383e04cc53d06cdf31235cbce56c3b6f7ad8a3def771fd723ff9648db87d1adb

Analysis

max time kernel
133s
max time network
131s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
29-05-2024 11:57

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General

Target

2024-05-29_694389f5fe3d942957d3057cde4b3084_bkransomware.exe
Size

71KB
MD5

694389f5fe3d942957d3057cde4b3084
SHA1

d3f5db605c9cfebd61b228cf5744fcc8f6cffd78
SHA256

383e04cc53d06cdf31235cbce56c3b6f7ad8a3def771fd723ff9648db87d1adb
SHA512

b41c11b453293b353d1b1113d62139b762bfc94520937ff58a130b88d1666e3adb61cdb5c4ecc893db430459c1c43f2a926147e4c3b1b921a6798f48d1706a46
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTS:ZhpAyazIlyazTS

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1376	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"	2024-05-29_694389f5fe3d942957d3057cde4b3084_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	2024-05-29_694389f5fe3d942957d3057cde4b3084_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3848	2024-05-29_694389f5fe3d942957d3057cde4b3084_bkransomware.exe
Token: SeDebugPrivilege	1376	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3848 wrote to memory of 1376	3848	2024-05-29_694389f5fe3d942957d3057cde4b3084_bkransomware.exe	91
PID 3848 wrote to memory of 1376	3848	2024-05-29_694389f5fe3d942957d3057cde4b3084_bkransomware.exe	91
PID 3848 wrote to memory of 1376	3848	2024-05-29_694389f5fe3d942957d3057cde4b3084_bkransomware.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-05-29_694389f5fe3d942957d3057cde4b3084_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-29_694389f5fe3d942957d3057cde4b3084_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3848
- 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:1376

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 --field-trial-handle=1032,i,13640054265074968359,8146127767143474550,262144 --variations-seed-version --mojo-platform-channel-handle=4176 /prefetch:8
1⤵
PID:2600

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
393KB

MD5
a90d84c8edbc0693cd5fb781f265bcbb

SHA1
68bb11c495d3e395e698086c5f43c0a14f790c75

SHA256
9138be1b75cfac425d778ec67c63cb72bafe2cf7010226790a42a4e49bad9983

SHA512
e123000f6f1013f437a9693425f0dd6ddbd909b96c332b1b7df5d3ff2ebb8014ddf6a6dda66f091496b47cbe28dad31934dfd175b2c8c31a670df993b46e88d4

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C:\Users\Admin\AppData\Local\Temp\dX7YAkq9btGLJud.exe

Filesize
71KB

MD5
531c7910b984d21e1141066be3570922

SHA1
f3070f7f75c351ee2049c4acbbe86d26866ca100

SHA256
fa92bba4f806a199003b2d1d2e54206d078557cf199f953fffe801d73c36ff1e

SHA512
2f35e1eab7f499d15da57297a0e961ba6e676515ad58daacf9dea703f34f7872be4833faa4b97153591c398ff8bd6eecbdcf4a1770e5caa44ec4f946f922aea6

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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

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Downloads