warmcookie | 371cf9bcf9a3d7b11d5ac386bef9450beac8c66a546fea1ca9cf629cdb751825

General

Target

Run-Malware-1.bat
Size

88B
MD5

2ee06c41fd75f8fabd7453d3e1240a49
SHA1

02b77c02c6c55b6f40ffc409860c66fda803f39f
SHA256

68082405a1e0bdf0a6109a0a22f93677bb25b2aba804c77f2536a8090cf1e0d0
SHA512

354f4fb40ce5248a68ae8a6dfdabe9476970841de22b875788f8b8ec12b529bd702d18ca9f3a1e13412c68f67a3d7326b2c37fdfa5b63ceffbb3ea85682c204c

Score

10^/10

warmcookie backdoor discovery

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 6 IoCs

flow	pid	Process
4	2552	rundll32.exe
5	2552	rundll32.exe
6	2552	rundll32.exe
7	2552	rundll32.exe
8	2552	rundll32.exe
9	2552	rundll32.exe

Loads dropped DLL 4 IoCs

pid	Process
2552	rundll32.exe
2552	rundll32.exe
2552	rundll32.exe
2552	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\SiteRocket Labs.job	rundll32.exe

Modifies data under HKEY_USERS 18 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{B412674D-8DA8-4B13-B5AC-825AC66C573C}\WpadDecisionReason = "1"	rundll32.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\e2-60-d2-5f-32-fd\WpadDecision = "0"	rundll32.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0"	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 = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f008f000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	rundll32.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{B412674D-8DA8-4B13-B5AC-825AC66C573C}\WpadDecisionTime = d0975946a9f4da01	rundll32.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{B412674D-8DA8-4B13-B5AC-825AC66C573C}\WpadNetworkName = "Network 3"	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\{B412674D-8DA8-4B13-B5AC-825AC66C573C}\e2-60-d2-5f-32-fd	rundll32.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\e2-60-d2-5f-32-fd\WpadDecisionReason = "1"	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\{B412674D-8DA8-4B13-B5AC-825AC66C573C}	rundll32.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{B412674D-8DA8-4B13-B5AC-825AC66C573C}\WpadDecision = "0"	rundll32.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\e2-60-d2-5f-32-fd	rundll32.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\e2-60-d2-5f-32-fd\WpadDecisionTime = d0975946a9f4da01	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\Connections	rundll32.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2728 wrote to memory of 2644	2728	cmd.exe	31
PID 2728 wrote to memory of 2644	2728	cmd.exe	31
PID 2728 wrote to memory of 2644	2728	cmd.exe	31
PID 2720 wrote to memory of 2552	2720	taskeng.exe	34
PID 2720 wrote to memory of 2552	2720	taskeng.exe	34
PID 2720 wrote to memory of 2552	2720	taskeng.exe	34

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\Run-Malware-1.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:2728
- C:\Windows\system32\rundll32.exe
  rundll32.exe f4d2c9470b322af29b9188a3a590cbe85bacb9cc8fcd7c2e94d82271ded3f659.dll, Start
  2⤵
  - Drops file in Windows directory
  PID:2644

C:\Windows\system32\taskeng.exe
taskeng.exe {684641A6-995C-4EDC-8E9F-B26395CBAEAA} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:2720
- C:\Windows\system32\rundll32.exe
  C:\Windows\system32\rundll32.exe "C:\ProgramData\SiteRocket Labs\Updater.dll",Start /u
  2⤵
  - Blocklisted process makes network request
  - Loads dropped DLL
  - Drops file in System32 directory
  - Modifies data under HKEY_USERS
  PID:2552

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

Replay Monitor

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Downloads

C:\ProgramData\SiteRocket Labs\Updater.dll

Filesize
155KB

MD5
7a799f4f9aa63745a75b901a392aff29

SHA1
b9983463f637191ba12c2270ac52a547676a7037

SHA256
f4d2c9470b322af29b9188a3a590cbe85bacb9cc8fcd7c2e94d82271ded3f659

SHA512
e9eeb340dd620256d543ab43d08ccc23b555afa332c744c629fd8f40760f20a24e234955fc8d2e78a150f09028ca7a11650e0da157fff64833f13ce89a208c23

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Analysis

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