guloader | 16b2e1bd0d733a94f7547fd4b7c15ea3ed5d9978c611fe805199f920dda3dc61

General

Target

Modregninger.exe
Size

600KB
MD5

41b7102695b71b483617e5817576e6ea
SHA1

911f170a3fdcaf086141e9bbe811cb4d15f59b51
SHA256

16b2e1bd0d733a94f7547fd4b7c15ea3ed5d9978c611fe805199f920dda3dc61
SHA512

9e08b3b3437ec0106f809322de2e538f2d0defe934ae04815c2f6fdd23272b9b9498f7b565372dbe16769234441a6d2a6711c4ce90f7b9ee08f97347fbd0abd8
SSDEEP

12288:/22t93y7NMalZE1lbwLCnPLPr30IRiMj906OL:/22tZEFZE1lbwLgPLr3Q6O

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

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

Loads dropped DLL 1 IoCs

pid	Process
1972	Modregninger.exe

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

Web Service

T1102

flow	ioc
3	drive.google.com
4	drive.google.com

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\nonsurgically\skmbillede.smr	Modregninger.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2256	Modregninger.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1972	Modregninger.exe
2256	Modregninger.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1972 set thread context of 2256	1972	Modregninger.exe	30

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Fljtenists.ini	Modregninger.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	Modregninger.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Modregninger.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
2256	Modregninger.exe
2256	Modregninger.exe
2256	Modregninger.exe
2256	Modregninger.exe
2256	Modregninger.exe
2256	Modregninger.exe
2256	Modregninger.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1972	Modregninger.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1972 wrote to memory of 2256	1972	Modregninger.exe	30
PID 1972 wrote to memory of 2256	1972	Modregninger.exe	30
PID 1972 wrote to memory of 2256	1972	Modregninger.exe	30
PID 1972 wrote to memory of 2256	1972	Modregninger.exe	30
PID 1972 wrote to memory of 2256	1972	Modregninger.exe	30
PID 1972 wrote to memory of 2256	1972	Modregninger.exe	30

C:\Users\Admin\AppData\Local\Temp\Modregninger.exe
"C:\Users\Admin\AppData\Local\Temp\Modregninger.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1972
- C:\Users\Admin\AppData\Local\Temp\Modregninger.exe
  "C:\Users\Admin\AppData\Local\Temp\Modregninger.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:2256

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

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\nsjD5A.tmp\System.dll

Filesize
11KB

MD5
3f176d1ee13b0d7d6bd92e1c7a0b9bae

SHA1
fe582246792774c2c9dd15639ffa0aca90d6fd0b

SHA256
fa4ab1d6f79fd677433a31ada7806373a789d34328da46ccb0449bbf347bd73e

SHA512
0a69124819b7568d0dea4e9e85ce8fe61c7ba697c934e3a95e2dcfb9f252b1d9da7faf8774b6e8efd614885507acc94987733eba09a2f5e7098b774dfc8524b6

Download Submit
memory/1972-41-0x0000000002B10000-0x000000000360C000-memory.dmp

Filesize
11.0MB

Download
memory/1972-11-0x0000000002B10000-0x000000000360C000-memory.dmp

Filesize
11.0MB

Download
memory/1972-12-0x0000000002B10000-0x000000000360C000-memory.dmp

Filesize
11.0MB

Download
memory/1972-14-0x0000000077440000-0x00000000775E9000-memory.dmp

Filesize
1.7MB

Download
memory/1972-13-0x0000000077441000-0x0000000077542000-memory.dmp

Filesize
1.0MB

Download
memory/2256-42-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2256-44-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2256-40-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2256-16-0x0000000077440000-0x00000000775E9000-memory.dmp

Filesize
1.7MB

Download
memory/2256-15-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2256-43-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2256-45-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2256-35-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2256-47-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2256-46-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2256-49-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2256-48-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2256-51-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2256-50-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2256-52-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2256-59-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download

Analysis

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