e573db1b6d50b79193668c6a012c156de39564f063d4cce1cd8916cd344ac606

Analysis

max time kernel
150s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
11/07/2024, 20:25

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General

Target

3a98f311c9fddf5d66b1b2b034081737_JaffaCakes118.dll
Size

35KB
MD5

3a98f311c9fddf5d66b1b2b034081737
SHA1

ab35e31d75f9a890bf75f764fbbcd2db2b92055c
SHA256

e573db1b6d50b79193668c6a012c156de39564f063d4cce1cd8916cd344ac606
SHA512

84ebc88035bdbb93507c8950a0697ed724bb8545d46aadee6e973c8b46e894505e3428a8d9ef577c0b11cfd6711b0f6a4a5eeb7185d2b8d441baa17e4b7f6d29
SSDEEP

768:qgGMRHLcq3zpYDqgDuIhvrghslpAZ5pvKnzKOa:qg/H3zpYDq0uIhcObAZrvKGb

Score

7^/10

persistence upx

Malware Config

Signatures

Loads dropped DLL 3 IoCs

pid	Process
4380	rundll32.exe
4380	rundll32.exe
1276	rundll32.exe

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4380-1-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/4380-0-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/4380-2-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/4380-5-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/4380-14-0x00000000031B0000-0x00000000031C4000-memory.dmp	upx
behavioral2/memory/1276-24-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/1276-25-0x0000000010000000-0x0000000010014000-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\\opnmLbCv.dll,#1"	rundll32.exe

Drops file in System32 directory 2 IoCs

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

Modifies registry class 4 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{A7A4DFC1-32C7-4A3C-BFAC-21B526A00347}	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{A7A4DFC1-32C7-4A3C-BFAC-21B526A00347}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{A7A4DFC1-32C7-4A3C-BFAC-21B526A00347}\InprocServer32\ = "C:\\Windows\\SysWow64\\opnmLbCv.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{A7A4DFC1-32C7-4A3C-BFAC-21B526A00347}\InprocServer32\ThreadingModel = "Both"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4380	rundll32.exe
4380	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe
1276	rundll32.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
4380	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4380	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4380	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 4572 wrote to memory of 4380	4572	rundll32.exe	83
PID 4572 wrote to memory of 4380	4572	rundll32.exe	83
PID 4572 wrote to memory of 4380	4572	rundll32.exe	83
PID 4380 wrote to memory of 620	4380	rundll32.exe	5
PID 4380 wrote to memory of 1276	4380	rundll32.exe	89
PID 4380 wrote to memory of 1276	4380	rundll32.exe	89
PID 4380 wrote to memory of 1276	4380	rundll32.exe	89

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:620

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\3a98f311c9fddf5d66b1b2b034081737_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4572
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\3a98f311c9fddf5d66b1b2b034081737_JaffaCakes118.dll,#1
  2⤵
  - 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:4380
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Windows\system32\opnmLbCv.dll,a
    3⤵
    - Loads dropped DLL
    - Adds Run key to start application
    - Modifies registry class
    - Suspicious behavior: EnumeratesProcesses
    PID:1276

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\SysWOW64\opnmLbCv.dll

Filesize
35KB

MD5
3a98f311c9fddf5d66b1b2b034081737

SHA1
ab35e31d75f9a890bf75f764fbbcd2db2b92055c

SHA256
e573db1b6d50b79193668c6a012c156de39564f063d4cce1cd8916cd344ac606

SHA512
84ebc88035bdbb93507c8950a0697ed724bb8545d46aadee6e973c8b46e894505e3428a8d9ef577c0b11cfd6711b0f6a4a5eeb7185d2b8d441baa17e4b7f6d29

Download Submit
memory/1276-21-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/1276-24-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/1276-25-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/4380-1-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/4380-0-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/4380-2-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/4380-3-0x0000000001340000-0x0000000001347000-memory.dmp

Filesize
28KB

Download
memory/4380-5-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/4380-4-0x000000001000E000-0x0000000010013000-memory.dmp

Filesize
20KB

Download
memory/4380-14-0x00000000031B0000-0x00000000031C4000-memory.dmp

Filesize
80KB

Download