b732cd56ad5917c6e082eb84073c11575c1b4db0560d5257a204112d081c7bae

Analysis

max time kernel
125s
max time network
127s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
submitted
13/06/2024, 04:25

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General

Target
2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exe
Size 71KB
Sample240613-e2dt1atgqe
SHA256 b732cd56ad5917c6e082eb84073c11575c1b4db0560d5257a204112d081c7bae
MD5 3a5b1baa996b35b243dd161b3e4b292a
SHA1 998fc1e4f533139fa5a4205305c99b58e2aaab15
SHA512 6148ae456f6faa526e76ff00ff61514ee831e060890fc3a70dd59be23ddbe4f02204dc2e0cc30e2d993208e0a870b9a1431c5bc836ad30a3d0a8019d9ff1a429
SSDEEP 1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTC:ZhpAyazIlyazTC
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
3184	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"	CTS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\CTS.exe	2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3100	2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exe
Token: SeDebugPrivilege	3184	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3100 wrote to memory of 3184	3100	2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exe	89
PID 3100 wrote to memory of 3184	3100	2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exe	89
PID 3100 wrote to memory of 3184	3100	2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-13_3a5b1baa996b35b243dd161b3e4b292a_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3100
- 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:3184

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 --field-trial-handle=4184,i,11751898164297348119,13021661521765644467,262144 --variations-seed-version --mojo-platform-channel-handle=3928 /prefetch:8
1⤵
PID:5040

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 392KB
SHA256 8df62214fb2962d81689b72154dc7d9d6f43ed2b06755857904fed0df4c53b43
MD5 f65e522a3861b2fafee1fce8fbfa9189
SHA1 a9261c3a222863d713b4975e1599b6fdcc4dc0da
SHA512 1c9454140882a4eccec2bcc400b256f1e164613dbf8b4d10e413c37a30cc6a804d8bc71c1646a48a88e2605fda4315dda27f753dd7abcb31da7a0f4f27bc4fc6
SSDEEP 12288:hS099EGXJdgx9GgRPF739d0FPIEsfXI8p:D/EQ7gx9G2t39d0uEUp
MD5 SHA1 SHA512 SSDEEP

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YU5YMXRpqiua8Dw.exe

Path C:\Users\Admin\AppData\Local\Temp\YU5YMXRpqiua8Dw.exe
Size 71KB
SHA256 3895687c754f7b6f702128f26ca5e2e604d9ad1a3d1b18147f6b74d858fe14da
MD5 26ef93be0287b6a63277afb2b6bd56ac
SHA1 19f4997052ab68f245e31d570571ee4f00e32f65
SHA512 1a969c92704fa26016ccb806848393720ee6cab9b67f5efac244599ada94be42e1658f2c313644f3e845e9eda040444d8dfa0925eb607b830622c352f25754e4
SSDEEP 1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTs:ZhpAyazIlyazTs
MD5 SHA1 SHA512 SSDEEP

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CTS.exe

Path C:\Windows\CTS.exe
Size 71KB
SHA256 075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
MD5 66df4ffab62e674af2e75b163563fc0b
SHA1 dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA512 1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25
SSDEEP 1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazT:ZhpAyazIlyazT
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