purecrypter | 3b6d60b69e3438ca5aaad8edf8b87f8c39f72803aa3c90a929aff5239d998333

General

Target

Uarngd.exe
Size

7KB
MD5

51b95537e2f88be4e97ca30fd565c6a2
SHA1

3c19c4f72b3737b8c365462b578e46a681990470
SHA256

3b6d60b69e3438ca5aaad8edf8b87f8c39f72803aa3c90a929aff5239d998333
SHA512

d177cfdbec6511d7fce4911b0e2b4d3581bb625d02df2ced2ab3cf774873cae1748f796fa939b269c1d0c267a63f89d82c51784c183c067cd9f9c6a0f89e9c39
SSDEEP

96:0+10kTSeg3MLEmVJsdtldCDxLGP8ZY7ZMtblNb6k2wImQgJtXstMtzNt:0+nWeg3SXJ45C5GPGldHbIfgzXEMH

Score

10^/10

purecrypter snakekeylogger downloader keylogger loader persistence stealer

Malware Config

Extracted

Family

snakekeylogger

C2

https://api.telegram.org/bot5497972920:AAHqqS9EfkxnwYz3pQtCWef33URevfy5tRk/sendMessage?chat_id=1653988628

Signatures

Detect PureCrypter injector 1 IoCs

loader

Processes:

resource	yara_rule
behavioral1/memory/1700-56-0x00000000062A0000-0x0000000006510000-memory.dmp	family_purecrypter

PureCrypter
PureCrypter is a .NET malware loader first seen in early 2021.
loader downloader purecrypter
Snake Keylogger
Keylogger and Infostealer first seen in November 2020.
stealer keylogger snakekeylogger

Snake Keylogger payload 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1868-68-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1868-66-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1868-70-0x00000000004207DE-mapping.dmp	family_snakekeylogger
behavioral1/memory/1868-69-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1868-72-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1868-74-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

Uarngd.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\Fapkq = "\"C:\\Users\\Admin\\AppData\\Roaming\\Icrqbdo\\Fapkq.exe\""	Uarngd.exe

Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

6 checkip.dyndns.org
Suspicious use of SetThreadContext 1 IoCs

Processes:

Uarngd.exe

description pid process target process

PID 1700 set thread context of 1868 1700 Uarngd.exe Uarngd.exe
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

Processes:

WerFault.exe

pid pid_target process target process

828 1868 WerFault.exe Uarngd.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

powershell.exeUarngd.exe

pid process

320 powershell.exe
1868 Uarngd.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

Uarngd.exepowershell.exeUarngd.exe

description pid process

Token: SeDebugPrivilege 1700 Uarngd.exe
Token: SeDebugPrivilege 320 powershell.exe
Token: SeDebugPrivilege 1868 Uarngd.exe

flow	ioc
6	checkip.dyndns.org

description	pid	process	target process
PID 1700 set thread context of 1868	1700	Uarngd.exe	Uarngd.exe

pid	pid_target	process	target process
828	1868	WerFault.exe	Uarngd.exe

pid	process
320	powershell.exe
1868	Uarngd.exe

description	pid	process
Token: SeDebugPrivilege	1700	Uarngd.exe
Token: SeDebugPrivilege	320	powershell.exe
Token: SeDebugPrivilege	1868	Uarngd.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

Uarngd.exeUarngd.exe

description	pid	process	target process
PID 1700 wrote to memory of 320	1700	Uarngd.exe	powershell.exe
PID 1700 wrote to memory of 320	1700	Uarngd.exe	powershell.exe
PID 1700 wrote to memory of 320	1700	Uarngd.exe	powershell.exe
PID 1700 wrote to memory of 320	1700	Uarngd.exe	powershell.exe
PID 1700 wrote to memory of 1868	1700	Uarngd.exe	Uarngd.exe
PID 1700 wrote to memory of 1868	1700	Uarngd.exe	Uarngd.exe
PID 1700 wrote to memory of 1868	1700	Uarngd.exe	Uarngd.exe
PID 1700 wrote to memory of 1868	1700	Uarngd.exe	Uarngd.exe
PID 1700 wrote to memory of 1868	1700	Uarngd.exe	Uarngd.exe
PID 1700 wrote to memory of 1868	1700	Uarngd.exe	Uarngd.exe
PID 1700 wrote to memory of 1868	1700	Uarngd.exe	Uarngd.exe
PID 1700 wrote to memory of 1868	1700	Uarngd.exe	Uarngd.exe
PID 1700 wrote to memory of 1868	1700	Uarngd.exe	Uarngd.exe
PID 1868 wrote to memory of 828	1868	Uarngd.exe	WerFault.exe
PID 1868 wrote to memory of 828	1868	Uarngd.exe	WerFault.exe
PID 1868 wrote to memory of 828	1868	Uarngd.exe	WerFault.exe
PID 1868 wrote to memory of 828	1868	Uarngd.exe	WerFault.exe

C:\Users\Admin\AppData\Local\Temp\Uarngd.exe
"C:\Users\Admin\AppData\Local\Temp\Uarngd.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1700

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:320

C:\Users\Admin\AppData\Local\Temp\Uarngd.exe
C:\Users\Admin\AppData\Local\Temp\Uarngd.exe
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1868

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1868 -s 1144
3⤵
- Program crash
PID:828

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/320-57-0x0000000000000000-mapping.dmp

Download
memory/320-59-0x000000006F8A0000-0x000000006FE4B000-memory.dmp

Filesize
5.7MB

Download
memory/320-60-0x000000006F8A0000-0x000000006FE4B000-memory.dmp

Filesize
5.7MB

Download
memory/320-61-0x000000006F8A0000-0x000000006FE4B000-memory.dmp

Filesize
5.7MB

Download
memory/828-76-0x0000000000000000-mapping.dmp

Download
memory/1700-55-0x0000000075FF1000-0x0000000075FF3000-memory.dmp

Filesize
8KB

Download
memory/1700-56-0x00000000062A0000-0x0000000006510000-memory.dmp

Filesize
2.4MB

Download
memory/1700-62-0x0000000004F00000-0x0000000004F4A000-memory.dmp

Filesize
296KB

Download
memory/1700-54-0x0000000000840000-0x0000000000848000-memory.dmp

Filesize
32KB

Download
memory/1868-63-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1868-66-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1868-64-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1868-70-0x00000000004207DE-mapping.dmp

Download
memory/1868-69-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1868-72-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1868-74-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1868-68-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads