2025, 13:19
250325-qkkrrszps51005/02/2025, 11:22
250205-ngk71strbx1025/06/2024, 15:43
240625-s6cz6a1gnj1025/06/2024, 15:17
240625-sn4p6axdma10Analysis
- max time kernel
139s - max time network
203s - platform
windows10-2004_x64 - resource
win10v2004-20250129-en - resource tags
- submitted
05/02/2025, 11:22
General
- Target 706F3EEC328E91FF7F66C8F0A2FB9B556325C153A329A2062DC85879C540839D.exe
- Size 79KB
- Sample250205-ngk71strbx
- SHA256 706f3eec328e91ff7f66c8f0a2fb9b556325c153a329a2062dc85879c540839d
Malware Config
Extracted
-
C:\tK5kEBBkr.README.txt
-
blackmatter
- ~+ * + ' BLACK | () .-.,='``'=. - o - '=/_ \ | * | '=._ | \ `=./`, ' . '=.__.=' `=' * + Matter + O * ' . >>> What happens? Your network is encrypted, and currently not operational. We need only money, after payment we will give you a decryptor for the entire network and you will restore all the data. >>> What data stolen? From your network was stolen 1000 GB of data. If you do not contact us we will publish all your data in our blog and will send it to the biggest mass media. Blog post link: http://blackmax7su6mbwtcyo3xwtpfxpm356jjqrs34y4crcytpw7mifuedyd.onion/72oJjilhMD/6d067a8741848166fa2ac1e69472280c >>> What guarantees? We are not a politically motivated group and we do not need anything other than your money. If you pay, we will provide you the programs for decryption and we will delete your data. If we do not give you decrypters or we do not delete your data, no one will pay us in the future, this does not comply with our goals. We always keep our promises. >> How to contact with us? 1. Download and install TOR Browser (https://www.torproject.org/). 2. Open http://supp24yy6a66hwszu2piygicgwzdtbwftb76htfj7vnip3getgqnzxid.onion/X3452I2VDTHM30QX >> Warning! Recovery recommendations. We strongly recommend you to do not MODIFY or REPAIR your files, that will damage them.
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http://blackmax7su6mbwtcyo3xwtpfxpm356jjqrs34y4crcytpw7mifuedyd.onion/72oJjilhMD/6d067a8741848166fa2ac1e69472280c
-
http://supp24yy6a66hwszu2piygicgwzdtbwftb76htfj7vnip3getgqnzxid.onion/X3452I2VDTHM30QX
Signatures
- BlackMatter Ransomware
BlackMatter ransomware group claims to be Darkside and REvil succesor.
- Blackmatter family
- Renames multiple (112) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
- Sets desktop wallpaper using registry 2 TTPs 2 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 6 IoCs
- System Location Discovery: System Language Discovery 1 TTPs 1 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Modifies Control Panel 3 IoCs
- Suspicious behavior: EnumeratesProcesses 4 IoCs
- Suspicious use of AdjustPrivilegeToken 17 IoCs
- Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
Processes
-
C:\Users\Admin\AppData\Local\Temp\706F3EEC328E91FF7F66C8F0A2FB9B556325C153A329A2062DC85879C540839D.exeC:\Users\Admin\AppData\Local\Temp\706F3EEC328E91FF7F66C8F0A2FB9B556325C153A329A2062DC85879C540839D.exe dsrm -subtree -noprompt -c user"http://+:443"1⤵
- Sets desktop wallpaper using registry
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Modifies Control Panel
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
tK5kEBBkr.README.txt
memory/2908-0-0x00000000026F0000-0x0000000002700000-memory.dmp
memory/2908-1-0x00000000026F0000-0x0000000002700000-memory.dmp