blackmatter | 3730e9cba4a93bc985ef7cd2368ccbf5eccd4724f514b38b20e320e5553dd08d

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
25/03/2025, 13:01

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General

Target

3a7265305386f955adbeb6bd7c711f03395963ac36be82e5bb6b1d7b2034c859.exe
Size

80KB
MD5

e3269531cf93d040b08074bfb31b72a0
SHA1

45b6d89dcea02cc90ae054d72ec80a2eb1036a7e
SHA256

3a7265305386f955adbeb6bd7c711f03395963ac36be82e5bb6b1d7b2034c859
SHA512

e4de5613557ff15f23e2c28763fee6443c81351401974389e1c01cb979efc81c0ff397b85ba3fc6f0204f7c5e0c7617617130d38b441748446e72a0fbb7a12b0
SSDEEP

1536:NE+VYVYMC2F7Aoter2j1lYgpM2HT02F4mHI5PsOqy:2+G3eaj0g+2HT025Hs

Score

10^/10

blackmatter discovery ransomware upx

Malware Config

Extracted

Path

C:\BNuuQUGu2.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

Extracted

Family

blackmatter

Version

1.2

Signatures

BlackMatter Ransomware
BlackMatter ransomware group claims to be Darkside and REvil succesor.
ransomware blackmatter
Blackmatter family
blackmatter
Renames multiple (196) 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-1-5-21-312935884-697965778-3955649944-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\BNuuQUGu2.bmp"	3a7265305386f955adbeb6bd7c711f03395963ac36be82e5bb6b1d7b2034c859.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\BNuuQUGu2.bmp"	3a7265305386f955adbeb6bd7c711f03395963ac36be82e5bb6b1d7b2034c859.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 6 IoCs

pid	Process
2176	3a7265305386f955adbeb6bd7c711f03395963ac36be82e5bb6b1d7b2034c859.exe
2176	3a7265305386f955adbeb6bd7c711f03395963ac36be82e5bb6b1d7b2034c859.exe
2176	3a7265305386f955adbeb6bd7c711f03395963ac36be82e5bb6b1d7b2034c859.exe
2176	3a7265305386f955adbeb6bd7c711f03395963ac36be82e5bb6b1d7b2034c859.exe
2176	3a7265305386f955adbeb6bd7c711f03395963ac36be82e5bb6b1d7b2034c859.exe
2176	3a7265305386f955adbeb6bd7c711f03395963ac36be82e5bb6b1d7b2034c859.exe

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral15/memory/2176-0-0x0000000001120000-0x0000000001137000-memory.dmp	upx
behavioral15/memory/2176-245-0x0000000001120000-0x0000000001137000-memory.dmp	upx

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	3a7265305386f955adbeb6bd7c711f03395963ac36be82e5bb6b1d7b2034c859.exe

Modifies Control Panel 3 IoCs

defense_evasion

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Control Panel\Desktop\WallpaperStyle = "10"	3a7265305386f955adbeb6bd7c711f03395963ac36be82e5bb6b1d7b2034c859.exe
Key created	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Control Panel\International	3a7265305386f955adbeb6bd7c711f03395963ac36be82e5bb6b1d7b2034c859.exe
Key created	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Control Panel\Desktop	3a7265305386f955adbeb6bd7c711f03395963ac36be82e5bb6b1d7b2034c859.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2176	3a7265305386f955adbeb6bd7c711f03395963ac36be82e5bb6b1d7b2034c859.exe
2176	3a7265305386f955adbeb6bd7c711f03395963ac36be82e5bb6b1d7b2034c859.exe
2176	3a7265305386f955adbeb6bd7c711f03395963ac36be82e5bb6b1d7b2034c859.exe
2176	3a7265305386f955adbeb6bd7c711f03395963ac36be82e5bb6b1d7b2034c859.exe

Suspicious use of AdjustPrivilegeToken 17 IoCs

description	pid	Process
Token: SeBackupPrivilege	2176	3a7265305386f955adbeb6bd7c711f03395963ac36be82e5bb6b1d7b2034c859.exe
Token: SeDebugPrivilege	2176	3a7265305386f955adbeb6bd7c711f03395963ac36be82e5bb6b1d7b2034c859.exe
Token: 36	2176	3a7265305386f955adbeb6bd7c711f03395963ac36be82e5bb6b1d7b2034c859.exe
Token: SeImpersonatePrivilege	2176	3a7265305386f955adbeb6bd7c711f03395963ac36be82e5bb6b1d7b2034c859.exe
Token: SeIncBasePriorityPrivilege	2176	3a7265305386f955adbeb6bd7c711f03395963ac36be82e5bb6b1d7b2034c859.exe
Token: SeIncreaseQuotaPrivilege	2176	3a7265305386f955adbeb6bd7c711f03395963ac36be82e5bb6b1d7b2034c859.exe
Token: 33	2176	3a7265305386f955adbeb6bd7c711f03395963ac36be82e5bb6b1d7b2034c859.exe
Token: SeManageVolumePrivilege	2176	3a7265305386f955adbeb6bd7c711f03395963ac36be82e5bb6b1d7b2034c859.exe
Token: SeProfSingleProcessPrivilege	2176	3a7265305386f955adbeb6bd7c711f03395963ac36be82e5bb6b1d7b2034c859.exe
Token: SeRestorePrivilege	2176	3a7265305386f955adbeb6bd7c711f03395963ac36be82e5bb6b1d7b2034c859.exe
Token: SeSecurityPrivilege	2176	3a7265305386f955adbeb6bd7c711f03395963ac36be82e5bb6b1d7b2034c859.exe
Token: SeSystemProfilePrivilege	2176	3a7265305386f955adbeb6bd7c711f03395963ac36be82e5bb6b1d7b2034c859.exe
Token: SeTakeOwnershipPrivilege	2176	3a7265305386f955adbeb6bd7c711f03395963ac36be82e5bb6b1d7b2034c859.exe
Token: SeShutdownPrivilege	2176	3a7265305386f955adbeb6bd7c711f03395963ac36be82e5bb6b1d7b2034c859.exe
Token: SeBackupPrivilege	2800	vssvc.exe
Token: SeRestorePrivilege	2800	vssvc.exe
Token: SeAuditPrivilege	2800	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\3a7265305386f955adbeb6bd7c711f03395963ac36be82e5bb6b1d7b2034c859.exe
"C:\Users\Admin\AppData\Local\Temp\3a7265305386f955adbeb6bd7c711f03395963ac36be82e5bb6b1d7b2034c859.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:2176

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2800

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:\BNuuQUGu2.README.txt

Filesize
1KB

MD5
f66968c47a64569e2281f65a95991be0

SHA1
ef9e3e80bfbea4c3021b226cb8cd00687013b8a8

SHA256
4b950c763006e7c4569df8742855cec31bf82f835bd7e2bdcb5f128db34c82bf

SHA512
cb4ace1b3e891ab100b3950c6bc133b216e91c8978a3af1ffd75617b606bb7ceb0133f44d37a30a827655e5b84b016d736a732f5f37635bb727e1a5b722cad24

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

Filesize
71KB

MD5
83142242e97b8953c386f988aa694e4a

SHA1
833ed12fc15b356136dcdd27c61a50f59c5c7d50

SHA256
d72761e1a334a754ce8250e3af7ea4bf25301040929fd88cf9e50b4a9197d755

SHA512
bb6da177bd16d163f377d9b4c63f6d535804137887684c113cc2f643ceab4f34338c06b5a29213c23d375e95d22ef417eac928822dfb3688ce9e2de9d5242d10

Download Submit
C:\Users\Admin\AppData\Local\Temp\TarE91E.tmp

Filesize
183KB

MD5
109cab5505f5e065b63d01361467a83b

SHA1
4ed78955b9272a9ed689b51bf2bf4a86a25e53fc

SHA256
ea6b7f51e85835c09259d9475a7d246c3e764ad67c449673f9dc97172c351673

SHA512
753a6da5d6889dd52f40208e37f2b8c185805ef81148682b269fff5aa84a46d710fe0ebfe05bce625da2e801e1c26745998a41266fa36bf47bc088a224d730cc

Download Submit
memory/2176-0-0x0000000001120000-0x0000000001137000-memory.dmp

Filesize
92KB

Download
memory/2176-1-0x0000000000CC0000-0x0000000000D00000-memory.dmp

Filesize
256KB

Download
memory/2176-245-0x0000000001120000-0x0000000001137000-memory.dmp

Filesize
92KB

Download