66cb83b03a810acbd9b08071efcfb055b272da2df721695fc22624c6bb6cadd6

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
21/03/2023, 13:09

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General

Target
rReferenceNotice_pdf.exe
Size 249KB
Sample230321-qdr79scd5z
SHA256 66cb83b03a810acbd9b08071efcfb055b272da2df721695fc22624c6bb6cadd6
MD5 b3c87476205dddb0116e65ea556c0162
SHA1 925aef2b8e7666f04fb06c2de30aae3445ee929f
SHA512 02d0f18bb0df1d5887682b13534d021614599dab3162c118522f3a30460d73d47644d1dfe24dca4c8b34006fe718c5b88a069e9e8eef464a951bd0a149c77cb3
SSDEEP 6144:PYa6BCwFRtYQ88xkN8Q1UMbyBloNkxF5UDn+oNZdTM5:PYrrLtJ8I4xpNkxF5kn+IPA5
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

Malware Config

Signatures

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-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\International\Geo\Nation	clydryx.exe

Executes dropped EXE 2 IoCs

pid	Process
2240	clydryx.exe
4856	clydryx.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2240 set thread context of 4856	2240	clydryx.exe	87
PID 4856 set thread context of 676	4856	clydryx.exe	37
PID 1452 set thread context of 676	1452	raserver.exe	37

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3868	1820	WerFault.exe	95

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\Registry\User\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	raserver.exe

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{4336a54d-038b-4685-ab02-99bb52d3fb8b}\Instance\	Explorer.EXE
Key created	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000_Classes\CLSID\{018D5C66-4533-4307-9B53-224DE2ED1FE6}\Instance\	Explorer.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4856	clydryx.exe
4856	clydryx.exe
4856	clydryx.exe
4856	clydryx.exe
4856	clydryx.exe
4856	clydryx.exe
4856	clydryx.exe
4856	clydryx.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
676	Explorer.EXE

Suspicious behavior: MapViewOfSection 8 IoCs

pid	Process
2240	clydryx.exe
4856	clydryx.exe
4856	clydryx.exe
4856	clydryx.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe
1452	raserver.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	4856	clydryx.exe
Token: SeDebugPrivilege	1452	raserver.exe
Token: SeShutdownPrivilege	676	Explorer.EXE
Token: SeCreatePagefilePrivilege	676	Explorer.EXE
Token: SeShutdownPrivilege	676	Explorer.EXE
Token: SeCreatePagefilePrivilege	676	Explorer.EXE
Token: SeShutdownPrivilege	676	Explorer.EXE
Token: SeCreatePagefilePrivilege	676	Explorer.EXE

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 2672 wrote to memory of 2240	2672	rReferenceNotice_pdf.exe	85
PID 2672 wrote to memory of 2240	2672	rReferenceNotice_pdf.exe	85
PID 2672 wrote to memory of 2240	2672	rReferenceNotice_pdf.exe	85
PID 2240 wrote to memory of 4856	2240	clydryx.exe	87
PID 2240 wrote to memory of 4856	2240	clydryx.exe	87
PID 2240 wrote to memory of 4856	2240	clydryx.exe	87
PID 2240 wrote to memory of 4856	2240	clydryx.exe	87
PID 676 wrote to memory of 1452	676	Explorer.EXE	88
PID 676 wrote to memory of 1452	676	Explorer.EXE	88
PID 676 wrote to memory of 1452	676	Explorer.EXE	88
PID 1452 wrote to memory of 1820	1452	raserver.exe	95
PID 1452 wrote to memory of 1820	1452	raserver.exe	95
PID 1452 wrote to memory of 1820	1452	raserver.exe	95

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Modifies registry class
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:676
- C:\Users\Admin\AppData\Local\Temp\rReferenceNotice_pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\rReferenceNotice_pdf.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2672
- - C:\Users\Admin\AppData\Local\Temp\clydryx.exe
    "C:\Users\Admin\AppData\Local\Temp\clydryx.exe" C:\Users\Admin\AppData\Local\Temp\imdke.ub
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:2240
  - - C:\Users\Admin\AppData\Local\Temp\clydryx.exe
      "C:\Users\Admin\AppData\Local\Temp\clydryx.exe"
      4⤵
      Checks computer location settings
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of AdjustPrivilegeToken
      PID:4856
- C:\Windows\SysWOW64\raserver.exe
  "C:\Windows\SysWOW64\raserver.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Modifies Internet Explorer settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1452
- - C:\Program Files\Mozilla Firefox\Firefox.exe
    "C:\Program Files\Mozilla Firefox\Firefox.exe"
    3⤵
    PID:1820
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 1820 -s 128
      4⤵
      Program crash
      PID:3868

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -pss -s 460 -p 1820 -ip 1820
1⤵
PID:3052

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

clydryx.exe

Path C:\Users\Admin\AppData\Local\Temp\clydryx.exe
Size 5KB
SHA256 35971233cff0596e4e6ea657d261997489ae8618fbcf26ef0e8cd9ddd136f8f5
MD5 06dd25cc9b757db9772d566b1143628d
SHA1 1b5931912fe626e89d1b55fa10ef9ef6d66b6539
SHA512 66da3e81d5add2904fa9650f592eb63c75abbf69d7cc09b82b552b948a25b34c44ba8b9e7c416f045a077251520741e419a5085069408397520e5a8a04d8b617
SSDEEP 96:n8wZF3bluZz5b5P4oyn/7JhpywpZ6uYHrAhBPxesU8:n8UF3bY17P4oynl/ycZ6uYHrSBwsU8
MD5 SHA1 SHA512 SSDEEP

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clydryx.exe

Path C:\Users\Admin\AppData\Local\Temp\clydryx.exe
Size 5KB
SHA256 35971233cff0596e4e6ea657d261997489ae8618fbcf26ef0e8cd9ddd136f8f5
MD5 06dd25cc9b757db9772d566b1143628d
SHA1 1b5931912fe626e89d1b55fa10ef9ef6d66b6539
SHA512 66da3e81d5add2904fa9650f592eb63c75abbf69d7cc09b82b552b948a25b34c44ba8b9e7c416f045a077251520741e419a5085069408397520e5a8a04d8b617
SSDEEP 96:n8wZF3bluZz5b5P4oyn/7JhpywpZ6uYHrAhBPxesU8:n8UF3bY17P4oynl/ycZ6uYHrSBwsU8
MD5 SHA1 SHA512 SSDEEP

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clydryx.exe

Path C:\Users\Admin\AppData\Local\Temp\clydryx.exe
Size 5KB
SHA256 35971233cff0596e4e6ea657d261997489ae8618fbcf26ef0e8cd9ddd136f8f5
MD5 06dd25cc9b757db9772d566b1143628d
SHA1 1b5931912fe626e89d1b55fa10ef9ef6d66b6539
SHA512 66da3e81d5add2904fa9650f592eb63c75abbf69d7cc09b82b552b948a25b34c44ba8b9e7c416f045a077251520741e419a5085069408397520e5a8a04d8b617
SSDEEP 96:n8wZF3bluZz5b5P4oyn/7JhpywpZ6uYHrAhBPxesU8:n8UF3bY17P4oynl/ycZ6uYHrSBwsU8
MD5 SHA1 SHA512 SSDEEP

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imdke.ub

Path C:\Users\Admin\AppData\Local\Temp\imdke.ub
Size 5KB
SHA256 34892a92b99be819e65844dc3dd88a833251c0f53393ba6c1539f15c107b904e
MD5 ab841ce6ce10ec1ff39ff0594ff81352
SHA1 763dc6e9295d48bf03368e41025acb14f83f3fa3
SHA512 475b0add2550060e7b01d843fa317a6aab270679b730201f2c6424e97bd2cf69375e1745ea187de81d5508d1ec91434655c8dd2aa030b36a11ce17d17884e906
SSDEEP 96:Farc6oYQWg/DrYuTk2XO5oSwsHejeGdOEij7Kwd4OAHqMPdlPxXIf/3AVWmPX:FarcR9JLhX1Sh+j1d7ij7KLKOdUvNmPX
MD5 SHA1 SHA512 SSDEEP

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yeczoyxt.rbx

Path C:\Users\Admin\AppData\Local\Temp\yeczoyxt.rbx
Size 205KB
SHA256 b999ac862a9c8ce22570f411074b797a9cd1fb94ab35bab0ab83beaf2a08b3b9
MD5 a3e36d2a11ef4bde3a45b722d38e4de6
SHA1 693054ee3d5ae77d9ae102d5b015235c2bace585
SHA512 e182a9a77f63c3f5f6b87ef418dac9e3732037ea82d1d8cbf5fd9a8a0e0ff37976e3cc1a4aee26a16d1cb217494bf05a37fd57233d0b36626c9a0a1434a591c1
SSDEEP 6144:X78EY4bPoddQD82XSR8q1OrubO4tHYa5hvHcxS:IEYAPItztUOO4FVLv8xS
MD5 SHA1 SHA512 SSDEEP

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memory/676-157-0x0000000008A20000-0x0000000008AC0000-memory.dmp

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memory/676-164-0x0000000008A20000-0x0000000008AC0000-memory.dmp

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memory/676-148-0x0000000007AF0000-0x0000000007BEA000-memory.dmp

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memory/1452-153-0x0000000000F90000-0x0000000000FAF000-memory.dmp

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memory/1452-156-0x0000000002A50000-0x0000000002ADF000-memory.dmp

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memory/1452-155-0x0000000002D20000-0x000000000306A000-memory.dmp

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memory/1452-150-0x0000000000F90000-0x0000000000FAF000-memory.dmp

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memory/1452-154-0x0000000000B10000-0x0000000000B3D000-memory.dmp

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memory/4856-146-0x0000000000A20000-0x0000000000D6A000-memory.dmp

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memory/4856-149-0x0000000000400000-0x000000000042F000-memory.dmp

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memory/4856-147-0x00000000005C0000-0x00000000005D0000-memory.dmp

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memory/4856-145-0x0000000000400000-0x000000000042F000-memory.dmp

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memory/4856-144-0x0000000000400000-0x000000000042F000-memory.dmp

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memory/4856-141-0x0000000000400000-0x000000000042F000-memory.dmp

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