stealc | 4097b2db5f655efc8134e76a331bf61f86c7f0485ce4421054e9744c9604c2c3

Analysis

max time kernel
141s
max time network
136s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
09-05-2024 16:31

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General

Target

4097b2db5f655efc8134e76a331bf61f86c7f0485ce4421054e9744c9604c2c3.exe
Size

384KB
MD5

2ef1178c7aa6f8898917e084709a6a25
SHA1

80d524f575a8dffa8754250782ddd9f1a2ead5ff
SHA256

4097b2db5f655efc8134e76a331bf61f86c7f0485ce4421054e9744c9604c2c3
SHA512

266c88c4031f3fbf101b2c6b3a61037cde7dafd48d658b93072e405beeeb9796a58bb2a3e4a4c8ee67ef9e63c37b2694d662f8dcdfca73081841aee77224c48c
SSDEEP

6144:CvNcF7Kk1SAa5i2mfLPrzOMWRTco+7ASGdHhyUZwS8:CvNo+nAa5gnXo+c8aT8

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/4424-68-0x0000023B11420000-0x0000023B14C54000-memory.dmp	family_zgrat_v1
behavioral1/memory/4424-69-0x0000023B301E0000-0x0000023B302EA000-memory.dmp	family_zgrat_v1
behavioral1/memory/4424-73-0x0000023B16A10000-0x0000023B16A34000-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-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation	4097b2db5f655efc8134e76a331bf61f86c7f0485ce4421054e9744c9604c2c3.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation	u3r8.1.exe

Executes dropped EXE 2 IoCs

pid	Process
3384	u3r8.0.exe
2564	u3r8.1.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
2516	4868	WerFault.exe	81
4140	3384	WerFault.exe	92

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	u3r8.1.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3r8.1.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3r8.1.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	u3r8.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u3r8.0.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
4424	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4424	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4424	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4424	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4424	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4424	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4424	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4424	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4424	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4424	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4424	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4424	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4424	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4424	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4424	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4424	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4424	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4424	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4424	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4424	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4424	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4424	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4424	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3384	u3r8.0.exe
3384	u3r8.0.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4424	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
2564	u3r8.1.exe
2564	u3r8.1.exe
2564	u3r8.1.exe
2564	u3r8.1.exe
2564	u3r8.1.exe
2564	u3r8.1.exe
2564	u3r8.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
2564	u3r8.1.exe
2564	u3r8.1.exe
2564	u3r8.1.exe
2564	u3r8.1.exe
2564	u3r8.1.exe
2564	u3r8.1.exe
2564	u3r8.1.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4868 wrote to memory of 3384	4868	4097b2db5f655efc8134e76a331bf61f86c7f0485ce4421054e9744c9604c2c3.exe	92
PID 4868 wrote to memory of 3384	4868	4097b2db5f655efc8134e76a331bf61f86c7f0485ce4421054e9744c9604c2c3.exe	92
PID 4868 wrote to memory of 3384	4868	4097b2db5f655efc8134e76a331bf61f86c7f0485ce4421054e9744c9604c2c3.exe	92
PID 4868 wrote to memory of 2564	4868	4097b2db5f655efc8134e76a331bf61f86c7f0485ce4421054e9744c9604c2c3.exe	95
PID 4868 wrote to memory of 2564	4868	4097b2db5f655efc8134e76a331bf61f86c7f0485ce4421054e9744c9604c2c3.exe	95
PID 4868 wrote to memory of 2564	4868	4097b2db5f655efc8134e76a331bf61f86c7f0485ce4421054e9744c9604c2c3.exe	95
PID 2564 wrote to memory of 4424	2564	u3r8.1.exe	101
PID 2564 wrote to memory of 4424	2564	u3r8.1.exe	101

C:\Users\Admin\AppData\Local\Temp\4097b2db5f655efc8134e76a331bf61f86c7f0485ce4421054e9744c9604c2c3.exe
"C:\Users\Admin\AppData\Local\Temp\4097b2db5f655efc8134e76a331bf61f86c7f0485ce4421054e9744c9604c2c3.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4868
- C:\Users\Admin\AppData\Local\Temp\u3r8.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u3r8.0.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3384
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3384 -s 1264
    3⤵
    - Program crash
    PID:4140
- C:\Users\Admin\AppData\Local\Temp\u3r8.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u3r8.1.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:2564
- - 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:4424
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4868 -s 1036
  2⤵
  - Program crash
  PID:2516

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 4868 -ip 4868
1⤵
PID:2800

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 3384 -ip 3384
1⤵
PID:4412

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\u3r8.0.exe

Filesize
217KB

MD5
1485fe25a6d2bc50d097656c434822f1

SHA1
b8a4f204a92bad32df0e6af82a4ae04d71910ba9

SHA256
044d3469fd7a09f42ba4d342604e002f0ba770528747ba6d3cb7c4b77a975be6

SHA512
18346906dd80342281579602860c514f8e535bf25b3a0f1abe56f08aab52f203323b8d279e8df7c3723acf989aa0d438866675c22095386f8632a543b5dceaf0

Download Submit
C:\Users\Admin\AppData\Local\Temp\u3r8.1.exe

Filesize
4.6MB

MD5
397926927bca55be4a77839b1c44de6e

SHA1
e10f3434ef3021c399dbba047832f02b3c898dbd

SHA256
4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

SHA512
cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

Download Submit
memory/2564-67-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/2564-54-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/3384-105-0x0000000000400000-0x0000000002AF3000-memory.dmp

Filesize
38.9MB

Download
memory/3384-103-0x0000000000400000-0x0000000002AF3000-memory.dmp

Filesize
38.9MB

Download
memory/3384-101-0x0000000000400000-0x0000000002AF3000-memory.dmp

Filesize
38.9MB

Download
memory/3384-99-0x0000000000400000-0x0000000002AF3000-memory.dmp

Filesize
38.9MB

Download
memory/3384-37-0x0000000000400000-0x0000000002AF3000-memory.dmp

Filesize
38.9MB

Download
memory/3384-53-0x0000000000400000-0x0000000002AF3000-memory.dmp

Filesize
38.9MB

Download
memory/4424-76-0x0000023B305E0000-0x0000023B30692000-memory.dmp

Filesize
712KB

Download
memory/4424-95-0x0000023B35960000-0x0000023B3596C000-memory.dmp

Filesize
48KB

Download
memory/4424-69-0x0000023B301E0000-0x0000023B302EA000-memory.dmp

Filesize
1.0MB

Download
memory/4424-71-0x0000023B16A00000-0x0000023B16A0C000-memory.dmp

Filesize
48KB

Download
memory/4424-70-0x0000023B16830000-0x0000023B16840000-memory.dmp

Filesize
64KB

Download
memory/4424-72-0x0000023B169F0000-0x0000023B16A04000-memory.dmp

Filesize
80KB

Download
memory/4424-73-0x0000023B16A10000-0x0000023B16A34000-memory.dmp

Filesize
144KB

Download
memory/4424-77-0x0000023B30690000-0x0000023B306E0000-memory.dmp

Filesize
320KB

Download
memory/4424-97-0x0000023B359A0000-0x0000023B359BE000-memory.dmp

Filesize
120KB

Download
memory/4424-75-0x0000023B302F0000-0x0000023B3031A000-memory.dmp

Filesize
168KB

Download
memory/4424-74-0x0000023B16A30000-0x0000023B16A3A000-memory.dmp

Filesize
40KB

Download
memory/4424-78-0x0000023B30350000-0x0000023B30372000-memory.dmp

Filesize
136KB

Download
memory/4424-79-0x0000023B2F200000-0x0000023B2F20A000-memory.dmp

Filesize
40KB

Download
memory/4424-83-0x0000023B306E0000-0x0000023B309E0000-memory.dmp

Filesize
3.0MB

Download
memory/4424-85-0x0000023B35110000-0x0000023B35118000-memory.dmp

Filesize
32KB

Download
memory/4424-88-0x0000023B34A40000-0x0000023B34A48000-memory.dmp

Filesize
32KB

Download
memory/4424-87-0x0000023B34A20000-0x0000023B34A2E000-memory.dmp

Filesize
56KB

Download
memory/4424-86-0x0000023B34A50000-0x0000023B34A88000-memory.dmp

Filesize
224KB

Download
memory/4424-91-0x0000023B35940000-0x0000023B35962000-memory.dmp

Filesize
136KB

Download
memory/4424-90-0x0000023B35BE0000-0x0000023B35C42000-memory.dmp

Filesize
392KB

Download
memory/4424-89-0x0000023B35BC0000-0x0000023B35BCA000-memory.dmp

Filesize
40KB

Download
memory/4424-92-0x0000023B36170000-0x0000023B36698000-memory.dmp

Filesize
5.2MB

Download
memory/4424-68-0x0000023B11420000-0x0000023B14C54000-memory.dmp

Filesize
56.2MB

Download
memory/4424-96-0x0000023B35A40000-0x0000023B35AB6000-memory.dmp

Filesize
472KB

Download
memory/4868-3-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/4868-32-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/4868-30-0x0000000000400000-0x0000000002B1E000-memory.dmp

Filesize
39.1MB

Download
memory/4868-1-0x0000000002C10000-0x0000000002D10000-memory.dmp

Filesize
1024KB

Download
memory/4868-2-0x0000000002DE0000-0x0000000002E4C000-memory.dmp

Filesize
432KB

Download