stealc | d8227944a7143a04cbd1a443d704fa1df108cccc78370c9f00756587989323ec

Analysis

max time kernel
7s
max time network
17s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
07/06/2024, 01:48

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General

Target
d8227944a7143a04cbd1a443d704fa1df108cccc78370c9f00756587989323ec.exe
Size 2.4MB
Sample240607-b8czhagg39
SHA256 d8227944a7143a04cbd1a443d704fa1df108cccc78370c9f00756587989323ec
MD5 562687a84496956e4fa01811c02f45b4
SHA1 926276d1633db57cdec97f26c1201dfd110048b4
SHA512 9f42704656bf60b3e6a45722dde3f1e56d274333487a305618038c7ea18affbed1ffdfe580cc8e42589f17d3eb8691b5c3135254824f22cdddd830ae0d2b2c75
SSDEEP 49152:wQc81KnB/a/hNT/dpYa8aesY3Ot4N7G/:wDta/hNT/dpn0etD/
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

stealc vidar stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

https://t.me/ta904ek
https://steamcommunity.com/profiles/76561199695752269

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0

Signatures

Detect Vidar Stealer 9 IoCs

stealer

resource	yara_rule
behavioral1/memory/2916-2-0x00000000032C0000-0x000000000340C000-memory.dmp	family_vidar_v7
behavioral1/memory/2688-17-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral1/memory/2688-24-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral1/memory/2688-23-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral1/memory/2688-19-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral1/memory/2688-15-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral1/memory/2688-172-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral1/memory/2688-213-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral1/memory/2688-247-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar

Executes dropped EXE 1 IoCs

pid	Process
2688	katC31.tmp

Loads dropped DLL 2 IoCs

pid	Process
2916	d8227944a7143a04cbd1a443d704fa1df108cccc78370c9f00756587989323ec.exe
2916	d8227944a7143a04cbd1a443d704fa1df108cccc78370c9f00756587989323ec.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2916 set thread context of 2688	2916	d8227944a7143a04cbd1a443d704fa1df108cccc78370c9f00756587989323ec.exe	28

Modifies system certificate store 2 TTPs 3 IoCs

evasion spyware trojan

Install Root Certificate

T1553.004

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\5FB7EE0633E259DBAD0C4C9AE6D38F1A61C7DC25	katC31.tmp
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\5FB7EE0633E259DBAD0C4C9AE6D38F1A61C7DC25\Blob = 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	katC31.tmp
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\5FB7EE0633E259DBAD0C4C9AE6D38F1A61C7DC25\Blob = 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	katC31.tmp

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2916 wrote to memory of 2688	2916	d8227944a7143a04cbd1a443d704fa1df108cccc78370c9f00756587989323ec.exe	28
PID 2916 wrote to memory of 2688	2916	d8227944a7143a04cbd1a443d704fa1df108cccc78370c9f00756587989323ec.exe	28
PID 2916 wrote to memory of 2688	2916	d8227944a7143a04cbd1a443d704fa1df108cccc78370c9f00756587989323ec.exe	28
PID 2916 wrote to memory of 2688	2916	d8227944a7143a04cbd1a443d704fa1df108cccc78370c9f00756587989323ec.exe	28
PID 2916 wrote to memory of 2688	2916	d8227944a7143a04cbd1a443d704fa1df108cccc78370c9f00756587989323ec.exe	28
PID 2916 wrote to memory of 2688	2916	d8227944a7143a04cbd1a443d704fa1df108cccc78370c9f00756587989323ec.exe	28
PID 2916 wrote to memory of 2688	2916	d8227944a7143a04cbd1a443d704fa1df108cccc78370c9f00756587989323ec.exe	28
PID 2916 wrote to memory of 2688	2916	d8227944a7143a04cbd1a443d704fa1df108cccc78370c9f00756587989323ec.exe	28
PID 2916 wrote to memory of 2688	2916	d8227944a7143a04cbd1a443d704fa1df108cccc78370c9f00756587989323ec.exe	28

C:\Users\Admin\AppData\Local\Temp\d8227944a7143a04cbd1a443d704fa1df108cccc78370c9f00756587989323ec.exe
"C:\Users\Admin\AppData\Local\Temp\d8227944a7143a04cbd1a443d704fa1df108cccc78370c9f00756587989323ec.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2916
- C:\Users\Admin\AppData\Local\Temp\katC31.tmp
  C:\Users\Admin\AppData\Local\Temp\katC31.tmp
  2⤵
  - Executes dropped EXE
  - Modifies system certificate store
  PID:2688

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Subvert Trust Controls

T1553

Install Root Certificate

T1553.004

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

94308059B57B3142E455B38A6EB92015

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
Size 70KB
SHA256 b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f
MD5 49aebf8cbd62d92ac215b2923fb1b9f5
SHA1 1723be06719828dda65ad804298d0431f6aff976
SHA512 bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b
SSDEEP 1536:gc257bHnClJ3v5mnAQEBP+bfnW8Ctl8G1G4eu76NWDdB34w18R5cBWcJAm68+Q:gp2ld5jPqW8LgeulxB3fgcEfDQ
MD5 SHA1 SHA512 SSDEEP

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94308059B57B3142E455B38A6EB92015

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Size 342B
SHA256 56f1af5faf9039cc42cd35e7c10f4439ea353e7a5471b6e61fd0e929809c7fea
MD5 bb8707c8921487f7e8d3de06fce831f8
SHA1 bcfc5fa47c8a6e94b12b1ec082333edb31664191
SHA512 b61f69e0397f1a7a44e46cb2c3ded94a11ea7993034b43079a1b2c5dd4e37dae25df17a8d4c6c05fdf5a20e37c9803d53fc9b26c4eb4b0577f55877d48597f70
MD5 SHA1 SHA512

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Tar1849.tmp

Path C:\Users\Admin\AppData\Local\Temp\Tar1849.tmp
Size 181KB
SHA256 8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8
MD5 4ea6026cf93ec6338144661bf1202cd1
SHA1 a1dec9044f750ad887935a01430bf49322fbdcb7
SHA512 6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b
SSDEEP 1536:aAZw/J+lCUsTRvsqgCyqWlUDNWdm1wpSru2A0XwjY/z02DTr3rmt6mZ:as2J+qTR0XCy/dmASru2AijbdG
MD5 SHA1 SHA512 SSDEEP

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katC31.tmp

Path \Users\Admin\AppData\Local\Temp\katC31.tmp
Size 861KB
SHA256 6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
MD5 66064dbdb70a5eb15ebf3bf65aba254b
SHA1 0284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA512 b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f
SSDEEP 24576:o0ESdQpglO1CxDyawn27h+9hrlgKQY9SGcZwCdTp:o0RIglO1CuL9VNcaCd9
MD5 SHA1 SHA512 SSDEEP

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memory/2688-172-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/2688-13-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/2688-24-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/2688-23-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/2688-19-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/2688-11-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/2688-15-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/2688-247-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/2688-17-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/2688-9-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/2688-226-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/2688-215-0x000000001E0B0000-0x000000001E30F000-memory.dmp

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memory/2688-213-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/2916-0-0x00000000003A0000-0x00000000003A1000-memory.dmp

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memory/2916-2-0x00000000032C0000-0x000000000340C000-memory.dmp

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memory/2916-21-0x0000000000400000-0x0000000000663000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads