8e32f8de2799fa5eaacd7bf08d84957a21a2b8ac07fffeeb05c4c29396097159

Analysis

max time kernel
122s
max time network
123s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
05/07/2024, 18:49

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General

Target

2024-07-05_389c307f2d110f0b1338ef835c1a0f06_bkransomware.exe
Size

518KB
MD5

389c307f2d110f0b1338ef835c1a0f06
SHA1

a71e9e9010721fb4ddf4f6dc4195210c0f4a6ff5
SHA256

8e32f8de2799fa5eaacd7bf08d84957a21a2b8ac07fffeeb05c4c29396097159
SHA512

7fc82d28508e347a54b23b959a4d9bbf03abc3ede7a31c48ee7fa7b8d612bde76ea99745b5d9ced02ae53b013139d712e71a29f197b3b68a08e3240f6fbd7e5d
SSDEEP

12288:hS0yVp/SS21bFgNbffYx6hd/VbvAFSBgNwkLIuvHS:DTh1bsbffYx6hNVLA2k8uvHS

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
1356	CTS.exe
1608	1EMgo1uu7sRVTc3.exe

Loads dropped DLL 2 IoCs

pid	Process
2056	2024-07-05_389c307f2d110f0b1338ef835c1a0f06_bkransomware.exe
2056	2024-07-05_389c307f2d110f0b1338ef835c1a0f06_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"	2024-07-05_389c307f2d110f0b1338ef835c1a0f06_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	CTS.exe
File created	C:\Windows\CTS.exe	2024-07-05_389c307f2d110f0b1338ef835c1a0f06_bkransomware.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2056	2024-07-05_389c307f2d110f0b1338ef835c1a0f06_bkransomware.exe
Token: SeDebugPrivilege	1356	CTS.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2056 wrote to memory of 1608	2056	2024-07-05_389c307f2d110f0b1338ef835c1a0f06_bkransomware.exe	28
PID 2056 wrote to memory of 1608	2056	2024-07-05_389c307f2d110f0b1338ef835c1a0f06_bkransomware.exe	28
PID 2056 wrote to memory of 1608	2056	2024-07-05_389c307f2d110f0b1338ef835c1a0f06_bkransomware.exe	28
PID 2056 wrote to memory of 1608	2056	2024-07-05_389c307f2d110f0b1338ef835c1a0f06_bkransomware.exe	28
PID 2056 wrote to memory of 1356	2056	2024-07-05_389c307f2d110f0b1338ef835c1a0f06_bkransomware.exe	29
PID 2056 wrote to memory of 1356	2056	2024-07-05_389c307f2d110f0b1338ef835c1a0f06_bkransomware.exe	29
PID 2056 wrote to memory of 1356	2056	2024-07-05_389c307f2d110f0b1338ef835c1a0f06_bkransomware.exe	29
PID 2056 wrote to memory of 1356	2056	2024-07-05_389c307f2d110f0b1338ef835c1a0f06_bkransomware.exe	29

C:\Users\Admin\AppData\Local\Temp\2024-07-05_389c307f2d110f0b1338ef835c1a0f06_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-07-05_389c307f2d110f0b1338ef835c1a0f06_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:2056
- C:\Users\Admin\AppData\Local\Temp\1EMgo1uu7sRVTc3.exe
  C:\Users\Admin\AppData\Local\Temp\1EMgo1uu7sRVTc3.exe
  2⤵
  - Executes dropped EXE
  PID:1608
- 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:1356

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\1EMgo1uu7sRVTc3.exe

Filesize
447KB

MD5
3f461ca3e3d9da036cf1a4a06ddf4fb4

SHA1
15395e4b656cee3a708bc50c1094e3fa0c46802e

SHA256
cd8e84c1f8d1ee3a7014343e3fb236329d2b67c1ec233ea4b208d99e3f95105b

SHA512
d0cb3f56db648c9ee151990260a864cdcd0d508a1dafcd741d8b2ccd8f73ba29607f384a4e2752502419cfd4a41d2288d7c3ffec93925be85fc39dad9c01e7f5

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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