stealc | 44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
26/01/2025, 07:31 UTC

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General

Target

44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883.exe
Size

1.8MB
MD5

f07885b5720798735df239ba96a9788e
SHA1

eb9a21552b61d4be8dad2928945d72afa23e9262
SHA256

44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883
SHA512

d35e191e3425932a98f31f8ad191cc40865ced4ae486bb0fa0553afeca091837410bcdc6b8d0d744fb1ef639666f81464813134c56ce24cbfd441462adb4bf04
SSDEEP

49152:2wBA0FOqe0cDhapYdwdKXcurXEJIG5rgzIgt6At:NAsz2aZdKXcyXEJlkIort

Score

10^/10

stealc brat defense_evasion discovery stealer

Malware Config

Extracted

Family

stealc

Botnet

brat

http://185.215.113.206

Attributes

url_path
/c4becf79229cb002.php

Signatures

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Stealc family
stealc

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs

defense_evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS 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\SystemBiosVersion	44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883.exe

Identifies Wine through registry keys 2 TTPs 1 IoCs

Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

defense_evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Software\Wine	44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883.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

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
3636	44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3656	3636	WerFault.exe	81

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883.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	44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3636	44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883.exe
3636	44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883.exe
3636	44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883.exe
3636	44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883.exe

C:\Users\Admin\AppData\Local\Temp\44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883.exe
"C:\Users\Admin\AppData\Local\Temp\44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Identifies Wine through registry keys
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:3636
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3636 -s 1472
  2⤵
  - Program crash
  PID:3656

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3636 -ip 3636
1⤵
PID:932

Network

DNS

8.8.8.8.in-addr.arpa

Remote address:

8.8.8.8:53

Request

8.8.8.8.in-addr.arpa

IN PTR

Response

8.8.8.8.in-addr.arpa

IN PTR

dnsgoogle
DNS

104.219.191.52.in-addr.arpa

Remote address:

8.8.8.8:53

Request

104.219.191.52.in-addr.arpa

IN PTR

Response
DNS

81.144.22.2.in-addr.arpa

Remote address:

8.8.8.8:53

Request

81.144.22.2.in-addr.arpa

IN PTR

Response

81.144.22.2.in-addr.arpa

IN PTR

a2-22-144-81deploystaticakamaitechnologiescom
DNS

71.31.126.40.in-addr.arpa

Remote address:

8.8.8.8:53

Request

71.31.126.40.in-addr.arpa

IN PTR

Response
DNS

5.114.82.104.in-addr.arpa

Remote address:

8.8.8.8:53

Request

5.114.82.104.in-addr.arpa

IN PTR

Response

5.114.82.104.in-addr.arpa

IN PTR

a104-82-114-5deploystaticakamaitechnologiescom
DNS

217.106.137.52.in-addr.arpa

Remote address:

8.8.8.8:53

Request

217.106.137.52.in-addr.arpa

IN PTR

Response
DNS

50.23.12.20.in-addr.arpa

Remote address:

8.8.8.8:53

Request

50.23.12.20.in-addr.arpa

IN PTR

Response
DNS

15.164.165.52.in-addr.arpa

Remote address:

8.8.8.8:53

Request

15.164.165.52.in-addr.arpa

IN PTR

Response
DNS

88.238.56.23.in-addr.arpa

Remote address:

8.8.8.8:53

Request

88.238.56.23.in-addr.arpa

IN PTR

Response

88.238.56.23.in-addr.arpa

IN PTR

a23-56-238-88deploystaticakamaitechnologiescom
DNS

172.210.232.199.in-addr.arpa

Remote address:

8.8.8.8:53

Request

172.210.232.199.in-addr.arpa

IN PTR

Response
DNS

13.227.111.52.in-addr.arpa

Remote address:

8.8.8.8:53

Request

13.227.111.52.in-addr.arpa

IN PTR

Response
DNS

73.144.22.2.in-addr.arpa

Remote address:

8.8.8.8:53

Request

73.144.22.2.in-addr.arpa

IN PTR

Response

73.144.22.2.in-addr.arpa

IN PTR

a2-22-144-73deploystaticakamaitechnologiescom
DNS

7.173.189.20.in-addr.arpa

Remote address:

8.8.8.8:53

Request

7.173.189.20.in-addr.arpa

IN PTR

Response

185.215.113.206:80

44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883.exe

260 B
5

8.8.8.8:53

8.8.8.8.in-addr.arpa

dns

66 B
90 B
1
1

DNS Request

8.8.8.8.in-addr.arpa
8.8.8.8:53

104.219.191.52.in-addr.arpa

dns

73 B
147 B
1
1

DNS Request

104.219.191.52.in-addr.arpa
8.8.8.8:53

81.144.22.2.in-addr.arpa

dns

70 B
133 B
1
1

DNS Request

81.144.22.2.in-addr.arpa
8.8.8.8:53

71.31.126.40.in-addr.arpa

dns

71 B
157 B
1
1

DNS Request

71.31.126.40.in-addr.arpa
8.8.8.8:53

5.114.82.104.in-addr.arpa

dns

71 B
135 B
1
1

DNS Request

5.114.82.104.in-addr.arpa
8.8.8.8:53

217.106.137.52.in-addr.arpa

dns

73 B
147 B
1
1

DNS Request

217.106.137.52.in-addr.arpa
8.8.8.8:53

50.23.12.20.in-addr.arpa

dns

70 B
156 B
1
1

DNS Request

50.23.12.20.in-addr.arpa
8.8.8.8:53

15.164.165.52.in-addr.arpa

dns

72 B
146 B
1
1

DNS Request

15.164.165.52.in-addr.arpa
8.8.8.8:53

88.238.56.23.in-addr.arpa

dns

71 B
135 B
1
1

DNS Request

88.238.56.23.in-addr.arpa
8.8.8.8:53

172.210.232.199.in-addr.arpa

dns

74 B
128 B
1
1

DNS Request

172.210.232.199.in-addr.arpa
8.8.8.8:53

13.227.111.52.in-addr.arpa

dns

72 B
158 B
1
1

DNS Request

13.227.111.52.in-addr.arpa
8.8.8.8:53

73.144.22.2.in-addr.arpa

dns

70 B
133 B
1
1

DNS Request

73.144.22.2.in-addr.arpa
8.8.8.8:53

7.173.189.20.in-addr.arpa

dns

71 B
157 B
1
1

DNS Request

7.173.189.20.in-addr.arpa

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/3636-0-0x0000000000CC0000-0x0000000001388000-memory.dmp

Filesize
6.8MB

Download
memory/3636-1-0x00000000778E4000-0x00000000778E6000-memory.dmp

Filesize
8KB

Download
memory/3636-2-0x0000000000CC1000-0x0000000000CD8000-memory.dmp

Filesize
92KB

Download
memory/3636-3-0x0000000000CC0000-0x0000000001388000-memory.dmp

Filesize
6.8MB

Download
memory/3636-4-0x0000000000CC0000-0x0000000001388000-memory.dmp

Filesize
6.8MB

Download
memory/3636-5-0x0000000000CC0000-0x0000000001388000-memory.dmp

Filesize
6.8MB

Download
memory/3636-6-0x0000000000CC0000-0x0000000001388000-memory.dmp

Filesize
6.8MB

Download
memory/3636-7-0x0000000000CC0000-0x0000000001388000-memory.dmp

Filesize
6.8MB

Download
memory/3636-8-0x0000000000CC0000-0x0000000001388000-memory.dmp

Filesize
6.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

MITRE ATT&CK Enterprise v15

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