warmcookie | c4e9ccca525c21d719b3ee8547e84934942d1d18cd96374eb61c2e99cdd7f103

Analysis

max time kernel
1199s
max time network
1201s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
13/11/2024, 13:52

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General

Target

launcher.bat
Size

61B
MD5

71fc33d2c87facdfbb2499300fc2bedd
SHA1

40ab3ac01282ce3c4df44afc5e73c6d7a7502430
SHA256

2f36e33a436d6f565230ba1dafc9dea801599d47a9ff3fbb940a200f43d8b3ae
SHA512

588b393c79c7ca748f4b4cc8fbffd7d221956bfcf9e8c4b73a0fd6d84527ecad050c5a9312fb608fc1cf276fb0149777a8d551b64af0869680beb17ff0670f2d

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 64 IoCs

flow	pid	Process
1	4920	rundll32.exe
2	4920	rundll32.exe
4	4920	rundll32.exe
5	4920	rundll32.exe
6	4920	rundll32.exe
7	4920	rundll32.exe
8	4920	rundll32.exe
9	4920	rundll32.exe
10	4920	rundll32.exe
11	4920	rundll32.exe
12	4920	rundll32.exe
13	4920	rundll32.exe
15	4920	rundll32.exe
16	4920	rundll32.exe
17	4920	rundll32.exe
18	4920	rundll32.exe
19	4920	rundll32.exe
20	4920	rundll32.exe
21	4920	rundll32.exe
22	4920	rundll32.exe
23	4920	rundll32.exe
24	4920	rundll32.exe
25	4920	rundll32.exe
26	4920	rundll32.exe
27	4920	rundll32.exe
28	4920	rundll32.exe
29	4920	rundll32.exe
30	4920	rundll32.exe
31	4920	rundll32.exe
32	4920	rundll32.exe
33	4920	rundll32.exe
34	4920	rundll32.exe
35	4920	rundll32.exe
36	4920	rundll32.exe
37	4920	rundll32.exe
38	4920	rundll32.exe
39	4920	rundll32.exe
40	4920	rundll32.exe
41	4920	rundll32.exe
42	4920	rundll32.exe
43	4920	rundll32.exe
44	4920	rundll32.exe
45	4920	rundll32.exe
46	4920	rundll32.exe
47	4920	rundll32.exe
48	4920	rundll32.exe
49	4920	rundll32.exe
50	4920	rundll32.exe
51	4920	rundll32.exe
52	4920	rundll32.exe
53	4920	rundll32.exe
54	4920	rundll32.exe
55	4920	rundll32.exe
56	4920	rundll32.exe
57	4920	rundll32.exe
58	4920	rundll32.exe
59	4920	rundll32.exe
60	4920	rundll32.exe
61	4920	rundll32.exe
62	4920	rundll32.exe
63	4920	rundll32.exe
64	4920	rundll32.exe
66	4920	rundll32.exe
67	4920	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
4920	rundll32.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\Solid Digital.job	rundll32.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

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3924 wrote to memory of 3304	3924	cmd.exe	81
PID 3924 wrote to memory of 3304	3924	cmd.exe	81

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\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\launcher.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:3924
- C:\Windows\system32\rundll32.exe
  rundll32.exe Updater.dll,Start
  2⤵
  - Drops file in Windows directory
  PID:3304

C:\Windows\system32\rundll32.exe
C:\Windows\system32\rundll32.exe "C:\ProgramData\Solid Digital\Updater.dll",Start /u
1⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Modifies data under HKEY_USERS
PID:4920

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

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Downloads

C:\ProgramData\Solid Digital\Updater.dll

Filesize
129KB

MD5
e08edc1510052adc297d6af47022a70b

SHA1
f08af6d4a2f9655beb8219aca5711400efed8670

SHA256
915a80abb43f04fcdfb9ba2ced3b38f3524c050b6c0a36d97f4e7827916248b2

SHA512
2b91019e3d96b57362719b9bddb7b894239977266d23e2c8b9ebbcd93a9ba748491b96a92c1b4fd1876e74a3b7f3da99b89bb0e38a463a8ae9f357d9d9f66652

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