3a1d634ce2e8b81391d7cff95b0ecd6f5f8fb8ea3a3525ce1d4ad37b1b4c3b88

Analysis

max time kernel
148s
max time network
152s
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, 18:22

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General

Target
2024-06-01_1106741d705192a46a939c0f656f243f_bkransomware.exe
Size 96KB
Sample240601-w1a56abf45
SHA256 3a1d634ce2e8b81391d7cff95b0ecd6f5f8fb8ea3a3525ce1d4ad37b1b4c3b88
MD5 1106741d705192a46a939c0f656f243f
SHA1 7e17e33ab4f175bb6c75fc7236c8893277c9fc24
SHA512 67ee65e68fde51e9587444a5509fdaf82804f2a7472c855362563261fbe9714e8bd9abdecfdd34a3b10b7b8bcefddc940b54033dc6e65d5768d7de32b3459267
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTH0Ap0ZVV+UTn88CuQIP:ZRpAyazIliazTHrO+U9QU
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
1800	0AeWtBYJj8NDFpp.exe
3616	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_1106741d705192a46a939c0f656f243f_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_1106741d705192a46a939c0f656f243f_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1868	2024-06-01_1106741d705192a46a939c0f656f243f_bkransomware.exe
Token: SeDebugPrivilege	3616	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1868 wrote to memory of 1800	1868	2024-06-01_1106741d705192a46a939c0f656f243f_bkransomware.exe	81
PID 1868 wrote to memory of 1800	1868	2024-06-01_1106741d705192a46a939c0f656f243f_bkransomware.exe	81
PID 1868 wrote to memory of 3616	1868	2024-06-01_1106741d705192a46a939c0f656f243f_bkransomware.exe	83
PID 1868 wrote to memory of 3616	1868	2024-06-01_1106741d705192a46a939c0f656f243f_bkransomware.exe	83
PID 1868 wrote to memory of 3616	1868	2024-06-01_1106741d705192a46a939c0f656f243f_bkransomware.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-06-01_1106741d705192a46a939c0f656f243f_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-01_1106741d705192a46a939c0f656f243f_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1868
- C:\Users\Admin\AppData\Local\Temp\0AeWtBYJj8NDFpp.exe
  C:\Users\Admin\AppData\Local\Temp\0AeWtBYJj8NDFpp.exe
  2⤵
  - Executes dropped EXE
  PID:1800
- 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:3616

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 1d5b05c58cc976a1a39999f7a74312ae175e608931d5392c56e28b042c946d11
MD5 a66d0f38c41ab9aa2d1e2a0f0d580a0b
SHA1 77b6a224108b827c5f80dd14834721de19620024
SHA512 21e277ec66599e018ec457956a57edf38b92733e889ac1a6de360d6671f4a1184955a9491a06fb00efd8f5b5722d8e658bc52f5219d91ebd338c1fb33e4b3bb6
SSDEEP 6144:xZ8azY0mV58cdzZg2uUwBx5p34O8IH2WdOR2mRW0CFM:xC0YD5JtgBD1pZ8IWWvmRG2
MD5 SHA1 SHA512 SSDEEP

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0AeWtBYJj8NDFpp.exe

Path C:\Users\Admin\AppData\Local\Temp\0AeWtBYJj8NDFpp.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/1800-8-0x0000000000400000-0x000000000040D000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads