stealc | 00c8ad5cf559378352a5026859283bfffee17e56b14a6f96f9fca08efa18ea84

General

Target

00c8ad5cf559378352a5026859283bfffee17e56b14a6f96f9fca08efa18ea84.exe
Size

383KB
MD5

01fe5b410c9d85a5431da8d6c17d6fb3
SHA1

f432252efe31abea1de4982d29a6d0d493dd4474
SHA256

00c8ad5cf559378352a5026859283bfffee17e56b14a6f96f9fca08efa18ea84
SHA512

db24630932f8b14862ac455a0e22d4c44d341e6e0d54aff01875ba506ef8f31237f088806a4756f418ed9f5e405f77de519f99661ced20d393ff0e34422ef7bf
SSDEEP

6144:0wUnEcZwBa7zsNtiNSm4G6GL8yLPRlbxwHzT9L2EJ2iA179uVWQj9eJK2s:tkEMKYd88wP3JAhIjUJK2s

Score

10^/10

stealc zgrat discovery rat spyware stealer

Malware Config

Extracted

Family

stealc

C2

http://185.172.128.150

Attributes

url_path
/c698e1bc8a2f5e6d.php

Signatures

Detect ZGRat V1 3 IoCs

resource	yara_rule
behavioral1/memory/2936-79-0x00000215BAB00000-0x00000215BE334000-memory.dmp	family_zgrat_v1
behavioral1/memory/2936-82-0x00000215D9D50000-0x00000215D9E5A000-memory.dmp	family_zgrat_v1
behavioral1/memory/2936-86-0x00000215D8900000-0x00000215D8924000-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 3 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-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	00c8ad5cf559378352a5026859283bfffee17e56b14a6f96f9fca08efa18ea84.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	u3to.1.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	u3to.0.exe

Executes dropped EXE 2 IoCs

pid	Process
4588	u3to.0.exe
3632	u3to.1.exe

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
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
1040	4956	WerFault.exe	88
1316	4588	WerFault.exe	98

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	u3to.1.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3to.1.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3to.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	u3to.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u3to.0.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2384	timeout.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
4588	u3to.0.exe
4588	u3to.0.exe
2936	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2936	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2936	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2936	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2936	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2936	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2936	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2936	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2936	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2936	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2936	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2936	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2936	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2936	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2936	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2936	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2936	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2936	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2936	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2936	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2936	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2936	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2936	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2936	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2936	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
3632	u3to.1.exe
3632	u3to.1.exe
3632	u3to.1.exe
3632	u3to.1.exe
3632	u3to.1.exe
3632	u3to.1.exe
3632	u3to.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
3632	u3to.1.exe
3632	u3to.1.exe
3632	u3to.1.exe
3632	u3to.1.exe
3632	u3to.1.exe
3632	u3to.1.exe
3632	u3to.1.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4956 wrote to memory of 4588	4956	00c8ad5cf559378352a5026859283bfffee17e56b14a6f96f9fca08efa18ea84.exe	98
PID 4956 wrote to memory of 4588	4956	00c8ad5cf559378352a5026859283bfffee17e56b14a6f96f9fca08efa18ea84.exe	98
PID 4956 wrote to memory of 4588	4956	00c8ad5cf559378352a5026859283bfffee17e56b14a6f96f9fca08efa18ea84.exe	98
PID 4956 wrote to memory of 3632	4956	00c8ad5cf559378352a5026859283bfffee17e56b14a6f96f9fca08efa18ea84.exe	100
PID 4956 wrote to memory of 3632	4956	00c8ad5cf559378352a5026859283bfffee17e56b14a6f96f9fca08efa18ea84.exe	100
PID 4956 wrote to memory of 3632	4956	00c8ad5cf559378352a5026859283bfffee17e56b14a6f96f9fca08efa18ea84.exe	100
PID 3632 wrote to memory of 2936	3632	u3to.1.exe	105
PID 3632 wrote to memory of 2936	3632	u3to.1.exe	105
PID 4588 wrote to memory of 3604	4588	u3to.0.exe	106
PID 4588 wrote to memory of 3604	4588	u3to.0.exe	106
PID 4588 wrote to memory of 3604	4588	u3to.0.exe	106
PID 3604 wrote to memory of 2384	3604	cmd.exe	109
PID 3604 wrote to memory of 2384	3604	cmd.exe	109
PID 3604 wrote to memory of 2384	3604	cmd.exe	109

C:\Users\Admin\AppData\Local\Temp\00c8ad5cf559378352a5026859283bfffee17e56b14a6f96f9fca08efa18ea84.exe
"C:\Users\Admin\AppData\Local\Temp\00c8ad5cf559378352a5026859283bfffee17e56b14a6f96f9fca08efa18ea84.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4956
- C:\Users\Admin\AppData\Local\Temp\u3to.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u3to.0.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4588
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\u3to.0.exe" & del "C:\ProgramData\*.dll"" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3604
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 5
      4⤵
      Delays execution with timeout.exe
      PID:2384
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4588 -s 1500
    3⤵
    - Program crash
    PID:1316
- C:\Users\Admin\AppData\Local\Temp\u3to.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u3to.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:3632
- - 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:2936
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4956 -s 1528
  2⤵
  - Program crash
  PID:1040

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 --field-trial-handle=3888,i,13640054265074968359,8146127767143474550,262144 --variations-seed-version --mojo-platform-channel-handle=3812 /prefetch:8
1⤵
PID:2704

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4956 -ip 4956
1⤵
PID:4280

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 4588 -ip 4588
1⤵
PID:1700

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

4

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\iolo\dm\ioloDMLog.txt

Filesize
3KB

MD5
ad2c1ca776db0f00eafee742e5a5b866

SHA1
53208463b5d70c6fc25037e525a6a1ad0c8edfff

SHA256
ebf2df1539de0958e443b3322b4fcab6401817d83dfbdfaceda36ddf81067136

SHA512
95efdc0c371a1ea3cccc195f7efd8704ffa655192efce56d7134727dbd5a0ee7802999617b9ebb22fa64133f7b76f7e249f1bc74b2b0b81ea864e8ea538896de

Download Submit
C:\Users\Admin\AppData\Local\Temp\u3to.0.exe

Filesize
241KB

MD5
e3db79a0448215d54ea4f136c9822163

SHA1
04a87613c74443f0c16b29ebe632535ff9acfb86

SHA256
e21b32533e7bef276e6917f5e4ae6c7eceff24dcd7867b4ab88de41749dc2951

SHA512
91db4c51a35bc14d0237a5df6b9f7e1439396358c5b87eb5db280d02ab5e8de6a656f11e4abc667bdeb66d7d51b913377671d3d51471c502bc3b9ac918905b4f

Download Submit
C:\Users\Admin\AppData\Local\Temp\u3to.1.exe

Filesize
4.6MB

MD5
397926927bca55be4a77839b1c44de6e

SHA1
e10f3434ef3021c399dbba047832f02b3c898dbd

SHA256
4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

SHA512
cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

Download Submit
memory/2936-85-0x00000215D8890000-0x00000215D88A4000-memory.dmp

Filesize
80KB

Download
memory/2936-102-0x00000215DF520000-0x00000215DF52A000-memory.dmp

Filesize
40KB

Download
memory/2936-110-0x00000215DA390000-0x00000215DA3AE000-memory.dmp

Filesize
120KB

Download
memory/2936-87-0x00000215D8920000-0x00000215D892A000-memory.dmp

Filesize
40KB

Download
memory/2936-86-0x00000215D8900000-0x00000215D8924000-memory.dmp

Filesize
144KB

Download
memory/2936-89-0x00000215D9B70000-0x00000215D9C22000-memory.dmp

Filesize
712KB

Download
memory/2936-108-0x00000215DF2A0000-0x00000215DF2AC000-memory.dmp

Filesize
48KB

Download
memory/2936-105-0x00000215DFAF0000-0x00000215E0018000-memory.dmp

Filesize
5.2MB

Download
memory/2936-104-0x00000215DF5A0000-0x00000215DF5C2000-memory.dmp

Filesize
136KB

Download
memory/2936-103-0x00000215DF540000-0x00000215DF5A2000-memory.dmp

Filesize
392KB

Download
memory/2936-79-0x00000215BAB00000-0x00000215BE334000-memory.dmp

Filesize
56.2MB

Download
memory/2936-98-0x00000215DEA70000-0x00000215DEA78000-memory.dmp

Filesize
32KB

Download
memory/2936-82-0x00000215D9D50000-0x00000215D9E5A000-memory.dmp

Filesize
1.0MB

Download
memory/2936-83-0x00000215D8880000-0x00000215D8890000-memory.dmp

Filesize
64KB

Download
memory/2936-84-0x00000215D88A0000-0x00000215D88AC000-memory.dmp

Filesize
48KB

Download
memory/2936-101-0x00000215DE3A0000-0x00000215DE3A8000-memory.dmp

Filesize
32KB

Download
memory/2936-109-0x00000215DA430000-0x00000215DA4A6000-memory.dmp

Filesize
472KB

Download
memory/2936-100-0x00000215DE380000-0x00000215DE38E000-memory.dmp

Filesize
56KB

Download
memory/2936-99-0x00000215DE3B0000-0x00000215DE3E8000-memory.dmp

Filesize
224KB

Download
memory/2936-88-0x00000215D8950000-0x00000215D897A000-memory.dmp

Filesize
168KB

Download
memory/2936-90-0x00000215D9FF0000-0x00000215DA040000-memory.dmp

Filesize
320KB

Download
memory/2936-91-0x00000215DA040000-0x00000215DA062000-memory.dmp

Filesize
136KB

Download
memory/2936-92-0x00000215D8930000-0x00000215D893A000-memory.dmp

Filesize
40KB

Download
memory/2936-96-0x00000215DA070000-0x00000215DA370000-memory.dmp

Filesize
3.0MB

Download
memory/3632-78-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/3632-53-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/4588-81-0x0000000000400000-0x0000000002AFA000-memory.dmp

Filesize
39.0MB

Download
memory/4588-66-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/4588-63-0x0000000000400000-0x0000000002AFA000-memory.dmp

Filesize
39.0MB

Download
memory/4956-37-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/4956-1-0x0000000002BE0000-0x0000000002CE0000-memory.dmp

Filesize
1024KB

Download
memory/4956-2-0x0000000002DB0000-0x0000000002E1C000-memory.dmp

Filesize
432KB

Download
memory/4956-3-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/4956-36-0x0000000000400000-0x0000000002B1D000-memory.dmp

Filesize
39.1MB

Download
memory/4956-24-0x0000000000400000-0x0000000002B1D000-memory.dmp

Filesize
39.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads