ac0edd92f30b6a374e9f59b6f5c3e82f2684def5938de70569cb81c4efd6571e

Analysis

max time kernel
148s
max time network
150s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
06/11/2024, 02:09

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General

Target

ac0edd92f30b6a374e9f59b6f5c3e82f2684def5938de70569cb81c4efd6571e.exe
Size

284KB
MD5

09f995ad2c1bf8aa7934744ff2035594
SHA1

4106f6ef3ce2a6f609c5c17cd1d9b2f36d76594b
SHA256

ac0edd92f30b6a374e9f59b6f5c3e82f2684def5938de70569cb81c4efd6571e
SHA512

5653802d21e52221cfccf529ab553f4d6c3ac204856b5f19ee6e7971bb0bc480e21be671f8f95412e351981d23c7871da0a82bd1f1454166d07f7e85dfb463ce
SSDEEP

3072:rSQ0EWVwZhKxC5Rt+k60Zh+qw6PYSsszfHZTZJ2lC:rPA6wxmuJspr2l

Score

8^/10

discovery persistence upx

Malware Config

Signatures

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\29646 = "C:\\PROGRA~3\\LOCALS~1\\Temp\\msktevyb.scr"	svchost.exe

Executes dropped EXE 3 IoCs

pid	Process
21348	skyrpe.exe
45988	skyrpe.exe
46048	skyrpe.exe

Loads dropped DLL 5 IoCs

pid	Process
6508	ac0edd92f30b6a374e9f59b6f5c3e82f2684def5938de70569cb81c4efd6571e.exe
6508	ac0edd92f30b6a374e9f59b6f5c3e82f2684def5938de70569cb81c4efd6571e.exe
6508	ac0edd92f30b6a374e9f59b6f5c3e82f2684def5938de70569cb81c4efd6571e.exe
6508	ac0edd92f30b6a374e9f59b6f5c3e82f2684def5938de70569cb81c4efd6571e.exe
6508	ac0edd92f30b6a374e9f59b6f5c3e82f2684def5938de70569cb81c4efd6571e.exe

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-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Run\Skype = "C:\\Users\\Admin\\AppData\\Roaming\\skype\\skyrpe.exe"	reg.exe

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\disk\enum	skyrpe.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	skyrpe.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2756 set thread context of 6508	2756	ac0edd92f30b6a374e9f59b6f5c3e82f2684def5938de70569cb81c4efd6571e.exe	30
PID 21348 set thread context of 45988	21348	skyrpe.exe	35
PID 21348 set thread context of 46048	21348	skyrpe.exe	36

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral1/memory/6508-53489-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/6508-53488-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/6508-53487-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/6508-53486-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/6508-53483-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/6508-53481-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/6508-53680-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/45988-106962-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/6508-106969-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/45988-106981-0x0000000000400000-0x000000000040B000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\PROGRA~3\LOCALS~1\Temp\msktevyb.scr	svchost.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 8 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	skyrpe.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ac0edd92f30b6a374e9f59b6f5c3e82f2684def5938de70569cb81c4efd6571e.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ac0edd92f30b6a374e9f59b6f5c3e82f2684def5938de70569cb81c4efd6571e.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	skyrpe.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	skyrpe.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
46048	skyrpe.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
46048	skyrpe.exe

Suspicious use of AdjustPrivilegeToken 45 IoCs

description	pid	Process
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe
Token: SeDebugPrivilege	45988	skyrpe.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
2756	ac0edd92f30b6a374e9f59b6f5c3e82f2684def5938de70569cb81c4efd6571e.exe
6508	ac0edd92f30b6a374e9f59b6f5c3e82f2684def5938de70569cb81c4efd6571e.exe
21348	skyrpe.exe
45988	skyrpe.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2756 wrote to memory of 6508	2756	ac0edd92f30b6a374e9f59b6f5c3e82f2684def5938de70569cb81c4efd6571e.exe	30
PID 2756 wrote to memory of 6508	2756	ac0edd92f30b6a374e9f59b6f5c3e82f2684def5938de70569cb81c4efd6571e.exe	30
PID 2756 wrote to memory of 6508	2756	ac0edd92f30b6a374e9f59b6f5c3e82f2684def5938de70569cb81c4efd6571e.exe	30
PID 2756 wrote to memory of 6508	2756	ac0edd92f30b6a374e9f59b6f5c3e82f2684def5938de70569cb81c4efd6571e.exe	30
PID 2756 wrote to memory of 6508	2756	ac0edd92f30b6a374e9f59b6f5c3e82f2684def5938de70569cb81c4efd6571e.exe	30
PID 2756 wrote to memory of 6508	2756	ac0edd92f30b6a374e9f59b6f5c3e82f2684def5938de70569cb81c4efd6571e.exe	30
PID 2756 wrote to memory of 6508	2756	ac0edd92f30b6a374e9f59b6f5c3e82f2684def5938de70569cb81c4efd6571e.exe	30
PID 2756 wrote to memory of 6508	2756	ac0edd92f30b6a374e9f59b6f5c3e82f2684def5938de70569cb81c4efd6571e.exe	30
PID 6508 wrote to memory of 21428	6508	ac0edd92f30b6a374e9f59b6f5c3e82f2684def5938de70569cb81c4efd6571e.exe	31
PID 6508 wrote to memory of 21428	6508	ac0edd92f30b6a374e9f59b6f5c3e82f2684def5938de70569cb81c4efd6571e.exe	31
PID 6508 wrote to memory of 21428	6508	ac0edd92f30b6a374e9f59b6f5c3e82f2684def5938de70569cb81c4efd6571e.exe	31
PID 6508 wrote to memory of 21428	6508	ac0edd92f30b6a374e9f59b6f5c3e82f2684def5938de70569cb81c4efd6571e.exe	31
PID 21428 wrote to memory of 21376	21428	cmd.exe	33
PID 21428 wrote to memory of 21376	21428	cmd.exe	33
PID 21428 wrote to memory of 21376	21428	cmd.exe	33
PID 21428 wrote to memory of 21376	21428	cmd.exe	33
PID 6508 wrote to memory of 21348	6508	ac0edd92f30b6a374e9f59b6f5c3e82f2684def5938de70569cb81c4efd6571e.exe	34
PID 6508 wrote to memory of 21348	6508	ac0edd92f30b6a374e9f59b6f5c3e82f2684def5938de70569cb81c4efd6571e.exe	34
PID 6508 wrote to memory of 21348	6508	ac0edd92f30b6a374e9f59b6f5c3e82f2684def5938de70569cb81c4efd6571e.exe	34
PID 6508 wrote to memory of 21348	6508	ac0edd92f30b6a374e9f59b6f5c3e82f2684def5938de70569cb81c4efd6571e.exe	34
PID 21348 wrote to memory of 45988	21348	skyrpe.exe	35
PID 21348 wrote to memory of 45988	21348	skyrpe.exe	35
PID 21348 wrote to memory of 45988	21348	skyrpe.exe	35
PID 21348 wrote to memory of 45988	21348	skyrpe.exe	35
PID 21348 wrote to memory of 45988	21348	skyrpe.exe	35
PID 21348 wrote to memory of 45988	21348	skyrpe.exe	35
PID 21348 wrote to memory of 45988	21348	skyrpe.exe	35
PID 21348 wrote to memory of 45988	21348	skyrpe.exe	35
PID 21348 wrote to memory of 46048	21348	skyrpe.exe	36
PID 21348 wrote to memory of 46048	21348	skyrpe.exe	36
PID 21348 wrote to memory of 46048	21348	skyrpe.exe	36
PID 21348 wrote to memory of 46048	21348	skyrpe.exe	36
PID 21348 wrote to memory of 46048	21348	skyrpe.exe	36
PID 21348 wrote to memory of 46048	21348	skyrpe.exe	36
PID 21348 wrote to memory of 46048	21348	skyrpe.exe	36
PID 46048 wrote to memory of 46128	46048	skyrpe.exe	37
PID 46048 wrote to memory of 46128	46048	skyrpe.exe	37
PID 46048 wrote to memory of 46128	46048	skyrpe.exe	37
PID 46048 wrote to memory of 46128	46048	skyrpe.exe	37

C:\Users\Admin\AppData\Local\Temp\ac0edd92f30b6a374e9f59b6f5c3e82f2684def5938de70569cb81c4efd6571e.exe
"C:\Users\Admin\AppData\Local\Temp\ac0edd92f30b6a374e9f59b6f5c3e82f2684def5938de70569cb81c4efd6571e.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2756
- C:\Users\Admin\AppData\Local\Temp\ac0edd92f30b6a374e9f59b6f5c3e82f2684def5938de70569cb81c4efd6571e.exe
  "C:\Users\Admin\AppData\Local\Temp\ac0edd92f30b6a374e9f59b6f5c3e82f2684def5938de70569cb81c4efd6571e.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:6508
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\JRJSP.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:21428
  - - C:\Windows\SysWOW64\reg.exe
      REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "Skype" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\skype\skyrpe.exe" /f
      4⤵
      Adds Run key to start application
      System Location Discovery: System Language Discovery
      PID:21376
- - C:\Users\Admin\AppData\Roaming\skype\skyrpe.exe
    "C:\Users\Admin\AppData\Roaming\skype\skyrpe.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:21348
  - - C:\Users\Admin\AppData\Roaming\skype\skyrpe.exe
      "C:\Users\Admin\AppData\Roaming\skype\skyrpe.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      PID:45988
  - - C:\Users\Admin\AppData\Roaming\skype\skyrpe.exe
      "C:\Users\Admin\AppData\Roaming\skype\skyrpe.exe"
      4⤵
      Executes dropped EXE
      Maps connected drives based on registry
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of WriteProcessMemory
      PID:46048
    - - C:\Windows\syswow64\svchost.exe
        
        C:\Windows\syswow64\svchost.exe
        5⤵
        Adds policy Run key to start application
        Drops file in Program Files directory
        System Location Discovery: System Language Discovery
        
        PID:46128

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

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

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:\Users\Admin\AppData\Local\Temp\JRJSP.bat

Filesize
139B

MD5
0654f004b2e314bad7f75867e91da37d

SHA1
4232c22e7340b12108d86e3cb35ed288a3dbc7f1

SHA256
ead325a060300a9606a3f0f14694be39a3e4006a60c6c3eb0bea5d6f98192249

SHA512
dda135cdfca90a742d42b4c7a5e7f5df6580ec428302a8f0c311f5b92eb08dda75774e0c7497110faffbe2dfa02b30d2dfe35ec2848a275f53be8d930c7aa553

Download Submit
\Users\Admin\AppData\Roaming\skype\skyrpe.exe

Filesize
284KB

MD5
d0a6a857beada7105c34724a94615745

SHA1
fa4c7bc58f7a6a938d8d0923bc19a2af7f51445b

SHA256
de5762de1b7d8e8f6714d49bdc1a071ece922850ab63d6fe68f34b743663667b

SHA512
da7b4a0aaf19daa8656d3906752f31f52b3113b8e088dcf953a47a78ec9b63287a30f2a0032edc400ba49ad337a27e953a89bcacb43259ddcf4fb3f225d4adbf

Download Submit
memory/2756-2-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

Download
memory/6508-53479-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/6508-53489-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/6508-53485-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/6508-53483-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/6508-53481-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/6508-53487-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/6508-53488-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/6508-53486-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/6508-53680-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/6508-106969-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/45988-106962-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/45988-106981-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/46048-106966-0x0000000000400000-0x0000000000405000-memory.dmp

Filesize
20KB

Download
memory/46048-106972-0x0000000000400000-0x0000000000405000-memory.dmp

Filesize
20KB

Download