2974dfd460538944a9163cce60afc3b2d0e0a800f707cbb27afc13fda4208e67

Analysis

max time kernel
93s
max time network
95s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
01/06/2024, 15:44

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General

Target
2024-06-01_a7d7cc78df4b81a026f14375c1eebcde_bkransomware.exe
Size 135KB
Sample240601-s6jspsge42
SHA256 2974dfd460538944a9163cce60afc3b2d0e0a800f707cbb27afc13fda4208e67
MD5 a7d7cc78df4b81a026f14375c1eebcde
SHA1 0d4b0a726ef565fc1afe67f657930a6ea6fc4727
SHA512 82c6755ceb9049fe0898af3fc416cd892c1dc61a9bc169d812326f1404e10841827a88b467042c970018e4b70a6d3315c6fccb8eaa75d617fe94c865e5ee5c1a
SSDEEP 3072:ZRpAyazIliazTaOmBno0pKB2oDO44jpAJP:xZ8azm/n1KV62P
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
4312	qKBAVyrM3TZk5IF.exe
3596	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"	2024-06-01_a7d7cc78df4b81a026f14375c1eebcde_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	2024-06-01_a7d7cc78df4b81a026f14375c1eebcde_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3168	2024-06-01_a7d7cc78df4b81a026f14375c1eebcde_bkransomware.exe
Token: SeDebugPrivilege	3596	CTS.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3168 wrote to memory of 4312	3168	2024-06-01_a7d7cc78df4b81a026f14375c1eebcde_bkransomware.exe	81
PID 3168 wrote to memory of 4312	3168	2024-06-01_a7d7cc78df4b81a026f14375c1eebcde_bkransomware.exe	81
PID 3168 wrote to memory of 4312	3168	2024-06-01_a7d7cc78df4b81a026f14375c1eebcde_bkransomware.exe	81
PID 3168 wrote to memory of 3596	3168	2024-06-01_a7d7cc78df4b81a026f14375c1eebcde_bkransomware.exe	83
PID 3168 wrote to memory of 3596	3168	2024-06-01_a7d7cc78df4b81a026f14375c1eebcde_bkransomware.exe	83
PID 3168 wrote to memory of 3596	3168	2024-06-01_a7d7cc78df4b81a026f14375c1eebcde_bkransomware.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-06-01_a7d7cc78df4b81a026f14375c1eebcde_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-01_a7d7cc78df4b81a026f14375c1eebcde_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3168
- C:\Users\Admin\AppData\Local\Temp\qKBAVyrM3TZk5IF.exe
  C:\Users\Admin\AppData\Local\Temp\qKBAVyrM3TZk5IF.exe
  2⤵
  - Executes dropped EXE
  PID:4312
- 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:3596

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 395KB
SHA256 0e10341efa2f2d67af3c7b85c279e7a53a0195c9f80c9ea5e80b2fd1b3887fa4
MD5 8b9cc1987662cb183ef6d6413891a47d
SHA1 75d2aa44b6624f806112706d699dff142d68acf5
SHA512 3864a609a90cc55573185c0286c332c94fec77855e8343bf25483a714f8d9a53f603c88d354325d861a71c4eb037c93c60a08b1b59b0c086e79f17bda619561a
SSDEEP 12288:xC0yLF5t0rYuxlwg5Mlnik68NMCZw4BuM:DqKr6g5SZ68VO4BuM
MD5 SHA1 SHA512 SSDEEP

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qKBAVyrM3TZk5IF.exe

Path C:\Users\Admin\AppData\Local\Temp\qKBAVyrM3TZk5IF.exe
Size 64KB
SHA256 75f12ea2f30d9c0d872dade345f30f562e6d93847b6a509ba53beec6d0b2c346
MD5 a32a382b8a5a906e03a83b4f3e5b7a9b
SHA1 11e2bdd0798761f93cce363329996af6c17ed796
SHA512 ec87dd957be21b135212454646dcabdd7ef9442cf714e2c1f6b42b81f0c3fa3b1875bde9a8b538e8a0aa2190225649c29e9ed0f25176e7659e55e422dd4efe4c
SSDEEP 768:2jfnJFqNSkejOy27eW2Vef/7yX3jFICnFfvoUs49RsS98Pu4TNz14GAeRgxQ:ufnLq01weW5yX3jFxv49Nu4GhQ
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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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads