656baa2cb933e9ef4ddf10eeea8612cb59d422ea4192e64be5cf649924a064fb

Analysis

max time kernel
41s
max time network
50s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
05/07/2024, 02:31

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General

Target

2024-07-05_7d17c2148c09a8d9e88fffcbb810329a_bkransomware.exe
Size

71KB
MD5

7d17c2148c09a8d9e88fffcbb810329a
SHA1

cc1feb0bb0ea3a1a23a3ae3085fcea2e2af43c09
SHA256

656baa2cb933e9ef4ddf10eeea8612cb59d422ea4192e64be5cf649924a064fb
SHA512

bf8dce5531e652c08171b041489601a77ef236f6c7c323d52773298c414665a3a37252b896c70775c35986499499fe40f400e0045c8c2425be6246d502df5e27
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT9:ZRpAyazIliazT9

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2096	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"	2024-07-05_7d17c2148c09a8d9e88fffcbb810329a_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	2024-07-05_7d17c2148c09a8d9e88fffcbb810329a_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3632	2024-07-05_7d17c2148c09a8d9e88fffcbb810329a_bkransomware.exe
Token: SeDebugPrivilege	2096	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3632 wrote to memory of 2096	3632	2024-07-05_7d17c2148c09a8d9e88fffcbb810329a_bkransomware.exe	81
PID 3632 wrote to memory of 2096	3632	2024-07-05_7d17c2148c09a8d9e88fffcbb810329a_bkransomware.exe	81
PID 3632 wrote to memory of 2096	3632	2024-07-05_7d17c2148c09a8d9e88fffcbb810329a_bkransomware.exe	81

C:\Users\Admin\AppData\Local\Temp\2024-07-05_7d17c2148c09a8d9e88fffcbb810329a_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-07-05_7d17c2148c09a8d9e88fffcbb810329a_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3632
- 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:2096

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
5a8a1cec0fc3a684f3712852eb53039d

SHA1
8914bb76042012f23da79fea3545b354993a9a5b

SHA256
70a8524ef82f18002217d4697a4fed8dddbc5f8746671594685cc38bd6f724de

SHA512
e6976eeea562e5f0144adcf6a16692521d1ce61a477d8c8dedc7e70732cc5e265ba64e38b60d4048780d86185b9bec5207ae81c4ad11569dcff3914b9270ab24

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C:\Users\Admin\AppData\Local\Temp\F2tYzypGiBpESfx.exe

Filesize
71KB

MD5
43a8d0fee879c995f3d5ae01af807f76

SHA1
37e188461cb8b54ccca42a5628572649d42dc1b6

SHA256
f7268e40eb1a1d4b1e7f4700200bd7120773d8bf3267c56305c2f13cf9c2a864

SHA512
18aaa21fc836730e83f4791e1e3d44ce5b8cead755c26286d08e315c6210a904ebb2359bc4b24155b0ce7d5a080b252093d22cde9c07b4cac3295b9f18ee6797

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C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads