a4191f6414d843d81605a0612da6e2734021914f89bc7d51c9a15597e9d9139d

Analysis

max time kernel
134s
max time network
104s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
03/05/2024, 19:32

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General

Target

2024-05-03_94a0f3f3f540884ac684d34da4ea4937_bkransomware.exe
Size

71KB
MD5

94a0f3f3f540884ac684d34da4ea4937
SHA1

8536ce95167a027aa62780318cf393b5038c276b
SHA256

a4191f6414d843d81605a0612da6e2734021914f89bc7d51c9a15597e9d9139d
SHA512

0fd69b89e6d146c6e3ae460485f3eadcc962a0687091c4b34ae4a8fd1858bdf156c9dc62eac1885ac9f855fed12285bc2ae61f23a991f4866b143f2cb38b0381
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT5:ZRpAyazIliazT5

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1944	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"	2024-05-03_94a0f3f3f540884ac684d34da4ea4937_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	2024-05-03_94a0f3f3f540884ac684d34da4ea4937_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3272	2024-05-03_94a0f3f3f540884ac684d34da4ea4937_bkransomware.exe
Token: SeDebugPrivilege	1944	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3272 wrote to memory of 1944	3272	2024-05-03_94a0f3f3f540884ac684d34da4ea4937_bkransomware.exe	83
PID 3272 wrote to memory of 1944	3272	2024-05-03_94a0f3f3f540884ac684d34da4ea4937_bkransomware.exe	83
PID 3272 wrote to memory of 1944	3272	2024-05-03_94a0f3f3f540884ac684d34da4ea4937_bkransomware.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-03_94a0f3f3f540884ac684d34da4ea4937_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-03_94a0f3f3f540884ac684d34da4ea4937_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3272
- 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:1944

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
392KB

MD5
5ad883d04306f1dc2f34117e06cad3b3

SHA1
4fff81c822561c94bd488781979eaf2f95ce4472

SHA256
14cadc0d1bcc1c549fb79ac41937f1a7ca701ef8b2aec3f01f552535d6fe424d

SHA512
882b84c5b6c1234c23ddb3ccaf0d0b30d42e8c26d24a540b15e462a5b1b0d6ea1dc3053df35a632ee1c1e929c22b0ba0cbfc5e6a5954951a4470b8908740772e

Download Submit
C:\Users\Admin\AppData\Local\Temp\8DjJ6b1hcpzor8H.exe

Filesize
71KB

MD5
905e919d503f95fab4d076819ec79dc4

SHA1
8e9bcb179bb63f31908a3bfc9ffaffd06888dc6d

SHA256
5283dded2aed99de453882ae7ac4fda77bae6dda6597fef97225d66990c6cb46

SHA512
186e990d1fb08bbabd70196122fa21ee9de700132d9cec7512fb9a216850a0b2802d6a19ef9425197d636ecf6426db9b2bae972d4faabde09406c001a9293e0d

Download Submit
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

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Downloads