stealc | 9420c81b7ccceefe022ab68286e2efd006f9e39179ed988448203eebb186cb7f

Analysis

max time kernel
133s
max time network
132s
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 15:49

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General

Target

9420c81b7ccceefe022ab68286e2efd006f9e39179ed988448203eebb186cb7f.exe
Size

382KB
MD5

d213fbb1dc57328da6772ea5aeebce26
SHA1

8e3c8cc4edc4ce51fb79653e98ac925590dfda89
SHA256

9420c81b7ccceefe022ab68286e2efd006f9e39179ed988448203eebb186cb7f
SHA512

c6252b1d2a44c5c9887dfce46b92aa841f5c819bbffe1e5f3a9ed0b2964d395d8d59fef31deff5a8fc1634cd61754067d37b23d2573f22f53b5fa36df118990a
SSDEEP

6144:6vNgu2vVzeAvNremF2xnbfS13eB43pvuL7HpyEeJKXF:6vNL2vVSzmQxnbf4mCSHpy9JKXF

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/2256-66-0x000002540DAB0000-0x00000254112E4000-memory.dmp	family_zgrat_v1
behavioral2/memory/2256-67-0x000002542BB20000-0x000002542BC2A000-memory.dmp	family_zgrat_v1
behavioral2/memory/2256-71-0x0000025413140000-0x0000025413164000-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
1616	u11s.0.exe
3884	u11s.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
1764	1360	WerFault.exe	76
4092	1616	WerFault.exe	77

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	u11s.1.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u11s.1.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u11s.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	u11s.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u11s.0.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
2256	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2256	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2256	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2256	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2256	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2256	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2256	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2256	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2256	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2256	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2256	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2256	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2256	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2256	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2256	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2256	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2256	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2256	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2256	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1616	u11s.0.exe
1616	u11s.0.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2256	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
3884	u11s.1.exe
3884	u11s.1.exe
3884	u11s.1.exe
3884	u11s.1.exe
3884	u11s.1.exe
3884	u11s.1.exe
3884	u11s.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
3884	u11s.1.exe
3884	u11s.1.exe
3884	u11s.1.exe
3884	u11s.1.exe
3884	u11s.1.exe
3884	u11s.1.exe
3884	u11s.1.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1360 wrote to memory of 1616	1360	9420c81b7ccceefe022ab68286e2efd006f9e39179ed988448203eebb186cb7f.exe	77
PID 1360 wrote to memory of 1616	1360	9420c81b7ccceefe022ab68286e2efd006f9e39179ed988448203eebb186cb7f.exe	77
PID 1360 wrote to memory of 1616	1360	9420c81b7ccceefe022ab68286e2efd006f9e39179ed988448203eebb186cb7f.exe	77
PID 1360 wrote to memory of 3884	1360	9420c81b7ccceefe022ab68286e2efd006f9e39179ed988448203eebb186cb7f.exe	80
PID 1360 wrote to memory of 3884	1360	9420c81b7ccceefe022ab68286e2efd006f9e39179ed988448203eebb186cb7f.exe	80
PID 1360 wrote to memory of 3884	1360	9420c81b7ccceefe022ab68286e2efd006f9e39179ed988448203eebb186cb7f.exe	80
PID 3884 wrote to memory of 2256	3884	u11s.1.exe	85
PID 3884 wrote to memory of 2256	3884	u11s.1.exe	85

C:\Users\Admin\AppData\Local\Temp\9420c81b7ccceefe022ab68286e2efd006f9e39179ed988448203eebb186cb7f.exe
"C:\Users\Admin\AppData\Local\Temp\9420c81b7ccceefe022ab68286e2efd006f9e39179ed988448203eebb186cb7f.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1360
- C:\Users\Admin\AppData\Local\Temp\u11s.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u11s.0.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:1616
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1616 -s 1168
    3⤵
    - Program crash
    PID:4092
- C:\Users\Admin\AppData\Local\Temp\u11s.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u11s.1.exe"
  2⤵
  - Executes dropped EXE
  - Checks SCSI registry key(s)
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:3884
- - 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:2256
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1360 -s 1608
  2⤵
  - Program crash
  PID:1764

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 1360 -ip 1360
1⤵
PID:1688

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1616 -ip 1616
1⤵
PID:2324

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
3KB

MD5
72ea8b6150e3105c727bbe38439ee78f

SHA1
caf9ecf129c79d9e3046c4545517a91a3877abf4

SHA256
395684453dd62b874d23b9058a314ba94ed618c308d3009cdfeba142eac865fd

SHA512
b50fc0bbb04ae587fdf49d5c2b7e9dd749b9ad4c1ae22c5e63b322a32a3d258f307e39459a19f959b92c64da0a2583210fd092e60ccd9ada212c7e8baf2f9164

Download Submit
C:\Users\Admin\AppData\Local\Temp\u11s.0.exe

Filesize
218KB

MD5
967d1d2071a7f0afa075145319eea73d

SHA1
43208843e80266106e5c96867e7113e90a6f0b59

SHA256
dce56b03d138ced62c5137c164d18240efe3e4a084c70547614b657e2049c6af

SHA512
a7934590abdf271c8ce450ef02bd2fef6aecded10390312f7a340071920e8044886a28dfa8fc415c7da6971c79e85347c5669d73da4a179fc8a56838cd114669

Download Submit
C:\Users\Admin\AppData\Local\Temp\u11s.1.exe

Filesize
4.6MB

MD5
397926927bca55be4a77839b1c44de6e

SHA1
e10f3434ef3021c399dbba047832f02b3c898dbd

SHA256
4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

SHA512
cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

Download Submit
memory/1360-32-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/1360-1-0x0000000002E00000-0x0000000002F00000-memory.dmp

Filesize
1024KB

Download
memory/1360-30-0x0000000000400000-0x0000000002B1D000-memory.dmp

Filesize
39.1MB

Download
memory/1360-3-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/1360-2-0x00000000048A0000-0x000000000490C000-memory.dmp

Filesize
432KB

Download
memory/1616-106-0x0000000000400000-0x0000000002AF4000-memory.dmp

Filesize
39.0MB

Download
memory/1616-62-0x0000000000400000-0x0000000002AF4000-memory.dmp

Filesize
39.0MB

Download
memory/1616-104-0x0000000000400000-0x0000000002AF4000-memory.dmp

Filesize
39.0MB

Download
memory/1616-102-0x0000000000400000-0x0000000002AF4000-memory.dmp

Filesize
39.0MB

Download
memory/1616-99-0x0000000000400000-0x0000000002AF4000-memory.dmp

Filesize
39.0MB

Download
memory/1616-97-0x0000000000400000-0x0000000002AF4000-memory.dmp

Filesize
39.0MB

Download
memory/2256-89-0x0000025430C30000-0x0000025430C52000-memory.dmp

Filesize
136KB

Download
memory/2256-86-0x0000025430230000-0x0000025430238000-memory.dmp

Filesize
32KB

Download
memory/2256-71-0x0000025413140000-0x0000025413164000-memory.dmp

Filesize
144KB

Download
memory/2256-72-0x000002542B940000-0x000002542B94A000-memory.dmp

Filesize
40KB

Download
memory/2256-73-0x000002542B9A0000-0x000002542B9CA000-memory.dmp

Filesize
168KB

Download
memory/2256-74-0x000002542BDF0000-0x000002542BEA2000-memory.dmp

Filesize
712KB

Download
memory/2256-75-0x000002542BC30000-0x000002542BC80000-memory.dmp

Filesize
320KB

Download
memory/2256-76-0x000002542BEA0000-0x000002542BEC2000-memory.dmp

Filesize
136KB

Download
memory/2256-77-0x000002542B950000-0x000002542B95A000-memory.dmp

Filesize
40KB

Download
memory/2256-81-0x000002542BED0000-0x000002542C1D0000-memory.dmp

Filesize
3.0MB

Download
memory/2256-83-0x0000025430900000-0x0000025430908000-memory.dmp

Filesize
32KB

Download
memory/2256-84-0x0000025430240000-0x0000025430278000-memory.dmp

Filesize
224KB

Download
memory/2256-85-0x0000025430210000-0x000002543021E000-memory.dmp

Filesize
56KB

Download
memory/2256-70-0x0000025411810000-0x0000025411824000-memory.dmp

Filesize
80KB

Download
memory/2256-87-0x0000025430BB0000-0x0000025430BBA000-memory.dmp

Filesize
40KB

Download
memory/2256-88-0x0000025430BD0000-0x0000025430C32000-memory.dmp

Filesize
392KB

Download
memory/2256-68-0x0000025411800000-0x0000025411810000-memory.dmp

Filesize
64KB

Download
memory/2256-90-0x0000025431180000-0x00000254316A8000-memory.dmp

Filesize
5.2MB

Download
memory/2256-93-0x0000025430930000-0x000002543093C000-memory.dmp

Filesize
48KB

Download
memory/2256-94-0x0000025430A10000-0x0000025430A86000-memory.dmp

Filesize
472KB

Download
memory/2256-95-0x0000025430970000-0x000002543098E000-memory.dmp

Filesize
120KB

Download
memory/2256-69-0x0000025411820000-0x000002541182C000-memory.dmp

Filesize
48KB

Download
memory/2256-67-0x000002542BB20000-0x000002542BC2A000-memory.dmp

Filesize
1.0MB

Download
memory/2256-66-0x000002540DAB0000-0x00000254112E4000-memory.dmp

Filesize
56.2MB

Download
memory/3884-65-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/3884-53-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download