be8db26f3ac26a040e2d5220cc6b05c1d47092c93dff897a66876409aa428be4

Analysis

max time kernel
143s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
27/04/2024, 18:09

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General

Target

2024-04-27_48692719e759974d2b95459f80a96a31_bkransomware.exe
Size

71KB
MD5

48692719e759974d2b95459f80a96a31
SHA1

026f285005c0c1c19907b2398f80514bf8d7e206
SHA256

be8db26f3ac26a040e2d5220cc6b05c1d47092c93dff897a66876409aa428be4
SHA512

17b62f8f7c62b9277f5ffac4260eaf66f92dde15b1290ed62ff930b2b65713f310f250fe06664b816db1f1496c48e96bc77875a5dab7e939e5897de37db83472
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTN:ZRpAyazIliazTN

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1708	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_48692719e759974d2b95459f80a96a31_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_48692719e759974d2b95459f80a96a31_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	864	2024-04-27_48692719e759974d2b95459f80a96a31_bkransomware.exe
Token: SeDebugPrivilege	1708	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 864 wrote to memory of 1708	864	2024-04-27_48692719e759974d2b95459f80a96a31_bkransomware.exe	89
PID 864 wrote to memory of 1708	864	2024-04-27_48692719e759974d2b95459f80a96a31_bkransomware.exe	89
PID 864 wrote to memory of 1708	864	2024-04-27_48692719e759974d2b95459f80a96a31_bkransomware.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-04-27_48692719e759974d2b95459f80a96a31_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-27_48692719e759974d2b95459f80a96a31_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:864
- 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:1708

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=4172 --field-trial-handle=2264,i,15001568551143786084,90255922961447677,262144 --variations-seed-version /prefetch:8
1⤵
PID:3216

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
175068a3c6b1ebe77d657001d3080782

SHA1
fcd9682469b87a553cdbef72f44b6d833a4edd53

SHA256
efbd3055ec71745aaf3cec23b649e2feb8a7406ba55abc9da0b7b786b1b128e5

SHA512
1a8b49c2b400a98f26e9d02a1970b863b8b1a6000062c0057622c8c47fea5affe960e9e256dd5f421ad5c106ce5174148dd4a1244284bf17db1da3d1e779c93d

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C:\Users\Admin\AppData\Local\Temp\P3H7MTAoFdwQzMk.exe

Filesize
71KB

MD5
2ed536694453b56d05cd3cc4a2b9789b

SHA1
cce8068cf5a0a80ec3f6051e1e733695e9a5a079

SHA256
b5bb22a04b620a0fd93fee84ac717e5dcf755cb1d6791093f021310a292e76b7

SHA512
791e14d953ec5ef495a641a491cbc9f4dfda5213e4006f8e8a14b9b2ce86d480184615a7a2c01ac4c5426e7784a32f2d2d60b0ec33ca6a96dd5bd9d5b850e03b

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C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads