warmcookie | c4e9ccca525c21d719b3ee8547e84934942d1d18cd96374eb61c2e99cdd7f103

Analysis

max time kernel
138s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
13/11/2024, 14:13

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General

Target

Updater.dll
Size

129KB
MD5

e08edc1510052adc297d6af47022a70b
SHA1

f08af6d4a2f9655beb8219aca5711400efed8670
SHA256

915a80abb43f04fcdfb9ba2ced3b38f3524c050b6c0a36d97f4e7827916248b2
SHA512

2b91019e3d96b57362719b9bddb7b894239977266d23e2c8b9ebbcd93a9ba748491b96a92c1b4fd1876e74a3b7f3da99b89bb0e38a463a8ae9f357d9d9f66652
SSDEEP

3072:Jhw2Pja55J8hTGMjctYnc/F5ipfVMFY3lz:Jhwv55WT7ctiiF5cV

Score

10^/10

warmcookie backdoor

Malware Config

Extracted

Family

warmcookie

Attributes

mutex
65abfc80-a660-4691-a919-130dc9b75b98

Signatures

Warmcookie family
warmcookie
Warmcookie, Badspace
Warmcookie aka Badspace is a backdoor written in C++.
backdoor warmcookie

Blocklisted process makes network request 11 IoCs

flow	pid	Process
27	2620	rundll32.exe
35	2620	rundll32.exe
36	2620	rundll32.exe
37	2620	rundll32.exe
41	2620	rundll32.exe
42	2620	rundll32.exe
43	2620	rundll32.exe
49	2620	rundll32.exe
50	2620	rundll32.exe
51	2620	rundll32.exe
52	2620	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
2620	rundll32.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\Tivix.job	regsvr32.exe

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	rundll32.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	rundll32.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	rundll32.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	rundll32.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	rundll32.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\Updater.dll
1⤵
- Drops file in Windows directory
PID:3092

C:\Windows\system32\rundll32.exe
C:\Windows\system32\rundll32.exe "C:\ProgramData\Tivix\Updater.dll",Start /u
1⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Modifies data under HKEY_USERS
PID:2620

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\Tivix\Updater.dll

Filesize
129KB

MD5
e08edc1510052adc297d6af47022a70b

SHA1
f08af6d4a2f9655beb8219aca5711400efed8670

SHA256
915a80abb43f04fcdfb9ba2ced3b38f3524c050b6c0a36d97f4e7827916248b2

SHA512
2b91019e3d96b57362719b9bddb7b894239977266d23e2c8b9ebbcd93a9ba748491b96a92c1b4fd1876e74a3b7f3da99b89bb0e38a463a8ae9f357d9d9f66652

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