971b98b079fdcd05ac60afa59de2b575ad92a7d118ca5e5906a9d8e71120e9ad

Analysis

max time kernel
149s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
16/04/2026, 00:52

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General

Target
2026-04-16_10479c2e805b03d88f2f4d135efcda4d_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_i.exe
Size 4.0MB
Sample260416-a79readv8p
SHA256 971b98b079fdcd05ac60afa59de2b575ad92a7d118ca5e5906a9d8e71120e9ad
MD5 10479c2e805b03d88f2f4d135efcda4d
SHA1 58b7b0ce2280e11b3b631cdcc5cc02fdcf7d2278
SHA512 474c6d71eda49dceafaf97365e931d65e7fc7c28371b75a137a48a526aeb4941e93c3094380a8c5228a003398d4de0ebdae03455263f8356d94b8abb2ae15352
SSDEEP 98304:nn7ON5wO4q75Av7fbUhabgXKjKWQckVgtev5mnlNL4zq:nnSN5wO4q7+zUhascKWQc0gEYnvL4zq
TLSH
T191169D2C6EE451A6D472C675C8A1A5D9FE31B8126B005FCF21D1634E0E3BBD2AC35F29
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\hh.exe	2026-04-16_10479c2e805b03d88f2f4d135efcda4d_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_i.exe
File created	C:\Windows\splwow64.exe	2026-04-16_10479c2e805b03d88f2f4d135efcda4d_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_i.exe
File created	C:\Windows\write.exe	2026-04-16_10479c2e805b03d88f2f4d135efcda4d_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_i.exe
File created	C:\Windows\bfsvc.exe	2026-04-16_10479c2e805b03d88f2f4d135efcda4d_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_i.exe
File created	C:\Windows\notepad.exe	2026-04-16_10479c2e805b03d88f2f4d135efcda4d_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_i.exe
File created	C:\Windows\regedit.exe	2026-04-16_10479c2e805b03d88f2f4d135efcda4d_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_i.exe
File created	C:\Windows\winhlp32.exe	2026-04-16_10479c2e805b03d88f2f4d135efcda4d_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_i.exe
File created	C:\Windows\explorer.exe	2026-04-16_10479c2e805b03d88f2f4d135efcda4d_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_i.exe
File created	C:\Windows\HelpPane.exe	2026-04-16_10479c2e805b03d88f2f4d135efcda4d_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
860	notepad.exe

Suspicious use of WriteProcessMemory 1 IoCs

description	pid	Process	procid_target
PID 3076 wrote to memory of 860	3076	2026-04-16_10479c2e805b03d88f2f4d135efcda4d_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_i.exe	81

C:\Users\Admin\AppData\Local\Temp\2026-04-16_10479c2e805b03d88f2f4d135efcda4d_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_i.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-16_10479c2e805b03d88f2f4d135efcda4d_amadey_cobalt-strike_coinminer_hellokitty_hijackloader_i.exe"
1⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:3076
- C:\Windows\System32\notepad.exe
  "C:\Windows\System32\notepad.exe" C:\Users\Admin\AppData\Local\Temp\WEL25C.tmp
  2⤵
  - Opens file in notepad (likely ransom note)
  PID:860

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 4.4MB
SHA256 016f1ffc9d426a019c59481fd0f773cedf577a443ca353cf9a511169caa279b2
MD5 83611152607a1c56be2748f3845bdfe1
SHA1 b7af2bedde30c99782013ed86a0ba44056989022
SHA512 60bef570f7cb81915aefe5d7218875c150fc65a8ed178c65f07f35f8070d1febd7dea9f0860ea9487c46ec39fdbeac23339a2a3d68fcf291985f976a5ff974d8
SSDEEP 98304:nn7ON5wO4q75Av7fbUhabgXKjKWQckVgtev5mnlNL4zIPF:nnSN5wO4q7+zUhascKWQc0gEYnvL4zIP
TLSH
T1F8269D3C6EA441A6D5728675C8A1E5D9FE31B8122B005FCF12D1630E0E3BBD2AD75F29
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WEL25C.tmp

Path C:\Users\Admin\AppData\Local\Temp\WEL25C.tmp
Size 52B
SHA256 be0909be27235c36586ceb9b7e37d8d74c423d9460c4dbf0e2417fcf58b96caa
MD5 17ddbb82a40e2ac704e1045da8fb1cf6
SHA1 a570cdbc16483567fe1439903b212e33b15343b7
SHA512 031adfce17522c42262d40acb75f1db7a1942e4965ab505ee3a5b7001e07a3f16182a4093a3e9a3b99b50860bbc66205a9956b4d8da76adb823054aae6598da2
TLSH
T1449002F35491D6301587051611E8118616566D9675199405E00811251AB56520515DDA
MD5 SHA1 SHA512 TLSH