badspace | c437e5caa4f644024014d40e62a5436c59046efc76c666ea3f83ab61df615314

General

Target

c437e5caa4f644024014d40e62a5436c59046efc76c666ea3f83ab61df615314.dll
Size

141KB
MD5

5fa10a64b7e1cfc3d8b8d45cefb6f837
SHA1

5f69a841cd4533ba671c1e6f73bd3b65d903f272
SHA256

c437e5caa4f644024014d40e62a5436c59046efc76c666ea3f83ab61df615314
SHA512

98f49ed14fe9fb14c6f0147ff53bb00969be5576f3e8a25ed1b35639390fbb7e88c440a51d451df644e72d2595ebe9748af01230b22400bd5b42ec87685b1306
SSDEEP

3072:HACxLpcTIhjZM3VhHSkYl8CagwurZvE9vV1ZQcR:HTtpcPlJSTl4PuG

Score

10^/10

badspace warmcookie backdoor discovery

Malware Config

Extracted

Family

warmcookie

C2

185.49.69.41

Attributes

mutex
5628919c-ac3f-4c57-89c9-7c71740b3c8e
user_agent
Mozilla / 4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1;.NET CLR 1.0.3705)

Signatures

BadSpace
A backdoor that is written in C++ and discovered in 2024.
backdoor badspace

Detects BadSpace backdoor 1 IoCs

resource	yara_rule
behavioral1/files/0x0031000000015d9c-2.dat	family_badspace

Warmcookie
Warmcookie is a backdoor written in C++.
backdoor warmcookie

Blocklisted process makes network request 2 IoCs

flow	pid	Process
4	2504	rundll32.exe
5	2504	rundll32.exe

Loads dropped DLL 4 IoCs

pid	Process
2504	rundll32.exe
2504	rundll32.exe
2504	rundll32.exe
2504	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 opened for modification	C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files\counters.dat	rundll32.exe

Drops file in Windows directory 1 IoCs

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

Modifies data under HKEY_USERS 18 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{42FB9790-6191-40B8-8E9C-954FB96BA2BE}\WpadDecision = "0"	rundll32.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\6e-df-a3-b6-a8-8f	rundll32.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\6e-df-a3-b6-a8-8f\WpadDecision = "0"	rundll32.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	rundll32.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	rundll32.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	rundll32.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f0137000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	rundll32.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{42FB9790-6191-40B8-8E9C-954FB96BA2BE}\WpadDecisionReason = "1"	rundll32.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{42FB9790-6191-40B8-8E9C-954FB96BA2BE}\6e-df-a3-b6-a8-8f	rundll32.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	rundll32.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{42FB9790-6191-40B8-8E9C-954FB96BA2BE}\WpadNetworkName = "Network 3"	rundll32.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\6e-df-a3-b6-a8-8f\WpadDecisionTime = 60ff6dd716ccda01	rundll32.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections	rundll32.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0"	rundll32.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	rundll32.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{42FB9790-6191-40B8-8E9C-954FB96BA2BE}	rundll32.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{42FB9790-6191-40B8-8E9C-954FB96BA2BE}\WpadDecisionTime = 60ff6dd716ccda01	rundll32.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\6e-df-a3-b6-a8-8f\WpadDecisionReason = "1"	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2904 wrote to memory of 2504	2904	taskeng.exe	29
PID 2904 wrote to memory of 2504	2904	taskeng.exe	29
PID 2904 wrote to memory of 2504	2904	taskeng.exe	29

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\c437e5caa4f644024014d40e62a5436c59046efc76c666ea3f83ab61df615314.dll
1⤵
- Drops file in Windows directory
PID:2700

C:\Windows\system32\taskeng.exe
taskeng.exe {C15209D7-CF94-48BE-B3CD-193592C5932B} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:2904
- C:\Windows\system32\rundll32.exe
  C:\Windows\system32\rundll32.exe "C:\ProgramData\RtlUpd\RtlUpd.dll",Start /p
  2⤵
  - Blocklisted process makes network request
  - Loads dropped DLL
  - Drops file in System32 directory
  - Modifies data under HKEY_USERS
  PID:2504

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\RtlUpd\RtlUpd.dll

Filesize
141KB

MD5
5fa10a64b7e1cfc3d8b8d45cefb6f837

SHA1
5f69a841cd4533ba671c1e6f73bd3b65d903f272

SHA256
c437e5caa4f644024014d40e62a5436c59046efc76c666ea3f83ab61df615314

SHA512
98f49ed14fe9fb14c6f0147ff53bb00969be5576f3e8a25ed1b35639390fbb7e88c440a51d451df644e72d2595ebe9748af01230b22400bd5b42ec87685b1306

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