gurcu | 645e274fec3723d065308f9b16b33392ed7f51fbd5ffc3c00806c2efafb08b65

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 family
gurcu
Gurcu, WhiteSnake
Gurcu aka WhiteSnake 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 1 IoCs

resource	yara_rule
behavioral2/memory/2316-10-0x0000000000420000-0x0000000000440000-memory.dmp	family_redline

Redline family
redline

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2040 set thread context of 2316	2040	Start.exe	82

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
2316	Start.exe
2316	Start.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2316	Start.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2040 wrote to memory of 2316	2040	Start.exe	82
PID 2040 wrote to memory of 2316	2040	Start.exe	82
PID 2040 wrote to memory of 2316	2040	Start.exe	82
PID 2040 wrote to memory of 2316	2040	Start.exe	82
PID 2040 wrote to memory of 2316	2040	Start.exe	82
PID 2040 wrote to memory of 2316	2040	Start.exe	82
PID 2040 wrote to memory of 2316	2040	Start.exe	82
PID 2040 wrote to memory of 2316	2040	Start.exe	82

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:2040
- 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:2316

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

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\Start.exe.log

Filesize
1KB

MD5
b5291f3dcf2c13784e09a057f2e43d13

SHA1
fbb72f4b04269e0d35b1d9c29d02d63dbc7ad07e

SHA256
ad995b51344d71019f96fc3a424de00256065daad8595ff599f6849c87ae75ce

SHA512
11c89caac425bccaa24e2bb24c6f2b4e6d6863278bf8a5304a42bb44475b08ca586e09143e7d5b14db7f1cd9adacd5358769e0d999dc348073431031067bd4d4

Download Submit
memory/2040-5-0x0000000074970000-0x0000000075120000-memory.dmp

Filesize
7.7MB

Download
memory/2040-2-0x0000000005790000-0x0000000005D34000-memory.dmp

Filesize
5.6MB

Download
memory/2040-1-0x0000000000700000-0x0000000000750000-memory.dmp

Filesize
320KB

Download
memory/2040-4-0x00000000052E0000-0x00000000052EA000-memory.dmp

Filesize
40KB

Download
memory/2040-0-0x000000007497E000-0x000000007497F000-memory.dmp

Filesize
4KB

Download
memory/2040-6-0x0000000005620000-0x0000000005696000-memory.dmp

Filesize
472KB

Download
memory/2040-7-0x0000000005370000-0x000000000538E000-memory.dmp

Filesize
120KB

Download
memory/2040-13-0x0000000074970000-0x0000000075120000-memory.dmp

Filesize
7.7MB

Download
memory/2040-3-0x00000000051E0000-0x0000000005272000-memory.dmp

Filesize
584KB

Download
memory/2316-20-0x00000000056F0000-0x000000000573C000-memory.dmp

Filesize
304KB

Download
memory/2316-11-0x0000000004860000-0x00000000048C6000-memory.dmp

Filesize
408KB

Download
memory/2316-12-0x0000000074970000-0x0000000075120000-memory.dmp

Filesize
7.7MB

Download
memory/2316-14-0x0000000074970000-0x0000000075120000-memory.dmp

Filesize
7.7MB

Download
memory/2316-15-0x0000000074970000-0x0000000075120000-memory.dmp

Filesize
7.7MB

Download
memory/2316-16-0x0000000005BF0000-0x0000000006208000-memory.dmp

Filesize
6.1MB

Download
memory/2316-17-0x0000000005640000-0x0000000005652000-memory.dmp

Filesize
72KB

Download
memory/2316-18-0x0000000005770000-0x000000000587A000-memory.dmp

Filesize
1.0MB

Download
memory/2316-19-0x00000000056B0000-0x00000000056EC000-memory.dmp

Filesize
240KB

Download
memory/2316-10-0x0000000000420000-0x0000000000440000-memory.dmp

Filesize
128KB

Download

Analysis

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