2a45e44be359fba4c85591e7b13d1ec772ed181adc41254d8b00d31b2d15878e

Resubmissions

08-05-2024 16:15

240508-tqnx6ach3w 10

08-05-2024 16:07

01-05-2024 18:02

27-04-2024 08:46

25-04-2024 21:25

25-04-2024 21:16

25-04-2024 18:27

25-04-2024 18:17

Analysis

max time kernel
37s
max time network
42s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
25-04-2024 18:01

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General

Target

Ana.exe
Size

2.1MB
MD5

f571faca510bffe809c76c1828d44523
SHA1

7a3ca1660f0a513316b8cd5496ac7dbe82f0e0c2
SHA256

117d7af0deb40b3fe532bb6cbe374884fa55ed7cfe053fe698720cdccb5a59cb
SHA512

a08bca2fb1387cc70b737520d566c7117aa3fdb9a52f5dbb0bb7be44630da7977882d8c808cbee843c8a180777b4ac5819e8bafda6b2c883e380dc7fb5358a51
SSDEEP

49152:OwVYlfBUDiZx8Fa/Q0NuB3btlnCItWNSwoy:OxPUDQmso0NuBZlnCItM

Score

8^/10

bootkit discovery evasion persistence trojan upx

Malware Config

Signatures

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

DB.EXE

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	DB.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\AEYEGNPWJH = "C:\\Windows\\SysWOW64\\themeuie.exe"	DB.EXE

Drops file in Drivers directory 1 IoCs

Processes:

themeuie.exe

description ioc process

File opened for modification C:\Windows\system32\drivers\etc\hosts themeuie.exe
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

Processes:

DB.EXE

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion DB.EXE

description	ioc	process
File opened for modification	C:\Windows\system32\drivers\etc\hosts	themeuie.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	DB.EXE

Checks computer location settings 2 TTPs 3 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

Ana.exeEN.EXEthemeuie.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	Ana.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	EN.EXE
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	themeuie.exe

Executes dropped EXE 7 IoCs

Processes:

AV.EXEAV2.EXEDB.EXEEN.EXESB.EXEthemeuie.execB17766LeBfF17766.exe

pid process

3132 AV.EXE
3788 AV2.EXE
1832 DB.EXE
220 EN.EXE
2928 SB.EXE
1112 themeuie.exe
1556 cB17766LeBfF17766.exe

pid	process
3132	AV.EXE
3788	AV2.EXE
1832	DB.EXE
220	EN.EXE
2928	SB.EXE
1112	themeuie.exe
1556	cB17766LeBfF17766.exe

UPX packed file 13 IoCs

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

upx

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\DB.EXE	upx
behavioral4/memory/1832-33-0x0000000000400000-0x0000000000445000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\EN.EXE	upx
behavioral4/memory/220-41-0x0000000000400000-0x000000000040A000-memory.dmp	upx
behavioral4/memory/1832-56-0x00000000006A0000-0x0000000000733000-memory.dmp	upx
behavioral4/memory/1832-59-0x00000000006A0000-0x0000000000733000-memory.dmp	upx
behavioral4/memory/1832-61-0x00000000006A0000-0x0000000000733000-memory.dmp	upx
behavioral4/memory/1832-69-0x00000000006A0000-0x0000000000733000-memory.dmp	upx
behavioral4/memory/3788-73-0x0000000000400000-0x00000000004C3000-memory.dmp	upx
behavioral4/memory/1832-74-0x0000000000400000-0x0000000000445000-memory.dmp	upx
behavioral4/memory/220-75-0x0000000000400000-0x000000000040A000-memory.dmp	upx
behavioral4/memory/3788-77-0x0000000000400000-0x00000000004C3000-memory.dmp	upx
behavioral4/memory/1832-157-0x00000000006A0000-0x0000000000733000-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

Processes:

DB.EXE

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

Processes:

SB.EXE

description ioc process

File opened for modification \??\physicaldrive0 SB.EXE
Drops file in System32 directory 2 IoCs

Processes:

DB.EXE

description ioc process

File created C:\Windows\SysWOW64\themeuie.exe DB.EXE
File opened for modification C:\Windows\SysWOW64\themeuie.exe DB.EXE
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Gathers network information 2 TTPs 1 IoCs
Uses commandline utility to view network configuration.

System Information Discovery
T1082

Command and Scripting Interpreter
T1059

Processes:

ipconfig.exe

pid process

2036 ipconfig.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	DB.EXE

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

description	ioc	process
File created	C:\Windows\SysWOW64\themeuie.exe	DB.EXE
File opened for modification	C:\Windows\SysWOW64\themeuie.exe	DB.EXE

pid	process
2036	ipconfig.exe

Suspicious behavior: EnumeratesProcesses 42 IoCs

Processes:

DB.EXEAV2.EXE

pid	process
1832	DB.EXE
1832	DB.EXE
1832	DB.EXE
1832	DB.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE
3788	AV2.EXE

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

DB.EXEAV2.EXEEN.EXESB.EXE

description	pid	process
Token: SeDebugPrivilege	1832	DB.EXE
Token: SeDebugPrivilege	3788	AV2.EXE
Token: SeIncBasePriorityPrivilege	220	EN.EXE
Token: SeShutdownPrivilege	2928	SB.EXE

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

themeuie.exe

pid process

1112 themeuie.exe

pid	process
1112	themeuie.exe

Suspicious use of WriteProcessMemory 27 IoCs

Processes:

Ana.exeDB.EXEEN.EXEthemeuie.exe

description	pid	process	target process
PID 2356 wrote to memory of 3132	2356	Ana.exe	AV.EXE
PID 2356 wrote to memory of 3132	2356	Ana.exe	AV.EXE
PID 2356 wrote to memory of 3132	2356	Ana.exe	AV.EXE
PID 2356 wrote to memory of 3788	2356	Ana.exe	AV2.EXE
PID 2356 wrote to memory of 3788	2356	Ana.exe	AV2.EXE
PID 2356 wrote to memory of 3788	2356	Ana.exe	AV2.EXE
PID 2356 wrote to memory of 1832	2356	Ana.exe	DB.EXE
PID 2356 wrote to memory of 1832	2356	Ana.exe	DB.EXE
PID 2356 wrote to memory of 1832	2356	Ana.exe	DB.EXE
PID 2356 wrote to memory of 220	2356	Ana.exe	EN.EXE
PID 2356 wrote to memory of 220	2356	Ana.exe	EN.EXE
PID 2356 wrote to memory of 220	2356	Ana.exe	EN.EXE
PID 2356 wrote to memory of 2928	2356	Ana.exe	SB.EXE
PID 2356 wrote to memory of 2928	2356	Ana.exe	SB.EXE
PID 2356 wrote to memory of 2928	2356	Ana.exe	SB.EXE
PID 1832 wrote to memory of 1112	1832	DB.EXE	themeuie.exe
PID 1832 wrote to memory of 1112	1832	DB.EXE	themeuie.exe
PID 1832 wrote to memory of 1112	1832	DB.EXE	themeuie.exe
PID 220 wrote to memory of 1908	220	EN.EXE	cmd.exe
PID 220 wrote to memory of 1908	220	EN.EXE	cmd.exe
PID 220 wrote to memory of 1908	220	EN.EXE	cmd.exe
PID 1832 wrote to memory of 2400	1832	DB.EXE	cmd.exe
PID 1832 wrote to memory of 2400	1832	DB.EXE	cmd.exe
PID 1832 wrote to memory of 2400	1832	DB.EXE	cmd.exe
PID 1112 wrote to memory of 2036	1112	themeuie.exe	ipconfig.exe
PID 1112 wrote to memory of 2036	1112	themeuie.exe	ipconfig.exe
PID 1112 wrote to memory of 2036	1112	themeuie.exe	ipconfig.exe

C:\Users\Admin\AppData\Local\Temp\Ana.exe
"C:\Users\Admin\AppData\Local\Temp\Ana.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2356

C:\Users\Admin\AppData\Local\Temp\AV.EXE
"C:\Users\Admin\AppData\Local\Temp\AV.EXE"
2⤵
- Executes dropped EXE
PID:3132

C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
dw20.exe -x -s 948
3⤵
PID:1892

C:\Users\Admin\AppData\Local\Temp\AV2.EXE
"C:\Users\Admin\AppData\Local\Temp\AV2.EXE"
2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3788

C:\cB17766LeBfF17766\cB17766LeBfF17766.exe
"\cB17766LeBfF17766\cB17766LeBfF17766.exe" "C:\Users\Admin\AppData\Local\Temp\AV2.EXE"
3⤵
- Executes dropped EXE
PID:1556

C:\Users\Admin\AppData\Local\Temp\DB.EXE
"C:\Users\Admin\AppData\Local\Temp\DB.EXE"
2⤵
- Adds policy Run key to start application
- 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
- Suspicious use of WriteProcessMemory
PID:1832

C:\Windows\SysWOW64\themeuie.exe
C:\Windows\SysWOW64\themeuie.exe
3⤵
- Drops file in Drivers directory
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1112

C:\Windows\SysWOW64\ipconfig.exe
"C:\Windows\system32\ipconfig.exe" /flushdns
4⤵
- Gathers network information
PID:2036

C:\Windows\SysWOW64\cmd.exe
/c C:\Users\Admin\AppData\Local\Temp\~unins7046.bat "C:\Users\Admin\AppData\Local\Temp\DB.EXE"
3⤵
PID:2400

C:\Users\Admin\AppData\Local\Temp\EN.EXE
"C:\Users\Admin\AppData\Local\Temp\EN.EXE"
2⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:220

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\EN.EXE > nul
3⤵
PID:1908

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:2928

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 3788 -ip 3788
1⤵
PID:792

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Command and Scripting Interpreter

T1059

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Pre-OS Boot

T1542

Bootkit

T1542.003

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:\Users\Admin\AppData\Local\Temp\AV.EXE
Filesize
1.1MB

MD5
f284568010505119f479617a2e7dc189

SHA1
e23707625cce0035e3c1d2255af1ed326583a1ea

SHA256
26c8f13ea8dc17443a9fa005610537cb6700aebaf748e747e9278d504e416eb1

SHA512
ebe96e667dfde547c5a450b97cd7534b977f4073c7f4cbc123a0e00baaefeb3be725c1cafbfb5bb040b3359267954cd1b4e2094ef71fc273732016ee822064bf

Download Submit
C:\Users\Admin\AppData\Local\Temp\AV2.EXE
Filesize
368KB

MD5
014578edb7da99e5ba8dd84f5d26dfd5

SHA1
df56d701165a480e925a153856cbc3ab799c5a04

SHA256
4ce5e8b510895abb204f97e883d8cbaacc29ccef0844d9ae81f8666f234b0529

SHA512
bd5159af96d83fc7528956c5b1bd6f93847db18faa0680c6041f87bbebef5e3ba2de1f185d77ff28b8d7d78ec4f7bd54f48b37a16da39f43314ef022b4a36068

Download Submit
C:\Users\Admin\AppData\Local\Temp\DB.EXE
Filesize
243KB

MD5
c6746a62feafcb4fca301f606f7101fa

SHA1
e09cd1382f9ceec027083b40e35f5f3d184e485f

SHA256
b5a255d0454853c8afc0b321e1d86dca22c3dbefb88e5d385d2d72f9bc0109e6

SHA512
ee5dfa08c86bf1524666f0851c729970dbf0b397db9595a2bae01516299344edb68123e976592a83e492f2982fafe8d350ba2d41368eb4ecf4e6fe12af8f5642

Download Submit
C:\Users\Admin\AppData\Local\Temp\EN.EXE
Filesize
6KB

MD5
621f2279f69686e8547e476b642b6c46

SHA1
66f486cd566f86ab16015fe74f50d4515decce88

SHA256
c17a18cf2c243303b8a6688aad83b3e6e9b727fcd89f69065785ef7f1a2a3e38

SHA512
068402b02f1056b722f21b0a354b038f094d02e4a066b332553cd6b36e3640e8f35aa0499a2b057c566718c3593d3cea6bbabd961e04f0a001fd45d8be8e1c4e

Download Submit
C:\Users\Admin\AppData\Local\Temp\GB.EXE
Filesize
149KB

MD5
fe731b4c6684d643eb5b55613ef9ed31

SHA1
cfafe2a14f5413278304920154eb467f7c103c80

SHA256
e7953daad7a68f8634ded31a21a31f0c2aa394ca9232e2f980321f7b69176496

SHA512
f7756d69138df6d3b0ffa47bdf274e5fd8aab4fff9d68abe403728c8497ac58e0f3d28d41710de715f57b7a2b5daa2dd7e04450f19c6d013a08f543bd6fc9c2e

Download Submit
C:\Users\Admin\AppData\Local\Temp\SB.EXE
Filesize
224KB

MD5
9252e1be9776af202d6ad5c093637022

SHA1
6cc686d837cd633d9c2e8bc1eaba5fc364bf71d8

SHA256
ce822ff86e584f15b6abd14c61453bd3b481d4ec3fdeb961787fceb52acd8bd6

SHA512
98b1b3ce4d16d36f738478c6cf41e8f4a57d3a5ecfa8999d45592f79a469d8af8554bf4d5db34cb79cec71ce103f4fde1b41bd3cce30714f803e432e53da71ea

Download Submit
C:\Users\Admin\AppData\Local\Temp\tsa.crt
Filesize
1010B

MD5
6e630504be525e953debd0ce831b9aa0

SHA1
edfa47b3edf98af94954b5b0850286a324608503

SHA256
2563fe2f793f119a1bae5cca6eab9d8c20409aa1f1e0db341c623e1251244ef5

SHA512
bbcf285309a4d5605e19513c77ef077a4c451cbef04e3cbdfec6d15cc157a9800a7ff6f70964b0452ddb939ff50766e887904eda06a9999fdedf5b2e8776ebd2

Download Submit
C:\Users\Admin\AppData\Local\Temp\~unins7046.bat
Filesize
49B

MD5
9e0a2f5ab30517809b95a1ff1dd98c53

SHA1
5c1eefdf10e67d1e9216e2e3f5e92352d583c9ce

SHA256
97ac9fee75a1f7b63b3115e9c4fb9dda80b1caba26d2fb51325670dee261fe32

SHA512
e959cc1fd48fb1cccf135a697924c775a3812bab211fc7f9b00c5a9d617261d84c5d6f7cb548774c1e8f46811b06ca39c5603d0e10cbcb7b805f9abbe49b9b42

Download Submit
C:\Windows\SysWOW64\themeuie.exe
Filesize
101KB

MD5
415c7e7096e9148f2cf263fbb1044a43

SHA1
563550cbfb40231906780d719653cea6834c1ceb

SHA256
25b2281fc42d6d572bf3737708ffbf7638c35455a8b21b3c5b0dda23ce667760

SHA512
940a754c35fab2a18ca1f4d0d6497d2bb241289d10ecb03b48c1074d55cf1f44e7497639323ebaaba7b8dbd4740f78143f91ed5492b777e41379aa13df465a6a

Download Submit
C:\cB17766LeBfF17766\cB17766LeBfF17766.exe
Filesize
368KB

MD5
06c788f240b22bd617a3ef8bf082566d

SHA1
62e62ff73f2b83258ecfb7d7c2841d674894cd4e

SHA256
b0c750ea8630e7a54e93ff364371d38ff030630c5458ca9600863f82816af0e6

SHA512
0a96f50b05d8acd9391bbc5c28f4050714cb68c5ca54c9b7adab9dae4f883b4099b4a513771e619da3afd25f65f351598bb722af2f536c097caa794ef1e4b982

Download Submit
memory/220-41-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/220-75-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/1832-74-0x0000000000400000-0x0000000000445000-memory.dmp

Filesize
276KB

Download
memory/1832-61-0x00000000006A0000-0x0000000000733000-memory.dmp

Filesize
588KB

Download
memory/1832-33-0x0000000000400000-0x0000000000445000-memory.dmp

Filesize
276KB

Download
memory/1832-34-0x00000000001C0000-0x00000000001F1000-memory.dmp

Filesize
196KB

Download
memory/1832-56-0x00000000006A0000-0x0000000000733000-memory.dmp

Filesize
588KB

Download
memory/1832-157-0x00000000006A0000-0x0000000000733000-memory.dmp

Filesize
588KB

Download
memory/1832-59-0x00000000006A0000-0x0000000000733000-memory.dmp

Filesize
588KB

Download
memory/1832-70-0x00000000008B0000-0x00000000008B1000-memory.dmp

Filesize
4KB

Download
memory/1832-69-0x00000000006A0000-0x0000000000733000-memory.dmp

Filesize
588KB

Download
memory/2928-68-0x00000000008EB000-0x00000000008EC000-memory.dmp

Filesize
4KB

Download
memory/2928-63-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/2928-67-0x00000000008E0000-0x0000000000944000-memory.dmp

Filesize
400KB

Download
memory/2928-62-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/2928-71-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/3132-66-0x0000000073A00000-0x0000000073FB1000-memory.dmp

Filesize
5.7MB

Download
memory/3132-164-0x0000000073A00000-0x0000000073FB1000-memory.dmp

Filesize
5.7MB

Download
memory/3132-64-0x0000000073A00000-0x0000000073FB1000-memory.dmp

Filesize
5.7MB

Download
memory/3132-65-0x00000000018E0000-0x00000000018F0000-memory.dmp

Filesize
64KB

Download
memory/3132-187-0x00000000018E0000-0x00000000018F0000-memory.dmp

Filesize
64KB

Download
memory/3788-77-0x0000000000400000-0x00000000004C3000-memory.dmp

Filesize
780KB

Download
memory/3788-78-0x0000000000630000-0x0000000000631000-memory.dmp

Filesize
4KB

Download
memory/3788-72-0x0000000000620000-0x0000000000623000-memory.dmp

Filesize
12KB

Download
memory/3788-73-0x0000000000400000-0x00000000004C3000-memory.dmp

Filesize
780KB

Download