4f117c2022a64e2b28d114c36e0443a6fcee334004b85f4f870112b077368b11

General

Target

2024-05-03_0899f40de23e17d03af1418b76d4f80c_bkransomware.exe
Size

918KB
MD5

0899f40de23e17d03af1418b76d4f80c
SHA1

7245018c4a0ffeb02d0e229dbf5622cd44a54cd9
SHA256

4f117c2022a64e2b28d114c36e0443a6fcee334004b85f4f870112b077368b11
SHA512

5f0bebbe7fd15afb5d94452eaedf24add7bc4156c777e7d78ab7caa620c07634c612b0efb1da60c06bb07ea9d7f95ea620818bf79cb5a639d0e0c0c1dcf2f4f7
SSDEEP

24576:DZNYSmSmoR+d665h7psR35EOUdltP4nLReqZpyZ9tj:DvYSmSm9dx5h7psl5ctP4LDPyfR

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 3 IoCs

pid	Process
4312	s2HZz7etSWWdnwQ.exe
3112	CTS.exe
2204	s2HZz7etSWWdnwQ.exe

Loads dropped DLL 1 IoCs

pid	Process
2204	s2HZz7etSWWdnwQ.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-03_0899f40de23e17d03af1418b76d4f80c_bkransomware.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	CTS.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\CTS.exe	2024-05-03_0899f40de23e17d03af1418b76d4f80c_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4788	2024-05-03_0899f40de23e17d03af1418b76d4f80c_bkransomware.exe
Token: SeDebugPrivilege	3112	CTS.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4788 wrote to memory of 4312	4788	2024-05-03_0899f40de23e17d03af1418b76d4f80c_bkransomware.exe	83
PID 4788 wrote to memory of 4312	4788	2024-05-03_0899f40de23e17d03af1418b76d4f80c_bkransomware.exe	83
PID 4788 wrote to memory of 4312	4788	2024-05-03_0899f40de23e17d03af1418b76d4f80c_bkransomware.exe	83
PID 4788 wrote to memory of 3112	4788	2024-05-03_0899f40de23e17d03af1418b76d4f80c_bkransomware.exe	84
PID 4788 wrote to memory of 3112	4788	2024-05-03_0899f40de23e17d03af1418b76d4f80c_bkransomware.exe	84
PID 4788 wrote to memory of 3112	4788	2024-05-03_0899f40de23e17d03af1418b76d4f80c_bkransomware.exe	84
PID 4312 wrote to memory of 2204	4312	s2HZz7etSWWdnwQ.exe	85
PID 4312 wrote to memory of 2204	4312	s2HZz7etSWWdnwQ.exe	85
PID 4312 wrote to memory of 2204	4312	s2HZz7etSWWdnwQ.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-05-03_0899f40de23e17d03af1418b76d4f80c_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-03_0899f40de23e17d03af1418b76d4f80c_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4788
- C:\Users\Admin\AppData\Local\Temp\s2HZz7etSWWdnwQ.exe
  C:\Users\Admin\AppData\Local\Temp\s2HZz7etSWWdnwQ.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:4312
- - C:\Windows\Temp\{08EDD4C8-0DA9-4954-8D24-149942889509}\.cr\s2HZz7etSWWdnwQ.exe
    "C:\Windows\Temp\{08EDD4C8-0DA9-4954-8D24-149942889509}\.cr\s2HZz7etSWWdnwQ.exe" -burn.clean.room="C:\Users\Admin\AppData\Local\Temp\s2HZz7etSWWdnwQ.exe" -burn.filehandle.attached=696 -burn.filehandle.self=544
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    PID:2204
- C:\Windows\CTS.exe
  "C:\Windows\CTS.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in Windows directory
  - Suspicious use of AdjustPrivilegeToken
  PID:3112

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

1

T1012

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml

Filesize
392KB

MD5
90844b54990973aa01379cae6fa3a3e0

SHA1
0983aedc4380a7b59b38b0a378b9484b080f8644

SHA256
4725c09ca1b9c64cd41e4bdf55a18c2631c98440550b296a405b15c2a1603911

SHA512
b6f83fc0e1e153c149c46b9097544584ca3e21b5fb401f88034adf35b57ff45a112aa0b9f0f3aed39f3cd0be706e67a9eb5e1242f2a57b330221be39561fd0fe

Download Submit
C:\Users\Admin\AppData\Local\Temp\s2HZz7etSWWdnwQ.exe

Filesize
847KB

MD5
29bf0d271cc659ddd598c564e3e9adb5

SHA1
7f21ce21bc79ca6df7a27b0090cdb75be75302d3

SHA256
550962c4268923bf764797577346b6922493b925b8d17565186bf4b74295193c

SHA512
db2a9874aebf6ed6026ee4e8cde71d124706dc269e072d9cbdd715429e4decb84413289eed3f0fbc2ba80a2a25e4f0376dc08f30e1cd566c1974bc84a1535823

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit
C:\Windows\Temp\{4015A92B-770B-467A-BA18-89F7FFAD2405}\.ba\PythonBA.dll

Filesize
650KB

MD5
67c295f6b2a53365885879907f4aca36

SHA1
0c8e4f9e5af43f0f4c9f42b23c9c19a33011c29a

SHA256
560739d8eb7d23641260ac5950e8693d376b1714b6ae1e202e74e7e2216ff961

SHA512
e8eccf168976a86d5a2bd4be4bb05bd8971afa1f2b3fcd460aac7eda431da0b021b96db71be270be433aa4b2347003dc9e69c43a67c0a7422c8b9a21068a8bb9

Download Submit
C:\Windows\Temp\{4015A92B-770B-467A-BA18-89F7FFAD2405}\.ba\SideBar.png

Filesize
50KB

MD5
888eb713a0095756252058c9727e088a

SHA1
c14f69f2bef6bc3e2162b4dd78e9df702d94cdb4

SHA256
79434bd1368f47f08acf6db66638531d386bf15166d78d9bfea4da164c079067

SHA512
7c59f4ada242b19c2299b6789a65a1f34565fed78730c22c904db16a9872fe6a07035c6d46a64ee94501fbcd96de586a8a5303ca22f33da357d455c014820ca0

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads