744748e93af9462359490c1982181f838ba70332cb9deb6f3635d5b69d13dad8

General

Target

2024-04-28_ec1f6305e06564efb9b8552327f8eed2_bkransomware.exe
Size

28.0MB
MD5

ec1f6305e06564efb9b8552327f8eed2
SHA1

422d90377a959278be55158f42fdaec16af925db
SHA256

744748e93af9462359490c1982181f838ba70332cb9deb6f3635d5b69d13dad8
SHA512

ed5e580e733bcd858ec54c0e63d6836c6e1415717f50c720b9567c55f9494b52c4daaffc64428d20a4c525be5725930dba51a7cc3f044cd37aef24c68bbe288d
SSDEEP

786432:mNSx9bbKv4/4Ezdsh/Z+m+OWGWIuoaMheuY3gmq11t:mNSx1Kv4AEpU/Zporo0ux3D

Score

7^/10

discovery persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 3 IoCs

Processes:

eMZ5tmJ8mqZrvku.exeCTS.exeeMZ5tmJ8mqZrvku.exe

pid process

4720 eMZ5tmJ8mqZrvku.exe
2860 CTS.exe
1408 eMZ5tmJ8mqZrvku.exe
Loads dropped DLL 1 IoCs

Processes:

eMZ5tmJ8mqZrvku.exe

pid process

1408 eMZ5tmJ8mqZrvku.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

pid	process
4720	eMZ5tmJ8mqZrvku.exe
2860	CTS.exe
1408	eMZ5tmJ8mqZrvku.exe

pid	process
1408	eMZ5tmJ8mqZrvku.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

CTS.exe2024-04-28_ec1f6305e06564efb9b8552327f8eed2_bkransomware.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	CTS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-04-28_ec1f6305e06564efb9b8552327f8eed2_bkransomware.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

Processes:

2024-04-28_ec1f6305e06564efb9b8552327f8eed2_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_ec1f6305e06564efb9b8552327f8eed2_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_ec1f6305e06564efb9b8552327f8eed2_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 5004 2024-04-28_ec1f6305e06564efb9b8552327f8eed2_bkransomware.exe
Token: SeDebugPrivilege 2860 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_ec1f6305e06564efb9b8552327f8eed2_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	5004	2024-04-28_ec1f6305e06564efb9b8552327f8eed2_bkransomware.exe
Token: SeDebugPrivilege	2860	CTS.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

2024-04-28_ec1f6305e06564efb9b8552327f8eed2_bkransomware.exeeMZ5tmJ8mqZrvku.exe

description	pid	process	target process
PID 5004 wrote to memory of 4720	5004	2024-04-28_ec1f6305e06564efb9b8552327f8eed2_bkransomware.exe	eMZ5tmJ8mqZrvku.exe
PID 5004 wrote to memory of 4720	5004	2024-04-28_ec1f6305e06564efb9b8552327f8eed2_bkransomware.exe	eMZ5tmJ8mqZrvku.exe
PID 5004 wrote to memory of 4720	5004	2024-04-28_ec1f6305e06564efb9b8552327f8eed2_bkransomware.exe	eMZ5tmJ8mqZrvku.exe
PID 5004 wrote to memory of 2860	5004	2024-04-28_ec1f6305e06564efb9b8552327f8eed2_bkransomware.exe	CTS.exe
PID 5004 wrote to memory of 2860	5004	2024-04-28_ec1f6305e06564efb9b8552327f8eed2_bkransomware.exe	CTS.exe
PID 5004 wrote to memory of 2860	5004	2024-04-28_ec1f6305e06564efb9b8552327f8eed2_bkransomware.exe	CTS.exe
PID 4720 wrote to memory of 1408	4720	eMZ5tmJ8mqZrvku.exe	eMZ5tmJ8mqZrvku.exe
PID 4720 wrote to memory of 1408	4720	eMZ5tmJ8mqZrvku.exe	eMZ5tmJ8mqZrvku.exe
PID 4720 wrote to memory of 1408	4720	eMZ5tmJ8mqZrvku.exe	eMZ5tmJ8mqZrvku.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_ec1f6305e06564efb9b8552327f8eed2_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_ec1f6305e06564efb9b8552327f8eed2_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5004
- C:\Users\Admin\AppData\Local\Temp\eMZ5tmJ8mqZrvku.exe
  C:\Users\Admin\AppData\Local\Temp\eMZ5tmJ8mqZrvku.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:4720
- - C:\Windows\Temp\{0D1DA11F-895B-4E4B-8BAC-632FDBA4F06A}\.cr\eMZ5tmJ8mqZrvku.exe
    "C:\Windows\Temp\{0D1DA11F-895B-4E4B-8BAC-632FDBA4F06A}\.cr\eMZ5tmJ8mqZrvku.exe" -burn.clean.room="C:\Users\Admin\AppData\Local\Temp\eMZ5tmJ8mqZrvku.exe" -burn.filehandle.attached=688 -burn.filehandle.self=536
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    PID:1408
- 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:2860

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3864 --field-trial-handle=2252,i,16504368816373493055,9578615028378602855,262144 --variations-seed-version /prefetch:8
1⤵
PID:1564

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
789KB

MD5
bf407980794f3c2a719becc09736cb39

SHA1
6525d24dd25955c1a8ec90c00294dbb729681605

SHA256
83bcca015b792808d3c73012f647d4350d0c3cea915405dde3f818aac8d9c0a2

SHA512
7facd18857d2cff05853c21f505fda070cf5edc11f24b653a4d7a21abcdf57fc2239269c5fa6e3a1d2af6709465ce9de0a87b91a52fd85698b7650f781ea6d65

Download Submit
C:\Users\Admin\AppData\Local\Temp\eMZ5tmJ8mqZrvku.exe

Filesize
27.9MB

MD5
e7062b85c3624af82079794729618eca

SHA1
958fe3e8415aa00b4c3350ef42716321c2fafdeb

SHA256
fb3d0466f3754752ca7fd839a09ffe53375ff2c981279fd4bc23a005458f7f5d

SHA512
05101359d2ec99f562ef6ec604f1c342f3e05ab88cf7ff95dfb272a861a4a7872458d6cf279dd8c2d73e247af71e8e8d80123e435ab76a6363cb28411d0f7706

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit
C:\Windows\Temp\{0D1DA11F-895B-4E4B-8BAC-632FDBA4F06A}\.cr\eMZ5tmJ8mqZrvku.exe

Filesize
847KB

MD5
29bf0d271cc659ddd598c564e3e9adb5

SHA1
7f21ce21bc79ca6df7a27b0090cdb75be75302d3

SHA256
550962c4268923bf764797577346b6922493b925b8d17565186bf4b74295193c

SHA512
db2a9874aebf6ed6026ee4e8cde71d124706dc269e072d9cbdd715429e4decb84413289eed3f0fbc2ba80a2a25e4f0376dc08f30e1cd566c1974bc84a1535823

Download Submit
C:\Windows\Temp\{E26734A9-1DC9-4EF6-A56B-670330BAE279}\.ba\PythonBA.dll

Filesize
650KB

MD5
67c295f6b2a53365885879907f4aca36

SHA1
0c8e4f9e5af43f0f4c9f42b23c9c19a33011c29a

SHA256
560739d8eb7d23641260ac5950e8693d376b1714b6ae1e202e74e7e2216ff961

SHA512
e8eccf168976a86d5a2bd4be4bb05bd8971afa1f2b3fcd460aac7eda431da0b021b96db71be270be433aa4b2347003dc9e69c43a67c0a7422c8b9a21068a8bb9

Download Submit
C:\Windows\Temp\{E26734A9-1DC9-4EF6-A56B-670330BAE279}\.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