a4fb338f9b0835ee7f43ddf1aa6a5687119a4cb3a70a41828998de7d5c23c659

Analysis

max time kernel
147s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
04/07/2024, 18:51

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General

Target

2024-07-04_47604d39b4af645d5933728d075861c8_bkransomware.exe
Size

76KB
MD5

47604d39b4af645d5933728d075861c8
SHA1

17c09b3500572e7c6b7ef37c77b1745608d9ecee
SHA256

a4fb338f9b0835ee7f43ddf1aa6a5687119a4cb3a70a41828998de7d5c23c659
SHA512

7da6d391c50b8fad42a58a5289b9775a0be004b8be8711e8dbc46d493fda318d672acabe77fe1f7bbfbbf693d3e7a785e1ffdf4ebb3f0976bdda1bcb0cdde44c
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTCxFz:ZRpAyazIliazTCTz

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1092	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"	2024-07-04_47604d39b4af645d5933728d075861c8_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	2024-07-04_47604d39b4af645d5933728d075861c8_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2340	2024-07-04_47604d39b4af645d5933728d075861c8_bkransomware.exe
Token: SeDebugPrivilege	1092	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2340 wrote to memory of 1092	2340	2024-07-04_47604d39b4af645d5933728d075861c8_bkransomware.exe	80
PID 2340 wrote to memory of 1092	2340	2024-07-04_47604d39b4af645d5933728d075861c8_bkransomware.exe	80
PID 2340 wrote to memory of 1092	2340	2024-07-04_47604d39b4af645d5933728d075861c8_bkransomware.exe	80

C:\Users\Admin\AppData\Local\Temp\2024-07-04_47604d39b4af645d5933728d075861c8_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-07-04_47604d39b4af645d5933728d075861c8_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2340
- 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:1092

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
394KB

MD5
b4481d97433493c2dcc4b8be6de41f64

SHA1
ea6fae4fc8c1176611c51db180e120774ebbf428

SHA256
2fed8861001760672ff432640501898c3433e1fb217a696b60549f61b0b83532

SHA512
27570f903ee2c14bbcc83d72192272c79ee6ba18198b282835fa17609774f70887362f2583bf3e110d71be428a921aee918b2db734a0738e4ec16295c114d746

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C:\Users\Admin\AppData\Local\Temp\TM7MWEaSH9Inm6c.exe

Filesize
76KB

MD5
0e61d30aabdede8722b45d8e73ba87a8

SHA1
d62c3a234dabb635dcf797e91da7ba9e2d3a30e6

SHA256
b4ac4c0f6e9548fa6d3d936aeb2550a28c376950e382d1004dbc771f6eeb81f9

SHA512
000709b0a74854f8d4594065e02346c7d329d2272e0695988b058f65e33705f0abeb0ef488a812c06de907dc56a3561d59be7c329df00cddcd37e6306a577f38

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C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads