b0c12ac6700ed13dd70a09c67aad3559d3020c330fc71c9f3c53ecc9afdea98a

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
03/06/2024, 09:26

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General

Target
2024-06-03_02f6b237cd741d9110ee2cbfc1a2714f_bkransomware.exe
Size 76KB
Sample240603-leddaaaa7w
SHA256 b0c12ac6700ed13dd70a09c67aad3559d3020c330fc71c9f3c53ecc9afdea98a
MD5 02f6b237cd741d9110ee2cbfc1a2714f
SHA1 b84541238cede116e5a67fe9b6235c48bacb29b1
SHA512 22bd1e1d2e588193d773f7eb279b31de09b4337f1350f0f00e708506fe1a29a7b079e8be2b30fa9c3d87b897b09430e494a6796df92d49bea8251c4ade2030f4
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTT:ZRpAyazIliazTT
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2836	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_02f6b237cd741d9110ee2cbfc1a2714f_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_02f6b237cd741d9110ee2cbfc1a2714f_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4416	2024-06-03_02f6b237cd741d9110ee2cbfc1a2714f_bkransomware.exe
Token: SeDebugPrivilege	2836	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4416 wrote to memory of 2836	4416	2024-06-03_02f6b237cd741d9110ee2cbfc1a2714f_bkransomware.exe	81
PID 4416 wrote to memory of 2836	4416	2024-06-03_02f6b237cd741d9110ee2cbfc1a2714f_bkransomware.exe	81
PID 4416 wrote to memory of 2836	4416	2024-06-03_02f6b237cd741d9110ee2cbfc1a2714f_bkransomware.exe	81

C:\Users\Admin\AppData\Local\Temp\2024-06-03_02f6b237cd741d9110ee2cbfc1a2714f_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-03_02f6b237cd741d9110ee2cbfc1a2714f_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4416
- 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

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 b8f20fc9ed2ae07f25b775eb5afebc12fe188317008d451703774142b39c0dcf
MD5 0d8515b646df5568af9ebbde76ce47a6
SHA1 887d62b947ab9e9d69d6af832b163e165a659b2c
SHA512 4b02ad5f7a952d60603fea22662a2e7b42d3a476cf1559708dc0e70d9cd8a9d9ca6faa98550983274f9b979433b3375bac6859b342d9c74106ccbb705feaf2cd
SSDEEP 12288:xC0OTeRAmyNzlLujKZVWg7vZn2zHYGvclR32/FgSW:DDxWhu+qCnx662/er
MD5 SHA1 SHA512 SSDEEP

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CebFuOpU7cx9Klf.exe

Path C:\Users\Admin\AppData\Local\Temp\CebFuOpU7cx9Klf.exe
Size 76KB
SHA256 9f9906dcbe562a433a07bb7573a9b858ce502bca9356a3b1dd0898dbdd5a2719
MD5 e617000fbc466207295ff6d9d10ef922
SHA1 ad1beaa2fc9f07dd9d9cba930ca1766bba5aae16
SHA512 525a88dd2bb9c8f683f24376044fa6dc6d6fe93e8f13757cb8eec88f9d39c82953c9593f65466a04f5be9fa905f729958662da84145d9987d559a43777a0637c
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTGECnn:ZRpAyazIliazTQnn
MD5 SHA1 SHA512 SSDEEP

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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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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads