edfb4dbba9dfcc35942031468815f604d0a04ded79b0872f14aff6f51faed43e

General

Target

3c8f6d0c77309ecced7ae3efd472eb4a.dll
Size

33KB
MD5

3c8f6d0c77309ecced7ae3efd472eb4a
SHA1

32d589ad80fd6a6c850d82101a48064309f122bc
SHA256

edfb4dbba9dfcc35942031468815f604d0a04ded79b0872f14aff6f51faed43e
SHA512

e0c9ee36f7d894c3100a137400d7e5d43dde7907714994981828c849a8438164499da81770bd41f93c967a664aee4b33011ea386cd36295d558f696efdbf64ec
SSDEEP

768:EReSZXXIvhzkZW4dyJ56ShX895UAJZNvxwA9vuJ:ERD4v2dyJ5lsUAJZNvx19vi

Score

7^/10

Malware Config

Signatures

Loads dropped DLL 3 IoCs

pid	Process
1976	rundll32.exe
1976	rundll32.exe
3652	rundll32.exe

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/1976-4-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/1976-13-0x00000000009D0000-0x00000000009E4000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\MSServer = "rundll32.exe C:\\Windows\\system32\\fcccbcaB.dll,#1"	rundll32.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\fcccbcaB.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\fcccbcaB.dll	rundll32.exe

Modifies registry class 4 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{31CDFCB9-37D6-4C1D-A31D-AA2DD56F637B}	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{31CDFCB9-37D6-4C1D-A31D-AA2DD56F637B}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{31CDFCB9-37D6-4C1D-A31D-AA2DD56F637B}\InprocServer32\ = "C:\\Windows\\SysWow64\\fcccbcaB.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{31CDFCB9-37D6-4C1D-A31D-AA2DD56F637B}\InprocServer32\ThreadingModel = "Both"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 34 IoCs

pid	Process
1976	rundll32.exe
1976	rundll32.exe
3652	rundll32.exe
3652	rundll32.exe
3652	rundll32.exe
3652	rundll32.exe
3652	rundll32.exe
3652	rundll32.exe
3652	rundll32.exe
3652	rundll32.exe
3652	rundll32.exe
3652	rundll32.exe
3652	rundll32.exe
3652	rundll32.exe
3652	rundll32.exe
3652	rundll32.exe
3652	rundll32.exe
3652	rundll32.exe
3652	rundll32.exe
3652	rundll32.exe
3652	rundll32.exe
3652	rundll32.exe
3652	rundll32.exe
3652	rundll32.exe
3652	rundll32.exe
3652	rundll32.exe
3652	rundll32.exe
3652	rundll32.exe
3652	rundll32.exe
3652	rundll32.exe
3652	rundll32.exe
3652	rundll32.exe
3652	rundll32.exe
3652	rundll32.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
1976	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1976	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1976	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2412 wrote to memory of 1976	2412	rundll32.exe	14
PID 2412 wrote to memory of 1976	2412	rundll32.exe	14
PID 2412 wrote to memory of 1976	2412	rundll32.exe	14
PID 1976 wrote to memory of 616	1976	rundll32.exe	3
PID 1976 wrote to memory of 3652	1976	rundll32.exe	102
PID 1976 wrote to memory of 3652	1976	rundll32.exe	102
PID 1976 wrote to memory of 3652	1976	rundll32.exe	102

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:616

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\3c8f6d0c77309ecced7ae3efd472eb4a.dll,#1
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: RenamesItself
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1976
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Windows\system32\fcccbcaB.dll,a
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  PID:3652

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\3c8f6d0c77309ecced7ae3efd472eb4a.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2412

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\SysWOW64\fcccbcaB.dll

Filesize
33KB

MD5
3c8f6d0c77309ecced7ae3efd472eb4a

SHA1
32d589ad80fd6a6c850d82101a48064309f122bc

SHA256
edfb4dbba9dfcc35942031468815f604d0a04ded79b0872f14aff6f51faed43e

SHA512
e0c9ee36f7d894c3100a137400d7e5d43dde7907714994981828c849a8438164499da81770bd41f93c967a664aee4b33011ea386cd36295d558f696efdbf64ec

Download Submit
C:\Windows\SysWOW64\fcccbcaB.dll

Filesize
1KB

MD5
1c883f7d24ab11e1508acbc85a464950

SHA1
297080af9696b00b0d8bdb6958110ef53d4e8643

SHA256
86f01c2164fc3c46081fa6be865417afee592a31343018f4dfb0fb8c97e542d3

SHA512
737cc33ceba82543646642b7bfba138420166d7ce55f8c354e503f7e8a15829ff428dc0eafb5649213721b81633fbda67eff06c070b23966c73bb260ca6511b2

Download Submit
memory/1976-2-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/1976-3-0x0000000000890000-0x0000000000896000-memory.dmp

Filesize
24KB

Download
memory/1976-0-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/1976-4-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/1976-13-0x00000000009D0000-0x00000000009E4000-memory.dmp

Filesize
80KB

Download
memory/3652-23-0x0000000000CB0000-0x0000000000CB1000-memory.dmp

Filesize
4KB

Download
memory/3652-22-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/3652-24-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads