stealc | 3253f3a1d89d7a6045be304e5fb4399349d6cc4cf5cea222609102fc5286d1b2

Analysis

max time kernel
142s
max time network
133s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
08-05-2024 13:08

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General

Target

3253f3a1d89d7a6045be304e5fb4399349d6cc4cf5cea222609102fc5286d1b2.exe
Size

368KB
MD5

2665e1f4bf687584b428e6563a59a852
SHA1

6f665dea0cb0032f821341eeda2a8523dafc90cf
SHA256

3253f3a1d89d7a6045be304e5fb4399349d6cc4cf5cea222609102fc5286d1b2
SHA512

a43950b8e00e482597d4bcf90041d94530868967994121386b3dfc8f4c83badafab0de0c5f3aa9971432e4bd8fea3c3beba53c9eabc39a204929842b09523a40
SSDEEP

6144:/jRhVhZVNlrECRfaajfnwdgcXlzbrp5nkaALQf4jTfec:lrLNrEWCazK3XFh5vALQUfec

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/1744-72-0x000001BA51530000-0x000001BA54D64000-memory.dmp	family_zgrat_v1
behavioral1/memory/1744-78-0x000001BA6F250000-0x000001BA6F274000-memory.dmp	family_zgrat_v1
behavioral1/memory/1744-74-0x000001BA70500000-0x000001BA7060A000-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-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	3253f3a1d89d7a6045be304e5fb4399349d6cc4cf5cea222609102fc5286d1b2.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	u21w.1.exe

Executes dropped EXE 2 IoCs

pid	Process
3968	u21w.0.exe
1716	u21w.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
1140	2660	WerFault.exe	82
744	3968	WerFault.exe	90

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	u21w.1.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u21w.1.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u21w.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	u21w.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u21w.0.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
1744	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1744	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1744	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1744	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1744	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1744	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1744	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1744	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1744	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1744	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1744	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1744	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1744	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1744	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1744	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1744	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1744	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1744	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1744	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1744	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1744	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1744	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1744	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3968	u21w.0.exe
3968	u21w.0.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1744	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
1716	u21w.1.exe
1716	u21w.1.exe
1716	u21w.1.exe
1716	u21w.1.exe
1716	u21w.1.exe
1716	u21w.1.exe
1716	u21w.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
1716	u21w.1.exe
1716	u21w.1.exe
1716	u21w.1.exe
1716	u21w.1.exe
1716	u21w.1.exe
1716	u21w.1.exe
1716	u21w.1.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2660 wrote to memory of 3968	2660	3253f3a1d89d7a6045be304e5fb4399349d6cc4cf5cea222609102fc5286d1b2.exe	90
PID 2660 wrote to memory of 3968	2660	3253f3a1d89d7a6045be304e5fb4399349d6cc4cf5cea222609102fc5286d1b2.exe	90
PID 2660 wrote to memory of 3968	2660	3253f3a1d89d7a6045be304e5fb4399349d6cc4cf5cea222609102fc5286d1b2.exe	90
PID 2660 wrote to memory of 1716	2660	3253f3a1d89d7a6045be304e5fb4399349d6cc4cf5cea222609102fc5286d1b2.exe	95
PID 2660 wrote to memory of 1716	2660	3253f3a1d89d7a6045be304e5fb4399349d6cc4cf5cea222609102fc5286d1b2.exe	95
PID 2660 wrote to memory of 1716	2660	3253f3a1d89d7a6045be304e5fb4399349d6cc4cf5cea222609102fc5286d1b2.exe	95
PID 1716 wrote to memory of 1744	1716	u21w.1.exe	102
PID 1716 wrote to memory of 1744	1716	u21w.1.exe	102

C:\Users\Admin\AppData\Local\Temp\3253f3a1d89d7a6045be304e5fb4399349d6cc4cf5cea222609102fc5286d1b2.exe
"C:\Users\Admin\AppData\Local\Temp\3253f3a1d89d7a6045be304e5fb4399349d6cc4cf5cea222609102fc5286d1b2.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2660
- C:\Users\Admin\AppData\Local\Temp\u21w.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u21w.0.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3968
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3968 -s 1088
    3⤵
    - Program crash
    PID:744
- C:\Users\Admin\AppData\Local\Temp\u21w.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u21w.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:1716
- - 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:1744
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2660 -s 1144
  2⤵
  - Program crash
  PID:1140

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 2660 -ip 2660
1⤵
PID:2168

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 3968 -ip 3968
1⤵
PID:3852

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
f95997bafd0b158ccd0521f6c9a6a28a

SHA1
f260696e6522f09c6be4a99d3a2eb7e38e9c256e

SHA256
e6be5e918c2648adeb5c9281a96d96521cfb334265a03501e2815e28cff20955

SHA512
8e2c9c27113a42b86ba3cdd072d61772c1ec52439bba29f3bf475bae121573db79084c74bef2d714e0a678d383d310156051514f971dc2b3da0246e9796d1ccc

Download Submit
C:\Users\Admin\AppData\Local\Temp\u21w.0.exe

Filesize
226KB

MD5
c4b38f17b16a0b545d989a5e7f192308

SHA1
7325ba75f76855f332e840d595cadc591ea220af

SHA256
45072f942cb27587d1815a9c079c066c85ac313fe1388fd61dd69c77bdc68b4b

SHA512
ca30aa925c6bec667fa4aceda9918d9e7c1ddee1fb7eded4ee266f6f6ae2d3e2fea7070049dc28540615832fc2e60e2821aabc839f468d446b44e082558ef041

Download Submit
C:\Users\Admin\AppData\Local\Temp\u21w.1.exe

Filesize
4.6MB

MD5
397926927bca55be4a77839b1c44de6e

SHA1
e10f3434ef3021c399dbba047832f02b3c898dbd

SHA256
4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

SHA512
cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

Download Submit
memory/1716-71-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/1716-56-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/1744-91-0x000001BA74B60000-0x000001BA74B98000-memory.dmp

Filesize
224KB

Download
memory/1744-90-0x000001BA75220000-0x000001BA75228000-memory.dmp

Filesize
32KB

Download
memory/1744-102-0x000001BA75DA0000-0x000001BA75DBE000-memory.dmp

Filesize
120KB

Download
memory/1744-101-0x000001BA75E40000-0x000001BA75EB6000-memory.dmp

Filesize
472KB

Download
memory/1744-100-0x000001BA75A70000-0x000001BA75A7C000-memory.dmp

Filesize
48KB

Download
memory/1744-97-0x000001BA762A0000-0x000001BA767C8000-memory.dmp

Filesize
5.2MB

Download
memory/1744-94-0x000001BA75A40000-0x000001BA75A4A000-memory.dmp

Filesize
40KB

Download
memory/1744-95-0x000001BA75D10000-0x000001BA75D72000-memory.dmp

Filesize
392KB

Download
memory/1744-96-0x000001BA75A50000-0x000001BA75A72000-memory.dmp

Filesize
136KB

Download
memory/1744-92-0x000001BA74B30000-0x000001BA74B3E000-memory.dmp

Filesize
56KB

Download
memory/1744-93-0x000001BA74B50000-0x000001BA74B58000-memory.dmp

Filesize
32KB

Download
memory/1744-88-0x000001BA70820000-0x000001BA70B20000-memory.dmp

Filesize
3.0MB

Download
memory/1744-72-0x000001BA51530000-0x000001BA54D64000-memory.dmp

Filesize
56.2MB

Download
memory/1744-76-0x000001BA6F1E0000-0x000001BA6F1EC000-memory.dmp

Filesize
48KB

Download
memory/1744-78-0x000001BA6F250000-0x000001BA6F274000-memory.dmp

Filesize
144KB

Download
memory/1744-77-0x000001BA6F1D0000-0x000001BA6F1E4000-memory.dmp

Filesize
80KB

Download
memory/1744-75-0x000001BA6F1C0000-0x000001BA6F1D0000-memory.dmp

Filesize
64KB

Download
memory/1744-74-0x000001BA70500000-0x000001BA7060A000-memory.dmp

Filesize
1.0MB

Download
memory/1744-82-0x000001BA707A0000-0x000001BA707F0000-memory.dmp

Filesize
320KB

Download
memory/1744-83-0x000001BA707F0000-0x000001BA70812000-memory.dmp

Filesize
136KB

Download
memory/1744-81-0x000001BA70440000-0x000001BA704F2000-memory.dmp

Filesize
712KB

Download
memory/1744-80-0x000001BA6F280000-0x000001BA6F2AA000-memory.dmp

Filesize
168KB

Download
memory/1744-79-0x000001BA6F1F0000-0x000001BA6F1FA000-memory.dmp

Filesize
40KB

Download
memory/1744-84-0x000001BA6F270000-0x000001BA6F27A000-memory.dmp

Filesize
40KB

Download
memory/2660-3-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/2660-35-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/2660-16-0x0000000000400000-0x0000000001A26000-memory.dmp

Filesize
22.1MB

Download
memory/2660-31-0x0000000001B20000-0x0000000001C20000-memory.dmp

Filesize
1024KB

Download
memory/2660-1-0x0000000001B20000-0x0000000001C20000-memory.dmp

Filesize
1024KB

Download
memory/2660-34-0x0000000003690000-0x00000000036FC000-memory.dmp

Filesize
432KB

Download
memory/2660-33-0x0000000000400000-0x0000000001A26000-memory.dmp

Filesize
22.1MB

Download
memory/2660-2-0x0000000003690000-0x00000000036FC000-memory.dmp

Filesize
432KB

Download
memory/3968-13-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/3968-57-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/3968-14-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/3968-15-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/3968-104-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/3968-106-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/3968-108-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download