99acb0153f756f96c418e9e5b14d3148c3c9faba157786c2db199ac44be67c2c

Analysis

max time kernel
137s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
04/05/2024, 10:25

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General

Target

2024-05-04_0b9fdec44c17afee1305cfba0a5aa20b_bkransomware.exe
Size

214KB
MD5

0b9fdec44c17afee1305cfba0a5aa20b
SHA1

0e6fa5d6d451c3b6644a0ec5b77a5ea78ce7eb9f
SHA256

99acb0153f756f96c418e9e5b14d3148c3c9faba157786c2db199ac44be67c2c
SHA512

aa0ef5df434940de31bd8f8c1b6943875d4f2445c48692c1b6f15c816fafdff7b9594324b769a2a74b6aa9d11c4220c34f1ce5dcc8fa68aa320f67d0e4aa7202
SSDEEP

3072:ZhpAyazIlyazTmAvJMAgcayFHoh7YgB3u+2IcqUfN6eaTxvwGXVxuA3Yip:hZMazDMAFtFIWglu+kfNXaTGIeA3Yip

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
3472	eIByJGvIrRVt3Bn.exe
2780	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"	2024-05-04_0b9fdec44c17afee1305cfba0a5aa20b_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	2024-05-04_0b9fdec44c17afee1305cfba0a5aa20b_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4764	2024-05-04_0b9fdec44c17afee1305cfba0a5aa20b_bkransomware.exe
Token: SeDebugPrivilege	2780	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4764 wrote to memory of 3472	4764	2024-05-04_0b9fdec44c17afee1305cfba0a5aa20b_bkransomware.exe	91
PID 4764 wrote to memory of 3472	4764	2024-05-04_0b9fdec44c17afee1305cfba0a5aa20b_bkransomware.exe	91
PID 4764 wrote to memory of 2780	4764	2024-05-04_0b9fdec44c17afee1305cfba0a5aa20b_bkransomware.exe	93
PID 4764 wrote to memory of 2780	4764	2024-05-04_0b9fdec44c17afee1305cfba0a5aa20b_bkransomware.exe	93
PID 4764 wrote to memory of 2780	4764	2024-05-04_0b9fdec44c17afee1305cfba0a5aa20b_bkransomware.exe	93

C:\Users\Admin\AppData\Local\Temp\2024-05-04_0b9fdec44c17afee1305cfba0a5aa20b_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-04_0b9fdec44c17afee1305cfba0a5aa20b_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4764
- C:\Users\Admin\AppData\Local\Temp\eIByJGvIrRVt3Bn.exe
  C:\Users\Admin\AppData\Local\Temp\eIByJGvIrRVt3Bn.exe
  2⤵
  - Executes dropped EXE
  PID:3472
- 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:2780

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=5164 --field-trial-handle=3084,i,4016110471176367543,14287608422419064331,262144 --variations-seed-version /prefetch:8
1⤵
PID:2300

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
897a943e2762e153ca3a66555c85092b

SHA1
875b5ac29b1bc85bb3120831482d76e9ed756669

SHA256
bcc58a97c052cbb5d4d47dc80b8411b862fd4e3b2426e7d4161576921f7cf83b

SHA512
042a08a989e2ee20cdc0a83c0e41e637fc3bfc454e972ad58a46d1c86d1bb3d6fae43788eaac08efac9e08cb31ce15c33a1550ad632b31a34b02e723d38eea88

Download Submit
C:\Users\Admin\AppData\Local\Temp\eIByJGvIrRVt3Bn.exe

Filesize
143KB

MD5
2fdb371d45181dff59577110ba1064e2

SHA1
42a5833cb0ac90e38d734d1327bb3f7c7a6aa453

SHA256
80d7ec8ce3913d81ea5d4f304b8609e56f0e49778c52af9279e742ea54f4a155

SHA512
52982041ba9ca552b90b79b251501ec6c33c5251d09ca9969a1b179af2ec17aca6eb81db6e588e12751bcea04208e1da8d5a754a979dd98ceb3f50780aadea20

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit
memory/3472-8-0x00007FF894143000-0x00007FF894145000-memory.dmp

Filesize
8KB

Download
memory/3472-9-0x00000000000E0000-0x0000000000108000-memory.dmp

Filesize
160KB

Download
memory/3472-12-0x00007FF894140000-0x00007FF894C01000-memory.dmp

Filesize
10.8MB

Download
memory/3472-34-0x00007FF894140000-0x00007FF894C01000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads