05cb081db78dd2b62385f83eaca32c76efa8b11db779b51afe312382a0629527

Analysis

max time kernel
143s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
25/04/2024, 10:35

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General

Target

2024-04-25_5b5c2c48c4edf1737a4610b0e7a21940_bkransomware.exe
Size

73KB
MD5

5b5c2c48c4edf1737a4610b0e7a21940
SHA1

44374517d21d07c35fc61e899d560975ce3cf166
SHA256

05cb081db78dd2b62385f83eaca32c76efa8b11db779b51afe312382a0629527
SHA512

8cc506cf995a5f9a0d30f4501d0cb6c8258eec90d5fe4fa07face93c3feaeabcfc72cea9ad76d17fe22e7490a3d689d4ff1b5b40cd8c6427565c2f08a5c0b716
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTH:ZhpAyazIlyazTH

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4776	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"	2024-04-25_5b5c2c48c4edf1737a4610b0e7a21940_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	2024-04-25_5b5c2c48c4edf1737a4610b0e7a21940_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5088	2024-04-25_5b5c2c48c4edf1737a4610b0e7a21940_bkransomware.exe
Token: SeDebugPrivilege	4776	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 5088 wrote to memory of 4776	5088	2024-04-25_5b5c2c48c4edf1737a4610b0e7a21940_bkransomware.exe	92
PID 5088 wrote to memory of 4776	5088	2024-04-25_5b5c2c48c4edf1737a4610b0e7a21940_bkransomware.exe	92
PID 5088 wrote to memory of 4776	5088	2024-04-25_5b5c2c48c4edf1737a4610b0e7a21940_bkransomware.exe	92

C:\Users\Admin\AppData\Local\Temp\2024-04-25_5b5c2c48c4edf1737a4610b0e7a21940_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-25_5b5c2c48c4edf1737a4610b0e7a21940_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5088
- 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:4776

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=1032 --field-trial-handle=2328,i,5873823382323802923,13134441441264702821,262144 --variations-seed-version /prefetch:8
1⤵
PID:4412

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
3d2e8a049b30e7e6e3da818e0f881c30

SHA1
63bcd4a14a86a8c2143b2cb81d79304032cb3b4b

SHA256
cbc91306d8ecf5031c774374c84a0df75d9f2a9c5d98cad310db204cfcbb7913

SHA512
9492ec3349c65e1d325b5a5972f00072ab3d832da4864ebea64181aa944238fdd2a629fd97706a499a5c8fc1b22fb819dba4014648e73192a6fdf485b2c33262

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C:\Users\Admin\AppData\Local\Temp\EJewrpGNgN6A3MI.exe

Filesize
73KB

MD5
6c3000c498749befeef41ce312ae8ef0

SHA1
4d4841a0ac245af9716bf46055dbb8b4f149d42e

SHA256
bba8dd5ed811519750928148b9eb85e25f2d5f95198a115e70373216a68e0ad3

SHA512
1d32190d7aa8c2e437738a3c23d5f68e3b55ea8eeb46ec5f8b4a3cbc5f4ddff9ffa24d05f55a3b21a7e66b1d26fea691410635a353ded8874d754782df479b1a

Download Submit
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

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Downloads