c3aa8f8fdb4c960f3b695cb5b6404aacb35f8d8bbdcdf1a32808b076ee275aba

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

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
2056	5nYdWsSWXORq63l.exe
2836	CTS.exe

Loads dropped DLL 2 IoCs

pid	Process
2132	2024-05-09_b8312762750b417f1f724b45eee35b9a_bkransomware.exe
2132	2024-05-09_b8312762750b417f1f724b45eee35b9a_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"	2024-05-09_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	2132	2024-05-09_b8312762750b417f1f724b45eee35b9a_bkransomware.exe
Token: SeDebugPrivilege	2836	CTS.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2132 wrote to memory of 2056	2132	2024-05-09_b8312762750b417f1f724b45eee35b9a_bkransomware.exe	28
PID 2132 wrote to memory of 2056	2132	2024-05-09_b8312762750b417f1f724b45eee35b9a_bkransomware.exe	28
PID 2132 wrote to memory of 2056	2132	2024-05-09_b8312762750b417f1f724b45eee35b9a_bkransomware.exe	28
PID 2132 wrote to memory of 2056	2132	2024-05-09_b8312762750b417f1f724b45eee35b9a_bkransomware.exe	28
PID 2132 wrote to memory of 2836	2132	2024-05-09_b8312762750b417f1f724b45eee35b9a_bkransomware.exe	29
PID 2132 wrote to memory of 2836	2132	2024-05-09_b8312762750b417f1f724b45eee35b9a_bkransomware.exe	29
PID 2132 wrote to memory of 2836	2132	2024-05-09_b8312762750b417f1f724b45eee35b9a_bkransomware.exe	29
PID 2132 wrote to memory of 2836	2132	2024-05-09_b8312762750b417f1f724b45eee35b9a_bkransomware.exe	29

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⤵
- Loads dropped DLL
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2132
- C:\Users\Admin\AppData\Local\Temp\5nYdWsSWXORq63l.exe
  C:\Users\Admin\AppData\Local\Temp\5nYdWsSWXORq63l.exe
  2⤵
  - Executes dropped EXE
  PID:2056
- 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:2836

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\5nYdWsSWXORq63l.exe

Filesize
135KB

MD5
2a1b5147e297e3682d18a15de5d61af8

SHA1
113c590e35f537dda3d273b6864a7b97fa0cb81f

SHA256
301789e37e79ad72e3c5a936e091af39ed72fa441106cf3424ba3a7729729881

SHA512
ed3a1d2fc1bd47126e13d05dc0d6ffccaf39fa7f95bcb5df5b674dccfe1873fdbb2cd778c085bbefe624237f5d681aaa8b3f5c57549b5f2188aefba2d3703cbb

Download Submit
C:\Users\Admin\AppData\Local\Temp\5nYdWsSWXORq63l.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

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads