92a7a301b9468782e1778668a327b6d0453e69bbc82c361ae3c801f9d2044fa0

General

Target

2024-04-30_b7657d8b5532cdf0f436f668c1977f0d_bkransomware.exe
Size

28.0MB
MD5

b7657d8b5532cdf0f436f668c1977f0d
SHA1

7f9133e0be104660de58958e31d02b4a4ad77cc0
SHA256

92a7a301b9468782e1778668a327b6d0453e69bbc82c361ae3c801f9d2044fa0
SHA512

cc0dc4f89eb5db1bd617d75e6af83248547b178c5ff41e0e640c4643faa50edba993aa31c48bc340c996aa36c0ae51fdc8a5d3cad9d554e0c109514fc1966c13
SSDEEP

786432:6cKblg+WzzQDG37Pon6lkFgF7gSw8hrdw6LiesbWq8pizPt:rKbQz0DG3bsNyFxzw6DsL8MzF

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 3 IoCs

pid	Process
2272	keuEjS4dzQoYOYT.exe
2504	CTS.exe
2912	keuEjS4dzQoYOYT.exe

Loads dropped DLL 3 IoCs

pid	Process
1440	2024-04-30_b7657d8b5532cdf0f436f668c1977f0d_bkransomware.exe
2272	keuEjS4dzQoYOYT.exe
2912	keuEjS4dzQoYOYT.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"	2024-04-30_b7657d8b5532cdf0f436f668c1977f0d_bkransomware.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	CTS.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\CTS.exe	2024-04-30_b7657d8b5532cdf0f436f668c1977f0d_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1440	2024-04-30_b7657d8b5532cdf0f436f668c1977f0d_bkransomware.exe
Token: SeDebugPrivilege	2504	CTS.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1440 wrote to memory of 2272	1440	2024-04-30_b7657d8b5532cdf0f436f668c1977f0d_bkransomware.exe	28
PID 1440 wrote to memory of 2272	1440	2024-04-30_b7657d8b5532cdf0f436f668c1977f0d_bkransomware.exe	28
PID 1440 wrote to memory of 2272	1440	2024-04-30_b7657d8b5532cdf0f436f668c1977f0d_bkransomware.exe	28
PID 1440 wrote to memory of 2272	1440	2024-04-30_b7657d8b5532cdf0f436f668c1977f0d_bkransomware.exe	28
PID 1440 wrote to memory of 2272	1440	2024-04-30_b7657d8b5532cdf0f436f668c1977f0d_bkransomware.exe	28
PID 1440 wrote to memory of 2272	1440	2024-04-30_b7657d8b5532cdf0f436f668c1977f0d_bkransomware.exe	28
PID 1440 wrote to memory of 2272	1440	2024-04-30_b7657d8b5532cdf0f436f668c1977f0d_bkransomware.exe	28
PID 1440 wrote to memory of 2504	1440	2024-04-30_b7657d8b5532cdf0f436f668c1977f0d_bkransomware.exe	29
PID 1440 wrote to memory of 2504	1440	2024-04-30_b7657d8b5532cdf0f436f668c1977f0d_bkransomware.exe	29
PID 1440 wrote to memory of 2504	1440	2024-04-30_b7657d8b5532cdf0f436f668c1977f0d_bkransomware.exe	29
PID 1440 wrote to memory of 2504	1440	2024-04-30_b7657d8b5532cdf0f436f668c1977f0d_bkransomware.exe	29
PID 2272 wrote to memory of 2912	2272	keuEjS4dzQoYOYT.exe	30
PID 2272 wrote to memory of 2912	2272	keuEjS4dzQoYOYT.exe	30
PID 2272 wrote to memory of 2912	2272	keuEjS4dzQoYOYT.exe	30
PID 2272 wrote to memory of 2912	2272	keuEjS4dzQoYOYT.exe	30
PID 2272 wrote to memory of 2912	2272	keuEjS4dzQoYOYT.exe	30
PID 2272 wrote to memory of 2912	2272	keuEjS4dzQoYOYT.exe	30
PID 2272 wrote to memory of 2912	2272	keuEjS4dzQoYOYT.exe	30

C:\Users\Admin\AppData\Local\Temp\2024-04-30_b7657d8b5532cdf0f436f668c1977f0d_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-30_b7657d8b5532cdf0f436f668c1977f0d_bkransomware.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1440
- C:\Users\Admin\AppData\Local\Temp\keuEjS4dzQoYOYT.exe
  C:\Users\Admin\AppData\Local\Temp\keuEjS4dzQoYOYT.exe
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:2272
- - C:\Windows\Temp\{A9DE47DB-7E0C-45B9-BD04-686335F14752}\.cr\keuEjS4dzQoYOYT.exe
    "C:\Windows\Temp\{A9DE47DB-7E0C-45B9-BD04-686335F14752}\.cr\keuEjS4dzQoYOYT.exe" -burn.clean.room="C:\Users\Admin\AppData\Local\Temp\keuEjS4dzQoYOYT.exe" -burn.filehandle.attached=180 -burn.filehandle.self=188
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    PID:2912
- 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:2504

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

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit
C:\Windows\Temp\{886C92D3-63FC-4CDF-A363-F054E897F5C9}\.ba\SideBar.png

Filesize
50KB

MD5
888eb713a0095756252058c9727e088a

SHA1
c14f69f2bef6bc3e2162b4dd78e9df702d94cdb4

SHA256
79434bd1368f47f08acf6db66638531d386bf15166d78d9bfea4da164c079067

SHA512
7c59f4ada242b19c2299b6789a65a1f34565fed78730c22c904db16a9872fe6a07035c6d46a64ee94501fbcd96de586a8a5303ca22f33da357d455c014820ca0

Download Submit
\Users\Admin\AppData\Local\Temp\keuEjS4dzQoYOYT.exe

Filesize
27.9MB

MD5
e7062b85c3624af82079794729618eca

SHA1
958fe3e8415aa00b4c3350ef42716321c2fafdeb

SHA256
fb3d0466f3754752ca7fd839a09ffe53375ff2c981279fd4bc23a005458f7f5d

SHA512
05101359d2ec99f562ef6ec604f1c342f3e05ab88cf7ff95dfb272a861a4a7872458d6cf279dd8c2d73e247af71e8e8d80123e435ab76a6363cb28411d0f7706

Download Submit
\Windows\Temp\{886C92D3-63FC-4CDF-A363-F054E897F5C9}\.ba\PythonBA.dll

Filesize
650KB

MD5
67c295f6b2a53365885879907f4aca36

SHA1
0c8e4f9e5af43f0f4c9f42b23c9c19a33011c29a

SHA256
560739d8eb7d23641260ac5950e8693d376b1714b6ae1e202e74e7e2216ff961

SHA512
e8eccf168976a86d5a2bd4be4bb05bd8971afa1f2b3fcd460aac7eda431da0b021b96db71be270be433aa4b2347003dc9e69c43a67c0a7422c8b9a21068a8bb9

Download Submit
\Windows\Temp\{A9DE47DB-7E0C-45B9-BD04-686335F14752}\.cr\keuEjS4dzQoYOYT.exe

Filesize
847KB

MD5
29bf0d271cc659ddd598c564e3e9adb5

SHA1
7f21ce21bc79ca6df7a27b0090cdb75be75302d3

SHA256
550962c4268923bf764797577346b6922493b925b8d17565186bf4b74295193c

SHA512
db2a9874aebf6ed6026ee4e8cde71d124706dc269e072d9cbdd715429e4decb84413289eed3f0fbc2ba80a2a25e4f0376dc08f30e1cd566c1974bc84a1535823

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads