4bda4a25c188db8d7b74c99106781b969488fbc411c0353b29a9cdd01e862f43

Analysis

max time kernel
143s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
25/06/2024, 14:49

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General

Target

2024-06-25_e341d0b7ed5eb9267b8efc879c13ee10_bkransomware.exe
Size

71KB
MD5

e341d0b7ed5eb9267b8efc879c13ee10
SHA1

92e02441bc5acfd76567a0cdb5b2e2aab8ba5907
SHA256

4bda4a25c188db8d7b74c99106781b969488fbc411c0353b29a9cdd01e862f43
SHA512

f86ddd6e8d274b985aa7cb551fd3ea5c3a1aa0cf1bd43f68b6b07d0223c56b11ded93a1c131ddbc8b4a3d75217fc5458b0cb337f05bf46479536024000989964
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTv:ZhpAyazIlyazTv

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4480	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"	2024-06-25_e341d0b7ed5eb9267b8efc879c13ee10_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	2024-06-25_e341d0b7ed5eb9267b8efc879c13ee10_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	628	2024-06-25_e341d0b7ed5eb9267b8efc879c13ee10_bkransomware.exe
Token: SeDebugPrivilege	4480	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 628 wrote to memory of 4480	628	2024-06-25_e341d0b7ed5eb9267b8efc879c13ee10_bkransomware.exe	91
PID 628 wrote to memory of 4480	628	2024-06-25_e341d0b7ed5eb9267b8efc879c13ee10_bkransomware.exe	91
PID 628 wrote to memory of 4480	628	2024-06-25_e341d0b7ed5eb9267b8efc879c13ee10_bkransomware.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-06-25_e341d0b7ed5eb9267b8efc879c13ee10_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-25_e341d0b7ed5eb9267b8efc879c13ee10_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:628
- 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:4480

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=4440 --field-trial-handle=2248,i,10247514684337323751,15511974759131734137,262144 --variations-seed-version /prefetch:8
1⤵
PID:3612

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
cd536ab041338b3eacbfaa9675b8c4cc

SHA1
1b742aaaf8a16b1ae4237d2f92afebbf40891caa

SHA256
39c52e5771755713636d82f7fe6bd547f925c20cb7d0d167c30a54a22142ea88

SHA512
dd3a951f5b9961ef7215468e680b89ea9a8bf48263c643332dd5fcb96af384c8b1b36b366ebad678328c9a3262a607f9c86646da7466db5e1fdd29ffb64ba5e0

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C:\Users\Admin\AppData\Local\Temp\7Dw9ontVJr25L8H.exe

Filesize
71KB

MD5
9c4b7e1f2eeaaca4c0ba6bd00194e6e5

SHA1
27c6e9a65a4718e158d1d6776ed64b3528084985

SHA256
3437b7c356e2c0b42ea46d2863f164f81ee8c7a2879b6a17b9bc64d6667168f8

SHA512
fac625e390dee7de59b51c7d42111e656406e18245656f79ecb65bcf8d5d29f36c3c86978b5bc4283b04dffe95a8bdf91ff1bb8c74bf7850d0a4ca182de757ef

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C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads