07f2fcc16c1a636612736e0e5f2f2c326681a197cc43d1de6aebe671cd2fc7da

Analysis

max time kernel
148s
max time network
150s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
04/08/2026, 11:15

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General

Target
2026-08-03_77e42f67b3020b71f984ddceb4b0e781_coinminer_elex_wannacry.exe
Size 591KB
Sample260804-nct95avsev
SHA256 07f2fcc16c1a636612736e0e5f2f2c326681a197cc43d1de6aebe671cd2fc7da
MD5 77e42f67b3020b71f984ddceb4b0e781
SHA1 85b7751838322ad59754dea4b08b7f6ed8b6fc70
SHA512 6f09e530562b54630380c14313ceea011d2ea3b5065c66c9e00e182a26954a836c07b72c68f2ac7ff724f7dfd05185e76a10ca3b5e09adc2a4e30159eb6a18a5
SSDEEP 6144:AhBqzw2w/0s/DbAgeonk7n7m8po+yUOKKNG0IxSjXKP+lAi:aqzw2wsEDbZ67fpLyUB/5qLlJ
TLSH
T173D4AD1372E4C855E1A22A72CC7263F0DEF5BED4D9358A1F5F843A4D2933E00A6157A7
MD5 SHA1 SHA512 SSDEEP TLSH

Score

9^/10

bootkit discovery execution persistence spyware stealer upx

Malware Config

Signatures

Detects executables containing base64 encoded User Agent 6 IoCs

resource	yara_rule
behavioral2/memory/2176-11-0x0000000010000000-0x0000000010052000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2176-10-0x0000000010000000-0x0000000010052000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2176-12-0x0000000010000000-0x0000000010052000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2176-14-0x0000000010000000-0x0000000010052000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2176-16-0x0000000010000000-0x0000000010052000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2176-19-0x0000000010000000-0x0000000010052000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4500-0-0x0000000000400000-0x000000000048B000-memory.dmp	UPX
behavioral2/memory/4500-2-0x0000000000400000-0x000000000048B000-memory.dmp	UPX
behavioral2/files/0x0007000000011394-3.dat	UPX
behavioral2/memory/1172-7-0x0000000000400000-0x000000000048B000-memory.dmp	UPX

Deletes itself 1 IoCs

pid	Process
1172	oxtjvdvvx.exe

Executes dropped EXE 2 IoCs

pid	Process
1172	oxtjvdvvx.exe
2176	eff.exe

Loads dropped DLL 1 IoCs

pid	Process
2176	eff.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

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\USER\S-1-5-21-3989226554-2204910950-1522900112-1000\Software\Microsoft\Windows\CurrentVersion\Run\dtfd = "c:\\Program Files\\fychnag\\eff.exe \"c:\\Program Files\\fychnag\\effzl.dll\",DoAddToFavDlg"	eff.exe

Enumerates connected drives 3 TTPs 23 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\q:	eff.exe
File opened (read-only)	\??\x:	eff.exe
File opened (read-only)	\??\h:	eff.exe
File opened (read-only)	\??\n:	eff.exe
File opened (read-only)	\??\r:	eff.exe
File opened (read-only)	\??\s:	eff.exe
File opened (read-only)	\??\u:	eff.exe
File opened (read-only)	\??\w:	eff.exe
File opened (read-only)	\??\g:	eff.exe
File opened (read-only)	\??\l:	eff.exe
File opened (read-only)	\??\o:	eff.exe
File opened (read-only)	\??\p:	eff.exe
File opened (read-only)	\??\t:	eff.exe
File opened (read-only)	\??\a:	eff.exe
File opened (read-only)	\??\b:	eff.exe
File opened (read-only)	\??\d:	eff.exe
File opened (read-only)	\??\j:	eff.exe
File opened (read-only)	\??\m:	eff.exe
File opened (read-only)	\??\v:	eff.exe
File opened (read-only)	\??\y:	eff.exe
File opened (read-only)	\??\z:	eff.exe
File opened (read-only)	\??\i:	eff.exe
File opened (read-only)	\??\k:	eff.exe

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PHYSICALDRIVE0	eff.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4500-0-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/4500-2-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/files/0x0007000000011394-3.dat	upx
behavioral2/memory/1172-7-0x0000000000400000-0x000000000048B000-memory.dmp	upx

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\fychnag	oxtjvdvvx.exe
File created	\??\c:\Program Files\fychnag\effzl.dll	oxtjvdvvx.exe
File created	\??\c:\Program Files\fychnag\eff.exe	oxtjvdvvx.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
5192	cmd.exe

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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	oxtjvdvvx.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	eff.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-03_77e42f67b3020b71f984ddceb4b0e781_coinminer_elex_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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
5192	cmd.exe
1272	PING.EXE

Checks processor information in registry 2 TTPs 2 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	eff.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	eff.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1272	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2176	eff.exe
2176	eff.exe
2176	eff.exe
2176	eff.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2176	eff.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4500	2026-08-03_77e42f67b3020b71f984ddceb4b0e781_coinminer_elex_wannacry.exe
1172	oxtjvdvvx.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4500 wrote to memory of 5192	4500	2026-08-03_77e42f67b3020b71f984ddceb4b0e781_coinminer_elex_wannacry.exe	89
PID 5192 wrote to memory of 1272	5192	cmd.exe	91
PID 5192 wrote to memory of 1172	5192	cmd.exe	92
PID 1172 wrote to memory of 2176	1172	oxtjvdvvx.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-03_77e42f67b3020b71f984ddceb4b0e781_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-03_77e42f67b3020b71f984ddceb4b0e781_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4500
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\oxtjvdvvx.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-03_77e42f67b3020b71f984ddceb4b0e781_coinminer_elex_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:5192
- - 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:1272
- - C:\Users\Admin\AppData\Local\Temp\oxtjvdvvx.exe
    C:\Users\Admin\AppData\Local\Temp\\oxtjvdvvx.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-03_77e42f67b3020b71f984ddceb4b0e781_coinminer_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - Drops file in Program Files directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1172
  - - \??\c:\Program Files\fychnag\eff.exe
      "c:\Program Files\fychnag\eff.exe" "c:\Program Files\fychnag\effzl.dll",DoAddToFavDlg C:\Users\Admin\AppData\Local\Temp\oxtjvdvvx.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Adds Run key to start application
      Enumerates connected drives
      Writes to the Master Boot Record (MBR)
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2176

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k GPSvcGroup
1⤵
PID:5752

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Windows Command Shell

T1059.003

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

eff.exe

Path C:\Program Files\fychnag\eff.exe
Size 51KB
SHA256 ce6bb7eddc83762c708d4a41709ae00371dbdc09b2a380f28fa60b1edf917473
MD5 2e068ce2770fde8d1af4cb114b98df1f
SHA1 b6f9c2775babb025b22f915c3047aa627d07c312
SHA512 998d695eb56375e63df7db16740b89deb2cf630ccbead8bcf84a921ec6f4a4f9aef2755b703f7190f332b2008ebcc949363bcf8f392d7d07246c255b5073ed35
SSDEEP 1536:6G9yoVEpHP29I3fbcJboSUge5N+CnC/maz9Rh:8pv2mbcJboce58wvOR
TLSH
T137336C236A0A49B3DFE231780A9D7232526DD862075541F7A61057EAFD243E2EE743CF
MD5 SHA1 SHA512 SSDEEP TLSH

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oxtjvdvvx.exe

Path C:\Users\Admin\AppData\Local\Temp\oxtjvdvvx.exe
Size 591KB
SHA256 818a238995369a4ff81d51cf6bf6678bb1310f15c7c9e95623098e568dd04759
MD5 79dc7325f7c335ca4b52c5d8f04354e7
SHA1 bd92ede44e591556176e63d50451baae339e3ee3
SHA512 8f036ea104352009c8e893eb718ad258ca22de11f25d5079df14382e5d20fbc33f5db59f0268fbce812a089f5edcea32198c1776ae43d9bc6249af5abf78466b
SSDEEP 6144:AhBqzw2w/0s/DbAgeonk7n7m8po+yUOKKNG0IxSjXKP+lArn:aqzw2wsEDbZ67fpLyUB/5qLlcn
TLSH
T15DD4AD1372E4C855E1A22A72CC7663F0DEF5BEE4D9358A1F5F803A4D2933E00A6157A7
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

effzl.dll

Path \??\c:\Program Files\fychnag\effzl.dll
Size 171KB
SHA256 8c58259ae85712b7def00914182f0d2166dadd90bdd86c5893c7b32ec7fd2982
MD5 eb0f4a5d733d8cc515e24b5d1da7c0f2
SHA1 36050e806530a421cac0819e5934a07050ac3df3
SHA512 2657d360e871f119b7468055f78da10b9d7f2fc54941c791d7c3beb4cb4f39d807152a1f20383b74ca1ffbabf1f1674aaeace241bf661957ab6857804a7e1e5b
SSDEEP 3072:R2Iz9CI8mUOtDDPwLkBLXLDFkKmvzXBpLHYmmO1QezRd7UcPa1xMjM7I:Rjz9X8mXGUXVPmr9mOzRd7UcPKoM8
TLSH
T1930412B0F3F98B59F0A716770831597CC97638826329277FC2885A6EAC5442FF18D764
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1172-7-0x0000000000400000-0x000000000048B000-memory.dmp

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memory/2176-11-0x0000000010000000-0x0000000010052000-memory.dmp

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memory/2176-10-0x0000000010000000-0x0000000010052000-memory.dmp

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memory/2176-13-0x0000000002E50000-0x0000000002E52000-memory.dmp

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memory/2176-12-0x0000000010000000-0x0000000010052000-memory.dmp

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memory/2176-14-0x0000000010000000-0x0000000010052000-memory.dmp

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memory/2176-16-0x0000000010000000-0x0000000010052000-memory.dmp

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memory/2176-19-0x0000000010000000-0x0000000010052000-memory.dmp

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memory/4500-2-0x0000000000400000-0x000000000048B000-memory.dmp

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memory/4500-0-0x0000000000400000-0x000000000048B000-memory.dmp

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