warmcookie | f4d2c9470b322af29b9188a3a590cbe85bacb9cc8fcd7c2e94d82271ded3f659

Resubmissions

14/08/2024, 23:31

240814-3hse2sxalr 10

14/08/2024, 16:54

240814-vejdzashka 8

Analysis

max time kernel
146s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
14/08/2024, 23:31

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General

Target

random.dll
Size

155KB
MD5

7a799f4f9aa63745a75b901a392aff29
SHA1

b9983463f637191ba12c2270ac52a547676a7037
SHA256

f4d2c9470b322af29b9188a3a590cbe85bacb9cc8fcd7c2e94d82271ded3f659
SHA512

e9eeb340dd620256d543ab43d08ccc23b555afa332c744c629fd8f40760f20a24e234955fc8d2e78a150f09028ca7a11650e0da157fff64833f13ce89a208c23
SSDEEP

3072:0lCt2jrijQEjnMUWzsjhVPbuGHUluQj6vkZD4vP5iZWyLr:QCIrijNMv6XPbr0kuNr

Score

10^/10

warmcookie backdoor discovery

Malware Config

Signatures

Detect Warmcookie payload. 1 IoCs

Detects Warmcookie payload.

backdoor

resource	yara_rule
behavioral1/files/0x0007000000023440-2.dat	Warmcookie

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

Blocklisted process makes network request 24 IoCs

flow	pid	Process
31	3800	rundll32.exe
33	3800	rundll32.exe
37	3800	rundll32.exe
38	3800	rundll32.exe
44	3800	rundll32.exe
45	3800	rundll32.exe
46	3800	rundll32.exe
50	3800	rundll32.exe
54	3800	rundll32.exe
55	3800	rundll32.exe
56	3800	rundll32.exe
57	3800	rundll32.exe
58	3800	rundll32.exe
62	3800	rundll32.exe
65	3800	rundll32.exe
76	3800	rundll32.exe
77	3800	rundll32.exe
78	3800	rundll32.exe
79	3800	rundll32.exe
80	3800	rundll32.exe
81	3800	rundll32.exe
82	3800	rundll32.exe
83	3800	rundll32.exe
84	3800	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
3800	rundll32.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE\XBX38B2G.htm	rundll32.exe

Drops file in Windows directory 1 IoCs

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

Checks processor information in registry 2 TTPs 5 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor	rundll32.exe
Key enumerated	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor	rundll32.exe
Key queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe

Modifies data under HKEY_USERS 3 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	rundll32.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	rundll32.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	rundll32.exe

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\random.dll
1⤵
- Drops file in Windows directory
PID:2592

C:\Windows\system32\rundll32.exe
C:\Windows\system32\rundll32.exe "C:\ProgramData\Software Allies\Updater.dll",Start /u
1⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Drops file in System32 directory
- Checks processor information in registry
- Modifies data under HKEY_USERS
PID:3800

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\Software Allies\Updater.dll

Filesize
155KB

MD5
7a799f4f9aa63745a75b901a392aff29

SHA1
b9983463f637191ba12c2270ac52a547676a7037

SHA256
f4d2c9470b322af29b9188a3a590cbe85bacb9cc8fcd7c2e94d82271ded3f659

SHA512
e9eeb340dd620256d543ab43d08ccc23b555afa332c744c629fd8f40760f20a24e234955fc8d2e78a150f09028ca7a11650e0da157fff64833f13ce89a208c23

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