30d17c665801b2bc713301552d45bad970be0e0ca90f09769a6ad385128ff12d

Analysis

max time kernel
151s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
10-03-2024 23:47

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General

Target

bf46c0f10ddd3a16518cdd366c48830b.exe
Size

344KB
MD5

bf46c0f10ddd3a16518cdd366c48830b
SHA1

1e5a63266a0fcfdcad8517e439f109977fbba0bc
SHA256

30d17c665801b2bc713301552d45bad970be0e0ca90f09769a6ad385128ff12d
SHA512

f35487040480142cbdb6be99b099471655d5f629c908607aaa988aecb99803b4a4119f5c4ab1c9754379cd372e355a91e202022590e9b677ceec3b9f7341e6a7
SSDEEP

6144:9Hxi2fmOCRXHK4Ms/sjZfHyVZbGMGRC6xs/uZJkBYkRdTZCYGkoS:bJskj5SVoLRCBuEWkRdTEYGkoS

Score

10^/10

evasion persistence upx

Malware Config

Signatures

Modifies firewall policy service 2 TTPs 12 IoCs

evasion

Modify Registry

T1112

Windows Service

T1543.003

description	ioc	Process
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	reg.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	reg.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	reg.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications	reg.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	reg.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DoNotAllowExceptions = "0"	reg.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DoNotAllowExceptions = "0"	reg.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List	reg.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List	reg.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications	reg.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\C:\Users\Admin\AppData\Roaming\SmallerDARK.exe = "C:\\Users\\Admin\\AppData\\Roaming\\SmallerDARK.exe:*:Enabled:Windows Messanger"	reg.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\C:\Users\Admin\AppData\Roaming\%NON%\small.exe = "C:\\Users\\Admin\\AppData\\Roaming\\%NON%\\small.exe:*:Enabled:Windows Messanger"	reg.exe

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	bf46c0f10ddd3a16518cdd366c48830b.exe

Executes dropped EXE 3 IoCs

pid	Process
4020	small.exe
3964	small.exe
4596	small.exe

UPX packed file 21 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3316-0-0x0000000000400000-0x0000000000777000-memory.dmp	upx
behavioral2/memory/3316-4-0x0000000000400000-0x0000000000777000-memory.dmp	upx
behavioral2/files/0x000a00000002327d-12.dat	upx
behavioral2/files/0x000a00000002327d-18.dat	upx
behavioral2/files/0x000a00000002327d-17.dat	upx
behavioral2/memory/3316-25-0x0000000000400000-0x0000000000777000-memory.dmp	upx
behavioral2/memory/4596-23-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/3964-21-0x0000000000400000-0x0000000000473000-memory.dmp	upx
behavioral2/memory/3964-30-0x0000000000400000-0x0000000000473000-memory.dmp	upx
behavioral2/memory/3964-33-0x0000000000400000-0x0000000000473000-memory.dmp	upx
behavioral2/memory/4596-35-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/4020-36-0x0000000000400000-0x0000000000777000-memory.dmp	upx
behavioral2/memory/4596-32-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/3964-44-0x0000000000400000-0x0000000000473000-memory.dmp	upx
behavioral2/memory/4596-45-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/3964-46-0x0000000000400000-0x0000000000473000-memory.dmp	upx
behavioral2/memory/3964-49-0x0000000000400000-0x0000000000473000-memory.dmp	upx
behavioral2/memory/3964-51-0x0000000000400000-0x0000000000473000-memory.dmp	upx
behavioral2/memory/3964-55-0x0000000000400000-0x0000000000473000-memory.dmp	upx
behavioral2/memory/3964-58-0x0000000000400000-0x0000000000473000-memory.dmp	upx
behavioral2/memory/3964-60-0x0000000000400000-0x0000000000473000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\mrecss = "C:\\Users\\Admin\\AppData\\Roaming\\\\small.exe"	reg.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4020 set thread context of 3964	4020	small.exe	105
PID 4020 set thread context of 4596	4020	small.exe	106

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

System Information Discovery
T1082

Modifies registry key 1 TTPs 4 IoCs

Modify Registry

T1112

pid	Process
4040	reg.exe
1832	reg.exe
2712	reg.exe
5104	reg.exe

Suspicious use of AdjustPrivilegeToken 36 IoCs

description	pid	Process
Token: SeDebugPrivilege	4596	small.exe
Token: 1	3964	small.exe
Token: SeCreateTokenPrivilege	3964	small.exe
Token: SeAssignPrimaryTokenPrivilege	3964	small.exe
Token: SeLockMemoryPrivilege	3964	small.exe
Token: SeIncreaseQuotaPrivilege	3964	small.exe
Token: SeMachineAccountPrivilege	3964	small.exe
Token: SeTcbPrivilege	3964	small.exe
Token: SeSecurityPrivilege	3964	small.exe
Token: SeTakeOwnershipPrivilege	3964	small.exe
Token: SeLoadDriverPrivilege	3964	small.exe
Token: SeSystemProfilePrivilege	3964	small.exe
Token: SeSystemtimePrivilege	3964	small.exe
Token: SeProfSingleProcessPrivilege	3964	small.exe
Token: SeIncBasePriorityPrivilege	3964	small.exe
Token: SeCreatePagefilePrivilege	3964	small.exe
Token: SeCreatePermanentPrivilege	3964	small.exe
Token: SeBackupPrivilege	3964	small.exe
Token: SeRestorePrivilege	3964	small.exe
Token: SeShutdownPrivilege	3964	small.exe
Token: SeDebugPrivilege	3964	small.exe
Token: SeAuditPrivilege	3964	small.exe
Token: SeSystemEnvironmentPrivilege	3964	small.exe
Token: SeChangeNotifyPrivilege	3964	small.exe
Token: SeRemoteShutdownPrivilege	3964	small.exe
Token: SeUndockPrivilege	3964	small.exe
Token: SeSyncAgentPrivilege	3964	small.exe
Token: SeEnableDelegationPrivilege	3964	small.exe
Token: SeManageVolumePrivilege	3964	small.exe
Token: SeImpersonatePrivilege	3964	small.exe
Token: SeCreateGlobalPrivilege	3964	small.exe
Token: 31	3964	small.exe
Token: 32	3964	small.exe
Token: 33	3964	small.exe
Token: 34	3964	small.exe
Token: 35	3964	small.exe

Suspicious use of SetWindowsHookEx 6 IoCs

pid	Process
3316	bf46c0f10ddd3a16518cdd366c48830b.exe
4020	small.exe
3964	small.exe
4596	small.exe
3964	small.exe
3964	small.exe

Suspicious use of WriteProcessMemory 49 IoCs

description	pid	Process	procid_target
PID 3316 wrote to memory of 2128	3316	bf46c0f10ddd3a16518cdd366c48830b.exe	100
PID 3316 wrote to memory of 2128	3316	bf46c0f10ddd3a16518cdd366c48830b.exe	100
PID 3316 wrote to memory of 2128	3316	bf46c0f10ddd3a16518cdd366c48830b.exe	100
PID 2128 wrote to memory of 3100	2128	cmd.exe	103
PID 2128 wrote to memory of 3100	2128	cmd.exe	103
PID 2128 wrote to memory of 3100	2128	cmd.exe	103
PID 3316 wrote to memory of 4020	3316	bf46c0f10ddd3a16518cdd366c48830b.exe	104
PID 3316 wrote to memory of 4020	3316	bf46c0f10ddd3a16518cdd366c48830b.exe	104
PID 3316 wrote to memory of 4020	3316	bf46c0f10ddd3a16518cdd366c48830b.exe	104
PID 4020 wrote to memory of 3964	4020	small.exe	105
PID 4020 wrote to memory of 3964	4020	small.exe	105
PID 4020 wrote to memory of 3964	4020	small.exe	105
PID 4020 wrote to memory of 3964	4020	small.exe	105
PID 4020 wrote to memory of 3964	4020	small.exe	105
PID 4020 wrote to memory of 3964	4020	small.exe	105
PID 4020 wrote to memory of 3964	4020	small.exe	105
PID 4020 wrote to memory of 3964	4020	small.exe	105
PID 4020 wrote to memory of 4596	4020	small.exe	106
PID 4020 wrote to memory of 4596	4020	small.exe	106
PID 4020 wrote to memory of 4596	4020	small.exe	106
PID 4020 wrote to memory of 4596	4020	small.exe	106
PID 4020 wrote to memory of 4596	4020	small.exe	106
PID 4020 wrote to memory of 4596	4020	small.exe	106
PID 4020 wrote to memory of 4596	4020	small.exe	106
PID 4020 wrote to memory of 4596	4020	small.exe	106
PID 3964 wrote to memory of 4336	3964	small.exe	107
PID 3964 wrote to memory of 4336	3964	small.exe	107
PID 3964 wrote to memory of 4336	3964	small.exe	107
PID 3964 wrote to memory of 3232	3964	small.exe	108
PID 3964 wrote to memory of 3232	3964	small.exe	108
PID 3964 wrote to memory of 3232	3964	small.exe	108
PID 3964 wrote to memory of 3684	3964	small.exe	110
PID 3964 wrote to memory of 3684	3964	small.exe	110
PID 3964 wrote to memory of 3684	3964	small.exe	110
PID 3964 wrote to memory of 3632	3964	small.exe	112
PID 3964 wrote to memory of 3632	3964	small.exe	112
PID 3964 wrote to memory of 3632	3964	small.exe	112
PID 3684 wrote to memory of 1832	3684	cmd.exe	115
PID 3684 wrote to memory of 1832	3684	cmd.exe	115
PID 3684 wrote to memory of 1832	3684	cmd.exe	115
PID 3232 wrote to memory of 2712	3232	cmd.exe	116
PID 3232 wrote to memory of 2712	3232	cmd.exe	116
PID 3232 wrote to memory of 2712	3232	cmd.exe	116
PID 4336 wrote to memory of 5104	4336	cmd.exe	117
PID 4336 wrote to memory of 5104	4336	cmd.exe	117
PID 4336 wrote to memory of 5104	4336	cmd.exe	117
PID 3632 wrote to memory of 4040	3632	cmd.exe	118
PID 3632 wrote to memory of 4040	3632	cmd.exe	118
PID 3632 wrote to memory of 4040	3632	cmd.exe	118

C:\Users\Admin\AppData\Local\Temp\bf46c0f10ddd3a16518cdd366c48830b.exe
"C:\Users\Admin\AppData\Local\Temp\bf46c0f10ddd3a16518cdd366c48830b.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3316
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\xKhJZ.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2128
- - C:\Windows\SysWOW64\reg.exe
    REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "mrecss" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\\small.exe" /f
    3⤵
    - Adds Run key to start application
    PID:3100
- C:\Users\Admin\AppData\Roaming\%NON%\small.exe
  "C:\Users\Admin\AppData\Roaming\%NON%\small.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4020
- - C:\Users\Admin\AppData\Roaming\%NON%\small.exe
    False
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3964
  - - C:\Windows\SysWOW64\cmd.exe
      cmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4336
    - - C:\Windows\SysWOW64\reg.exe
        
        REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
        5⤵
        Modifies firewall policy service
        Modifies registry key
        
        PID:5104
  - - C:\Windows\SysWOW64\cmd.exe
      cmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Roaming\%NON%\small.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\%NON%\small.exe:*:Enabled:Windows Messanger" /f
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3232
    - - C:\Windows\SysWOW64\reg.exe
        
        REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Roaming\%NON%\small.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\%NON%\small.exe:*:Enabled:Windows Messanger" /f
        5⤵
        Modifies firewall policy service
        Modifies registry key
        
        PID:2712
  - - C:\Windows\SysWOW64\cmd.exe
      cmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3684
    - - C:\Windows\SysWOW64\reg.exe
        
        REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
        5⤵
        Modifies firewall policy service
        Modifies registry key
        
        PID:1832
  - - C:\Windows\SysWOW64\cmd.exe
      cmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Roaming\SmallerDARK.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\SmallerDARK.exe:*:Enabled:Windows Messanger" /f
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3632
    - - C:\Windows\SysWOW64\reg.exe
        
        REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Roaming\SmallerDARK.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\SmallerDARK.exe:*:Enabled:Windows Messanger" /f
        5⤵
        Modifies firewall policy service
        Modifies registry key
        
        PID:4040
- - C:\Users\Admin\AppData\Roaming\%NON%\small.exe
    False
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:4596

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3756 --field-trial-handle=2248,i,10247514684337323751,15511974759131734137,262144 --variations-seed-version /prefetch:8
1⤵
PID:5080

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\xKhJZ.bat

Filesize
137B

MD5
b60a6d7bd543c2827d9ed1979606fcd6

SHA1
de48b503245a05dff5f67e3035e2f512dea8aaf1

SHA256
82ab509a50b5e03deee267ec940ea65c3588d54baf2986d08a90cd1a5f98dd71

SHA512
c8d654632362862f1a8484c4e7fbc779c73f2f9cd554ee890326865c81eea89142df743a573c00ed08e8a37190871d1c1f33d31e8721f10a036246e2e0113cd0

Download Submit
C:\Users\Admin\AppData\Roaming\%NON%\small.exe

Filesize
304KB

MD5
6edf0dad38ee583547a21f9829fb755d

SHA1
76e940f3b4019f9ae64311eb62b6a4c73ecb6d74

SHA256
e70c517fcc569b831ba1e904ef7f80392ab22db42185425fc0d8913d6e604b2c

SHA512
03d338a260d0752bf8d275715036e14b2caf43d06f710a7ad75081b1a858faf531ec427811997339e4b551c523dab870da04ea7277d195bba4135d2ffc81012e

Download Submit
C:\Users\Admin\AppData\Roaming\%NON%\small.exe

Filesize
344KB

MD5
bf46c0f10ddd3a16518cdd366c48830b

SHA1
1e5a63266a0fcfdcad8517e439f109977fbba0bc

SHA256
30d17c665801b2bc713301552d45bad970be0e0ca90f09769a6ad385128ff12d

SHA512
f35487040480142cbdb6be99b099471655d5f629c908607aaa988aecb99803b4a4119f5c4ab1c9754379cd372e355a91e202022590e9b677ceec3b9f7341e6a7

Download Submit
C:\Users\Admin\AppData\Roaming\%NON%\small.exe

Filesize
263KB

MD5
3b06b5f5cdfe306e70184c6dde901c1a

SHA1
c09a1d0a99c30560a8c58b7edad1b3913bb28dbb

SHA256
f997c4f8af89372dc15f7eaeddead1d66805f82d263b099f0aea08bb66c90454

SHA512
d2051d44a42a969794a39481f8dbbfac4b4ae8625ef9c0245edb58f5104d0890ac14fbdb48a633ca62e5c83388b76219a023ec43aaebdd86c14e774b54d601f3

Download Submit
memory/3316-0-0x0000000000400000-0x0000000000777000-memory.dmp

Filesize
3.5MB

Download
memory/3316-4-0x0000000000400000-0x0000000000777000-memory.dmp

Filesize
3.5MB

Download
memory/3316-25-0x0000000000400000-0x0000000000777000-memory.dmp

Filesize
3.5MB

Download
memory/3964-33-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/3964-49-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/3964-30-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/3964-60-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/3964-58-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/3964-55-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/3964-51-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/3964-44-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/3964-21-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/3964-46-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/4020-36-0x0000000000400000-0x0000000000777000-memory.dmp

Filesize
3.5MB

Download
memory/4596-45-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/4596-32-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/4596-35-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/4596-23-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads