guloader | 3cbf0aeafec688023948cad7bf7475270ba9cb1acb0078cf1a9d6288f2751a20

General

Target

f4e5664ffb8921e5d25fd3b77c5bd9d4_JaffaCakes118.exe
Size

84KB
MD5

f4e5664ffb8921e5d25fd3b77c5bd9d4
SHA1

b3933463d09e776f5c210b07d61dcb8c87c6f32e
SHA256

3cbf0aeafec688023948cad7bf7475270ba9cb1acb0078cf1a9d6288f2751a20
SHA512

548fb8fa3294fc7800440279299f3448e743f33bdbd280a64935ce98001340cf059bdd9fd4ec5dff8709bcf8d2ea30122fb41e54a161393fe024b82aceb0c96d
SSDEEP

768:o9qOgtWmKPSeVnQR94uKgAjQc8iXA+hb6+cJ+WLyBMDP0bi8vz:QqOgEmKPvVng9xFAjr8yjheX+2fDP0F

Score

10^/10

guloader discovery downloader persistence

Malware Config

Extracted

Family

guloader

C2

https://onedrive.live.com/download?cid=BE2C31366E78C5BC&resid=BE2C31366E78C5BC%2128846&authkey=ALRaeD-M6cBjrQs

xor.base64

Signatures

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

Checks QEMU agent file 2 TTPs 2 IoCs

Checks presence of QEMU agent, possibly to detect virtualization.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	f4e5664ffb8921e5d25fd3b77c5bd9d4_JaffaCakes118.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	f4e5664ffb8921e5d25fd3b77c5bd9d4_JaffaCakes118.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\Skovtroldens4 = "C:\\Users\\Admin\\AppData\\Local\\Temp\\sydbo\\Fonologiernes.vbs"	f4e5664ffb8921e5d25fd3b77c5bd9d4_JaffaCakes118.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1924	f4e5664ffb8921e5d25fd3b77c5bd9d4_JaffaCakes118.exe
2708	f4e5664ffb8921e5d25fd3b77c5bd9d4_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1924 set thread context of 2708	1924	f4e5664ffb8921e5d25fd3b77c5bd9d4_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	f4e5664ffb8921e5d25fd3b77c5bd9d4_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f4e5664ffb8921e5d25fd3b77c5bd9d4_JaffaCakes118.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1924	f4e5664ffb8921e5d25fd3b77c5bd9d4_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1924	f4e5664ffb8921e5d25fd3b77c5bd9d4_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1924 wrote to memory of 2708	1924	f4e5664ffb8921e5d25fd3b77c5bd9d4_JaffaCakes118.exe	30
PID 1924 wrote to memory of 2708	1924	f4e5664ffb8921e5d25fd3b77c5bd9d4_JaffaCakes118.exe	30
PID 1924 wrote to memory of 2708	1924	f4e5664ffb8921e5d25fd3b77c5bd9d4_JaffaCakes118.exe	30
PID 1924 wrote to memory of 2708	1924	f4e5664ffb8921e5d25fd3b77c5bd9d4_JaffaCakes118.exe	30
PID 1924 wrote to memory of 2708	1924	f4e5664ffb8921e5d25fd3b77c5bd9d4_JaffaCakes118.exe	30

C:\Users\Admin\AppData\Local\Temp\f4e5664ffb8921e5d25fd3b77c5bd9d4_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f4e5664ffb8921e5d25fd3b77c5bd9d4_JaffaCakes118.exe"
1⤵
- Checks QEMU agent file
- Adds Run key to start application
- 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:1924
- C:\Users\Admin\AppData\Local\Temp\f4e5664ffb8921e5d25fd3b77c5bd9d4_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\f4e5664ffb8921e5d25fd3b77c5bd9d4_JaffaCakes118.exe"
  2⤵
  - Checks QEMU agent file
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:2708

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\CabCEC6.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\TarCEE8.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
memory/1924-2-0x0000000000420000-0x000000000042D000-memory.dmp

Filesize
52KB

Download
memory/1924-3-0x00000000770D1000-0x00000000771D2000-memory.dmp

Filesize
1.0MB

Download
memory/1924-4-0x00000000770D0000-0x0000000077279000-memory.dmp

Filesize
1.7MB

Download
memory/1924-7-0x0000000000420000-0x000000000042D000-memory.dmp

Filesize
52KB

Download
memory/2708-5-0x0000000000400000-0x0000000000553000-memory.dmp

Filesize
1.3MB

Download
memory/2708-8-0x00000000770D0000-0x0000000077279000-memory.dmp

Filesize
1.7MB

Download
memory/2708-180-0x0000000000400000-0x0000000000553000-memory.dmp

Filesize
1.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads