21a0d3b799b16f63c7c6488432c467346ccf36f3172bdd5333f418f9f8095dfe

Analysis

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

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
10/06/2024, 05:48

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General

Target

2024-06-10_aedca1fcb21b50f2c6179257585c2a2a_bkransomware.exe
Size

96KB
MD5

aedca1fcb21b50f2c6179257585c2a2a
SHA1

d1b1a7f4da5ee987384546a2d18af301900a38fa
SHA256

21a0d3b799b16f63c7c6488432c467346ccf36f3172bdd5333f418f9f8095dfe
SHA512

d2aac30558d858572fbc608e924142fd7b58bcaacee72c90288b2e3fb514d23bd589de6e6ef95082990d2aa69edc26ca8d3110a8deda3e36252566ec64b937b7
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTS1ujH+zyAKsYCy8PdtzG:ZhpAyazIlyazTS1uCmAKRl8Fs

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
3148	WStnfGerkV2Z0e9.exe
4564	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"	2024-06-10_aedca1fcb21b50f2c6179257585c2a2a_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	2024-06-10_aedca1fcb21b50f2c6179257585c2a2a_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	932	2024-06-10_aedca1fcb21b50f2c6179257585c2a2a_bkransomware.exe
Token: SeDebugPrivilege	4564	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 932 wrote to memory of 3148	932	2024-06-10_aedca1fcb21b50f2c6179257585c2a2a_bkransomware.exe	89
PID 932 wrote to memory of 3148	932	2024-06-10_aedca1fcb21b50f2c6179257585c2a2a_bkransomware.exe	89
PID 932 wrote to memory of 4564	932	2024-06-10_aedca1fcb21b50f2c6179257585c2a2a_bkransomware.exe	91
PID 932 wrote to memory of 4564	932	2024-06-10_aedca1fcb21b50f2c6179257585c2a2a_bkransomware.exe	91
PID 932 wrote to memory of 4564	932	2024-06-10_aedca1fcb21b50f2c6179257585c2a2a_bkransomware.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-06-10_aedca1fcb21b50f2c6179257585c2a2a_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-10_aedca1fcb21b50f2c6179257585c2a2a_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:932
- C:\Users\Admin\AppData\Local\Temp\WStnfGerkV2Z0e9.exe
  C:\Users\Admin\AppData\Local\Temp\WStnfGerkV2Z0e9.exe
  2⤵
  - Executes dropped EXE
  PID:3148
- 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:4564

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=1304,i,2607710392823067546,4648797561512801463,262144 --variations-seed-version --mojo-platform-channel-handle=4456 /prefetch:8
1⤵
PID:3964

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
394KB

MD5
93ef67f4c1a1ab6fedb0c037c3588816

SHA1
6a8454506648adf1803008951942a118c581959d

SHA256
95e01adeb34f7d47bb154d64323a904cb21f8799b75c8d741e2f94c8bea674bd

SHA512
01790261d82e930fbdf62a008fcc9b18e7b556b52ff55247f862fc2e229cdfe5c7d4fcde3239e784af365e5a74709add0ab4cf713d85381b941199b762cf75c3

Download Submit
C:\Users\Admin\AppData\Local\Temp\WStnfGerkV2Z0e9.exe

Filesize
25KB

MD5
abbd49c180a2f8703f6306d6fa731fdc

SHA1
d63f4bfe7f74936b2fbace803e3da6103fbf6586

SHA256
5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1

SHA512
290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit
memory/3148-15-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads