stealc | fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d

Analysis

max time kernel
118s
max time network
118s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
24/01/2025, 06:00

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General

Target

fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe
Size

2.5MB
MD5

23b163180bc13aa5f430c2cf0413da12
SHA1

c03af31d714b26d2bf254dd986208f20b37885dd
SHA256

fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d
SHA512

598fdd55f492a164c7b669e777d73a0e17b5db0e34d484cae591743699d524b794a6794db9cc0616ccc2412cc9557fa12d8c3780dbf62b8635db76698bbbd77b
SSDEEP

49152:1XaijDDioKqQCOlNBSVPtiCdCLBHkJ2MHjFVWquPgmNW5klRBIdltPAFEP:nDHKRstiCdGHHIjFVWhjNW5uQo6P

Score

10^/10

stealc defense_evasion discovery stealer themida trojan

Malware Config

Extracted

Family

stealc

http://stair585.com

rc4.plain

Signatures

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Stealc family
stealc

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs

defense_evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS 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\SystemBiosVersion	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe

Themida packer 2 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral1/memory/1964-24-0x0000000000800000-0x0000000000E24000-memory.dmp	themida
behavioral1/memory/1964-64-0x0000000000800000-0x0000000000E24000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 1 IoCs

defense_evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
1964	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1964 set thread context of 2736	1964	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe	31

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2972	2736	WerFault.exe	31

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AppLaunch.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1964	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1964	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1964 wrote to memory of 2736	1964	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe	31
PID 1964 wrote to memory of 2736	1964	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe	31
PID 1964 wrote to memory of 2736	1964	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe	31
PID 1964 wrote to memory of 2736	1964	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe	31
PID 1964 wrote to memory of 2736	1964	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe	31
PID 1964 wrote to memory of 2736	1964	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe	31
PID 1964 wrote to memory of 2736	1964	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe	31
PID 1964 wrote to memory of 2736	1964	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe	31
PID 1964 wrote to memory of 2736	1964	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe	31
PID 1964 wrote to memory of 2736	1964	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe	31
PID 1964 wrote to memory of 2736	1964	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe	31
PID 1964 wrote to memory of 2736	1964	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe	31
PID 2736 wrote to memory of 2972	2736	AppLaunch.exe	32
PID 2736 wrote to memory of 2972	2736	AppLaunch.exe	32
PID 2736 wrote to memory of 2972	2736	AppLaunch.exe	32
PID 2736 wrote to memory of 2972	2736	AppLaunch.exe	32
PID 2736 wrote to memory of 2972	2736	AppLaunch.exe	32
PID 2736 wrote to memory of 2972	2736	AppLaunch.exe	32
PID 2736 wrote to memory of 2972	2736	AppLaunch.exe	32

C:\Users\Admin\AppData\Local\Temp\fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe
"C:\Users\Admin\AppData\Local\Temp\fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1964
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2736
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2736 -s 196
    3⤵
    - Program crash
    PID:2972

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1964-25-0x00000000760F1000-0x00000000760F2000-memory.dmp

Filesize
4KB

Download
memory/1964-8-0x00000000760E0000-0x00000000761F0000-memory.dmp

Filesize
1.1MB

Download
memory/1964-2-0x00000000760E0000-0x00000000761F0000-memory.dmp

Filesize
1.1MB

Download
memory/1964-17-0x00000000760E0000-0x00000000761F0000-memory.dmp

Filesize
1.1MB

Download
memory/1964-16-0x00000000760E0000-0x00000000761F0000-memory.dmp

Filesize
1.1MB

Download
memory/1964-15-0x00000000760E0000-0x00000000761F0000-memory.dmp

Filesize
1.1MB

Download
memory/1964-14-0x00000000760E0000-0x00000000761F0000-memory.dmp

Filesize
1.1MB

Download
memory/1964-13-0x00000000760E0000-0x00000000761F0000-memory.dmp

Filesize
1.1MB

Download
memory/1964-12-0x00000000760E0000-0x00000000761F0000-memory.dmp

Filesize
1.1MB

Download
memory/1964-11-0x00000000760E0000-0x00000000761F0000-memory.dmp

Filesize
1.1MB

Download
memory/1964-10-0x00000000760E0000-0x00000000761F0000-memory.dmp

Filesize
1.1MB

Download
memory/1964-9-0x00000000760E0000-0x00000000761F0000-memory.dmp

Filesize
1.1MB

Download
memory/1964-26-0x00000000760E0000-0x00000000761F0000-memory.dmp

Filesize
1.1MB

Download
memory/1964-7-0x00000000760E0000-0x00000000761F0000-memory.dmp

Filesize
1.1MB

Download
memory/1964-6-0x00000000760E0000-0x00000000761F0000-memory.dmp

Filesize
1.1MB

Download
memory/1964-5-0x00000000760E0000-0x00000000761F0000-memory.dmp

Filesize
1.1MB

Download
memory/1964-4-0x00000000760E0000-0x00000000761F0000-memory.dmp

Filesize
1.1MB

Download
memory/1964-3-0x00000000760E0000-0x00000000761F0000-memory.dmp

Filesize
1.1MB

Download
memory/1964-22-0x00000000760E0000-0x00000000761F0000-memory.dmp

Filesize
1.1MB

Download
memory/1964-23-0x00000000760E0000-0x00000000761F0000-memory.dmp

Filesize
1.1MB

Download
memory/1964-21-0x00000000760E0000-0x00000000761F0000-memory.dmp

Filesize
1.1MB

Download
memory/1964-24-0x0000000000800000-0x0000000000E24000-memory.dmp

Filesize
6.1MB

Download
memory/1964-1-0x00000000760F1000-0x00000000760F2000-memory.dmp

Filesize
4KB

Download
memory/1964-0-0x0000000000800000-0x0000000000E24000-memory.dmp

Filesize
6.1MB

Download
memory/1964-40-0x0000000000540000-0x0000000000555000-memory.dmp

Filesize
84KB

Download
memory/1964-38-0x0000000000540000-0x0000000000555000-memory.dmp

Filesize
84KB

Download
memory/1964-42-0x0000000000540000-0x0000000000555000-memory.dmp

Filesize
84KB

Download
memory/1964-52-0x0000000000540000-0x0000000000555000-memory.dmp

Filesize
84KB

Download
memory/1964-50-0x0000000000540000-0x0000000000555000-memory.dmp

Filesize
84KB

Download
memory/1964-46-0x0000000000540000-0x0000000000555000-memory.dmp

Filesize
84KB

Download
memory/1964-44-0x0000000000540000-0x0000000000555000-memory.dmp

Filesize
84KB

Download
memory/1964-28-0x0000000000540000-0x000000000055C000-memory.dmp

Filesize
112KB

Download
memory/1964-36-0x0000000000540000-0x0000000000555000-memory.dmp

Filesize
84KB

Download
memory/1964-34-0x0000000000540000-0x0000000000555000-memory.dmp

Filesize
84KB

Download
memory/1964-32-0x0000000000540000-0x0000000000555000-memory.dmp

Filesize
84KB

Download
memory/1964-30-0x0000000000540000-0x0000000000555000-memory.dmp

Filesize
84KB

Download
memory/1964-49-0x0000000000540000-0x0000000000555000-memory.dmp

Filesize
84KB

Download
memory/1964-29-0x0000000000540000-0x0000000000555000-memory.dmp

Filesize
84KB

Download
memory/1964-64-0x0000000000800000-0x0000000000E24000-memory.dmp

Filesize
6.1MB

Download
memory/1964-63-0x00000000760E0000-0x00000000761F0000-memory.dmp

Filesize
1.1MB

Download
memory/2736-61-0x0000000000400000-0x000000000062D000-memory.dmp

Filesize
2.2MB

Download
memory/2736-58-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/2736-55-0x0000000000400000-0x000000000062D000-memory.dmp

Filesize
2.2MB

Download
memory/2736-54-0x0000000000400000-0x000000000062D000-memory.dmp

Filesize
2.2MB

Download
memory/2736-57-0x0000000000400000-0x000000000062D000-memory.dmp

Filesize
2.2MB

Download
memory/2736-59-0x0000000000400000-0x000000000062D000-memory.dmp

Filesize
2.2MB

Download
memory/2736-53-0x0000000000400000-0x000000000062D000-memory.dmp

Filesize
2.2MB

Download