cybrexagent | 39158d7688762a0f4deedc411092a812a70e1fad0f7c06f51ea3b9d3045f1590

Analysis

max time kernel
150s
max time network
119s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
02/08/2026, 23:47

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General

Target
2026-08-02_ba3c7e00223b6652066c6aaeafe42eb1_akira_glassworm_icedid_luca-stealer_rusty-stealer.exe
Size 11.9MB
Sample260802-3sxgratfnd
SHA256 39158d7688762a0f4deedc411092a812a70e1fad0f7c06f51ea3b9d3045f1590
MD5 ba3c7e00223b6652066c6aaeafe42eb1
SHA1 1792708eb9f91f31885c89f61a256009b792adce
SHA512 b44c2f49573d135acc0ef7565f56987b0662388098715ad0934b032feb2d9dd55c6913c5c69109f1ea8ce42a3df802ae9af3c0c9fa32b97f561988462948418d
SSDEEP 98304:EFVqup9CfWMp+9dvBF7wFfr9+kNAPX9Nu0T7poMF:eqA5B66Nu0
TLSH
T175C64B16FAAA54ECC45AC474C3564A23AA3174CA0B35BAFF45C485783F6ABF06E3C714
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery execution cybrexagent stealer

Malware Config

Signatures

Family: CybrexAgent
CybrexAgent is a Windows stealer written in Rust.
stealer cybrexagent

Detects CybrexAgent 1 IoCs

resource	yara_rule
behavioral2/files/0x000f00000001c54b-0.dat	family_cybrexagent

Detects executables containing SQL queries to confidential data stores. Observed in infostealers 1 IoCs

resource	yara_rule
behavioral2/files/0x000f00000001c54b-0.dat	INDICATOR_SUSPICIOUS_EXE_SQLQuery_ConfidentialDataStore

Executes dropped EXE 1 IoCs

pid	Process
5624	CybRex_Agent_Secure.exe

Looks up external IP address via web service 1 TTPs 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

discovery

Internet Connection Discovery

T1016.001

flow	ioc
1	ip-api.com

Executes a command shell one-liner 1 TTPs 3 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
1216	cmd.exe
1524	cmd.exe
4980	cmd.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1104 wrote to memory of 1216	1104	2026-08-02_ba3c7e00223b6652066c6aaeafe42eb1_akira_glassworm_icedid_luca-stealer_rusty-stealer.exe	89
PID 1104 wrote to memory of 1524	1104	2026-08-02_ba3c7e00223b6652066c6aaeafe42eb1_akira_glassworm_icedid_luca-stealer_rusty-stealer.exe	91
PID 1524 wrote to memory of 5624	1524	cmd.exe	93
PID 5624 wrote to memory of 4980	5624	CybRex_Agent_Secure.exe	94
PID 4980 wrote to memory of 236	4980	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\2026-08-02_ba3c7e00223b6652066c6aaeafe42eb1_akira_glassworm_icedid_luca-stealer_rusty-stealer.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-02_ba3c7e00223b6652066c6aaeafe42eb1_akira_glassworm_icedid_luca-stealer_rusty-stealer.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1104
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c copy /Y C:\Users\Admin\AppData\Local\Temp\2026-08-02_ba3c7e00223b6652066c6aaeafe42eb1_akira_glassworm_icedid_luca-stealer_rusty-stealer.exe C:\Users\Admin\AppData\Local\CybRex_Agent_Secure\CybRex_Agent_Secure.exe
  2⤵
  - Executes a command shell one-liner
  PID:1216
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c start "" C:\Users\Admin\AppData\Local\CybRex_Agent_Secure\CybRex_Agent_Secure.exe
  2⤵
  - Executes a command shell one-liner
  - Suspicious use of WriteProcessMemory
  PID:1524
- - C:\Users\Admin\AppData\Local\CybRex_Agent_Secure\CybRex_Agent_Secure.exe
    C:\Users\Admin\AppData\Local\CybRex_Agent_Secure\CybRex_Agent_Secure.exe
    3⤵
    - Executes dropped EXE
    - Suspicious use of WriteProcessMemory
    PID:5624
  - - C:\Windows\system32\cmd.exe
      "cmd" /C "reg query HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Cryptography /v MachineGuid"
      4⤵
      Executes a command shell one-liner
      Suspicious use of WriteProcessMemory
      PID:4980
    - - C:\Windows\system32\reg.exe
        
        reg query HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Cryptography /v MachineGuid
        5⤵
        
        PID:236

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Windows Command Shell

T1059.003

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

CybRex_Agent_Secure.exe

Path C:\Users\Admin\AppData\Local\CybRex_Agent_Secure\CybRex_Agent_Secure.exe
Size 11.9MB
SHA256 39158d7688762a0f4deedc411092a812a70e1fad0f7c06f51ea3b9d3045f1590
MD5 ba3c7e00223b6652066c6aaeafe42eb1
SHA1 1792708eb9f91f31885c89f61a256009b792adce
SHA512 b44c2f49573d135acc0ef7565f56987b0662388098715ad0934b032feb2d9dd55c6913c5c69109f1ea8ce42a3df802ae9af3c0c9fa32b97f561988462948418d
SSDEEP 98304:EFVqup9CfWMp+9dvBF7wFfr9+kNAPX9Nu0T7poMF:eqA5B66Nu0
TLSH
T175C64B16FAAA54ECC45AC474C3564A23AA3174CA0B35BAFF45C485783F6ABF06E3C714
MD5 SHA1 SHA512 SSDEEP TLSH

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