f53982a4b61c992b33fc08a6a3749a624405748630af61371e675f499df60b5d

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
07/08/2026, 04:21

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General

Target
2026-08-07_809f0194cddad1b9d29be537a8d7189f_coinminer_elex_wannacry.exe
Size 592KB
Sample260807-eyp3vsfq41
SHA256 f53982a4b61c992b33fc08a6a3749a624405748630af61371e675f499df60b5d
MD5 809f0194cddad1b9d29be537a8d7189f
SHA1 f79c898ae86976fde986974e8e06b2e465a14337
SHA512 042a6a4e7b302c00449c687cbad7485a3e5f2ad608759c1dca00df218fc60a71212ebdd21766e10d4e8ae99b62606b83621577b444c2dfe16566cc71c13a74e5
SSDEEP 6144:AhBqzw2w/0s/DbAgeonk7n7m8po+yUOKKNG0IxSjXKP+lAz8:aqzw2wsEDbZ67fpLyUB/5qLlH
TLSH
T184D4AD13B2E48865E1A22A72CC7667F0DEF5BED4D935861F5F803A0D2933E00A6157A7
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 5 IoCs

resource	yara_rule
behavioral1/memory/2588-17-0x0000000010000000-0x0000000010052000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/2588-16-0x0000000010000000-0x0000000010052000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/2588-18-0x0000000010000000-0x0000000010052000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/2588-21-0x0000000010000000-0x0000000010052000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/2588-23-0x0000000010000000-0x0000000010052000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral1/memory/2940-0-0x0000000000400000-0x000000000048B000-memory.dmp	UPX
behavioral1/memory/2940-2-0x0000000000400000-0x000000000048B000-memory.dmp	UPX
behavioral1/files/0x000c0000000242e6-4.dat	UPX
behavioral1/memory/828-11-0x0000000000400000-0x000000000048B000-memory.dmp	UPX

Deletes itself 1 IoCs

pid	Process
828	gmjri.exe

Executes dropped EXE 2 IoCs

pid	Process
828	gmjri.exe
2588	fet.exe

Loads dropped DLL 1 IoCs

pid	Process
2588	fet.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-1-5-21-668679576-120646659-2289335452-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dtfd = "c:\\Program Files\\klesg\\fet.exe \"c:\\Program Files\\klesg\\fethl.dll\",DoAddToFavDlg"	fet.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)	\??\z:	fet.exe
File opened (read-only)	\??\a:	fet.exe
File opened (read-only)	\??\e:	fet.exe
File opened (read-only)	\??\h:	fet.exe
File opened (read-only)	\??\i:	fet.exe
File opened (read-only)	\??\n:	fet.exe
File opened (read-only)	\??\o:	fet.exe
File opened (read-only)	\??\s:	fet.exe
File opened (read-only)	\??\t:	fet.exe
File opened (read-only)	\??\p:	fet.exe
File opened (read-only)	\??\w:	fet.exe
File opened (read-only)	\??\y:	fet.exe
File opened (read-only)	\??\k:	fet.exe
File opened (read-only)	\??\m:	fet.exe
File opened (read-only)	\??\r:	fet.exe
File opened (read-only)	\??\u:	fet.exe
File opened (read-only)	\??\v:	fet.exe
File opened (read-only)	\??\x:	fet.exe
File opened (read-only)	\??\b:	fet.exe
File opened (read-only)	\??\g:	fet.exe
File opened (read-only)	\??\j:	fet.exe
File opened (read-only)	\??\l:	fet.exe
File opened (read-only)	\??\q:	fet.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	fet.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2940-0-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral1/memory/2940-2-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral1/files/0x000c0000000242e6-4.dat	upx
behavioral1/memory/828-11-0x0000000000400000-0x000000000048B000-memory.dmp	upx

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	\??\c:\Program Files\klesg\fethl.dll	gmjri.exe
File created	\??\c:\Program Files\klesg\fet.exe	gmjri.exe
File opened for modification	\??\c:\Program Files\klesg\fet.exe	gmjri.exe
File opened for modification	\??\c:\Program Files\klesg	gmjri.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
4924	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	gmjri.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fet.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-07_809f0194cddad1b9d29be537a8d7189f_coinminer_elex_wannacry.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
4924	cmd.exe
4324	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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	fet.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	fet.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4324	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2588	fet.exe
2588	fet.exe
2588	fet.exe
2588	fet.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2588	fet.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2940	2026-08-07_809f0194cddad1b9d29be537a8d7189f_coinminer_elex_wannacry.exe
828	gmjri.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2940 wrote to memory of 4924	2940	2026-08-07_809f0194cddad1b9d29be537a8d7189f_coinminer_elex_wannacry.exe	87
PID 4924 wrote to memory of 4324	4924	cmd.exe	89
PID 4924 wrote to memory of 828	4924	cmd.exe	91
PID 828 wrote to memory of 2588	828	gmjri.exe	92

C:\Users\Admin\AppData\Local\Temp\2026-08-07_809f0194cddad1b9d29be537a8d7189f_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-07_809f0194cddad1b9d29be537a8d7189f_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2940
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\gmjri.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-07_809f0194cddad1b9d29be537a8d7189f_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:4924
- - 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:4324
- - C:\Users\Admin\AppData\Local\Temp\gmjri.exe
    C:\Users\Admin\AppData\Local\Temp\\gmjri.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-07_809f0194cddad1b9d29be537a8d7189f_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:828
  - - \??\c:\Program Files\klesg\fet.exe
      "c:\Program Files\klesg\fet.exe" "c:\Program Files\klesg\fethl.dll",DoAddToFavDlg C:\Users\Admin\AppData\Local\Temp\gmjri.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:2588

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

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Downloads

gmjri.exe

Path C:\Users\Admin\AppData\Local\Temp\gmjri.exe
Size 592KB
SHA256 f1664f86cae20ccd50f5a4068596b194bd2b22f3bbbbe799f044088bc177ccd6
MD5 37efa3bf55cdaf346c3f42630792cc4e
SHA1 e1702a3ae5712fc5c9b872da783a8c9f0db267bc
SHA512 41291c20168ef8b8233310b4ac736b55b6ee16947d85e7f068944b433dbd93d395786c0625a0d0685ce095d400a269941c718d09eaed51be22b0cc391387a875
SSDEEP 6144:AhBqzw2w/0s/DbAgeonk7n7m8po+yUOKKNG0IxSjXKP+lAzd:aqzw2wsEDbZ67fpLyUB/5qLlq
TLSH
T134D4AD13B2E48865E1A22A72CC7663F0DEF5BED4D935861F5F843A0D2933E00A6157A7
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

fet.exe

Path \??\c:\Program Files\klesg\fet.exe
Size 60KB
SHA256 6cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910
MD5 889b99c52a60dd49227c5e485a016679
SHA1 8fa889e456aa646a4d0a4349977430ce5fa5e2d7
SHA512 08933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641
SSDEEP 1536:H9ykYCTdiHQKrFXmw2RQln5IUmDjoX6+:HlMHprF2nRQln5I
TLSH
T127532AC2FA00C171D4A7563019778F1A5766AC13DB728ACB94B0B4A41EB3291AD3E5FF
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

fethl.dll

Path \??\c:\Program Files\klesg\fethl.dll
Size 171KB
SHA256 0a48a3d1fe607b3ac03b0c5392647d5745b3a32a5b4a1ee635492e1063c3ecee
MD5 a4126b8ed41e06a0f7b4f0c0ea7a79ba
SHA1 d0fdd1ec88bc8e950351e6f57e580f74512c13f1
SHA512 7775d779a30f82cb0b25d7cf75314d372119218122a7896ee626baea38420c6b4902228a6c2ef6dc34f5732528fe3b0c20cdef44c3e7be919d38619a6af687c0
SSDEEP 3072:R2Iz9CI8mUOtDDPwLkBLXLDFkKmvzXBpLHYmmO1QezRd7UcPa1xMjM7OA:Rjz9X8mXGUXVPmr9mOzRd7UcPKoMiA
TLSH
T1280412B0F3F98759F0A716B70831597CC97639826329237FC2889A6EAC5442FF18D764
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/828-11-0x0000000000400000-0x000000000048B000-memory.dmp

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memory/2588-15-0x0000000001030000-0x0000000001032000-memory.dmp

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memory/2588-14-0x0000000010000000-0x0000000010052000-memory.dmp

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memory/2588-17-0x0000000010000000-0x0000000010052000-memory.dmp

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memory/2588-16-0x0000000010000000-0x0000000010052000-memory.dmp

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memory/2588-18-0x0000000010000000-0x0000000010052000-memory.dmp

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memory/2588-19-0x0000000001030000-0x0000000001032000-memory.dmp

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memory/2588-21-0x0000000010000000-0x0000000010052000-memory.dmp

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memory/2588-23-0x0000000010000000-0x0000000010052000-memory.dmp

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memory/2940-2-0x0000000000400000-0x000000000048B000-memory.dmp

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memory/2940-0-0x0000000000400000-0x000000000048B000-memory.dmp

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