stealc | 0a44244f435457680e7026b969db56ea09a8748e6dbfe0b51bc184045798810f

Analysis

max time kernel
141s
max time network
122s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
10-10-2024 00:58

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

MW3_Unlocker.exe
Size

4.9MB
MD5

d6490e5a89108caecb7717db256e9b78
SHA1

7e734eb9626ae2cf21383fb718e54006f34e5a10
SHA256

0a44244f435457680e7026b969db56ea09a8748e6dbfe0b51bc184045798810f
SHA512

c050c69e2a4f40d97ff732c43ef960ce687c8289acdba4eb676c499d95e2f207376e54413d74af39e4b9d615cf89ff7703f33580f553a06e04ad419408e2e0ef
SSDEEP

98304:FkB3z2lHQTUC9IyzD09xXSp+8RikRGAGO9dku6Rp1JEy:DJEUC9Iy/EdSseiTA79dL8E

Score

10^/10

stealc game discovery evasion persistence stealer themida trojan

Malware Config

Extracted

Family

stealc

Botnet

game

http://193.233.112.44

Attributes

url_path
/383ccd496f3c5eee.php

Signatures

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

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

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	VC_redistx64.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	VC_redistx64.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	VC_redistx64.exe

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-1-5-21-3063565911-2056067323-3330884624-1000\Control Panel\International\Geo\Nation	VC_redistx64.exe

Executes dropped EXE 3 IoCs

pid	Process
2940	gWsmPty.exe
3060	VC_redistx64.exe
2432	MW3_Unlocker.exe

Loads dropped DLL 3 IoCs

pid	Process
2500	WerFault.exe
2500	WerFault.exe
2500	WerFault.exe

Themida packer 5 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral1/files/0x0008000000014c66-20.dat	themida
behavioral1/memory/3060-21-0x0000000000400000-0x0000000000B78000-memory.dmp	themida
behavioral1/memory/3060-28-0x0000000000400000-0x0000000000B78000-memory.dmp	themida
behavioral1/memory/3060-26-0x0000000000400000-0x0000000000B78000-memory.dmp	themida
behavioral1/memory/3060-32-0x0000000000400000-0x0000000000B78000-memory.dmp	themida

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Windows\CurrentVersion\Run\My Program = "C:\\Users\\Admin\\AppData\\Roaming\\MyHiddenFolder\\VC_redistx64.exe"	VC_redistx64.exe

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

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	VC_redistx64.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
3060	VC_redistx64.exe

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
2500	2940	WerFault.exe	28

System Location Discovery: System Language Discovery 1 TTPs 3 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	VC_redistx64.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MW3_Unlocker.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	gWsmPty.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	gWsmPty.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	gWsmPty.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
3060	VC_redistx64.exe
2432	MW3_Unlocker.exe
2432	MW3_Unlocker.exe
2940	gWsmPty.exe
2432	MW3_Unlocker.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2432	MW3_Unlocker.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2400 wrote to memory of 2940	2400	MW3_Unlocker.exe	28
PID 2400 wrote to memory of 2940	2400	MW3_Unlocker.exe	28
PID 2400 wrote to memory of 2940	2400	MW3_Unlocker.exe	28
PID 2400 wrote to memory of 2940	2400	MW3_Unlocker.exe	28
PID 2400 wrote to memory of 3060	2400	MW3_Unlocker.exe	29
PID 2400 wrote to memory of 3060	2400	MW3_Unlocker.exe	29
PID 2400 wrote to memory of 3060	2400	MW3_Unlocker.exe	29
PID 2400 wrote to memory of 3060	2400	MW3_Unlocker.exe	29
PID 2400 wrote to memory of 2432	2400	MW3_Unlocker.exe	30
PID 2400 wrote to memory of 2432	2400	MW3_Unlocker.exe	30
PID 2400 wrote to memory of 2432	2400	MW3_Unlocker.exe	30
PID 2400 wrote to memory of 2432	2400	MW3_Unlocker.exe	30
PID 2940 wrote to memory of 2500	2940	gWsmPty.exe	34
PID 2940 wrote to memory of 2500	2940	gWsmPty.exe	34
PID 2940 wrote to memory of 2500	2940	gWsmPty.exe	34
PID 2940 wrote to memory of 2500	2940	gWsmPty.exe	34

C:\Users\Admin\AppData\Local\Temp\MW3_Unlocker.exe
"C:\Users\Admin\AppData\Local\Temp\MW3_Unlocker.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2400
- C:\Users\Admin\AppData\Roaming\gWsmPty.exe
  "C:\Users\Admin\AppData\Roaming\gWsmPty.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2940
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2940 -s 892
    3⤵
    - Loads dropped DLL
    - Program crash
    PID:2500
- C:\Users\Admin\AppData\Roaming\VC_redistx64.exe
  "C:\Users\Admin\AppData\Roaming\VC_redistx64.exe"
  2⤵
  - Identifies VirtualBox via ACPI registry values (likely anti-VM)
  - Checks BIOS information in registry
  - Checks computer location settings
  - Executes dropped EXE
  - Adds Run key to start application
  - Checks whether UAC is enabled
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:3060
- C:\Users\Admin\AppData\Roaming\MW3_Unlocker.exe
  "C:\Users\Admin\AppData\Roaming\MW3_Unlocker.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2432

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\MW3_Unlocker.exe

Filesize
1.5MB

MD5
d5020cbdffd3291c60f57738c4ef209f

SHA1
7b6d3237a671f63e4b2355de88f9e713b5789d5d

SHA256
35050d783ce83a7ddcb17cdb19ffb9fed0712adeee748a0c1225be630d7deba3

SHA512
ece513607a7f0439888e82955a2ef8d784abdb33a5b75295b8f857d5ea4b00b4ff67ae4ccab7d457c1c2d6e8475884172bbc7f0080e555f41d1acddd15abbe54

Download Submit
C:\Users\Admin\AppData\Roaming\VC_redistx64.exe

Filesize
2.9MB

MD5
507acc8f3249adef7468989fee931211

SHA1
4d66286973a21e76b0e2c746bac00fa28d446ca9

SHA256
6abb77dce6d4af42005e673cb089b6d41e0ef0b88a6411f4d5dfd8e8b4858154

SHA512
2faee963523b401bf1e588c86bfeef899067456f22848d299525acde5d2ce28a66f769d741deea2e6b218b4e1b0c0f7f4cc08cfc1c2fd8eac5375b3c183b7ee3

Download Submit
C:\Users\Admin\AppData\Roaming\gWsmPty.exe

Filesize
322KB

MD5
c57f035e099bfe7f8d56917a22266dc9

SHA1
88a4ab3cef2b3d293b6d94b8d5b38298d1ec6d87

SHA256
d075bbba29912ff7a321ee5dcb32159b9de8e27e716a1aad9ed52bb9d9ccc4a3

SHA512
836f345be084eeaef97144faa845a697f3c40a5f643088ee355d71cbedac23506c4d53267220bfa467872e850faebbc5a3919fbeb5628534619d39fbcbf1e1e4

Download Submit
memory/2400-4-0x000000001B960000-0x000000001BE22000-memory.dmp

Filesize
4.8MB

Download
memory/2400-29-0x000007FEF5FB0000-0x000007FEF699C000-memory.dmp

Filesize
9.9MB

Download
memory/2400-5-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2400-3-0x000007FEF5FB0000-0x000007FEF699C000-memory.dmp

Filesize
9.9MB

Download
memory/2400-2-0x00000000001C0000-0x00000000001C6000-memory.dmp

Filesize
24KB

Download
memory/2400-0-0x000007FEF5FB3000-0x000007FEF5FB4000-memory.dmp

Filesize
4KB

Download
memory/2400-1-0x0000000000950000-0x0000000000E2E000-memory.dmp

Filesize
4.9MB

Download
memory/2432-31-0x0000000000DA0000-0x0000000000F1C000-memory.dmp

Filesize
1.5MB

Download
memory/2940-15-0x0000000000ED0000-0x0000000001133000-memory.dmp

Filesize
2.4MB

Download
memory/2940-40-0x0000000000ED0000-0x0000000001133000-memory.dmp

Filesize
2.4MB

Download
memory/3060-21-0x0000000000400000-0x0000000000B78000-memory.dmp

Filesize
7.5MB

Download
memory/3060-26-0x0000000000400000-0x0000000000B78000-memory.dmp

Filesize
7.5MB

Download
memory/3060-28-0x0000000000400000-0x0000000000B78000-memory.dmp

Filesize
7.5MB

Download
memory/3060-32-0x0000000000400000-0x0000000000B78000-memory.dmp

Filesize
7.5MB

Download
memory/3060-22-0x0000000077E10000-0x0000000077E12000-memory.dmp

Filesize
8KB

Download