fakeav | c6de3fa79c0bb19470aad864385cfebb068b4cacff7752dca4bc71f149a5d23c

Analysis

max time kernel
135s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
29-01-2023 07:19

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General

Target

c6de3fa79c0bb19470aad864385cfebb068b4cacff7752dca4bc71f149a5d23c.exe
Size

755KB
MD5

3a9c0e632afdc428cd5d5eb3a2efdaa8
SHA1

5533de62daf3708adea2da7feafc507053c86c35
SHA256

c6de3fa79c0bb19470aad864385cfebb068b4cacff7752dca4bc71f149a5d23c
SHA512

4fa290a4124ab1ae3c53fa008a30c0dad87c50a24174ccd2dc03307a6af4dea613a45e8ca84e7be919db51af82fc23ea9868534ce47ef20b807dee429e8a97d8
SSDEEP

12288:xoxejOONAM7GUC1Jr+4o628gx2Jw+tP3Jzm8JO3GXCJdw/oX+pd167QhEQO:2xY3NtGUmJr+4Obxd+tPZSZW/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

Executes dropped EXE 1 IoCs

pid	Process
4604	KeyGen.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0008000000023199-133.dat	upx
behavioral2/files/0x0008000000023199-134.dat	upx
behavioral2/memory/4604-135-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4604-136-0x0000000000400000-0x000000000041F000-memory.dmp	upx

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-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation	c6de3fa79c0bb19470aad864385cfebb068b4cacff7752dca4bc71f149a5d23c.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	c6de3fa79c0bb19470aad864385cfebb068b4cacff7752dca4bc71f149a5d23c.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CSRLT.EXE = "C:\\Windows\\system32\\CSRLT.EXE"	c6de3fa79c0bb19470aad864385cfebb068b4cacff7752dca4bc71f149a5d23c.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce	c6de3fa79c0bb19470aad864385cfebb068b4cacff7752dca4bc71f149a5d23c.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\MSBLT.EXE = "C:\\Windows\\MSBLT.EXE"	c6de3fa79c0bb19470aad864385cfebb068b4cacff7752dca4bc71f149a5d23c.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\CSRLT.EXE	c6de3fa79c0bb19470aad864385cfebb068b4cacff7752dca4bc71f149a5d23c.exe
File opened for modification	C:\Windows\SysWOW64\CSRLT.EXE	c6de3fa79c0bb19470aad864385cfebb068b4cacff7752dca4bc71f149a5d23c.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\MSBLT.EXE	c6de3fa79c0bb19470aad864385cfebb068b4cacff7752dca4bc71f149a5d23c.exe
File opened for modification	C:\Windows\MSBLT.EXE	c6de3fa79c0bb19470aad864385cfebb068b4cacff7752dca4bc71f149a5d23c.exe
File created	C:\Windows\KeyGen.exe	c6de3fa79c0bb19470aad864385cfebb068b4cacff7752dca4bc71f149a5d23c.exe

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

System Information Discovery
T1082

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4604	KeyGen.exe
4604	KeyGen.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4824 wrote to memory of 4604	4824	c6de3fa79c0bb19470aad864385cfebb068b4cacff7752dca4bc71f149a5d23c.exe	80
PID 4824 wrote to memory of 4604	4824	c6de3fa79c0bb19470aad864385cfebb068b4cacff7752dca4bc71f149a5d23c.exe	80
PID 4824 wrote to memory of 4604	4824	c6de3fa79c0bb19470aad864385cfebb068b4cacff7752dca4bc71f149a5d23c.exe	80

C:\Users\Admin\AppData\Local\Temp\c6de3fa79c0bb19470aad864385cfebb068b4cacff7752dca4bc71f149a5d23c.exe
"C:\Users\Admin\AppData\Local\Temp\c6de3fa79c0bb19470aad864385cfebb068b4cacff7752dca4bc71f149a5d23c.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:4824
- C:\Windows\KeyGen.exe
  "C:\Windows\KeyGen.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:4604

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\KeyGen.exe

Filesize
52KB

MD5
e3c7d489013b51c671aa79c9068a2a00

SHA1
deed13e52afcc9fd2ef326fb6b0aa4bf7fcf14be

SHA256
5ea232ac5ebca4584f8689d5a1ed466404272a5c5496f41934537504368b5da2

SHA512
18a31ffcc796d6352142374dc0e12d83b9b46d56069a5db26a38b0f6a133302f13d7064bfe9bc16e7a705aeeb2cec2d654863d92280a6085c8202a3c8096b240

Download Submit
C:\Windows\KeyGen.exe

Filesize
52KB

MD5
e3c7d489013b51c671aa79c9068a2a00

SHA1
deed13e52afcc9fd2ef326fb6b0aa4bf7fcf14be

SHA256
5ea232ac5ebca4584f8689d5a1ed466404272a5c5496f41934537504368b5da2

SHA512
18a31ffcc796d6352142374dc0e12d83b9b46d56069a5db26a38b0f6a133302f13d7064bfe9bc16e7a705aeeb2cec2d654863d92280a6085c8202a3c8096b240

Download Submit
memory/4604-135-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4604-136-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download