aee69ef9040e902b7a6639d7594df47e0e73625143a671583db8b85be525a3e5

Resubmissions

02/03/2024, 22:38

240302-2kwptaae3710

02/03/2024, 22:34

240302-2g86qsad9610

Analysis

max time kernel
32s
max time network
39s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
02/03/2024, 22:34

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General

Target
Fake AV/Ana.exe
Size 2.1MB
Sample240302-2g86qsad96
SHA256 117d7af0deb40b3fe532bb6cbe374884fa55ed7cfe053fe698720cdccb5a59cb
MD5 f571faca510bffe809c76c1828d44523
SHA1 7a3ca1660f0a513316b8cd5496ac7dbe82f0e0c2
SHA512 a08bca2fb1387cc70b737520d566c7117aa3fdb9a52f5dbb0bb7be44630da7977882d8c808cbee843c8a180777b4ac5819e8bafda6b2c883e380dc7fb5358a51
SSDEEP 49152:OwVYlfBUDiZx8Fa/Q0NuB3btlnCItWNSwoy:OxPUDQmso0NuBZlnCItM
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

bootkit discovery evasion persistence trojan upx

Malware Config

Signatures

Checks BIOS information in registry 2 TTPs 1 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	DB.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-1-5-21-3045580317-3728985860-206385570-1000\Control Panel\International\Geo\Nation	Ana.exe

Executes dropped EXE 5 IoCs

pid	Process
4380	AV.EXE
4764	AV2.EXE
4940	DB.EXE
1100	EN.EXE
668	SB.EXE

UPX packed file 11 IoCs

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

upx

resource	yara_rule
behavioral4/files/0x000700000002323e-23.dat	upx
behavioral4/memory/4940-31-0x0000000000400000-0x0000000000445000-memory.dmp	upx
behavioral4/files/0x000700000002323f-44.dat	upx
behavioral4/memory/4940-48-0x0000000000590000-0x0000000000623000-memory.dmp	upx
behavioral4/memory/1100-51-0x0000000000400000-0x000000000040A000-memory.dmp	upx
behavioral4/memory/4940-60-0x0000000000590000-0x0000000000623000-memory.dmp	upx
behavioral4/memory/4940-61-0x0000000000590000-0x0000000000623000-memory.dmp	upx
behavioral4/memory/4940-67-0x0000000000590000-0x0000000000623000-memory.dmp	upx
behavioral4/memory/1100-74-0x0000000000400000-0x000000000040A000-memory.dmp	upx
behavioral4/memory/4764-90-0x0000000000400000-0x00000000004C3000-memory.dmp	upx
behavioral4/memory/4940-92-0x0000000000590000-0x0000000000623000-memory.dmp	upx

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	DB.EXE

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\physicaldrive0	SB.EXE

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\authzi.exe	DB.EXE

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

System Information Discovery
T1082

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1553.004

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\30530A0C86EDB1CD5A2A5FE37EF3BF28E69BE16D	AV.EXE
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\30530A0C86EDB1CD5A2A5FE37EF3BF28E69BE16D\Blob = 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	AV.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4940	DB.EXE
4940	DB.EXE
4940	DB.EXE
4940	DB.EXE

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4940	DB.EXE
Token: SeShutdownPrivilege	668	SB.EXE

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4168 wrote to memory of 4380	4168	Ana.exe	89
PID 4168 wrote to memory of 4380	4168	Ana.exe	89
PID 4168 wrote to memory of 4380	4168	Ana.exe	89
PID 4168 wrote to memory of 4764	4168	Ana.exe	90
PID 4168 wrote to memory of 4764	4168	Ana.exe	90
PID 4168 wrote to memory of 4764	4168	Ana.exe	90
PID 4168 wrote to memory of 4940	4168	Ana.exe	91
PID 4168 wrote to memory of 4940	4168	Ana.exe	91
PID 4168 wrote to memory of 4940	4168	Ana.exe	91
PID 4168 wrote to memory of 1100	4168	Ana.exe	92
PID 4168 wrote to memory of 1100	4168	Ana.exe	92
PID 4168 wrote to memory of 1100	4168	Ana.exe	92
PID 4168 wrote to memory of 668	4168	Ana.exe	93
PID 4168 wrote to memory of 668	4168	Ana.exe	93
PID 4168 wrote to memory of 668	4168	Ana.exe	93

C:\Users\Admin\AppData\Local\Temp\Fake AV\Ana.exe
"C:\Users\Admin\AppData\Local\Temp\Fake AV\Ana.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4168
- C:\Users\Admin\AppData\Local\Temp\AV.EXE
  "C:\Users\Admin\AppData\Local\Temp\AV.EXE"
  2⤵
  - Executes dropped EXE
  - Modifies system certificate store
  PID:4380
- C:\Users\Admin\AppData\Local\Temp\AV2.EXE
  "C:\Users\Admin\AppData\Local\Temp\AV2.EXE"
  2⤵
  - Executes dropped EXE
  PID:4764
- C:\Users\Admin\AppData\Local\Temp\DB.EXE
  "C:\Users\Admin\AppData\Local\Temp\DB.EXE"
  2⤵
  - Checks BIOS information in registry
  - Executes dropped EXE
  - Checks whether UAC is enabled
  - Drops file in System32 directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4940
- - C:\Windows\SysWOW64\cmd.exe
    /c C:\Users\Admin\AppData\Local\Temp\~unins9125.bat "C:\Users\Admin\AppData\Local\Temp\DB.EXE"
    3⤵
    PID:4864
- C:\Users\Admin\AppData\Local\Temp\EN.EXE
  "C:\Users\Admin\AppData\Local\Temp\EN.EXE"
  2⤵
  - Executes dropped EXE
  PID:1100
- C:\Users\Admin\AppData\Local\Temp\SB.EXE
  "C:\Users\Admin\AppData\Local\Temp\SB.EXE"
  2⤵
  - Executes dropped EXE
  - Writes to the Master Boot Record (MBR)
  - Suspicious use of AdjustPrivilegeToken
  PID:668

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Pre-OS Boot

T1542

Bootkit

T1542.003

Subvert Trust Controls

T1553

Install Root Certificate

T1553.004

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

AV.EXE

Path C:\Users\Admin\AppData\Local\Temp\AV.EXE
Size 556KB
SHA256 2c54a179e28325875bbb092ea3519868462210cecf22726e460a8c9d2ef1695c
MD5 eb5969d607ba3ad6184210472583cc12
SHA1 05fb52c38d2f5152c90a579f1aab317fcab5c570
SHA512 e6ccd02c2115863d95178e7c65018ab986d616f4cc96a5de143b8274af1dfbc336581836c3d1572edbe2d460c1addb18709466a190c31249b5172cdf60f79110
SSDEEP 12288:8UsJVYumBHnPLP9HT5yT6U0yFpDDiEefqGyV96C0Y/aZCLQC:8tVYuCjfyuyFpDDiZqGyV96mFQC
MD5 SHA1 SHA512 SSDEEP

Submit Download

AV.EXE

Path C:\Users\Admin\AppData\Local\Temp\AV.EXE
Size 1.1MB
SHA256 26c8f13ea8dc17443a9fa005610537cb6700aebaf748e747e9278d504e416eb1
MD5 f284568010505119f479617a2e7dc189
SHA1 e23707625cce0035e3c1d2255af1ed326583a1ea
SHA512 ebe96e667dfde547c5a450b97cd7534b977f4073c7f4cbc123a0e00baaefeb3be725c1cafbfb5bb040b3359267954cd1b4e2094ef71fc273732016ee822064bf
SSDEEP 24576:8tVYuCjfyuyFpDDiZqGyV96mFQRRmO/S6Q0Q+UZvB:MVYlfBUDiZx8Fa/Q0NuB
MD5 SHA1 SHA512 SSDEEP

Submit Download

AV2.EXE

Path C:\Users\Admin\AppData\Local\Temp\AV2.EXE
Size 368KB
SHA256 4ce5e8b510895abb204f97e883d8cbaacc29ccef0844d9ae81f8666f234b0529
MD5 014578edb7da99e5ba8dd84f5d26dfd5
SHA1 df56d701165a480e925a153856cbc3ab799c5a04
SHA512 bd5159af96d83fc7528956c5b1bd6f93847db18faa0680c6041f87bbebef5e3ba2de1f185d77ff28b8d7d78ec4f7bd54f48b37a16da39f43314ef022b4a36068
SSDEEP 6144:4VBLdqUNRxOw+2PIi0EhvD8kCDR6Iqacvct1qTbm262l:4V9dsUZlD8kCAIqLpu2l
MD5 SHA1 SHA512 SSDEEP

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DB.EXE

Path C:\Users\Admin\AppData\Local\Temp\DB.EXE
Size 243KB
SHA256 b5a255d0454853c8afc0b321e1d86dca22c3dbefb88e5d385d2d72f9bc0109e6
MD5 c6746a62feafcb4fca301f606f7101fa
SHA1 e09cd1382f9ceec027083b40e35f5f3d184e485f
SHA512 ee5dfa08c86bf1524666f0851c729970dbf0b397db9595a2bae01516299344edb68123e976592a83e492f2982fafe8d350ba2d41368eb4ecf4e6fe12af8f5642
SSDEEP 6144:nDeWbibn2UdAirjqCVaO2thIt5n2V5eKnRkLfX:m6UdzrjJ0O2thIt5ESLv
MD5 SHA1 SHA512 SSDEEP

Submit Download

EN.EXE

Path C:\Users\Admin\AppData\Local\Temp\EN.EXE
Size 6KB
SHA256 c17a18cf2c243303b8a6688aad83b3e6e9b727fcd89f69065785ef7f1a2a3e38
MD5 621f2279f69686e8547e476b642b6c46
SHA1 66f486cd566f86ab16015fe74f50d4515decce88
SHA512 068402b02f1056b722f21b0a354b038f094d02e4a066b332553cd6b36e3640e8f35aa0499a2b057c566718c3593d3cea6bbabd961e04f0a001fd45d8be8e1c4e
SSDEEP 96:VhND4gTyLzKVnL/w6D9+xpJw59WagKMpa2drl5LiUfyFI:VhZ+LzKVLLcpS57Qpa2drlRiUam
MD5 SHA1 SHA512 SSDEEP

Submit Download

tsa.crt

Path C:\Users\Admin\AppData\Local\Temp\Fake AV\tsa.crt
Size 1010B
SHA256 2563fe2f793f119a1bae5cca6eab9d8c20409aa1f1e0db341c623e1251244ef5
MD5 6e630504be525e953debd0ce831b9aa0
SHA1 edfa47b3edf98af94954b5b0850286a324608503
SHA512 bbcf285309a4d5605e19513c77ef077a4c451cbef04e3cbdfec6d15cc157a9800a7ff6f70964b0452ddb939ff50766e887904eda06a9999fdedf5b2e8776ebd2
MD5 SHA1 SHA512

Submit Download

GB.EXE

Path C:\Users\Admin\AppData\Local\Temp\GB.EXE
Size 149KB
SHA256 e7953daad7a68f8634ded31a21a31f0c2aa394ca9232e2f980321f7b69176496
MD5 fe731b4c6684d643eb5b55613ef9ed31
SHA1 cfafe2a14f5413278304920154eb467f7c103c80
SHA512 f7756d69138df6d3b0ffa47bdf274e5fd8aab4fff9d68abe403728c8497ac58e0f3d28d41710de715f57b7a2b5daa2dd7e04450f19c6d013a08f543bd6fc9c2e
SSDEEP 3072:gvuuiI+9QMAubd8diPnXr2UsCdNq3orZeBXh+9SbmmzpWEJAt:/If5uKw/PNccZeBXhqiZ9g
MD5 SHA1 SHA512 SSDEEP

Submit Download

SB.EXE

Path C:\Users\Admin\AppData\Local\Temp\SB.EXE
Size 224KB
SHA256 ce822ff86e584f15b6abd14c61453bd3b481d4ec3fdeb961787fceb52acd8bd6
MD5 9252e1be9776af202d6ad5c093637022
SHA1 6cc686d837cd633d9c2e8bc1eaba5fc364bf71d8
SHA512 98b1b3ce4d16d36f738478c6cf41e8f4a57d3a5ecfa8999d45592f79a469d8af8554bf4d5db34cb79cec71ce103f4fde1b41bd3cce30714f803e432e53da71ea
SSDEEP 6144:OwJUfszeSamNL/At5o6Z0Bd3lqNcv4gNXxbt/RpZXg/:inmNL/sf+lmWxbt/RpZg
MD5 SHA1 SHA512 SSDEEP

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memory/668-64-0x0000000000400000-0x0000000000464000-memory.dmp

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memory/668-68-0x0000000000830000-0x0000000000894000-memory.dmp

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memory/668-69-0x000000000083B000-0x000000000083C000-memory.dmp

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memory/668-70-0x0000000000400000-0x0000000000464000-memory.dmp

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memory/1100-51-0x0000000000400000-0x000000000040A000-memory.dmp

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memory/1100-74-0x0000000000400000-0x000000000040A000-memory.dmp

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memory/4380-71-0x0000000000890000-0x00000000008A0000-memory.dmp

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memory/4380-59-0x0000000073BA0000-0x0000000074151000-memory.dmp

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memory/4380-62-0x0000000073BA0000-0x0000000074151000-memory.dmp

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memory/4764-91-0x0000000000650000-0x0000000000651000-memory.dmp

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memory/4764-90-0x0000000000400000-0x00000000004C3000-memory.dmp

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memory/4764-86-0x0000000000560000-0x0000000000563000-memory.dmp

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memory/4940-67-0x0000000000590000-0x0000000000623000-memory.dmp

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memory/4940-72-0x00000000008A0000-0x00000000008A1000-memory.dmp

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memory/4940-48-0x0000000000590000-0x0000000000623000-memory.dmp

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memory/4940-31-0x0000000000400000-0x0000000000445000-memory.dmp

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memory/4940-45-0x00000000001C0000-0x00000000001F1000-memory.dmp

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memory/4940-61-0x0000000000590000-0x0000000000623000-memory.dmp

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memory/4940-60-0x0000000000590000-0x0000000000623000-memory.dmp

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memory/4940-92-0x0000000000590000-0x0000000000623000-memory.dmp

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