stealc | 4f442d5f511fe820b75a49169785dac48fce1a19285372b47c5e4ab62209df1a

General

Target

5ab8c35b9e4d8ec58a8f6a2f5383042a.exe
Size

2.4MB
MD5

5ab8c35b9e4d8ec58a8f6a2f5383042a
SHA1

7a1d15fb3b9aff903d7c945c9f2b76e8b538e26a
SHA256

4f442d5f511fe820b75a49169785dac48fce1a19285372b47c5e4ab62209df1a
SHA512

598f024bcf11686c5aaeda6d56a7a4f67447ea7a82e8cc535c94c229ffba88d7ab2c879ce114f4647389e76890be34e1353a4a43f58a16427fc0bff8eae5b261
SSDEEP

49152:MgMB1gmd/0wYxmj02wfNQJGSLrp9+Wlbz1jiAkBAbdUHrU:i1bWJfNqG4nZxji/BAbdS

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

Detect Vidar Stealer 1 IoCs

stealer

resource	yara_rule
behavioral1/memory/2876-0-0x0000000000870000-0x0000000000F33000-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
2460	FHCGHJDBFI.exe

Loads dropped DLL 6 IoCs

pid	Process
2876	5ab8c35b9e4d8ec58a8f6a2f5383042a.exe
2876	5ab8c35b9e4d8ec58a8f6a2f5383042a.exe
2876	5ab8c35b9e4d8ec58a8f6a2f5383042a.exe
2008	WerFault.exe
2008	WerFault.exe
2008	WerFault.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 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
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2008	2460	WerFault.exe	30

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	5ab8c35b9e4d8ec58a8f6a2f5383042a.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1032	timeout.exe

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	5ab8c35b9e4d8ec58a8f6a2f5383042a.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\5FB7EE0633E259DBAD0C4C9AE6D38F1A61C7DC25\Blob = 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	5ab8c35b9e4d8ec58a8f6a2f5383042a.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\5FB7EE0633E259DBAD0C4C9AE6D38F1A61C7DC25\Blob = 190000000100000010000000ba4f3972e7aed9dccdc210db59da13c90300000001000000140000005fb7ee0633e259dbad0c4c9ae6d38f1a61c7dc251d00000001000000100000008f76b981d528ad4770088245e2031b630b0000000100000012000000440069006700690043006500720074000000140000000100000014000000b13ec36903f8bf4701d498261a0802ef63642bc35300000001000000230000003021301f06096086480186fd6c020130123010060a2b0601040182373c0101030200c0090000000100000034000000303206082b0601050507030106082b0601050507030206082b0601050507030406082b0601050507030306082b060105050703080f0000000100000014000000e35ef08d884f0a0ade2f75e96301ce6230f213a82000000001000000c9030000308203c5308202ada003020102021002ac5c266a0b409b8f0b79f2ae462577300d06092a864886f70d0101050500306c310b300906035504061302555331153013060355040a130c446967694365727420496e6331193017060355040b13107777772e64696769636572742e636f6d312b30290603550403132244696769436572742048696768204173737572616e636520455620526f6f74204341301e170d3036313131303030303030305a170d3331313131303030303030305a306c310b300906035504061302555331153013060355040a130c446967694365727420496e6331193017060355040b13107777772e64696769636572742e636f6d312b30290603550403132244696769436572742048696768204173737572616e636520455620526f6f7420434130820122300d06092a864886f70d01010105000382010f003082010a0282010100c6cce573e6fbd4bbe52d2d32a6dfe5813fc9cd2549b6712ac3d5943467a20a1cb05f69a640b1c4b7b28fd098a4a941593ad3dc94d63cdb7438a44acc4d2582f74aa5531238eef3496d71917e63b6aba65fc3a484f84f6251bef8c5ecdb3892e306e508910cc4284155fbcb5a89157e71e835bf4d72093dbe3a38505b77311b8db3c724459aa7ac6d00145a04b7ba13eb510a984141224e656187814150a6795c89de194a57d52ee65d1c532c7e98cd1a0616a46873d03404135ca171d35a7c55db5e64e13787305604e511b4298012f1793988a202117c2766b788b778f2ca0aa838ab0a64c2bf665d9584c1a1251e875d1a500b2012cc41bb6e0b5138b84bcb0203010001a3633061300e0603551d0f0101ff040403020186300f0603551d130101ff040530030101ff301d0603551d0e04160414b13ec36903f8bf4701d498261a0802ef63642bc3301f0603551d23041830168014b13ec36903f8bf4701d498261a0802ef63642bc3300d06092a864886f70d010105050003820101001c1a0697dcd79c9f3c886606085721db2147f82a67aabf183276401057c18af37ad911658e35fa9efc45b59ed94c314bb891e8432c8eb378cedbe3537971d6e5219401da55879a2464f68a66ccde9c37cda834b1699b23c89e78222b7043e35547316119ef58c5852f4e30f6a0311623c8e7e2651633cbbf1a1ba03df8ca5e8b318b6008892d0c065c52b7c4f90a98d1155f9f12be7c366338bd44a47fe4262b0ac497690de98ce2c01057b8c876129155f24869d8bc2a025b0f44d42031dbf4ba70265d90609ebc4b17092fb4cb1e4368c90727c1d25cf7ea21b968129c3c9cbf9efc805c9b63cdec47aa252767a037f300827d54d7a9f8e92e13a377e81f4a	5ab8c35b9e4d8ec58a8f6a2f5383042a.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2876	5ab8c35b9e4d8ec58a8f6a2f5383042a.exe
2876	5ab8c35b9e4d8ec58a8f6a2f5383042a.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2876 wrote to memory of 2460	2876	5ab8c35b9e4d8ec58a8f6a2f5383042a.exe	30
PID 2876 wrote to memory of 2460	2876	5ab8c35b9e4d8ec58a8f6a2f5383042a.exe	30
PID 2876 wrote to memory of 2460	2876	5ab8c35b9e4d8ec58a8f6a2f5383042a.exe	30
PID 2876 wrote to memory of 2460	2876	5ab8c35b9e4d8ec58a8f6a2f5383042a.exe	30
PID 2460 wrote to memory of 2008	2460	FHCGHJDBFI.exe	31
PID 2460 wrote to memory of 2008	2460	FHCGHJDBFI.exe	31
PID 2460 wrote to memory of 2008	2460	FHCGHJDBFI.exe	31
PID 2460 wrote to memory of 2008	2460	FHCGHJDBFI.exe	31
PID 2876 wrote to memory of 2508	2876	5ab8c35b9e4d8ec58a8f6a2f5383042a.exe	32
PID 2876 wrote to memory of 2508	2876	5ab8c35b9e4d8ec58a8f6a2f5383042a.exe	32
PID 2876 wrote to memory of 2508	2876	5ab8c35b9e4d8ec58a8f6a2f5383042a.exe	32
PID 2876 wrote to memory of 2508	2876	5ab8c35b9e4d8ec58a8f6a2f5383042a.exe	32
PID 2508 wrote to memory of 1032	2508	cmd.exe	34
PID 2508 wrote to memory of 1032	2508	cmd.exe	34
PID 2508 wrote to memory of 1032	2508	cmd.exe	34
PID 2508 wrote to memory of 1032	2508	cmd.exe	34

C:\Users\Admin\AppData\Local\Temp\5ab8c35b9e4d8ec58a8f6a2f5383042a.exe
"C:\Users\Admin\AppData\Local\Temp\5ab8c35b9e4d8ec58a8f6a2f5383042a.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2876
- C:\ProgramData\FHCGHJDBFI.exe
  "C:\ProgramData\FHCGHJDBFI.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:2460
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2460 -s 128
    3⤵
    - Loads dropped DLL
    - Program crash
    PID:2008
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\HDAFHIDGIJKJ" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2508
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 10
    3⤵
    - Delays execution with timeout.exe
    PID:1032

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

3

T1552

Credentials In Files

3

T1552.001

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

3

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

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\MetaData\94308059B57B3142E455B38A6EB92015

Filesize
342B

MD5
8ee76ef6dd9455a3cde82fef28177c85

SHA1
bd67cebd05d79ddf657b667501c9192853872dcf

SHA256
90320670f84320fff2f37e271796b6e1df9be4afe3d341c33dae93f3c0234317

SHA512
3e3061fc868ce3811a041ee44433a05517908f771025a7ce8c0919ce52654d974f54babf1853d5bd8aca615b90913ac66d40ff03b6d90b0a9dcc3ebb54dfe1a9

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar176E.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
\ProgramData\FHCGHJDBFI.exe

Filesize
753KB

MD5
05a1e80be42d093214516f6862c84ad9

SHA1
86dc07be2321f6dcba0036ae17bf5fe3073176ef

SHA256
90faf9068d0c5d240022de76001d344ff1714edfaeff88af7476f6adc6524aac

SHA512
5f884793c0b68935e7cf8b1c8dbc2980aedcd4837048251806d6a512d66231eeeacf68da1632061de609ee68f59f180708e07cbc1518542d3f1a3aab974aedf5

Download Submit
memory/2460-418-0x0000000000180000-0x0000000000181000-memory.dmp

Filesize
4KB

Download
memory/2876-0-0x0000000000870000-0x0000000000F33000-memory.dmp

Filesize
6.8MB

Download
memory/2876-192-0x0000000020F10000-0x000000002116F000-memory.dmp

Filesize
2.4MB

Download

Analysis

Sharing