stealc | 37438fb048680fd349441ff5d80f17caeab6aaef887021be61a96879d7d54865

Analysis

max time kernel
133s
max time network
125s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
08-05-2024 05:01

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General

Target

37438fb048680fd349441ff5d80f17caeab6aaef887021be61a96879d7d54865.exe
Size

367KB
MD5

0859de3bc56bdaaa5fe2802115a52912
SHA1

5b74514ba9d33ac666be8f1810c7606734577898
SHA256

37438fb048680fd349441ff5d80f17caeab6aaef887021be61a96879d7d54865
SHA512

25d57c4c245de9b8774676cae2aac2871d8dff96467b2ef0788608011a5dd16a8594d84c167956631acc438c4b53a3542c1ecdea22a0a9f34659508499250507
SSDEEP

6144:GM2eTWsqArSaDRacri00TwSZJtVXZZkJPHloB7DmGxHOs+V4iPTiBs:vbTbqAeMRFr2wU/VXZZkxOmAHOd4iiBs

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/1012-65-0x000001EE42200000-0x000001EE45A34000-memory.dmp	family_zgrat_v1
behavioral1/memory/1012-66-0x000001EE60340000-0x000001EE6044A000-memory.dmp	family_zgrat_v1
behavioral1/memory/1012-70-0x000001EE476F0000-0x000001EE47714000-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-1-5-21-17203666-93769886-2545153620-1000\Control Panel\International\Geo\Nation	37438fb048680fd349441ff5d80f17caeab6aaef887021be61a96879d7d54865.exe
Key value queried	\REGISTRY\USER\S-1-5-21-17203666-93769886-2545153620-1000\Control Panel\International\Geo\Nation	u3o8.1.exe

Executes dropped EXE 2 IoCs

pid	Process
1052	u3o8.0.exe
372	u3o8.1.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
4928	4760	WerFault.exe	82
4936	1052	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	u3o8.1.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3o8.1.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3o8.1.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	u3o8.0.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	u3o8.0.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
1012	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1012	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1012	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1012	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1012	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1012	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1012	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1012	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1012	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1012	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1012	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1012	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1012	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1012	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1012	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1012	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1012	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1012	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1012	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1012	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1012	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1012	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1012	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1012	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1052	u3o8.0.exe
1052	u3o8.0.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1012	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
372	u3o8.1.exe
372	u3o8.1.exe
372	u3o8.1.exe
372	u3o8.1.exe
372	u3o8.1.exe
372	u3o8.1.exe
372	u3o8.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
372	u3o8.1.exe
372	u3o8.1.exe
372	u3o8.1.exe
372	u3o8.1.exe
372	u3o8.1.exe
372	u3o8.1.exe
372	u3o8.1.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4760 wrote to memory of 1052	4760	37438fb048680fd349441ff5d80f17caeab6aaef887021be61a96879d7d54865.exe	92
PID 4760 wrote to memory of 1052	4760	37438fb048680fd349441ff5d80f17caeab6aaef887021be61a96879d7d54865.exe	92
PID 4760 wrote to memory of 1052	4760	37438fb048680fd349441ff5d80f17caeab6aaef887021be61a96879d7d54865.exe	92
PID 4760 wrote to memory of 372	4760	37438fb048680fd349441ff5d80f17caeab6aaef887021be61a96879d7d54865.exe	95
PID 4760 wrote to memory of 372	4760	37438fb048680fd349441ff5d80f17caeab6aaef887021be61a96879d7d54865.exe	95
PID 4760 wrote to memory of 372	4760	37438fb048680fd349441ff5d80f17caeab6aaef887021be61a96879d7d54865.exe	95
PID 372 wrote to memory of 1012	372	u3o8.1.exe	103
PID 372 wrote to memory of 1012	372	u3o8.1.exe	103

C:\Users\Admin\AppData\Local\Temp\37438fb048680fd349441ff5d80f17caeab6aaef887021be61a96879d7d54865.exe
"C:\Users\Admin\AppData\Local\Temp\37438fb048680fd349441ff5d80f17caeab6aaef887021be61a96879d7d54865.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4760
- C:\Users\Admin\AppData\Local\Temp\u3o8.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u3o8.0.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:1052
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1052 -s 1300
    3⤵
    - Program crash
    PID:4936
- C:\Users\Admin\AppData\Local\Temp\u3o8.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u3o8.1.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:372
- - 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:1012
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4760 -s 1528
  2⤵
  - Program crash
  PID:4928

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4760 -ip 4760
1⤵
PID:4340

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 1052 -ip 1052
1⤵
PID:920

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\iolo\dm\ioloDMLog.txt

Filesize
3KB

MD5
66be05d16873f51ec938795f79c6115e

SHA1
da31d96d7bd369ab6527fa6a60036f4aefa02e21

SHA256
8f06ecf908775751df3fef924d09383f789404b0a6bf4488b6d2e9301de51c46

SHA512
c1af166a44644c8f7b7174d28a0616e60487e2803861db2af87cb4380a34400c04c840c1e3301c827b990e8e2d2d1a5c5848ed9912897e0541dc44e7751bf4ed

Download Submit
C:\Users\Admin\AppData\Local\Temp\u3o8.0.exe

Filesize
225KB

MD5
defa7c78ede3a0e93381126de0234328

SHA1
90fbdb299db7e54ed706f20821846622a124e6ff

SHA256
1eb49064f0f461813a0e86abb774d7664272f295a21ca0b5847dcfcf91926a24

SHA512
dfd2ca5e8f403ca0668c7c3e8d34367dec0247a77442906ca265acfa7c08496b81d911a7c9c280b5baab05c7b79d3566dd26912501026f9da26a73354a4a9fc8

Download Submit
C:\Users\Admin\AppData\Local\Temp\u3o8.1.exe

Filesize
4.6MB

MD5
397926927bca55be4a77839b1c44de6e

SHA1
e10f3434ef3021c399dbba047832f02b3c898dbd

SHA256
4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

SHA512
cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

Download Submit
memory/372-64-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/372-53-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/1012-71-0x000001EE47710000-0x000001EE4771A000-memory.dmp

Filesize
40KB

Download
memory/1012-75-0x000001EE60300000-0x000001EE60322000-memory.dmp

Filesize
136KB

Download
memory/1012-94-0x000001EE65900000-0x000001EE6591E000-memory.dmp

Filesize
120KB

Download
memory/1012-93-0x000001EE659A0000-0x000001EE65A16000-memory.dmp

Filesize
472KB

Download
memory/1012-92-0x000001EE658C0000-0x000001EE658CC000-memory.dmp

Filesize
48KB

Download
memory/1012-89-0x000001EE66110000-0x000001EE66638000-memory.dmp

Filesize
5.2MB

Download
memory/1012-88-0x000001EE65BC0000-0x000001EE65BE2000-memory.dmp

Filesize
136KB

Download
memory/1012-87-0x000001EE65B60000-0x000001EE65BC2000-memory.dmp

Filesize
392KB

Download
memory/1012-86-0x000001EE65B40000-0x000001EE65B4A000-memory.dmp

Filesize
40KB

Download
memory/1012-65-0x000001EE42200000-0x000001EE45A34000-memory.dmp

Filesize
56.2MB

Download
memory/1012-66-0x000001EE60340000-0x000001EE6044A000-memory.dmp

Filesize
1.0MB

Download
memory/1012-67-0x000001EE47680000-0x000001EE47690000-memory.dmp

Filesize
64KB

Download
memory/1012-68-0x000001EE476A0000-0x000001EE476AC000-memory.dmp

Filesize
48KB

Download
memory/1012-69-0x000001EE47690000-0x000001EE476A4000-memory.dmp

Filesize
80KB

Download
memory/1012-70-0x000001EE476F0000-0x000001EE47714000-memory.dmp

Filesize
144KB

Download
memory/1012-85-0x000001EE649D0000-0x000001EE649D8000-memory.dmp

Filesize
32KB

Download
memory/1012-72-0x000001EE60080000-0x000001EE600AA000-memory.dmp

Filesize
168KB

Download
memory/1012-73-0x000001EE60590000-0x000001EE60642000-memory.dmp

Filesize
712KB

Download
memory/1012-74-0x000001EE60640000-0x000001EE60690000-memory.dmp

Filesize
320KB

Download
memory/1012-84-0x000001EE649B0000-0x000001EE649BE000-memory.dmp

Filesize
56KB

Download
memory/1012-76-0x000001EE47720000-0x000001EE4772A000-memory.dmp

Filesize
40KB

Download
memory/1012-80-0x000001EE60690000-0x000001EE60990000-memory.dmp

Filesize
3.0MB

Download
memory/1012-82-0x000001EE642E0000-0x000001EE642E8000-memory.dmp

Filesize
32KB

Download
memory/1012-83-0x000001EE649E0000-0x000001EE64A18000-memory.dmp

Filesize
224KB

Download
memory/1052-98-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/1052-104-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/1052-102-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/1052-14-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/1052-52-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/1052-13-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/1052-100-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/4760-3-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/4760-34-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/4760-35-0x00000000036B0000-0x000000000371C000-memory.dmp

Filesize
432KB

Download
memory/4760-33-0x0000000000400000-0x0000000001A26000-memory.dmp

Filesize
22.1MB

Download
memory/4760-2-0x00000000036B0000-0x000000000371C000-memory.dmp

Filesize
432KB

Download
memory/4760-1-0x0000000001C10000-0x0000000001D10000-memory.dmp

Filesize
1024KB

Download