guloader | f1b6f735c651a28ecb97d4b9e21adc5d79ebed5b2686482f58ae33df3f13492d

General

Target

Cubistic.exe
Size

744KB
MD5

615dbc6bbf1babd9d064ec9d24b211b1
SHA1

5465ddcd9aa36db67f3a29607f86c4df6989d026
SHA256

f1b6f735c651a28ecb97d4b9e21adc5d79ebed5b2686482f58ae33df3f13492d
SHA512

3a0d4769020d220676907a71d8fea5e2d61ca2e6d3ae79be14a7b4b5a99c78b03c044619e3c55c8a1e76f660cee26638932fd846ec580f8ad72b551d41cfdb04
SSDEEP

12288:lF9eqV6zZSsoOa/xy38SeD83S1vKZbXvOIxnE8UML789zUO9vVOI0emBmf:Zx6SsoOa/A3lRsUbbxnlGUOdb0emBmf

Score

10^/10

guloader vipkeylogger discovery downloader keylogger stealer

Malware Config

Extracted

Family

vipkeylogger

C2

https://api.telegram.org/bot7618867847:AAF14vnGvkJJYcxLyMVdR3OZPzd4TQzD_OY/sendMessage?chat_id=6070006284

Signatures

Guloader family
guloader
Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader
VIPKeylogger
VIPKeylogger is a keylogger and infostealer written in C# and it resembles SnakeKeylogger that was found in 2020.
stealer keylogger vipkeylogger
Vipkeylogger family
vipkeylogger

Loads dropped DLL 2 IoCs

pid	Process
2172	Cubistic.exe
2172	Cubistic.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
5	drive.google.com
3	drive.google.com

Looks up external IP address via web service 3 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
16	checkip.dyndns.org
18	reallyfreegeoip.org
19	reallyfreegeoip.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
1564	Cubistic.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2172	Cubistic.exe
1564	Cubistic.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Unelaborated.non	Cubistic.exe
File opened for modification	C:\Program Files (x86)\Common Files\bedvelsens\Reaccelerates.ske	Cubistic.exe
File opened for modification	C:\Program Files (x86)\Common Files\rhesusbarnet\teenfully.bra	Cubistic.exe
File opened for modification	C:\Program Files (x86)\Common Files\infarkt.pla	Cubistic.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\rothesay\Fallenternes.con	Cubistic.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1564	Cubistic.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2172	Cubistic.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1564	Cubistic.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2172 wrote to memory of 1564	2172	Cubistic.exe	29
PID 2172 wrote to memory of 1564	2172	Cubistic.exe	29
PID 2172 wrote to memory of 1564	2172	Cubistic.exe	29
PID 2172 wrote to memory of 1564	2172	Cubistic.exe	29
PID 2172 wrote to memory of 1564	2172	Cubistic.exe	29

C:\Users\Admin\AppData\Local\Temp\Cubistic.exe
"C:\Users\Admin\AppData\Local\Temp\Cubistic.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Program Files directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2172
- C:\Users\Admin\AppData\Local\Temp\Cubistic.exe
  "C:\Users\Admin\AppData\Local\Temp\Cubistic.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1564

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Public\Pictures\fedtlderstvles.lnk

Filesize
916B

MD5
3c0ea4d3e259fac27cf288a6951d355e

SHA1
67cf8514c27a54620b07f17dd71c5f1fe7607d28

SHA256
8d25fc09c4a5f3df79a2885ced47fe7221646b8621854bcb85de7629cd135b4a

SHA512
c418a78eef7433c9022d43903a1a21dbb9790bd4b0829980e63e93e58442c2316cfeef6f28dea5ee2b4748db9a4a15ab2838ae4ca07ebd7f3c4d7cb9f933d78b

Download Submit
\Users\Admin\AppData\Local\Temp\nsjFC98.tmp\System.dll

Filesize
11KB

MD5
cf85183b87314359488b850f9e97a698

SHA1
6b6c790037eec7ebea4d05590359cb4473f19aea

SHA256
3b6a5cb2a3c091814fce297c04fb677f72732fb21615102c62a195fdc2e7dfac

SHA512
fe484b3fc89aeed3a6b71b90b90ea11a787697e56be3077154b6ddc2646850f6c38589ed422ff792e391638a80a778d33f22e891e76b5d65896c6fb4696a2c3b

Download Submit
memory/1564-313-0x00000000014D0000-0x00000000033AE000-memory.dmp

Filesize
30.9MB

Download
memory/1564-314-0x0000000077310000-0x00000000774B9000-memory.dmp

Filesize
1.7MB

Download
memory/1564-315-0x0000000000460000-0x00000000014C2000-memory.dmp

Filesize
16.4MB

Download
memory/1564-340-0x0000000000460000-0x00000000014C2000-memory.dmp

Filesize
16.4MB

Download
memory/1564-341-0x00000000014D0000-0x00000000033AE000-memory.dmp

Filesize
30.9MB

Download
memory/1564-343-0x0000000000460000-0x00000000004AA000-memory.dmp

Filesize
296KB

Download
memory/2172-309-0x0000000002500000-0x00000000043DE000-memory.dmp

Filesize
30.9MB

Download
memory/2172-310-0x0000000002500000-0x00000000043DE000-memory.dmp

Filesize
30.9MB

Download
memory/2172-311-0x0000000077311000-0x0000000077412000-memory.dmp

Filesize
1.0MB

Download
memory/2172-312-0x0000000077310000-0x00000000774B9000-memory.dmp

Filesize
1.7MB

Download

Analysis

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