blackmatter | 3730e9cba4a93bc985ef7cd2368ccbf5eccd4724f514b38b20e320e5553dd08d

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25/03/2025, 13:12

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Analysis

max time kernel
100s
max time network
104s
platform
windows11-21h2_x64
resource
win11-20250314-en
resource tags

arch:x64arch:x86image:win11-20250314-enlocale:en-usos:windows11-21h2-x64system
submitted
25/03/2025, 13:12

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General

Target

out.exe
Size

67KB
MD5

b976d86caac14a71b0326e4da3accced
SHA1

40fcfb07f10a62964ddfe502a9c04c8ebc710ab9
SHA256

a6fbf55fafcf68634bfc24149e0626ee1d8ca9c0e587850d8382436c6abfed9d
SHA512

433d260508326bf4d33a30ce1186bd81c0d6d422f8ddc90f647109714414f89a6230be28d7522a01cc30150b78863bc050119350c48981a83336307ab0c5bfff
SSDEEP

768:YDjahoICS4AIiaVRShxdEe+T0iN2QwdincJ9JGEKvr1Bg2QpXeCggfV:6zICS4AT6GxdEe+TOdincJXvKvQZg

Score

10^/10

blackmatter discovery ransomware

Malware Config

Extracted

Path

C:\OI2eiv6ej.README.txt

Family

blackmatter

Ransom Note

~+ * + ' BLACK | () .-.,='``'=. - o - '=/_ \ | * | '=._ | \ `=./`, ' . '=.__.=' `=' * + Matter + O * ' . >>> What happens? Your network is encrypted, and currently not operational. We have downloaded 1TB from your fileserver. We need only money, after payment we will give you a decryptor for the entire network and you will restore all the data. >>> 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. >> Data leak includes 1. Full emloyeers personal data 2. Network information 3. Schemes of buildings, active project information, architect details and contracts, 4. Finance info >>> How to contact with us? 1. Download and install TOR Browser (https://www.torproject.org/). 2. Open http://supp24yy6a66hwszu2piygicgwzdtbwftb76htfj7vnip3getgqnzxid.onion/7NT6LXKC1XQHW5039BLOV. >>> Warning! Recovery recommendations. We strongly recommend you to do not MODIFY or REPAIR your files, that will damage them.

URLs

http://supp24yy6a66hwszu2piygicgwzdtbwftb76htfj7vnip3getgqnzxid.onion/7NT6LXKC1XQHW5039BLOV

Signatures

BlackMatter Ransomware
BlackMatter ransomware group claims to be Darkside and REvil succesor.
ransomware blackmatter
Blackmatter family
blackmatter
Renames multiple (156) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

Sets desktop wallpaper using registry 2 TTPs 2 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3920535620-1286624088-2946613906-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\OI2eiv6ej.bmp"	out.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3920535620-1286624088-2946613906-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\OI2eiv6ej.bmp"	out.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 6 IoCs

pid	Process
5492	out.exe
5492	out.exe
5492	out.exe
5492	out.exe
5492	out.exe
5492	out.exe

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.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	out.exe

Modifies Control Panel 3 IoCs

defense_evasion

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3920535620-1286624088-2946613906-1000\Control Panel\International	out.exe
Key created	\REGISTRY\USER\S-1-5-21-3920535620-1286624088-2946613906-1000\Control Panel\Desktop	out.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3920535620-1286624088-2946613906-1000\Control Panel\Desktop\WallpaperStyle = "10"	out.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5492	out.exe
5492	out.exe
5492	out.exe
5492	out.exe

Suspicious use of AdjustPrivilegeToken 17 IoCs

description	pid	Process
Token: SeBackupPrivilege	5492	out.exe
Token: SeDebugPrivilege	5492	out.exe
Token: 36	5492	out.exe
Token: SeImpersonatePrivilege	5492	out.exe
Token: SeIncBasePriorityPrivilege	5492	out.exe
Token: SeIncreaseQuotaPrivilege	5492	out.exe
Token: 33	5492	out.exe
Token: SeManageVolumePrivilege	5492	out.exe
Token: SeProfSingleProcessPrivilege	5492	out.exe
Token: SeRestorePrivilege	5492	out.exe
Token: SeSecurityPrivilege	5492	out.exe
Token: SeSystemProfilePrivilege	5492	out.exe
Token: SeTakeOwnershipPrivilege	5492	out.exe
Token: SeShutdownPrivilege	5492	out.exe
Token: SeBackupPrivilege	840	vssvc.exe
Token: SeRestorePrivilege	840	vssvc.exe
Token: SeAuditPrivilege	840	vssvc.exe

Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

C:\Users\Admin\AppData\Local\Temp\out.exe
"C:\Users\Admin\AppData\Local\Temp\out.exe"
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
PID:5492

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:840

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Defacement

T1491

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Downloads

C:\OI2eiv6ej.README.txt

Filesize
1KB

MD5
f66968c47a64569e2281f65a95991be0

SHA1
ef9e3e80bfbea4c3021b226cb8cd00687013b8a8

SHA256
4b950c763006e7c4569df8742855cec31bf82f835bd7e2bdcb5f128db34c82bf

SHA512
cb4ace1b3e891ab100b3950c6bc133b216e91c8978a3af1ffd75617b606bb7ceb0133f44d37a30a827655e5b84b016d736a732f5f37635bb727e1a5b722cad24

Download Submit
memory/5492-0-0x00000000008B0000-0x00000000008C0000-memory.dmp

Filesize
64KB

Download
memory/5492-1-0x00000000008B0000-0x00000000008C0000-memory.dmp

Filesize
64KB

Download