stealc | fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d

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

C2

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
behavioral2/memory/4088-9-0x0000000000D00000-0x0000000001324000-memory.dmp	themida
behavioral2/memory/4088-53-0x0000000000D00000-0x0000000001324000-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
4088	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4088 set thread context of 784	4088	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe	87

System Location Discovery: System Language Discovery 1 TTPs 1 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

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4088	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe
4088	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe
4088	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe
4088	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4088	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 4088 wrote to memory of 1652	4088	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe	86
PID 4088 wrote to memory of 1652	4088	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe	86
PID 4088 wrote to memory of 1652	4088	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe	86
PID 4088 wrote to memory of 784	4088	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe	87
PID 4088 wrote to memory of 784	4088	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe	87
PID 4088 wrote to memory of 784	4088	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe	87
PID 4088 wrote to memory of 784	4088	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe	87
PID 4088 wrote to memory of 784	4088	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe	87
PID 4088 wrote to memory of 784	4088	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe	87
PID 4088 wrote to memory of 784	4088	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe	87
PID 4088 wrote to memory of 784	4088	fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d.exe	87

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:4088
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe"
  2⤵
  PID:1652
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe"
  2⤵
  PID:784

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

1

T1497

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Virtualization/Sandbox Evasion

1

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/784-45-0x0000000000400000-0x000000000062D000-memory.dmp

Filesize
2.2MB

Download
memory/784-49-0x00000000755B0000-0x00000000756A0000-memory.dmp

Filesize
960KB

Download
memory/784-48-0x00000000755B0000-0x00000000756A0000-memory.dmp

Filesize
960KB

Download
memory/784-47-0x0000000000400000-0x000000000062D000-memory.dmp

Filesize
2.2MB

Download
memory/4088-21-0x0000000005790000-0x00000000057A5000-memory.dmp

Filesize
84KB

Download
memory/4088-42-0x0000000005790000-0x00000000057A5000-memory.dmp

Filesize
84KB

Download
memory/4088-6-0x00000000755B0000-0x00000000756A0000-memory.dmp

Filesize
960KB

Download
memory/4088-9-0x0000000000D00000-0x0000000001324000-memory.dmp

Filesize
6.1MB

Download
memory/4088-10-0x00000000058A0000-0x000000000593C000-memory.dmp

Filesize
624KB

Download
memory/4088-11-0x0000000000D00000-0x0000000001324000-memory.dmp

Filesize
6.1MB

Download
memory/4088-12-0x00000000755D0000-0x00000000755D1000-memory.dmp

Filesize
4KB

Download
memory/4088-13-0x00000000755B0000-0x00000000756A0000-memory.dmp

Filesize
960KB

Download
memory/4088-14-0x00000000755B0000-0x00000000756A0000-memory.dmp

Filesize
960KB

Download
memory/4088-15-0x00000000755B0000-0x00000000756A0000-memory.dmp

Filesize
960KB

Download
memory/4088-16-0x00000000755B0000-0x00000000756A0000-memory.dmp

Filesize
960KB

Download
memory/4088-17-0x00000000755B0000-0x00000000756A0000-memory.dmp

Filesize
960KB

Download
memory/4088-19-0x00000000755B0000-0x00000000756A0000-memory.dmp

Filesize
960KB

Download
memory/4088-20-0x0000000005790000-0x00000000057AC000-memory.dmp

Filesize
112KB

Download
memory/4088-0-0x0000000000D00000-0x0000000001324000-memory.dmp

Filesize
6.1MB

Download
memory/4088-28-0x0000000005790000-0x00000000057A5000-memory.dmp

Filesize
84KB

Download
memory/4088-44-0x0000000005790000-0x00000000057A5000-memory.dmp

Filesize
84KB

Download
memory/4088-4-0x00000000755B0000-0x00000000756A0000-memory.dmp

Filesize
960KB

Download
memory/4088-5-0x00000000755B0000-0x00000000756A0000-memory.dmp

Filesize
960KB

Download
memory/4088-3-0x00000000755B0000-0x00000000756A0000-memory.dmp

Filesize
960KB

Download
memory/4088-2-0x00000000755B0000-0x00000000756A0000-memory.dmp

Filesize
960KB

Download
memory/4088-40-0x0000000005790000-0x00000000057A5000-memory.dmp

Filesize
84KB

Download
memory/4088-38-0x0000000005790000-0x00000000057A5000-memory.dmp

Filesize
84KB

Download
memory/4088-36-0x0000000005790000-0x00000000057A5000-memory.dmp

Filesize
84KB

Download
memory/4088-34-0x0000000005790000-0x00000000057A5000-memory.dmp

Filesize
84KB

Download
memory/4088-32-0x0000000005790000-0x00000000057A5000-memory.dmp

Filesize
84KB

Download
memory/4088-30-0x0000000005790000-0x00000000057A5000-memory.dmp

Filesize
84KB

Download
memory/4088-26-0x0000000005790000-0x00000000057A5000-memory.dmp

Filesize
84KB

Download
memory/4088-24-0x0000000005790000-0x00000000057A5000-memory.dmp

Filesize
84KB

Download
memory/4088-22-0x0000000005790000-0x00000000057A5000-memory.dmp

Filesize
84KB

Download
memory/4088-1-0x00000000755D0000-0x00000000755D1000-memory.dmp

Filesize
4KB

Download
memory/4088-53-0x0000000000D00000-0x0000000001324000-memory.dmp

Filesize
6.1MB

Download
memory/4088-54-0x00000000755B0000-0x00000000756A0000-memory.dmp

Filesize
960KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads