9cca853c28018b1df9c14506ef8fee36406569406c94371ef9284e43bf99b434

Analysis

max time kernel
137s
max time network
106s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
02/06/2024, 22:25

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General

Target
2024-06-02_605490d742f5a1f45d6be13637454c6d_bkransomware.exe
Size 96KB
Sample240602-2bwy8aac69
SHA256 9cca853c28018b1df9c14506ef8fee36406569406c94371ef9284e43bf99b434
MD5 605490d742f5a1f45d6be13637454c6d
SHA1 329efc2028313b7c3a85383fedba2bb691d277ea
SHA512 360bd84a1b6dae194c15a4a21e633f251ce041e9afb8ba7e0dc198ca33e8d750a70a455ddd0ed7587f44367daf62730f3e3a42a5c99c4fea4808d3e5be7e5b48
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTTGdDPqq5AUigvN46C00:ZRpAyazIliazTTGdD8UnvNY00
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
2748	mRj5RFOGvR361t5.exe
2600	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"	2024-06-02_605490d742f5a1f45d6be13637454c6d_bkransomware.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\CTS.exe	2024-06-02_605490d742f5a1f45d6be13637454c6d_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3496	2024-06-02_605490d742f5a1f45d6be13637454c6d_bkransomware.exe
Token: SeDebugPrivilege	2600	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3496 wrote to memory of 2748	3496	2024-06-02_605490d742f5a1f45d6be13637454c6d_bkransomware.exe	83
PID 3496 wrote to memory of 2748	3496	2024-06-02_605490d742f5a1f45d6be13637454c6d_bkransomware.exe	83
PID 3496 wrote to memory of 2600	3496	2024-06-02_605490d742f5a1f45d6be13637454c6d_bkransomware.exe	84
PID 3496 wrote to memory of 2600	3496	2024-06-02_605490d742f5a1f45d6be13637454c6d_bkransomware.exe	84
PID 3496 wrote to memory of 2600	3496	2024-06-02_605490d742f5a1f45d6be13637454c6d_bkransomware.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-06-02_605490d742f5a1f45d6be13637454c6d_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-02_605490d742f5a1f45d6be13637454c6d_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3496
- C:\Users\Admin\AppData\Local\Temp\mRj5RFOGvR361t5.exe
  C:\Users\Admin\AppData\Local\Temp\mRj5RFOGvR361t5.exe
  2⤵
  - Executes dropped EXE
  PID:2748
- 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:2600

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 2a775b8e761b33fd7daa77beee0542519270ad0124d91f97b9d873d547fd3bd5
MD5 92a7e1bbabf8f03346c21ef899e54315
SHA1 f8502c8ab712c75a3366b7e871c84bf0573ed6db
SHA512 1126c5e955eb5aa283d3d6b97478fadac17fa7a6ff87164d636bd5e7872f29be755b03b817c7e5adf5e837345bb509ae0af673bdf0bfbae7a05e2f1b12f94962
SSDEEP 6144:xZ8azmoFjglBW5UfcFY7gbznymhGBh61so6eBaUpjJc7M/W5+D5F1Akmwg7Ku:xC0n6C5F5nymkOtzAUGZmF1SKu
MD5 SHA1 SHA512 SSDEEP

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mRj5RFOGvR361t5.exe

Path C:\Users\Admin\AppData\Local\Temp\mRj5RFOGvR361t5.exe
Size 25KB
SHA256 5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1
MD5 abbd49c180a2f8703f6306d6fa731fdc
SHA1 d63f4bfe7f74936b2fbace803e3da6103fbf6586
SHA512 290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9
SSDEEP 384:OSZ/JKNZKZCGRHJPth4VKAvDgDJgoku8:OSQQTRJPzkKAEN
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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memory/2748-9-0x0000000000400000-0x000000000040D000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads