vidar | b679a6acd8f938b51a635855ea772b6c98ba25d165c71a5082d4cedf90c9af82

General

Target

25a15af2bab20ec576f778acfde2f027d31b2c1c389ab707360e8397724d7f66.exe
Size

390KB
MD5

9c11f8b0f55dfbcd4b67c6a56fb0f11f
SHA1

040437d898ccf617506617f9d12b364ae8784727
SHA256

25a15af2bab20ec576f778acfde2f027d31b2c1c389ab707360e8397724d7f66
SHA512

5da2d3d68f5a58aa7323abfc175452ea7e5b6f94526a5f6ecb4a0aef6b2374475825abb25f42ff82f3af30e1dcf85fe5ba7778e61796f2a84152e317f016b118
SSDEEP

12288:mfeZUvaamvY7kmA7YJCMKKvzKbkL+Kawd:AVpmQntvKKvAxBW

Score

10^/10

vidar fc0stn discovery stealer

Malware Config

Extracted

Family

vidar

Botnet

fc0stn

C2

https://t.me/w0ctzn

https://steamcommunity.com/profiles/76561199817305251

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:131.0) Gecko/20100101 Firefox/131.0

Signatures

Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
Vidar family
vidar

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1720 set thread context of 2100	1720	25a15af2bab20ec576f778acfde2f027d31b2c1c389ab707360e8397724d7f66.exe	30

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1684	1720	WerFault.exe	29

System Location Discovery: System Language Discovery 1 TTPs 2 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	25a15af2bab20ec576f778acfde2f027d31b2c1c389ab707360e8397724d7f66.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	25a15af2bab20ec576f778acfde2f027d31b2c1c389ab707360e8397724d7f66.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1720 wrote to memory of 2100	1720	25a15af2bab20ec576f778acfde2f027d31b2c1c389ab707360e8397724d7f66.exe	30
PID 1720 wrote to memory of 2100	1720	25a15af2bab20ec576f778acfde2f027d31b2c1c389ab707360e8397724d7f66.exe	30
PID 1720 wrote to memory of 2100	1720	25a15af2bab20ec576f778acfde2f027d31b2c1c389ab707360e8397724d7f66.exe	30
PID 1720 wrote to memory of 2100	1720	25a15af2bab20ec576f778acfde2f027d31b2c1c389ab707360e8397724d7f66.exe	30
PID 1720 wrote to memory of 2100	1720	25a15af2bab20ec576f778acfde2f027d31b2c1c389ab707360e8397724d7f66.exe	30
PID 1720 wrote to memory of 2100	1720	25a15af2bab20ec576f778acfde2f027d31b2c1c389ab707360e8397724d7f66.exe	30
PID 1720 wrote to memory of 2100	1720	25a15af2bab20ec576f778acfde2f027d31b2c1c389ab707360e8397724d7f66.exe	30
PID 1720 wrote to memory of 2100	1720	25a15af2bab20ec576f778acfde2f027d31b2c1c389ab707360e8397724d7f66.exe	30
PID 1720 wrote to memory of 2100	1720	25a15af2bab20ec576f778acfde2f027d31b2c1c389ab707360e8397724d7f66.exe	30
PID 1720 wrote to memory of 2100	1720	25a15af2bab20ec576f778acfde2f027d31b2c1c389ab707360e8397724d7f66.exe	30
PID 1720 wrote to memory of 2100	1720	25a15af2bab20ec576f778acfde2f027d31b2c1c389ab707360e8397724d7f66.exe	30
PID 1720 wrote to memory of 2100	1720	25a15af2bab20ec576f778acfde2f027d31b2c1c389ab707360e8397724d7f66.exe	30
PID 1720 wrote to memory of 1684	1720	25a15af2bab20ec576f778acfde2f027d31b2c1c389ab707360e8397724d7f66.exe	31
PID 1720 wrote to memory of 1684	1720	25a15af2bab20ec576f778acfde2f027d31b2c1c389ab707360e8397724d7f66.exe	31
PID 1720 wrote to memory of 1684	1720	25a15af2bab20ec576f778acfde2f027d31b2c1c389ab707360e8397724d7f66.exe	31
PID 1720 wrote to memory of 1684	1720	25a15af2bab20ec576f778acfde2f027d31b2c1c389ab707360e8397724d7f66.exe	31

C:\Users\Admin\AppData\Local\Temp\25a15af2bab20ec576f778acfde2f027d31b2c1c389ab707360e8397724d7f66.exe
"C:\Users\Admin\AppData\Local\Temp\25a15af2bab20ec576f778acfde2f027d31b2c1c389ab707360e8397724d7f66.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1720
- C:\Users\Admin\AppData\Local\Temp\25a15af2bab20ec576f778acfde2f027d31b2c1c389ab707360e8397724d7f66.exe
  "C:\Users\Admin\AppData\Local\Temp\25a15af2bab20ec576f778acfde2f027d31b2c1c389ab707360e8397724d7f66.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2100
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1720 -s 500
  2⤵
  - Program crash
  PID:1684

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\CabA0D3.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\TarA0E6.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
memory/1720-0-0x000000007477E000-0x000000007477F000-memory.dmp

Filesize
4KB

Download
memory/1720-1-0x0000000000E00000-0x0000000000E68000-memory.dmp

Filesize
416KB

Download
memory/1720-61-0x0000000074770000-0x0000000074E5E000-memory.dmp

Filesize
6.9MB

Download
memory/1720-59-0x000000007477E000-0x000000007477F000-memory.dmp

Filesize
4KB

Download
memory/1720-22-0x0000000074770000-0x0000000074E5E000-memory.dmp

Filesize
6.9MB

Download
memory/2100-5-0x0000000000400000-0x0000000000460000-memory.dmp

Filesize
384KB

Download
memory/2100-11-0x0000000000400000-0x0000000000460000-memory.dmp

Filesize
384KB

Download
memory/2100-9-0x0000000000400000-0x0000000000460000-memory.dmp

Filesize
384KB

Download
memory/2100-3-0x0000000000400000-0x0000000000460000-memory.dmp

Filesize
384KB

Download
memory/2100-21-0x0000000000400000-0x0000000000460000-memory.dmp

Filesize
384KB

Download
memory/2100-23-0x0000000000400000-0x0000000000460000-memory.dmp

Filesize
384KB

Download
memory/2100-13-0x0000000000400000-0x0000000000460000-memory.dmp

Filesize
384KB

Download
memory/2100-15-0x0000000000400000-0x0000000000460000-memory.dmp

Filesize
384KB

Download
memory/2100-17-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/2100-7-0x0000000000400000-0x0000000000460000-memory.dmp

Filesize
384KB

Download
memory/2100-60-0x0000000000400000-0x0000000000460000-memory.dmp

Filesize
384KB

Download
memory/2100-20-0x0000000000400000-0x0000000000460000-memory.dmp

Filesize
384KB

Download

Analysis

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