61c45ca0720b94275db9e328b765db809cf5da1d2b14e420ff574d62ee52f8b0

Analysis

max time kernel
134s
max time network
124s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
03/06/2024, 21:43

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General

Target
2024-06-03_cd396a6ac8e60f722c33c712fa7259a2_bkransomware.exe
Size 96KB
Sample240603-1lb65aaa5z
SHA256 61c45ca0720b94275db9e328b765db809cf5da1d2b14e420ff574d62ee52f8b0
MD5 cd396a6ac8e60f722c33c712fa7259a2
SHA1 b611ca50178a67f3aace0ec48ae3bf3d0f26ffb2
SHA512 2d2052153b2b571aa0dcba4ff64a66a2db98e236bcbd364279b5a1ea9e9420902c68c38e7d11e0ea1be5a14da5c8dd87a3107267ef7d4b945aebb4331ddcf5bf
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazThgTDUvBS2EWMOiDKn0uQaYo:ZRpAyazIliazT6DUfEWziJdaYo
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
1172	2uh1RZJEgfWnbu8.exe
1408	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"	CTS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-06-03_cd396a6ac8e60f722c33c712fa7259a2_bkransomware.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\CTS.exe	2024-06-03_cd396a6ac8e60f722c33c712fa7259a2_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3224	2024-06-03_cd396a6ac8e60f722c33c712fa7259a2_bkransomware.exe
Token: SeDebugPrivilege	1408	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3224 wrote to memory of 1172	3224	2024-06-03_cd396a6ac8e60f722c33c712fa7259a2_bkransomware.exe	83
PID 3224 wrote to memory of 1172	3224	2024-06-03_cd396a6ac8e60f722c33c712fa7259a2_bkransomware.exe	83
PID 3224 wrote to memory of 1408	3224	2024-06-03_cd396a6ac8e60f722c33c712fa7259a2_bkransomware.exe	85
PID 3224 wrote to memory of 1408	3224	2024-06-03_cd396a6ac8e60f722c33c712fa7259a2_bkransomware.exe	85
PID 3224 wrote to memory of 1408	3224	2024-06-03_cd396a6ac8e60f722c33c712fa7259a2_bkransomware.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-06-03_cd396a6ac8e60f722c33c712fa7259a2_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-03_cd396a6ac8e60f722c33c712fa7259a2_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3224
- C:\Users\Admin\AppData\Local\Temp\2uh1RZJEgfWnbu8.exe
  C:\Users\Admin\AppData\Local\Temp\2uh1RZJEgfWnbu8.exe
  2⤵
  - Executes dropped EXE
  PID:1172
- 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:1408

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 392KB
SHA256 cd3a5fdcb5fe2c152fb0dd9b00919065d98e51756c8409f768d26a10a4d38c5c
MD5 a0fcb598214c4ca2ae50e8ffaa9957c4
SHA1 eb0ea4f56a6b6ca355de4f924f2097401b3f8e74
SHA512 8946bf311b68c911230ddcfbb31e504815c3468f546860f1e6575e937a4411918dde238f3de2cced7b1bd6e88ee9def314b0ae913f3657bfd3410dfaf267bc62
SSDEEP 6144:xZ8azl8OHo8TlaZNUe7LvBPRPNVFlm1vBTnzvp2g58Bj1bF:xC0lLHTqTFlmVBTzAg2V
MD5 SHA1 SHA512 SSDEEP

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2uh1RZJEgfWnbu8.exe

Path C:\Users\Admin\AppData\Local\Temp\2uh1RZJEgfWnbu8.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/1172-10-0x0000000000400000-0x000000000040D000-memory.dmp

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Analysis

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General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads