2c8fbaab0bb4085632595ab9224c9501cb9b6a0ff65290b4fb05bed13f005353

Analysis

max time kernel
93s
max time network
94s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
23-11-2024 13:04

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General

Target

yerex.exe
Size

25.2MB
MD5

0bbb4624436007933ff6dc22b1820f18
SHA1

b7733a8d52b60a0909ecc45237a3679354220908
SHA256

98cb3e01c7990a6222f387adda3a1e3c4316d7b68f3da250dc6754ee0086c6cc
SHA512

6a7161030b49374c5c46f37ea12f82d2500ca76f10e9abeeb2a55421385d075e771c3ff4a74ed35f01b6d0c651f5e51dcf63fe0db9a40196225db335e3e07cd3
SSDEEP

786432:xhnEKv3rAKZaCdT0kjZeVBy7DbWF1snuI/kaJ4dHA:vnNvrXTmFKn//kax

Score

9^/10

evasion themida trojan

Malware Config

Signatures

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Processes:

yerex.exe

description ioc process

Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ yerex.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	yerex.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

yerex.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	yerex.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	yerex.exe

Executes dropped EXE 1 IoCs

Processes:

main.exe

pid process

4884 main.exe

Loads dropped DLL 22 IoCs

Processes:

main.exe

pid	process
4884	main.exe
4884	main.exe
4884	main.exe
4884	main.exe
4884	main.exe
4884	main.exe
4884	main.exe
4884	main.exe
4884	main.exe
4884	main.exe
4884	main.exe
4884	main.exe
4884	main.exe
4884	main.exe
4884	main.exe
4884	main.exe
4884	main.exe
4884	main.exe
4884	main.exe
4884	main.exe
4884	main.exe
4884	main.exe

Themida packer 7 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
behavioral2/memory/4216-0-0x0000000140000000-0x0000000141F87000-memory.dmp	themida
behavioral2/memory/4216-3-0x0000000140000000-0x0000000141F87000-memory.dmp	themida
behavioral2/memory/4216-2-0x0000000140000000-0x0000000141F87000-memory.dmp	themida
behavioral2/memory/4216-4-0x0000000140000000-0x0000000141F87000-memory.dmp	themida
behavioral2/memory/4216-5-0x0000000140000000-0x0000000141F87000-memory.dmp	themida
behavioral2/memory/4216-1045-0x0000000140000000-0x0000000141F87000-memory.dmp	themida
behavioral2/memory/4216-2018-0x0000000140000000-0x0000000141F87000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

yerex.exe

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA yerex.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

yerex.exe

pid process

4216 yerex.exe

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

pid	process
4216	yerex.exe

Embeds OpenSSL 1 IoCs

Embeds OpenSSL, may be used to circumvent TLS interception.

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\cryptography\hazmat\bindings\_rust.pyd	embeds_openssl

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

System Information Discovery
T1082
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

main.exe

description pid process

Token: SeDebugPrivilege 4884 main.exe
Suspicious use of WriteProcessMemory 2 IoCs

Processes:

yerex.exe

description pid process target process

PID 4216 wrote to memory of 4884 4216 yerex.exe main.exe
PID 4216 wrote to memory of 4884 4216 yerex.exe main.exe

description	pid	process
Token: SeDebugPrivilege	4884	main.exe

description	pid	process	target process
PID 4216 wrote to memory of 4884	4216	yerex.exe	main.exe
PID 4216 wrote to memory of 4884	4216	yerex.exe	main.exe

C:\Users\Admin\AppData\Local\Temp\yerex.exe
"C:\Users\Admin\AppData\Local\Temp\yerex.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of WriteProcessMemory
PID:4216
- C:\Users\Admin\AppData\Local\Temp\onefile_4216_133768407610071893\main.exe
  C:\Users\Admin\AppData\Local\Temp\yerex.exe
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of AdjustPrivilegeToken
  PID:4884

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:3480

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\VCRUNTIME140_1.dll

Filesize
48KB

MD5
f8dfa78045620cf8a732e67d1b1eb53d

SHA1
ff9a604d8c99405bfdbbf4295825d3fcbc792704

SHA256
a113f192195f245f17389e6ecbed8005990bcb2476ddad33f7c4c6c86327afe5

SHA512
ba7f8b7ab0deb7a7113124c28092b543e216ca08d1cf158d9f40a326fb69f4a2511a41a59ea8482a10c9ec4ec8ac69b70dfe9ca65e525097d93b819d498da371

Download Submit
C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\_bz2.pyd

Filesize
83KB

MD5
5bebc32957922fe20e927d5c4637f100

SHA1
a94ea93ee3c3d154f4f90b5c2fe072cc273376b3

SHA256
3ed0e5058d370fb14aa5469d81f96c5685559c054917c7280dd4125f21d25f62

SHA512
afbe80a73ee9bd63d9ffa4628273019400a75f75454667440f43beb253091584bf9128cbb78ae7b659ce67a5faefdba726edb37987a4fe92f082d009d523d5d6

Download Submit
C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\_hashlib.pyd

Filesize
64KB

MD5
da02cefd8151ecb83f697e3bd5280775

SHA1
1c5d0437eb7e87842fde55241a5f0ca7f0fc25e7

SHA256
fd77a5756a17ec0788989f73222b0e7334dd4494b8c8647b43fe554cf3cfb354

SHA512
a13bc5c481730f48808905f872d92cb8729cc52cfb4d5345153ce361e7d6586603a58b964a1ebfd77dd6222b074e5dcca176eaaefecc39f75496b1f8387a2283

Download Submit
C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\_wmi.pyd

Filesize
36KB

MD5
8a9a59559c614fc2bcebb50073580c88

SHA1
4e4ced93f2cb5fe6a33c1484a705e10a31d88c4d

SHA256
752fb80edb51f45d3cc1c046f3b007802432b91aef400c985640d6b276a67c12

SHA512
9b17c81ff89a41307740371cb4c2f5b0cf662392296a7ab8e5a9eba75224b5d9c36a226dce92884591636c343b8238c19ef61c1fdf50cc5aa2da86b1959db413

Download Submit
C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\cryptography\hazmat\bindings\_rust.pyd

Filesize
6.9MB

MD5
12a7c0d35ccbd002150bb29ddd7e8440

SHA1
f16d9a4654dc76b3cfada387ff7bdddb0b18b79a

SHA256
7e22d579ac503b959268964102c03d4e96c8a9b74186158b8c82fdc8cf9d9522

SHA512
c9e5e68de8f51f91cbba839b4fece1db4da7480890a6c7318a78deaa30191fcb8913ba447f45d4ae93b986f3246f09f8cc721e781ce020110a3bb5628b3ef9f7

Download Submit
C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\libcrypto-3.dll

Filesize
5.0MB

MD5
e547cf6d296a88f5b1c352c116df7c0c

SHA1
cafa14e0367f7c13ad140fd556f10f320a039783

SHA256
05fe080eab7fc535c51e10c1bd76a2f3e6217f9c91a25034774588881c3f99de

SHA512
9f42edf04c7af350a00fa4fdf92b8e2e6f47ab9d2d41491985b20cd0adde4f694253399f6a88f4bdd765c4f49792f25fb01e84ec03fd5d0be8bb61773d77d74d

Download Submit
C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\libffi-8.dll

Filesize
38KB

MD5
0f8e4992ca92baaf54cc0b43aaccce21

SHA1
c7300975df267b1d6adcbac0ac93fd7b1ab49bd2

SHA256
eff52743773eb550fcc6ce3efc37c85724502233b6b002a35496d828bd7b280a

SHA512
6e1b223462dc124279bfca74fd2c66fe18b368ffbca540c84e82e0f5bcbea0e10cc243975574fa95ace437b9d8b03a446ed5ee0c9b1b094147cefaf704dfe978

Download Submit
C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\psutil\_psutil_windows.pyd

Filesize
65KB

MD5
3cba71b6bc59c26518dc865241add80a

SHA1
7e9c609790b1de110328bbbcbb4cd09b7150e5bd

SHA256
e10b73d6e13a5ae2624630f3d8535c5091ef403db6a00a2798f30874938ee996

SHA512
3ef7e20e382d51d93c707be930e12781636433650d0a2c27e109ebebeba1f30ea3e7b09af985f87f67f6b9d2ac6a7a717435f94b9d1585a9eb093a83771b43f2

Download Submit
C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\select.pyd

Filesize
30KB

MD5
d0cc9fc9a0650ba00bd206720223493b

SHA1
295bc204e489572b74cc11801ed8590f808e1618

SHA256
411d6f538bdbaf60f1a1798fa8aa7ed3a4e8fcc99c9f9f10d21270d2f3742019

SHA512
d3ebcb91d1b8aa247d50c2c4b2ba1bf3102317c593cbf6c63883e8bf9d6e50c0a40f149654797abc5b4f17aee282ddd972a8cd9189bfcd5b9cec5ab9c341e20b

Download Submit
C:\Users\Admin\AppData\Local\Temp\onefile_4216_133768407610071893\_asyncio.pyd

Filesize
69KB

MD5
477dba4d6e059ea3d61fad7b6a7da10e

SHA1
1f23549e60016eeed508a30479886331b22f7a8b

SHA256
5bebeb765ab9ef045bc5515166360d6f53890d3ad6fc360c20222d61841410b6

SHA512
8119362c2793a4c5da25a63ca68aa3b144db7e4c08c80cbe8c8e7e8a875f1bd0c30e497208ce20961ddb38d3363d164b6e1651d3e030ed7b8ee5f386faf809d2

Download Submit
C:\Users\Admin\AppData\Local\Temp\onefile_4216_133768407610071893\_cffi_backend.pyd

Filesize
178KB

MD5
0572b13646141d0b1a5718e35549577c

SHA1
eeb40363c1f456c1c612d3c7e4923210eae4cdf7

SHA256
d8a76d1e31bbd62a482dea9115fc1a109cb39af4cf6d1323409175f3c93113a7

SHA512
67c28432ca8b389acc26e47eb8c4977fddd4af9214819f89df07fecbc8ed750d5f35807a1b195508dd1d77e2a7a9d7265049dcfbfe7665a7fd1ba45da1e4e842

Download Submit
C:\Users\Admin\AppData\Local\Temp\onefile_4216_133768407610071893\_ctypes.pyd

Filesize
122KB

MD5
fb454c5e74582a805bc5e9f3da8edc7b

SHA1
782c3fa39393112275120eaf62fc6579c36b5cf8

SHA256
74e0e8384f6c2503215f4cf64c92efe7257f1aec44f72d67ad37dc8ba2530bc1

SHA512
727ada80098f07849102c76b484e9a61fb0f7da328c0276d82c6ee08213682c89deeb8459139a3fbd7f561bffaca91650a429e1b3a1ff8f341cebdf0bfa9b65d

Download Submit
C:\Users\Admin\AppData\Local\Temp\onefile_4216_133768407610071893\_lzma.pyd

Filesize
156KB

MD5
195defe58a7549117e06a57029079702

SHA1
3795b02803ca37f399d8883d30c0aa38ad77b5f2

SHA256
7bf9ff61babebd90c499a8ed9b62141f947f90d87e0bbd41a12e99d20e06954a

SHA512
c47a9b1066dd9744c51ed80215bd9645aab6cc9d6a3f9df99f618e3dd784f6c7ce6f53eabe222cf134ee649250834193d5973e6e88f8a93151886537c62e2e2b

Download Submit
C:\Users\Admin\AppData\Local\Temp\onefile_4216_133768407610071893\_overlapped.pyd

Filesize
54KB

MD5
7e4553ca5c269e102eb205585cc3f6b4

SHA1
73a60dbc7478877689c96c37107e66b574ba59c9

SHA256
d5f89859609371393d379b5ffd98e5b552078050e8b02a8e2900fa9b4ee8ff91

SHA512
65b72bc603e633596d359089c260ee3d8093727c4781bff1ec0b81c8244af68f69ff3141424c5de12355c668ae3366b4385a0db7455486c536a13529c47b54ef

Download Submit
C:\Users\Admin\AppData\Local\Temp\onefile_4216_133768407610071893\_socket.pyd

Filesize
81KB

MD5
dd8ff2a3946b8e77264e3f0011d27704

SHA1
a2d84cfc4d6410b80eea4b25e8efc08498f78990

SHA256
b102522c23dac2332511eb3502466caf842d6bcd092fbc276b7b55e9cc01b085

SHA512
958224a974a3449bcfb97faab70c0a5b594fa130adc0c83b4e15bdd7aab366b58d94a4a9016cb662329ea47558645acd0e0cc6df54f12a81ac13a6ec0c895cd8

Download Submit
C:\Users\Admin\AppData\Local\Temp\onefile_4216_133768407610071893\_ssl.pyd

Filesize
174KB

MD5
c87c5890039c3bdb55a8bc189256315f

SHA1
84ef3c2678314b7f31246471b3300da65cb7e9de

SHA256
a5d361707f7a2a2d726b20770e8a6fc25d753be30bcbcbbb683ffee7959557c2

SHA512
e750dc36ae00249ed6da1c9d816f1bd7f8bc84ddea326c0cd0410dbcfb1a945aac8c130665bfacdccd1ee2b7ac097c6ff241bfc6cc39017c9d1cde205f460c44

Download Submit
C:\Users\Admin\AppData\Local\Temp\onefile_4216_133768407610071893\_uuid.pyd

Filesize
25KB

MD5
50521b577719195d7618a23b3103d8aa

SHA1
7020d2e107000eaf0eddde74bc3809df2c638e22

SHA256
acbf831004fb8b8d5340fe5debd9814c49bd282dd765c78faeb6bb5116288c78

SHA512
4ee950da8bbbd36932b488ec62fa046ac8fc35783a146edadbe063b8419a63d4dfb5bbd8c45e9e008fe708e6fc4a1fee1202fce92ffc95320547ba714fed95e1

Download Submit
C:\Users\Admin\AppData\Local\Temp\onefile_4216_133768407610071893\libssl-3.dll

Filesize
768KB

MD5
19a2aba25456181d5fb572d88ac0e73e

SHA1
656ca8cdfc9c3a6379536e2027e93408851483db

SHA256
2e9fbcd8f7fdc13a5179533239811456554f2b3aa2fb10e1b17be0df81c79006

SHA512
df17dc8a882363a6c5a1b78ba3cf448437d1118ccc4a6275cc7681551b13c1a4e0f94e30ffb94c3530b688b62bff1c03e57c2c185a7df2bf3e5737a06e114337

Download Submit
C:\Users\Admin\AppData\Local\Temp\onefile_4216_133768407610071893\main.exe

Filesize
30.4MB

MD5
2173bde8e47c7babfafdccdccad66fa2

SHA1
46733948c63f36de3eb171abe82d3c472a63bdcd

SHA256
44d04386761298d8890a11562e1bc7e93e2d40ab9b5dc838f9b79d289ae8b58a

SHA512
38134e6bbe888bedb2874f13e21b9a7b1ca4bc3e7c10f9297deb7d24f9a758c7d59b9a6a51db0bf48f6f0f9843cc0e8cec750c753e4e0e1c0f52309f6dd4ce11

Download Submit
C:\Users\Admin\AppData\Local\Temp\onefile_4216_133768407610071893\python3.dll

Filesize
66KB

MD5
a07661c5fad97379cf6d00332999d22c

SHA1
dca65816a049b3cce5c4354c3819fef54c6299b0

SHA256
5146005c36455e7ede4b8ecc0dc6f6fa8ea6b4a99fedbabc1994ae27dfab9d1b

SHA512
6ddeb9d89ccb4d2ec5d994d85a55e5e2cc7af745056dae030ab8d72ee7830f672003f4675b6040f123fc64c19e9b48cabd0da78101774dafacf74a88fbd74b4d

Download Submit
C:\Users\Admin\AppData\Local\Temp\onefile_4216_133768407610071893\python312.dll

Filesize
6.6MB

MD5
d521654d889666a0bc753320f071ef60

SHA1
5fd9b90c5d0527e53c199f94bad540c1e0985db6

SHA256
21700f0bad5769a1b61ea408dc0a140ffd0a356a774c6eb0cc70e574b929d2e2

SHA512
7a726835423a36de80fb29ef65dfe7150bd1567cac6f3569e24d9fe091496c807556d0150456429a3d1a6fd2ed0b8ae3128ea3b8674c97f42ce7c897719d2cd3

Download Submit
C:\Users\Admin\AppData\Local\Temp\onefile_4216_133768407610071893\vcruntime140.dll

Filesize
116KB

MD5
be8dbe2dc77ebe7f88f910c61aec691a

SHA1
a19f08bb2b1c1de5bb61daf9f2304531321e0e40

SHA256
4d292623516f65c80482081e62d5dadb759dc16e851de5db24c3cbb57b87db83

SHA512
0da644472b374f1da449a06623983d0477405b5229e386accadb154b43b8b083ee89f07c3f04d2c0c7501ead99ad95aecaa5873ff34c5eeb833285b598d5a655

Download Submit
memory/4216-0-0x0000000140000000-0x0000000141F87000-memory.dmp

Filesize
31.5MB

Download
memory/4216-5-0x0000000140000000-0x0000000141F87000-memory.dmp

Filesize
31.5MB

Download
memory/4216-4-0x0000000140000000-0x0000000141F87000-memory.dmp

Filesize
31.5MB

Download
memory/4216-2-0x0000000140000000-0x0000000141F87000-memory.dmp

Filesize
31.5MB

Download
memory/4216-3-0x0000000140000000-0x0000000141F87000-memory.dmp

Filesize
31.5MB

Download
memory/4216-1-0x00007FFEDB010000-0x00007FFEDB012000-memory.dmp

Filesize
8KB

Download
memory/4216-1045-0x0000000140000000-0x0000000141F87000-memory.dmp

Filesize
31.5MB

Download
memory/4216-2018-0x0000000140000000-0x0000000141F87000-memory.dmp

Filesize
31.5MB

Download