gurcu | b371eae7b55688d307b653759c2d4ddfe3672eb7b5567bcfa9c3f75f5c6d6255

General

Target

Start.exe
Size

301KB
MD5

9a0e31ffbe7ecc3a2a6f968b2a8d5567
SHA1

e88e76fe96616649d2558923afe457ce3b1976ec
SHA256

b371eae7b55688d307b653759c2d4ddfe3672eb7b5567bcfa9c3f75f5c6d6255
SHA512

db64b27997e5305473572ee8a60573032e51fbfbdc48670d9adef8ba23c81e8845d073383299c94f87a0100c74ca0e6968b9f468fc46e31e221a71ad69a32749
SSDEEP

6144:S1eFfHQTBVVzJxmKg/R3xNJyZsMoONeL1Ip4w3qm:gPBV9JxmKE7JfVONUGqm

Score

10^/10

gurcu redline discovery infostealer stealer

Malware Config

Extracted

Family

redline

C2

65.108.29.210:21638

Attributes

auth_value
ad39d6a8ea7823f2a92f57ebaa4c98a5

Signatures

Gurcu, WhiteSnake
Gurcu is a malware stealer written in C#.
stealer gurcu
RedLine
RedLine Stealer is a malware family written in C#, first appearing in early 2020.
infostealer redline

RedLine payload 5 IoCs

resource	yara_rule
behavioral1/memory/2228-13-0x0000000000400000-0x0000000000420000-memory.dmp	family_redline
behavioral1/memory/2228-9-0x0000000000400000-0x0000000000420000-memory.dmp	family_redline
behavioral1/memory/2228-15-0x0000000000400000-0x0000000000420000-memory.dmp	family_redline
behavioral1/memory/2228-7-0x0000000000400000-0x0000000000420000-memory.dmp	family_redline
behavioral1/memory/2228-18-0x0000000000400000-0x0000000000420000-memory.dmp	family_redline

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2100 set thread context of 2228	2100	Start.exe	30

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	Start.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Start.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	Start.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	Start.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2228	Start.exe
2228	Start.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2228	Start.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2100 wrote to memory of 2228	2100	Start.exe	30
PID 2100 wrote to memory of 2228	2100	Start.exe	30
PID 2100 wrote to memory of 2228	2100	Start.exe	30
PID 2100 wrote to memory of 2228	2100	Start.exe	30
PID 2100 wrote to memory of 2228	2100	Start.exe	30
PID 2100 wrote to memory of 2228	2100	Start.exe	30
PID 2100 wrote to memory of 2228	2100	Start.exe	30
PID 2100 wrote to memory of 2228	2100	Start.exe	30
PID 2100 wrote to memory of 2228	2100	Start.exe	30

C:\Users\Admin\AppData\Local\Temp\Start.exe
"C:\Users\Admin\AppData\Local\Temp\Start.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2100
- C:\Users\Admin\AppData\Local\Temp\Start.exe
  "C:\Users\Admin\AppData\Local\Temp\Start.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2228

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2100-0-0x0000000074B2E000-0x0000000074B2F000-memory.dmp

Filesize
4KB

Download
memory/2100-1-0x0000000001390000-0x00000000013E0000-memory.dmp

Filesize
320KB

Download
memory/2100-2-0x0000000074B20000-0x000000007520E000-memory.dmp

Filesize
6.9MB

Download
memory/2100-19-0x0000000074B20000-0x000000007520E000-memory.dmp

Filesize
6.9MB

Download
memory/2228-9-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2228-13-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2228-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2228-15-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2228-7-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2228-5-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2228-3-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2228-18-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2228-20-0x0000000074B20000-0x000000007520E000-memory.dmp

Filesize
6.9MB

Download
memory/2228-21-0x0000000074B20000-0x000000007520E000-memory.dmp

Filesize
6.9MB

Download

Analysis

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