stealc | c76f9415cebd74a20086f21fabe385f8cc70efca798fd89176125bad770ba695

Analysis

max time kernel
147s
max time network
156s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
09-05-2024 02:48

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General

Target

c76f9415cebd74a20086f21fabe385f8cc70efca798fd89176125bad770ba695.exe
Size

365KB
MD5

4a4a9f6df96c5a55a8ed433caf274d4b
SHA1

80342cf02bbc35a5d2d86a9833cba0ddd07db6bf
SHA256

c76f9415cebd74a20086f21fabe385f8cc70efca798fd89176125bad770ba695
SHA512

07dc60a192b4d3d9592dab218149e9133efb5a05c448eab7647dca1d3e2e81f2054c2fbbecd9d1e44a26e9bb511bf234d84822a210599146fae172c8e9a1a09a
SSDEEP

6144:1/yLAzjI3/kXehHDXHmlk+gdfmXHduMiFScdOVMJVGga06LNH4THWM:ZyLA/IPkXehHDXGnghm7YSUOVoVcVLNC

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/1524-65-0x000001B727370000-0x000001B72ABA4000-memory.dmp	family_zgrat_v1
behavioral2/memory/1524-66-0x000001B745420000-0x000001B74552A000-memory.dmp	family_zgrat_v1
behavioral2/memory/1524-70-0x000001B7450E0000-0x000001B745104000-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
3452	u3ts.0.exe
2712	u3ts.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
3932	4960	WerFault.exe	78
4780	3452	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	u3ts.1.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3ts.1.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3ts.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	u3ts.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u3ts.0.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
1524	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1524	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1524	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1524	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1524	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1524	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1524	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1524	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1524	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1524	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1524	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1524	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1524	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1524	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1524	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1524	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1524	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1524	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1524	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3452	u3ts.0.exe
3452	u3ts.0.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1524	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
2712	u3ts.1.exe
2712	u3ts.1.exe
2712	u3ts.1.exe
2712	u3ts.1.exe
2712	u3ts.1.exe
2712	u3ts.1.exe
2712	u3ts.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
2712	u3ts.1.exe
2712	u3ts.1.exe
2712	u3ts.1.exe
2712	u3ts.1.exe
2712	u3ts.1.exe
2712	u3ts.1.exe
2712	u3ts.1.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4960 wrote to memory of 3452	4960	c76f9415cebd74a20086f21fabe385f8cc70efca798fd89176125bad770ba695.exe	80
PID 4960 wrote to memory of 3452	4960	c76f9415cebd74a20086f21fabe385f8cc70efca798fd89176125bad770ba695.exe	80
PID 4960 wrote to memory of 3452	4960	c76f9415cebd74a20086f21fabe385f8cc70efca798fd89176125bad770ba695.exe	80
PID 4960 wrote to memory of 2712	4960	c76f9415cebd74a20086f21fabe385f8cc70efca798fd89176125bad770ba695.exe	83
PID 4960 wrote to memory of 2712	4960	c76f9415cebd74a20086f21fabe385f8cc70efca798fd89176125bad770ba695.exe	83
PID 4960 wrote to memory of 2712	4960	c76f9415cebd74a20086f21fabe385f8cc70efca798fd89176125bad770ba695.exe	83
PID 2712 wrote to memory of 1524	2712	u3ts.1.exe	89
PID 2712 wrote to memory of 1524	2712	u3ts.1.exe	89

C:\Users\Admin\AppData\Local\Temp\c76f9415cebd74a20086f21fabe385f8cc70efca798fd89176125bad770ba695.exe
"C:\Users\Admin\AppData\Local\Temp\c76f9415cebd74a20086f21fabe385f8cc70efca798fd89176125bad770ba695.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4960
- C:\Users\Admin\AppData\Local\Temp\u3ts.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u3ts.0.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3452
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3452 -s 792
    3⤵
    - Program crash
    PID:4780
- C:\Users\Admin\AppData\Local\Temp\u3ts.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u3ts.1.exe"
  2⤵
  - Executes dropped EXE
  - Checks SCSI registry key(s)
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2712
- - 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:1524
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4960 -s 1600
  2⤵
  - Program crash
  PID:3932

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4960 -ip 4960
1⤵
PID:2592

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 3452 -ip 3452
1⤵
PID:4800

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\u3ts.0.exe

Filesize
223KB

MD5
8a9a1b742b75353c203f733b24d071ff

SHA1
1e390f6625abeaf1b8155ed4a356547047429c01

SHA256
ab5504a33a8bc3ac59151aa8c10e03600eca853df87a8080e3fdff8b0dc409f1

SHA512
df684e2538811b4c71df55493502bf6736a419ea61e45bac6f40e9efd6504e19a214382ac2ab692c082dff69923124df54e3a820529e7c2ddf5e962fdf5ea78d

Download Submit
C:\Users\Admin\AppData\Local\Temp\u3ts.1.exe

Filesize
4.6MB

MD5
397926927bca55be4a77839b1c44de6e

SHA1
e10f3434ef3021c399dbba047832f02b3c898dbd

SHA256
4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

SHA512
cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

Download Submit
memory/1524-87-0x000001B74A4A0000-0x000001B74A502000-memory.dmp

Filesize
392KB

Download
memory/1524-67-0x000001B72B0D0000-0x000001B72B0E0000-memory.dmp

Filesize
64KB

Download
memory/1524-74-0x000001B7455B0000-0x000001B745600000-memory.dmp

Filesize
320KB

Download
memory/1524-94-0x000001B74A260000-0x000001B74A27E000-memory.dmp

Filesize
120KB

Download
memory/1524-93-0x000001B74A300000-0x000001B74A376000-memory.dmp

Filesize
472KB

Download
memory/1524-92-0x000001B74A220000-0x000001B74A22C000-memory.dmp

Filesize
48KB

Download
memory/1524-89-0x000001B74AA30000-0x000001B74AF58000-memory.dmp

Filesize
5.2MB

Download
memory/1524-88-0x000001B74A200000-0x000001B74A222000-memory.dmp

Filesize
136KB

Download
memory/1524-73-0x000001B745530000-0x000001B74555A000-memory.dmp

Filesize
168KB

Download
memory/1524-75-0x000001B745770000-0x000001B745792000-memory.dmp

Filesize
136KB

Download
memory/1524-65-0x000001B727370000-0x000001B72ABA4000-memory.dmp

Filesize
56.2MB

Download
memory/1524-66-0x000001B745420000-0x000001B74552A000-memory.dmp

Filesize
1.0MB

Download
memory/1524-68-0x000001B745080000-0x000001B74508C000-memory.dmp

Filesize
48KB

Download
memory/1524-85-0x000001B749B00000-0x000001B749B08000-memory.dmp

Filesize
32KB

Download
memory/1524-69-0x000001B745070000-0x000001B745084000-memory.dmp

Filesize
80KB

Download
memory/1524-70-0x000001B7450E0000-0x000001B745104000-memory.dmp

Filesize
144KB

Download
memory/1524-71-0x000001B745110000-0x000001B74511A000-memory.dmp

Filesize
40KB

Download
memory/1524-72-0x000001B745170000-0x000001B745222000-memory.dmp

Filesize
712KB

Download
memory/1524-83-0x000001B749B10000-0x000001B749B48000-memory.dmp

Filesize
224KB

Download
memory/1524-86-0x000001B74A480000-0x000001B74A48A000-memory.dmp

Filesize
40KB

Download
memory/1524-84-0x000001B749AE0000-0x000001B749AEE000-memory.dmp

Filesize
56KB

Download
memory/1524-76-0x000001B745120000-0x000001B74512A000-memory.dmp

Filesize
40KB

Download
memory/1524-80-0x000001B7457A0000-0x000001B745AA0000-memory.dmp

Filesize
3.0MB

Download
memory/1524-82-0x000001B74A1D0000-0x000001B74A1D8000-memory.dmp

Filesize
32KB

Download
memory/2712-52-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/2712-64-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/3452-101-0x0000000000400000-0x0000000002574000-memory.dmp

Filesize
33.5MB

Download
memory/3452-14-0x0000000000400000-0x0000000002574000-memory.dmp

Filesize
33.5MB

Download
memory/3452-96-0x0000000000400000-0x0000000002574000-memory.dmp

Filesize
33.5MB

Download
memory/3452-99-0x0000000000400000-0x0000000002574000-memory.dmp

Filesize
33.5MB

Download
memory/3452-13-0x0000000000400000-0x0000000002574000-memory.dmp

Filesize
33.5MB

Download
memory/3452-103-0x0000000000400000-0x0000000002574000-memory.dmp

Filesize
33.5MB

Download
memory/4960-3-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/4960-1-0x0000000002750000-0x0000000002850000-memory.dmp

Filesize
1024KB

Download
memory/4960-33-0x0000000000400000-0x0000000002597000-memory.dmp

Filesize
33.6MB

Download
memory/4960-34-0x00000000042B0000-0x000000000431C000-memory.dmp

Filesize
432KB

Download
memory/4960-35-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/4960-2-0x00000000042B0000-0x000000000431C000-memory.dmp

Filesize
432KB

Download