stealc | 3b68626673241b76545dd5acc4ed482c6c612245a2c42eadffd6377837377817

Analysis

max time kernel
146s
max time network
139s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
09-05-2024 04:52

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General

Target

3b68626673241b76545dd5acc4ed482c6c612245a2c42eadffd6377837377817.exe
Size

365KB
MD5

57aafcc21a68ae2965f35962bd28c98c
SHA1

6f5f108de8bd8dcbf364329133357937d047c852
SHA256

3b68626673241b76545dd5acc4ed482c6c612245a2c42eadffd6377837377817
SHA512

9e63685e94212a3170c22ad25b37248c1f28ab71b29dbb4b35d99c00a725cbc781ee7446a7cf16374390dbf0116f3ef22e96ad483f0b4c1f8978be8d21360774
SSDEEP

6144:PaX7EMN6qa0aDkM2fzyL8uD1OQma0Ow9bcip87002dK4:PM5NKPkM2fzg1OiFt7FyK4

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/4876-62-0x000002B003AA0000-0x000002B0072D4000-memory.dmp	family_zgrat_v1
behavioral2/memory/4876-63-0x000002B021A00000-0x000002B021B0A000-memory.dmp	family_zgrat_v1
behavioral2/memory/4876-67-0x000002B021B60000-0x000002B021B84000-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
3808	u3so.0.exe
3372	u3so.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 2 IoCs

pid	pid_target	Process	procid_target
3448	4920	WerFault.exe	76
3356	3808	WerFault.exe	77

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	u3so.1.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3so.1.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3so.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	u3so.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u3so.0.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
4876	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4876	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4876	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4876	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4876	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4876	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4876	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4876	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4876	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4876	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4876	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4876	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4876	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4876	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4876	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4876	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4876	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4876	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4876	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3808	u3so.0.exe
3808	u3so.0.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4876	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
3372	u3so.1.exe
3372	u3so.1.exe
3372	u3so.1.exe
3372	u3so.1.exe
3372	u3so.1.exe
3372	u3so.1.exe
3372	u3so.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
3372	u3so.1.exe
3372	u3so.1.exe
3372	u3so.1.exe
3372	u3so.1.exe
3372	u3so.1.exe
3372	u3so.1.exe
3372	u3so.1.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4920 wrote to memory of 3808	4920	3b68626673241b76545dd5acc4ed482c6c612245a2c42eadffd6377837377817.exe	77
PID 4920 wrote to memory of 3808	4920	3b68626673241b76545dd5acc4ed482c6c612245a2c42eadffd6377837377817.exe	77
PID 4920 wrote to memory of 3808	4920	3b68626673241b76545dd5acc4ed482c6c612245a2c42eadffd6377837377817.exe	77
PID 4920 wrote to memory of 3372	4920	3b68626673241b76545dd5acc4ed482c6c612245a2c42eadffd6377837377817.exe	80
PID 4920 wrote to memory of 3372	4920	3b68626673241b76545dd5acc4ed482c6c612245a2c42eadffd6377837377817.exe	80
PID 4920 wrote to memory of 3372	4920	3b68626673241b76545dd5acc4ed482c6c612245a2c42eadffd6377837377817.exe	80
PID 3372 wrote to memory of 4876	3372	u3so.1.exe	85
PID 3372 wrote to memory of 4876	3372	u3so.1.exe	85

C:\Users\Admin\AppData\Local\Temp\3b68626673241b76545dd5acc4ed482c6c612245a2c42eadffd6377837377817.exe
"C:\Users\Admin\AppData\Local\Temp\3b68626673241b76545dd5acc4ed482c6c612245a2c42eadffd6377837377817.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4920
- C:\Users\Admin\AppData\Local\Temp\u3so.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u3so.0.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3808
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3808 -s 1180
    3⤵
    - Program crash
    PID:3356
- C:\Users\Admin\AppData\Local\Temp\u3so.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u3so.1.exe"
  2⤵
  - Executes dropped EXE
  - Checks SCSI registry key(s)
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:3372
- - 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:4876
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4920 -s 976
  2⤵
  - Program crash
  PID:3448

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 4920 -ip 4920
1⤵
PID:3316

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 3808 -ip 3808
1⤵
PID:5064

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\u3so.0.exe

Filesize
260KB

MD5
6162ac18a404aca27ee981ce4231df59

SHA1
5b133899a53375e5d97540fba94a57a065bd8927

SHA256
024294f22a290e5e1729596c49f2509955f301f29106fe0f67413f7e2a88f2d9

SHA512
18ba20e182baab7addade3d282813833439dd1f1b7cf9ef4a1128e04409e2becd76c14d207887c8ec8413541c99581b864b046331c1b9791021f3f1507783695

Download Submit
C:\Users\Admin\AppData\Local\Temp\u3so.1.exe

Filesize
4.6MB

MD5
397926927bca55be4a77839b1c44de6e

SHA1
e10f3434ef3021c399dbba047832f02b3c898dbd

SHA256
4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

SHA512
cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

Download Submit
memory/3372-50-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/3372-61-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/3808-90-0x0000000000400000-0x0000000002AFE000-memory.dmp

Filesize
39.0MB

Download
memory/3808-103-0x0000000000400000-0x0000000002AFE000-memory.dmp

Filesize
39.0MB

Download
memory/3808-101-0x0000000000400000-0x0000000002AFE000-memory.dmp

Filesize
39.0MB

Download
memory/3808-99-0x0000000000400000-0x0000000002AFE000-memory.dmp

Filesize
39.0MB

Download
memory/3808-96-0x0000000000400000-0x0000000002AFE000-memory.dmp

Filesize
39.0MB

Download
memory/3808-94-0x0000000000400000-0x0000000002AFE000-memory.dmp

Filesize
39.0MB

Download
memory/4876-72-0x000002B021E90000-0x000002B021EB2000-memory.dmp

Filesize
136KB

Download
memory/4876-81-0x000002B026220000-0x000002B02622E000-memory.dmp

Filesize
56KB

Download
memory/4876-64-0x000002B0219C0000-0x000002B0219D0000-memory.dmp

Filesize
64KB

Download
memory/4876-65-0x000002B0219E0000-0x000002B0219EC000-memory.dmp

Filesize
48KB

Download
memory/4876-66-0x000002B0219D0000-0x000002B0219E4000-memory.dmp

Filesize
80KB

Download
memory/4876-67-0x000002B021B60000-0x000002B021B84000-memory.dmp

Filesize
144KB

Download
memory/4876-68-0x000002B021CE0000-0x000002B021CEA000-memory.dmp

Filesize
40KB

Download
memory/4876-69-0x000002B021D10000-0x000002B021D3A000-memory.dmp

Filesize
168KB

Download
memory/4876-70-0x000002B021D40000-0x000002B021DF2000-memory.dmp

Filesize
712KB

Download
memory/4876-71-0x000002B021E40000-0x000002B021E90000-memory.dmp

Filesize
320KB

Download
memory/4876-92-0x000002B0269F0000-0x000002B026A0E000-memory.dmp

Filesize
120KB

Download
memory/4876-73-0x000002B0077D0000-0x000002B0077DA000-memory.dmp

Filesize
40KB

Download
memory/4876-77-0x000002B021EC0000-0x000002B0221C0000-memory.dmp

Filesize
3.0MB

Download
memory/4876-79-0x000002B025DD0000-0x000002B025DD8000-memory.dmp

Filesize
32KB

Download
memory/4876-80-0x000002B026260000-0x000002B026298000-memory.dmp

Filesize
224KB

Download
memory/4876-63-0x000002B021A00000-0x000002B021B0A000-memory.dmp

Filesize
1.0MB

Download
memory/4876-82-0x000002B026240000-0x000002B026248000-memory.dmp

Filesize
32KB

Download
memory/4876-83-0x000002B026BB0000-0x000002B026BBA000-memory.dmp

Filesize
40KB

Download
memory/4876-84-0x000002B026930000-0x000002B026992000-memory.dmp

Filesize
392KB

Download
memory/4876-85-0x000002B026990000-0x000002B0269B2000-memory.dmp

Filesize
136KB

Download
memory/4876-86-0x000002B0270F0000-0x000002B027618000-memory.dmp

Filesize
5.2MB

Download
memory/4876-89-0x000002B0269B0000-0x000002B0269BC000-memory.dmp

Filesize
48KB

Download
memory/4876-62-0x000002B003AA0000-0x000002B0072D4000-memory.dmp

Filesize
56.2MB

Download
memory/4876-91-0x000002B026A90000-0x000002B026B06000-memory.dmp

Filesize
472KB

Download
memory/4920-3-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/4920-28-0x0000000000400000-0x0000000002B19000-memory.dmp

Filesize
39.1MB

Download
memory/4920-29-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/4920-13-0x0000000000400000-0x0000000002B19000-memory.dmp

Filesize
39.1MB

Download
memory/4920-1-0x0000000002BD0000-0x0000000002CD0000-memory.dmp

Filesize
1024KB

Download
memory/4920-2-0x0000000004890000-0x00000000048FC000-memory.dmp

Filesize
432KB

Download