warmcookie | f47144c7159be31d8116fdc36b66cb72c917cd91a4bbe9eaa55dec929c1cffdd

General

Target

f47144c7159be31d8116fdc36b66cb72c917cd91a4bbe9eaa55dec929c1cffdd.dll
Size

129KB
MD5

80cd37d9eb33507bf054f32ce2380b09
SHA1

6e8d57dde537ace0639931569ae2b04b9cb99a26
SHA256

f47144c7159be31d8116fdc36b66cb72c917cd91a4bbe9eaa55dec929c1cffdd
SHA512

18f42496c4a66f11aa834e1db7f727ea7041882408a83be00f5ddacfbca439debe611f24eadd19e9453bc774d91d33d98ac25290791d501af2e706dc9ef89bde
SSDEEP

3072:Jhw2Pja55J8hTGMjctYnc/F5ipfVMFY1lz:Jhwv55WT7ctiiF5cv

Score

10^/10

warmcookie backdoor discovery

Malware Config

Extracted

Family

warmcookie

C2

185.161.251.26

Attributes

mutex
5bba9e40-0e32-4b7f-b39a-667bbc0c2293
user_agent
Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:109.0) Gecko/20100101 Firefox/115.0

Signatures

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

Blocklisted process makes network request 16 IoCs

flow	pid	Process
4	2572	rundll32.exe
5	2572	rundll32.exe
6	2572	rundll32.exe
7	2572	rundll32.exe
8	2572	rundll32.exe
9	2572	rundll32.exe
11	2572	rundll32.exe
12	2572	rundll32.exe
13	2572	rundll32.exe
14	2572	rundll32.exe
15	2572	rundll32.exe
16	2572	rundll32.exe
18	2572	rundll32.exe
19	2572	rundll32.exe
20	2572	rundll32.exe
21	2572	rundll32.exe

Loads dropped DLL 4 IoCs

pid	Process
2572	rundll32.exe
2572	rundll32.exe
2572	rundll32.exe
2572	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\Ventuso LLC.job	regsvr32.exe

Modifies data under HKEY_USERS 25 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\26-51-66-76-0b-0e	rundll32.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\26-51-66-76-0b-0e\WpadDecisionReason = "1"	rundll32.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\26-51-66-76-0b-0e\WpadDecisionTime = 004af9282343db01	rundll32.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	rundll32.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3326A172-8694-4A10-8B22-30CCE1B66BAA}\WpadDecision = "0"	rundll32.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\26-51-66-76-0b-0e\WpadDecision = "0"	rundll32.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000005000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00fa000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	rundll32.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3326A172-8694-4A10-8B22-30CCE1B66BAA}\WpadDecisionTime = 402d485c2343db01	rundll32.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\26-51-66-76-0b-0e\WpadDecisionTime = 402d485c2343db01	rundll32.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections	rundll32.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	rundll32.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0"	rundll32.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3326A172-8694-4A10-8B22-30CCE1B66BAA}\WpadNetworkName = "Network 3"	rundll32.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3326A172-8694-4A10-8B22-30CCE1B66BAA}\26-51-66-76-0b-0e	rundll32.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\26-51-66-76-0b-0e\WpadDetectedUrl	rundll32.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000004000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00fa000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	rundll32.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	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	rundll32.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3326A172-8694-4A10-8B22-30CCE1B66BAA}\WpadDecisionReason = "1"	rundll32.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3326A172-8694-4A10-8B22-30CCE1B66BAA}\WpadDecisionTime = 004af9282343db01	rundll32.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3326A172-8694-4A10-8B22-30CCE1B66BAA}\WpadDecisionTime = 607ea5422343db01	rundll32.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\26-51-66-76-0b-0e\WpadDecisionTime = 607ea5422343db01	rundll32.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00fa000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	rundll32.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3326A172-8694-4A10-8B22-30CCE1B66BAA}	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2912 wrote to memory of 2572	2912	taskeng.exe	31
PID 2912 wrote to memory of 2572	2912	taskeng.exe	31
PID 2912 wrote to memory of 2572	2912	taskeng.exe	31

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\f47144c7159be31d8116fdc36b66cb72c917cd91a4bbe9eaa55dec929c1cffdd.dll
1⤵
- Drops file in Windows directory
PID:2080

C:\Windows\system32\taskeng.exe
taskeng.exe {48AAEF50-B2AA-4311-AB92-A72B80ECB9D9} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:2912
- C:\Windows\system32\rundll32.exe
  C:\Windows\system32\rundll32.exe "C:\ProgramData\Ventuso LLC\Updater.dll",Start /u
  2⤵
  - Blocklisted process makes network request
  - Loads dropped DLL
  - Drops file in System32 directory
  - Modifies data under HKEY_USERS
  PID:2572

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\Ventuso LLC\Updater.dll

Filesize
129KB

MD5
80cd37d9eb33507bf054f32ce2380b09

SHA1
6e8d57dde537ace0639931569ae2b04b9cb99a26

SHA256
f47144c7159be31d8116fdc36b66cb72c917cd91a4bbe9eaa55dec929c1cffdd

SHA512
18f42496c4a66f11aa834e1db7f727ea7041882408a83be00f5ddacfbca439debe611f24eadd19e9453bc774d91d33d98ac25290791d501af2e706dc9ef89bde

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Analysis

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