warmcookie | 371cf9bcf9a3d7b11d5ac386bef9450beac8c66a546fea1ca9cf629cdb751825 | Triage

Analysis

max time kernel
1786s
max time network
1788s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
22/08/2024, 15:26

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General

Target

Run-Malware-1.bat
Size

88B
MD5

2ee06c41fd75f8fabd7453d3e1240a49
SHA1

02b77c02c6c55b6f40ffc409860c66fda803f39f
SHA256

68082405a1e0bdf0a6109a0a22f93677bb25b2aba804c77f2536a8090cf1e0d0
SHA512

354f4fb40ce5248a68ae8a6dfdabe9476970841de22b875788f8b8ec12b529bd702d18ca9f3a1e13412c68f67a3d7326b2c37fdfa5b63ceffbb3ea85682c204c

Score

10^/10

warmcookie backdoor

Malware Config

Extracted

Family

warmcookie

C2

72.5.43.29

Attributes

mutex
a208f030-25f9-4f41-8b57-6b0b7ecccf29
user_agent
Mozilla / 5.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.0.3705)

Signatures

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

Blocklisted process makes network request 29 IoCs

flow	pid	Process
25	2180	rundll32.exe
53	2180	rundll32.exe
67	2180	rundll32.exe
68	2180	rundll32.exe
69	2180	rundll32.exe
70	2180	rundll32.exe
75	2180	rundll32.exe
76	2180	rundll32.exe
78	2180	rundll32.exe
79	2180	rundll32.exe
80	2180	rundll32.exe
81	2180	rundll32.exe
82	2180	rundll32.exe
83	2180	rundll32.exe
84	2180	rundll32.exe
85	2180	rundll32.exe
86	2180	rundll32.exe
87	2180	rundll32.exe
88	2180	rundll32.exe
89	2180	rundll32.exe
90	2180	rundll32.exe
91	2180	rundll32.exe
92	2180	rundll32.exe
93	2180	rundll32.exe
94	2180	rundll32.exe
95	2180	rundll32.exe
96	2180	rundll32.exe
97	2180	rundll32.exe
98	2180	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
2180	rundll32.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\Vermonster.job	rundll32.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3504 wrote to memory of 1036	3504	cmd.exe	85
PID 3504 wrote to memory of 1036	3504	cmd.exe	85

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\Run-Malware-1.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:3504
- C:\Windows\system32\rundll32.exe
  rundll32.exe f4d2c9470b322af29b9188a3a590cbe85bacb9cc8fcd7c2e94d82271ded3f659.dll, Start
  2⤵
  - Drops file in Windows directory
  PID:1036

C:\Windows\system32\rundll32.exe
C:\Windows\system32\rundll32.exe "C:\ProgramData\Vermonster\Updater.dll",Start /u
1⤵
- Blocklisted process makes network request
- Loads dropped DLL
PID:2180

Network

MITRE ATT&CK Matrix

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Downloads

C:\ProgramData\Vermonster\Updater.dll

Filesize
155KB

MD5
7a799f4f9aa63745a75b901a392aff29

SHA1
b9983463f637191ba12c2270ac52a547676a7037

SHA256
f4d2c9470b322af29b9188a3a590cbe85bacb9cc8fcd7c2e94d82271ded3f659

SHA512
e9eeb340dd620256d543ab43d08ccc23b555afa332c744c629fd8f40760f20a24e234955fc8d2e78a150f09028ca7a11650e0da157fff64833f13ce89a208c23

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