4aa398030fa123d5ee21788cc951f19864b2aff92e22d87ef77ab14d006b85c3

Analysis

max time kernel
138s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
03-05-2024 11:50

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General

Target

2024-05-03_2356db4b7d446403982ced9cafb3eee2_bkransomware.exe
Size

71KB
MD5

2356db4b7d446403982ced9cafb3eee2
SHA1

b9cced7c713acc1c7313e02402fb68ffb9a9e361
SHA256

4aa398030fa123d5ee21788cc951f19864b2aff92e22d87ef77ab14d006b85c3
SHA512

134a0b6c231b4458ccbee3c7fea2044d67273846cf5373844676c68b76c76c7946126d1ed7f69fde149338ccfea46ed859a3666a261811762732f8d0e5fb3276
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazT0:ZhpAyazIlyazT0

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
736	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"	2024-05-03_2356db4b7d446403982ced9cafb3eee2_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	2024-05-03_2356db4b7d446403982ced9cafb3eee2_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2380	2024-05-03_2356db4b7d446403982ced9cafb3eee2_bkransomware.exe
Token: SeDebugPrivilege	736	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2380 wrote to memory of 736	2380	2024-05-03_2356db4b7d446403982ced9cafb3eee2_bkransomware.exe	91
PID 2380 wrote to memory of 736	2380	2024-05-03_2356db4b7d446403982ced9cafb3eee2_bkransomware.exe	91
PID 2380 wrote to memory of 736	2380	2024-05-03_2356db4b7d446403982ced9cafb3eee2_bkransomware.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-05-03_2356db4b7d446403982ced9cafb3eee2_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-03_2356db4b7d446403982ced9cafb3eee2_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2380
- 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:736

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=3920 --field-trial-handle=3084,i,4016110471176367543,14287608422419064331,262144 --variations-seed-version /prefetch:8
1⤵
PID:2184

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

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml

Filesize
789KB

MD5
949637b7d5a5f922e52314c1450718d7

SHA1
a76581cb245f376c88f14b140d36782682af0c1a

SHA256
43a7bfca9151e223414eab14df458fdb8d30639a76ed9b3be46cfce8636e3c92

SHA512
0b152038d5e8e650649b04b3eb67e40ba5a68755d879ff24958ae685912407417c3203857539ff499e6db5214bf8f571723325cafc16c92a18e364d9eb039364

Download Submit
C:\Users\Admin\AppData\Local\Temp\BYCADUh3hTepWyz.exe

Filesize
71KB

MD5
1ac49b0a7dd0826f79ae6f84e572fd9d

SHA1
5af9a8bf4910c9629926f615aac9e51d434b1659

SHA256
cb43c9b45bd9177a852fb946321df4bf4c172a621f485d74a9b46098072d6950

SHA512
28b807b9936fc73c407f1a38c1b44ad55cd0ef0e65217858e122f15d49c1afdc9ae073f7c5c67cdafa6efe892ddd118a2ed54746af340f143f680cf259c95e4c

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