stealc | 400cb48c8d22a69febceb65d8be4a632aa376232257372e4555d8a2c6236c99f

Analysis

max time kernel
136s
max time network
138s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
09/05/2024, 00:00

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General

Target

400cb48c8d22a69febceb65d8be4a632aa376232257372e4555d8a2c6236c99f.exe
Size

364KB
MD5

6b088264e25fdf73a516a0797b665971
SHA1

622fdd113c160002b159ad777d53e05348fa2763
SHA256

400cb48c8d22a69febceb65d8be4a632aa376232257372e4555d8a2c6236c99f
SHA512

1e26b0a6cdc86259584f702ba7039d901c04c428f51ea031a3b39ecefe5d26768ae2d06416af15561fdb737430a5623a86eece37e0ebd3610bdc4dea57609e5e
SSDEEP

6144:aEToWW+sKejNKsTbTpfSl2JyRVc6TI2DNJeTNPcOlE/r1EHSRKYTpWM:awot+LKwy/pfSl2Jy7fTPNopJya6tpWM

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/1796-67-0x000001864B4E0000-0x000001864ED14000-memory.dmp	family_zgrat_v1
behavioral1/memory/1796-68-0x000001866AD30000-0x000001866AE3A000-memory.dmp	family_zgrat_v1
behavioral1/memory/1796-72-0x0000018650B30000-0x0000018650B54000-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-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	400cb48c8d22a69febceb65d8be4a632aa376232257372e4555d8a2c6236c99f.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	u1w4.1.exe

Executes dropped EXE 2 IoCs

pid	Process
3664	u1w4.0.exe
4936	u1w4.1.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
2848	2452	WerFault.exe	77
2180	3664	WerFault.exe	78

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	u1w4.1.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u1w4.1.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u1w4.1.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	u1w4.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u1w4.0.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
1796	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1796	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1796	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1796	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1796	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1796	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1796	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1796	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1796	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1796	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1796	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1796	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1796	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1796	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1796	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1796	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1796	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1796	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1796	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3664	u1w4.0.exe
3664	u1w4.0.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1796	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
4936	u1w4.1.exe
4936	u1w4.1.exe
4936	u1w4.1.exe
4936	u1w4.1.exe
4936	u1w4.1.exe
4936	u1w4.1.exe
4936	u1w4.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
4936	u1w4.1.exe
4936	u1w4.1.exe
4936	u1w4.1.exe
4936	u1w4.1.exe
4936	u1w4.1.exe
4936	u1w4.1.exe
4936	u1w4.1.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2452 wrote to memory of 3664	2452	400cb48c8d22a69febceb65d8be4a632aa376232257372e4555d8a2c6236c99f.exe	78
PID 2452 wrote to memory of 3664	2452	400cb48c8d22a69febceb65d8be4a632aa376232257372e4555d8a2c6236c99f.exe	78
PID 2452 wrote to memory of 3664	2452	400cb48c8d22a69febceb65d8be4a632aa376232257372e4555d8a2c6236c99f.exe	78
PID 2452 wrote to memory of 4936	2452	400cb48c8d22a69febceb65d8be4a632aa376232257372e4555d8a2c6236c99f.exe	80
PID 2452 wrote to memory of 4936	2452	400cb48c8d22a69febceb65d8be4a632aa376232257372e4555d8a2c6236c99f.exe	80
PID 2452 wrote to memory of 4936	2452	400cb48c8d22a69febceb65d8be4a632aa376232257372e4555d8a2c6236c99f.exe	80
PID 4936 wrote to memory of 1796	4936	u1w4.1.exe	85
PID 4936 wrote to memory of 1796	4936	u1w4.1.exe	85

C:\Users\Admin\AppData\Local\Temp\400cb48c8d22a69febceb65d8be4a632aa376232257372e4555d8a2c6236c99f.exe
"C:\Users\Admin\AppData\Local\Temp\400cb48c8d22a69febceb65d8be4a632aa376232257372e4555d8a2c6236c99f.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2452
- C:\Users\Admin\AppData\Local\Temp\u1w4.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u1w4.0.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3664
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3664 -s 1324
    3⤵
    - Program crash
    PID:2180
- C:\Users\Admin\AppData\Local\Temp\u1w4.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u1w4.1.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:4936
- - 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:1796
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2452 -s 860
  2⤵
  - Program crash
  PID:2848

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 2452 -ip 2452
1⤵
PID:3956

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 568 -p 3664 -ip 3664
1⤵
PID:1076

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
77966111ff650d1fb4c03ea48c3b9045

SHA1
3a200b917ad4b0bc26b8b50185312a5266389bbe

SHA256
b8ea05d89129e98a40630bf86e6a75c614c6208340f8495dba36bc881e5211d1

SHA512
4e6afd47992f05b7e37b8dd849300c3275daf02c22a130f592df0178c6a671b7f42033979f44ce324577e9cf6beff941a1b39a2287eadd51c8d4e68bff087293

Download Submit
C:\Users\Admin\AppData\Local\Temp\u1w4.0.exe

Filesize
223KB

MD5
816cbc57fc20eb01645497ed35bdeb19

SHA1
3222b725c5031a12b310ef8c1b8bb120b345c80e

SHA256
c15c3a1a771770d1f3a838cdb6d0fcffea562e42d118b37087dd6022fff13c53

SHA512
2bf23ac407844682107c68705e0ac072d7a8767f0c9a8c2bb913cc394e6c85bd22a7024c5253130f4a5b26a083e9518f2d4f21b775da6d2812ab808587aa399e

Download Submit
C:\Users\Admin\AppData\Local\Temp\u1w4.1.exe

Filesize
4.6MB

MD5
397926927bca55be4a77839b1c44de6e

SHA1
e10f3434ef3021c399dbba047832f02b3c898dbd

SHA256
4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

SHA512
cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

Download Submit
memory/1796-78-0x000001866ABC0000-0x000001866ABE2000-memory.dmp

Filesize
136KB

Download
memory/1796-79-0x0000018650B50000-0x0000018650B5A000-memory.dmp

Filesize
40KB

Download
memory/1796-96-0x0000018670390000-0x0000018670406000-memory.dmp

Filesize
472KB

Download
memory/1796-95-0x00000186702B0000-0x00000186702BC000-memory.dmp

Filesize
48KB

Download
memory/1796-89-0x0000018670530000-0x000001867053A000-memory.dmp

Filesize
40KB

Download
memory/1796-88-0x000001866F3B0000-0x000001866F3B8000-memory.dmp

Filesize
32KB

Download
memory/1796-87-0x000001866F390000-0x000001866F39E000-memory.dmp

Filesize
56KB

Download
memory/1796-92-0x0000018670B00000-0x0000018671028000-memory.dmp

Filesize
5.2MB

Download
memory/1796-86-0x000001866F3C0000-0x000001866F3F8000-memory.dmp

Filesize
224KB

Download
memory/1796-91-0x00000186705B0000-0x00000186705D2000-memory.dmp

Filesize
136KB

Download
memory/1796-67-0x000001864B4E0000-0x000001864ED14000-memory.dmp

Filesize
56.2MB

Download
memory/1796-68-0x000001866AD30000-0x000001866AE3A000-memory.dmp

Filesize
1.0MB

Download
memory/1796-69-0x0000018650AA0000-0x0000018650AB0000-memory.dmp

Filesize
64KB

Download
memory/1796-70-0x0000018650AC0000-0x0000018650ACC000-memory.dmp

Filesize
48KB

Download
memory/1796-98-0x00000186702F0000-0x000001867030E000-memory.dmp

Filesize
120KB

Download
memory/1796-74-0x000001866AB60000-0x000001866AB8A000-memory.dmp

Filesize
168KB

Download
memory/1796-71-0x0000018650AB0000-0x0000018650AC4000-memory.dmp

Filesize
80KB

Download
memory/1796-85-0x000001866FA80000-0x000001866FA88000-memory.dmp

Filesize
32KB

Download
memory/1796-75-0x000001866AF80000-0x000001866B032000-memory.dmp

Filesize
712KB

Download
memory/1796-72-0x0000018650B30000-0x0000018650B54000-memory.dmp

Filesize
144KB

Download
memory/1796-77-0x000001866B030000-0x000001866B080000-memory.dmp

Filesize
320KB

Download
memory/1796-90-0x0000018670550000-0x00000186705B2000-memory.dmp

Filesize
392KB

Download
memory/1796-73-0x0000018650AD0000-0x0000018650ADA000-memory.dmp

Filesize
40KB

Download
memory/1796-83-0x000001866B080000-0x000001866B380000-memory.dmp

Filesize
3.0MB

Download
memory/2452-2-0x00000000041B0000-0x000000000421C000-memory.dmp

Filesize
432KB

Download
memory/2452-3-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/2452-37-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/2452-29-0x0000000000400000-0x0000000002597000-memory.dmp

Filesize
33.6MB

Download
memory/2452-1-0x0000000002600000-0x0000000002700000-memory.dmp

Filesize
1024KB

Download
memory/3664-76-0x0000000000400000-0x0000000002574000-memory.dmp

Filesize
33.5MB

Download
memory/3664-15-0x0000000000400000-0x0000000002574000-memory.dmp

Filesize
33.5MB

Download
memory/3664-14-0x0000000000400000-0x0000000002574000-memory.dmp

Filesize
33.5MB

Download
memory/3664-13-0x0000000000400000-0x0000000002574000-memory.dmp

Filesize
33.5MB

Download
memory/3664-101-0x0000000000400000-0x0000000002574000-memory.dmp

Filesize
33.5MB

Download
memory/3664-103-0x0000000000400000-0x0000000002574000-memory.dmp

Filesize
33.5MB

Download
memory/3664-105-0x0000000000400000-0x0000000002574000-memory.dmp

Filesize
33.5MB

Download
memory/4936-66-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/4936-53-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download