4ff9ec4f05c9f69abd24e4a262fd47575b45f329cadf69295bc1a22a11cebfb2

General

Target

2024-05-12_b9cbf396b5b2bec35c8c263ce308347b_bkransomware.exe
Size

96KB
MD5

b9cbf396b5b2bec35c8c263ce308347b
SHA1

feb97af72f1fe5266c7c898c21723cb16bf07d07
SHA256

4ff9ec4f05c9f69abd24e4a262fd47575b45f329cadf69295bc1a22a11cebfb2
SHA512

ac1fb80dc4b69e646277f334bec83102d3b978422d57f52d35d037830e0a0e8ca93d7285c9fe722afcc5d555faafadad718c43f847bc28d99252b7d1a62e0627
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT8vGjQ8/KAFFhj9C4D6:ZRpAyazIliazTwGj3KA3hjLe

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
2188	rCxHMCoTWQvq4tY.exe
1216	CTS.exe

Loads dropped DLL 3 IoCs

pid	Process
2388	2024-05-12_b9cbf396b5b2bec35c8c263ce308347b_bkransomware.exe
2388	2024-05-12_b9cbf396b5b2bec35c8c263ce308347b_bkransomware.exe
2872	Process not Found

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"	2024-05-12_b9cbf396b5b2bec35c8c263ce308347b_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	2024-05-12_b9cbf396b5b2bec35c8c263ce308347b_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2388	2024-05-12_b9cbf396b5b2bec35c8c263ce308347b_bkransomware.exe
Token: SeDebugPrivilege	1216	CTS.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2388 wrote to memory of 2188	2388	2024-05-12_b9cbf396b5b2bec35c8c263ce308347b_bkransomware.exe	28
PID 2388 wrote to memory of 2188	2388	2024-05-12_b9cbf396b5b2bec35c8c263ce308347b_bkransomware.exe	28
PID 2388 wrote to memory of 2188	2388	2024-05-12_b9cbf396b5b2bec35c8c263ce308347b_bkransomware.exe	28
PID 2388 wrote to memory of 2188	2388	2024-05-12_b9cbf396b5b2bec35c8c263ce308347b_bkransomware.exe	28
PID 2388 wrote to memory of 1216	2388	2024-05-12_b9cbf396b5b2bec35c8c263ce308347b_bkransomware.exe	30
PID 2388 wrote to memory of 1216	2388	2024-05-12_b9cbf396b5b2bec35c8c263ce308347b_bkransomware.exe	30
PID 2388 wrote to memory of 1216	2388	2024-05-12_b9cbf396b5b2bec35c8c263ce308347b_bkransomware.exe	30
PID 2388 wrote to memory of 1216	2388	2024-05-12_b9cbf396b5b2bec35c8c263ce308347b_bkransomware.exe	30

C:\Users\Admin\AppData\Local\Temp\2024-05-12_b9cbf396b5b2bec35c8c263ce308347b_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-12_b9cbf396b5b2bec35c8c263ce308347b_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:2388
- C:\Users\Admin\AppData\Local\Temp\rCxHMCoTWQvq4tY.exe
  C:\Users\Admin\AppData\Local\Temp\rCxHMCoTWQvq4tY.exe
  2⤵
  - Executes dropped EXE
  PID:2188
- 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:1216

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\rCxHMCoTWQvq4tY.exe

Filesize
96KB

MD5
bd72ef5ed427bc4d05540a8ef51ebf8e

SHA1
409f7a657f98fcfbd714d387dffc18cea98dc5e7

SHA256
40a05c3643ae2debe6bb00750a11a033122c619389a5cea33ab061476a201b2e

SHA512
31e00db07f3a0437ddf32a6c4d89dc0827c48095e12e70324156c3bf6d4f1cc425c660b1d371d361f37c548cfa3c0bfebbdb6be6e0adc24935befa9d52622f3b

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit
\Users\Admin\AppData\Local\Temp\rCxHMCoTWQvq4tY.exe

Filesize
25KB

MD5
abbd49c180a2f8703f6306d6fa731fdc

SHA1
d63f4bfe7f74936b2fbace803e3da6103fbf6586

SHA256
5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1

SHA512
290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9

Download Submit
memory/2188-15-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads

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