8aa2a3c75d0db6bb181577a239bd0d3c712b09c4011d8c8b3a72c6e1def2aace

Analysis

max time kernel
142s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
29/04/2024, 23:41

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General

Target

2024-04-29_99be3813f23657e2efcad446a2da0d4b_bkransomware.exe
Size

71KB
MD5

99be3813f23657e2efcad446a2da0d4b
SHA1

03b13a7d4d00c9d16bce59a14c762e167b2fc3d9
SHA256

8aa2a3c75d0db6bb181577a239bd0d3c712b09c4011d8c8b3a72c6e1def2aace
SHA512

ef6cbd3e2c1ed11ab57fce282bc382d8c8d2641273f758e89ab70f8f83abb102b9c72463297ad39963aea4fb38700b285d921776234ab27d2df351b334794783
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTD:ZRpAyazIliazTD

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
3292	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"	2024-04-29_99be3813f23657e2efcad446a2da0d4b_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	2024-04-29_99be3813f23657e2efcad446a2da0d4b_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1800	2024-04-29_99be3813f23657e2efcad446a2da0d4b_bkransomware.exe
Token: SeDebugPrivilege	3292	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1800 wrote to memory of 3292	1800	2024-04-29_99be3813f23657e2efcad446a2da0d4b_bkransomware.exe	90
PID 1800 wrote to memory of 3292	1800	2024-04-29_99be3813f23657e2efcad446a2da0d4b_bkransomware.exe	90
PID 1800 wrote to memory of 3292	1800	2024-04-29_99be3813f23657e2efcad446a2da0d4b_bkransomware.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-04-29_99be3813f23657e2efcad446a2da0d4b_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-29_99be3813f23657e2efcad446a2da0d4b_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1800
- 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:3292

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=4484 --field-trial-handle=1928,i,13242902252791919845,10377620236057253993,262144 --variations-seed-version /prefetch:8
1⤵
PID:3556

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
b781ead11efb1d91ba96191ecee64174

SHA1
fdcad9888ece4b431d64eeaed974ee3aecc0ee57

SHA256
cbc0ddde61a5285d93dd12d212066a54e07c8217f6d2da2811ed615c749694fb

SHA512
2205ec2e86d0123e48eca52294466d15f45c4778125f7c98d524be5887a24b175428b429419b0567bbd99b412295e64a0e6932355d0539e928b6f7d883cb9d63

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C:\Users\Admin\AppData\Local\Temp\zspjrjBb1eqOnBm.exe

Filesize
71KB

MD5
4cb307dbf33aae8f7a67b9d6e05299eb

SHA1
ae4323e0387750fdb069030a4ce8af33e1a6f1cb

SHA256
a9963236212fef216f322cb8921455c40b28b76dfddd485a53e31d3703dff961

SHA512
2f1be7f800f59be8ae6177b576e81b45cd9a55e8d7ef89b736d4ec25e7573c53b64d4025668febe18952136e7124f6cd45ac486dc1004f3e5adf569e6278b0b2

Download Submit
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

Replay Monitor

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Downloads