3f6b97eb3b040a0534151a4a23f682b66b9c73337dfab82a5a0b1f45f8b04637

Analysis

max time kernel
149s
max time network
149s
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, 04:25

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General

Target
2026-04-17_a72384f303e674a888081ee007ea42cd_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_i.exe
Size 3.3MB
Sample260417-e1zp3sat71
SHA256 3f6b97eb3b040a0534151a4a23f682b66b9c73337dfab82a5a0b1f45f8b04637
MD5 a72384f303e674a888081ee007ea42cd
SHA1 6f7aa5bada9930aff5a6504d3a949ebd7a07d1f2
SHA512 63536c5fcd0b787313845bf9389070744ba155d07da94e91e12c1dcc5e327ff33ef37b27a6b8c1d48b922cb3fec3cf759bbf04c6c5f4b93fb53e91748ded669b
SSDEEP 49152:c/ev6F0To/ev6F0TVDd79WC0hmnf4baczOQKjKWQc2b1FVgbjrjxPe1pbPSQm1Fc:250p7Zn7ObKjKWQckVgtev5mnlNL4
TLSH
T1AFF5D00673E044B9E5B35535CAAB8615EB76BC620B2087CF1394967E1F337D0AE39B12
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/0x00090000000268e2-6.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\regedit.exe	2026-04-17_a72384f303e674a888081ee007ea42cd_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_i.exe
File created	C:\Windows\splwow64.exe	2026-04-17_a72384f303e674a888081ee007ea42cd_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_i.exe
File created	C:\Windows\winhlp32.exe	2026-04-17_a72384f303e674a888081ee007ea42cd_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_i.exe
File created	C:\Windows\write.exe	2026-04-17_a72384f303e674a888081ee007ea42cd_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_i.exe
File created	C:\Windows\hh.exe	2026-04-17_a72384f303e674a888081ee007ea42cd_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_i.exe
File created	C:\Windows\notepad.exe	2026-04-17_a72384f303e674a888081ee007ea42cd_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_i.exe
File created	C:\Windows\bfsvc.exe	2026-04-17_a72384f303e674a888081ee007ea42cd_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_i.exe
File created	C:\Windows\explorer.exe	2026-04-17_a72384f303e674a888081ee007ea42cd_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_i.exe
File created	C:\Windows\HelpPane.exe	2026-04-17_a72384f303e674a888081ee007ea42cd_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_i.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
4388	notepad.exe

Suspicious use of WriteProcessMemory 1 IoCs

description	pid	Process	procid_target
PID 2648 wrote to memory of 4388	2648	2026-04-17_a72384f303e674a888081ee007ea42cd_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_i.exe	81

C:\Users\Admin\AppData\Local\Temp\2026-04-17_a72384f303e674a888081ee007ea42cd_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_i.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-17_a72384f303e674a888081ee007ea42cd_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_i.exe"
1⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2648
- C:\Windows\System32\notepad.exe
  "C:\Windows\System32\notepad.exe" C:\Users\Admin\AppData\Local\Temp\WEL3BAC.tmp
  2⤵
  - Opens file in notepad (likely ransom note)
  PID:4388

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 3.8MB
SHA256 0227409e30e1b092a6b25cfd118108b41b491867b0d3c8c23e1c76d0497b6e3b
MD5 cdb270042d98810f886a54da62c0aedf
SHA1 b54011ae205b8a920cc9799642fc09e2dd822bcd
SHA512 cca93ab9395b01cdf49e2a392206855998cefb4137e00ea88e4ebd2ff5626f300f20e48baf4e43a76ea183828a2bd283120dce980393d581998bcc17d470dff4
SSDEEP 98304:250p7Zn7ObKjKWQckVgtev5mnlNL4jPF:256ZnSoKWQc0gEYnvL4jP
TLSH
T14606D01273E040B6E5B35635C966C620EF76B8251B2087CF53949A7E2F336D1EE3A712
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WEL3BAC.tmp

Path C:\Users\Admin\AppData\Local\Temp\WEL3BAC.tmp
Size 52B
SHA256 be0909be27235c36586ceb9b7e37d8d74c423d9460c4dbf0e2417fcf58b96caa
MD5 17ddbb82a40e2ac704e1045da8fb1cf6
SHA1 a570cdbc16483567fe1439903b212e33b15343b7
SHA512 031adfce17522c42262d40acb75f1db7a1942e4965ab505ee3a5b7001e07a3f16182a4093a3e9a3b99b50860bbc66205a9956b4d8da76adb823054aae6598da2
TLSH
T1449002F35491D6301587051611E8118616566D9675199405E00811251AB56520515DDA
MD5 SHA1 SHA512 TLSH