7fd7c7dd38f3526efda5fe6c04714258cb2255fdaa57f2de89d55e0a1c6d618b

General

Target
2026-08-22_b27c44667407dff268c75223233ad862_elex_feodo_wannacry.exe
Size 95KB
Sample260823-cprtzssakh
SHA256 7fd7c7dd38f3526efda5fe6c04714258cb2255fdaa57f2de89d55e0a1c6d618b
MD5 b27c44667407dff268c75223233ad862
SHA1 7b757a8dd5e1ad45b144e46cd255a2555ad3be3a
SHA512 766523f1da3d4c1fa4dff763032f9fe2bcacc6998982c70e032166d62a5aab1b51061d0515e3535499b859a18d557c6671e20c69f3e2d22f8810d164314132a4
SSDEEP 1536:VSSABNx6vb4RoI47zzzzzzzzzvfxzVzNrzzzgzzzzzzzzzzzzzzzz6zzzdzzzzlK:QSABNx6vb4RoI4pyjHYLhal01UoPXG
TLSH
T1F393AE0BABAA08D9E220AD70152D377597FF946E3B149B978349FD4D9433CC1EC3614A
MD5 SHA1 SHA512 SSDEEP TLSH

Score

7^/10

Malware Config

Signatures

Deletes itself 1 IoCs

pid	Process
4608	walro.exe

Executes dropped EXE 1 IoCs

pid	Process
4608	walro.exe

Loads dropped DLL 1 IoCs

pid	Process
5632	rundll32.exe

Executes a command shell one-liner 1 TTPs 1 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
2256	cmd.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
6008	5632	WerFault.exe	93

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-22_b27c44667407dff268c75223233ad862_elex_feodo_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	walro.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
2256	cmd.exe
4644	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4644	PING.EXE

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4384	2026-08-22_b27c44667407dff268c75223233ad862_elex_feodo_wannacry.exe
4608	walro.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4384 wrote to memory of 2256	4384	2026-08-22_b27c44667407dff268c75223233ad862_elex_feodo_wannacry.exe	89
PID 2256 wrote to memory of 4644	2256	cmd.exe	91
PID 2256 wrote to memory of 4608	2256	cmd.exe	92
PID 4608 wrote to memory of 5632	4608	walro.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-22_b27c44667407dff268c75223233ad862_elex_feodo_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-22_b27c44667407dff268c75223233ad862_elex_feodo_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4384
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\walro.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-22_b27c44667407dff268c75223233ad862_elex_feodo_wannacry.exe"
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2256
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 2
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:4644
- - \??\c:\walro.exe
    c:\walro.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-22_b27c44667407dff268c75223233ad862_elex_feodo_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4608
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\qqwqlmbw\iumdv.dll",DoVirusScan c:\walro.exe
      4⤵
      Loads dropped DLL
      System Location Discovery: System Language Discovery
      PID:5632
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 5632 -s 476
        5⤵
        Program crash
        
        PID:6008

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 5632 -ip 5632
1⤵
PID:4728

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Remote System Discovery

1

T1018

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

iumdv.dll

Path \??\c:\qqwqlmbw\iumdv.dll
Size 50KB
SHA256 7604a0d3e695ff2f47b2961a860aa77e41952df48c132c18ac8d84e6ed3ee8eb
MD5 18cc91cc0c4c41e39a2c5310e760f0ef
SHA1 aaacc94db8d8a37e5d34878aa259d3274a5ff2a7
SHA512 8abba5220a7216288d0d2c683a5d01b796b1179464a2432eda991004348223c822c54ab39fd19302ff01974ec8d026e98280e9f1bdb67178126d75a974ecc7e7
SSDEEP 768:Z+arYIR3u5v4bGwCl56LNQQe5JBtGf1oTYtx/qQvo9:ZPrG57TzDxJS6Etx/ZvO
TLSH
T1AB33E178E1F4B8F6E46EAB345D82146DB1C16BD34D3080BA079224AF6C37E578B52731
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

walro.exe

Path \??\c:\walro.exe
Size 95KB
SHA256 d91e5f7ff494776877db23a0d39bc20440222732659fd93dde6718e5402b5793
MD5 6dab208ac7c413385bb5e96bc8f98b73
SHA1 a5d2832993cb306704ebd070393baf558c04d667
SHA512 efe2a86a42c0101cea02f46e344d1b08ca5e07c2a2e9a402174bf063f44e02545bfc3f4ab342679d3338d0d31c5977dbf21214144f916ef19df12a74419dfdab
SSDEEP 1536:VSSABNx6vb4RoI47zzzzzzzzzvfxzVzNrzzzgzzzzzzzzzzzzzzzz6zzzdzzzzl7:QSABNx6vb4RoI4pyjHYLhal01UoPX/
TLSH
T1AF93AE0BABAA08D9E220AD70152D377597EF946E3B149B978349FE4D9433CC1EC3614A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4384-0-0x0000000000400000-0x0000000000417000-memory.dmp

Download

memory/4384-2-0x0000000000400000-0x0000000000417000-memory.dmp

Download

memory/4608-6-0x0000000000400000-0x0000000000417000-memory.dmp

Download

memory/5632-9-0x0000000010000000-0x0000000010032000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads