6e9c5b200da44c4c789d1ae2cae43b9a1ff1da6559f1fd94ebd955450c6f2645

Analysis

max time kernel
143s
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
28-04-2024 10:25

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General

Target

2024-04-28_46f482774fc9c8b987b0de2e2f0b0bc5_bkransomware.exe
Size

73KB
MD5

46f482774fc9c8b987b0de2e2f0b0bc5
SHA1

ef0af2606a99fdb810430c61195d0a2f4e174a7e
SHA256

6e9c5b200da44c4c789d1ae2cae43b9a1ff1da6559f1fd94ebd955450c6f2645
SHA512

9d57396987f7a1e75aafb0ad554772aee5d98a9a11dd08a59775bc334fb339e7f7a4d0c95a04fa55908f0b606da3a18acb4c481746887c9e8deb76d1ded4484b
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTkba:ZhpAyazIlyazTaa

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

3980 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

pid	process
3980	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-04-28_46f482774fc9c8b987b0de2e2f0b0bc5_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-04-28_46f482774fc9c8b987b0de2e2f0b0bc5_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

Processes:

2024-04-28_46f482774fc9c8b987b0de2e2f0b0bc5_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_46f482774fc9c8b987b0de2e2f0b0bc5_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_46f482774fc9c8b987b0de2e2f0b0bc5_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 824 2024-04-28_46f482774fc9c8b987b0de2e2f0b0bc5_bkransomware.exe
Token: SeDebugPrivilege 3980 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_46f482774fc9c8b987b0de2e2f0b0bc5_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	824	2024-04-28_46f482774fc9c8b987b0de2e2f0b0bc5_bkransomware.exe
Token: SeDebugPrivilege	3980	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_46f482774fc9c8b987b0de2e2f0b0bc5_bkransomware.exe

description	pid	process	target process
PID 824 wrote to memory of 3980	824	2024-04-28_46f482774fc9c8b987b0de2e2f0b0bc5_bkransomware.exe	CTS.exe
PID 824 wrote to memory of 3980	824	2024-04-28_46f482774fc9c8b987b0de2e2f0b0bc5_bkransomware.exe	CTS.exe
PID 824 wrote to memory of 3980	824	2024-04-28_46f482774fc9c8b987b0de2e2f0b0bc5_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_46f482774fc9c8b987b0de2e2f0b0bc5_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_46f482774fc9c8b987b0de2e2f0b0bc5_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:824

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:3980

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=4104 --field-trial-handle=2280,i,11703952675008463361,17436195144517971517,262144 --variations-seed-version /prefetch:8
1⤵
PID:3984

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Filesize
789KB

MD5
52a58afb2e139622dcc8ec01b6d724e3

SHA1
54d0eba811f00b2d8bb9aa55146811cf90766ce5

SHA256
c06e6bb51959769a45f896a164aa289f0cdc186e6380d40d3ef0593f2508dab7

SHA512
54b8c5390ee1f310979b6f974898950e23a686aef31fb299fc4b3dcb663ea03bc02a53463836647fb34aa8236fe9d2a9b362162e67f88b27c8ea46e13c2a3733

Download Submit
C:\Users\Admin\AppData\Local\Temp\lcKHkakdcW7esh7.exe
Filesize
73KB

MD5
1a692bca9c4fe0396e996887420a1f3d

SHA1
e9748855529e6072905730beec0213fa9e19b8ac

SHA256
046479d654945c33b3b56d83e750b53895f00a229bcecc2096dead40327066cb

SHA512
06e29ca182777385799ef9e9f307ce5e7d2c59595bc57d3090228eb829691580c594c988827086f128bea3ed851dc718dc200cde20974bb8032f49c4cb03a115

Download Submit
C:\Windows\CTS.exe
Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit