8f2e28588f2303bd8d7a9b0c3ff6a9cb16fa93f8ddc9c5e0666a8c12d6880ee3

Analysis

max time kernel
61s
max time network
66s
platform
windows11-21h2_x64
resource
win11-20241023-en
resource tags

arch:x64arch:x86image:win11-20241023-enlocale:en-usos:windows11-21h2-x64system
submitted
26-12-2024 00:14

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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
2760	BootstrapperV2.04.exe
4184	Solara.exe

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

Web Service

T1102

flow	ioc
3	pastebin.com
9	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
4820	ipconfig.exe

Modifies registry class 5 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4248760313-3670024077-2384670640-1000_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-1-5-21-4248760313-3670024077-2384670640-1000_Classes\Local Settings\MuiCache	BackgroundTransferHost.exe
Key created	\REGISTRY\USER\S-1-5-21-4248760313-3670024077-2384670640-1000_Classes\Local Settings\MuiCache	MiniSearchHost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4248760313-3670024077-2384670640-1000_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-1-5-21-4248760313-3670024077-2384670640-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoftwindows.client.cbs_cw5n1h2txyewy\Internet Settings\Cache\Cookies\CachePrefix = "Cookie:"	BackgroundTransferHost.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
4184	Solara.exe

Suspicious use of AdjustPrivilegeToken 45 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	720	WMIC.exe
Token: SeSecurityPrivilege	720	WMIC.exe
Token: SeTakeOwnershipPrivilege	720	WMIC.exe
Token: SeLoadDriverPrivilege	720	WMIC.exe
Token: SeSystemProfilePrivilege	720	WMIC.exe
Token: SeSystemtimePrivilege	720	WMIC.exe
Token: SeProfSingleProcessPrivilege	720	WMIC.exe
Token: SeIncBasePriorityPrivilege	720	WMIC.exe
Token: SeCreatePagefilePrivilege	720	WMIC.exe
Token: SeBackupPrivilege	720	WMIC.exe
Token: SeRestorePrivilege	720	WMIC.exe
Token: SeShutdownPrivilege	720	WMIC.exe
Token: SeDebugPrivilege	720	WMIC.exe
Token: SeSystemEnvironmentPrivilege	720	WMIC.exe
Token: SeRemoteShutdownPrivilege	720	WMIC.exe
Token: SeUndockPrivilege	720	WMIC.exe
Token: SeManageVolumePrivilege	720	WMIC.exe
Token: 33	720	WMIC.exe
Token: 34	720	WMIC.exe
Token: 35	720	WMIC.exe
Token: 36	720	WMIC.exe
Token: SeIncreaseQuotaPrivilege	720	WMIC.exe
Token: SeSecurityPrivilege	720	WMIC.exe
Token: SeTakeOwnershipPrivilege	720	WMIC.exe
Token: SeLoadDriverPrivilege	720	WMIC.exe
Token: SeSystemProfilePrivilege	720	WMIC.exe
Token: SeSystemtimePrivilege	720	WMIC.exe
Token: SeProfSingleProcessPrivilege	720	WMIC.exe
Token: SeIncBasePriorityPrivilege	720	WMIC.exe
Token: SeCreatePagefilePrivilege	720	WMIC.exe
Token: SeBackupPrivilege	720	WMIC.exe
Token: SeRestorePrivilege	720	WMIC.exe
Token: SeShutdownPrivilege	720	WMIC.exe
Token: SeDebugPrivilege	720	WMIC.exe
Token: SeSystemEnvironmentPrivilege	720	WMIC.exe
Token: SeRemoteShutdownPrivilege	720	WMIC.exe
Token: SeUndockPrivilege	720	WMIC.exe
Token: SeManageVolumePrivilege	720	WMIC.exe
Token: 33	720	WMIC.exe
Token: 34	720	WMIC.exe
Token: 35	720	WMIC.exe
Token: 36	720	WMIC.exe
Token: SeDebugPrivilege	2232	Bootstrapper.exe
Token: SeDebugPrivilege	2760	BootstrapperV2.04.exe
Token: SeDebugPrivilege	4184	Solara.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3156	MiniSearchHost.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2232 wrote to memory of 4828	2232	Bootstrapper.exe	78
PID 2232 wrote to memory of 4828	2232	Bootstrapper.exe	78
PID 4828 wrote to memory of 4820	4828	cmd.exe	80
PID 4828 wrote to memory of 4820	4828	cmd.exe	80
PID 2232 wrote to memory of 5036	2232	Bootstrapper.exe	81
PID 2232 wrote to memory of 5036	2232	Bootstrapper.exe	81
PID 5036 wrote to memory of 720	5036	cmd.exe	83
PID 5036 wrote to memory of 720	5036	cmd.exe	83
PID 2232 wrote to memory of 2760	2232	Bootstrapper.exe	85
PID 2232 wrote to memory of 2760	2232	Bootstrapper.exe	85
PID 2760 wrote to memory of 4184	2760	BootstrapperV2.04.exe	86
PID 2760 wrote to memory of 4184	2760	BootstrapperV2.04.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:2232
- C:\Windows\SYSTEM32\cmd.exe
  "cmd" /c ipconfig /all
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4828
- - C:\Windows\system32\ipconfig.exe
    ipconfig /all
    3⤵
    - Gathers network information
    PID:4820
- 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:5036
- - 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:720
- C:\Users\Admin\AppData\Local\Temp\BootstrapperV2.04.exe
  "C:\Users\Admin\AppData\Local\Temp\BootstrapperV2.04.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:2760
- - C:\ProgramData\Solara\Solara.exe
    "C:\ProgramData\Solara\Solara.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4184

C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe
"C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe" -ServerName:MiniSearchUI.AppXj3y73at8fy1htwztzxs68sxx1v7cksp7.mca
1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:3156

C:\Windows\system32\BackgroundTransferHost.exe
"BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.13
1⤵
- Modifies registry class
PID:804

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\4f7d4fbe-2a3f-4117-b11f-8fca1cf26380.down_data

Filesize
555KB

MD5
5683c0028832cae4ef93ca39c8ac5029

SHA1
248755e4e1db552e0b6f8651b04ca6d1b31a86fb

SHA256
855abd360d8a8d6974eba92b70cbd09ce519bc8773439993f9ab37cb6847309e

SHA512
aba434bd29be191c823b02ea9b639beb10647bbe7759bbffdaa790dfb1ec2c58d74c525ef11aacda209e4effe322d1d3a07b115446c8914b07a3bce4d8a0e2c3

Download Submit
C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\TempState\SearchHoverUnifiedTileModelCache.dat

Filesize
10KB

MD5
1301a13a0b62ba61652cdbf2d61f80fa

SHA1
1911d1f0d097e8f5275a29e17b0bcef305df1d9e

SHA256
7e75ad955706d05f5934810aebbd3b5a7742d5e5766efd9c4fc17ee492b2f716

SHA512
66aa4261628bb31ee416af70f4159c02e5bbfbe2f7645e87d70bb35b1f20fa915d62b25d99cd72c59580d1f64e6c6b5ad36ace6600d3bcdb67f45036d768ed8b

Download Submit
C:\Users\Admin\AppData\Local\Temp\BootstrapperV2.04.exe

Filesize
2.8MB

MD5
be4da425d9b7593e358ffbfca29f9c70

SHA1
dc98530aad9728d779866ae957a738c52b13a565

SHA256
c5277ddb6e51181d2b8bad59acf5f2badf5613b1e73384a84b793f720aa76c0d

SHA512
35790944f5855038f8357c0f6d11ea81b260632e590c26f9342e8beb1a8dfd2e3eb9efa11f8378f8542cad45e7675af3d29cf27424accf35aaa6aeb34487155b

Download Submit
memory/2232-0-0x000001FB0C480000-0x000001FB0C54E000-memory.dmp

Filesize
824KB

Download
memory/2232-1-0x00007FFDC7DF3000-0x00007FFDC7DF5000-memory.dmp

Filesize
8KB

Download
memory/2232-2-0x00007FFDC7DF0000-0x00007FFDC88B2000-memory.dmp

Filesize
10.8MB

Download
memory/2232-4-0x000001FB26B30000-0x000001FB26B52000-memory.dmp

Filesize
136KB

Download
memory/2232-17-0x00007FFDC7DF0000-0x00007FFDC88B2000-memory.dmp

Filesize
10.8MB

Download
memory/2760-28-0x00000252D0AD0000-0x00000252D0ADA000-memory.dmp

Filesize
40KB

Download
memory/2760-37-0x0000025300060000-0x0000025300072000-memory.dmp

Filesize
72KB

Download
memory/2760-25-0x00000252D0AA0000-0x00000252D0AC8000-memory.dmp

Filesize
160KB

Download
memory/2760-26-0x00000252D0AE0000-0x00000252D0AE8000-memory.dmp

Filesize
32KB

Download
memory/2760-27-0x00000252D11F0000-0x00000252D1206000-memory.dmp

Filesize
88KB

Download
memory/2760-23-0x00000252D10F0000-0x00000252D11F0000-memory.dmp

Filesize
1024KB

Download
memory/2760-29-0x00000252D0A50000-0x00000252D0A5A000-memory.dmp

Filesize
40KB

Download
memory/2760-30-0x00000252D1220000-0x00000252D1228000-memory.dmp

Filesize
32KB

Download
memory/2760-32-0x000002529C7A0000-0x000002529C852000-memory.dmp

Filesize
712KB

Download
memory/2760-34-0x000002528E6D0000-0x000002528E6EE000-memory.dmp

Filesize
120KB

Download
memory/2760-35-0x00000252FFFE0000-0x00000252FFFEA000-memory.dmp

Filesize
40KB

Download
memory/2760-24-0x00000252D0A40000-0x00000252D0A4A000-memory.dmp

Filesize
40KB

Download
memory/2760-22-0x00000252D0A30000-0x00000252D0A3E000-memory.dmp

Filesize
56KB

Download
memory/2760-18-0x00000252B2090000-0x00000252B236A000-memory.dmp

Filesize
2.9MB

Download
memory/2760-21-0x00000252D0A60000-0x00000252D0A98000-memory.dmp

Filesize
224KB

Download
memory/2760-19-0x00000252B4080000-0x00000252B4090000-memory.dmp

Filesize
64KB

Download
memory/2760-20-0x00000252D09E0000-0x00000252D09E8000-memory.dmp

Filesize
32KB

Download
memory/4184-456-0x0000019074210000-0x00000190742CA000-memory.dmp

Filesize
744KB

Download
memory/4184-458-0x00000190742D0000-0x0000019074382000-memory.dmp

Filesize
712KB

Download
memory/4184-455-0x0000019074750000-0x0000019074C8C000-memory.dmp

Filesize
5.2MB

Download
memory/4184-453-0x00000190599B0000-0x00000190599D4000-memory.dmp

Filesize
144KB

Download