8cda1346ee81b64aa35d3d05d37170ed7c720234dcc893d56eb09893042655f3

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
27-04-2024 18:08

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General

Target

2024-04-27_77881f0bfec777b6aebf7c0b7d147264_bkransomware.exe
Size

131KB
MD5

77881f0bfec777b6aebf7c0b7d147264
SHA1

2aef961efdebc4c97df26d5a1d06e2c0070695ec
SHA256

8cda1346ee81b64aa35d3d05d37170ed7c720234dcc893d56eb09893042655f3
SHA512

bfd193776859f805eda4ee44c30e3fc60fc758e7e91d1f497de0f95a040e44a248efaed3e7b2b54a5ebcf9f2e5c2b095f15dbc968ae83f7cc38ad10bef45c10a
SSDEEP

3072:ZhpAyazIlyazTkkIjWjWtvpouJ1r5ovm8DTj:hZMazHLRy1l+m8DX

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
2004	n2CBcWr65VwuoyH.exe
3036	CTS.exe

Loads dropped DLL 2 IoCs

pid	Process
2180	2024-04-27_77881f0bfec777b6aebf7c0b7d147264_bkransomware.exe
2180	2024-04-27_77881f0bfec777b6aebf7c0b7d147264_bkransomware.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"	2024-04-27_77881f0bfec777b6aebf7c0b7d147264_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	2024-04-27_77881f0bfec777b6aebf7c0b7d147264_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2180	2024-04-27_77881f0bfec777b6aebf7c0b7d147264_bkransomware.exe
Token: SeDebugPrivilege	3036	CTS.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2180 wrote to memory of 2004	2180	2024-04-27_77881f0bfec777b6aebf7c0b7d147264_bkransomware.exe	28
PID 2180 wrote to memory of 2004	2180	2024-04-27_77881f0bfec777b6aebf7c0b7d147264_bkransomware.exe	28
PID 2180 wrote to memory of 2004	2180	2024-04-27_77881f0bfec777b6aebf7c0b7d147264_bkransomware.exe	28
PID 2180 wrote to memory of 2004	2180	2024-04-27_77881f0bfec777b6aebf7c0b7d147264_bkransomware.exe	28
PID 2180 wrote to memory of 3036	2180	2024-04-27_77881f0bfec777b6aebf7c0b7d147264_bkransomware.exe	29
PID 2180 wrote to memory of 3036	2180	2024-04-27_77881f0bfec777b6aebf7c0b7d147264_bkransomware.exe	29
PID 2180 wrote to memory of 3036	2180	2024-04-27_77881f0bfec777b6aebf7c0b7d147264_bkransomware.exe	29
PID 2180 wrote to memory of 3036	2180	2024-04-27_77881f0bfec777b6aebf7c0b7d147264_bkransomware.exe	29

C:\Users\Admin\AppData\Local\Temp\2024-04-27_77881f0bfec777b6aebf7c0b7d147264_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-27_77881f0bfec777b6aebf7c0b7d147264_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:2180
- C:\Users\Admin\AppData\Local\Temp\n2CBcWr65VwuoyH.exe
  C:\Users\Admin\AppData\Local\Temp\n2CBcWr65VwuoyH.exe
  2⤵
  - Executes dropped EXE
  PID:2004
- 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:3036

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\n2CBcWr65VwuoyH.exe

Filesize
60KB

MD5
ed0fde686788caec4f2cb1ec9c31680c

SHA1
81ae63b87eaa9fa5637835d2122c50953ae19d34

SHA256
e362670f93cdd952335b1a41e5529f184f2022ea4d41817a9781b150b062511c

SHA512
d90d5e74a9be23816a93490ed30c0aae9f7f038a42bd14aa2ce78e95967b4aabd848f006f00ade619c9976755658d45aa0f5b6d5babbbb2d59a6ed3a3a12ac6b

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C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads