stealc | b21236873589e7a87443638329edc4d16f6f56a48ddebbba3d5ccd0e9401ecbd

Analysis

max time kernel
128s
max time network
132s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
08-05-2024 15:46

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General

Target

b21236873589e7a87443638329edc4d16f6f56a48ddebbba3d5ccd0e9401ecbd.exe
Size

365KB
MD5

b1dec1297755fa5d0dd45742506cc365
SHA1

8129aab6ae529b053cf2e7ef82cf25108789b0bb
SHA256

b21236873589e7a87443638329edc4d16f6f56a48ddebbba3d5ccd0e9401ecbd
SHA512

04bb173e13e0848433a1b638188d0c6981f570b00534836c09833528d7bf44f61d813b3132d0288f8c594402b65b0172fc8078d7eed1d39384ed35d8d9386987
SSDEEP

6144:0j9PNW6k+7KXF5gUZwnAFpPLr2PXEVT1NjGzG4YqJcbbYTOO1:0j9PA6d7K4UZwQ2Xw1mt+b8OO1

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/5008-64-0x000002475B3E0000-0x000002475EC14000-memory.dmp	family_zgrat_v1
behavioral2/memory/5008-65-0x0000024779490000-0x000002477959A000-memory.dmp	family_zgrat_v1
behavioral2/memory/5008-69-0x000002475F1B0000-0x000002475F1D4000-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
4368	u2wg.0.exe
2632	u2wg.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
868	3760	WerFault.exe	78
780	4368	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 queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u2wg.1.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u2wg.1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u2wg.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	u2wg.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u2wg.0.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
5008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
5008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
5008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
5008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
5008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
5008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
5008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
5008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
5008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
5008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
5008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
5008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
5008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
5008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
5008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
5008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
5008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
5008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
5008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4368	u2wg.0.exe
4368	u2wg.0.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5008	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
2632	u2wg.1.exe
2632	u2wg.1.exe
2632	u2wg.1.exe
2632	u2wg.1.exe
2632	u2wg.1.exe
2632	u2wg.1.exe
2632	u2wg.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
2632	u2wg.1.exe
2632	u2wg.1.exe
2632	u2wg.1.exe
2632	u2wg.1.exe
2632	u2wg.1.exe
2632	u2wg.1.exe
2632	u2wg.1.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3760 wrote to memory of 4368	3760	b21236873589e7a87443638329edc4d16f6f56a48ddebbba3d5ccd0e9401ecbd.exe	80
PID 3760 wrote to memory of 4368	3760	b21236873589e7a87443638329edc4d16f6f56a48ddebbba3d5ccd0e9401ecbd.exe	80
PID 3760 wrote to memory of 4368	3760	b21236873589e7a87443638329edc4d16f6f56a48ddebbba3d5ccd0e9401ecbd.exe	80
PID 3760 wrote to memory of 2632	3760	b21236873589e7a87443638329edc4d16f6f56a48ddebbba3d5ccd0e9401ecbd.exe	83
PID 3760 wrote to memory of 2632	3760	b21236873589e7a87443638329edc4d16f6f56a48ddebbba3d5ccd0e9401ecbd.exe	83
PID 3760 wrote to memory of 2632	3760	b21236873589e7a87443638329edc4d16f6f56a48ddebbba3d5ccd0e9401ecbd.exe	83
PID 2632 wrote to memory of 5008	2632	u2wg.1.exe	89
PID 2632 wrote to memory of 5008	2632	u2wg.1.exe	89

C:\Users\Admin\AppData\Local\Temp\b21236873589e7a87443638329edc4d16f6f56a48ddebbba3d5ccd0e9401ecbd.exe
"C:\Users\Admin\AppData\Local\Temp\b21236873589e7a87443638329edc4d16f6f56a48ddebbba3d5ccd0e9401ecbd.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3760
- C:\Users\Admin\AppData\Local\Temp\u2wg.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u2wg.0.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:4368
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4368 -s 1268
    3⤵
    - Program crash
    PID:780
- C:\Users\Admin\AppData\Local\Temp\u2wg.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u2wg.1.exe"
  2⤵
  - Executes dropped EXE
  - Checks SCSI registry key(s)
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2632
- - 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:5008
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3760 -s 992
  2⤵
  - Program crash
  PID:868

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 3760 -ip 3760
1⤵
PID:1120

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4368 -ip 4368
1⤵
PID:2340

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\u2wg.0.exe

Filesize
223KB

MD5
68b1200c9bd2fd38fa959110f99c67ed

SHA1
02a246137a35c03292334466904dc609b04e97e2

SHA256
021d9fa1c537c10c68c08db1d0f77da7240c1268d4dd2985cfece06d2cb78c8f

SHA512
f5ba3d7919cda2095fe3e979d7557a9b40cf84a4612c0aef38030f310dd285650314ccc48e5e80691cba687c7d104921dbd2d90412588dd536f0735e1b6ede39

Download Submit
C:\Users\Admin\AppData\Local\Temp\u2wg.1.exe

Filesize
4.6MB

MD5
397926927bca55be4a77839b1c44de6e

SHA1
e10f3434ef3021c399dbba047832f02b3c898dbd

SHA256
4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

SHA512
cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

Download Submit
memory/2632-51-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/2632-63-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/3760-1-0x0000000001D00000-0x0000000001E00000-memory.dmp

Filesize
1024KB

Download
memory/3760-3-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/3760-2-0x00000000037A0000-0x000000000380C000-memory.dmp

Filesize
432KB

Download
memory/3760-34-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/3760-33-0x0000000000400000-0x0000000001A25000-memory.dmp

Filesize
22.1MB

Download
memory/4368-14-0x0000000000400000-0x0000000001A02000-memory.dmp

Filesize
22.0MB

Download
memory/4368-13-0x0000000000400000-0x0000000001A02000-memory.dmp

Filesize
22.0MB

Download
memory/4368-103-0x0000000000400000-0x0000000001A02000-memory.dmp

Filesize
22.0MB

Download
memory/4368-101-0x0000000000400000-0x0000000001A02000-memory.dmp

Filesize
22.0MB

Download
memory/4368-99-0x0000000000400000-0x0000000001A02000-memory.dmp

Filesize
22.0MB

Download
memory/4368-96-0x0000000000400000-0x0000000001A02000-memory.dmp

Filesize
22.0MB

Download
memory/5008-71-0x00000247793E0000-0x000002477940A000-memory.dmp

Filesize
168KB

Download
memory/5008-84-0x000002477DB10000-0x000002477DB1E000-memory.dmp

Filesize
56KB

Download
memory/5008-70-0x0000024779290000-0x000002477929A000-memory.dmp

Filesize
40KB

Download
memory/5008-68-0x000002475F170000-0x000002475F184000-memory.dmp

Filesize
80KB

Download
memory/5008-72-0x00000247796F0000-0x00000247797A2000-memory.dmp

Filesize
712KB

Download
memory/5008-73-0x00000247797A0000-0x00000247797F0000-memory.dmp

Filesize
320KB

Download
memory/5008-74-0x0000024779440000-0x0000024779462000-memory.dmp

Filesize
136KB

Download
memory/5008-75-0x000002475F150000-0x000002475F15A000-memory.dmp

Filesize
40KB

Download
memory/5008-79-0x00000247797F0000-0x0000024779AF0000-memory.dmp

Filesize
3.0MB

Download
memory/5008-82-0x000002477DB00000-0x000002477DB08000-memory.dmp

Filesize
32KB

Download
memory/5008-83-0x000002477DB50000-0x000002477DB88000-memory.dmp

Filesize
224KB

Download
memory/5008-69-0x000002475F1B0000-0x000002475F1D4000-memory.dmp

Filesize
144KB

Download
memory/5008-85-0x000002477DB20000-0x000002477DB28000-memory.dmp

Filesize
32KB

Download
memory/5008-87-0x0000024700300000-0x0000024700362000-memory.dmp

Filesize
392KB

Download
memory/5008-86-0x0000024700580000-0x000002470058A000-memory.dmp

Filesize
40KB

Download
memory/5008-88-0x0000024700360000-0x0000024700382000-memory.dmp

Filesize
136KB

Download
memory/5008-89-0x0000024700AC0000-0x0000024700FE8000-memory.dmp

Filesize
5.2MB

Download
memory/5008-92-0x0000024700380000-0x000002470038C000-memory.dmp

Filesize
48KB

Download
memory/5008-93-0x000002477E070000-0x000002477E0E6000-memory.dmp

Filesize
472KB

Download
memory/5008-94-0x000002477DB90000-0x000002477DBAE000-memory.dmp

Filesize
120KB

Download
memory/5008-66-0x000002475F130000-0x000002475F140000-memory.dmp

Filesize
64KB

Download
memory/5008-67-0x000002475F190000-0x000002475F19C000-memory.dmp

Filesize
48KB

Download
memory/5008-65-0x0000024779490000-0x000002477959A000-memory.dmp

Filesize
1.0MB

Download
memory/5008-64-0x000002475B3E0000-0x000002475EC14000-memory.dmp

Filesize
56.2MB

Download