3d11a8af9837dd782817e1db0b9c7c26d98e9ba7feed90d1517a62c25b5dda2b

Analysis

max time kernel
93s
max time network
95s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
27/06/2024, 19:21

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General

Target

2024-06-27_ef1948a6f204b0a7d825a06748f9b643_bkransomware.exe
Size

96KB
MD5

ef1948a6f204b0a7d825a06748f9b643
SHA1

17efeb88994006c3e074cfea8fa9d63f78d27aa2
SHA256

3d11a8af9837dd782817e1db0b9c7c26d98e9ba7feed90d1517a62c25b5dda2b
SHA512

35481fc13040a832e390d8a9b5ead96924c62a95c2f5a69a524f3da87184683909993a1b25cea0c89dbc9818ac916c4ee1f7907ec44e508011a62b195cd137bb
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazT9Gf4OQu05dNzBxso:ZhpAyazIlyazTQ4OQu03Nzfso

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
4592	tTe5xTQj2lcenkv.exe
4728	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"	2024-06-27_ef1948a6f204b0a7d825a06748f9b643_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	2024-06-27_ef1948a6f204b0a7d825a06748f9b643_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3456	2024-06-27_ef1948a6f204b0a7d825a06748f9b643_bkransomware.exe
Token: SeDebugPrivilege	4728	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3456 wrote to memory of 4592	3456	2024-06-27_ef1948a6f204b0a7d825a06748f9b643_bkransomware.exe	81
PID 3456 wrote to memory of 4592	3456	2024-06-27_ef1948a6f204b0a7d825a06748f9b643_bkransomware.exe	81
PID 3456 wrote to memory of 4728	3456	2024-06-27_ef1948a6f204b0a7d825a06748f9b643_bkransomware.exe	82
PID 3456 wrote to memory of 4728	3456	2024-06-27_ef1948a6f204b0a7d825a06748f9b643_bkransomware.exe	82
PID 3456 wrote to memory of 4728	3456	2024-06-27_ef1948a6f204b0a7d825a06748f9b643_bkransomware.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-06-27_ef1948a6f204b0a7d825a06748f9b643_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-27_ef1948a6f204b0a7d825a06748f9b643_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3456
- C:\Users\Admin\AppData\Local\Temp\tTe5xTQj2lcenkv.exe
  C:\Users\Admin\AppData\Local\Temp\tTe5xTQj2lcenkv.exe
  2⤵
  - Executes dropped EXE
  PID:4592
- 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:4728

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
bfafd21e7d7dd9567441a3f10c4c2dd5

SHA1
5bac52786e3fc5685998fe380eca38407d19e8be

SHA256
ac188645f8fca57054acd5d97d930f0e643e770be84d1f0e1d43ae118b971c24

SHA512
76f8fcc31e1201fb7afa9194b4c314b8f3fd29a32df7805b93ccf24060da53f132319165667badefd8093f39e11839cc18cfa491ee1652144838d6674a6fd986

Download Submit
C:\Users\Admin\AppData\Local\Temp\tTe5xTQj2lcenkv.exe

Filesize
25KB

MD5
abbd49c180a2f8703f6306d6fa731fdc

SHA1
d63f4bfe7f74936b2fbace803e3da6103fbf6586

SHA256
5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1

SHA512
290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit
memory/4592-11-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads