aac190af5ea113090c3089cdee31da527f12137f0f9c4f1f973ad5d6e9a255cb

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
submitted
04/07/2024, 18:45

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General

Target

2024-07-04_0fa2da416e2718b89707f0ec9186b975_bkransomware.exe
Size

257KB
MD5

0fa2da416e2718b89707f0ec9186b975
SHA1

27237b93aed2ba69a467fe88f8a4342249fd45ca
SHA256

aac190af5ea113090c3089cdee31da527f12137f0f9c4f1f973ad5d6e9a255cb
SHA512

b985b00c5973fff26b65ec972e955cc3daa7af289959233049785a256409030f9eca7dd9530df7f227a78bd1a7709a6d713b31ea4ae636c4867a723f09a7c44b
SSDEEP

6144:hZMazkQpioQbhckVQ4MX7Op/J10iUfHui+:hS0p0ogHMLOt0iD

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
4924	BIrMwoc1py8M7u8.exe
552	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"	CTS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-07-04_0fa2da416e2718b89707f0ec9186b975_bkransomware.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\CTS.exe	2024-07-04_0fa2da416e2718b89707f0ec9186b975_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1516	2024-07-04_0fa2da416e2718b89707f0ec9186b975_bkransomware.exe
Token: SeDebugPrivilege	552	CTS.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1516 wrote to memory of 4924	1516	2024-07-04_0fa2da416e2718b89707f0ec9186b975_bkransomware.exe	82
PID 1516 wrote to memory of 4924	1516	2024-07-04_0fa2da416e2718b89707f0ec9186b975_bkransomware.exe	82
PID 1516 wrote to memory of 4924	1516	2024-07-04_0fa2da416e2718b89707f0ec9186b975_bkransomware.exe	82
PID 1516 wrote to memory of 552	1516	2024-07-04_0fa2da416e2718b89707f0ec9186b975_bkransomware.exe	83
PID 1516 wrote to memory of 552	1516	2024-07-04_0fa2da416e2718b89707f0ec9186b975_bkransomware.exe	83
PID 1516 wrote to memory of 552	1516	2024-07-04_0fa2da416e2718b89707f0ec9186b975_bkransomware.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-07-04_0fa2da416e2718b89707f0ec9186b975_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-07-04_0fa2da416e2718b89707f0ec9186b975_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1516
- C:\Users\Admin\AppData\Local\Temp\BIrMwoc1py8M7u8.exe
  C:\Users\Admin\AppData\Local\Temp\BIrMwoc1py8M7u8.exe
  2⤵
  - Executes dropped EXE
  PID:4924
- 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:552

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
ad8aafd38e139404fad959d5b2280d1b

SHA1
05d9d9d75554fc3464158f733456e2b036592e1a

SHA256
3440a2ee57776c298a29ce265301eac079a8cb2474b15273ee0b73bfda729b12

SHA512
069b9f05301d19379968fb0b988aad6c0dc1de977982707e203652d8eb150dab4d86c261bc30ecfcce8f7f49d6ffee8b96a5c750397172860a4acda49e43dfa8

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C:\Users\Admin\AppData\Local\Temp\BIrMwoc1py8M7u8.exe

Filesize
186KB

MD5
2124a793ac7d675e1b2d5fdee19a87d0

SHA1
3a1a6ae7c218e41c4eb303c548db9ec06bd6a6b5

SHA256
1aa3927c7985386d42759656665c7b422ee226df16a19446af6d9a6613b8ae9b

SHA512
d5b7b789108c00901e96a3f336c2176a6e7f50e73cb485974e8bb7af1b513b099e88eb6800ed1f0c53969a86a6870130a477c9b17cad0e00f9de4ac90252e051

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads