5167d216151b36e6085a5db10ab5396152be0e4e54fe7f5673fdc24666e3d347

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
01/06/2024, 15:38

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General

Target
2024-06-01_74f4da336c2a3d079d593059e81d3fab_bkransomware.exe
Size 71KB
Sample240601-s25jlsgd49
SHA256 5167d216151b36e6085a5db10ab5396152be0e4e54fe7f5673fdc24666e3d347
MD5 74f4da336c2a3d079d593059e81d3fab
SHA1 b51245c34fdb5015b573acf7fca00c3e69a0a8a8
SHA512 28e36599c5007b0a1137cc3be38fb589ffeb266d96f2c5f9be8f1ca74056aa4988cdff58caeb19caaf81cf9c14dc4d1ab009ca44b3bd4407bb464249df0a24ac
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTr:ZRpAyazIliazTr
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
468	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"	2024-06-01_74f4da336c2a3d079d593059e81d3fab_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	2024-06-01_74f4da336c2a3d079d593059e81d3fab_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3708	2024-06-01_74f4da336c2a3d079d593059e81d3fab_bkransomware.exe
Token: SeDebugPrivilege	468	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3708 wrote to memory of 468	3708	2024-06-01_74f4da336c2a3d079d593059e81d3fab_bkransomware.exe	93
PID 3708 wrote to memory of 468	3708	2024-06-01_74f4da336c2a3d079d593059e81d3fab_bkransomware.exe	93
PID 3708 wrote to memory of 468	3708	2024-06-01_74f4da336c2a3d079d593059e81d3fab_bkransomware.exe	93

C:\Users\Admin\AppData\Local\Temp\2024-06-01_74f4da336c2a3d079d593059e81d3fab_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-01_74f4da336c2a3d079d593059e81d3fab_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3708
- 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:468

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=4080 --field-trial-handle=2744,i,16362475727591565961,3676688664819797550,262144 --variations-seed-version /prefetch:8
1⤵
PID:4656

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

excel.exe_Rules.xml

Path C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Size 789KB
SHA256 f3f5555a10451880d8224d6ef58c8ba8fa6043f92d4f8184fe399228fc9b0bb0
MD5 1b1343be780edfa9215df88983783ae5
SHA1 8d66b745f98e51e7b2b4597e738c85c04c8a3976
SHA512 9e5de0cc13064e9aa5dd5317d07988b7164c9bdeb1af3712144f5cbef9f4a491dfa4ae995d01ec55507257f4964cc689bd3d492fd5e6c53a8efb57887c3a3141
SSDEEP 24576:DFxst3H9D4I1BNjBPt2ZtDyWJ6Ne6OxWS2kWxi:DFxOX90I1BTPQjDyS6U5xWSsxi
MD5 SHA1 SHA512 SSDEEP

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hnVyHb7uUr8VMlY.exe

Path C:\Users\Admin\AppData\Local\Temp\hnVyHb7uUr8VMlY.exe
Size 71KB
SHA256 6771d01e01d4cf467ed32ea220276ad3191a6638902994c8ba242c296d9c89f5
MD5 760804ccc551e3367c5917658d674b49
SHA1 a779a19b9236ef615935648f66c8312ba4a42d80
SHA512 a3e6a8f04a42fbdc152b4e7da4b9cd15b24a822da321438a1a986dda360931e9460859b7e13b1e84deb682467bc4f804029a1c77411dd9b3cd0cb0595955f134
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTJ:ZRpAyazIliazTJ
MD5 SHA1 SHA512 SSDEEP

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CTS.exe

Path C:\Windows\CTS.exe
Size 71KB
SHA256 b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
MD5 f9d4ab0a726adc9b5e4b7d7b724912f1
SHA1 3d42ca2098475924f70ee4a831c4f003b4682328
SHA512 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT:ZRpAyazIliazT
MD5 SHA1 SHA512 SSDEEP

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads