4a20e45e5ef46d57e041253c50cd001e354a1b793f64f072c6a005ab9d886046

Analysis

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

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
03/06/2024, 09:43

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General

Target
2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe
Size 96KB
Sample240603-lp2hvsbf77
SHA256 4a20e45e5ef46d57e041253c50cd001e354a1b793f64f072c6a005ab9d886046
MD5 6d9c1457f7c1e8371f2b19578cebe8b5
SHA1 16fe2bf152a52c52d929f0edafb38b415faa96ef
SHA512 fb80c64da8166c52db985a69fd04501be7e7e71968d4dfee976865150ad7bc12d7f8f663ebe65aeb4fb62fff3e6dec2cc3f21ca3ef467659f41956f9e2d5990d
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTndpaf5tPKDz+CjMjJ0Tlc:ZRpAyazIliazTndp05tSDiJf
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
3016	CTS.exe
2376	tFaqkJmI52IWTby.exe

Loads dropped DLL 3 IoCs

pid	Process
1676	2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe
1676	2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe
2552	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"	2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_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	2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1676	2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe
Token: SeDebugPrivilege	3016	CTS.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1676 wrote to memory of 2376	1676	2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe	28
PID 1676 wrote to memory of 2376	1676	2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe	28
PID 1676 wrote to memory of 2376	1676	2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe	28
PID 1676 wrote to memory of 2376	1676	2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe	28
PID 1676 wrote to memory of 3016	1676	2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe	29
PID 1676 wrote to memory of 3016	1676	2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe	29
PID 1676 wrote to memory of 3016	1676	2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe	29
PID 1676 wrote to memory of 3016	1676	2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe	29

C:\Users\Admin\AppData\Local\Temp\2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_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:1676
- C:\Users\Admin\AppData\Local\Temp\tFaqkJmI52IWTby.exe
  C:\Users\Admin\AppData\Local\Temp\tFaqkJmI52IWTby.exe
  2⤵
  - Executes dropped EXE
  PID:2376
- 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:3016

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

CTS.exe

Path C:\Windows\CTS.exe
Size 71KB
SHA256 b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
MD5 f9d4ab0a726adc9b5e4b7d7b724912f1
SHA1 3d42ca2098475924f70ee4a831c4f003b4682328
SHA512 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT:ZRpAyazIliazT
MD5 SHA1 SHA512 SSDEEP

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tFaqkJmI52IWTby.exe

Path \Users\Admin\AppData\Local\Temp\tFaqkJmI52IWTby.exe
Size 25KB
SHA256 5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1
MD5 abbd49c180a2f8703f6306d6fa731fdc
SHA1 d63f4bfe7f74936b2fbace803e3da6103fbf6586
SHA512 290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9
SSDEEP 384:OSZ/JKNZKZCGRHJPth4VKAvDgDJgoku8:OSQQTRJPzkKAEN
MD5 SHA1 SHA512 SSDEEP

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memory/2376-15-0x0000000000400000-0x000000000040D000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads