stealc | c07240cf31f035624dddc623250edfdf642c36d925c69f8e4c5cd745e08f4fc2

Analysis

max time kernel
146s
max time network
151s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
08-05-2024 05:06

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General

Target

c07240cf31f035624dddc623250edfdf642c36d925c69f8e4c5cd745e08f4fc2.exe
Size

367KB
MD5

f277cec4ca6d2cbb1d71f2ff2d60bc46
SHA1

79daf0d068bbc29368980df3ede1e32eecbd1eeb
SHA256

c07240cf31f035624dddc623250edfdf642c36d925c69f8e4c5cd745e08f4fc2
SHA512

f75f47a3d5b3659cebcf7100af63e5c1b92d19b543165a413ab435da501f119bd322f845691b3a6f406af0ca5c0a6985dbabd1ca64df7cdbe5238af3a718f7cc
SSDEEP

6144:GM2eTWsqArSaDRacri00TwSZJtVXZZkJPHloB7DmGxHOs+V4iPTiBv:vbTbqAeMRFr2wU/VXZZkxOmAHOd4iiBv

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/2396-65-0x00000245AA880000-0x00000245AE0B4000-memory.dmp	family_zgrat_v1
behavioral2/memory/2396-66-0x00000245C8950000-0x00000245C8A5A000-memory.dmp	family_zgrat_v1
behavioral2/memory/2396-70-0x00000245C87F0000-0x00000245C8814000-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
3592	u29k.0.exe
1460	u29k.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
4744	2936	WerFault.exe	79
4796	3592	WerFault.exe	81

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	u29k.1.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u29k.1.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u29k.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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u29k.0.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	u29k.0.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
2396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3592	u29k.0.exe
3592	u29k.0.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2396	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
1460	u29k.1.exe
1460	u29k.1.exe
1460	u29k.1.exe
1460	u29k.1.exe
1460	u29k.1.exe
1460	u29k.1.exe
1460	u29k.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
1460	u29k.1.exe
1460	u29k.1.exe
1460	u29k.1.exe
1460	u29k.1.exe
1460	u29k.1.exe
1460	u29k.1.exe
1460	u29k.1.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2936 wrote to memory of 3592	2936	c07240cf31f035624dddc623250edfdf642c36d925c69f8e4c5cd745e08f4fc2.exe	81
PID 2936 wrote to memory of 3592	2936	c07240cf31f035624dddc623250edfdf642c36d925c69f8e4c5cd745e08f4fc2.exe	81
PID 2936 wrote to memory of 3592	2936	c07240cf31f035624dddc623250edfdf642c36d925c69f8e4c5cd745e08f4fc2.exe	81
PID 2936 wrote to memory of 1460	2936	c07240cf31f035624dddc623250edfdf642c36d925c69f8e4c5cd745e08f4fc2.exe	84
PID 2936 wrote to memory of 1460	2936	c07240cf31f035624dddc623250edfdf642c36d925c69f8e4c5cd745e08f4fc2.exe	84
PID 2936 wrote to memory of 1460	2936	c07240cf31f035624dddc623250edfdf642c36d925c69f8e4c5cd745e08f4fc2.exe	84
PID 1460 wrote to memory of 2396	1460	u29k.1.exe	90
PID 1460 wrote to memory of 2396	1460	u29k.1.exe	90

C:\Users\Admin\AppData\Local\Temp\c07240cf31f035624dddc623250edfdf642c36d925c69f8e4c5cd745e08f4fc2.exe
"C:\Users\Admin\AppData\Local\Temp\c07240cf31f035624dddc623250edfdf642c36d925c69f8e4c5cd745e08f4fc2.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2936
- C:\Users\Admin\AppData\Local\Temp\u29k.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u29k.0.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3592
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3592 -s 1400
    3⤵
    - Program crash
    PID:4796
- C:\Users\Admin\AppData\Local\Temp\u29k.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u29k.1.exe"
  2⤵
  - Executes dropped EXE
  - Checks SCSI registry key(s)
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:1460
- - 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:2396
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2936 -s 1524
  2⤵
  - Program crash
  PID:4744

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 2936 -ip 2936
1⤵
PID:5096

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 356 -p 3592 -ip 3592
1⤵
PID:3812

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\iolo\dm\ioloDMLog.txt

Filesize
3KB

MD5
24b4ad8d6d075de9ae76cf597a6d6c89

SHA1
921f5d8781c3efd6edfc39ba4a10087b7f4a54cf

SHA256
b790006267c0049bbe3632afefc6357fbe3803bc9df8becb2737d198c88f88c7

SHA512
6b80cecafde26e89a385204f93d4a695fd8454e6190dbd40492acbef8b8737861de1e0ebbefd3b02688f4279db5c7fd7efdef86b91a8aa3427ab7617936a1a4f

Download Submit
C:\Users\Admin\AppData\Local\Temp\u29k.0.exe

Filesize
225KB

MD5
defa7c78ede3a0e93381126de0234328

SHA1
90fbdb299db7e54ed706f20821846622a124e6ff

SHA256
1eb49064f0f461813a0e86abb774d7664272f295a21ca0b5847dcfcf91926a24

SHA512
dfd2ca5e8f403ca0668c7c3e8d34367dec0247a77442906ca265acfa7c08496b81d911a7c9c280b5baab05c7b79d3566dd26912501026f9da26a73354a4a9fc8

Download Submit
C:\Users\Admin\AppData\Local\Temp\u29k.1.exe

Filesize
4.6MB

MD5
397926927bca55be4a77839b1c44de6e

SHA1
e10f3434ef3021c399dbba047832f02b3c898dbd

SHA256
4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

SHA512
cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

Download Submit
memory/1460-64-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/1460-52-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/2396-72-0x00000245C8870000-0x00000245C889A000-memory.dmp

Filesize
168KB

Download
memory/2396-74-0x00000245C88F0000-0x00000245C8940000-memory.dmp

Filesize
320KB

Download
memory/2396-95-0x00000245CD740000-0x00000245CD75E000-memory.dmp

Filesize
120KB

Download
memory/2396-94-0x00000245CD7E0000-0x00000245CD856000-memory.dmp

Filesize
472KB

Download
memory/2396-92-0x00000245CD700000-0x00000245CD70C000-memory.dmp

Filesize
48KB

Download
memory/2396-89-0x00000245CDF50000-0x00000245CE478000-memory.dmp

Filesize
5.2MB

Download
memory/2396-87-0x00000245CD9A0000-0x00000245CDA02000-memory.dmp

Filesize
392KB

Download
memory/2396-88-0x00000245CDA00000-0x00000245CDA22000-memory.dmp

Filesize
136KB

Download
memory/2396-65-0x00000245AA880000-0x00000245AE0B4000-memory.dmp

Filesize
56.2MB

Download
memory/2396-66-0x00000245C8950000-0x00000245C8A5A000-memory.dmp

Filesize
1.0MB

Download
memory/2396-68-0x00000245C8790000-0x00000245C879C000-memory.dmp

Filesize
48KB

Download
memory/2396-67-0x00000245C8770000-0x00000245C8780000-memory.dmp

Filesize
64KB

Download
memory/2396-69-0x00000245C8780000-0x00000245C8794000-memory.dmp

Filesize
80KB

Download
memory/2396-70-0x00000245C87F0000-0x00000245C8814000-memory.dmp

Filesize
144KB

Download
memory/2396-71-0x00000245C8820000-0x00000245C882A000-memory.dmp

Filesize
40KB

Download
memory/2396-86-0x00000245CD980000-0x00000245CD98A000-memory.dmp

Filesize
40KB

Download
memory/2396-73-0x00000245C8BB0000-0x00000245C8C62000-memory.dmp

Filesize
712KB

Download
memory/2396-85-0x00000245CD010000-0x00000245CD018000-memory.dmp

Filesize
32KB

Download
memory/2396-75-0x00000245C8C60000-0x00000245C8C82000-memory.dmp

Filesize
136KB

Download
memory/2396-76-0x00000245C8830000-0x00000245C883A000-memory.dmp

Filesize
40KB

Download
memory/2396-80-0x00000245C8C90000-0x00000245C8F90000-memory.dmp

Filesize
3.0MB

Download
memory/2396-82-0x00000245CC920000-0x00000245CC928000-memory.dmp

Filesize
32KB

Download
memory/2396-83-0x00000245CD030000-0x00000245CD068000-memory.dmp

Filesize
224KB

Download
memory/2396-84-0x00000245CCFF0000-0x00000245CCFFE000-memory.dmp

Filesize
56KB

Download
memory/2936-1-0x0000000001BF0000-0x0000000001CF0000-memory.dmp

Filesize
1024KB

Download
memory/2936-2-0x0000000003740000-0x00000000037AC000-memory.dmp

Filesize
432KB

Download
memory/2936-3-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/2936-33-0x0000000000400000-0x0000000001A26000-memory.dmp

Filesize
22.1MB

Download
memory/2936-34-0x0000000003740000-0x00000000037AC000-memory.dmp

Filesize
432KB

Download
memory/2936-35-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/3592-14-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/3592-13-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/3592-97-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/3592-100-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/3592-102-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/3592-104-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download