4861efcced10e1b511aec9dd444eea4d02e4f762ba23766d2958810f0b418789

Analysis

max time kernel
66s
max time network
54s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
28-04-2024 14:38

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General

Target

2024-04-28_6d63c060e95b627e85004b27e3251301_bkransomware.exe
Size

71KB
MD5

6d63c060e95b627e85004b27e3251301
SHA1

1881186be5d4a776b17eb9e6a8db4272d2b3417f
SHA256

4861efcced10e1b511aec9dd444eea4d02e4f762ba23766d2958810f0b418789
SHA512

afd305db38004e2fe390cc31a9a2d2c9ed7a3f73b45392d538a565c42c753a64e2494a59dbc481fb978845829605ee8009c3704883749a798cd091b46488644d
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazT2iU:ZhpAyazIlyazT2iU

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

3212 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

pid	process
3212	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-04-28_6d63c060e95b627e85004b27e3251301_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-04-28_6d63c060e95b627e85004b27e3251301_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

Processes:

CTS.exe2024-04-28_6d63c060e95b627e85004b27e3251301_bkransomware.exe

description ioc process

File created C:\Windows\CTS.exe CTS.exe
File created C:\Windows\CTS.exe 2024-04-28_6d63c060e95b627e85004b27e3251301_bkransomware.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_6d63c060e95b627e85004b27e3251301_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 1108 2024-04-28_6d63c060e95b627e85004b27e3251301_bkransomware.exe
Token: SeDebugPrivilege 3212 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	CTS.exe
File created	C:\Windows\CTS.exe	2024-04-28_6d63c060e95b627e85004b27e3251301_bkransomware.exe

description	pid	process
Token: SeDebugPrivilege	1108	2024-04-28_6d63c060e95b627e85004b27e3251301_bkransomware.exe
Token: SeDebugPrivilege	3212	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_6d63c060e95b627e85004b27e3251301_bkransomware.exe

description	pid	process	target process
PID 1108 wrote to memory of 3212	1108	2024-04-28_6d63c060e95b627e85004b27e3251301_bkransomware.exe	CTS.exe
PID 1108 wrote to memory of 3212	1108	2024-04-28_6d63c060e95b627e85004b27e3251301_bkransomware.exe	CTS.exe
PID 1108 wrote to memory of 3212	1108	2024-04-28_6d63c060e95b627e85004b27e3251301_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_6d63c060e95b627e85004b27e3251301_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_6d63c060e95b627e85004b27e3251301_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1108

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:3212

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Filesize
392KB

MD5
7f2ae015f789bf14d7cac54b92110676

SHA1
772eb3397a0b175bafbdad2f9dcc02be6013410e

SHA256
278107083a1f41639f86a310ded2c754505224e81fbce8d133430b1adc6671ba

SHA512
45d55c573201b7be847af54efa5cc87c8cc7e8abf1daf83d5362ead7f233299149aae3e343bc6ac1b8bfd6174964f10e731b21c72573f6bea07fb367582efd50

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C:\Users\Admin\AppData\Local\Temp\cfwrBDTF9bZchLQ.exe
Filesize
71KB

MD5
3e6c13f050a07318f282018ed6472828

SHA1
70717f17ac6ba662e65046ca5fc2bad6b3829899

SHA256
4754a1e90763f196e3d0f943bfa465afa3102453f30c734ea30693a97bdc48bc

SHA512
4b09c07d2f4a86a501af6f917ca592cdb271c47e6fba81708246b7c95db9b179fde50fa103e68faf01ccb3902ea4424cf236078a21a5c8a5daa0ee2e47ed1461

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C:\Windows\CTS.exe
Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit