parallax | a352d00e0322a0e397f167c1164f7667c672935ba14d29c4f4b60f26d0a88f5d

General

Target

a352d00e0322a0e397f167c1164f7667c672935ba14d29c4f4b60f26d0a88f5d.exe
Size

557KB
MD5

11db2be72948149d039223e80f20c7bb
SHA1

f3c8ad546a0830a6d5eae197ef812479b1520696
SHA256

a352d00e0322a0e397f167c1164f7667c672935ba14d29c4f4b60f26d0a88f5d
SHA512

38457af6ec05d23d5851ec2f7d7f0e281fd9634df2d44a50db1a75c73c4e8c42bacfd7e77445f83a981e479dbb1cd27250f450900d05bef37f701f590c7bc91a

Score

10^/10

parallax persistence rat

Malware Config

Signatures

ParallaxRat
ParallaxRat is a multipurpose RAT written in MASM.
rat parallax

ParallaxRat payload 6 IoCs

Detects payload of Parallax Rat, a small portable Rat usually digitally signed with a Sectigo certificate.

resource	yara_rule
behavioral2/memory/2004-131-0x0000000000400000-0x0000000000491000-memory.dmp	parallax_rat
behavioral2/memory/2004-133-0x0000000000400000-0x0000000000491000-memory.dmp	parallax_rat
behavioral2/memory/2004-135-0x0000000000400000-0x0000000000491000-memory.dmp	parallax_rat
behavioral2/memory/4492-136-0x0000000000400000-0x0000000000491000-memory.dmp	parallax_rat
behavioral2/memory/4492-138-0x0000000000400000-0x0000000000491000-memory.dmp	parallax_rat
behavioral2/memory/4492-139-0x0000000000400000-0x0000000000491000-memory.dmp	parallax_rat

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-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation	a352d00e0322a0e397f167c1164f7667c672935ba14d29c4f4b60f26d0a88f5d.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\ = "C:\\Users\\Admin\\AppData\\Roaming\\System32\\csrss.exe.exe"	csrss.exe.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: RenamesItself 1 IoCs

pid	Process
2004	a352d00e0322a0e397f167c1164f7667c672935ba14d29c4f4b60f26d0a88f5d.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2004 wrote to memory of 4492	2004	a352d00e0322a0e397f167c1164f7667c672935ba14d29c4f4b60f26d0a88f5d.exe	87
PID 2004 wrote to memory of 4492	2004	a352d00e0322a0e397f167c1164f7667c672935ba14d29c4f4b60f26d0a88f5d.exe	87
PID 2004 wrote to memory of 4492	2004	a352d00e0322a0e397f167c1164f7667c672935ba14d29c4f4b60f26d0a88f5d.exe	87

C:\Users\Admin\AppData\Local\Temp\a352d00e0322a0e397f167c1164f7667c672935ba14d29c4f4b60f26d0a88f5d.exe
"C:\Users\Admin\AppData\Local\Temp\a352d00e0322a0e397f167c1164f7667c672935ba14d29c4f4b60f26d0a88f5d.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: RenamesItself
- Suspicious use of WriteProcessMemory
PID:2004
- C:\Users\Admin\AppData\Roaming\System32\csrss.exe.exe
  "C:\Users\Admin\AppData\Roaming\System32\csrss.exe.exe"
  2⤵
  - Adds Run key to start application
  PID:4492

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2004-130-0x0000000002540000-0x00000000028D0000-memory.dmp

Filesize
3.6MB

Download
memory/2004-131-0x0000000000400000-0x0000000000491000-memory.dmp

Filesize
580KB

Download
memory/2004-133-0x0000000000400000-0x0000000000491000-memory.dmp

Filesize
580KB

Download
memory/2004-135-0x0000000000400000-0x0000000000491000-memory.dmp

Filesize
580KB

Download
memory/4492-136-0x0000000000400000-0x0000000000491000-memory.dmp

Filesize
580KB

Download
memory/4492-138-0x0000000000400000-0x0000000000491000-memory.dmp

Filesize
580KB

Download
memory/4492-139-0x0000000000400000-0x0000000000491000-memory.dmp

Filesize
580KB

Download

Analysis

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