13f0706f4b3aed622db919d2ebd33c6c57aa38983fcac5b5f8102d06ba797bd0

Analysis

max time kernel
142s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
02/06/2024, 20:12

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General

Target

2024-06-02_961b892b407b350c9abde16e1642f5dc_bkransomware.exe
Size

71KB
MD5

961b892b407b350c9abde16e1642f5dc
SHA1

469ac7668adc75958da74f9e02b4bd7f140316d8
SHA256

13f0706f4b3aed622db919d2ebd33c6c57aa38983fcac5b5f8102d06ba797bd0
SHA512

50270ff67201ead9ca7e0733d1bac1187e497cbf6bbced41e8b92cb77cc2824e5f1ffb8fd31bfffe3795b8d9570f1a9a1236983f3666f3376d025b1a95e376a6
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTd:ZhpAyazIlyazTd

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
3048	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_961b892b407b350c9abde16e1642f5dc_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_961b892b407b350c9abde16e1642f5dc_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4664	2024-06-02_961b892b407b350c9abde16e1642f5dc_bkransomware.exe
Token: SeDebugPrivilege	3048	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4664 wrote to memory of 3048	4664	2024-06-02_961b892b407b350c9abde16e1642f5dc_bkransomware.exe	91
PID 4664 wrote to memory of 3048	4664	2024-06-02_961b892b407b350c9abde16e1642f5dc_bkransomware.exe	91
PID 4664 wrote to memory of 3048	4664	2024-06-02_961b892b407b350c9abde16e1642f5dc_bkransomware.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-06-02_961b892b407b350c9abde16e1642f5dc_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-02_961b892b407b350c9abde16e1642f5dc_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4664
- 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:3048

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4472 --field-trial-handle=2656,i,16940681401824032220,151921362336696246,262144 --variations-seed-version /prefetch:8
1⤵
PID:5044

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
789KB

MD5
37b9c768e6eb4bf2ac00d3cc83531023

SHA1
97f0b8ae04bb3c2f37d7475baa1a3feca988a348

SHA256
5507afffafc090410230d4deb74389cdfab6454aabe23ebb9822e58c57fcb591

SHA512
ca6fc175364527dc498ca9fd63eab7e46a98aea730d671efcb77e7b33537e0c60f6be11fd002541c8410c89675c10943ca27836f8cc5de9dc95d05f936caa29b

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

Filesize
71KB

MD5
cd0713b3b74a764154477ec81ca47c5e

SHA1
175fa32c71cccce6faa5955edb28fa98d1844017

SHA256
2a8d3a76585edd74ff27ed86998906b7c1fc7abd742cf247b8b4abf580e567de

SHA512
0c9761ae1729357c0a4221dd4765c3f4ddca914694f7a1761275be2359d85da4e6b088bd561e1164b3db8ec0ce9b25cd5cc1326406b22ef6023be0e282cba62f

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads