bf68a992b67f10fdba02cd054fcc8135d26650eb00d1c385e48f625011001707

Analysis

max time kernel
188s
max time network
172s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
04-12-2022 07:40

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General

Target

bf68a992b67f10fdba02cd054fcc8135d26650eb00d1c385e48f625011001707.dll
Size

36KB
MD5

1a87d9bd0e8e2200892ff411fbf9232f
SHA1

390e974a1eed658e9c54ede0ae2d7f49a31070f0
SHA256

bf68a992b67f10fdba02cd054fcc8135d26650eb00d1c385e48f625011001707
SHA512

d29eb4e55692974e5e56b7e8ac92274872eb322e288a4ac4391988faea383fcc29abd23a13b1501eb1b9820631ff1af019b8ae847dc8699a58d040f1a254f9b3
SSDEEP

768:zqZV48tFO5X1hCJypualTB4sho1Dv8l5PHbgs0mXAEE:z8zYhC4994sCNv8Pv8spZE

Score

8^/10

persistence upx

Malware Config

Signatures

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4424-135-0x0000000010000000-0x0000000010027000-memory.dmp	upx
behavioral2/memory/4424-141-0x0000000010000000-0x0000000010027000-memory.dmp	upx
behavioral2/memory/4424-143-0x0000000002510000-0x0000000002537000-memory.dmp	upx
behavioral2/memory/2796-149-0x0000000010000000-0x0000000010027000-memory.dmp	upx

Loads dropped DLL 3 IoCs

pid	Process
4424	rundll32.exe
4424	rundll32.exe
2796	rundll32.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

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

Drops file in System32 directory 2 IoCs

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

Modifies registry class 4 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{05E1E6DE-CBC4-4F00-B4ED-FF618BF1BE2B}\InprocServer32\ThreadingModel = "Both"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{05E1E6DE-CBC4-4F00-B4ED-FF618BF1BE2B}	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{05E1E6DE-CBC4-4F00-B4ED-FF618BF1BE2B}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{05E1E6DE-CBC4-4F00-B4ED-FF618BF1BE2B}\InprocServer32\ = "C:\\Windows\\SysWow64\\ljJBUOiI.dll"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4424	rundll32.exe
4424	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
4424	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4424	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4424	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 372 wrote to memory of 4424	372	rundll32.exe	82
PID 372 wrote to memory of 4424	372	rundll32.exe	82
PID 372 wrote to memory of 4424	372	rundll32.exe	82
PID 4424 wrote to memory of 576	4424	rundll32.exe	5
PID 4424 wrote to memory of 2796	4424	rundll32.exe	83
PID 4424 wrote to memory of 2796	4424	rundll32.exe	83
PID 4424 wrote to memory of 2796	4424	rundll32.exe	83

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:576

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\bf68a992b67f10fdba02cd054fcc8135d26650eb00d1c385e48f625011001707.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:372
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\bf68a992b67f10fdba02cd054fcc8135d26650eb00d1c385e48f625011001707.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:4424
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Windows\system32\ljJBUOiI.dll,a
    3⤵
    - Loads dropped DLL
    - Adds Run key to start application
    - Modifies registry class
    - Suspicious behavior: EnumeratesProcesses
    PID:2796

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

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\ljJBUOiI.dll

Filesize
36KB

MD5
1a87d9bd0e8e2200892ff411fbf9232f

SHA1
390e974a1eed658e9c54ede0ae2d7f49a31070f0

SHA256
bf68a992b67f10fdba02cd054fcc8135d26650eb00d1c385e48f625011001707

SHA512
d29eb4e55692974e5e56b7e8ac92274872eb322e288a4ac4391988faea383fcc29abd23a13b1501eb1b9820631ff1af019b8ae847dc8699a58d040f1a254f9b3

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

Filesize
36KB

MD5
1a87d9bd0e8e2200892ff411fbf9232f

SHA1
390e974a1eed658e9c54ede0ae2d7f49a31070f0

SHA256
bf68a992b67f10fdba02cd054fcc8135d26650eb00d1c385e48f625011001707

SHA512
d29eb4e55692974e5e56b7e8ac92274872eb322e288a4ac4391988faea383fcc29abd23a13b1501eb1b9820631ff1af019b8ae847dc8699a58d040f1a254f9b3

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

Filesize
36KB

MD5
1a87d9bd0e8e2200892ff411fbf9232f

SHA1
390e974a1eed658e9c54ede0ae2d7f49a31070f0

SHA256
bf68a992b67f10fdba02cd054fcc8135d26650eb00d1c385e48f625011001707

SHA512
d29eb4e55692974e5e56b7e8ac92274872eb322e288a4ac4391988faea383fcc29abd23a13b1501eb1b9820631ff1af019b8ae847dc8699a58d040f1a254f9b3

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

Filesize
36KB

MD5
1a87d9bd0e8e2200892ff411fbf9232f

SHA1
390e974a1eed658e9c54ede0ae2d7f49a31070f0

SHA256
bf68a992b67f10fdba02cd054fcc8135d26650eb00d1c385e48f625011001707

SHA512
d29eb4e55692974e5e56b7e8ac92274872eb322e288a4ac4391988faea383fcc29abd23a13b1501eb1b9820631ff1af019b8ae847dc8699a58d040f1a254f9b3

Download Submit
memory/2796-144-0x0000000000000000-mapping.dmp

Download
memory/2796-149-0x0000000010000000-0x0000000010027000-memory.dmp

Filesize
156KB

Download
memory/4424-138-0x0000000002511000-0x0000000002513000-memory.dmp

Filesize
8KB

Download
memory/4424-135-0x0000000010000000-0x0000000010027000-memory.dmp

Filesize
156KB

Download
memory/4424-139-0x0000000002510000-0x0000000002537000-memory.dmp

Filesize
156KB

Download
memory/4424-140-0x0000000002510000-0x0000000002537000-memory.dmp

Filesize
156KB

Download
memory/4424-141-0x0000000010000000-0x0000000010027000-memory.dmp

Filesize
156KB

Download
memory/4424-142-0x0000000002510000-0x0000000002537000-memory.dmp

Filesize
156KB

Download
memory/4424-143-0x0000000002510000-0x0000000002537000-memory.dmp

Filesize
156KB

Download
memory/4424-132-0x0000000000000000-mapping.dmp

Download
memory/4424-134-0x0000000010000000-0x0000000010027000-memory.dmp

Filesize
156KB

Download
memory/4424-133-0x0000000010000000-0x0000000010027000-memory.dmp

Filesize
156KB

Download