2abcb4dd65063aabc4edf2a1183cf7206bb2412cbdd59ab27ea280e8b389f0b1

Analysis

max time kernel
149s
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
09/06/2024, 20:25

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General

Target
2024-06-09_0197b535d055dc366d0177905f3be91a_bkransomware.exe
Size 71KB
Sample240609-y69a9afc53
SHA256 2abcb4dd65063aabc4edf2a1183cf7206bb2412cbdd59ab27ea280e8b389f0b1
MD5 0197b535d055dc366d0177905f3be91a
SHA1 647921926087b49ee7ea2fee0709fc4b1a64d111
SHA512 2e229741b9d249c1491c1f3017212508149e2e871f8e9286e27d3e5f52b941ad76f7233730e40f40a4c61cf70f6938c45f11e2b8d06a6c586cd767eba21b10d1
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTH:ZRpAyazIliazTH
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4548	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"	2024-06-09_0197b535d055dc366d0177905f3be91a_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	2024-06-09_0197b535d055dc366d0177905f3be91a_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1808	2024-06-09_0197b535d055dc366d0177905f3be91a_bkransomware.exe
Token: SeDebugPrivilege	4548	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1808 wrote to memory of 4548	1808	2024-06-09_0197b535d055dc366d0177905f3be91a_bkransomware.exe	81
PID 1808 wrote to memory of 4548	1808	2024-06-09_0197b535d055dc366d0177905f3be91a_bkransomware.exe	81
PID 1808 wrote to memory of 4548	1808	2024-06-09_0197b535d055dc366d0177905f3be91a_bkransomware.exe	81

C:\Users\Admin\AppData\Local\Temp\2024-06-09_0197b535d055dc366d0177905f3be91a_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-09_0197b535d055dc366d0177905f3be91a_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1808
- 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:4548

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

Replay Monitor

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Downloads

excel.exe_Rules.xml

Path C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Size 393KB
SHA256 01b02a91d0e94bfad21f70f5e2ac1b2f452349e461e02fdd9f5bb1ad4d7f5934
MD5 f5eb0e702e8a25ce66e7634e1e71b1d1
SHA1 fb83204536e6d6eb306d97c208f2af945ba95f71
SHA512 b464bd2b6a10dc71931708a5c538124e83e219790f40a4afcccb9172a60a29bad9dfa16562f52204817125f5575cdf417502a99e32a5818d3fb3337a7aaa7485
SSDEEP 12288:xC01UBajLe3NlCAaHEJ6PSjHWw0AxVx0m+6eY5F:D1UBaOlZ6Po0KxP+6eY5F
MD5 SHA1 SHA512 SSDEEP

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5zxh9BnCcDxnOcJ.exe

Path C:\Users\Admin\AppData\Local\Temp\5zxh9BnCcDxnOcJ.exe
Size 71KB
SHA256 a8d220b080d85ecca73a78aeba36d683b2355efc4a9d57e48f7cdbe9f6c708d9
MD5 d5c5d3910a4d15bafd2eeca0baadd213
SHA1 b65c15f98656e494efcfa914d39b93f75b325775
SHA512 7d17f5a70dc634cf07d61874e7ca966b087a3225d25325b665ff606e749f59e6862651ed8df50b876e7fc014bee68204444085da7f9643b08bbe1d7505e5b5d8
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTZB:ZRpAyazIliazTZB
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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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads