stealc | b1986c8278032b29898b10b350340891c3282f7e2662f97f5677994478497a18

General

Target

b1986c8278032b29898b10b350340891c3282f7e2662f97f5677994478497a18.exe
Size

2.5MB
MD5

0b614966d35a836d2ef5cec7504455ef
SHA1

b535567d5e9a33a19045bdc8ca4bce9aeaccd840
SHA256

b1986c8278032b29898b10b350340891c3282f7e2662f97f5677994478497a18
SHA512

f1c1569fa1c2aff118beb18370d72209109fbce7249ecc15262a9728b38eee7a06cd8609b0b5f8a80c64cf2dd269f581d3131e172eea40f4cc6d63b84837dad8
SSDEEP

49152:+BX5/0mLBI1JVbJtTF+TxMoxc1TU+j+dAzGRX+:+BX5/0mAFtIuoITsdZ

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

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 10 IoCs

stealer

resource	yara_rule
behavioral1/memory/2356-1-0x00000000033A0000-0x00000000034EC000-memory.dmp	family_vidar_v7
behavioral1/memory/1216-15-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral1/memory/1216-24-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral1/memory/1216-19-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral1/memory/1216-22-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral1/memory/1216-17-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral1/memory/1216-193-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral1/memory/1216-218-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral1/memory/1216-255-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral1/memory/1216-283-0x0000000000400000-0x0000000000649000-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
Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
1216	kat638.tmp

Loads dropped DLL 2 IoCs

pid	Process
2356	b1986c8278032b29898b10b350340891c3282f7e2662f97f5677994478497a18.exe
2356	b1986c8278032b29898b10b350340891c3282f7e2662f97f5677994478497a18.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
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 SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2356 set thread context of 1216	2356	b1986c8278032b29898b10b350340891c3282f7e2662f97f5677994478497a18.exe	28

Checks processor information in registry 2 TTPs 1 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	kat638.tmp

Modifies system certificate store 2 TTPs 3 IoCs

evasion spyware trojan

Install Root Certificate

T1553.004

Modify Registry

T1112

description	ioc	Process
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\5FB7EE0633E259DBAD0C4C9AE6D38F1A61C7DC25\Blob = 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	kat638.tmp
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\5FB7EE0633E259DBAD0C4C9AE6D38F1A61C7DC25	kat638.tmp
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\5FB7EE0633E259DBAD0C4C9AE6D38F1A61C7DC25\Blob = 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	kat638.tmp

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1216	kat638.tmp

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2356 wrote to memory of 1216	2356	b1986c8278032b29898b10b350340891c3282f7e2662f97f5677994478497a18.exe	28
PID 2356 wrote to memory of 1216	2356	b1986c8278032b29898b10b350340891c3282f7e2662f97f5677994478497a18.exe	28
PID 2356 wrote to memory of 1216	2356	b1986c8278032b29898b10b350340891c3282f7e2662f97f5677994478497a18.exe	28
PID 2356 wrote to memory of 1216	2356	b1986c8278032b29898b10b350340891c3282f7e2662f97f5677994478497a18.exe	28
PID 2356 wrote to memory of 1216	2356	b1986c8278032b29898b10b350340891c3282f7e2662f97f5677994478497a18.exe	28
PID 2356 wrote to memory of 1216	2356	b1986c8278032b29898b10b350340891c3282f7e2662f97f5677994478497a18.exe	28
PID 2356 wrote to memory of 1216	2356	b1986c8278032b29898b10b350340891c3282f7e2662f97f5677994478497a18.exe	28
PID 2356 wrote to memory of 1216	2356	b1986c8278032b29898b10b350340891c3282f7e2662f97f5677994478497a18.exe	28
PID 2356 wrote to memory of 1216	2356	b1986c8278032b29898b10b350340891c3282f7e2662f97f5677994478497a18.exe	28

C:\Users\Admin\AppData\Local\Temp\b1986c8278032b29898b10b350340891c3282f7e2662f97f5677994478497a18.exe
"C:\Users\Admin\AppData\Local\Temp\b1986c8278032b29898b10b350340891c3282f7e2662f97f5677994478497a18.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2356
- C:\Users\Admin\AppData\Local\Temp\kat638.tmp
  C:\Users\Admin\AppData\Local\Temp\kat638.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Modifies system certificate store
  - Suspicious behavior: EnumeratesProcesses
  PID:1216

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Subvert Trust Controls

1

T1553

Install Root Certificate

1

T1553.004

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

2

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\F0ACCF77CDCBFF39F6191887F6D2D357

Filesize
1KB

MD5
a266bb7dcc38a562631361bbf61dd11b

SHA1
3b1efd3a66ea28b16697394703a72ca340a05bd5

SHA256
df545bf919a2439c36983b54cdfc903dfa4f37d3996d8d84b4c31eec6f3c163e

SHA512
0da8ef4f8f6ed3d16d2bc8eb816b9e6e1345dfe2d91160196c47e6149a1d6aedaafadcefd66acdea7f72dcf0832770192ceac15b0c559c4ccc2c0e5581d5aefc

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

Filesize
342B

MD5
04531ce1210a8547b790585eaa807d36

SHA1
66d7571368f9dd159e9c25e7a3946717559a1360

SHA256
19c9b944de74dca37495534a378348e10bc4c86a52290c7444325419ae296f7a

SHA512
625f1edca9080656ca286e3f0a34c104dfaf515af36337473c3bb3cbba497812bcaa4597dd5553ea3c3bc46dbbe2989ee3fe90ad9f4c26fd2b0b0df5f15406fb

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\F0ACCF77CDCBFF39F6191887F6D2D357

Filesize
242B

MD5
79319103b2ff1a75c9fbb4065a64e0d4

SHA1
9968f716a621f894a4dbf72beadc038665af0e6d

SHA256
0588a9c8da5d8a20bcc5e2336fb62631630b2745f0dd6da21b8f4ffb4be250c3

SHA512
95db0f8f681f923115a92cd74b92a394404784c6af766881380303cf11ba89f79c807966ca29edbc631723f8fe9c045a3086a5d58466b27c6bc0aad5f4cfb59d

Download Submit
C:\Users\Admin\AppData\Local\Temp\TarC36.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
\Users\Admin\AppData\Local\Temp\kat638.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1216-11-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/1216-245-0x0000000028850000-0x0000000028AAF000-memory.dmp

Filesize
2.4MB

Download
memory/1216-22-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/1216-17-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/1216-283-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/1216-9-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/1216-24-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/1216-19-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/1216-13-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/1216-15-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/1216-255-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/1216-193-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/1216-218-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/2356-23-0x0000000000400000-0x000000000067C000-memory.dmp

Filesize
2.5MB

Download
memory/2356-1-0x00000000033A0000-0x00000000034EC000-memory.dmp

Filesize
1.3MB

Download
memory/2356-0-0x0000000000220000-0x0000000000221000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads