stealc | 991e13cb726297c197cef44a771e0f79b3f1669ee6c9fd1dffcd60a66c784772

Analysis

max time kernel
129s
max time network
134s
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, 15:47

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General

Target

991e13cb726297c197cef44a771e0f79b3f1669ee6c9fd1dffcd60a66c784772.exe
Size

365KB
MD5

d88ed646b49723f7bc0a11e8141a3cac
SHA1

e91853aad5f1b9c658df0133370c7d23694fb7bb
SHA256

991e13cb726297c197cef44a771e0f79b3f1669ee6c9fd1dffcd60a66c784772
SHA512

a8a72c8564576aceedfdf47fec25dfbba3602ad82ab80dea4a8564c933fedffbb7e35333dfb55c482114c08913ad26074b51612fa35c60a0233a22938bae6a76
SSDEEP

6144:0j9PNW6k+7KXF5gUZwnAFpPLr2PXEVT1NjGzG4YqJcbbYTOO/:0j9PA6d7K4UZwQ2Xw1mt+b8OO/

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/3964-64-0x000001B46CB40000-0x000001B470374000-memory.dmp	family_zgrat_v1
behavioral2/memory/3964-66-0x000001B472C20000-0x000001B472D2A000-memory.dmp	family_zgrat_v1
behavioral2/memory/3964-70-0x000001B472AA0000-0x000001B472AC4000-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
4928	u2zs.0.exe
1748	u2zs.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
3280	3880	WerFault.exe	79
3704	4928	WerFault.exe	81

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	u2zs.1.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u2zs.1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u2zs.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	u2zs.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u2zs.0.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
3964	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3964	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3964	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3964	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3964	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3964	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3964	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3964	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3964	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3964	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3964	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3964	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3964	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3964	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3964	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3964	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3964	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3964	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3964	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3964	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3964	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
4928	u2zs.0.exe
4928	u2zs.0.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3964	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
1748	u2zs.1.exe
1748	u2zs.1.exe
1748	u2zs.1.exe
1748	u2zs.1.exe
1748	u2zs.1.exe
1748	u2zs.1.exe
1748	u2zs.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
1748	u2zs.1.exe
1748	u2zs.1.exe
1748	u2zs.1.exe
1748	u2zs.1.exe
1748	u2zs.1.exe
1748	u2zs.1.exe
1748	u2zs.1.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3880 wrote to memory of 4928	3880	991e13cb726297c197cef44a771e0f79b3f1669ee6c9fd1dffcd60a66c784772.exe	81
PID 3880 wrote to memory of 4928	3880	991e13cb726297c197cef44a771e0f79b3f1669ee6c9fd1dffcd60a66c784772.exe	81
PID 3880 wrote to memory of 4928	3880	991e13cb726297c197cef44a771e0f79b3f1669ee6c9fd1dffcd60a66c784772.exe	81
PID 3880 wrote to memory of 1748	3880	991e13cb726297c197cef44a771e0f79b3f1669ee6c9fd1dffcd60a66c784772.exe	84
PID 3880 wrote to memory of 1748	3880	991e13cb726297c197cef44a771e0f79b3f1669ee6c9fd1dffcd60a66c784772.exe	84
PID 3880 wrote to memory of 1748	3880	991e13cb726297c197cef44a771e0f79b3f1669ee6c9fd1dffcd60a66c784772.exe	84
PID 1748 wrote to memory of 3964	1748	u2zs.1.exe	90
PID 1748 wrote to memory of 3964	1748	u2zs.1.exe	90

C:\Users\Admin\AppData\Local\Temp\991e13cb726297c197cef44a771e0f79b3f1669ee6c9fd1dffcd60a66c784772.exe
"C:\Users\Admin\AppData\Local\Temp\991e13cb726297c197cef44a771e0f79b3f1669ee6c9fd1dffcd60a66c784772.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3880
- C:\Users\Admin\AppData\Local\Temp\u2zs.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u2zs.0.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:4928
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4928 -s 1372
    3⤵
    - Program crash
    PID:3704
- C:\Users\Admin\AppData\Local\Temp\u2zs.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u2zs.1.exe"
  2⤵
  - Executes dropped EXE
  - Checks SCSI registry key(s)
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:1748
- - 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:3964
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3880 -s 1532
  2⤵
  - Program crash
  PID:3280

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 3880 -ip 3880
1⤵
PID:3340

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 356 -p 4928 -ip 4928
1⤵
PID:1444

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
2KB

MD5
368a1735111923e4a5380e42ca74873e

SHA1
6358b5278c980003381e83d65f0be04f9d6444a2

SHA256
17d5a3752e5edb77db23a8909a1ddd79eb9785b1da8ddc7f7166e8498727d09d

SHA512
9e8d526df5bf2f096870b2580c8ed7e7c714b7661d5d72461c0a4befffcfd6abf4d076dd277970d43c07d51497e15c67c4332ea724dfbcced2e43c9d6171c40a

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

Filesize
3KB

MD5
b28eacb46cc2beb9cdae9f7a16a2a410

SHA1
bd2614fef70682191cad13adc635bb4287eed572

SHA256
f939bc321e3abd1418126330aef962287c4ce66d5093ff8418e157d59381d555

SHA512
fa8a3f6a06a1b4fef3be50604bcd99bb04705ba0c127935c96774e4993c57a566db4166d3a93251468a294fc35d9cca488471ba786180e0a399db474ae4fe4cc

Download Submit
C:\Users\Admin\AppData\Local\Temp\u2zs.0.exe

Filesize
223KB

MD5
68b1200c9bd2fd38fa959110f99c67ed

SHA1
02a246137a35c03292334466904dc609b04e97e2

SHA256
021d9fa1c537c10c68c08db1d0f77da7240c1268d4dd2985cfece06d2cb78c8f

SHA512
f5ba3d7919cda2095fe3e979d7557a9b40cf84a4612c0aef38030f310dd285650314ccc48e5e80691cba687c7d104921dbd2d90412588dd536f0735e1b6ede39

Download Submit
C:\Users\Admin\AppData\Local\Temp\u2zs.1.exe

Filesize
4.6MB

MD5
397926927bca55be4a77839b1c44de6e

SHA1
e10f3434ef3021c399dbba047832f02b3c898dbd

SHA256
4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

SHA512
cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

Download Submit
memory/1748-63-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/1748-51-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/3880-3-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/3880-2-0x0000000003750000-0x00000000037BC000-memory.dmp

Filesize
432KB

Download
memory/3880-1-0x0000000001BE0000-0x0000000001CE0000-memory.dmp

Filesize
1024KB

Download
memory/3880-34-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/3880-33-0x0000000000400000-0x0000000001A25000-memory.dmp

Filesize
22.1MB

Download
memory/3964-72-0x000001B472B30000-0x000001B472B5A000-memory.dmp

Filesize
168KB

Download
memory/3964-82-0x000001B477990000-0x000001B477998000-memory.dmp

Filesize
32KB

Download
memory/3964-64-0x000001B46CB40000-0x000001B470374000-memory.dmp

Filesize
56.2MB

Download
memory/3964-66-0x000001B472C20000-0x000001B472D2A000-memory.dmp

Filesize
1.0MB

Download
memory/3964-68-0x000001B472A40000-0x000001B472A4C000-memory.dmp

Filesize
48KB

Download
memory/3964-67-0x000001B472900000-0x000001B472910000-memory.dmp

Filesize
64KB

Download
memory/3964-70-0x000001B472AA0000-0x000001B472AC4000-memory.dmp

Filesize
144KB

Download
memory/3964-69-0x000001B472A20000-0x000001B472A34000-memory.dmp

Filesize
80KB

Download
memory/3964-73-0x000001B472B60000-0x000001B472C12000-memory.dmp

Filesize
712KB

Download
memory/3964-94-0x000001B477A20000-0x000001B477A3E000-memory.dmp

Filesize
120KB

Download
memory/3964-71-0x000001B472AD0000-0x000001B472ADA000-memory.dmp

Filesize
40KB

Download
memory/3964-74-0x000001B472ED0000-0x000001B472F20000-memory.dmp

Filesize
320KB

Download
memory/3964-75-0x000001B472F20000-0x000001B472F42000-memory.dmp

Filesize
136KB

Download
memory/3964-76-0x000001B470850000-0x000001B47085A000-memory.dmp

Filesize
40KB

Download
memory/3964-80-0x000001B472F50000-0x000001B473250000-memory.dmp

Filesize
3.0MB

Download
memory/3964-93-0x000001B477AC0000-0x000001B477B36000-memory.dmp

Filesize
472KB

Download
memory/3964-83-0x000001B4772D0000-0x000001B477308000-memory.dmp

Filesize
224KB

Download
memory/3964-84-0x000001B4772A0000-0x000001B4772AE000-memory.dmp

Filesize
56KB

Download
memory/3964-85-0x000001B4772C0000-0x000001B4772C8000-memory.dmp

Filesize
32KB

Download
memory/3964-86-0x000001B477C40000-0x000001B477C4A000-memory.dmp

Filesize
40KB

Download
memory/3964-87-0x000001B477C60000-0x000001B477CC2000-memory.dmp

Filesize
392KB

Download
memory/3964-88-0x000001B4779C0000-0x000001B4779E2000-memory.dmp

Filesize
136KB

Download
memory/3964-89-0x000001B4781F0000-0x000001B478718000-memory.dmp

Filesize
5.2MB

Download
memory/3964-92-0x000001B4779E0000-0x000001B4779EC000-memory.dmp

Filesize
48KB

Download
memory/4928-14-0x0000000000400000-0x0000000001A02000-memory.dmp

Filesize
22.0MB

Download
memory/4928-13-0x0000000000400000-0x0000000001A02000-memory.dmp

Filesize
22.0MB

Download
memory/4928-96-0x0000000000400000-0x0000000001A02000-memory.dmp

Filesize
22.0MB

Download
memory/4928-99-0x0000000000400000-0x0000000001A02000-memory.dmp

Filesize
22.0MB

Download
memory/4928-101-0x0000000000400000-0x0000000001A02000-memory.dmp

Filesize
22.0MB

Download
memory/4928-103-0x0000000000400000-0x0000000001A02000-memory.dmp

Filesize
22.0MB

Download