stealc | 4f442d5f511fe820b75a49169785dac48fce1a19285372b47c5e4ab62209df1a

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
09/06/2024, 15:58

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General

Target
5ab8c35b9e4d8ec58a8f6a2f5383042a.exe
Size 2.4MB
Sample240609-tejt3ach42
SHA256 4f442d5f511fe820b75a49169785dac48fce1a19285372b47c5e4ab62209df1a
MD5 5ab8c35b9e4d8ec58a8f6a2f5383042a
SHA1 7a1d15fb3b9aff903d7c945c9f2b76e8b538e26a
SHA512 598f024bcf11686c5aaeda6d56a7a4f67447ea7a82e8cc535c94c229ffba88d7ab2c879ce114f4647389e76890be34e1353a4a43f58a16427fc0bff8eae5b261
SSDEEP 49152:MgMB1gmd/0wYxmj02wfNQJGSLrp9+Wlbz1jiAkBAbdUHrU:i1bWJfNqG4nZxji/BAbdS
MD5 SHA1 SHA512 SSDEEP

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
behavioral2/memory/232-0-0x0000000000AF0000-0x00000000011B3000-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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	5ab8c35b9e4d8ec58a8f6a2f5383042a.exe

Executes dropped EXE 1 IoCs

pid	Process
4112	KECGHIJDGC.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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4112 set thread context of 632	4112	KECGHIJDGC.exe	88

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

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
628	timeout.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
232	5ab8c35b9e4d8ec58a8f6a2f5383042a.exe
232	5ab8c35b9e4d8ec58a8f6a2f5383042a.exe
232	5ab8c35b9e4d8ec58a8f6a2f5383042a.exe
232	5ab8c35b9e4d8ec58a8f6a2f5383042a.exe
632	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	632	RegAsm.exe
Token: SeBackupPrivilege	632	RegAsm.exe
Token: SeSecurityPrivilege	632	RegAsm.exe
Token: SeSecurityPrivilege	632	RegAsm.exe
Token: SeSecurityPrivilege	632	RegAsm.exe
Token: SeSecurityPrivilege	632	RegAsm.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 232 wrote to memory of 4112	232	5ab8c35b9e4d8ec58a8f6a2f5383042a.exe	85
PID 232 wrote to memory of 4112	232	5ab8c35b9e4d8ec58a8f6a2f5383042a.exe	85
PID 232 wrote to memory of 4112	232	5ab8c35b9e4d8ec58a8f6a2f5383042a.exe	85
PID 4112 wrote to memory of 5100	4112	KECGHIJDGC.exe	87
PID 4112 wrote to memory of 5100	4112	KECGHIJDGC.exe	87
PID 4112 wrote to memory of 5100	4112	KECGHIJDGC.exe	87
PID 4112 wrote to memory of 632	4112	KECGHIJDGC.exe	88
PID 4112 wrote to memory of 632	4112	KECGHIJDGC.exe	88
PID 4112 wrote to memory of 632	4112	KECGHIJDGC.exe	88
PID 4112 wrote to memory of 632	4112	KECGHIJDGC.exe	88
PID 4112 wrote to memory of 632	4112	KECGHIJDGC.exe	88
PID 4112 wrote to memory of 632	4112	KECGHIJDGC.exe	88
PID 4112 wrote to memory of 632	4112	KECGHIJDGC.exe	88
PID 4112 wrote to memory of 632	4112	KECGHIJDGC.exe	88
PID 232 wrote to memory of 3664	232	5ab8c35b9e4d8ec58a8f6a2f5383042a.exe	92
PID 232 wrote to memory of 3664	232	5ab8c35b9e4d8ec58a8f6a2f5383042a.exe	92
PID 232 wrote to memory of 3664	232	5ab8c35b9e4d8ec58a8f6a2f5383042a.exe	92
PID 3664 wrote to memory of 628	3664	cmd.exe	94
PID 3664 wrote to memory of 628	3664	cmd.exe	94
PID 3664 wrote to memory of 628	3664	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\5ab8c35b9e4d8ec58a8f6a2f5383042a.exe
"C:\Users\Admin\AppData\Local\Temp\5ab8c35b9e4d8ec58a8f6a2f5383042a.exe"
1⤵
- Checks computer location settings
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:232
- C:\ProgramData\KECGHIJDGC.exe
  "C:\ProgramData\KECGHIJDGC.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:4112
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
    3⤵
    PID:5100
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:632
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\GIJEGDAKEHJE" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3664
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 10
    3⤵
    - Delays execution with timeout.exe
    PID:628

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

KECGHIJDGC.exe

Path C:\ProgramData\KECGHIJDGC.exe
Size 753KB
SHA256 90faf9068d0c5d240022de76001d344ff1714edfaeff88af7476f6adc6524aac
MD5 05a1e80be42d093214516f6862c84ad9
SHA1 86dc07be2321f6dcba0036ae17bf5fe3073176ef
SHA512 5f884793c0b68935e7cf8b1c8dbc2980aedcd4837048251806d6a512d66231eeeacf68da1632061de609ee68f59f180708e07cbc1518542d3f1a3aab974aedf5
SSDEEP 12288:nS+kRiPgBCMMLuUVYTGrGrAMUgT07JY6nvz8FUWatQ53rNLIEO:tTgBr8TVGGrXET07e6nvz8FUWatQ5p8t
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/232-0-0x0000000000AF0000-0x00000000011B3000-memory.dmp

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memory/232-7-0x000000001C2E0000-0x000000001C53F000-memory.dmp

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memory/632-64-0x0000000008660000-0x000000000876A000-memory.dmp

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memory/632-66-0x0000000008600000-0x000000000863C000-memory.dmp

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memory/632-59-0x0000000005DE0000-0x0000000006384000-memory.dmp

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memory/632-60-0x0000000005830000-0x00000000058C2000-memory.dmp

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memory/632-61-0x0000000071E20000-0x00000000725D0000-memory.dmp

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memory/632-62-0x0000000003350000-0x000000000335A000-memory.dmp

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memory/632-63-0x0000000008B10000-0x0000000009128000-memory.dmp

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memory/632-57-0x0000000000400000-0x0000000000480000-memory.dmp

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memory/632-65-0x00000000085A0000-0x00000000085B2000-memory.dmp

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memory/632-58-0x0000000071E2E000-0x0000000071E2F000-memory.dmp

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memory/632-67-0x0000000008770000-0x00000000087BC000-memory.dmp

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memory/632-68-0x00000000088F0000-0x0000000008956000-memory.dmp

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memory/632-69-0x0000000009230000-0x00000000092A6000-memory.dmp

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memory/632-70-0x0000000008AD0000-0x0000000008AEE000-memory.dmp

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memory/632-71-0x000000000A770000-0x000000000A932000-memory.dmp

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memory/632-72-0x000000000AE70000-0x000000000B39C000-memory.dmp

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memory/632-74-0x0000000071E20000-0x00000000725D0000-memory.dmp

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