stealc | 00058eb4fb0f99a87f3b6d186cc4928497aad4d585feb0409c17a93e1e50d839

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
11/06/2024, 02:59

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General

Target
d8cbbb545c3b804cd8ac1f861b18852761a987693650478fb01ae98538df9741.exe
Size 2.4MB
Sample240611-dg1mlaselp
SHA256 d8cbbb545c3b804cd8ac1f861b18852761a987693650478fb01ae98538df9741
MD5 913ffffe973462ca717e6d6a35435f05
SHA1 f60417a8f4ce340251f855a3c7d1932debddf6e2
SHA512 c044047ff860ee688a6fc5c9e160fccfbf9924e1d00d43c365f2603eaa5ad2d8159e73f20e752b52f569d7716e554d04b8f55cd9ad1775ae0bb62e15a421e1be
SSDEEP 49152:Et9lTickDxB5/C22m7GoKwZj3Xtn/gumuRIueEI:kl+cM5/2m7GoKczphZRK
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/3636-0-0x0000000000F70000-0x000000000163F000-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-1-5-21-540404634-651139247-2967210625-1000\Control Panel\International\Geo\Nation	d8cbbb545c3b804cd8ac1f861b18852761a987693650478fb01ae98538df9741.exe

Executes dropped EXE 1 IoCs

pid	Process
444	AAKEGIJEHJ.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 444 set thread context of 400	444	AAKEGIJEHJ.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	d8cbbb545c3b804cd8ac1f861b18852761a987693650478fb01ae98538df9741.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4532	timeout.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
3636	d8cbbb545c3b804cd8ac1f861b18852761a987693650478fb01ae98538df9741.exe
3636	d8cbbb545c3b804cd8ac1f861b18852761a987693650478fb01ae98538df9741.exe
3636	d8cbbb545c3b804cd8ac1f861b18852761a987693650478fb01ae98538df9741.exe
3636	d8cbbb545c3b804cd8ac1f861b18852761a987693650478fb01ae98538df9741.exe
400	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	400	RegAsm.exe
Token: SeBackupPrivilege	400	RegAsm.exe
Token: SeSecurityPrivilege	400	RegAsm.exe
Token: SeSecurityPrivilege	400	RegAsm.exe
Token: SeSecurityPrivilege	400	RegAsm.exe
Token: SeSecurityPrivilege	400	RegAsm.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 3636 wrote to memory of 444	3636	d8cbbb545c3b804cd8ac1f861b18852761a987693650478fb01ae98538df9741.exe	85
PID 3636 wrote to memory of 444	3636	d8cbbb545c3b804cd8ac1f861b18852761a987693650478fb01ae98538df9741.exe	85
PID 3636 wrote to memory of 444	3636	d8cbbb545c3b804cd8ac1f861b18852761a987693650478fb01ae98538df9741.exe	85
PID 444 wrote to memory of 4268	444	AAKEGIJEHJ.exe	87
PID 444 wrote to memory of 4268	444	AAKEGIJEHJ.exe	87
PID 444 wrote to memory of 4268	444	AAKEGIJEHJ.exe	87
PID 444 wrote to memory of 400	444	AAKEGIJEHJ.exe	88
PID 444 wrote to memory of 400	444	AAKEGIJEHJ.exe	88
PID 444 wrote to memory of 400	444	AAKEGIJEHJ.exe	88
PID 444 wrote to memory of 400	444	AAKEGIJEHJ.exe	88
PID 444 wrote to memory of 400	444	AAKEGIJEHJ.exe	88
PID 444 wrote to memory of 400	444	AAKEGIJEHJ.exe	88
PID 444 wrote to memory of 400	444	AAKEGIJEHJ.exe	88
PID 444 wrote to memory of 400	444	AAKEGIJEHJ.exe	88
PID 3636 wrote to memory of 2584	3636	d8cbbb545c3b804cd8ac1f861b18852761a987693650478fb01ae98538df9741.exe	92
PID 3636 wrote to memory of 2584	3636	d8cbbb545c3b804cd8ac1f861b18852761a987693650478fb01ae98538df9741.exe	92
PID 3636 wrote to memory of 2584	3636	d8cbbb545c3b804cd8ac1f861b18852761a987693650478fb01ae98538df9741.exe	92
PID 2584 wrote to memory of 4532	2584	cmd.exe	94
PID 2584 wrote to memory of 4532	2584	cmd.exe	94
PID 2584 wrote to memory of 4532	2584	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\d8cbbb545c3b804cd8ac1f861b18852761a987693650478fb01ae98538df9741.exe
"C:\Users\Admin\AppData\Local\Temp\d8cbbb545c3b804cd8ac1f861b18852761a987693650478fb01ae98538df9741.exe"
1⤵
- Checks computer location settings
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3636
- C:\ProgramData\AAKEGIJEHJ.exe
  "C:\ProgramData\AAKEGIJEHJ.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:444
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
    3⤵
    PID:4268
- - 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:400
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\DGDBFBFCBFBK" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2584
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 10
    3⤵
    - Delays execution with timeout.exe
    PID:4532

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

AAKEGIJEHJ.exe

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

Submit Download

memory/400-64-0x0000000008A50000-0x0000000009068000-memory.dmp

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memory/400-68-0x0000000008690000-0x00000000086DC000-memory.dmp

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memory/400-75-0x0000000072290000-0x0000000072A40000-memory.dmp

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memory/400-58-0x0000000000400000-0x0000000000480000-memory.dmp

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memory/400-59-0x000000007229E000-0x000000007229F000-memory.dmp

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memory/400-60-0x0000000005BA0000-0x0000000006144000-memory.dmp

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memory/400-61-0x0000000005690000-0x0000000005722000-memory.dmp

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memory/400-62-0x0000000072290000-0x0000000072A40000-memory.dmp

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memory/400-73-0x000000000AAF0000-0x000000000B01C000-memory.dmp

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memory/400-72-0x0000000009E20000-0x0000000009FE2000-memory.dmp

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memory/400-67-0x0000000008510000-0x000000000854C000-memory.dmp

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memory/400-66-0x00000000084B0000-0x00000000084C2000-memory.dmp

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memory/400-65-0x0000000008580000-0x000000000868A000-memory.dmp

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memory/400-63-0x0000000005750000-0x000000000575A000-memory.dmp

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memory/400-69-0x0000000008800000-0x0000000008866000-memory.dmp

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memory/400-70-0x0000000009170000-0x00000000091E6000-memory.dmp

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memory/400-71-0x00000000089D0000-0x00000000089EE000-memory.dmp

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memory/444-57-0x00000000012A0000-0x00000000012A1000-memory.dmp

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memory/3636-7-0x000000001E6F0000-0x000000001E94F000-memory.dmp

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memory/3636-0-0x0000000000F70000-0x000000000163F000-memory.dmp

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