a0918bf70d950a457d683f3dd3eb9b1c52f5e5bf6ea2e7a08fbc017cc6e0a70e

Analysis

max time kernel
136s
max time network
124s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
30/04/2024, 00:29

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General

Target

2024-04-30_39d8d950440b31a19f4c0403d9d58437_bkransomware.exe
Size

71KB
MD5

39d8d950440b31a19f4c0403d9d58437
SHA1

664570a69039767f3daba86a780ad12dea0008dc
SHA256

a0918bf70d950a457d683f3dd3eb9b1c52f5e5bf6ea2e7a08fbc017cc6e0a70e
SHA512

e06255e867708c98708440850105554c97fcd3cd717eb6e14ed08d5e79cc37d4596e616d14f2e2e06a18aa089f9ba3efeea188a0d45f35e31ce5972e4bd9c915
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTR:ZhpAyazIlyazTR

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4036	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"	2024-04-30_39d8d950440b31a19f4c0403d9d58437_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	2024-04-30_39d8d950440b31a19f4c0403d9d58437_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3592	2024-04-30_39d8d950440b31a19f4c0403d9d58437_bkransomware.exe
Token: SeDebugPrivilege	4036	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3592 wrote to memory of 4036	3592	2024-04-30_39d8d950440b31a19f4c0403d9d58437_bkransomware.exe	84
PID 3592 wrote to memory of 4036	3592	2024-04-30_39d8d950440b31a19f4c0403d9d58437_bkransomware.exe	84
PID 3592 wrote to memory of 4036	3592	2024-04-30_39d8d950440b31a19f4c0403d9d58437_bkransomware.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-04-30_39d8d950440b31a19f4c0403d9d58437_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-30_39d8d950440b31a19f4c0403d9d58437_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3592
- 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:4036

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
408a60427e5ebe3f473594663e2b3c98

SHA1
af060174c9415a35bce92da6ef86dc488ee99b49

SHA256
ac2c2c3f3680d9da08946619312b6dfc15f79da34301c3ae31bf46556bb44288

SHA512
60ed441a4ae3097ea9c5492c3fddf4503ac61df428e5bf49464142d7083e17f650fbdf9616f95ae069574978de26ffba56d3cd99e507538c0fca447301dfe73a

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C:\Users\Admin\AppData\Local\Temp\3c9DPEm1iGBCGRu.exe

Filesize
71KB

MD5
fcf0d80fcb0bfbf0a189605fb73e21d9

SHA1
5a4c730e18bd7144d09a7b05738bdf1b23bc6388

SHA256
ab8724cfb5d1eeb34b7aeee3f2ea558da15a6bd5cc34a19e8a2172932843d0a7

SHA512
9580687a70f568383a3ed94d766353cf807254f2fdb61f331c458b7d84ba607f3a98c0f280891aec26ce16dc1451c8d7c395687b73b989bafb32eb289dd57be0

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C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads