b85702bf9e42a123c67fcc6d6fe45b022992c8a61fde3ae3ea74fa23ec261672

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
03/06/2024, 20:35

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General

Target
2024-06-03_b10aa9c06ecb001be92c62a103467f79_bkransomware.exe
Size 71KB
Sample240603-zda4eshh22
SHA256 b85702bf9e42a123c67fcc6d6fe45b022992c8a61fde3ae3ea74fa23ec261672
MD5 b10aa9c06ecb001be92c62a103467f79
SHA1 abd4606eaaa7fd01b8352ef32b3c18b6ae47abdc
SHA512 36e00a40873a848d2a45ce08eec1210a6bc2837dac0abf71a8b27d6ed9c1bc5ea6c51eed77e18b976e724affe41680a6d94c8b2f69f4aca8f7fca7032424d1ad
SSDEEP 1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTk:ZhpAyazIlyazTk
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4188	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"	2024-06-03_b10aa9c06ecb001be92c62a103467f79_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_b10aa9c06ecb001be92c62a103467f79_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4556	2024-06-03_b10aa9c06ecb001be92c62a103467f79_bkransomware.exe
Token: SeDebugPrivilege	4188	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4556 wrote to memory of 4188	4556	2024-06-03_b10aa9c06ecb001be92c62a103467f79_bkransomware.exe	84
PID 4556 wrote to memory of 4188	4556	2024-06-03_b10aa9c06ecb001be92c62a103467f79_bkransomware.exe	84
PID 4556 wrote to memory of 4188	4556	2024-06-03_b10aa9c06ecb001be92c62a103467f79_bkransomware.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-06-03_b10aa9c06ecb001be92c62a103467f79_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-03_b10aa9c06ecb001be92c62a103467f79_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4556
- 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:4188

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

excel.exe_Rules.xml

Path C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Size 394KB
SHA256 a7f58f49b4ca4d251b54a8834893e74c8ebce2e9fc095cb20229013347928a52
MD5 e0dbabe109cef2adb38271ce234803a5
SHA1 bccbfb47efbb4805399e84f4d470b34f35a24575
SHA512 81818bb3d1cd384e94dc911a88f1317f914e0a6bf042a53f4728c89fb3e75fc08a7df81acd7527f89425fae69bd5182a8db3265fd6e5ce2067788ae23c5ca5d4
SSDEEP 6144:hZMazYiekjE5G5hHEZeh3LQ1Y4ntcv/ebvIxjhtuVM8x7kzx82iyPqyjOSxEtwpX:hS0DZjE5G5QeVKi/ECOM8pScyCyjOFt2
MD5 SHA1 SHA512 SSDEEP

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LnxySty9iPViulg.exe

Path C:\Users\Admin\AppData\Local\Temp\LnxySty9iPViulg.exe
Size 71KB
SHA256 7ba19f7294bdc54ffb9effa982361fc97431f7d6ec4a5a901836be425068dace
MD5 5ee3c3885ba6c3e886f3d6eff03e36c1
SHA1 7586764782af6e140fb4ecee3f8654e579c640e6
SHA512 0fbb82b25469915333b3e54c6d5fa3affba96f8a6f768c926aec9ebacae4909a04503bc732f2d0f86060879ab7e1ddf2f0dbe5fec48accf459e05eba9daa7ca3
SSDEEP 1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTH:ZhpAyazIlyazTH
MD5 SHA1 SHA512 SSDEEP

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CTS.exe

Path C:\Windows\CTS.exe
Size 71KB
SHA256 075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
MD5 66df4ffab62e674af2e75b163563fc0b
SHA1 dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA512 1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25
SSDEEP 1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazT:ZhpAyazIlyazT
MD5 SHA1 SHA512 SSDEEP

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads