fakeav | d66c418354ff17f2a4881407777b84f02bd1f3ddfaf7f4beb3203be97d0bcca5

General

Target

d66c418354ff17f2a4881407777b84f02bd1f3ddfaf7f4beb3203be97d0bcca5.exe
Size

755KB
MD5

7a628e99bb4be11e4dc7d90c7e048ed3
SHA1

4a778fe817f7a765edde8f52c54e78c77eb05f3a
SHA256

d66c418354ff17f2a4881407777b84f02bd1f3ddfaf7f4beb3203be97d0bcca5
SHA512

dc2e2131033b062ad3caaea23bfef891728431cd9011cfcc2607c905e58ce02428b5add4781ee3ab52a795d5cf47fac30bc4ef61bf47f54caae80e3002475a2a

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
4248	KeyGen.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0007000000021e23-125.dat	upx
behavioral2/files/0x0007000000021e23-126.dat	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-1-5-21-1082102374-1487407228-1886994731-1000\Control Panel\International\Geo\Nation	d66c418354ff17f2a4881407777b84f02bd1f3ddfaf7f4beb3203be97d0bcca5.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\RunOnce	d66c418354ff17f2a4881407777b84f02bd1f3ddfaf7f4beb3203be97d0bcca5.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\MSBLT.EXE = "C:\\Windows\\MSBLT.EXE"	d66c418354ff17f2a4881407777b84f02bd1f3ddfaf7f4beb3203be97d0bcca5.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	d66c418354ff17f2a4881407777b84f02bd1f3ddfaf7f4beb3203be97d0bcca5.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CSRLT.EXE = "C:\\Windows\\system32\\CSRLT.EXE"	d66c418354ff17f2a4881407777b84f02bd1f3ddfaf7f4beb3203be97d0bcca5.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\CSRLT.EXE	d66c418354ff17f2a4881407777b84f02bd1f3ddfaf7f4beb3203be97d0bcca5.exe
File opened for modification	C:\Windows\SysWOW64\CSRLT.EXE	d66c418354ff17f2a4881407777b84f02bd1f3ddfaf7f4beb3203be97d0bcca5.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\MSBLT.EXE	d66c418354ff17f2a4881407777b84f02bd1f3ddfaf7f4beb3203be97d0bcca5.exe
File created	C:\Windows\KeyGen.exe	d66c418354ff17f2a4881407777b84f02bd1f3ddfaf7f4beb3203be97d0bcca5.exe
File created	C:\Windows\MSBLT.EXE	d66c418354ff17f2a4881407777b84f02bd1f3ddfaf7f4beb3203be97d0bcca5.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
4248	KeyGen.exe
4248	KeyGen.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 620 wrote to memory of 4248	620	d66c418354ff17f2a4881407777b84f02bd1f3ddfaf7f4beb3203be97d0bcca5.exe	82
PID 620 wrote to memory of 4248	620	d66c418354ff17f2a4881407777b84f02bd1f3ddfaf7f4beb3203be97d0bcca5.exe	82
PID 620 wrote to memory of 4248	620	d66c418354ff17f2a4881407777b84f02bd1f3ddfaf7f4beb3203be97d0bcca5.exe	82

C:\Users\Admin\AppData\Local\Temp\d66c418354ff17f2a4881407777b84f02bd1f3ddfaf7f4beb3203be97d0bcca5.exe
"C:\Users\Admin\AppData\Local\Temp\d66c418354ff17f2a4881407777b84f02bd1f3ddfaf7f4beb3203be97d0bcca5.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:620
- C:\Windows\KeyGen.exe
  "C:\Windows\KeyGen.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:4248

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

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

Analysis

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