guloader | 3ec257ac5b1594efa6862e7dfa6d4a4ed56f81ffb9e5320ce9dc95baaf9f00e1

General

Target

ff8d576d2a44ebd419da4cd03cd49ba6_JaffaCakes118.exe
Size

48KB
MD5

ff8d576d2a44ebd419da4cd03cd49ba6
SHA1

31de103753c826ed42883ab98daeeff443f12926
SHA256

3ec257ac5b1594efa6862e7dfa6d4a4ed56f81ffb9e5320ce9dc95baaf9f00e1
SHA512

ee719ac80d1b8a1b0bee99ad40aef23ec9a3bcb37f024eca902915209620624574256622782d1b8324d08e32bb4c30c8c04c0f17c52a0686819f5721e6b7de7a
SSDEEP

384:lMd/UDAlKJ+dfZhnISoz2w3z/heMLxgbbMBrTjeVTJ/8jd/wnNnUw0mgWbrwrC95:lk/kAEIlNE2o1LxnBXjeVTJUjJwolVF

Score

10^/10

guloader discovery downloader

Malware Config

Extracted

Family

guloader

C2

https://onedrive.live.com/download?cid=4C3F5C65A99DA195&resid=4C3F5C65A99DA195%21164&authkey=ALVVLt1t0mIlYck

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	ff8d576d2a44ebd419da4cd03cd49ba6_JaffaCakes118.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	ff8d576d2a44ebd419da4cd03cd49ba6_JaffaCakes118.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1988	ff8d576d2a44ebd419da4cd03cd49ba6_JaffaCakes118.exe
2500	ff8d576d2a44ebd419da4cd03cd49ba6_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1988 set thread context of 2500	1988	ff8d576d2a44ebd419da4cd03cd49ba6_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	ff8d576d2a44ebd419da4cd03cd49ba6_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ff8d576d2a44ebd419da4cd03cd49ba6_JaffaCakes118.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1988	ff8d576d2a44ebd419da4cd03cd49ba6_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1988	ff8d576d2a44ebd419da4cd03cd49ba6_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1988 wrote to memory of 2500	1988	ff8d576d2a44ebd419da4cd03cd49ba6_JaffaCakes118.exe	30
PID 1988 wrote to memory of 2500	1988	ff8d576d2a44ebd419da4cd03cd49ba6_JaffaCakes118.exe	30
PID 1988 wrote to memory of 2500	1988	ff8d576d2a44ebd419da4cd03cd49ba6_JaffaCakes118.exe	30
PID 1988 wrote to memory of 2500	1988	ff8d576d2a44ebd419da4cd03cd49ba6_JaffaCakes118.exe	30
PID 1988 wrote to memory of 2500	1988	ff8d576d2a44ebd419da4cd03cd49ba6_JaffaCakes118.exe	30

C:\Users\Admin\AppData\Local\Temp\ff8d576d2a44ebd419da4cd03cd49ba6_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\ff8d576d2a44ebd419da4cd03cd49ba6_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:1988
- C:\Users\Admin\AppData\Local\Temp\ff8d576d2a44ebd419da4cd03cd49ba6_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\ff8d576d2a44ebd419da4cd03cd49ba6_JaffaCakes118.exe"
  2⤵
  - Checks QEMU agent file
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:2500

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\CabC39F.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\TarC3C1.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
memory/1988-2-0x0000000000760000-0x0000000000769000-memory.dmp

Filesize
36KB

Download
memory/1988-3-0x0000000076DF1000-0x0000000076EF2000-memory.dmp

Filesize
1.0MB

Download
memory/1988-7-0x0000000076DF0000-0x0000000076F99000-memory.dmp

Filesize
1.7MB

Download
memory/1988-6-0x0000000000760000-0x0000000000769000-memory.dmp

Filesize
36KB

Download
memory/1988-169-0x0000000076DF0000-0x0000000076F99000-memory.dmp

Filesize
1.7MB

Download
memory/2500-8-0x0000000076DF0000-0x0000000076F99000-memory.dmp

Filesize
1.7MB

Download
memory/2500-4-0x0000000000400000-0x0000000000553000-memory.dmp

Filesize
1.3MB

Download
memory/2500-269-0x0000000000400000-0x0000000000553000-memory.dmp

Filesize
1.3MB

Download

Analysis

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