valleyrat_s2 | 9e78f89ffa70b6426595e1007db89bc2bd9fd39600d659a347f4689c5a1e67ad

Analysis

max time kernel
149s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
submitted
01/04/2025, 17:03

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General

Target

9e78f89ffa70b6426595e1007db89bc2bd9fd39600d659a347f4689c5a1e67ad.exe
Size

4.4MB
MD5

065029491d64e41610d29b401a173afe
SHA1

938c3da5cad02617f8924874abda72e0121ea357
SHA256

9e78f89ffa70b6426595e1007db89bc2bd9fd39600d659a347f4689c5a1e67ad
SHA512

9716a64662d5235c71aa3b2e21460bc105f6656fb5a5544c722f01de4321970b19f29548aae48506e75f15a0edd1f02021023cbfaaeac4074ca52421ccf79ca6
SSDEEP

98304:WGhi/i/i/i/i/i/i/i/i/i/i/i/i/i/i/i/i/i/i/i/i/i/i/i/i/i/i/i/i/i/X:8qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqO

Score

10^/10

valleyrat_s2 backdoor discovery

Malware Config

Extracted

Family

valleyrat_s2

Version

1.0

47.236.171.20:10000

47.236.171.20:20000

127.0.0.1:80

Attributes

campaign_date
2024.12.25

Signatures

ValleyRat
ValleyRat stage2 is a backdoor written in C++.
backdoor valleyrat_s2
Valleyrat_s2 family
valleyrat_s2

Executes dropped EXE 1 IoCs

pid	Process
4780	~Edwos.tmp

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)	\??\T:	~Edwos.tmp
File opened (read-only)	\??\X:	~Edwos.tmp
File opened (read-only)	\??\H:	~Edwos.tmp
File opened (read-only)	\??\M:	~Edwos.tmp
File opened (read-only)	\??\Q:	~Edwos.tmp
File opened (read-only)	\??\R:	~Edwos.tmp
File opened (read-only)	\??\Y:	~Edwos.tmp
File opened (read-only)	\??\B:	~Edwos.tmp
File opened (read-only)	\??\G:	~Edwos.tmp
File opened (read-only)	\??\O:	~Edwos.tmp
File opened (read-only)	\??\P:	~Edwos.tmp
File opened (read-only)	\??\S:	~Edwos.tmp
File opened (read-only)	\??\Z:	~Edwos.tmp
File opened (read-only)	\??\E:	~Edwos.tmp
File opened (read-only)	\??\I:	~Edwos.tmp
File opened (read-only)	\??\J:	~Edwos.tmp
File opened (read-only)	\??\K:	~Edwos.tmp
File opened (read-only)	\??\U:	~Edwos.tmp
File opened (read-only)	\??\V:	~Edwos.tmp
File opened (read-only)	\??\W:	~Edwos.tmp
File opened (read-only)	\??\L:	~Edwos.tmp
File opened (read-only)	\??\N:	~Edwos.tmp

System Location Discovery: System Language Discovery 1 TTPs 2 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	9e78f89ffa70b6426595e1007db89bc2bd9fd39600d659a347f4689c5a1e67ad.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	~Edwos.tmp

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2436 wrote to memory of 4780	2436	9e78f89ffa70b6426595e1007db89bc2bd9fd39600d659a347f4689c5a1e67ad.exe	93
PID 2436 wrote to memory of 4780	2436	9e78f89ffa70b6426595e1007db89bc2bd9fd39600d659a347f4689c5a1e67ad.exe	93
PID 2436 wrote to memory of 4780	2436	9e78f89ffa70b6426595e1007db89bc2bd9fd39600d659a347f4689c5a1e67ad.exe	93

C:\Users\Admin\AppData\Local\Temp\9e78f89ffa70b6426595e1007db89bc2bd9fd39600d659a347f4689c5a1e67ad.exe
"C:\Users\Admin\AppData\Local\Temp\9e78f89ffa70b6426595e1007db89bc2bd9fd39600d659a347f4689c5a1e67ad.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2436
- C:\ProgramData\~Edwos.tmp
  C:\ProgramData\~Edwos.tmp
  2⤵
  - Executes dropped EXE
  - Enumerates connected drives
  - System Location Discovery: System Language Discovery
  PID:4780

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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:\ProgramData\~Edwos.tmp

Filesize
4.4MB

MD5
065029491d64e41610d29b401a173afe

SHA1
938c3da5cad02617f8924874abda72e0121ea357

SHA256
9e78f89ffa70b6426595e1007db89bc2bd9fd39600d659a347f4689c5a1e67ad

SHA512
9716a64662d5235c71aa3b2e21460bc105f6656fb5a5544c722f01de4321970b19f29548aae48506e75f15a0edd1f02021023cbfaaeac4074ca52421ccf79ca6

Download Submit
memory/2436-0-0x0000000077731000-0x0000000077851000-memory.dmp

Filesize
1.1MB

Download
memory/4780-5-0x0000000010000000-0x0000000010021000-memory.dmp

Filesize
132KB

Download
memory/4780-13-0x0000000002C30000-0x0000000002C5E000-memory.dmp

Filesize
184KB

Download
memory/4780-15-0x0000000003430000-0x0000000003464000-memory.dmp

Filesize
208KB

Download
memory/4780-14-0x0000000003430000-0x0000000003464000-memory.dmp

Filesize
208KB

Download
memory/4780-18-0x0000000003430000-0x0000000003464000-memory.dmp

Filesize
208KB

Download
memory/4780-19-0x0000000003430000-0x0000000003464000-memory.dmp

Filesize
208KB

Download
memory/4780-20-0x0000000003430000-0x0000000003464000-memory.dmp

Filesize
208KB

Download
memory/4780-21-0x0000000003430000-0x0000000003464000-memory.dmp

Filesize
208KB

Download