guloader | 790f423f015c7a47de1d62c5fa4148c8b491209b22a272cfff42b8cd7e61e0ee

General

Target

outrap.exe
Size

535KB
MD5

89d011504235c0cc1b7877896e3bb44a
SHA1

33338ad41cfa61c6ba9459e1eb0bcf6a4a9dafad
SHA256

098669c0fc8d2b3e9cae033e8bd927ff051bf128240bd6d5dce6e7c02ffda5ce
SHA512

9bff43aeaebe9210f9419dcd0851d73d09ab5d509b1bb63cb2964eba107c89c6582332ed3ef61b3a84913ba7cfe2932d7324cbf4f91d268845d3ff112a5ea0ae
SSDEEP

12288:DMhuj/MHzCBAFfCw6Y2Tp0xLz/linh0s+ZHmkHN3HiPCpfBVx:IW0HzCBsCVG/le0HnHpHiwV

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

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

Loads dropped DLL 2 IoCs

pid	Process
2748	outrap.exe
2748	outrap.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

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
884	outrap.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2748	outrap.exe
884	outrap.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2748 set thread context of 884	2748	outrap.exe	30

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\Trnregimenternes\totalsanerende.Obs202	outrap.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	outrap.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	outrap.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
884	outrap.exe
884	outrap.exe
884	outrap.exe
884	outrap.exe
884	outrap.exe
884	outrap.exe
884	outrap.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2748	outrap.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2748 wrote to memory of 884	2748	outrap.exe	30
PID 2748 wrote to memory of 884	2748	outrap.exe	30
PID 2748 wrote to memory of 884	2748	outrap.exe	30
PID 2748 wrote to memory of 884	2748	outrap.exe	30
PID 2748 wrote to memory of 884	2748	outrap.exe	30
PID 2748 wrote to memory of 884	2748	outrap.exe	30

C:\Users\Admin\AppData\Local\Temp\outrap.exe
"C:\Users\Admin\AppData\Local\Temp\outrap.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2748
- C:\Users\Admin\AppData\Local\Temp\outrap.exe
  "C:\Users\Admin\AppData\Local\Temp\outrap.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:884

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

C:\Users\Admin\Music\incinerations.lnk

Filesize
786B

MD5
8beb31457eb468a14351c2873169fcaa

SHA1
cf68377dff7ae294e464ef5fc913b2de195d51ab

SHA256
4ffba9f5e0b15d0689e6412ebc9d315e926b5b70490bc34fa829a8631041da91

SHA512
e0661077039088bb1cd97f19ada8052703244750ffcf2b22d0d839751b50f799c12233bd915d4d72d520d9478b17d0ef743c66532b00b50e7ca39dbed655bf24

Download Submit
\Users\Admin\AppData\Local\Temp\nso7F7D.tmp\System.dll

Filesize
11KB

MD5
cf85183b87314359488b850f9e97a698

SHA1
6b6c790037eec7ebea4d05590359cb4473f19aea

SHA256
3b6a5cb2a3c091814fce297c04fb677f72732fb21615102c62a195fdc2e7dfac

SHA512
fe484b3fc89aeed3a6b71b90b90ea11a787697e56be3077154b6ddc2646850f6c38589ed422ff792e391638a80a778d33f22e891e76b5d65896c6fb4696a2c3b

Download Submit
memory/884-435-0x0000000077200000-0x00000000773A9000-memory.dmp

Filesize
1.7MB

Download
memory/884-434-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/884-457-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/884-458-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/884-464-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2748-429-0x0000000003BC0000-0x0000000005CB6000-memory.dmp

Filesize
33.0MB

Download
memory/2748-430-0x0000000077201000-0x0000000077302000-memory.dmp

Filesize
1.0MB

Download
memory/2748-431-0x0000000077200000-0x00000000773A9000-memory.dmp

Filesize
1.7MB

Download
memory/2748-432-0x00000000773F0000-0x00000000774C6000-memory.dmp

Filesize
856KB

Download
memory/2748-433-0x0000000003BC0000-0x0000000005CB6000-memory.dmp

Filesize
33.0MB

Download

Analysis

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