a9f7c4d2716c64b45190b04b9a36861a6122b136f973079f4d4a6d72f5761b18

Analysis

max time kernel
129s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
02/06/2024, 15:25

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General

Target
2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_bkransomware.exe
Size 74KB
Sample240602-stl3asfe7w
SHA256 a9f7c4d2716c64b45190b04b9a36861a6122b136f973079f4d4a6d72f5761b18
MD5 acedaea97b6c0879f4dbdd9d2ed0bd75
SHA1 12023674604e7803918fefa2cd0f3f77d01da876
SHA512 f7aff79ed71e785a300f6a2045a221b4f1cc4db13b636e8fe21f4dbdb8963f312e0935013f6b0199467c4d7d065917cf60a71a84ea977080e3c29bf0c7a47cb0
SSDEEP 1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTSZEar:ZhpAyazIlyazTE
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
3688	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"	2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_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	2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	968	2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_bkransomware.exe
Token: SeDebugPrivilege	3688	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 968 wrote to memory of 3688	968	2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_bkransomware.exe	83
PID 968 wrote to memory of 3688	968	2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_bkransomware.exe	83
PID 968 wrote to memory of 3688	968	2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_bkransomware.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-02_acedaea97b6c0879f4dbdd9d2ed0bd75_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:968
- 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:3688

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 395KB
SHA256 9fb6144c404888a795685f68b3f8ceff1feccec67516e711e3590e9719c3cfd9
MD5 61dfdc4e999808f8e58a5b68c20f5c63
SHA1 5dab229d7878e2dfa43073ce61cd6c73d8250877
SHA512 e9a3b2525bc6a74198189d7d0ddbdb3e9dcb500623794f8af49b72bfc127b47fac8b1a89997e31e1ead3f96b30162983d3d9ccc54a1eac0ebe74fb020476fc08
SSDEEP 6144:hZMazf1ZNYfX2jkrcLTVhnVZejAPWSbDOL0EFB2eBuF+762rsGWtzkIdgYkY:hS0fBY/M6cLTVhnftvWIWYeNYGWt5diY
MD5 SHA1 SHA512 SSDEEP

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HDrFUcAJLyDOJpu.exe

Path C:\Users\Admin\AppData\Local\Temp\HDrFUcAJLyDOJpu.exe
Size 74KB
SHA256 ae1521458e125778a35f8ffd4d14a76146398cbc69ace2213e5b91e3fd600028
MD5 a8a35f0759bb26a32b8ebeaf36b7f36b
SHA1 0b3be30a844a009c8f4ee46470b92cc84c72452e
SHA512 a871170e77864119ac44681a6d3c6d31d1be55b0d99d1f5e64b0d9d4739d723744033a7d96ee5147e3d50ed1e027337fd42032d4d4df12b2ec431f5c0d767672
SSDEEP 1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTh58k:ZhpAyazIlyazTf
MD5 SHA1 SHA512 SSDEEP

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CTS.exe

Path C:\Windows\CTS.exe
Size 71KB
SHA256 075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
MD5 66df4ffab62e674af2e75b163563fc0b
SHA1 dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA512 1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25
SSDEEP 1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazT:ZhpAyazIlyazT
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