406acdd2a2440281e98e8dc33e8722f8abaf3682458a44a0e3871ef118b2dc48

Analysis

max time kernel
55s
max time network
53s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
28-04-2024 19:35

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General

Target

2024-04-28_df1bcc4000ff0396a29122c9cc54cb38_bkransomware.exe
Size

96KB
MD5

df1bcc4000ff0396a29122c9cc54cb38
SHA1

3af6f768ebde16c1459fe8c038962be1d1caa34f
SHA256

406acdd2a2440281e98e8dc33e8722f8abaf3682458a44a0e3871ef118b2dc48
SHA512

0167f9d6ab43878071db24d958463e33be2f857fa260d41fdfc007ba6018e3a39bee6447ae28de3ad7d00dd1ec3f6e009115c3058c2120b4a90941aaf3ec29f4
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTZEmqZ2BvAvi7kqbTy:ZhpAyazIlyazTmmqZ2Bvq2Fb2

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

WhDK2p7UKJxZP7b.exeCTS.exe

pid process

4484 WhDK2p7UKJxZP7b.exe
4592 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

pid	process
4484	WhDK2p7UKJxZP7b.exe
4592	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-04-28_df1bcc4000ff0396a29122c9cc54cb38_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-04-28_df1bcc4000ff0396a29122c9cc54cb38_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

Processes:

2024-04-28_df1bcc4000ff0396a29122c9cc54cb38_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_df1bcc4000ff0396a29122c9cc54cb38_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_df1bcc4000ff0396a29122c9cc54cb38_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 1532 2024-04-28_df1bcc4000ff0396a29122c9cc54cb38_bkransomware.exe
Token: SeDebugPrivilege 4592 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_df1bcc4000ff0396a29122c9cc54cb38_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	1532	2024-04-28_df1bcc4000ff0396a29122c9cc54cb38_bkransomware.exe
Token: SeDebugPrivilege	4592	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

2024-04-28_df1bcc4000ff0396a29122c9cc54cb38_bkransomware.exe

description	pid	process	target process
PID 1532 wrote to memory of 4484	1532	2024-04-28_df1bcc4000ff0396a29122c9cc54cb38_bkransomware.exe	WhDK2p7UKJxZP7b.exe
PID 1532 wrote to memory of 4484	1532	2024-04-28_df1bcc4000ff0396a29122c9cc54cb38_bkransomware.exe	WhDK2p7UKJxZP7b.exe
PID 1532 wrote to memory of 4592	1532	2024-04-28_df1bcc4000ff0396a29122c9cc54cb38_bkransomware.exe	CTS.exe
PID 1532 wrote to memory of 4592	1532	2024-04-28_df1bcc4000ff0396a29122c9cc54cb38_bkransomware.exe	CTS.exe
PID 1532 wrote to memory of 4592	1532	2024-04-28_df1bcc4000ff0396a29122c9cc54cb38_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_df1bcc4000ff0396a29122c9cc54cb38_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_df1bcc4000ff0396a29122c9cc54cb38_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1532

C:\Users\Admin\AppData\Local\Temp\WhDK2p7UKJxZP7b.exe
C:\Users\Admin\AppData\Local\Temp\WhDK2p7UKJxZP7b.exe
2⤵
- Executes dropped EXE
PID:4484

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:4592

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Filesize
394KB

MD5
225505b78d5526c7f97b9c33207f4cf4

SHA1
1a9e90691470fcf9bb740ee5eeb2f423ea72cb32

SHA256
12f58602b8b71a1453fc719bfd9684af5db1dacbd7b737966bce517471001e12

SHA512
ba1104edf840898c3c5569cc7edcd1d6d7bdaef76fd43fa28a91be49acc0f2183d2a0d9b7b3b1a1945fed7a2485fc65b75e118ab583eb0668c4c1a00930f06c6

Download Submit
C:\Users\Admin\AppData\Local\Temp\WhDK2p7UKJxZP7b.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/4484-9-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads