87d267bf6105e887e5fc1844500827ee4eb696a47ac276187b32c15082e1aeb3

Analysis

max time kernel
133s
max time network
133s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
26/05/2024, 06:42

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General

Target

2024-05-26_a3e8b6ac427ae3c9c9af689fffde468b_bkransomware.exe
Size

71KB
MD5

a3e8b6ac427ae3c9c9af689fffde468b
SHA1

f0e16def91c35f320ca57877814b056128a98fe9
SHA256

87d267bf6105e887e5fc1844500827ee4eb696a47ac276187b32c15082e1aeb3
SHA512

9fd2c4293022c93654d0987dba1f20d2c6c82eb7de1f008cd7d66cb121123edb01eb3fd742e2b009338aa92d3a7d200c8b47795850fb0dc9938c518fe24797c0
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTl:ZRpAyazIliazTl

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4376	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"	2024-05-26_a3e8b6ac427ae3c9c9af689fffde468b_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	2024-05-26_a3e8b6ac427ae3c9c9af689fffde468b_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4020	2024-05-26_a3e8b6ac427ae3c9c9af689fffde468b_bkransomware.exe
Token: SeDebugPrivilege	4376	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4020 wrote to memory of 4376	4020	2024-05-26_a3e8b6ac427ae3c9c9af689fffde468b_bkransomware.exe	91
PID 4020 wrote to memory of 4376	4020	2024-05-26_a3e8b6ac427ae3c9c9af689fffde468b_bkransomware.exe	91
PID 4020 wrote to memory of 4376	4020	2024-05-26_a3e8b6ac427ae3c9c9af689fffde468b_bkransomware.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-05-26_a3e8b6ac427ae3c9c9af689fffde468b_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-26_a3e8b6ac427ae3c9c9af689fffde468b_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4020
- 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:4376

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 --field-trial-handle=1036,i,13640054265074968359,8146127767143474550,262144 --variations-seed-version --mojo-platform-channel-handle=3816 /prefetch:8
1⤵
PID:2784

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
393KB

MD5
411127852f759a00beec3a1b800c9d01

SHA1
d025058a46a30e81bd87bf61f962cdfbbfa036ba

SHA256
0c3e5d778573a0fb18c55f7aa312e805844c09eb2377a65d98a4093b9464e04d

SHA512
d9f52a98bc79d53ca66f8f9383c6f0f53fcbe1c11ecf9911929b928204af030983a9f56852d60f46ce27a6fa8db02552356c01259c64605eb047345d13632453

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

Filesize
71KB

MD5
121489afd8bd30b6e206ac85d57480ac

SHA1
c1a03af731efb044607accb47309d97a90b6fda3

SHA256
69d2c452c044b1b7eda909e210825c701e8f12f9fe0cb78b93d50f8f0182bf0c

SHA512
9adb688f4983ae8798b879c6c3e0765d6bf1c8ac7999073175d99f449289be793a8197dbecef9f7be80506d6cefd7eceb6ccd52c34cc37fd81c011264132a93e

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads