stealc | 6d97acf787fc0571e81d0c82c301f91005523246319a2b17eb9db765e754ad89

Analysis

max time kernel
142s
max time network
123s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
09/10/2024, 19:18

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General

Target

UniversalRecoilV2.exe
Size

6.7MB
MD5

d8e739ca8627a709dbd025c95eec3c09
SHA1

cb0d1baefa7b97e355e16b1bbfa418334c579e80
SHA256

6d97acf787fc0571e81d0c82c301f91005523246319a2b17eb9db765e754ad89
SHA512

85bbb0e0c2059d9a141edf49102d43aef55ffab458f52f7bb755bd434499629a936fa39c3ec8d60e289232ab4abe2cdf1ffd55b59d914e18d62a2114a5006ebf
SSDEEP

196608:6aLfVOixPlm+6Q9JqjodWfeNSkfoIKtAINPsbET9iorQ:NLXlm+6vjLGybNEbET9Z

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-1-5-21-2703099537-420551529-3771253338-1000\Control Panel\International\Geo\Nation	VC_redistx64.exe

Executes dropped EXE 3 IoCs

pid	Process
2860	gWsmPty.exe
1364	VC_redistx64.exe
2608	UniversalRecoilV2.exe

Loads dropped DLL 3 IoCs

pid	Process
3068	WerFault.exe
3068	WerFault.exe
3068	WerFault.exe

Themida packer 5 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral1/files/0x0036000000019240-20.dat	themida
behavioral1/memory/1364-21-0x0000000000400000-0x0000000000B78000-memory.dmp	themida
behavioral1/memory/1364-24-0x0000000000400000-0x0000000000B78000-memory.dmp	themida
behavioral1/memory/1364-23-0x0000000000400000-0x0000000000B78000-memory.dmp	themida
behavioral1/memory/1364-31-0x0000000000400000-0x0000000000B78000-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-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\My Program = "C:\\ProgramData\\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
1364	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
3068	2860	WerFault.exe	30

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	UniversalRecoilV2.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 2 IoCs

pid	Process
1364	VC_redistx64.exe
2860	gWsmPty.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2608	UniversalRecoilV2.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2188 wrote to memory of 2860	2188	UniversalRecoilV2.exe	30
PID 2188 wrote to memory of 2860	2188	UniversalRecoilV2.exe	30
PID 2188 wrote to memory of 2860	2188	UniversalRecoilV2.exe	30
PID 2188 wrote to memory of 2860	2188	UniversalRecoilV2.exe	30
PID 2188 wrote to memory of 1364	2188	UniversalRecoilV2.exe	31
PID 2188 wrote to memory of 1364	2188	UniversalRecoilV2.exe	31
PID 2188 wrote to memory of 1364	2188	UniversalRecoilV2.exe	31
PID 2188 wrote to memory of 1364	2188	UniversalRecoilV2.exe	31
PID 2188 wrote to memory of 2608	2188	UniversalRecoilV2.exe	32
PID 2188 wrote to memory of 2608	2188	UniversalRecoilV2.exe	32
PID 2188 wrote to memory of 2608	2188	UniversalRecoilV2.exe	32
PID 2188 wrote to memory of 2608	2188	UniversalRecoilV2.exe	32
PID 2860 wrote to memory of 3068	2860	gWsmPty.exe	34
PID 2860 wrote to memory of 3068	2860	gWsmPty.exe	34
PID 2860 wrote to memory of 3068	2860	gWsmPty.exe	34
PID 2860 wrote to memory of 3068	2860	gWsmPty.exe	34

C:\Users\Admin\AppData\Local\Temp\UniversalRecoilV2.exe
"C:\Users\Admin\AppData\Local\Temp\UniversalRecoilV2.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2188
- 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:2860
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2860 -s 884
    3⤵
    - Loads dropped DLL
    - Program crash
    PID:3068
- 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:1364
- C:\Users\Admin\AppData\Roaming\UniversalRecoilV2.exe
  "C:\Users\Admin\AppData\Roaming\UniversalRecoilV2.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:2608

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

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Downloads

C:\Users\Admin\AppData\Roaming\UniversalRecoilV2.exe

Filesize
3.2MB

MD5
acf8907ce64638007fb5514265812c67

SHA1
daa5404df21afc0cbfc126b9544fa68f3833e3f8

SHA256
9fe5fb74600e204a4739a0ed262f16ab6c7eb9f970f61d6315a8e5010f9bc3d4

SHA512
aa7478af047621b9f6d828356a20905f46a520cf364bc639ff0c21b5e9ae8eb29d5edcb2dd00c4dc327ca5348868d754c7068aff132d27d21e606e3ff821f9b6

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/1364-21-0x0000000000400000-0x0000000000B78000-memory.dmp

Filesize
7.5MB

Download
memory/1364-24-0x0000000000400000-0x0000000000B78000-memory.dmp

Filesize
7.5MB

Download
memory/1364-31-0x0000000000400000-0x0000000000B78000-memory.dmp

Filesize
7.5MB

Download
memory/1364-22-0x00000000779E0000-0x00000000779E2000-memory.dmp

Filesize
8KB

Download
memory/1364-23-0x0000000000400000-0x0000000000B78000-memory.dmp

Filesize
7.5MB

Download
memory/2188-0-0x000007FEF6853000-0x000007FEF6854000-memory.dmp

Filesize
4KB

Download
memory/2188-4-0x000000001BAC0000-0x000000001C154000-memory.dmp

Filesize
6.6MB

Download
memory/2188-2-0x0000000000140000-0x0000000000146000-memory.dmp

Filesize
24KB

Download
memory/2188-1-0x0000000001350000-0x0000000001A0A000-memory.dmp

Filesize
6.7MB

Download
memory/2188-3-0x000007FEF6850000-0x000007FEF723C000-memory.dmp

Filesize
9.9MB

Download
memory/2188-28-0x000007FEF6850000-0x000007FEF723C000-memory.dmp

Filesize
9.9MB

Download
memory/2188-5-0x0000000000150000-0x0000000000156000-memory.dmp

Filesize
24KB

Download
memory/2608-30-0x00000000002E0000-0x0000000000632000-memory.dmp

Filesize
3.3MB

Download
memory/2860-15-0x0000000000B00000-0x0000000000D63000-memory.dmp

Filesize
2.4MB

Download
memory/2860-42-0x0000000000B00000-0x0000000000D63000-memory.dmp

Filesize
2.4MB

Download