stealc | 512c847e0584a2cf2c9a5d67011c22c1c5ab8c795fd81ab0f9127c44d2ceaa2b

Analysis

max time kernel
149s
max time network
144s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
09-05-2024 13:02

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General

Target

512c847e0584a2cf2c9a5d67011c22c1c5ab8c795fd81ab0f9127c44d2ceaa2b.exe
Size

382KB
MD5

71feb6a46b07a1fe770fddbd0038c4b0
SHA1

c4bc9c4ac264b2935bae4796e3356f7011f4580a
SHA256

512c847e0584a2cf2c9a5d67011c22c1c5ab8c795fd81ab0f9127c44d2ceaa2b
SHA512

010434585da444f048add5394ba4621415c600752d728a83f27e05139866a0d03c0e7a8bb69de6920547ab843b8112d635fdd48379bad018b4c5dd95eca9fac9
SSDEEP

6144:1jNHmrGVx/2m1f+eo864r+m4fSw3Axa3Uet46nBeJKto:1jNGexJo8raXfS8Axa35t46nUJKto

Score

10^/10

stealc zgrat discovery rat stealer

Malware Config

Extracted

Family

stealc

http://185.172.128.150

Attributes

url_path
/c698e1bc8a2f5e6d.php

Signatures

Detect ZGRat V1 3 IoCs

resource	yara_rule
behavioral2/memory/2484-65-0x0000021039950000-0x000002103D184000-memory.dmp	family_zgrat_v1
behavioral2/memory/2484-70-0x000002103EEE0000-0x000002103EF04000-memory.dmp	family_zgrat_v1
behavioral2/memory/2484-66-0x0000021057A90000-0x0000021057B9A000-memory.dmp	family_zgrat_v1

Stealc
Stealc is an infostealer written in C++.
stealer stealc
ZGRat
ZGRat is remote access trojan written in C#.
rat zgrat
Downloads MZ/PE file

Executes dropped EXE 2 IoCs

pid	Process
1848	u3hk.0.exe
572	u3hk.1.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4844	4520	WerFault.exe	78

Checks SCSI registry key(s) 3 TTPs 3 IoCs

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

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3hk.1.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3hk.1.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3hk.1.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	u3hk.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u3hk.0.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
2484	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2484	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2484	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2484	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2484	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2484	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2484	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2484	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2484	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2484	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2484	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2484	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2484	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2484	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2484	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2484	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2484	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2484	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2484	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1848	u3hk.0.exe
1848	u3hk.0.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2484	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
572	u3hk.1.exe
572	u3hk.1.exe
572	u3hk.1.exe
572	u3hk.1.exe
572	u3hk.1.exe
572	u3hk.1.exe
572	u3hk.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
572	u3hk.1.exe
572	u3hk.1.exe
572	u3hk.1.exe
572	u3hk.1.exe
572	u3hk.1.exe
572	u3hk.1.exe
572	u3hk.1.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4520 wrote to memory of 1848	4520	512c847e0584a2cf2c9a5d67011c22c1c5ab8c795fd81ab0f9127c44d2ceaa2b.exe	81
PID 4520 wrote to memory of 1848	4520	512c847e0584a2cf2c9a5d67011c22c1c5ab8c795fd81ab0f9127c44d2ceaa2b.exe	81
PID 4520 wrote to memory of 1848	4520	512c847e0584a2cf2c9a5d67011c22c1c5ab8c795fd81ab0f9127c44d2ceaa2b.exe	81
PID 4520 wrote to memory of 572	4520	512c847e0584a2cf2c9a5d67011c22c1c5ab8c795fd81ab0f9127c44d2ceaa2b.exe	84
PID 4520 wrote to memory of 572	4520	512c847e0584a2cf2c9a5d67011c22c1c5ab8c795fd81ab0f9127c44d2ceaa2b.exe	84
PID 4520 wrote to memory of 572	4520	512c847e0584a2cf2c9a5d67011c22c1c5ab8c795fd81ab0f9127c44d2ceaa2b.exe	84
PID 572 wrote to memory of 2484	572	u3hk.1.exe	89
PID 572 wrote to memory of 2484	572	u3hk.1.exe	89

C:\Users\Admin\AppData\Local\Temp\512c847e0584a2cf2c9a5d67011c22c1c5ab8c795fd81ab0f9127c44d2ceaa2b.exe
"C:\Users\Admin\AppData\Local\Temp\512c847e0584a2cf2c9a5d67011c22c1c5ab8c795fd81ab0f9127c44d2ceaa2b.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4520
- C:\Users\Admin\AppData\Local\Temp\u3hk.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u3hk.0.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:1848
- C:\Users\Admin\AppData\Local\Temp\u3hk.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u3hk.1.exe"
  2⤵
  - Executes dropped EXE
  - Checks SCSI registry key(s)
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:572
- - C:\Users\Admin\AppData\Local\Temp\iolo\dm\SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
    "C:\Users\Admin\AppData\Local\Temp\iolo\dm\SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe" /eieci=11A12794-499E-4FA0-A281-A9A9AA8B2685 /eipi=5488CB36-BE62-4606-B07B-2EE938868BD1
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2484
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4520 -s 1172
  2⤵
  - Program crash
  PID:4844

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 4520 -ip 4520
1⤵
PID:2284

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\u3hk.0.exe

Filesize
218KB

MD5
5246be38e251c182f838adf4ef42ad40

SHA1
fe09ba5ee40d4c4897c8f8e3fa819c13b0e324d9

SHA256
7dbf762b2ef2b651a4e8c7b7d9b8996a1de0cfa44119452f1d3f29bfe03dfd86

SHA512
a3f7c75a2355935d19c733d67aeff3e08f382ae60c1ba45364974ff91ca779ac5e49c40475fe35b8923a130e8670de0311fdf3c03de935312869e9a9a8b21b14

Download Submit
C:\Users\Admin\AppData\Local\Temp\u3hk.1.exe

Filesize
4.6MB

MD5
397926927bca55be4a77839b1c44de6e

SHA1
e10f3434ef3021c399dbba047832f02b3c898dbd

SHA256
4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

SHA512
cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

Download Submit
memory/572-64-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/1848-120-0x0000000000400000-0x0000000002AF3000-memory.dmp

Filesize
38.9MB

Download
memory/1848-114-0x0000000000400000-0x0000000002AF3000-memory.dmp

Filesize
38.9MB

Download
memory/1848-106-0x0000000000400000-0x0000000002AF3000-memory.dmp

Filesize
38.9MB

Download
memory/1848-100-0x0000000000400000-0x0000000002AF3000-memory.dmp

Filesize
38.9MB

Download
memory/1848-36-0x0000000000400000-0x0000000002AF3000-memory.dmp

Filesize
38.9MB

Download
memory/1848-52-0x0000000000400000-0x0000000002AF3000-memory.dmp

Filesize
38.9MB

Download
memory/2484-76-0x000002103D5F0000-0x000002103D5FA000-memory.dmp

Filesize
40KB

Download
memory/2484-86-0x000002105C370000-0x000002105C37A000-memory.dmp

Filesize
40KB

Download
memory/2484-69-0x000002103D800000-0x000002103D814000-memory.dmp

Filesize
80KB

Download
memory/2484-70-0x000002103EEE0000-0x000002103EF04000-memory.dmp

Filesize
144KB

Download
memory/2484-68-0x000002103D810000-0x000002103D81C000-memory.dmp

Filesize
48KB

Download
memory/2484-74-0x0000021057ED0000-0x0000021057F20000-memory.dmp

Filesize
320KB

Download
memory/2484-75-0x0000021057E80000-0x0000021057EA2000-memory.dmp

Filesize
136KB

Download
memory/2484-73-0x0000021057DD0000-0x0000021057E82000-memory.dmp

Filesize
712KB

Download
memory/2484-72-0x0000021057C00000-0x0000021057C2A000-memory.dmp

Filesize
168KB

Download
memory/2484-97-0x00000210578D0000-0x0000021057A83000-memory.dmp

Filesize
1.7MB

Download
memory/2484-80-0x0000021057F20000-0x0000021058220000-memory.dmp

Filesize
3.0MB

Download
memory/2484-71-0x0000021057BE0000-0x0000021057BEA000-memory.dmp

Filesize
40KB

Download
memory/2484-67-0x000002103D7F0000-0x000002103D800000-memory.dmp

Filesize
64KB

Download
memory/2484-66-0x0000021057A90000-0x0000021057B9A000-memory.dmp

Filesize
1.0MB

Download
memory/2484-82-0x000002105BBF0000-0x000002105BBF8000-memory.dmp

Filesize
32KB

Download
memory/2484-65-0x0000021039950000-0x000002103D184000-memory.dmp

Filesize
56.2MB

Download
memory/2484-88-0x000002105CC90000-0x000002105CCB2000-memory.dmp

Filesize
136KB

Download
memory/2484-87-0x000002105CC30000-0x000002105CC92000-memory.dmp

Filesize
392KB

Download
memory/2484-89-0x000002105D1E0000-0x000002105D708000-memory.dmp

Filesize
5.2MB

Download
memory/2484-92-0x000002105C9A0000-0x000002105C9AC000-memory.dmp

Filesize
48KB

Download
memory/2484-85-0x000002105C2E0000-0x000002105C2E8000-memory.dmp

Filesize
32KB

Download
memory/2484-84-0x000002105C2C0000-0x000002105C2CE000-memory.dmp

Filesize
56KB

Download
memory/2484-83-0x000002105C300000-0x000002105C338000-memory.dmp

Filesize
224KB

Download
memory/2484-93-0x000002105CD80000-0x000002105CDF6000-memory.dmp

Filesize
472KB

Download
memory/2484-94-0x000002105CCE0000-0x000002105CCFE000-memory.dmp

Filesize
120KB

Download
memory/4520-1-0x0000000002BF0000-0x0000000002CF0000-memory.dmp

Filesize
1024KB

Download
memory/4520-30-0x0000000000400000-0x0000000002B1D000-memory.dmp

Filesize
39.1MB

Download
memory/4520-35-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/4520-2-0x0000000002E90000-0x0000000002EFC000-memory.dmp

Filesize
432KB

Download
memory/4520-3-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download