3451b5de53ab5bad7205166dd7d3f0ea8cb0a75b999042b325eab8d5b91525de

Analysis

max time kernel
151s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
07/11/2022, 01:53

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General

Target

3451b5de53ab5bad7205166dd7d3f0ea8cb0a75b999042b325eab8d5b91525de.exe
Size

284KB
MD5

0895669f60bb393254c4c64554bb6ff0
SHA1

1a8494d9e3cbf040dfbca759158fab6d18962f9a
SHA256

3451b5de53ab5bad7205166dd7d3f0ea8cb0a75b999042b325eab8d5b91525de
SHA512

5c8cbd0cea3105cc559cdd0c5e309075ac945367c5814a789d12d696b61fb4fe3a45ee3b980c02e8e7b472113cdeeebfeddb5677cbbe8040089aa149745bec29
SSDEEP

3072:mSQ0EWVwZhKxC5Rt+k60Zh+qw6PYSsszfHZTZJ2lC:mPA6wxmuJspr2l

Score

8^/10

persistence upx

Malware Config

Signatures

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\45958 = "C:\\PROGRA~3\\LOCALS~1\\Temp\\msosnop.bat"	svchost.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	svchost.exe

Executes dropped EXE 3 IoCs

pid	Process
4316	skyrpe.exe
956	skyrpe.exe
4644	skyrpe.exe

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1880-135-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/1880-137-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/1880-138-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/1880-141-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/1880-150-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/956-162-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/1880-163-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/956-168-0x0000000000400000-0x000000000040B000-memory.dmp	upx

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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	3451b5de53ab5bad7205166dd7d3f0ea8cb0a75b999042b325eab8d5b91525de.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\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 3916 set thread context of 1880	3916	3451b5de53ab5bad7205166dd7d3f0ea8cb0a75b999042b325eab8d5b91525de.exe	80
PID 4316 set thread context of 956	4316	skyrpe.exe	86
PID 4316 set thread context of 4644	4316	skyrpe.exe	87

Drops file in Program Files directory 1 IoCs

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

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4644	skyrpe.exe
4644	skyrpe.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4644	skyrpe.exe

Suspicious use of AdjustPrivilegeToken 50 IoCs

description	pid	Process
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe
Token: SeDebugPrivilege	956	skyrpe.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
3916	3451b5de53ab5bad7205166dd7d3f0ea8cb0a75b999042b325eab8d5b91525de.exe
1880	3451b5de53ab5bad7205166dd7d3f0ea8cb0a75b999042b325eab8d5b91525de.exe
4316	skyrpe.exe
956	skyrpe.exe

Suspicious use of WriteProcessMemory 34 IoCs

description	pid	Process	procid_target
PID 3916 wrote to memory of 1880	3916	3451b5de53ab5bad7205166dd7d3f0ea8cb0a75b999042b325eab8d5b91525de.exe	80
PID 3916 wrote to memory of 1880	3916	3451b5de53ab5bad7205166dd7d3f0ea8cb0a75b999042b325eab8d5b91525de.exe	80
PID 3916 wrote to memory of 1880	3916	3451b5de53ab5bad7205166dd7d3f0ea8cb0a75b999042b325eab8d5b91525de.exe	80
PID 3916 wrote to memory of 1880	3916	3451b5de53ab5bad7205166dd7d3f0ea8cb0a75b999042b325eab8d5b91525de.exe	80
PID 3916 wrote to memory of 1880	3916	3451b5de53ab5bad7205166dd7d3f0ea8cb0a75b999042b325eab8d5b91525de.exe	80
PID 3916 wrote to memory of 1880	3916	3451b5de53ab5bad7205166dd7d3f0ea8cb0a75b999042b325eab8d5b91525de.exe	80
PID 3916 wrote to memory of 1880	3916	3451b5de53ab5bad7205166dd7d3f0ea8cb0a75b999042b325eab8d5b91525de.exe	80
PID 3916 wrote to memory of 1880	3916	3451b5de53ab5bad7205166dd7d3f0ea8cb0a75b999042b325eab8d5b91525de.exe	80
PID 1880 wrote to memory of 2324	1880	3451b5de53ab5bad7205166dd7d3f0ea8cb0a75b999042b325eab8d5b91525de.exe	81
PID 1880 wrote to memory of 2324	1880	3451b5de53ab5bad7205166dd7d3f0ea8cb0a75b999042b325eab8d5b91525de.exe	81
PID 1880 wrote to memory of 2324	1880	3451b5de53ab5bad7205166dd7d3f0ea8cb0a75b999042b325eab8d5b91525de.exe	81
PID 2324 wrote to memory of 3568	2324	cmd.exe	84
PID 2324 wrote to memory of 3568	2324	cmd.exe	84
PID 2324 wrote to memory of 3568	2324	cmd.exe	84
PID 1880 wrote to memory of 4316	1880	3451b5de53ab5bad7205166dd7d3f0ea8cb0a75b999042b325eab8d5b91525de.exe	85
PID 1880 wrote to memory of 4316	1880	3451b5de53ab5bad7205166dd7d3f0ea8cb0a75b999042b325eab8d5b91525de.exe	85
PID 1880 wrote to memory of 4316	1880	3451b5de53ab5bad7205166dd7d3f0ea8cb0a75b999042b325eab8d5b91525de.exe	85
PID 4316 wrote to memory of 956	4316	skyrpe.exe	86
PID 4316 wrote to memory of 956	4316	skyrpe.exe	86
PID 4316 wrote to memory of 956	4316	skyrpe.exe	86
PID 4316 wrote to memory of 956	4316	skyrpe.exe	86
PID 4316 wrote to memory of 956	4316	skyrpe.exe	86
PID 4316 wrote to memory of 956	4316	skyrpe.exe	86
PID 4316 wrote to memory of 956	4316	skyrpe.exe	86
PID 4316 wrote to memory of 956	4316	skyrpe.exe	86
PID 4316 wrote to memory of 4644	4316	skyrpe.exe	87
PID 4316 wrote to memory of 4644	4316	skyrpe.exe	87
PID 4316 wrote to memory of 4644	4316	skyrpe.exe	87
PID 4316 wrote to memory of 4644	4316	skyrpe.exe	87
PID 4316 wrote to memory of 4644	4316	skyrpe.exe	87
PID 4316 wrote to memory of 4644	4316	skyrpe.exe	87
PID 4644 wrote to memory of 1192	4644	skyrpe.exe	88
PID 4644 wrote to memory of 1192	4644	skyrpe.exe	88
PID 4644 wrote to memory of 1192	4644	skyrpe.exe	88

C:\Users\Admin\AppData\Local\Temp\3451b5de53ab5bad7205166dd7d3f0ea8cb0a75b999042b325eab8d5b91525de.exe
"C:\Users\Admin\AppData\Local\Temp\3451b5de53ab5bad7205166dd7d3f0ea8cb0a75b999042b325eab8d5b91525de.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3916
- C:\Users\Admin\AppData\Local\Temp\3451b5de53ab5bad7205166dd7d3f0ea8cb0a75b999042b325eab8d5b91525de.exe
  "C:\Users\Admin\AppData\Local\Temp\3451b5de53ab5bad7205166dd7d3f0ea8cb0a75b999042b325eab8d5b91525de.exe"
  2⤵
  - Checks computer location settings
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1880
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\CHVUG.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2324
  - - 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
      PID:3568
- - C:\Users\Admin\AppData\Roaming\skype\skyrpe.exe
    "C:\Users\Admin\AppData\Roaming\skype\skyrpe.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4316
  - - C:\Users\Admin\AppData\Roaming\skype\skyrpe.exe
      "C:\Users\Admin\AppData\Roaming\skype\skyrpe.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      PID:956
  - - 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
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of WriteProcessMemory
      PID:4644
    - - C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\syswow64\svchost.exe
        5⤵
        Adds policy Run key to start application
        Drops file in Program Files directory
        
        PID:1192

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
139B

MD5
0654f004b2e314bad7f75867e91da37d

SHA1
4232c22e7340b12108d86e3cb35ed288a3dbc7f1

SHA256
ead325a060300a9606a3f0f14694be39a3e4006a60c6c3eb0bea5d6f98192249

SHA512
dda135cdfca90a742d42b4c7a5e7f5df6580ec428302a8f0c311f5b92eb08dda75774e0c7497110faffbe2dfa02b30d2dfe35ec2848a275f53be8d930c7aa553

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

Filesize
284KB

MD5
000ca9d0fb0c4b0022b2b64331c78ff1

SHA1
6f6366fcc45591fc2fb230d87acd0883849e7de5

SHA256
da66fddf14e308a6a4c26faa3dd31c3caab8b7a7b96536bd041c8a7e924807a2

SHA512
3b5e86affdf47402ab1858d23f0f17bd68da3afddccb5ab60757131ab58143fcf32c5865f676eb7ad07e5e952721985e934182be0df10e26351b848867d6fc48

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

Filesize
284KB

MD5
000ca9d0fb0c4b0022b2b64331c78ff1

SHA1
6f6366fcc45591fc2fb230d87acd0883849e7de5

SHA256
da66fddf14e308a6a4c26faa3dd31c3caab8b7a7b96536bd041c8a7e924807a2

SHA512
3b5e86affdf47402ab1858d23f0f17bd68da3afddccb5ab60757131ab58143fcf32c5865f676eb7ad07e5e952721985e934182be0df10e26351b848867d6fc48

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

Filesize
284KB

MD5
000ca9d0fb0c4b0022b2b64331c78ff1

SHA1
6f6366fcc45591fc2fb230d87acd0883849e7de5

SHA256
da66fddf14e308a6a4c26faa3dd31c3caab8b7a7b96536bd041c8a7e924807a2

SHA512
3b5e86affdf47402ab1858d23f0f17bd68da3afddccb5ab60757131ab58143fcf32c5865f676eb7ad07e5e952721985e934182be0df10e26351b848867d6fc48

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

Filesize
284KB

MD5
000ca9d0fb0c4b0022b2b64331c78ff1

SHA1
6f6366fcc45591fc2fb230d87acd0883849e7de5

SHA256
da66fddf14e308a6a4c26faa3dd31c3caab8b7a7b96536bd041c8a7e924807a2

SHA512
3b5e86affdf47402ab1858d23f0f17bd68da3afddccb5ab60757131ab58143fcf32c5865f676eb7ad07e5e952721985e934182be0df10e26351b848867d6fc48

Download Submit
memory/956-162-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/956-168-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1192-169-0x00000000007B0000-0x00000000007B5000-memory.dmp

Filesize
20KB

Download
memory/1192-167-0x00000000007B0000-0x00000000007B5000-memory.dmp

Filesize
20KB

Download
memory/1192-166-0x0000000000A90000-0x0000000000A95000-memory.dmp

Filesize
20KB

Download
memory/1880-163-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1880-137-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1880-135-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1880-150-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1880-138-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1880-141-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4644-157-0x0000000000400000-0x0000000000405000-memory.dmp

Filesize
20KB

Download
memory/4644-165-0x0000000000400000-0x0000000000405000-memory.dmp

Filesize
20KB

Download