4b37436873af3f5a6d3805a3541e5a7eb14f8a5d7278cc20419ea95cc67dd2ce

Analysis

max time kernel
150s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240704-en
resource tags

arch:x64arch:x86image:win10v2004-20240704-enlocale:en-usos:windows10-2004-x64system
submitted
06/07/2024, 08:22

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General

Target

2024-07-06_02821cf310682308c6f102286546e4bc_bkransomware.exe
Size

71KB
MD5

02821cf310682308c6f102286546e4bc
SHA1

d8448f642b44063016bccab800a9fe225947a5f4
SHA256

4b37436873af3f5a6d3805a3541e5a7eb14f8a5d7278cc20419ea95cc67dd2ce
SHA512

460080e5faf7e94709f2dfdca476f0587af76cc4322e3866679ca76fcd9328a5bd0590441b223556d1c9bd011afd8a14864004ec74ef392fa1e29e6076c2f4e4
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTD:ZRpAyazIliazTD

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4616	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"	2024-07-06_02821cf310682308c6f102286546e4bc_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	2024-07-06_02821cf310682308c6f102286546e4bc_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2540	2024-07-06_02821cf310682308c6f102286546e4bc_bkransomware.exe
Token: SeDebugPrivilege	4616	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2540 wrote to memory of 4616	2540	2024-07-06_02821cf310682308c6f102286546e4bc_bkransomware.exe	82
PID 2540 wrote to memory of 4616	2540	2024-07-06_02821cf310682308c6f102286546e4bc_bkransomware.exe	82
PID 2540 wrote to memory of 4616	2540	2024-07-06_02821cf310682308c6f102286546e4bc_bkransomware.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-07-06_02821cf310682308c6f102286546e4bc_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-07-06_02821cf310682308c6f102286546e4bc_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2540
- 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:4616

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
5a2ffab14fb0e65674b7cf2217d6037d

SHA1
5c335a6073db520d63c24150f0f16337b088e339

SHA256
a7d3fadcf09c098207d018fda573861ae2878597245c25fc94275b19c1d063ca

SHA512
4ff96e03d909dd279ee6321e27846aaf1bb7e65bfa337f400e25f1db2df8c9c4161fd16d6219816ef971212a70bdaa00e9f255b58f97de1abc1deec99952339d

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C:\Users\Admin\AppData\Local\Temp\ayV1N9oN0m3b56N.exe

Filesize
71KB

MD5
2faea968fcf54e19c11355c8513ab2f8

SHA1
ba640f0555f86ffcd73bc23501355a005653f207

SHA256
c466fd7de37d75b02b4e7893bf82c7856c309509137bfe20199bcbf65f4df504

SHA512
632ec64ec0bfaefc08bd9345b18e51e37601fe0144dd89403f5ebb349ff74dcc1c85019326b0569a27adb72e2253cb1f74532a9290d73ce3b643c0150b3da6f6

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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

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Downloads