9b04e4fc6e74cd2505d574668d0f88d79679af1f12d380d2136f2a785056d9ea

Analysis

max time kernel
120s
max time network
121s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
11/05/2024, 15:33

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General

Target

2024-05-11_c4de79253987ef24561160b0fda73dee_bkransomware.exe
Size

262KB
MD5

c4de79253987ef24561160b0fda73dee
SHA1

ad307e6ff2f85567effc74de749f40600ff1615d
SHA256

9b04e4fc6e74cd2505d574668d0f88d79679af1f12d380d2136f2a785056d9ea
SHA512

22ba6ef98d1c3023e77dd2b3989b626da6fc8b57881da07474be933d041a72be1205ebd8c33964d24080b7ccb6ae75540e257fda414f60bc9302ec939ac8d83e
SSDEEP

6144:hZMazhUuJd8Al7t3t891EMu+dKCwLa+gavuMU:hS0WuvrJd8/Es4ana2MU

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
2668	l3D5IFGWcIeg1nn.exe
1336	CTS.exe

Loads dropped DLL 1 IoCs

pid	Process
2084	2024-05-11_c4de79253987ef24561160b0fda73dee_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"	2024-05-11_c4de79253987ef24561160b0fda73dee_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	2024-05-11_c4de79253987ef24561160b0fda73dee_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2084	2024-05-11_c4de79253987ef24561160b0fda73dee_bkransomware.exe
Token: SeDebugPrivilege	1336	CTS.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2084 wrote to memory of 2668	2084	2024-05-11_c4de79253987ef24561160b0fda73dee_bkransomware.exe	28
PID 2084 wrote to memory of 2668	2084	2024-05-11_c4de79253987ef24561160b0fda73dee_bkransomware.exe	28
PID 2084 wrote to memory of 2668	2084	2024-05-11_c4de79253987ef24561160b0fda73dee_bkransomware.exe	28
PID 2084 wrote to memory of 2668	2084	2024-05-11_c4de79253987ef24561160b0fda73dee_bkransomware.exe	28
PID 2084 wrote to memory of 1336	2084	2024-05-11_c4de79253987ef24561160b0fda73dee_bkransomware.exe	29
PID 2084 wrote to memory of 1336	2084	2024-05-11_c4de79253987ef24561160b0fda73dee_bkransomware.exe	29
PID 2084 wrote to memory of 1336	2084	2024-05-11_c4de79253987ef24561160b0fda73dee_bkransomware.exe	29
PID 2084 wrote to memory of 1336	2084	2024-05-11_c4de79253987ef24561160b0fda73dee_bkransomware.exe	29

C:\Users\Admin\AppData\Local\Temp\2024-05-11_c4de79253987ef24561160b0fda73dee_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-11_c4de79253987ef24561160b0fda73dee_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:2084
- C:\Users\Admin\AppData\Local\Temp\l3D5IFGWcIeg1nn.exe
  C:\Users\Admin\AppData\Local\Temp\l3D5IFGWcIeg1nn.exe
  2⤵
  - Executes dropped EXE
  PID:2668
- 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:1336

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:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

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\Users\Admin\AppData\Local\Temp\l3D5IFGWcIeg1nn.exe

Filesize
191KB

MD5
94a363cd532d88ac33997c25657a19b5

SHA1
a98f1a8361d0183651c0ef457b9ac4339e429bea

SHA256
13b98844b2fa4a39a4d8ebb414fc79450d5ab4f0c8f5141ac06d40b2a0431ea4

SHA512
3b1c87a67f63e4276453ec1e322f0c13896dd0524ef35f4e4037a481ce354feaa98440f85b784c0b90a900c59ef115654f687457180ea433ea0100427f5c26f5

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads