6edfb343ed43ddd5bd2d1131acc658ad72d3128b3c7d63ea933e51aae67a0cff

Analysis

max time kernel
120s
max time network
118s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
07/09/2024, 10:39

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General

Target

27ead79e625289762f6dfae5111ebaa0N.exe
Size

5.4MB
MD5

27ead79e625289762f6dfae5111ebaa0
SHA1

15c2bc0152cf9c07eaa774d0269ed1d3bf884dd6
SHA256

6edfb343ed43ddd5bd2d1131acc658ad72d3128b3c7d63ea933e51aae67a0cff
SHA512

245f40383ac2af916063a94d230af4f318c59d9cf894d0061bc6743aeeda250c237ec743f123adf3834aee882ab7c3f135068187f808415008919950170222fa
SSDEEP

98304:+TCx1ykMv3Aiju03ej9Qfqy/mfr1e2E2IojD4jpLik:m8yBAi6zvmY5e2cogJ

Score

10^/10

discovery evasion persistence

Malware Config

Signatures

Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-1506706701-1246725540-2219210854-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1506706701-1246725540-2219210854-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe

Executes dropped EXE 7 IoCs

pid	Process
2756	27ead79e625289762f6dfae5111ebaa0n.exe
2664	svchost.exe
2940	icsys.icn.exe
1528	explorer.exe
2532	spoolsv.exe
3020	svchost.exe
860	spoolsv.exe

Loads dropped DLL 6 IoCs

pid	Process
2668	27ead79e625289762f6dfae5111ebaa0N.exe
2668	27ead79e625289762f6dfae5111ebaa0N.exe
2940	icsys.icn.exe
1528	explorer.exe
2532	spoolsv.exe
3020	svchost.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\resources\\svchost.exe RO"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Explorer = "c:\\windows\\resources\\themes\\explorer.exe RO"	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\resources\\svchost.exe RO"	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Explorer = "c:\\windows\\resources\\themes\\explorer.exe RO"	explorer.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\explorer.exe	explorer.exe
File opened for modification	C:\Windows\SysWOW64\explorer.exe	svchost.exe

Drops file in Windows directory 7 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Resources\tjud.exe	explorer.exe
File opened for modification	C:\Windows\Resources\Themes\icsys.icn.exe	27ead79e625289762f6dfae5111ebaa0N.exe
File created	C:\Windows\svchost.exe	27ead79e625289762f6dfae5111ebaa0n.exe
File opened for modification	\??\c:\windows\resources\themes\explorer.exe	icsys.icn.exe
File opened for modification	\??\c:\windows\resources\spoolsv.exe	explorer.exe
File opened for modification	\??\c:\windows\resources\svchost.exe	spoolsv.exe
File opened for modification	C:\Windows\svchost.exe	explorer.exe

System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spoolsv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spoolsv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	27ead79e625289762f6dfae5111ebaa0n.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icsys.icn.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	27ead79e625289762f6dfae5111ebaa0N.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2176	schtasks.exe
2576	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2668	27ead79e625289762f6dfae5111ebaa0N.exe
2668	27ead79e625289762f6dfae5111ebaa0N.exe
2668	27ead79e625289762f6dfae5111ebaa0N.exe
2668	27ead79e625289762f6dfae5111ebaa0N.exe
2668	27ead79e625289762f6dfae5111ebaa0N.exe
2668	27ead79e625289762f6dfae5111ebaa0N.exe
2668	27ead79e625289762f6dfae5111ebaa0N.exe
2668	27ead79e625289762f6dfae5111ebaa0N.exe
2668	27ead79e625289762f6dfae5111ebaa0N.exe
2668	27ead79e625289762f6dfae5111ebaa0N.exe
2668	27ead79e625289762f6dfae5111ebaa0N.exe
2668	27ead79e625289762f6dfae5111ebaa0N.exe
2668	27ead79e625289762f6dfae5111ebaa0N.exe
2668	27ead79e625289762f6dfae5111ebaa0N.exe
2668	27ead79e625289762f6dfae5111ebaa0N.exe
2668	27ead79e625289762f6dfae5111ebaa0N.exe
2940	icsys.icn.exe
2940	icsys.icn.exe
2940	icsys.icn.exe
2940	icsys.icn.exe
2940	icsys.icn.exe
2940	icsys.icn.exe
2940	icsys.icn.exe
2940	icsys.icn.exe
2940	icsys.icn.exe
2940	icsys.icn.exe
2940	icsys.icn.exe
2940	icsys.icn.exe
2940	icsys.icn.exe
2940	icsys.icn.exe
2940	icsys.icn.exe
2940	icsys.icn.exe
2940	icsys.icn.exe
1528	explorer.exe
1528	explorer.exe
1528	explorer.exe
1528	explorer.exe
1528	explorer.exe
1528	explorer.exe
1528	explorer.exe
1528	explorer.exe
1528	explorer.exe
1528	explorer.exe
1528	explorer.exe
1528	explorer.exe
1528	explorer.exe
1528	explorer.exe
1528	explorer.exe
1528	explorer.exe
3020	svchost.exe
3020	svchost.exe
3020	svchost.exe
3020	svchost.exe
3020	svchost.exe
3020	svchost.exe
3020	svchost.exe
3020	svchost.exe
3020	svchost.exe
3020	svchost.exe
3020	svchost.exe
3020	svchost.exe
3020	svchost.exe
3020	svchost.exe
3020	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
1528	explorer.exe
3020	svchost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2940	icsys.icn.exe
Token: SeDebugPrivilege	2940	icsys.icn.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2668	27ead79e625289762f6dfae5111ebaa0N.exe
2668	27ead79e625289762f6dfae5111ebaa0N.exe
2940	icsys.icn.exe
2940	icsys.icn.exe
1528	explorer.exe
1528	explorer.exe
2532	spoolsv.exe
2532	spoolsv.exe
3020	svchost.exe
3020	svchost.exe
860	spoolsv.exe
860	spoolsv.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 2668 wrote to memory of 2756	2668	27ead79e625289762f6dfae5111ebaa0N.exe	30
PID 2668 wrote to memory of 2756	2668	27ead79e625289762f6dfae5111ebaa0N.exe	30
PID 2668 wrote to memory of 2756	2668	27ead79e625289762f6dfae5111ebaa0N.exe	30
PID 2668 wrote to memory of 2756	2668	27ead79e625289762f6dfae5111ebaa0N.exe	30
PID 2756 wrote to memory of 2664	2756	27ead79e625289762f6dfae5111ebaa0n.exe	31
PID 2756 wrote to memory of 2664	2756	27ead79e625289762f6dfae5111ebaa0n.exe	31
PID 2756 wrote to memory of 2664	2756	27ead79e625289762f6dfae5111ebaa0n.exe	31
PID 2756 wrote to memory of 2664	2756	27ead79e625289762f6dfae5111ebaa0n.exe	31
PID 2668 wrote to memory of 2940	2668	27ead79e625289762f6dfae5111ebaa0N.exe	32
PID 2668 wrote to memory of 2940	2668	27ead79e625289762f6dfae5111ebaa0N.exe	32
PID 2668 wrote to memory of 2940	2668	27ead79e625289762f6dfae5111ebaa0N.exe	32
PID 2668 wrote to memory of 2940	2668	27ead79e625289762f6dfae5111ebaa0N.exe	32
PID 2940 wrote to memory of 1528	2940	icsys.icn.exe	33
PID 2940 wrote to memory of 1528	2940	icsys.icn.exe	33
PID 2940 wrote to memory of 1528	2940	icsys.icn.exe	33
PID 2940 wrote to memory of 1528	2940	icsys.icn.exe	33
PID 1528 wrote to memory of 2532	1528	explorer.exe	34
PID 1528 wrote to memory of 2532	1528	explorer.exe	34
PID 1528 wrote to memory of 2532	1528	explorer.exe	34
PID 1528 wrote to memory of 2532	1528	explorer.exe	34
PID 2532 wrote to memory of 3020	2532	spoolsv.exe	35
PID 2532 wrote to memory of 3020	2532	spoolsv.exe	35
PID 2532 wrote to memory of 3020	2532	spoolsv.exe	35
PID 2532 wrote to memory of 3020	2532	spoolsv.exe	35
PID 3020 wrote to memory of 860	3020	svchost.exe	36
PID 3020 wrote to memory of 860	3020	svchost.exe	36
PID 3020 wrote to memory of 860	3020	svchost.exe	36
PID 3020 wrote to memory of 860	3020	svchost.exe	36
PID 1528 wrote to memory of 2716	1528	explorer.exe	37
PID 1528 wrote to memory of 2716	1528	explorer.exe	37
PID 1528 wrote to memory of 2716	1528	explorer.exe	37
PID 1528 wrote to memory of 2716	1528	explorer.exe	37
PID 3020 wrote to memory of 2576	3020	svchost.exe	38
PID 3020 wrote to memory of 2576	3020	svchost.exe	38
PID 3020 wrote to memory of 2576	3020	svchost.exe	38
PID 3020 wrote to memory of 2576	3020	svchost.exe	38
PID 3020 wrote to memory of 2176	3020	svchost.exe	41
PID 3020 wrote to memory of 2176	3020	svchost.exe	41
PID 3020 wrote to memory of 2176	3020	svchost.exe	41
PID 3020 wrote to memory of 2176	3020	svchost.exe	41

C:\Users\Admin\AppData\Local\Temp\27ead79e625289762f6dfae5111ebaa0N.exe
"C:\Users\Admin\AppData\Local\Temp\27ead79e625289762f6dfae5111ebaa0N.exe"
1⤵
- Loads dropped DLL
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2668
- \??\c:\users\admin\appdata\local\temp\27ead79e625289762f6dfae5111ebaa0n.exe
  c:\users\admin\appdata\local\temp\27ead79e625289762f6dfae5111ebaa0n.exe
  2⤵
  - Executes dropped EXE
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2756
- - C:\Windows\svchost.exe
    "C:\Windows\svchost.exe" "c:\users\admin\appdata\local\temp\27ead79e625289762f6dfae5111ebaa0n.exe "
    3⤵
    - Executes dropped EXE
    PID:2664
- C:\Windows\Resources\Themes\icsys.icn.exe
  C:\Windows\Resources\Themes\icsys.icn.exe
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2940
- - \??\c:\windows\resources\themes\explorer.exe
    c:\windows\resources\themes\explorer.exe
    3⤵
    - Modifies visiblity of hidden/system files in Explorer
    - Executes dropped EXE
    - Loads dropped DLL
    - Adds Run key to start application
    - Drops file in System32 directory
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1528
  - - \??\c:\windows\resources\spoolsv.exe
      c:\windows\resources\spoolsv.exe SE
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Drops file in Windows directory
      System Location Discovery: System Language Discovery
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:2532
    - - \??\c:\windows\resources\svchost.exe
        
        c:\windows\resources\svchost.exe
        5⤵
        Modifies visiblity of hidden/system files in Explorer
        Executes dropped EXE
        Loads dropped DLL
        Adds Run key to start application
        Drops file in System32 directory
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious behavior: GetForegroundWindowSpam
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:3020
      - \??\c:\windows\resources\spoolsv.exe
        
        c:\windows\resources\spoolsv.exe PR
        6⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:860
      - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 10:41 /f
        6⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:2576
      - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 10:42 /f
        6⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:2176
  - - C:\Windows\Explorer.exe
      C:\Windows\Explorer.exe
      4⤵
      PID:2716

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\Resources\Themes\explorer.exe

Filesize
135KB

MD5
a424f1c1d48e8e87bf6149721c8bdf4f

SHA1
6b1669203b163745c274ead77664861d1b4cdf83

SHA256
a87c20cb305c37802fa66c77d31997b9bc0befe28761f88308f116d9cd44d3f7

SHA512
bcfec8dbe885905303164e2bb891a8024a6c45d128f8fdb7efeb1eea7140ff498b9312243b94c09f38ad91c88d4a9c59c097bfc6f13288f88847957a62612a81

Download Submit
C:\Windows\svchost.exe

Filesize
35KB

MD5
9e3c13b6556d5636b745d3e466d47467

SHA1
2ac1c19e268c49bc508f83fe3d20f495deb3e538

SHA256
20af03add533a6870d524a7c4753b42bfceb56cddd46016c051e23581ba743f8

SHA512
5a07ba8a7fcb15f64b129fada2621252b8bc37eb34d4f614c075c064f8ac0d367301eba0c32c5e28b8aa633f6ab604f0dfcc363b34734ce0207ef0d4e8817c4b

Download Submit
\Users\Admin\AppData\Local\Temp\27ead79e625289762f6dfae5111ebaa0n.exe

Filesize
5.2MB

MD5
d24dd522c60656df91356571ff05e616

SHA1
e5e0d1fbc85c5424accbf7a9bd1fe0e1f6c92b18

SHA256
a1c2b70bf3ad91f7b79ac3231f7cbad34cf80f40f950de0596de736036806f9d

SHA512
62d03b699923e87027d0429f59b38f5cf5636fc21b9a41ff1be2d7549e66c4cfd8a5ca377cbef1d390b75477e5ba697843e6e9ae121054dda5496ed21f93efd1

Download Submit
\Windows\Resources\Themes\icsys.icn.exe

Filesize
135KB

MD5
81431e8c7a9cf24c1e41751bfba32ad9

SHA1
96d029ad4731cbbf137e3ecaf1000ff176e3589e

SHA256
896f497d5a1f5fcbfa0a4677704c8084f5882072391220bd1bda04abcd37310e

SHA512
d7c41cd7284fb4c311a6bb7876788e8c6bccd964355eb3c9309c1c83029ab013e73c7ad089eecdbe3c4a1e0eaef90b950fce4dc19c6811ed8d444f453a29b2f5

Download Submit
\Windows\Resources\spoolsv.exe

Filesize
135KB

MD5
67d2a55ae085b1958abd318b70a9bb62

SHA1
d8d24b0938e692a444ffbf1652bc79d0fdb402de

SHA256
5554149495666e522a4c0c68368284ba3a9ad832692383ee42a5625b73fa0d0e

SHA512
2b7b53bce6d28d5eb759a199d8e15b81d5f6646a8f4352821572d0f48a15f81c3a80e7db8a8521fe057c4d970083e57b59ab0e521b2e3f11e7483f488d64d9a9

Download Submit
\Windows\Resources\svchost.exe

Filesize
135KB

MD5
47d8ed085c6e383abede0b55b55816eb

SHA1
8868df990efb4066553560f54e08f5d48e51f8ec

SHA256
e2c6dc804bc875524c57889d6aaad4cfdda066971f63bc70a77b660a7d79bce8

SHA512
a49535291461c3474bb1e62b89f50a7ae41488884cd3a05d70b154b4171511b6cacc7501297f886b41f9b282a361f0aa8bf722f6a47508a2a234b91964871365

Download Submit
memory/860-66-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1528-70-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2532-67-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2532-49-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2664-28-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download
memory/2668-21-0x0000000000510000-0x000000000052F000-memory.dmp

Filesize
124KB

Download
memory/2668-69-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2668-0-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2756-16-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2940-33-0x00000000003E0000-0x00000000003FF000-memory.dmp

Filesize
124KB

Download
memory/2940-68-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3020-71-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3020-72-0x0000000000280000-0x000000000029F000-memory.dmp

Filesize
124KB

Download