aafb71ff3b7dbc599fa70f1a4ac8058b233fb7c66979ccc90f95e2f93efc6d41

Analysis

max time kernel
149s
max time network
156s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
17/04/2026, 03:51

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General

Target
2026-04-17_735f37b94d050ca2bc7421906e7f1424_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_l.exe
Size 4.9MB
Sample260417-eegmdaew7r
SHA256 aafb71ff3b7dbc599fa70f1a4ac8058b233fb7c66979ccc90f95e2f93efc6d41
MD5 735f37b94d050ca2bc7421906e7f1424
SHA1 dc709201c623e8acf9359f26f5a3f033af7c008d
SHA512 97bd61b52a04769d0dc4366a932d998a0ae80ce675abd35e72a606d194723ce0e93bbab71bb28d73f7cfb4fea8fb1dce69bbe2d25bcf3e5a0c72bc8a730a3327
SSDEEP 98304:BllR0llRbn7OQsC6UW1PszrllR0llRbn7OQsC6UW1Pszw://C/bnSQsTxsF/C/bnSQsTxsk
TLSH
T1BA36AE2177F50832E2B329315B7196A10E3BBA650B34D58F2398199E5F33BC09E36797
MD5 SHA1 SHA512 SSDEEP TLSH

Score

9^/10

ransomware spyware stealer

Malware Config

Signatures

UPX dump on OEP (original entry point) 1 IoCs

resource	yara_rule
behavioral2/files/0x000f000000025f8f-6.dat	UPX

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

Drops file in Windows directory 9 IoCs

description	ioc	Process
File created	C:\Windows\HelpPane.exe	2026-04-17_735f37b94d050ca2bc7421906e7f1424_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_l.exe
File created	C:\Windows\notepad.exe	2026-04-17_735f37b94d050ca2bc7421906e7f1424_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_l.exe
File created	C:\Windows\write.exe	2026-04-17_735f37b94d050ca2bc7421906e7f1424_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_l.exe
File created	C:\Windows\bfsvc.exe	2026-04-17_735f37b94d050ca2bc7421906e7f1424_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_l.exe
File created	C:\Windows\explorer.exe	2026-04-17_735f37b94d050ca2bc7421906e7f1424_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_l.exe
File created	C:\Windows\hh.exe	2026-04-17_735f37b94d050ca2bc7421906e7f1424_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_l.exe
File created	C:\Windows\regedit.exe	2026-04-17_735f37b94d050ca2bc7421906e7f1424_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_l.exe
File created	C:\Windows\splwow64.exe	2026-04-17_735f37b94d050ca2bc7421906e7f1424_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_l.exe
File created	C:\Windows\winhlp32.exe	2026-04-17_735f37b94d050ca2bc7421906e7f1424_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_l.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
1592	notepad.exe

Suspicious use of WriteProcessMemory 1 IoCs

description	pid	Process	procid_target
PID 2728 wrote to memory of 1592	2728	2026-04-17_735f37b94d050ca2bc7421906e7f1424_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_l.exe	81

C:\Users\Admin\AppData\Local\Temp\2026-04-17_735f37b94d050ca2bc7421906e7f1424_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_l.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-17_735f37b94d050ca2bc7421906e7f1424_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_l.exe"
1⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2728
- C:\Windows\System32\notepad.exe
  "C:\Windows\System32\notepad.exe" C:\Users\Admin\AppData\Local\Temp\WEL299B.tmp
  2⤵
  - Opens file in notepad (likely ransom note)
  PID:1592

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

vcredist_x86.exe

Path C:\ProgramData\Package Cache\{61087a79-ac85-455c-934d-1fa22cc64f36}\vcredist_x86.exe
Size 5.3MB
SHA256 bc7a0e1731cf8aaa78103ef5295a68eaca20625cbed28138d398c20d743c6520
MD5 e9657717c0cee65239bc8ddcd7975c41
SHA1 f1a60d4920387e5b99909ff20fa71e3101e3ec73
SHA512 0477372afa7044545dc446c93ddf00aa42ef862554010a812b92b99007ccfe0c30a05efbc51e15e20273d41a7edb119ef980894ca81a8c49863de6ba13e0d3fd
SSDEEP 98304:BllR0llRbn7OQsC6UW1PszrllR0llRbn7OQsC6UW1PszePF://C/bnSQsTxsF/C/bnSQsTxsaP
TLSH
T1E146AE2177F44832E2F329319B7596A00E3ABA650B34D58F2398199E5F37BC09A37753
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WEL299B.tmp

Path C:\Users\Admin\AppData\Local\Temp\WEL299B.tmp
Size 52B
SHA256 be0909be27235c36586ceb9b7e37d8d74c423d9460c4dbf0e2417fcf58b96caa
MD5 17ddbb82a40e2ac704e1045da8fb1cf6
SHA1 a570cdbc16483567fe1439903b212e33b15343b7
SHA512 031adfce17522c42262d40acb75f1db7a1942e4965ab505ee3a5b7001e07a3f16182a4093a3e9a3b99b50860bbc66205a9956b4d8da76adb823054aae6598da2
TLSH
T1449002F35491D6301587051611E8118616566D9675199405E00811251AB56520515DDA
MD5 SHA1 SHA512 TLSH