c3aa8f8fdb4c960f3b695cb5b6404aacb35f8d8bbdcdf1a32808b076ee275aba

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
09-05-2024 09:32

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General

Target

2024-05-09_b8312762750b417f1f724b45eee35b9a_bkransomware.exe
Size

135KB
MD5

b8312762750b417f1f724b45eee35b9a
SHA1

759294c86f682af3e0b2afcdb68852b7a8c5233d
SHA256

c3aa8f8fdb4c960f3b695cb5b6404aacb35f8d8bbdcdf1a32808b076ee275aba
SHA512

b03adbbee92794f0d940e329726b17ddcb8a1168eee10e67a0199897e972c8c76617a827e07917d2cf02b872a95268b9e539258c14b02cdc19ea4dc0d802d509
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTd31w+WGnH/Qwlwa+6eylvvAYOTU0TD:ZhpAyazIlyazTd3pH/QwL1vvwYONJ4FK

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
2576	BdLYfR1yzOZ3wh6.exe
3188	CTS.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"	2024-05-09_b8312762750b417f1f724b45eee35b9a_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	2024-05-09_b8312762750b417f1f724b45eee35b9a_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2236	2024-05-09_b8312762750b417f1f724b45eee35b9a_bkransomware.exe
Token: SeDebugPrivilege	3188	CTS.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2236 wrote to memory of 2576	2236	2024-05-09_b8312762750b417f1f724b45eee35b9a_bkransomware.exe	84
PID 2236 wrote to memory of 2576	2236	2024-05-09_b8312762750b417f1f724b45eee35b9a_bkransomware.exe	84
PID 2236 wrote to memory of 2576	2236	2024-05-09_b8312762750b417f1f724b45eee35b9a_bkransomware.exe	84
PID 2236 wrote to memory of 3188	2236	2024-05-09_b8312762750b417f1f724b45eee35b9a_bkransomware.exe	85
PID 2236 wrote to memory of 3188	2236	2024-05-09_b8312762750b417f1f724b45eee35b9a_bkransomware.exe	85
PID 2236 wrote to memory of 3188	2236	2024-05-09_b8312762750b417f1f724b45eee35b9a_bkransomware.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-05-09_b8312762750b417f1f724b45eee35b9a_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-09_b8312762750b417f1f724b45eee35b9a_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2236
- C:\Users\Admin\AppData\Local\Temp\BdLYfR1yzOZ3wh6.exe
  C:\Users\Admin\AppData\Local\Temp\BdLYfR1yzOZ3wh6.exe
  2⤵
  - Executes dropped EXE
  PID:2576
- 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:3188

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\Microsoft\Office\16.0\excel.exe_Rules.xml

Filesize
392KB

MD5
573f69aa95880e2d405baa33817fe749

SHA1
608f6e6e004ef42840b4a1e761c28d5696cc7a50

SHA256
12d67cf2ef764fd108188563fa85608ea6d77ef276cdde8bba36b1f1d8ba263a

SHA512
cdb6393ef8cfa72b3e643363a1cef9ae04a338c56eeec920eccfbff0c6fd425eb21c07df49d23e623d8ad2d3fd411d6a7fde14a7083042e0bf2fc9256ad50ac1

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C:\Users\Admin\AppData\Local\Temp\BdLYfR1yzOZ3wh6.exe

Filesize
64KB

MD5
a32a382b8a5a906e03a83b4f3e5b7a9b

SHA1
11e2bdd0798761f93cce363329996af6c17ed796

SHA256
75f12ea2f30d9c0d872dade345f30f562e6d93847b6a509ba53beec6d0b2c346

SHA512
ec87dd957be21b135212454646dcabdd7ef9442cf714e2c1f6b42b81f0c3fa3b1875bde9a8b538e8a0aa2190225649c29e9ed0f25176e7659e55e422dd4efe4c

Download Submit
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