36d2f9895856391de8233c99c1423150615c9599e65ac17f2c413b20d7642261

Analysis

max time kernel
66s
max time network
54s
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 01:25

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General

Target

2024-04-28_13f2d4566e85fa27fe7ba72489372d98_bkransomware.exe
Size

96KB
MD5

13f2d4566e85fa27fe7ba72489372d98
SHA1

61a48041b730ded3f6f89866ba722e1025d2f914
SHA256

36d2f9895856391de8233c99c1423150615c9599e65ac17f2c413b20d7642261
SHA512

3cde615700c409291195d6118f5ae811d758e099f63985ad8a26866337c59c58839a1d4c4abb00b018681c2cc15d06a82cea3baf4092d5d695e34550edea4f53
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTez2sNIUU2tlyS8K2NRLB:ZRpAyazIliazTkjNJr8KGRl

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

lTjHjGgMleGAHfT.exeCTS.exe

pid process

1428 lTjHjGgMleGAHfT.exe
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

pid	process
1428	lTjHjGgMleGAHfT.exe
1092	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_13f2d4566e85fa27fe7ba72489372d98_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_13f2d4566e85fa27fe7ba72489372d98_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_13f2d4566e85fa27fe7ba72489372d98_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_13f2d4566e85fa27fe7ba72489372d98_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_13f2d4566e85fa27fe7ba72489372d98_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 408 2024-04-28_13f2d4566e85fa27fe7ba72489372d98_bkransomware.exe
Token: SeDebugPrivilege 1092 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_13f2d4566e85fa27fe7ba72489372d98_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	408	2024-04-28_13f2d4566e85fa27fe7ba72489372d98_bkransomware.exe
Token: SeDebugPrivilege	1092	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

2024-04-28_13f2d4566e85fa27fe7ba72489372d98_bkransomware.exe

description	pid	process	target process
PID 408 wrote to memory of 1428	408	2024-04-28_13f2d4566e85fa27fe7ba72489372d98_bkransomware.exe	lTjHjGgMleGAHfT.exe
PID 408 wrote to memory of 1428	408	2024-04-28_13f2d4566e85fa27fe7ba72489372d98_bkransomware.exe	lTjHjGgMleGAHfT.exe
PID 408 wrote to memory of 1092	408	2024-04-28_13f2d4566e85fa27fe7ba72489372d98_bkransomware.exe	CTS.exe
PID 408 wrote to memory of 1092	408	2024-04-28_13f2d4566e85fa27fe7ba72489372d98_bkransomware.exe	CTS.exe
PID 408 wrote to memory of 1092	408	2024-04-28_13f2d4566e85fa27fe7ba72489372d98_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_13f2d4566e85fa27fe7ba72489372d98_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_13f2d4566e85fa27fe7ba72489372d98_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:408

C:\Users\Admin\AppData\Local\Temp\lTjHjGgMleGAHfT.exe
C:\Users\Admin\AppData\Local\Temp\lTjHjGgMleGAHfT.exe
2⤵
- Executes dropped EXE
PID:1428

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 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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Filesize
392KB

MD5
902de5fd71f9dcfc304e72ca54b20b90

SHA1
6fc4fe828b16d40fdf0aee4f12cf71dfd103c141

SHA256
c3acdcb7a782f0fc31d963f3788d10c12953141778e4026506bd39dc6d1a3779

SHA512
31c2800419af1b1ecdbc222d6b1ca9f1789fcdf84b4ac3de7fc840bf7821aa8b7327a0e38eb3c15508125edf2564fb07a755ce62a18a7916077c5d5fb180312c

Download Submit
C:\Users\Admin\AppData\Local\Temp\lTjHjGgMleGAHfT.exe
Filesize
25KB

MD5
abbd49c180a2f8703f6306d6fa731fdc

SHA1
d63f4bfe7f74936b2fbace803e3da6103fbf6586

SHA256
5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1

SHA512
290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9

Download Submit
C:\Windows\CTS.exe
Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit
memory/1428-10-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download