f8a03ac431ceecc76e1f3af12ea948c3da3c057b5f0449f0474d5bb02933c58f

General

Target

2c62ee8a2a75daa0e436c91a1a479155.exe
Size

52KB
MD5

2c62ee8a2a75daa0e436c91a1a479155
SHA1

2ab886b656fbf2750685fa225471865ecd21c9e2
SHA256

f8a03ac431ceecc76e1f3af12ea948c3da3c057b5f0449f0474d5bb02933c58f
SHA512

e2fb3f25b565792d7d8dff123e91e6fd28c09a86f678508855a21375043b373eca3cb6d1f2571f025f80ef18cd5a69076e3e67ef355421cdc8a7fd396dea16a7
SSDEEP

768:RUEMjlLXFqG2q6DXjCGNL3fn2pCrllkUz6pwN75yTJUlTdKcrKJU3mLY8:RslLVF6DXjCGBf0CrllFm+N7CCscrjkp

Score

7^/10

Malware Config

Signatures

Loads dropped DLL 2 IoCs

pid	Process
1920	2c62ee8a2a75daa0e436c91a1a479155.exe
4424	rundll32.exe

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1920-1-0x0000000000400000-0x0000000000417000-memory.dmp	upx
behavioral2/memory/1920-4-0x0000000000400000-0x0000000000417000-memory.dmp	upx
behavioral2/memory/1920-2-0x0000000000400000-0x0000000000417000-memory.dmp	upx
behavioral2/memory/1920-14-0x0000000010000000-0x000000001001B000-memory.dmp	upx
behavioral2/memory/1920-12-0x0000000010000000-0x000000001001B000-memory.dmp	upx
behavioral2/memory/1920-11-0x0000000010000000-0x000000001001B000-memory.dmp	upx
behavioral2/memory/1920-10-0x0000000010000000-0x000000001001B000-memory.dmp	upx
behavioral2/memory/4424-24-0x0000000010000000-0x000000001001B000-memory.dmp	upx
behavioral2/memory/4424-30-0x0000000010000000-0x000000001001B000-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\\efcAQGAR.dll,#1"	rundll32.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\efcAQGAR.dll	2c62ee8a2a75daa0e436c91a1a479155.exe
File created	C:\Windows\SysWOW64\efcAQGAR.dll	2c62ee8a2a75daa0e436c91a1a479155.exe

Modifies registry class 4 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{6D794CB4-C7CD-4c6f-BFDC-9B77AFBDC02C}	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{6D794CB4-C7CD-4c6f-BFDC-9B77AFBDC02C}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{6D794CB4-C7CD-4c6f-BFDC-9B77AFBDC02C}\InprocServer32\ = "C:\\Windows\\SysWow64\\efcAQGAR.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{6D794CB4-C7CD-4c6f-BFDC-9B77AFBDC02C}\InprocServer32\ThreadingModel = "Both"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1920	2c62ee8a2a75daa0e436c91a1a479155.exe
1920	2c62ee8a2a75daa0e436c91a1a479155.exe
4424	rundll32.exe
4424	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1920	2c62ee8a2a75daa0e436c91a1a479155.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1920	2c62ee8a2a75daa0e436c91a1a479155.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1920 wrote to memory of 612	1920	2c62ee8a2a75daa0e436c91a1a479155.exe	4
PID 1920 wrote to memory of 4424	1920	2c62ee8a2a75daa0e436c91a1a479155.exe	100
PID 1920 wrote to memory of 4424	1920	2c62ee8a2a75daa0e436c91a1a479155.exe	100
PID 1920 wrote to memory of 4424	1920	2c62ee8a2a75daa0e436c91a1a479155.exe	100
PID 1920 wrote to memory of 2552	1920	2c62ee8a2a75daa0e436c91a1a479155.exe	102
PID 1920 wrote to memory of 2552	1920	2c62ee8a2a75daa0e436c91a1a479155.exe	102
PID 1920 wrote to memory of 2552	1920	2c62ee8a2a75daa0e436c91a1a479155.exe	102

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:612

C:\Users\Admin\AppData\Local\Temp\2c62ee8a2a75daa0e436c91a1a479155.exe
"C:\Users\Admin\AppData\Local\Temp\2c62ee8a2a75daa0e436c91a1a479155.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1920
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Windows\system32\efcAQGAR.dll,a
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  PID:4424
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\nnnmjihh.bat "C:\Users\Admin\AppData\Local\Temp\2c62ee8a2a75daa0e436c91a1a479155.exe"
  2⤵
  PID:2552

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

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Downloads

memory/1920-0-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1920-1-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1920-4-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1920-3-0x00000000006C0000-0x00000000006CB000-memory.dmp

Filesize
44KB

Download
memory/1920-2-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1920-14-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1920-13-0x0000000000750000-0x0000000000757000-memory.dmp

Filesize
28KB

Download
memory/1920-12-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1920-11-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1920-10-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/4424-25-0x0000000000C90000-0x0000000000C91000-memory.dmp

Filesize
4KB

Download
memory/4424-24-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/4424-30-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/4424-32-0x0000000000C90000-0x0000000000C91000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads