86f26fa82676e195f504332de1d799e8dc9b9a2ac07b3459accff742f6493caa

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
03-05-2024 19:36

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General

Target

2024-05-03_e62fffce63b913e76c2eb945a497551d_bkransomware.exe
Size

214KB
MD5

e62fffce63b913e76c2eb945a497551d
SHA1

268f038ded835e1d71c0f6ad1f6c2a44703098eb
SHA256

86f26fa82676e195f504332de1d799e8dc9b9a2ac07b3459accff742f6493caa
SHA512

09615ce5375f6a6014a295e5264011f58605555beb401e9ea0acde4165789b72deccda056a322b3d33359059b449dbc429e05c6e5797ac3d5f32c699d17154df
SSDEEP

3072:ZhpAyazIlyazTSt8mzN3EK4ujp0QQT9LfgE/itdxTyx2l/otpgFcVz4pFPnV0:hZMazW0v1J9L4EqJ4E/VFR2

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
2524	CTS.exe
2808	g6NKjMAuW6GOQPW.exe

Loads dropped DLL 1 IoCs

pid	Process
332	2024-05-03_e62fffce63b913e76c2eb945a497551d_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"	2024-05-03_e62fffce63b913e76c2eb945a497551d_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	2024-05-03_e62fffce63b913e76c2eb945a497551d_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	332	2024-05-03_e62fffce63b913e76c2eb945a497551d_bkransomware.exe
Token: SeDebugPrivilege	2524	CTS.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 332 wrote to memory of 2808	332	2024-05-03_e62fffce63b913e76c2eb945a497551d_bkransomware.exe	28
PID 332 wrote to memory of 2808	332	2024-05-03_e62fffce63b913e76c2eb945a497551d_bkransomware.exe	28
PID 332 wrote to memory of 2808	332	2024-05-03_e62fffce63b913e76c2eb945a497551d_bkransomware.exe	28
PID 332 wrote to memory of 2808	332	2024-05-03_e62fffce63b913e76c2eb945a497551d_bkransomware.exe	28
PID 332 wrote to memory of 2524	332	2024-05-03_e62fffce63b913e76c2eb945a497551d_bkransomware.exe	29
PID 332 wrote to memory of 2524	332	2024-05-03_e62fffce63b913e76c2eb945a497551d_bkransomware.exe	29
PID 332 wrote to memory of 2524	332	2024-05-03_e62fffce63b913e76c2eb945a497551d_bkransomware.exe	29
PID 332 wrote to memory of 2524	332	2024-05-03_e62fffce63b913e76c2eb945a497551d_bkransomware.exe	29

C:\Users\Admin\AppData\Local\Temp\2024-05-03_e62fffce63b913e76c2eb945a497551d_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-03_e62fffce63b913e76c2eb945a497551d_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:332
- C:\Users\Admin\AppData\Local\Temp\g6NKjMAuW6GOQPW.exe
  C:\Users\Admin\AppData\Local\Temp\g6NKjMAuW6GOQPW.exe
  2⤵
  - Executes dropped EXE
  PID:2808
- 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:2524

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\g6NKjMAuW6GOQPW.exe

Filesize
143KB

MD5
7f9f981d970cbccece6ff126ab309045

SHA1
950a14dc6b636237c2f158cce02076b1a1b371e0

SHA256
82596d7d86d685087965457c297973c2aa1fbff0f6a0a3b8d8760f1cc65105cf

SHA512
ac59a2c6bc3b6fad47bac83d84336387b03b45d186c5d021f3c57c7fb160491e8344923d4978e50fb37f6c37e45bbb9c0f9b7cd4b93506ff571c82b795c6fb47

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit
memory/2808-12-0x000007FEF5D73000-0x000007FEF5D74000-memory.dmp

Filesize
4KB

Download
memory/2808-14-0x0000000000D90000-0x0000000000DB8000-memory.dmp

Filesize
160KB

Download
memory/2808-15-0x000007FEF5D70000-0x000007FEF675C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads