f56c642ba5b5a9efcbc76f475e7f8720a920970f01c54e9db1e7bd6c21130b69

Analysis

max time kernel
55s
max time network
53s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
27/04/2024, 18:43

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
2024-04-27_d1052900e126a03f128bde5d0ac77a98_bkransomware.exe
Size 288KB
Sample240427-xc49rsec34
SHA256 f56c642ba5b5a9efcbc76f475e7f8720a920970f01c54e9db1e7bd6c21130b69
MD5 d1052900e126a03f128bde5d0ac77a98
SHA1 5f6edfe1e2e80f96b1816ba6d6df8140c06e9c7b
SHA512 a124c5ff6cace0a471d39a92a3ccdf54723e7a39354513066802fb2da35579d90aef6ffdfb2f43c004d10f9b0d92709ebabf4955b963932450ea61c97549b217
SSDEEP 6144:hZMazKoCgEeUOMeJ9gmr9Dz3Z1CpSDs/ekn5cdxAumUZ:hS0KoCfX2JTzvCks/ekEbZZ
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
1964	osWqwVEJj5pPEcV.exe
2728	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"	2024-04-27_d1052900e126a03f128bde5d0ac77a98_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	2024-04-27_d1052900e126a03f128bde5d0ac77a98_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2440	2024-04-27_d1052900e126a03f128bde5d0ac77a98_bkransomware.exe
Token: SeDebugPrivilege	2728	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2440 wrote to memory of 1964	2440	2024-04-27_d1052900e126a03f128bde5d0ac77a98_bkransomware.exe	83
PID 2440 wrote to memory of 1964	2440	2024-04-27_d1052900e126a03f128bde5d0ac77a98_bkransomware.exe	83
PID 2440 wrote to memory of 2728	2440	2024-04-27_d1052900e126a03f128bde5d0ac77a98_bkransomware.exe	84
PID 2440 wrote to memory of 2728	2440	2024-04-27_d1052900e126a03f128bde5d0ac77a98_bkransomware.exe	84
PID 2440 wrote to memory of 2728	2440	2024-04-27_d1052900e126a03f128bde5d0ac77a98_bkransomware.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-04-27_d1052900e126a03f128bde5d0ac77a98_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-27_d1052900e126a03f128bde5d0ac77a98_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2440
- C:\Users\Admin\AppData\Local\Temp\osWqwVEJj5pPEcV.exe
  C:\Users\Admin\AppData\Local\Temp\osWqwVEJj5pPEcV.exe
  2⤵
  - Executes dropped EXE
  PID:1964
- 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:2728

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

Loading Replay Monitor...

Downloads

excel.exe_Rules.xml

Path C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Size 392KB
SHA256 37ba42992b3959b3ccd932ba78bc43c64c33ec6a8b3000a222dbbb4ba9ca9538
MD5 8f211afd3a42faaffc32da33d27680d8
SHA1 d7e0f0ca7185bb46f1f4fb6ae0c0a3a4780e524e
SHA512 92bb87d893b1b222ccef4201467fc85772a08e2b7b2cf4da6ddf3ac2e5885b3b0b5e1eb871f4afcd5cce467142bc1ccb9f1dcf425252cc4be8dcf303e1779b22
SSDEEP 12288:hS0DU1r52Mldd+hykWNfiQhIuYqf00BnYbU:DDSRAYkWFQuYUR
MD5 SHA1 SHA512 SSDEEP

Submit Download

osWqwVEJj5pPEcV.exe

Path C:\Users\Admin\AppData\Local\Temp\osWqwVEJj5pPEcV.exe
Size 217KB
SHA256 b2e32b3fa44b3a9a8fdfa906627355f6f48b4821929f9bce5ded2d07894361d4
MD5 f8a38fd27da720881c0af1ac99b8c1ad
SHA1 2ed31938119e2ebdeb0f5539c985e9965aef72d7
SHA512 aafa05bc5bd68687b998fe4d9a619caecc65d14f317af7a05ac0ecab7e231891e8719029245dc84eddce20bdd4c0cc6f4ffafdf8200227746b28cc6628564495
SSDEEP 3072:3IQqzmLHdlu5XsYTd85OLxGDTjyG0QXNSWtZdag8yTBfRUqqIgwz0MT:3IQqeHdA51d18T+G0QXMW30gPTB5/uwT
MD5 SHA1 SHA512 SSDEEP

Submit Download

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

Submit Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads