stealc | fac0899276ed3be648109e56b22d88ace7fc327b265aa999a7baecad46662f84

Analysis

max time kernel
152s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
08-05-2024 05:01

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General

Target

fac0899276ed3be648109e56b22d88ace7fc327b265aa999a7baecad46662f84.exe
Size

367KB
MD5

f07c1ac2c2b19046e604ae0828dc48d6
SHA1

07f018494f5a591f2fe8495e5969a5d95e981da4
SHA256

fac0899276ed3be648109e56b22d88ace7fc327b265aa999a7baecad46662f84
SHA512

8b3c5195954ea823b80c988380ae8e7809350788f7e40fe8fda06bc79943301ebb45f4e38130d4d17f75b1b1b6de88ea3503f6eca364b1b81a8c41b9e1e9a04e
SSDEEP

6144:GM2eTWsqArSaDRacri00TwSZJtVXZZkJPHloB7DmGxHOs+V4iPTiBq:vbTbqAeMRFr2wU/VXZZkxOmAHOd4iiBq

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
behavioral1/memory/1432-72-0x0000020934710000-0x0000020937F44000-memory.dmp	family_zgrat_v1
behavioral1/memory/1432-73-0x0000020952760000-0x000002095286A000-memory.dmp	family_zgrat_v1
behavioral1/memory/1432-77-0x00000209523F0000-0x0000020952414000-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

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	fac0899276ed3be648109e56b22d88ace7fc327b265aa999a7baecad46662f84.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	u3h4.1.exe

Executes dropped EXE 2 IoCs

pid	Process
1936	u3h4.0.exe
4912	u3h4.1.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
3504	4504	WerFault.exe	92
3780	1936	WerFault.exe	93

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	u3h4.1.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3h4.1.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3h4.1.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	u3h4.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u3h4.0.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
1432	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1432	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1432	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1432	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1432	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1432	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1432	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1432	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1432	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1432	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1432	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1432	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1432	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1432	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1432	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1432	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1432	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1432	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1432	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1432	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1432	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1432	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1432	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1432	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1936	u3h4.0.exe
1936	u3h4.0.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1432	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
4912	u3h4.1.exe
4912	u3h4.1.exe
4912	u3h4.1.exe
4912	u3h4.1.exe
4912	u3h4.1.exe
4912	u3h4.1.exe
4912	u3h4.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
4912	u3h4.1.exe
4912	u3h4.1.exe
4912	u3h4.1.exe
4912	u3h4.1.exe
4912	u3h4.1.exe
4912	u3h4.1.exe
4912	u3h4.1.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4504 wrote to memory of 1936	4504	fac0899276ed3be648109e56b22d88ace7fc327b265aa999a7baecad46662f84.exe	93
PID 4504 wrote to memory of 1936	4504	fac0899276ed3be648109e56b22d88ace7fc327b265aa999a7baecad46662f84.exe	93
PID 4504 wrote to memory of 1936	4504	fac0899276ed3be648109e56b22d88ace7fc327b265aa999a7baecad46662f84.exe	93
PID 4504 wrote to memory of 4912	4504	fac0899276ed3be648109e56b22d88ace7fc327b265aa999a7baecad46662f84.exe	100
PID 4504 wrote to memory of 4912	4504	fac0899276ed3be648109e56b22d88ace7fc327b265aa999a7baecad46662f84.exe	100
PID 4504 wrote to memory of 4912	4504	fac0899276ed3be648109e56b22d88ace7fc327b265aa999a7baecad46662f84.exe	100
PID 4912 wrote to memory of 1432	4912	u3h4.1.exe	110
PID 4912 wrote to memory of 1432	4912	u3h4.1.exe	110

C:\Users\Admin\AppData\Local\Temp\fac0899276ed3be648109e56b22d88ace7fc327b265aa999a7baecad46662f84.exe
"C:\Users\Admin\AppData\Local\Temp\fac0899276ed3be648109e56b22d88ace7fc327b265aa999a7baecad46662f84.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4504
- C:\Users\Admin\AppData\Local\Temp\u3h4.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u3h4.0.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:1936
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1936 -s 820
    3⤵
    - Program crash
    PID:3780
- C:\Users\Admin\AppData\Local\Temp\u3h4.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u3h4.1.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Checks SCSI registry key(s)
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:4912
- - 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:1432
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4504 -s 1524
  2⤵
  - Program crash
  PID:3504

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4504 -ip 4504
1⤵
PID:4272

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1036 --field-trial-handle=2180,i,12780723798465539942,12010519452607841069,262144 --variations-seed-version /prefetch:8
1⤵
PID:3392

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 1936 -ip 1936
1⤵
PID:1788

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\u3h4.0.exe

Filesize
225KB

MD5
defa7c78ede3a0e93381126de0234328

SHA1
90fbdb299db7e54ed706f20821846622a124e6ff

SHA256
1eb49064f0f461813a0e86abb774d7664272f295a21ca0b5847dcfcf91926a24

SHA512
dfd2ca5e8f403ca0668c7c3e8d34367dec0247a77442906ca265acfa7c08496b81d911a7c9c280b5baab05c7b79d3566dd26912501026f9da26a73354a4a9fc8

Download Submit
C:\Users\Admin\AppData\Local\Temp\u3h4.1.exe

Filesize
4.6MB

MD5
397926927bca55be4a77839b1c44de6e

SHA1
e10f3434ef3021c399dbba047832f02b3c898dbd

SHA256
4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

SHA512
cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

Download Submit
memory/1432-92-0x0000020956EB0000-0x0000020956EBE000-memory.dmp

Filesize
56KB

Download
memory/1432-78-0x00000209529C0000-0x00000209529CA000-memory.dmp

Filesize
40KB

Download
memory/1432-91-0x0000020956EE0000-0x0000020956F18000-memory.dmp

Filesize
224KB

Download
memory/1432-77-0x00000209523F0000-0x0000020952414000-memory.dmp

Filesize
144KB

Download
memory/1432-90-0x00000209575A0000-0x00000209575A8000-memory.dmp

Filesize
32KB

Download
memory/1432-76-0x0000020938390000-0x00000209383A4000-memory.dmp

Filesize
80KB

Download
memory/1432-88-0x0000020952BA0000-0x0000020952EA0000-memory.dmp

Filesize
3.0MB

Download
memory/1432-103-0x00000209576A0000-0x00000209576BE000-memory.dmp

Filesize
120KB

Download
memory/1432-101-0x0000020957740000-0x00000209577B6000-memory.dmp

Filesize
472KB

Download
memory/1432-84-0x0000020938350000-0x000002093835A000-memory.dmp

Filesize
40KB

Download
memory/1432-100-0x00000209575E0000-0x00000209575EC000-memory.dmp

Filesize
48KB

Download
memory/1432-97-0x0000020958580000-0x0000020958AA8000-memory.dmp

Filesize
5.2MB

Download
memory/1432-95-0x00000209575F0000-0x0000020957652000-memory.dmp

Filesize
392KB

Download
memory/1432-96-0x0000020957650000-0x0000020957672000-memory.dmp

Filesize
136KB

Download
memory/1432-83-0x0000020952B70000-0x0000020952B92000-memory.dmp

Filesize
136KB

Download
memory/1432-93-0x0000020956ED0000-0x0000020956ED8000-memory.dmp

Filesize
32KB

Download
memory/1432-72-0x0000020934710000-0x0000020937F44000-memory.dmp

Filesize
56.2MB

Download
memory/1432-73-0x0000020952760000-0x000002095286A000-memory.dmp

Filesize
1.0MB

Download
memory/1432-75-0x0000020939C60000-0x0000020939C6C000-memory.dmp

Filesize
48KB

Download
memory/1432-74-0x0000020938380000-0x0000020938390000-memory.dmp

Filesize
64KB

Download
memory/1432-82-0x0000020952B20000-0x0000020952B70000-memory.dmp

Filesize
320KB

Download
memory/1432-81-0x0000020952A20000-0x0000020952AD2000-memory.dmp

Filesize
712KB

Download
memory/1432-94-0x00000209575D0000-0x00000209575DA000-memory.dmp

Filesize
40KB

Download
memory/1432-80-0x00000209529F0000-0x0000020952A1A000-memory.dmp

Filesize
168KB

Download
memory/1936-14-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/1936-107-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/1936-67-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/1936-33-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/1936-105-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/1936-15-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/1936-109-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/4504-39-0x0000000000400000-0x0000000001A26000-memory.dmp

Filesize
22.1MB

Download
memory/4504-1-0x0000000001A40000-0x0000000001B40000-memory.dmp

Filesize
1024KB

Download
memory/4504-5-0x0000000000400000-0x0000000001A26000-memory.dmp

Filesize
22.1MB

Download
memory/4504-40-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/4504-34-0x0000000003780000-0x00000000037EC000-memory.dmp

Filesize
432KB

Download
memory/4504-2-0x0000000003780000-0x00000000037EC000-memory.dmp

Filesize
432KB

Download
memory/4504-16-0x0000000000400000-0x0000000001A26000-memory.dmp

Filesize
22.1MB

Download
memory/4504-17-0x0000000001A40000-0x0000000001B40000-memory.dmp

Filesize
1024KB

Download
memory/4504-3-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/4912-71-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/4912-68-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/4912-41-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download