stealc | 2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee

General

Target

2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee.exe
Size

1.8MB
MD5

aea0e90c3cc7a1096274e6f5d467afb2
SHA1

3c5ef2f989740f48b61edfda747a7b079e27e0c9
SHA256

2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee
SHA512

cac50e55de56b9e0d5d9dab18cfdf9fd701e4d263340e7fac08b9caf3883c77d0e8141a7bbef90f2440a41179000b2863b59b92cd42bdd9183a066e1c20c5838
SSDEEP

24576:FBfuZfeq6sVO6hTdtTF+TxMoxQH1Tj4wtjYZH1DmoYYzi3WH45yv+OueSJhm9e:F7qFHJtTF+TxMoxc1TU+j+dAzGwlrh

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://steamcommunity.com/profiles/76561199689717899

https://t.me/copterwin

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 14 IoCs

stealer

Processes:

resource	yara_rule
behavioral1/memory/1792-1-0x00000000032F0000-0x0000000003439000-memory.dmp	family_vidar_v7
behavioral1/memory/2196-17-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2196-22-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2196-23-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2196-18-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2196-15-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2196-162-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2196-181-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2196-212-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2196-231-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2196-311-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2196-426-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2196-445-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2196-484-0x0000000000400000-0x0000000000646000-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

Processes:

kat193B.tmp

pid process

2196 kat193B.tmp

pid	process
2196	kat193B.tmp

Loads dropped DLL 2 IoCs

Processes:

2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee.exe

pid	process
1792	2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee.exe
1792	2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee.exe

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
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
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

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

Processes:

2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee.exe

description	pid	process	target process
PID 1792 set thread context of 2196	1792	2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee.exe	kat193B.tmp

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
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

Processes:

kat193B.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat193B.tmp
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

2060 timeout.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat193B.tmp

pid	process
2060	timeout.exe

Modifies system certificate store 2 TTPs 3 IoCs

evasion spyware trojan

Install Root Certificate

T1553.004

Modify Registry

T1112

Processes:

kat193B.tmp

description	ioc	process
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\5FB7EE0633E259DBAD0C4C9AE6D38F1A61C7DC25\Blob = 190000000100000010000000ba4f3972e7aed9dccdc210db59da13c90300000001000000140000005fb7ee0633e259dbad0c4c9ae6d38f1a61c7dc251d00000001000000100000008f76b981d528ad4770088245e2031b630b0000000100000012000000440069006700690043006500720074000000140000000100000014000000b13ec36903f8bf4701d498261a0802ef63642bc35300000001000000230000003021301f06096086480186fd6c020130123010060a2b0601040182373c0101030200c0090000000100000034000000303206082b0601050507030106082b0601050507030206082b0601050507030406082b0601050507030306082b060105050703080f0000000100000014000000e35ef08d884f0a0ade2f75e96301ce6230f213a82000000001000000c9030000308203c5308202ada003020102021002ac5c266a0b409b8f0b79f2ae462577300d06092a864886f70d0101050500306c310b300906035504061302555331153013060355040a130c446967694365727420496e6331193017060355040b13107777772e64696769636572742e636f6d312b30290603550403132244696769436572742048696768204173737572616e636520455620526f6f74204341301e170d3036313131303030303030305a170d3331313131303030303030305a306c310b300906035504061302555331153013060355040a130c446967694365727420496e6331193017060355040b13107777772e64696769636572742e636f6d312b30290603550403132244696769436572742048696768204173737572616e636520455620526f6f7420434130820122300d06092a864886f70d01010105000382010f003082010a0282010100c6cce573e6fbd4bbe52d2d32a6dfe5813fc9cd2549b6712ac3d5943467a20a1cb05f69a640b1c4b7b28fd098a4a941593ad3dc94d63cdb7438a44acc4d2582f74aa5531238eef3496d71917e63b6aba65fc3a484f84f6251bef8c5ecdb3892e306e508910cc4284155fbcb5a89157e71e835bf4d72093dbe3a38505b77311b8db3c724459aa7ac6d00145a04b7ba13eb510a984141224e656187814150a6795c89de194a57d52ee65d1c532c7e98cd1a0616a46873d03404135ca171d35a7c55db5e64e13787305604e511b4298012f1793988a202117c2766b788b778f2ca0aa838ab0a64c2bf665d9584c1a1251e875d1a500b2012cc41bb6e0b5138b84bcb0203010001a3633061300e0603551d0f0101ff040403020186300f0603551d130101ff040530030101ff301d0603551d0e04160414b13ec36903f8bf4701d498261a0802ef63642bc3301f0603551d23041830168014b13ec36903f8bf4701d498261a0802ef63642bc3300d06092a864886f70d010105050003820101001c1a0697dcd79c9f3c886606085721db2147f82a67aabf183276401057c18af37ad911658e35fa9efc45b59ed94c314bb891e8432c8eb378cedbe3537971d6e5219401da55879a2464f68a66ccde9c37cda834b1699b23c89e78222b7043e35547316119ef58c5852f4e30f6a0311623c8e7e2651633cbbf1a1ba03df8ca5e8b318b6008892d0c065c52b7c4f90a98d1155f9f12be7c366338bd44a47fe4262b0ac497690de98ce2c01057b8c876129155f24869d8bc2a025b0f44d42031dbf4ba70265d90609ebc4b17092fb4cb1e4368c90727c1d25cf7ea21b968129c3c9cbf9efc805c9b63cdec47aa252767a037f300827d54d7a9f8e92e13a377e81f4a	kat193B.tmp
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\5FB7EE0633E259DBAD0C4C9AE6D38F1A61C7DC25	kat193B.tmp
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\5FB7EE0633E259DBAD0C4C9AE6D38F1A61C7DC25\Blob = 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	kat193B.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat193B.tmp

pid process

2196 kat193B.tmp
2196 kat193B.tmp

pid	process
2196	kat193B.tmp
2196	kat193B.tmp

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee.exekat193B.tmpcmd.exe

description	pid	process	target process
PID 1792 wrote to memory of 2196	1792	2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee.exe	kat193B.tmp
PID 1792 wrote to memory of 2196	1792	2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee.exe	kat193B.tmp
PID 1792 wrote to memory of 2196	1792	2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee.exe	kat193B.tmp
PID 1792 wrote to memory of 2196	1792	2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee.exe	kat193B.tmp
PID 1792 wrote to memory of 2196	1792	2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee.exe	kat193B.tmp
PID 1792 wrote to memory of 2196	1792	2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee.exe	kat193B.tmp
PID 1792 wrote to memory of 2196	1792	2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee.exe	kat193B.tmp
PID 1792 wrote to memory of 2196	1792	2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee.exe	kat193B.tmp
PID 1792 wrote to memory of 2196	1792	2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee.exe	kat193B.tmp
PID 2196 wrote to memory of 2640	2196	kat193B.tmp	cmd.exe
PID 2196 wrote to memory of 2640	2196	kat193B.tmp	cmd.exe
PID 2196 wrote to memory of 2640	2196	kat193B.tmp	cmd.exe
PID 2196 wrote to memory of 2640	2196	kat193B.tmp	cmd.exe
PID 2196 wrote to memory of 2544	2196	kat193B.tmp	cmd.exe
PID 2196 wrote to memory of 2544	2196	kat193B.tmp	cmd.exe
PID 2196 wrote to memory of 2544	2196	kat193B.tmp	cmd.exe
PID 2196 wrote to memory of 2544	2196	kat193B.tmp	cmd.exe
PID 2544 wrote to memory of 2060	2544	cmd.exe	timeout.exe
PID 2544 wrote to memory of 2060	2544	cmd.exe	timeout.exe
PID 2544 wrote to memory of 2060	2544	cmd.exe	timeout.exe
PID 2544 wrote to memory of 2060	2544	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee.exe
"C:\Users\Admin\AppData\Local\Temp\2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1792

C:\Users\Admin\AppData\Local\Temp\kat193B.tmp
C:\Users\Admin\AppData\Local\Temp\kat193B.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2196

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c start "" "C:\ProgramData\CBFIJEGIDB.exe"
3⤵
PID:2640

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat193B.tmp" & rd /s /q "C:\ProgramData\KKEHDBAEGIII" & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:2544

C:\Windows\SysWOW64\timeout.exe
timeout /t 10
4⤵
- Delays execution with timeout.exe
PID:2060

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Subvert Trust Controls

1

T1553

Install Root Certificate

Modify Registry

Credential Access

Unsecured Credentials

4

T1552

Credentials In Files

4

T1552.001

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

4

T1005

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\Cab2B95.tmp
Filesize
68KB

MD5
29f65ba8e88c063813cc50a4ea544e93

SHA1
05a7040d5c127e68c25d81cc51271ffb8bef3568

SHA256
1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184

SHA512
e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar2BC7.tmp
Filesize
177KB

MD5
435a9ac180383f9fa094131b173a2f7b

SHA1
76944ea657a9db94f9a4bef38f88c46ed4166983

SHA256
67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34

SHA512
1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a

Download Submit
\Users\Admin\AppData\Local\Temp\kat193B.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1792-20-0x0000000000400000-0x00000000005D1000-memory.dmp

Filesize
1.8MB

Download
memory/1792-1-0x00000000032F0000-0x0000000003439000-memory.dmp

Filesize
1.3MB

Download
memory/1792-0-0x0000000000220000-0x0000000000221000-memory.dmp

Filesize
4KB

Download
memory/2196-11-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2196-181-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2196-15-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2196-13-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2196-23-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2196-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2196-22-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2196-17-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2196-162-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2196-18-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2196-202-0x00000000288B0000-0x0000000028B0F000-memory.dmp

Filesize
2.4MB

Download
memory/2196-212-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2196-231-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2196-311-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2196-426-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2196-445-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2196-484-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads