6ced593a80abc9abf9973026b00dabc1b43cc594050ae5e32d2f17b4004fe193

Analysis

max time kernel
142s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 03:38

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General

Target

2024-05-23_683996928fe6e441c09d4e4798ada32d_bkransomware.exe
Size

71KB
MD5

683996928fe6e441c09d4e4798ada32d
SHA1

9cbbb7be774618b6c64196a4e604835de204eaf7
SHA256

6ced593a80abc9abf9973026b00dabc1b43cc594050ae5e32d2f17b4004fe193
SHA512

9b2f6c6bc094f29177f391ee8e340f156eaa2cdd78ec8d221a7fe1bd79228a838e6786ede51a9284bee3bfe5ae733ae6bf5e4fa15497572ebce1806d9a8065d9
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTk:ZRpAyazIliazTk

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

3408 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
3408	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-05-23_683996928fe6e441c09d4e4798ada32d_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-23_683996928fe6e441c09d4e4798ada32d_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:

2024-05-23_683996928fe6e441c09d4e4798ada32d_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-23_683996928fe6e441c09d4e4798ada32d_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-23_683996928fe6e441c09d4e4798ada32d_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 792 2024-05-23_683996928fe6e441c09d4e4798ada32d_bkransomware.exe
Token: SeDebugPrivilege 3408 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-23_683996928fe6e441c09d4e4798ada32d_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	792	2024-05-23_683996928fe6e441c09d4e4798ada32d_bkransomware.exe
Token: SeDebugPrivilege	3408	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-23_683996928fe6e441c09d4e4798ada32d_bkransomware.exe

description	pid	process	target process
PID 792 wrote to memory of 3408	792	2024-05-23_683996928fe6e441c09d4e4798ada32d_bkransomware.exe	CTS.exe
PID 792 wrote to memory of 3408	792	2024-05-23_683996928fe6e441c09d4e4798ada32d_bkransomware.exe	CTS.exe
PID 792 wrote to memory of 3408	792	2024-05-23_683996928fe6e441c09d4e4798ada32d_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_683996928fe6e441c09d4e4798ada32d_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_683996928fe6e441c09d4e4798ada32d_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:792

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:3408

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=4088 --field-trial-handle=3088,i,14310325015283915034,7660943942870463106,262144 --variations-seed-version /prefetch:8
1⤵
PID:404

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
58587512328ac21de0275676a19313d8

SHA1
63802804b329840875b7362a6305b4004b2b2404

SHA256
fe6b3d65a1c2a266af356826ff1a9b82896205b7667849b88c303fbfb05f79c4

SHA512
001cd72b7d42a3454cf1c0f4b7b962ddfa56b3554d9798dd7a779e80664102b189a144a9792716be65b87ec375412128884a52d6d80a0e183bdcb28131760102

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C:\Users\Admin\AppData\Local\Temp\IOikMuBStab8LvT.exe
Filesize
71KB

MD5
368abb12dbc42b7089d6f4d2819a43ca

SHA1
8633aafaec859aeba9abed7bd58bcab0812650a1

SHA256
b1be7fa355bdce588e24d6b7c25bbac4465a29afe75416428aac5a8c661a73ac

SHA512
4380841514d5bbc5409cf2a468def8f758eedec6969e5ca81a0063d28b11f0802b6685e1f62ea7d028a87547b13a3e0455cac78fa70723f627105955bdadfecf

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

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit