1f3ff5ca9685b50c282758fcda0f904d595bb92dc2f9a7f54edcd9d0f1a756eb

Analysis

max time kernel
95s
max time network
97s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
05/06/2024, 00:28

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General

Target

2024-06-05_4b1bc9e0203d34f933925074cbee6acd_bkransomware.exe
Size

96KB
MD5

4b1bc9e0203d34f933925074cbee6acd
SHA1

239b6e827e1cd41ebd9d2205f7346f0081a2f6be
SHA256

1f3ff5ca9685b50c282758fcda0f904d595bb92dc2f9a7f54edcd9d0f1a756eb
SHA512

cce7d7445d1b4a1f23342aae0a97e2e4645a900b0a9cedcc566c1474e15322cbac64455cfd16466668b4aeae33b84490bf6f78cb357d8b7085436a767933fa01
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTykEwsClOZrUQoRSkUlHuX:ZRpAyazIliazTydoOZr/9K

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
1696	J5u19A40WzjxTCl.exe
3284	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"	2024-06-05_4b1bc9e0203d34f933925074cbee6acd_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	2024-06-05_4b1bc9e0203d34f933925074cbee6acd_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4676	2024-06-05_4b1bc9e0203d34f933925074cbee6acd_bkransomware.exe
Token: SeDebugPrivilege	3284	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4676 wrote to memory of 1696	4676	2024-06-05_4b1bc9e0203d34f933925074cbee6acd_bkransomware.exe	81
PID 4676 wrote to memory of 1696	4676	2024-06-05_4b1bc9e0203d34f933925074cbee6acd_bkransomware.exe	81
PID 4676 wrote to memory of 3284	4676	2024-06-05_4b1bc9e0203d34f933925074cbee6acd_bkransomware.exe	83
PID 4676 wrote to memory of 3284	4676	2024-06-05_4b1bc9e0203d34f933925074cbee6acd_bkransomware.exe	83
PID 4676 wrote to memory of 3284	4676	2024-06-05_4b1bc9e0203d34f933925074cbee6acd_bkransomware.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-06-05_4b1bc9e0203d34f933925074cbee6acd_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-05_4b1bc9e0203d34f933925074cbee6acd_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4676
- C:\Users\Admin\AppData\Local\Temp\J5u19A40WzjxTCl.exe
  C:\Users\Admin\AppData\Local\Temp\J5u19A40WzjxTCl.exe
  2⤵
  - Executes dropped EXE
  PID:1696
- 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:3284

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
392KB

MD5
74ab46f8bfdcf3a1a36d6849a580df12

SHA1
ba10b05d4a412a7f1d498344b302dc3d66293db3

SHA256
5abc0692dd68aaacfaec5434323253e64c62e51551cb405ea248e898009e5716

SHA512
246bcec246f0fbe3b07f93a479cb4096fba456dbfecdd0eff112f36a484f824ecf712dec8b7402f6a76941966d73a937ff454609cb0e31fd60dba19ce0bb8767

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C:\Users\Admin\AppData\Local\Temp\J5u19A40WzjxTCl.exe

Filesize
25KB

MD5
abbd49c180a2f8703f6306d6fa731fdc

SHA1
d63f4bfe7f74936b2fbace803e3da6103fbf6586

SHA256
5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1

SHA512
290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9

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C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

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memory/1696-12-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads