8e3c9027afd501d01a8b0e68890df98ac02d8f9bde88311d81eedb80d9f1fe05

Analysis

max time kernel
94s
max time network
95s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
28-04-2024 10:06

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General

Target

2024-04-28_6f62c562326c12f1b4db1a13486daec5_bkransomware.exe
Size

71KB
MD5

6f62c562326c12f1b4db1a13486daec5
SHA1

bcf5defeb0c30ae6077d6116de0243fd28ae7964
SHA256

8e3c9027afd501d01a8b0e68890df98ac02d8f9bde88311d81eedb80d9f1fe05
SHA512

97471fb6348bf517b43af4cce9a3c5ecf412b6ca8a6069c11ef098495e996c3a9d35f1bd98a7a06b2530cfd339c460bdc9723956ee215664459a89e98ed42368
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazT8iY:ZhpAyazIlyazT8x

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

932 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
932	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_6f62c562326c12f1b4db1a13486daec5_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_6f62c562326c12f1b4db1a13486daec5_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:

2024-04-28_6f62c562326c12f1b4db1a13486daec5_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_6f62c562326c12f1b4db1a13486daec5_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_6f62c562326c12f1b4db1a13486daec5_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 2240 2024-04-28_6f62c562326c12f1b4db1a13486daec5_bkransomware.exe
Token: SeDebugPrivilege 932 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_6f62c562326c12f1b4db1a13486daec5_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	2240	2024-04-28_6f62c562326c12f1b4db1a13486daec5_bkransomware.exe
Token: SeDebugPrivilege	932	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_6f62c562326c12f1b4db1a13486daec5_bkransomware.exe

description	pid	process	target process
PID 2240 wrote to memory of 932	2240	2024-04-28_6f62c562326c12f1b4db1a13486daec5_bkransomware.exe	CTS.exe
PID 2240 wrote to memory of 932	2240	2024-04-28_6f62c562326c12f1b4db1a13486daec5_bkransomware.exe	CTS.exe
PID 2240 wrote to memory of 932	2240	2024-04-28_6f62c562326c12f1b4db1a13486daec5_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_6f62c562326c12f1b4db1a13486daec5_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_6f62c562326c12f1b4db1a13486daec5_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2240

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:932

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

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Downloads

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

MD5
afb626ed5fba046b0d041c1a7182d550

SHA1
1570160dc2623ea2b83e2501203de906a605c03b

SHA256
769f96724cd3abe098281bb237a9920431b04613f9e158035c64abea924cf9b7

SHA512
d3fdb84af5e6acc94b56f27f73ab88008801e39d000919f3a4238733ac1fa2d97f520742a552e934434036e799b7b3196747ac90ffc0e0795c72dfd5d87dea2d

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C:\Users\Admin\AppData\Local\Temp\wx8reLvPVw7OvIv.exe
Filesize
71KB

MD5
3b4babb2d708c5c764b647baada72126

SHA1
59fd963996ec8848a2fbc2bfbc1850df53962947

SHA256
fad6b90c0c987f255f16155a0247def24822e1e91378089356c0791a7c59faaa

SHA512
be2d905ee729bb73fd2f6715a59e9faeb4c5684e0be0dcc3468cb89b249045266ceff561f9e647d62662a6912ae8c92939269c78e8cbafe757ebcc58ae861c55

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C:\Windows\CTS.exe
Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit