stealc | b883b97b17450a10f95eba96de2c9921b2527d5ff6948a61a6147c94bd023fe6

Analysis

max time kernel
146s
max time network
151s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
09/05/2024, 00:01

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General

Target

b883b97b17450a10f95eba96de2c9921b2527d5ff6948a61a6147c94bd023fe6.exe
Size

364KB
MD5

17ae1a58d1a582890ef6f3eb8c2936fe
SHA1

cddf7c81e45fdec83cb81dca6faff0bdc5cb5661
SHA256

b883b97b17450a10f95eba96de2c9921b2527d5ff6948a61a6147c94bd023fe6
SHA512

6e7da090a92470421a623303b66a2d5b2577ecb755e7cf8283511b04d79dde9af1375df245cb4da69f94b2a971f839d734e21b6b07e962dfadd50af8ac4db41d
SSDEEP

6144:aEToWW+sKejNKsTbTpfSl2JyRVc6TI2DNJeTNPcOlE/r1EHSRKYTpWI:awot+LKwy/pfSl2Jy7fTPNopJya6tpWI

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/3008-67-0x000001FAA75D0000-0x000001FAAAE04000-memory.dmp	family_zgrat_v1
behavioral2/memory/3008-68-0x000001FAC5700000-0x000001FAC580A000-memory.dmp	family_zgrat_v1
behavioral2/memory/3008-72-0x000001FAACC40000-0x000001FAACC64000-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
2368	u3uk.0.exe
1896	u3uk.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
2640	4988	WerFault.exe	79
3660	2368	WerFault.exe	80

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	u3uk.1.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3uk.1.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3uk.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	u3uk.0.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	u3uk.0.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
3008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2368	u3uk.0.exe
2368	u3uk.0.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
1896	u3uk.1.exe
1896	u3uk.1.exe
1896	u3uk.1.exe
1896	u3uk.1.exe
1896	u3uk.1.exe
1896	u3uk.1.exe
1896	u3uk.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
1896	u3uk.1.exe
1896	u3uk.1.exe
1896	u3uk.1.exe
1896	u3uk.1.exe
1896	u3uk.1.exe
1896	u3uk.1.exe
1896	u3uk.1.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4988 wrote to memory of 2368	4988	b883b97b17450a10f95eba96de2c9921b2527d5ff6948a61a6147c94bd023fe6.exe	80
PID 4988 wrote to memory of 2368	4988	b883b97b17450a10f95eba96de2c9921b2527d5ff6948a61a6147c94bd023fe6.exe	80
PID 4988 wrote to memory of 2368	4988	b883b97b17450a10f95eba96de2c9921b2527d5ff6948a61a6147c94bd023fe6.exe	80
PID 4988 wrote to memory of 1896	4988	b883b97b17450a10f95eba96de2c9921b2527d5ff6948a61a6147c94bd023fe6.exe	83
PID 4988 wrote to memory of 1896	4988	b883b97b17450a10f95eba96de2c9921b2527d5ff6948a61a6147c94bd023fe6.exe	83
PID 4988 wrote to memory of 1896	4988	b883b97b17450a10f95eba96de2c9921b2527d5ff6948a61a6147c94bd023fe6.exe	83
PID 1896 wrote to memory of 3008	1896	u3uk.1.exe	88
PID 1896 wrote to memory of 3008	1896	u3uk.1.exe	88

C:\Users\Admin\AppData\Local\Temp\b883b97b17450a10f95eba96de2c9921b2527d5ff6948a61a6147c94bd023fe6.exe
"C:\Users\Admin\AppData\Local\Temp\b883b97b17450a10f95eba96de2c9921b2527d5ff6948a61a6147c94bd023fe6.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4988
- C:\Users\Admin\AppData\Local\Temp\u3uk.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u3uk.0.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:2368
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2368 -s 1364
    3⤵
    - Program crash
    PID:3660
- C:\Users\Admin\AppData\Local\Temp\u3uk.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u3uk.1.exe"
  2⤵
  - Executes dropped EXE
  - Checks SCSI registry key(s)
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:1896
- - 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:3008
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4988 -s 1164
  2⤵
  - Program crash
  PID:2640

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 4988 -ip 4988
1⤵
PID:4744

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 2368 -ip 2368
1⤵
PID:2288

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\u3uk.0.exe

Filesize
223KB

MD5
816cbc57fc20eb01645497ed35bdeb19

SHA1
3222b725c5031a12b310ef8c1b8bb120b345c80e

SHA256
c15c3a1a771770d1f3a838cdb6d0fcffea562e42d118b37087dd6022fff13c53

SHA512
2bf23ac407844682107c68705e0ac072d7a8767f0c9a8c2bb913cc394e6c85bd22a7024c5253130f4a5b26a083e9518f2d4f21b775da6d2812ab808587aa399e

Download Submit
C:\Users\Admin\AppData\Local\Temp\u3uk.1.exe

Filesize
4.6MB

MD5
397926927bca55be4a77839b1c44de6e

SHA1
e10f3434ef3021c399dbba047832f02b3c898dbd

SHA256
4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

SHA512
cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

Download Submit
memory/1896-54-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/1896-66-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/2368-106-0x0000000000400000-0x0000000002574000-memory.dmp

Filesize
33.5MB

Download
memory/2368-104-0x0000000000400000-0x0000000002574000-memory.dmp

Filesize
33.5MB

Download
memory/2368-13-0x0000000000400000-0x0000000002574000-memory.dmp

Filesize
33.5MB

Download
memory/2368-14-0x0000000000400000-0x0000000002574000-memory.dmp

Filesize
33.5MB

Download
memory/2368-25-0x0000000000400000-0x0000000002574000-memory.dmp

Filesize
33.5MB

Download
memory/2368-102-0x0000000000400000-0x0000000002574000-memory.dmp

Filesize
33.5MB

Download
memory/2368-99-0x0000000000400000-0x0000000002574000-memory.dmp

Filesize
33.5MB

Download
memory/3008-88-0x000001FACA6D0000-0x000001FACA6DA000-memory.dmp

Filesize
40KB

Download
memory/3008-84-0x000001FAC9E20000-0x000001FAC9E28000-memory.dmp

Filesize
32KB

Download
memory/3008-67-0x000001FAA75D0000-0x000001FAAAE04000-memory.dmp

Filesize
56.2MB

Download
memory/3008-68-0x000001FAC5700000-0x000001FAC580A000-memory.dmp

Filesize
1.0MB

Download
memory/3008-70-0x000001FAACC20000-0x000001FAACC2C000-memory.dmp

Filesize
48KB

Download
memory/3008-69-0x000001FAAB270000-0x000001FAAB280000-memory.dmp

Filesize
64KB

Download
memory/3008-71-0x000001FAACC10000-0x000001FAACC24000-memory.dmp

Filesize
80KB

Download
memory/3008-72-0x000001FAACC40000-0x000001FAACC64000-memory.dmp

Filesize
144KB

Download
memory/3008-73-0x000001FAC5480000-0x000001FAC548A000-memory.dmp

Filesize
40KB

Download
memory/3008-74-0x000001FAC55C0000-0x000001FAC55EA000-memory.dmp

Filesize
168KB

Download
memory/3008-75-0x000001FAC5630000-0x000001FAC56E2000-memory.dmp

Filesize
712KB

Download
memory/3008-76-0x000001FAC59B0000-0x000001FAC5A00000-memory.dmp

Filesize
320KB

Download
memory/3008-77-0x000001FAC55F0000-0x000001FAC5612000-memory.dmp

Filesize
136KB

Download
memory/3008-78-0x000001FAAB2C0000-0x000001FAAB2CA000-memory.dmp

Filesize
40KB

Download
memory/3008-82-0x000001FAC5A00000-0x000001FAC5D00000-memory.dmp

Filesize
3.0MB

Download
memory/3008-97-0x000001FACA4B0000-0x000001FACA4CE000-memory.dmp

Filesize
120KB

Download
memory/3008-85-0x000001FAC9DA0000-0x000001FAC9DD8000-memory.dmp

Filesize
224KB

Download
memory/3008-86-0x000001FAC9D70000-0x000001FAC9D7E000-memory.dmp

Filesize
56KB

Download
memory/3008-87-0x000001FAC9D90000-0x000001FAC9D98000-memory.dmp

Filesize
32KB

Download
memory/3008-96-0x000001FACA550000-0x000001FACA5C6000-memory.dmp

Filesize
472KB

Download
memory/3008-89-0x000001FACA6F0000-0x000001FACA752000-memory.dmp

Filesize
392KB

Download
memory/3008-90-0x000001FACA450000-0x000001FACA472000-memory.dmp

Filesize
136KB

Download
memory/3008-91-0x000001FACAC80000-0x000001FACB1A8000-memory.dmp

Filesize
5.2MB

Download
memory/3008-95-0x000001FACA470000-0x000001FACA47C000-memory.dmp

Filesize
48KB

Download
memory/4988-1-0x00000000027B0000-0x00000000028B0000-memory.dmp

Filesize
1024KB

Download
memory/4988-36-0x0000000004320000-0x000000000438C000-memory.dmp

Filesize
432KB

Download
memory/4988-37-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/4988-34-0x0000000000400000-0x0000000002597000-memory.dmp

Filesize
33.6MB

Download
memory/4988-3-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/4988-2-0x0000000004320000-0x000000000438C000-memory.dmp

Filesize
432KB

Download