fakeav | d66c418354ff17f2a4881407777b84f02bd1f3ddfaf7f4beb3203be97d0bcca5

Analysis

max time kernel
155s
max time network
165s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
27-01-2024 13:33

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General

Target

7a628e99bb4be11e4dc7d90c7e048ed3.exe
Size

755KB
MD5

7a628e99bb4be11e4dc7d90c7e048ed3
SHA1

4a778fe817f7a765edde8f52c54e78c77eb05f3a
SHA256

d66c418354ff17f2a4881407777b84f02bd1f3ddfaf7f4beb3203be97d0bcca5
SHA512

dc2e2131033b062ad3caaea23bfef891728431cd9011cfcc2607c905e58ce02428b5add4781ee3ab52a795d5cf47fac30bc4ef61bf47f54caae80e3002475a2a
SSDEEP

12288:xoxejOONAM7GUC1Jr+4o628gx2Jw+tP3Jzm8JOqGXCJdw/oX+pd167QhEQO:2xY3NtGUmJr+4Obxd+tPZSZD/oE6EhE

Score

10^/10

fakeav fakeav persistence spyware upx

Malware Config

Signatures

FakeAV, RogueAntivirus
FakeAV or Rogue AntiVirus is a class of malware that displays false alert messages.
fakeav spyware fakeav

FakeAV payload 2 IoCs

fakeav spyware

Processes:

resource	yara_rule
behavioral2/memory/772-0-0x0000000000400000-0x00000000004C8000-memory.dmp	fakeav
behavioral2/memory/772-18-0x0000000000400000-0x00000000004C8000-memory.dmp	fakeav

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

Processes:

7a628e99bb4be11e4dc7d90c7e048ed3.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	7a628e99bb4be11e4dc7d90c7e048ed3.exe

Executes dropped EXE 1 IoCs

Processes:

KeyGen.exe

pid process

3208 KeyGen.exe

pid	process
3208	KeyGen.exe

UPX packed file 3 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
C:\Windows\KeyGen.exe	upx
behavioral2/memory/3208-16-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3208-19-0x0000000000400000-0x000000000041F000-memory.dmp	upx

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

7a628e99bb4be11e4dc7d90c7e048ed3.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CSRLT.EXE = "C:\\Windows\\system32\\CSRLT.EXE"	7a628e99bb4be11e4dc7d90c7e048ed3.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\MSBLT.EXE = "C:\\Windows\\MSBLT.EXE"	7a628e99bb4be11e4dc7d90c7e048ed3.exe

Drops file in System32 directory 2 IoCs

Processes:

7a628e99bb4be11e4dc7d90c7e048ed3.exe

description	ioc	process
File created	C:\Windows\SysWOW64\CSRLT.EXE	7a628e99bb4be11e4dc7d90c7e048ed3.exe
File opened for modification	C:\Windows\SysWOW64\CSRLT.EXE	7a628e99bb4be11e4dc7d90c7e048ed3.exe

Drops file in Windows directory 3 IoCs

Processes:

7a628e99bb4be11e4dc7d90c7e048ed3.exe

description	ioc	process
File created	C:\Windows\MSBLT.EXE	7a628e99bb4be11e4dc7d90c7e048ed3.exe
File opened for modification	C:\Windows\MSBLT.EXE	7a628e99bb4be11e4dc7d90c7e048ed3.exe
File created	C:\Windows\KeyGen.exe	7a628e99bb4be11e4dc7d90c7e048ed3.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

KeyGen.exe

pid process

3208 KeyGen.exe
3208 KeyGen.exe

pid	process
3208	KeyGen.exe
3208	KeyGen.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

7a628e99bb4be11e4dc7d90c7e048ed3.exe

description	pid	process	target process
PID 772 wrote to memory of 3208	772	7a628e99bb4be11e4dc7d90c7e048ed3.exe	KeyGen.exe
PID 772 wrote to memory of 3208	772	7a628e99bb4be11e4dc7d90c7e048ed3.exe	KeyGen.exe
PID 772 wrote to memory of 3208	772	7a628e99bb4be11e4dc7d90c7e048ed3.exe	KeyGen.exe

C:\Users\Admin\AppData\Local\Temp\7a628e99bb4be11e4dc7d90c7e048ed3.exe
"C:\Users\Admin\AppData\Local\Temp\7a628e99bb4be11e4dc7d90c7e048ed3.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:772

C:\Windows\KeyGen.exe
"C:\Windows\KeyGen.exe"
2⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
PID:3208

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Windows\KeyGen.exe
Filesize
52KB

MD5
e3c7d489013b51c671aa79c9068a2a00

SHA1
deed13e52afcc9fd2ef326fb6b0aa4bf7fcf14be

SHA256
5ea232ac5ebca4584f8689d5a1ed466404272a5c5496f41934537504368b5da2

SHA512
18a31ffcc796d6352142374dc0e12d83b9b46d56069a5db26a38b0f6a133302f13d7064bfe9bc16e7a705aeeb2cec2d654863d92280a6085c8202a3c8096b240

Download Submit
memory/772-0-0x0000000000400000-0x00000000004C8000-memory.dmp

Filesize
800KB

Download
memory/772-1-0x0000000001F40000-0x0000000001F41000-memory.dmp

Filesize
4KB

Download
memory/772-18-0x0000000000400000-0x00000000004C8000-memory.dmp

Filesize
800KB

Download
memory/3208-16-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3208-19-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download