7443d5335a207cca176825bd774a412e72882c815206c7f59ace1feb111bb4e9

General

Target
emoagain.xls
Size 113KB
Sample220111-pdrfasfef6
SHA256 7443d5335a207cca176825bd774a412e72882c815206c7f59ace1feb111bb4e9
MD5 20759385064298185538fe8560b6dd18
SHA1 50ca3dc590956809332b5b878c0ff213d81440a1
SHA512 b2fcb139dbdfc68b494c383645b0163b225bc68c0acfbf765e700b862eab27e71f35c892e622f46fbb16406edc512f5ef79e4ef5521b0ac5970ef26fe4ca92f2
MD5 SHA1 SHA512

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper
http://gaidov.bg/wp-includes/Ug/

Signatures

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

description	pid	pid_target	Process	procid_target
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2148	2672	rundll32.exe	68

Blocklisted process makes network request 1 IoCs

flow	pid	Process
40	864	rundll32.exe

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
2148	rundll32.exe
2152	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Qvqktqdrbwwitq\ulbxmm.qvf	rundll32.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2672	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
864	rundll32.exe
864	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2672	EXCEL.EXE
2672	EXCEL.EXE
2672	EXCEL.EXE
2672	EXCEL.EXE
2672	EXCEL.EXE
2672	EXCEL.EXE
2672	EXCEL.EXE
2672	EXCEL.EXE
2672	EXCEL.EXE
2672	EXCEL.EXE
2672	EXCEL.EXE
2672	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2672 wrote to memory of 2148	2672	EXCEL.EXE	70
PID 2672 wrote to memory of 2148	2672	EXCEL.EXE	70
PID 2672 wrote to memory of 2148	2672	EXCEL.EXE	70
PID 2148 wrote to memory of 2152	2148	rundll32.exe	71
PID 2148 wrote to memory of 2152	2148	rundll32.exe	71
PID 2148 wrote to memory of 2152	2148	rundll32.exe	71
PID 2152 wrote to memory of 3488	2152	rundll32.exe	73
PID 2152 wrote to memory of 3488	2152	rundll32.exe	73
PID 2152 wrote to memory of 3488	2152	rundll32.exe	73
PID 3488 wrote to memory of 864	3488	rundll32.exe	74
PID 3488 wrote to memory of 864	3488	rundll32.exe	74
PID 3488 wrote to memory of 864	3488	rundll32.exe	74

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\emoagain.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2672
- C:\Windows\SysWow64\rundll32.exe
  C:\Windows\SysWow64\rundll32.exe ..\sun.ocx,D"&"l"&"lR"&"egister"&"Serve"&"r
  2⤵
  - Process spawned unexpected child process
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:2148
- - C:\Windows\SysWOW64\rundll32.exe
    C:\Windows\SysWOW64\rundll32.exe "C:\Users\Admin\sun.ocx",DllRegisterServer
    3⤵
    - Loads dropped DLL
    - Drops file in System32 directory
    - Suspicious use of WriteProcessMemory
    PID:2152
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Qvqktqdrbwwitq\ulbxmm.qvf",ojDiuj
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3488
    - - C:\Windows\SysWOW64\rundll32.exe
        
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Qvqktqdrbwwitq\ulbxmm.qvf",DllRegisterServer
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        
        PID:864

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/2672-119-0x00007FFB428B0000-0x00007FFB428C0000-memory.dmp

Download

memory/2672-123-0x0000023AE70B0000-0x0000023AE70B2000-memory.dmp

Download

memory/2672-122-0x00007FFB428B0000-0x00007FFB428C0000-memory.dmp

Download

memory/2672-120-0x0000023AE70B0000-0x0000023AE70B2000-memory.dmp

Download

memory/2672-121-0x0000023AE70B0000-0x0000023AE70B2000-memory.dmp

Download

memory/2672-116-0x00007FFB428B0000-0x00007FFB428C0000-memory.dmp

Download

memory/2672-118-0x00007FFB428B0000-0x00007FFB428C0000-memory.dmp

Download

memory/2672-117-0x00007FFB428B0000-0x00007FFB428C0000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads