8f2e28588f2303bd8d7a9b0c3ff6a9cb16fa93f8ddc9c5e0666a8c12d6880ee3

Resubmissions

26-12-2024 11:23

241226-nhhtaavjcj 8

26-12-2024 11:18

241226-nehdcatrfm 7

26-12-2024 11:16

241226-nc9ptatrdl 3

Analysis

max time kernel
147s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20241007-es
resource tags

arch:x64arch:x86image:win11-20241007-eslocale:es-esos:windows11-21h2-x64systemwindows
submitted
26-12-2024 11:18

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General

Target

Bootstrapper.exe
Size

800KB
MD5

02c70d9d6696950c198db93b7f6a835e
SHA1

30231a467a49cc37768eea0f55f4bea1cbfb48e2
SHA256

8f2e28588f2303bd8d7a9b0c3ff6a9cb16fa93f8ddc9c5e0666a8c12d6880ee3
SHA512

431d9b9918553bff4f4a5bc2a5e7b7015f8ad0e2d390bb4d5264d08983372424156524ef5587b24b67d1226856fc630aaca08edc8113097e0094501b4f08efeb
SSDEEP

12288:qhd8cjaLXVh84wEFkW1mocaBj6WtiRPpptHxQ0z:2ycjar84w5W4ocaBj6y2tHDz

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
3316	BootstrapperV2.05.exe
3980	Solara.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
4	pastebin.com
10	pastebin.com

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

pid	Process
1908	ipconfig.exe

Modifies registry class 4 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2253712635-4068079004-3870069674-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoftwindows.client.cbs_cw5n1h2txyewy\Internet Settings\Cache\Content\CachePrefix	BackgroundTransferHost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2253712635-4068079004-3870069674-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoftwindows.client.cbs_cw5n1h2txyewy\Internet Settings\Cache\Cookies\CachePrefix = "Cookie:"	BackgroundTransferHost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2253712635-4068079004-3870069674-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoftwindows.client.cbs_cw5n1h2txyewy\Internet Settings\Cache\History\CachePrefix = "Visited:"	BackgroundTransferHost.exe
Key created	\REGISTRY\USER\S-1-5-21-2253712635-4068079004-3870069674-1000_Classes\Local Settings\MuiCache	BackgroundTransferHost.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
3980	Solara.exe

Suspicious use of AdjustPrivilegeToken 45 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	780	WMIC.exe
Token: SeSecurityPrivilege	780	WMIC.exe
Token: SeTakeOwnershipPrivilege	780	WMIC.exe
Token: SeLoadDriverPrivilege	780	WMIC.exe
Token: SeSystemProfilePrivilege	780	WMIC.exe
Token: SeSystemtimePrivilege	780	WMIC.exe
Token: SeProfSingleProcessPrivilege	780	WMIC.exe
Token: SeIncBasePriorityPrivilege	780	WMIC.exe
Token: SeCreatePagefilePrivilege	780	WMIC.exe
Token: SeBackupPrivilege	780	WMIC.exe
Token: SeRestorePrivilege	780	WMIC.exe
Token: SeShutdownPrivilege	780	WMIC.exe
Token: SeDebugPrivilege	780	WMIC.exe
Token: SeSystemEnvironmentPrivilege	780	WMIC.exe
Token: SeRemoteShutdownPrivilege	780	WMIC.exe
Token: SeUndockPrivilege	780	WMIC.exe
Token: SeManageVolumePrivilege	780	WMIC.exe
Token: 33	780	WMIC.exe
Token: 34	780	WMIC.exe
Token: 35	780	WMIC.exe
Token: 36	780	WMIC.exe
Token: SeIncreaseQuotaPrivilege	780	WMIC.exe
Token: SeSecurityPrivilege	780	WMIC.exe
Token: SeTakeOwnershipPrivilege	780	WMIC.exe
Token: SeLoadDriverPrivilege	780	WMIC.exe
Token: SeSystemProfilePrivilege	780	WMIC.exe
Token: SeSystemtimePrivilege	780	WMIC.exe
Token: SeProfSingleProcessPrivilege	780	WMIC.exe
Token: SeIncBasePriorityPrivilege	780	WMIC.exe
Token: SeCreatePagefilePrivilege	780	WMIC.exe
Token: SeBackupPrivilege	780	WMIC.exe
Token: SeRestorePrivilege	780	WMIC.exe
Token: SeShutdownPrivilege	780	WMIC.exe
Token: SeDebugPrivilege	780	WMIC.exe
Token: SeSystemEnvironmentPrivilege	780	WMIC.exe
Token: SeRemoteShutdownPrivilege	780	WMIC.exe
Token: SeUndockPrivilege	780	WMIC.exe
Token: SeManageVolumePrivilege	780	WMIC.exe
Token: 33	780	WMIC.exe
Token: 34	780	WMIC.exe
Token: 35	780	WMIC.exe
Token: 36	780	WMIC.exe
Token: SeDebugPrivilege	4672	Bootstrapper.exe
Token: SeDebugPrivilege	3316	BootstrapperV2.05.exe
Token: SeDebugPrivilege	3980	Solara.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4672 wrote to memory of 4164	4672	Bootstrapper.exe	78
PID 4672 wrote to memory of 4164	4672	Bootstrapper.exe	78
PID 4164 wrote to memory of 1908	4164	cmd.exe	80
PID 4164 wrote to memory of 1908	4164	cmd.exe	80
PID 4672 wrote to memory of 4320	4672	Bootstrapper.exe	81
PID 4672 wrote to memory of 4320	4672	Bootstrapper.exe	81
PID 4320 wrote to memory of 780	4320	cmd.exe	83
PID 4320 wrote to memory of 780	4320	cmd.exe	83
PID 4672 wrote to memory of 3316	4672	Bootstrapper.exe	85
PID 4672 wrote to memory of 3316	4672	Bootstrapper.exe	85
PID 3316 wrote to memory of 3980	3316	BootstrapperV2.05.exe	86
PID 3316 wrote to memory of 3980	3316	BootstrapperV2.05.exe	86

C:\Users\Admin\AppData\Local\Temp\Bootstrapper.exe
"C:\Users\Admin\AppData\Local\Temp\Bootstrapper.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4672
- C:\Windows\SYSTEM32\cmd.exe
  "cmd" /c ipconfig /all
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4164
- - C:\Windows\system32\ipconfig.exe
    ipconfig /all
    3⤵
    - Gathers network information
    PID:1908
- C:\Windows\SYSTEM32\cmd.exe
  "cmd" /c wmic nicconfig where (IPEnabled=TRUE) call SetDNSServerSearchOrder ("1.1.1.1", "1.0.0.1")
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4320
- - C:\Windows\System32\Wbem\WMIC.exe
    wmic nicconfig where (IPEnabled=TRUE) call SetDNSServerSearchOrder ("1.1.1.1", "1.0.0.1")
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:780
- C:\Users\Admin\AppData\Local\Temp\BootstrapperV2.05.exe
  "C:\Users\Admin\AppData\Local\Temp\BootstrapperV2.05.exe" --oldBootstrapper "C:\Users\Admin\AppData\Local\Temp\Bootstrapper.exe" --isUpdate true
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3316
- - C:\ProgramData\Solara\Solara.exe
    "C:\ProgramData\Solara\Solara.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3980

C:\Windows\system32\BackgroundTransferHost.exe
"BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.13
1⤵
- Modifies registry class
PID:1780

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:944

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\Solara\Newtonsoft.Json.dll

Filesize
695KB

MD5
195ffb7167db3219b217c4fd439eedd6

SHA1
1e76e6099570ede620b76ed47cf8d03a936d49f8

SHA256
e1e27af7b07eeedf5ce71a9255f0422816a6fc5849a483c6714e1b472044fa9d

SHA512
56eb7f070929b239642dab729537dde2c2287bdb852ad9e80b5358c74b14bc2b2dded910d0e3b6304ea27eb587e5f19db0a92e1cbae6a70fb20b4ef05057e4ac

Download Submit
C:\ProgramData\Solara\Solara.exe

Filesize
133KB

MD5
c6f770cbb24248537558c1f06f7ff855

SHA1
fdc2aaae292c32a58ea4d9974a31ece26628fdd7

SHA256
d1e4a542fa75f6a6fb636b5de6f7616e2827a79556d3d9a4afc3ecb47f0beb2b

SHA512
cac56c58bd01341ec3ff102fe04fdb66625baad1d3dd7127907cd8453d2c6e2226ad41033e16ba20413a509fc7c826e4fdc0c0d553175eb6f164c2fc0906614a

Download Submit
C:\ProgramData\Solara\Wpf.Ui.dll

Filesize
5.2MB

MD5
aead90ab96e2853f59be27c4ec1e4853

SHA1
43cdedde26488d3209e17efff9a51e1f944eb35f

SHA256
46cfbe804b29c500ebc0b39372e64c4c8b4f7a8e9b220b5f26a9adf42fcb2aed

SHA512
f5044f2ee63906287460b9adabfcf3c93c60b51c86549e33474c4d7f81c4f86cd03cd611df94de31804c53006977874b8deb67c4bf9ea1c2b70c459b3a44b38d

Download Submit
C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\AC\BackgroundTransferApi\20dcb09c-a473-403f-9a87-553691beb5e0.down_data

Filesize
126KB

MD5
0a110bd321f114ff8727674eee2a490f

SHA1
ed3eed0bc086ef1df640064d483e20487182a215

SHA256
f1f611b30db0431160b742fb7b8a5ae609a7acbd3724810d92e186c65c14c268

SHA512
3c08d7c95e5bb0fbdf87cce4fbf7cb10db1f2d5df8cc3e8c214ae064d1e0a0bbcdb1d599605a04dd0ab8c0c3fe5401e5a75ee8620d219e4e0da0810693bef728

Download Submit
C:\Users\Admin\AppData\Local\Temp\BootstrapperV2.05.exe

Filesize
2.8MB

MD5
241706a4b2aa26c47eb1dbadf12eba14

SHA1
e46f254c6c29bf9371f04b7a27fb1569a7dbba23

SHA256
11b86e51f1f67bc7d59a881aa9cbbb5519c118ea74291476ff61fb9ddbff454e

SHA512
2e876573e2f44491bfe0cc915910f66d030c5e013f36d72e460603480f292bf6f4c5625cebeba47a9ea4fc564e776c656f74c5d7032ea0340de3840db8fe49ea

Download Submit
memory/3316-28-0x000001D3636A0000-0x000001D3636A8000-memory.dmp

Filesize
32KB

Download
memory/3316-32-0x000001D3636E0000-0x000001D3636E8000-memory.dmp

Filesize
32KB

Download
memory/3316-19-0x000001D344C20000-0x000001D344EFA000-memory.dmp

Filesize
2.9MB

Download
memory/3316-20-0x000001D345340000-0x000001D345350000-memory.dmp

Filesize
64KB

Download
memory/3316-21-0x000001D35F6F0000-0x000001D35F6F8000-memory.dmp

Filesize
32KB

Download
memory/3316-22-0x000001D35F720000-0x000001D35F740000-memory.dmp

Filesize
128KB

Download
memory/3316-23-0x000001D363660000-0x000001D363698000-memory.dmp

Filesize
224KB

Download
memory/3316-24-0x000001D35F710000-0x000001D35F71E000-memory.dmp

Filesize
56KB

Download
memory/3316-25-0x000001D363D20000-0x000001D363E20000-memory.dmp

Filesize
1024KB

Download
memory/3316-26-0x000001D35F770000-0x000001D35F77A000-memory.dmp

Filesize
40KB

Download
memory/3316-27-0x000001D363620000-0x000001D363648000-memory.dmp

Filesize
160KB

Download
memory/3316-40-0x000001D380050000-0x000001D380062000-memory.dmp

Filesize
72KB

Download
memory/3316-29-0x000001D3636B0000-0x000001D3636C6000-memory.dmp

Filesize
88KB

Download
memory/3316-30-0x000001D363650000-0x000001D36365A000-memory.dmp

Filesize
40KB

Download
memory/3316-31-0x000001D35F780000-0x000001D35F78A000-memory.dmp

Filesize
40KB

Download
memory/3316-39-0x000001D380160000-0x000001D380262000-memory.dmp

Filesize
1.0MB

Download
memory/3316-34-0x000001D3370E0000-0x000001D337192000-memory.dmp

Filesize
712KB

Download
memory/3316-36-0x000001D32EEF0000-0x000001D32EF0E000-memory.dmp

Filesize
120KB

Download
memory/3316-37-0x000001D363710000-0x000001D36371A000-memory.dmp

Filesize
40KB

Download
memory/3980-456-0x00000190D9130000-0x00000190D9154000-memory.dmp

Filesize
144KB

Download
memory/3980-458-0x00000190F3BD0000-0x00000190F410C000-memory.dmp

Filesize
5.2MB

Download
memory/3980-459-0x00000190F3940000-0x00000190F39FA000-memory.dmp

Filesize
744KB

Download
memory/3980-461-0x00000190F3A00000-0x00000190F3AB2000-memory.dmp

Filesize
712KB

Download
memory/3980-462-0x00000190F38B0000-0x00000190F38C4000-memory.dmp

Filesize
80KB

Download
memory/4672-16-0x00007FF9AEF60000-0x00007FF9AFA22000-memory.dmp

Filesize
10.8MB

Download
memory/4672-0-0x00007FF9AEF63000-0x00007FF9AEF65000-memory.dmp

Filesize
8KB

Download
memory/4672-5-0x000002EF30000000-0x000002EF30022000-memory.dmp

Filesize
136KB

Download
memory/4672-4-0x000002EF16280000-0x000002EF162C0000-memory.dmp

Filesize
256KB

Download
memory/4672-2-0x00007FF9AEF60000-0x00007FF9AFA22000-memory.dmp

Filesize
10.8MB

Download
memory/4672-1-0x000002EF143B0000-0x000002EF1447E000-memory.dmp

Filesize
824KB

Download