valleyrat_s2 | e590bd6c6cc790785cf44ed515bbf1a1f7689ba507f434dee1552af45955d3d3

Analysis

max time kernel
150s
max time network
153s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260710-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260710-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
08/09/2026, 04:02

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General

Target
e590bd6c6cc790785cf44ed515bbf1a1f7689ba507f434dee1552af45955d3d3.dll
Size 7.2MB
Sample260908-ely51acm7y
SHA256 e590bd6c6cc790785cf44ed515bbf1a1f7689ba507f434dee1552af45955d3d3
MD5 36b7fd4ad600cceee374e6e4196ede72
SHA1 c5ce69d71a14de00be3e34d8bfb187fe645ddaa9
SHA512 180f6475d37352ca6b8df8670952fcf8193497839ba4eb81d446fcdb9af8a7f3a0f3d72d8ff26f7ec381d0c1606993e3be2a8a503814ab669328c393146e8d43
SSDEEP 98304:wcIFvrbEKwnknMcJAOk8bjdHiaQpNOomXroiQUyXyT9+zxQvTL:WvrAFfEdCzNfmXkYyXyxC
TLSH
T19476AE01A9EC44B9D46EE437C2D7BA6BD2F17C050531860F9F913A466F737029A2B36E
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor defense_evasion discovery execution valleyrat_s2 persistence ransomware

Malware Config

Signatures

Family: ValleyRat
ValleyRat stage2 is a backdoor written in C++.
backdoor valleyrat_s2

Detects ValleyRAT payload 7 IoCs

resource	yara_rule
behavioral2/memory/5104-6-0x00000187DC3D0000-0x00000187DC439000-memory.dmp	family_valleyrat_stage_2_v2
behavioral2/memory/5104-8-0x00000187DE640000-0x00000187DE6B0000-memory.dmp	family_valleyrat_stage_2_v2
behavioral2/memory/5104-7-0x00000187DE640000-0x00000187DE6B0000-memory.dmp	family_valleyrat_stage_2_v2
behavioral2/memory/5104-11-0x00000187DE640000-0x00000187DE6B0000-memory.dmp	family_valleyrat_stage_2_v2
behavioral2/memory/5104-13-0x00000187DE640000-0x00000187DE6B0000-memory.dmp	family_valleyrat_stage_2_v2
behavioral2/memory/5104-14-0x00000187DE640000-0x00000187DE6B0000-memory.dmp	family_valleyrat_stage_2_v2
behavioral2/memory/5104-18-0x00000187DE640000-0x00000187DE6B0000-memory.dmp	family_valleyrat_stage_2_v2

Badlisted process makes network request 9 IoCs

Network request originating from process or tool commonly abused by malware.

flow	pid	Process
1	5104	rundll32.exe
2	5104	rundll32.exe
4	5104	rundll32.exe
5	5104	rundll32.exe
6	5104	rundll32.exe
7	5104	rundll32.exe
8	5104	rundll32.exe
9	5104	rundll32.exe
10	5104	rundll32.exe

Executes dropped EXE 1 IoCs

pid	Process
1632	rundll32.exe

Enumerates connected drives 3 TTPs 22 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\V:	rundll32.exe
File opened (read-only)	\??\J:	rundll32.exe
File opened (read-only)	\??\K:	rundll32.exe
File opened (read-only)	\??\L:	rundll32.exe
File opened (read-only)	\??\S:	rundll32.exe
File opened (read-only)	\??\W:	rundll32.exe
File opened (read-only)	\??\X:	rundll32.exe
File opened (read-only)	\??\Y:	rundll32.exe
File opened (read-only)	\??\R:	rundll32.exe
File opened (read-only)	\??\B:	rundll32.exe
File opened (read-only)	\??\G:	rundll32.exe
File opened (read-only)	\??\H:	rundll32.exe
File opened (read-only)	\??\M:	rundll32.exe
File opened (read-only)	\??\O:	rundll32.exe
File opened (read-only)	\??\T:	rundll32.exe
File opened (read-only)	\??\U:	rundll32.exe
File opened (read-only)	\??\Z:	rundll32.exe
File opened (read-only)	\??\D:	rundll32.exe
File opened (read-only)	\??\I:	rundll32.exe
File opened (read-only)	\??\N:	rundll32.exe
File opened (read-only)	\??\P:	rundll32.exe
File opened (read-only)	\??\Q:	rundll32.exe

Looks up external IP address via web service 1 TTPs 4 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

discovery

Internet Connection Discovery

T1016.001

flow	ioc
3	api.ipify.org
3	icanhazip.com
3	ip-api.com
4	api.ipify.org

Discovers running processes 1 TTPs 3 IoCs

Running process information can be used to identify security tools or plan follow-on actions.

discovery

Process Discovery

T1057

pid	Process
3348	tasklist.exe
772	tasklist.exe
3192	tasklist.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\rundll32.exe	rundll32.exe

Executes a command shell one-liner 1 TTPs 2 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
2632	cmd.exe
5072	cmd.exe

Delays execution with timeout.exe 3 IoCs

defense_evasion

pid	Process
3580	timeout.exe
6020	timeout.exe
2092	timeout.exe

Kills process with taskkill 1 IoCs

defense_evasion

pid	Process
4188	taskkill.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe
5104	rundll32.exe

Suspicious use of AdjustPrivilegeToken 44 IoCs

description	pid	Process
Token: SeDebugPrivilege	5104	rundll32.exe
Token: SeLoadDriverPrivilege	5104	rundll32.exe
Token: SeTakeOwnershipPrivilege	5104	rundll32.exe
Token: SeIncBasePriorityPrivilege	5104	rundll32.exe
Token: SeTcbPrivilege	5104	rundll32.exe
Token: SeDebugPrivilege	4188	taskkill.exe
Token: SeDebugPrivilege	5104	rundll32.exe
Token: SeCreateTokenPrivilege	5104	rundll32.exe
Token: SeAssignPrimaryTokenPrivilege	5104	rundll32.exe
Token: SeLockMemoryPrivilege	5104	rundll32.exe
Token: SeIncreaseQuotaPrivilege	5104	rundll32.exe
Token: SeMachineAccountPrivilege	5104	rundll32.exe
Token: SeTcbPrivilege	5104	rundll32.exe
Token: SeSecurityPrivilege	5104	rundll32.exe
Token: SeTakeOwnershipPrivilege	5104	rundll32.exe
Token: SeLoadDriverPrivilege	5104	rundll32.exe
Token: SeSystemProfilePrivilege	5104	rundll32.exe
Token: SeSystemtimePrivilege	5104	rundll32.exe
Token: SeProfSingleProcessPrivilege	5104	rundll32.exe
Token: SeIncBasePriorityPrivilege	5104	rundll32.exe
Token: SeCreatePagefilePrivilege	5104	rundll32.exe
Token: SeCreatePermanentPrivilege	5104	rundll32.exe
Token: SeBackupPrivilege	5104	rundll32.exe
Token: SeRestorePrivilege	5104	rundll32.exe
Token: SeShutdownPrivilege	5104	rundll32.exe
Token: SeDebugPrivilege	5104	rundll32.exe
Token: SeAuditPrivilege	5104	rundll32.exe
Token: SeSystemEnvironmentPrivilege	5104	rundll32.exe
Token: SeChangeNotifyPrivilege	5104	rundll32.exe
Token: SeRemoteShutdownPrivilege	5104	rundll32.exe
Token: SeUndockPrivilege	5104	rundll32.exe
Token: SeSyncAgentPrivilege	5104	rundll32.exe
Token: SeEnableDelegationPrivilege	5104	rundll32.exe
Token: SeManageVolumePrivilege	5104	rundll32.exe
Token: SeImpersonatePrivilege	5104	rundll32.exe
Token: SeCreateGlobalPrivilege	5104	rundll32.exe
Token: 31	5104	rundll32.exe
Token: 32	5104	rundll32.exe
Token: 33	5104	rundll32.exe
Token: 34	5104	rundll32.exe
Token: 35	5104	rundll32.exe
Token: SeDebugPrivilege	3348	tasklist.exe
Token: SeDebugPrivilege	772	tasklist.exe
Token: SeDebugPrivilege	3192	tasklist.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
5104	rundll32.exe
5104	rundll32.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 5104 wrote to memory of 4188	5104	rundll32.exe	89
PID 5104 wrote to memory of 2632	5104	rundll32.exe	94
PID 2632 wrote to memory of 5072	2632	cmd.exe	96
PID 5072 wrote to memory of 3348	5072	cmd.exe	97
PID 5072 wrote to memory of 4940	5072	cmd.exe	98
PID 5072 wrote to memory of 3580	5072	cmd.exe	99
PID 5072 wrote to memory of 772	5072	cmd.exe	102
PID 5072 wrote to memory of 5884	5072	cmd.exe	103
PID 5072 wrote to memory of 6020	5072	cmd.exe	104
PID 5072 wrote to memory of 3192	5072	cmd.exe	105
PID 5072 wrote to memory of 5840	5072	cmd.exe	106
PID 5072 wrote to memory of 2092	5072	cmd.exe	107

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012
Uses Volume Shadow Copy WMI provider
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware
Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\e590bd6c6cc790785cf44ed515bbf1a1f7689ba507f434dee1552af45955d3d3.dll,#1
1⤵
- Badlisted process makes network request
- Enumerates connected drives
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5104
- C:\Windows\system32\taskkill.exe
  taskkill /f /im cmd.exe
  2⤵
  - Kills process with taskkill
  - Suspicious use of AdjustPrivilegeToken
  PID:4188
- C:\Windows\system32\cmd.exe
  cmd.exe /c start "" /B cmd /C C:\Users\Public\Public_Release\S-1-5-21-2246396966-3025826688-3847171515\S-1-5-21-2246396966-3025826688-3847171515.bAt
  2⤵
  - Executes a command shell one-liner
  - Suspicious use of WriteProcessMemory
  PID:2632
- - C:\Windows\system32\cmd.exe
    cmd /C C:\Users\Public\Public_Release\S-1-5-21-2246396966-3025826688-3847171515\S-1-5-21-2246396966-3025826688-3847171515.bAt
    3⤵
    - Executes a command shell one-liner
    - Suspicious use of WriteProcessMemory
    PID:5072
  - - C:\Windows\system32\tasklist.exe
      TASKLIST /FI "IMAGENAME eq rundll32.exe" /FO CSV
      4⤵
      Discovers running processes
      Suspicious use of AdjustPrivilegeToken
      PID:3348
  - - C:\Windows\system32\find.exe
      FIND /I "rundll32.exe"
      4⤵
      PID:4940
  - - C:\Windows\system32\timeout.exe
      TIMEOUT /t 60 /nobreak
      4⤵
      Delays execution with timeout.exe
      PID:3580
  - - C:\Windows\system32\tasklist.exe
      TASKLIST /FI "IMAGENAME eq rundll32.exe" /FO CSV
      4⤵
      Discovers running processes
      Suspicious use of AdjustPrivilegeToken
      PID:772
  - - C:\Windows\system32\find.exe
      FIND /I "rundll32.exe"
      4⤵
      PID:5884
  - - C:\Windows\system32\timeout.exe
      TIMEOUT /t 60 /nobreak
      4⤵
      Delays execution with timeout.exe
      PID:6020
  - - C:\Windows\system32\tasklist.exe
      TASKLIST /FI "IMAGENAME eq rundll32.exe" /FO CSV
      4⤵
      Discovers running processes
      Suspicious use of AdjustPrivilegeToken
      PID:3192
  - - C:\Windows\system32\find.exe
      FIND /I "rundll32.exe"
      4⤵
      PID:5840
  - - C:\Windows\system32\timeout.exe
      TIMEOUT /t 60 /nobreak
      4⤵
      Delays execution with timeout.exe
      PID:2092

C:\Windows\system32\rundll32.exe
C:\Windows\system32\rundll32.exe
1⤵
- Executes dropped EXE
PID:1632

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k GPSvcGroup
1⤵
PID:4088

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Windows Command Shell

T1059.003

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Process Discovery

T1057

Query Registry

T1012

System Information Discovery

T1082

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

S-1-5-21-2246396966-3025826688-3847171515.bAt

Path C:\Users\Public\Public_Release\S-1-5-21-2246396966-3025826688-3847171515\S-1-5-21-2246396966-3025826688-3847171515.bAt
Size 1KB
SHA256 127cb545fdd0354d1093d46776d5dbf87660329795392fe3ec5967cccf061952
MD5 bcf22aef6edf6efe58301b2ca006065a
SHA1 3ed5c2a971d9c3b8286ae24054656b9f19d7119f
SHA512 6753d41cac6dc76c806464fd5620b5499f4941431262ea9b28d768e43951f20db77a7983e097512cb3bb1569176a4de47ec51c81b0a577f9c05a284d3abb7eea
TLSH
T18F31906FC4178D1E436502EF13458C5FC740F06BED8570A0B1D95B852395A9D09A6BEE
MD5 SHA1 SHA512 TLSH

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rundll32.exe

Path C:\Windows\System32\rundll32.exe
Size 88KB
SHA256 4b84dc6750937eb47b19cde0d23debd4d2f2211300171b36d13ef5ad11dd60f9
MD5 025b13bf5652712d9b596e6766a9c386
SHA1 def4011b5536983285472ba75c22c6a2410edf6a
SHA512 f9983b897ef7ecbeb6cbfe599b24f5aa8651058d2e3313534a2a5e076f93fc3354784c05260b42fa828e48a55b5c005bfaa9db4e387351bf2e665ea0245c3a1e
SSDEEP 1536:7i3jG+UJuhM2HLJPl1M8CFYNMjYrZ3bXWgmqR9jR:KkuB5GFYNME3C9KR
TLSH
T11993185E72A830E5E9369139C4A24605E3B1B03563135BFF06E0C2BD5F23AE5AD39F91
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/5104-0-0x00007FFAE0CA0000-0x00007FFAE13CF000-memory.dmp

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memory/5104-6-0x00000187DC3D0000-0x00000187DC439000-memory.dmp

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memory/5104-8-0x00000187DE640000-0x00000187DE6B0000-memory.dmp

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memory/5104-7-0x00000187DE640000-0x00000187DE6B0000-memory.dmp

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memory/5104-11-0x00000187DE640000-0x00000187DE6B0000-memory.dmp

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memory/5104-13-0x00000187DE640000-0x00000187DE6B0000-memory.dmp

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memory/5104-14-0x00000187DE640000-0x00000187DE6B0000-memory.dmp

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memory/5104-18-0x00000187DE640000-0x00000187DE6B0000-memory.dmp

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memory/5104-30-0x00007FFAE0CA0000-0x00007FFAE13CF000-memory.dmp

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