Malware Analysis Report

2024-10-10 08:08

Sample ID 240610-x569tsxhmk
Target E4Bootstrapper.exe
SHA256 9d7cf052119784f65aca998c6e0c87f662e9423e51e1a3475e83d24f3b3b47e3
Tags
evasion themida trojan
score
9/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
9/10

SHA256

9d7cf052119784f65aca998c6e0c87f662e9423e51e1a3475e83d24f3b3b47e3

Threat Level: Likely malicious

The file E4Bootstrapper.exe was found to be: Likely malicious.

Malicious Activity Summary

evasion themida trojan

Identifies VirtualBox via ACPI registry values (likely anti-VM)

Sets file to hidden

Checks BIOS information in registry

Executes dropped EXE

Themida packer

Loads dropped DLL

Legitimate hosting services abused for malware hosting/C2

Checks whether UAC is enabled

Suspicious use of NtSetInformationThreadHideFromDebugger

Unsigned PE

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

Views/modifies file attributes

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-10 19:27

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-10 19:27

Reported

2024-06-10 19:27

Platform

win10-20240404-en

Max time kernel

16s

Max time network

18s

Command Line

"C:\Users\Admin\AppData\Local\Temp\E4Bootstrapper.exe"

Signatures

Identifies VirtualBox via ACPI registry values (likely anti-VM)

evasion
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ C:\Users\Admin\AppData\Local\Temp\Solara.Dir\cd57e4c171d6e8f5ea8b8f824a6a7316.exe N/A

Sets file to hidden

evasion
Description Indicator Process Target
N/A N/A C:\Windows\System32\attrib.exe N/A
N/A N/A C:\Windows\System32\attrib.exe N/A

Checks BIOS information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion C:\Users\Admin\AppData\Local\Temp\Solara.Dir\cd57e4c171d6e8f5ea8b8f824a6a7316.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion C:\Users\Admin\AppData\Local\Temp\Solara.Dir\cd57e4c171d6e8f5ea8b8f824a6a7316.exe N/A

Themida packer

themida
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Checks whether UAC is enabled

evasion trojan
Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA C:\Users\Admin\AppData\Local\Temp\Solara.Dir\cd57e4c171d6e8f5ea8b8f824a6a7316.exe N/A

Legitimate hosting services abused for malware hosting/C2

Description Indicator Process Target
N/A raw.githubusercontent.com N/A N/A
N/A raw.githubusercontent.com N/A N/A
N/A raw.githubusercontent.com N/A N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Solara.Dir\cd57e4c171d6e8f5ea8b8f824a6a7316.exe N/A

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\E4.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2752 wrote to memory of 1316 N/A C:\Users\Admin\AppData\Local\Temp\E4Bootstrapper.exe C:\Users\Admin\AppData\Local\Temp\E4.exe
PID 2752 wrote to memory of 1316 N/A C:\Users\Admin\AppData\Local\Temp\E4Bootstrapper.exe C:\Users\Admin\AppData\Local\Temp\E4.exe
PID 2752 wrote to memory of 4416 N/A C:\Users\Admin\AppData\Local\Temp\E4Bootstrapper.exe C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe
PID 2752 wrote to memory of 4416 N/A C:\Users\Admin\AppData\Local\Temp\E4Bootstrapper.exe C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe
PID 2752 wrote to memory of 4416 N/A C:\Users\Admin\AppData\Local\Temp\E4Bootstrapper.exe C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe
PID 1316 wrote to memory of 344 N/A C:\Users\Admin\AppData\Local\Temp\E4.exe C:\Windows\System32\attrib.exe
PID 1316 wrote to memory of 344 N/A C:\Users\Admin\AppData\Local\Temp\E4.exe C:\Windows\System32\attrib.exe
PID 1316 wrote to memory of 1596 N/A C:\Users\Admin\AppData\Local\Temp\E4.exe C:\Windows\System32\attrib.exe
PID 1316 wrote to memory of 1596 N/A C:\Users\Admin\AppData\Local\Temp\E4.exe C:\Windows\System32\attrib.exe
PID 4416 wrote to memory of 2032 N/A C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe C:\Users\Admin\AppData\Local\Temp\Solara.Dir\cd57e4c171d6e8f5ea8b8f824a6a7316.exe
PID 4416 wrote to memory of 2032 N/A C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe C:\Users\Admin\AppData\Local\Temp\Solara.Dir\cd57e4c171d6e8f5ea8b8f824a6a7316.exe

Views/modifies file attributes

evasion
Description Indicator Process Target
N/A N/A C:\Windows\System32\attrib.exe N/A
N/A N/A C:\Windows\System32\attrib.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\E4Bootstrapper.exe

"C:\Users\Admin\AppData\Local\Temp\E4Bootstrapper.exe"

C:\Users\Admin\AppData\Local\Temp\E4.exe

"C:\Users\Admin\AppData\Local\Temp\E4.exe"

C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe

"C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe"

C:\Windows\System32\attrib.exe

"C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\$77MicrosoftData"

C:\Windows\System32\attrib.exe

"C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\$77MicrosoftData\$77$77svchost.exe.exe"

C:\Users\Admin\AppData\Local\Temp\Solara.Dir\cd57e4c171d6e8f5ea8b8f824a6a7316.exe

"C:\Users\Admin\AppData\Local\Temp\Solara.Dir\cd57e4c171d6e8f5ea8b8f824a6a7316.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 github.com udp
GB 20.26.156.215:443 github.com tcp
US 8.8.8.8:53 raw.githubusercontent.com udp
US 185.199.108.133:443 raw.githubusercontent.com tcp
US 8.8.8.8:53 215.156.26.20.in-addr.arpa udp
US 8.8.8.8:53 133.108.199.185.in-addr.arpa udp
US 185.199.108.133:443 raw.githubusercontent.com tcp
N/A 127.0.0.1:51257 tcp
US 8.8.8.8:53 81.144.22.2.in-addr.arpa udp

Files

memory/2752-0-0x0000000000210000-0x0000000000220000-memory.dmp

memory/2752-1-0x00007FF8747A3000-0x00007FF8747A4000-memory.dmp

memory/2752-3-0x00007FF8747A0000-0x00007FF87518C000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\E4.exe

MD5 1cfe818c59790fae5f9f14a9e8279216
SHA1 a59f41a6d3992e2cd1911fb753a56d60d42c924e
SHA256 8188936b9120d45b43047e23cd45ddd4f174454fbeba94d9cf4c3409b1419bc9
SHA512 d189823dbefd4e6d4532bb0be86bd6441802e20eef05d7e963943da6faad0070cf2a314b1f74a9b970bcd666a3c42a46f6d72d4c1a1a335fc55ccd45ef2681ef

C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe

MD5 6557bd5240397f026e675afb78544a26
SHA1 839e683bf68703d373b6eac246f19386bb181713
SHA256 a7fecfc225dfdd4e14dcd4d1b4ba1b9f8e4d1984f1cdd8cda3a9987e5d53c239
SHA512 f2399d34898a4c0c201372d2dd084ee66a66a1c3eae949e568421fe7edada697468ef81f4fcab2afd61eaf97bcb98d6ade2d97295e2f674e93116d142e892e97

memory/1316-13-0x0000000000350000-0x000000000035E000-memory.dmp

memory/1316-15-0x00007FF8747A0000-0x00007FF87518C000-memory.dmp

memory/2752-14-0x00007FF8747A0000-0x00007FF87518C000-memory.dmp

memory/1316-16-0x00007FF8747A0000-0x00007FF87518C000-memory.dmp

memory/4416-19-0x0000000000670000-0x000000000067A000-memory.dmp

memory/4416-20-0x0000000000F30000-0x0000000000F3A000-memory.dmp

memory/4416-22-0x0000000005910000-0x0000000005922000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\Solara.Dir\Monaco\fileaccess\node_modules\get-intrinsic\.nycrc

MD5 d0104f79f0b4f03bbcd3b287fa04cf8c
SHA1 54f9d7adf8943cb07f821435bb269eb4ba40ccc2
SHA256 997785c50b0773e5e18bf15550fbf57823c634fefe623cd37b3c83696402ad0a
SHA512 daf9b5445cfc02397f398adfa0258f2489b70699dfec6ca7e5b85afe5671fdcabe59edee332f718f5e5778feb1e301778dffe93bb28c1c0914f669659bad39c6

C:\Users\Admin\AppData\Local\Temp\Solara.Dir\Monaco\fileaccess\node_modules\hasown\.nycrc

MD5 c2ab942102236f987048d0d84d73d960
SHA1 95462172699187ac02eaec6074024b26e6d71cff
SHA256 948366fea3b423a46366326d0bb2e54b08abd1cf0b243678ba6625740c40da5a
SHA512 e36b20c16ceeb090750f3865efc8d7fd983ae4e8b41c30cc3865d2fd4925bf5902627e1f1ed46c0ff2453f076ef9de34be899ef57754b29cd158440071318479

C:\Users\Admin\AppData\Local\Temp\Solara.Dir\Monaco\fileaccess\node_modules\has-proto\.eslintrc

MD5 c28b0fe9be6e306cc2ad30fe00e3db10
SHA1 af79c81bd61c9a937fca18425dd84cdf8317c8b9
SHA256 0694050195fc694c5846b0a2a66b437ac775da988f0a779c55fb892597f7f641
SHA512 e3eca17804522ffa4f41e836e76e397a310a20e8261a38115b67e8b644444153039d04198fb470f45be2997d2c7a72b15bd4771a02c741b3cbc072ea6ef432e9

C:\Users\Admin\AppData\Local\Temp\Solara.Dir\Monaco\fileaccess\node_modules\vary\LICENSE

MD5 13babc4f212ce635d68da544339c962b
SHA1 4881ad2ec8eb2470a7049421047c6d076f48f1de
SHA256 bd47ce7b88c7759630d1e2b9fcfa170a0f1fde522be09e13fb1581a79d090400
SHA512 40e30174433408e0e2ed46d24373b12def47f545d9183b7bce28d4ddd8c8bb528075c7f20e118f37661db9f1bba358999d81a14425eb3e0a4a20865dfcb53182

C:\Users\Admin\AppData\Local\Temp\Solara.Dir\cd57e4c171d6e8f5ea8b8f824a6a7316.exe

MD5 f8f4522d11178a26e97e2046f249dfa7
SHA1 8b591d9a37716e235260fb6b3f601e4ccbebf15d
SHA256 3c372a8919c28dc76414b2f30da423c3e1018b1a8444527949ce20cc3fc93ed0
SHA512 52ea881cad501cf1d5e8ac47355e862ac1bd39cb6e1ff3d362d392b6f2d676e74878832505d17a552aaa3bc8f3977da11fa3f9903722eedd23716fb46ddb7492

memory/2032-1482-0x000001E36A460000-0x000001E36A47A000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\Solara.Dir\Wpf.Ui.dll

MD5 aead90ab96e2853f59be27c4ec1e4853
SHA1 43cdedde26488d3209e17efff9a51e1f944eb35f
SHA256 46cfbe804b29c500ebc0b39372e64c4c8b4f7a8e9b220b5f26a9adf42fcb2aed
SHA512 f5044f2ee63906287460b9adabfcf3c93c60b51c86549e33474c4d7f81c4f86cd03cd611df94de31804c53006977874b8deb67c4bf9ea1c2b70c459b3a44b38d

memory/2032-1484-0x000001E36CE70000-0x000001E36D3AC000-memory.dmp

memory/2032-1485-0x000001E36CBB0000-0x000001E36CC68000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\Solara.Dir\Microsoft.Web.WebView2.Core.dll

MD5 851fee9a41856b588847cf8272645f58
SHA1 ee185a1ff257c86eb19d30a191bf0695d5ac72a1
SHA256 5e7faee6b8230ca3b97ce9542b914db3abbbd1cb14fd95a39497aaad4c1094ca
SHA512 cf5c70984cf33e12cf57116da1f282a5bd6433c570831c185253d13463b0b9a0b9387d4d1bf4dddab3292a5d9ba96d66b6812e9d7ebc5eb35cb96eea2741348f

memory/2032-1487-0x000001E36CC70000-0x000001E36CCEE000-memory.dmp

memory/2032-1489-0x000001E36A840000-0x000001E36A84E000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\Solara.Dir\Microsoft.Web.WebView2.Wpf.dll

MD5 34ec990ed346ec6a4f14841b12280c20
SHA1 6587164274a1ae7f47bdb9d71d066b83241576f0
SHA256 1e987b22cd011e4396a0805c73539586b67df172df75e3dded16a77d31850409
SHA512 b565015ca4b11b79ecbc8127f1fd40c986948050f1caefdd371d34ed2136af0aabf100863dc6fd16d67e3751d44ee13835ea9bf981ac0238165749c4987d1ae0

C:\Users\Admin\AppData\Local\Temp\Solara.Dir\WebView2Loader.dll

MD5 a0bd0d1a66e7c7f1d97aedecdafb933f
SHA1 dd109ac34beb8289030e4ec0a026297b793f64a3
SHA256 79d7e45f8631e8d2541d01bfb5a49a3a090be72b3d465389a2d684680fee2e36
SHA512 2a50ae5c7234a44b29f82ebc2e3cfed37bf69294eb00b2dc8905c61259975b2f3a059c67aeab862f002752454d195f7191d9b82b056f6ef22d6e1b0bb3673d50

C:\Users\Admin\AppData\Local\Temp\Solara.Dir\cd57e4c171d6e8f5ea8b8f824a6a7316.dll

MD5 987175c463ec9a5e76bab033cea9d859
SHA1 ceed36975f4583a34c26150e045a97f5f019e769
SHA256 24fca8dd76effd975d230f55eb107e1be6c03d658410274fe6340a2b3ec9075c
SHA512 9851d254fef3fdfcd7b188893a9a547ed3f08eee82a72c273f13beb7d075beecd32e3c5c51f9e3135d7060fca71a2bf79dbdbb1a136549a9e408a6214feaa000

C:\Users\Admin\AppData\Local\Temp\Solara.Dir\libcurl.dll

MD5 e31f5136d91bad0fcbce053aac798a30
SHA1 ee785d2546aec4803bcae08cdebfd5d168c42337
SHA256 ee94e2201870536522047e6d7fe7b903a63cd2e13e20c8fffc86d0e95361e671
SHA512 a1543eb1d10d25efb44f9eaa0673c82bfac5173055d04c0f3be4792984635a7c774df57a8e289f840627754a4e595b855d299070d469e0f1e637c3f35274abe6

\Users\Admin\AppData\Local\Temp\Solara.Dir\zlib1.dll

MD5 75365924730b0b2c1a6ee9028ef07685
SHA1 a10687c37deb2ce5422140b541a64ac15534250f
SHA256 945e7f5d09938b7769a4e68f4ef01406e5af9f40db952cba05ddb3431dd1911b
SHA512 c1e31c18903e657203ae847c9af601b1eb38efa95cb5fa7c1b75f84a2cba9023d08f1315c9bb2d59b53256dfdb3bac89930252138475491b21749471adc129a1

\Users\Admin\AppData\Local\Temp\Solara.Dir\vcruntime140.dll

MD5 7a2b8cfcd543f6e4ebca43162b67d610
SHA1 c1c45a326249bf0ccd2be2fbd412f1a62fb67024
SHA256 7d7ca28235fba5603a7f40514a552ac7efaa67a5d5792bb06273916aa8565c5f
SHA512 e38304fb9c5af855c1134f542adf72cde159fab64385533eafa5bb6e374f19b5a29c0cb5516fc5da5c0b5ac47c2f6420792e0ac8ddff11e749832a7b7f3eb5c8

memory/2032-1500-0x0000000180000000-0x0000000180E54000-memory.dmp

memory/2032-1501-0x0000000180000000-0x0000000180E54000-memory.dmp

memory/2032-1503-0x0000000180000000-0x0000000180E54000-memory.dmp

memory/2032-1502-0x0000000180000000-0x0000000180E54000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\Solara.Dir\bin\path.txt

MD5 0e2184f1c7464b6617329fb18f107b4f
SHA1 6f22f98471e33c9db10d6f6f1728e98852e25b8f
SHA256 dbf5f44e1b84a298dbbcad3c31a617d2f6cfa08eb5d16e05a5c28726c574d4eb
SHA512 8e745c0215d52e15702551f29efb882a5eba97b5f279ccc29293b1a9b1b8661bf71b548569f9a99fa35c35a15d1b6b288d3c381c1292418c36dc89e2fa0b3a37

memory/2032-1505-0x000001E371880000-0x000001E371888000-memory.dmp

memory/2032-1506-0x000001E371A60000-0x000001E371A98000-memory.dmp