5093c8916daf1e738551351266da6d280e2cf8a2c337d38300ec5d9c75417ea9

Analysis

max time kernel
133s
max time network
101s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
04-05-2024 20:45

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General

Target

2024-05-04_f7c902457767767088c93376ed5f6cad_bkransomware.exe
Size

144KB
MD5

f7c902457767767088c93376ed5f6cad
SHA1

6eaf7ba972b42b714a88846c8670424cf6d3075c
SHA256

5093c8916daf1e738551351266da6d280e2cf8a2c337d38300ec5d9c75417ea9
SHA512

dbdc8cad07519f88eece3b09e0045d392df760d1aafb3003ec5bff4450bff9873e1a08578e587c0a45ca19f04c1efc3ae3affeb9a8fa8707e7a7a4f8a57a9620
SSDEEP

3072:ZhpAyazIlyazTkfklOd+kOPbvMwPPAbNp:hZMazo8lE+TPbnwp

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
1412	eiX0tEUK3FcHgr2.exe
1636	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"	2024-05-04_f7c902457767767088c93376ed5f6cad_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	2024-05-04_f7c902457767767088c93376ed5f6cad_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	224	2024-05-04_f7c902457767767088c93376ed5f6cad_bkransomware.exe
Token: SeDebugPrivilege	1636	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 224 wrote to memory of 1412	224	2024-05-04_f7c902457767767088c93376ed5f6cad_bkransomware.exe	84
PID 224 wrote to memory of 1412	224	2024-05-04_f7c902457767767088c93376ed5f6cad_bkransomware.exe	84
PID 224 wrote to memory of 1636	224	2024-05-04_f7c902457767767088c93376ed5f6cad_bkransomware.exe	86
PID 224 wrote to memory of 1636	224	2024-05-04_f7c902457767767088c93376ed5f6cad_bkransomware.exe	86
PID 224 wrote to memory of 1636	224	2024-05-04_f7c902457767767088c93376ed5f6cad_bkransomware.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-05-04_f7c902457767767088c93376ed5f6cad_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-04_f7c902457767767088c93376ed5f6cad_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:224
- C:\Users\Admin\AppData\Local\Temp\eiX0tEUK3FcHgr2.exe
  C:\Users\Admin\AppData\Local\Temp\eiX0tEUK3FcHgr2.exe
  2⤵
  - Executes dropped EXE
  PID:1412
- 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:1636

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

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

Filesize
394KB

MD5
dd181e908fa4f01a565e46af9793f259

SHA1
0fb2678d6485c3ca6108fc7f044a936117a45766

SHA256
31a84214075df581c798730140e5b9f9efe2be1c3666690240e14dca903b82c6

SHA512
26c4f712949d9665ecf4cc917d3b0e3225c89af69dc2e78dde03925382f3c90fede998ff3267dd0268cf0192192c5ee8a134b42c44ddda0f857e065c7c040d3c

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C:\Users\Admin\AppData\Local\Temp\eiX0tEUK3FcHgr2.exe

Filesize
73KB

MD5
d2778164ef643ba8f44cc202ec7ef157

SHA1
31eee7114eed6b0d2fb77c9f3605057639050786

SHA256
28b001bb9a72ae7a24242bfab248d767a1ac5dec981c672a3944f7a072375e9a

SHA512
cb2a5a2aeba9d6f6bfc4a3a4576961244c109aafb59f02134b03ebac4d16602ee7f141cc4adc519f15030c20e7e7d6585778870706b2ea4c74c1161729101635

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads