guloader | 27d318fe5d1d8f02c39b6b82690e4be83eeb3f357618cbabd7d808a23924b277

General

Target

ea58a2d052aaee30b19a34048ce04066_JaffaCakes118.exe
Size

80KB
MD5

ea58a2d052aaee30b19a34048ce04066
SHA1

29cca773cb11097d127ba5ddb2d6ca69c462aa21
SHA256

27d318fe5d1d8f02c39b6b82690e4be83eeb3f357618cbabd7d808a23924b277
SHA512

da89be0fc56778b3a5a0d7efc66f51a38ef7de963e29c9e6fc6e73ce9af8972d818462720e5b017b214f6ddbc9d1d7e27213fa9273a425f2ec8365d4f5040e54
SSDEEP

1536:EV69BrIP08K0mkNjU42WGFAxUdw7sXVi:j7IP7TDhH2WNWw7Z

Score

10^/10

guloader discovery downloader guloader

Malware Config

Extracted

Family

guloader

C2

https://mwrc.ca/a/me_encrypted_3F1DDE0.bin

xor.base64

Signatures

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader

Guloader payload 1 IoCs

guloader

resource	yara_rule
behavioral1/memory/2964-2-0x0000000000260000-0x000000000026A000-memory.dmp	family_guloader

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2964	ea58a2d052aaee30b19a34048ce04066_JaffaCakes118.exe
2536	RegAsm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2964 set thread context of 2536	2964	ea58a2d052aaee30b19a34048ce04066_JaffaCakes118.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	ea58a2d052aaee30b19a34048ce04066_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1553.004

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8	RegAsm.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8\Blob = 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	RegAsm.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2964	ea58a2d052aaee30b19a34048ce04066_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2964	ea58a2d052aaee30b19a34048ce04066_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2964 wrote to memory of 2536	2964	ea58a2d052aaee30b19a34048ce04066_JaffaCakes118.exe	30
PID 2964 wrote to memory of 2536	2964	ea58a2d052aaee30b19a34048ce04066_JaffaCakes118.exe	30
PID 2964 wrote to memory of 2536	2964	ea58a2d052aaee30b19a34048ce04066_JaffaCakes118.exe	30
PID 2964 wrote to memory of 2536	2964	ea58a2d052aaee30b19a34048ce04066_JaffaCakes118.exe	30
PID 2964 wrote to memory of 2536	2964	ea58a2d052aaee30b19a34048ce04066_JaffaCakes118.exe	30
PID 2964 wrote to memory of 2536	2964	ea58a2d052aaee30b19a34048ce04066_JaffaCakes118.exe	30
PID 2964 wrote to memory of 2536	2964	ea58a2d052aaee30b19a34048ce04066_JaffaCakes118.exe	30
PID 2964 wrote to memory of 2536	2964	ea58a2d052aaee30b19a34048ce04066_JaffaCakes118.exe	30

C:\Users\Admin\AppData\Local\Temp\ea58a2d052aaee30b19a34048ce04066_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\ea58a2d052aaee30b19a34048ce04066_JaffaCakes118.exe"
1⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2964
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Users\Admin\AppData\Local\Temp\ea58a2d052aaee30b19a34048ce04066_JaffaCakes118.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Modifies system certificate store
  PID:2536

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Subvert Trust Controls

1

T1553

Install Root Certificate

1

T1553.004

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/2536-5-0x0000000077350000-0x00000000774F9000-memory.dmp

Filesize
1.7MB

Download
memory/2964-2-0x0000000000260000-0x000000000026A000-memory.dmp

Filesize
40KB

Download
memory/2964-3-0x0000000077351000-0x0000000077452000-memory.dmp

Filesize
1.0MB

Download
memory/2964-4-0x0000000077350000-0x00000000774F9000-memory.dmp

Filesize
1.7MB

Download
memory/2964-16-0x0000000000260000-0x000000000026A000-memory.dmp

Filesize
40KB

Download
memory/2964-17-0x0000000000260000-0x000000000026A000-memory.dmp

Filesize
40KB

Download

Analysis

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