phorphiex | 5a651b2be779e145cde1ec5859f66a540c80e06af4504108fb8ed36396e463f9

General

Target

25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e.exe
Size

818KB
MD5

dd1aa660f2f24368dd58c5ce7a709b6c
SHA1

a54d435a04d3e883b1773d1c8d439dc95628fa07
SHA256

25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e
SHA512

a86738a5fd7915f3fbd9ddc8b5c3e01a936074749b7e8d14ceb91defef6657b5e5c1fc76fc6461b86424add2099c14b90c88b7b84de53928404562f2148b16b5

Score

10^/10

phorphiex evasion loader persistence trojan worm

Malware Config

Signatures

Modifies Windows Defender Real-time Protection settings 3 TTPs
evasion trojan

Modify Registry
T1112

Modify Existing Service
T1031

Disabling Security Tools
T1089

Phorphiex Payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1840-115-0x0000000000400000-0x00000000004D2000-memory.dmp	family_phorphiex

Phorphiex Worm
Malware family which infects systems to distribute other malicious payloads such as ransomware, stealers and cryptominers.
worm trojan loader phorphiex
Windows security bypass 2 TTPs
evasion trojan

Disabling Security Tools
T1089

Modify Registry
T1112
Executes dropped EXE 1 IoCs

Processes:

csrss.exe

pid process

4012 csrss.exe

pid	process
4012	csrss.exe

Windows security modification 2 TTPs 7 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

csrss.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesOverride = "1"	csrss.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallOverride = "1"	csrss.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	csrss.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	csrss.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AutoUpdateDisableNotify = "1"	csrss.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallDisableNotify = "1"	csrss.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusOverride = "1"	csrss.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Client Server Runtime Process = "C:\\Windows\\15075354021841\\csrss.exe"	25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows\CurrentVersion\Run\Client Server Runtime Process = "C:\\Windows\\15075354021841\\csrss.exe"	25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e.exe

Drops file in Program Files directory 3 IoCs

Processes:

csrss.exe

description	ioc	process
File opened for modification	C:\Program Files\7-Zip\7z.exe	csrss.exe
File opened for modification	C:\Program Files\7-Zip\7zfm.exe	csrss.exe
File opened for modification	C:\Program Files\7-Zip\7zg.exe	csrss.exe

Drops file in Windows directory 3 IoCs

Processes:

25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e.exe

description	ioc	process
File created	C:\Windows\15075354021841\csrss.exe	25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e.exe
File opened for modification	C:\Windows\15075354021841\csrss.exe	25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e.exe
File opened for modification	C:\Windows\15075354021841	25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e.exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

2124 4012 WerFault.exe csrss.exe

pid	pid_target	process	target process
2124	4012	WerFault.exe	csrss.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

Processes:

WerFault.exe

pid	process
2124	WerFault.exe
2124	WerFault.exe
2124	WerFault.exe
2124	WerFault.exe
2124	WerFault.exe
2124	WerFault.exe
2124	WerFault.exe
2124	WerFault.exe
2124	WerFault.exe
2124	WerFault.exe
2124	WerFault.exe
2124	WerFault.exe
2124	WerFault.exe
2124	WerFault.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

WerFault.exe

description pid process

Token: SeRestorePrivilege 2124 WerFault.exe
Token: SeBackupPrivilege 2124 WerFault.exe
Token: SeDebugPrivilege 2124 WerFault.exe

description	pid	process
Token: SeRestorePrivilege	2124	WerFault.exe
Token: SeBackupPrivilege	2124	WerFault.exe
Token: SeDebugPrivilege	2124	WerFault.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e.exe

description	pid	process	target process
PID 1840 wrote to memory of 4012	1840	25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e.exe	csrss.exe
PID 1840 wrote to memory of 4012	1840	25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e.exe	csrss.exe
PID 1840 wrote to memory of 4012	1840	25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e.exe	csrss.exe

C:\Users\Admin\AppData\Local\Temp\25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e.exe
"C:\Users\Admin\AppData\Local\Temp\25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1840
- C:\Windows\15075354021841\csrss.exe
  C:\Windows\15075354021841\csrss.exe
  2⤵
  - Executes dropped EXE
  - Windows security modification
  - Drops file in Program Files directory
  PID:4012
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4012 -s 1288
    3⤵
    - Program crash
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2124

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Disabling Security Tools

Modify Registry

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\15075354021841\csrss.exe

MD5
dd1aa660f2f24368dd58c5ce7a709b6c

SHA1
a54d435a04d3e883b1773d1c8d439dc95628fa07

SHA256
25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e

SHA512
a86738a5fd7915f3fbd9ddc8b5c3e01a936074749b7e8d14ceb91defef6657b5e5c1fc76fc6461b86424add2099c14b90c88b7b84de53928404562f2148b16b5

Download Submit
C:\Windows\15075354021841\csrss.exe

MD5
dd1aa660f2f24368dd58c5ce7a709b6c

SHA1
a54d435a04d3e883b1773d1c8d439dc95628fa07

SHA256
25f867b8065165d7876adb29673ac78be2a731ae82b9ea57eb54ba6479bc642e

SHA512
a86738a5fd7915f3fbd9ddc8b5c3e01a936074749b7e8d14ceb91defef6657b5e5c1fc76fc6461b86424add2099c14b90c88b7b84de53928404562f2148b16b5

Download Submit
memory/1840-114-0x00000000004E0000-0x000000000058E000-memory.dmp

Filesize
696KB

Download
memory/1840-115-0x0000000000400000-0x00000000004D2000-memory.dmp

Filesize
840KB

Download
memory/4012-116-0x0000000000000000-mapping.dmp

Download
memory/4012-119-0x00000000001D0000-0x00000000001F3000-memory.dmp

Filesize
140KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads