guloader | 6876aa707adeeffbe08d86d26c6cf48b8d77d46c96f8ace28a523b0a846db38f

General

Target

f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe
Size

40KB
MD5

f8b85f347a71a59f7f00ae7532f2c18b
SHA1

b6550c39499503580dfa3f495dfd6676bb59bae9
SHA256

6876aa707adeeffbe08d86d26c6cf48b8d77d46c96f8ace28a523b0a846db38f
SHA512

af4dd63b8b0d2ff4648b2860f39750a3f8255b0f40f13a7547d85765b2e8d2968927f510654511416f17c7e98d621f78e0843d822b6060bba9affb4d6d55262e
SSDEEP

384:VKR02k9t1VvgETLVj34wFWU9XqVCfSPqCg8eQ3HY5W8X23:VKRFk9TTLGwtCCfgg8eQ3HGX2

Score

10^/10

guloader discovery downloader

Malware Config

Extracted

Family

guloader

C2

https://onedrive.live.com/download?cid=4C3F5C65A99DA195&resid=4C3F5C65A99DA195%21195&authkey=AJB0IkxVDYstJY0

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	f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1216	f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe
2540	f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1216 set thread context of 2540	1216	f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe	29

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	f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1216	f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1216	f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1216 wrote to memory of 2540	1216	f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe	29
PID 1216 wrote to memory of 2540	1216	f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe	29
PID 1216 wrote to memory of 2540	1216	f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe	29
PID 1216 wrote to memory of 2540	1216	f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe	29
PID 1216 wrote to memory of 2540	1216	f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe	29

C:\Users\Admin\AppData\Local\Temp\f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe"
1⤵
- Checks QEMU agent file
- 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:1216
- C:\Users\Admin\AppData\Local\Temp\f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe"
  2⤵
  - Checks QEMU agent file
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:2540

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\Temp\Cab7A31.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar7A44.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
memory/1216-2-0x00000000003C0000-0x00000000003C9000-memory.dmp

Filesize
36KB

Download
memory/1216-3-0x0000000077BE1000-0x0000000077CE2000-memory.dmp

Filesize
1.0MB

Download
memory/1216-7-0x00000000003C0000-0x00000000003C9000-memory.dmp

Filesize
36KB

Download
memory/1216-4-0x0000000077BE0000-0x0000000077D89000-memory.dmp

Filesize
1.7MB

Download
memory/2540-8-0x0000000077BE0000-0x0000000077D89000-memory.dmp

Filesize
1.7MB

Download
memory/2540-5-0x0000000000400000-0x0000000000553000-memory.dmp

Filesize
1.3MB

Download
memory/2540-385-0x0000000000400000-0x0000000000553000-memory.dmp

Filesize
1.3MB

Download

Analysis

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