44caliber | e672d73cf01f809e167c3b42609d6eb719ae187313f083e4e0ce522d6e6d8f3f

Analysis

max time kernel
139s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
18-06-2022 12:05

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General

Target

Kogtervan.exe
Size

1.2MB
MD5

1557a74487c9a87068200ed57aa4f41c
SHA1

21c6fe977ffe351442dde5a67302d934448c2798
SHA256

e672d73cf01f809e167c3b42609d6eb719ae187313f083e4e0ce522d6e6d8f3f
SHA512

d1341180c9426a346bec55bd6ba606de52ffab8309868e28d276120817d20a587a74d58c442efa8cd125d2954b43ec4c0d5d1f88f9dd637d1c346853e75a3c44

Score

10^/10

44caliber orcus user persistence rat spyware stealer

Malware Config

Extracted

Family

orcus

Botnet

User

212.220.202.104:1604

Mutex

f3551b5b37bf41eb87431cb1dd626833

Attributes

autostart_method
Registry
enable_keylogger
true
install_path
%programfiles%\System\Update.exe
reconnect_delay
500
registry_keyname
Ocrus
taskscheduler_taskname
Ocrus
watchdog_path
AppData\system32

Extracted

Family

44caliber

https://discord.com/api/webhooks/921092565279850547/hht9p6Dov5UjlDv5Ho0zPIWCWLDfItsjCjCzkyreb1p0x6_xjYrced5Y9xHEMY-_qP8i

Signatures

44Caliber
An open source infostealer written in C#.
stealer 44caliber
Orcus
Orcus is a Remote Access Trojan that is being sold on underground forums.
rat spyware stealer orcus

Orcus Main Payload 5 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\Soft.exe	family_orcus
C:\Users\Admin\AppData\Local\Temp\Soft.exe	family_orcus
C:\Program Files (x86)\System\Update.exe	family_orcus
C:\Program Files (x86)\System\Update.exe	family_orcus
C:\Program Files (x86)\System\Update.exe	family_orcus

Orcurs Rat Executable 6 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\Soft.exe	orcus
C:\Users\Admin\AppData\Local\Temp\Soft.exe	orcus
behavioral2/memory/4084-137-0x0000000000140000-0x000000000022E000-memory.dmp	orcus
C:\Program Files (x86)\System\Update.exe	orcus
C:\Program Files (x86)\System\Update.exe	orcus
C:\Program Files (x86)\System\Update.exe	orcus

Executes dropped EXE 6 IoCs

Processes:

Soft.exeInsidious.exeWindowsInput.exeWindowsInput.exeUpdate.exeUpdate.exe

pid process

4084 Soft.exe
4144 Insidious.exe
4600 WindowsInput.exe
2660 WindowsInput.exe
1712 Update.exe
4276 Update.exe

pid	process
4084	Soft.exe
4144	Insidious.exe
4600	WindowsInput.exe
2660	WindowsInput.exe
1712	Update.exe
4276	Update.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

Soft.exeKogtervan.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation	Soft.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation	Kogtervan.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

Update.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Ocrus = "\"C:\\Program Files (x86)\\System\\Update.exe\""	Update.exe

Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

10 freegeoip.app
11 freegeoip.app

flow	ioc
10	freegeoip.app
11	freegeoip.app

Drops file in System32 directory 3 IoCs

Processes:

Soft.exeWindowsInput.exe

description	ioc	process
File created	C:\Windows\SysWOW64\WindowsInput.exe	Soft.exe
File created	C:\Windows\SysWOW64\WindowsInput.exe.config	Soft.exe
File created	C:\Windows\SysWOW64\WindowsInput.InstallState	WindowsInput.exe

Drops file in Program Files directory 3 IoCs

Processes:

Soft.exe

description	ioc	process
File created	C:\Program Files (x86)\System\Update.exe	Soft.exe
File opened for modification	C:\Program Files (x86)\System\Update.exe	Soft.exe
File created	C:\Program Files (x86)\System\Update.exe.config	Soft.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

Insidious.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	Insidious.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	Insidious.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

Insidious.exe

pid process

4144 Insidious.exe
4144 Insidious.exe
4144 Insidious.exe
4144 Insidious.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Insidious.exeUpdate.exe

description pid process

Token: SeDebugPrivilege 4144 Insidious.exe
Token: SeDebugPrivilege 1712 Update.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Update.exe

pid process

1712 Update.exe

pid	process
4144	Insidious.exe
4144	Insidious.exe
4144	Insidious.exe
4144	Insidious.exe

description	pid	process
Token: SeDebugPrivilege	4144	Insidious.exe
Token: SeDebugPrivilege	1712	Update.exe

pid	process
1712	Update.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

Kogtervan.exeSoft.exe

description	pid	process	target process
PID 2068 wrote to memory of 4084	2068	Kogtervan.exe	Soft.exe
PID 2068 wrote to memory of 4084	2068	Kogtervan.exe	Soft.exe
PID 2068 wrote to memory of 4084	2068	Kogtervan.exe	Soft.exe
PID 2068 wrote to memory of 4144	2068	Kogtervan.exe	Insidious.exe
PID 2068 wrote to memory of 4144	2068	Kogtervan.exe	Insidious.exe
PID 4084 wrote to memory of 4600	4084	Soft.exe	WindowsInput.exe
PID 4084 wrote to memory of 4600	4084	Soft.exe	WindowsInput.exe
PID 4084 wrote to memory of 1712	4084	Soft.exe	Update.exe
PID 4084 wrote to memory of 1712	4084	Soft.exe	Update.exe
PID 4084 wrote to memory of 1712	4084	Soft.exe	Update.exe

C:\Users\Admin\AppData\Local\Temp\Kogtervan.exe
"C:\Users\Admin\AppData\Local\Temp\Kogtervan.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2068

C:\Users\Admin\AppData\Local\Temp\Soft.exe
"C:\Users\Admin\AppData\Local\Temp\Soft.exe"
2⤵
- Executes dropped EXE
- Checks computer location settings
- Drops file in System32 directory
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:4084

C:\Windows\SysWOW64\WindowsInput.exe
"C:\Windows\SysWOW64\WindowsInput.exe" --install
3⤵
- Executes dropped EXE
- Drops file in System32 directory
PID:4600

C:\Program Files (x86)\System\Update.exe
"C:\Program Files (x86)\System\Update.exe"
3⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:1712

C:\Users\Admin\AppData\Local\Temp\Insidious.exe
"C:\Users\Admin\AppData\Local\Temp\Insidious.exe"
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4144

C:\Windows\SysWOW64\WindowsInput.exe
"C:\Windows\SysWOW64\WindowsInput.exe"
1⤵
- Executes dropped EXE
PID:2660

C:\Program Files (x86)\System\Update.exe
"C:\Program Files (x86)\System\Update.exe"
1⤵
- Executes dropped EXE
PID:4276

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Program Files (x86)\System\Update.exe

Filesize
928KB

MD5
abc4b38009114ed7dae0d6e988532b46

SHA1
ace97d12bc68117dd3e6af05c123f4ce6580c320

SHA256
5aed235987247abdbfcbcdb721344f236a9190380465176616a8b689e12e48f2

SHA512
83d3d9c2b335d9e21574bfcfb7a4233ab693881d497682115a46db091e8b3f7e180974b94d925216ce820218e96691267a615dab05736bad4939d6901880364d

Download Submit
C:\Program Files (x86)\System\Update.exe

Filesize
928KB

MD5
abc4b38009114ed7dae0d6e988532b46

SHA1
ace97d12bc68117dd3e6af05c123f4ce6580c320

SHA256
5aed235987247abdbfcbcdb721344f236a9190380465176616a8b689e12e48f2

SHA512
83d3d9c2b335d9e21574bfcfb7a4233ab693881d497682115a46db091e8b3f7e180974b94d925216ce820218e96691267a615dab05736bad4939d6901880364d

Download Submit
C:\Program Files (x86)\System\Update.exe

Filesize
928KB

MD5
abc4b38009114ed7dae0d6e988532b46

SHA1
ace97d12bc68117dd3e6af05c123f4ce6580c320

SHA256
5aed235987247abdbfcbcdb721344f236a9190380465176616a8b689e12e48f2

SHA512
83d3d9c2b335d9e21574bfcfb7a4233ab693881d497682115a46db091e8b3f7e180974b94d925216ce820218e96691267a615dab05736bad4939d6901880364d

Download Submit
C:\Program Files (x86)\System\Update.exe.config

Filesize
357B

MD5
a2b76cea3a59fa9af5ea21ff68139c98

SHA1
35d76475e6a54c168f536e30206578babff58274

SHA256
f99ef5bf79a7c43701877f0bb0b890591885bb0a3d605762647cc8ffbf10c839

SHA512
b52608b45153c489419228864ecbcb92be24c644d470818dfe15f8c7e661a7bcd034ea13ef401f2b84ad5c29a41c9b4c7d161cc33ae3ef71659bc2bca1a8c4ad

Download Submit
C:\Users\Admin\AppData\Local\Temp\Insidious.exe

Filesize
274KB

MD5
1df27f86af1fa04dd8fa366932c4e5a4

SHA1
b6c76c7ef5907909782c8f15f9a5d2c2d9ef5b3f

SHA256
3ccceda1aecfae9d07d5b2906addaca7e0c7c379bfd357cf4a1b9306bbf887df

SHA512
f0270e3b15fc11a3f3a930ea08f54a83671dda748dfb9c410c11b74b94a98b1ebaf5905517c0a7b23e6102380fbaa5f7023f740bdf849a684cde4eb1a9b65e1c

Download Submit
C:\Users\Admin\AppData\Local\Temp\Insidious.exe

Filesize
274KB

MD5
1df27f86af1fa04dd8fa366932c4e5a4

SHA1
b6c76c7ef5907909782c8f15f9a5d2c2d9ef5b3f

SHA256
3ccceda1aecfae9d07d5b2906addaca7e0c7c379bfd357cf4a1b9306bbf887df

SHA512
f0270e3b15fc11a3f3a930ea08f54a83671dda748dfb9c410c11b74b94a98b1ebaf5905517c0a7b23e6102380fbaa5f7023f740bdf849a684cde4eb1a9b65e1c

Download Submit
C:\Users\Admin\AppData\Local\Temp\Soft.exe

Filesize
928KB

MD5
abc4b38009114ed7dae0d6e988532b46

SHA1
ace97d12bc68117dd3e6af05c123f4ce6580c320

SHA256
5aed235987247abdbfcbcdb721344f236a9190380465176616a8b689e12e48f2

SHA512
83d3d9c2b335d9e21574bfcfb7a4233ab693881d497682115a46db091e8b3f7e180974b94d925216ce820218e96691267a615dab05736bad4939d6901880364d

Download Submit
C:\Users\Admin\AppData\Local\Temp\Soft.exe

Filesize
928KB

MD5
abc4b38009114ed7dae0d6e988532b46

SHA1
ace97d12bc68117dd3e6af05c123f4ce6580c320

SHA256
5aed235987247abdbfcbcdb721344f236a9190380465176616a8b689e12e48f2

SHA512
83d3d9c2b335d9e21574bfcfb7a4233ab693881d497682115a46db091e8b3f7e180974b94d925216ce820218e96691267a615dab05736bad4939d6901880364d

Download Submit
C:\Windows\SysWOW64\WindowsInput.exe

Filesize
21KB

MD5
e6fcf516d8ed8d0d4427f86e08d0d435

SHA1
c7691731583ab7890086635cb7f3e4c22ca5e409

SHA256
8dbe814359391ed6b0b5b182039008cf1d00964da9fbc4747f46242a95c24337

SHA512
c496cf8e2e222fe1e19051b291e6860f31aae39f54369c1c5e8c9758c4b56e8af904e3e536e743a0a6fdbbf8478afba4baee92e13fc1b3073376ac6bf4a7948e

Download Submit
C:\Windows\SysWOW64\WindowsInput.exe

Filesize
21KB

MD5
e6fcf516d8ed8d0d4427f86e08d0d435

SHA1
c7691731583ab7890086635cb7f3e4c22ca5e409

SHA256
8dbe814359391ed6b0b5b182039008cf1d00964da9fbc4747f46242a95c24337

SHA512
c496cf8e2e222fe1e19051b291e6860f31aae39f54369c1c5e8c9758c4b56e8af904e3e536e743a0a6fdbbf8478afba4baee92e13fc1b3073376ac6bf4a7948e

Download Submit
C:\Windows\SysWOW64\WindowsInput.exe

Filesize
21KB

MD5
e6fcf516d8ed8d0d4427f86e08d0d435

SHA1
c7691731583ab7890086635cb7f3e4c22ca5e409

SHA256
8dbe814359391ed6b0b5b182039008cf1d00964da9fbc4747f46242a95c24337

SHA512
c496cf8e2e222fe1e19051b291e6860f31aae39f54369c1c5e8c9758c4b56e8af904e3e536e743a0a6fdbbf8478afba4baee92e13fc1b3073376ac6bf4a7948e

Download Submit
C:\Windows\SysWOW64\WindowsInput.exe.config

Filesize
357B

MD5
a2b76cea3a59fa9af5ea21ff68139c98

SHA1
35d76475e6a54c168f536e30206578babff58274

SHA256
f99ef5bf79a7c43701877f0bb0b890591885bb0a3d605762647cc8ffbf10c839

SHA512
b52608b45153c489419228864ecbcb92be24c644d470818dfe15f8c7e661a7bcd034ea13ef401f2b84ad5c29a41c9b4c7d161cc33ae3ef71659bc2bca1a8c4ad

Download Submit
memory/1712-159-0x00000000065F0000-0x00000000067B2000-memory.dmp

Filesize
1.8MB

Download
memory/1712-160-0x0000000006540000-0x000000000654A000-memory.dmp

Filesize
40KB

Download
memory/1712-161-0x0000000006CF0000-0x0000000006D56000-memory.dmp

Filesize
408KB

Download
memory/1712-154-0x0000000000000000-mapping.dmp

Download
memory/1712-162-0x0000000007750000-0x0000000007D68000-memory.dmp

Filesize
6.1MB

Download
memory/1712-163-0x0000000006D60000-0x0000000006D72000-memory.dmp

Filesize
72KB

Download
memory/1712-164-0x0000000007130000-0x000000000716C000-memory.dmp

Filesize
240KB

Download
memory/1712-165-0x00000000072E0000-0x00000000073EA000-memory.dmp

Filesize
1.0MB

Download
memory/2660-166-0x00007FFBA4980000-0x00007FFBA5441000-memory.dmp

Filesize
10.8MB

Download
memory/2660-152-0x000000001AE90000-0x000000001AF9A000-memory.dmp

Filesize
1.0MB

Download
memory/2660-151-0x00007FFBA4980000-0x00007FFBA5441000-memory.dmp

Filesize
10.8MB

Download
memory/4084-139-0x00000000051D0000-0x0000000005774000-memory.dmp

Filesize
5.6MB

Download
memory/4084-141-0x0000000005160000-0x0000000005182000-memory.dmp

Filesize
136KB

Download
memory/4084-137-0x0000000000140000-0x000000000022E000-memory.dmp

Filesize
952KB

Download
memory/4084-130-0x0000000000000000-mapping.dmp

Download
memory/4084-140-0x0000000004D00000-0x0000000004D92000-memory.dmp

Filesize
584KB

Download
memory/4144-138-0x00007FFBA4980000-0x00007FFBA5441000-memory.dmp

Filesize
10.8MB

Download
memory/4144-153-0x00007FFBA4980000-0x00007FFBA5441000-memory.dmp

Filesize
10.8MB

Download
memory/4144-136-0x0000000000E50000-0x0000000000E9A000-memory.dmp

Filesize
296KB

Download
memory/4144-133-0x0000000000000000-mapping.dmp

Download
memory/4600-142-0x0000000000000000-mapping.dmp

Download
memory/4600-146-0x0000000000E40000-0x0000000000E4C000-memory.dmp

Filesize
48KB

Download
memory/4600-147-0x0000000001490000-0x00000000014A2000-memory.dmp

Filesize
72KB

Download
memory/4600-148-0x0000000002F00000-0x0000000002F3C000-memory.dmp

Filesize
240KB

Download
memory/4600-149-0x00007FFBA4980000-0x00007FFBA5441000-memory.dmp

Filesize
10.8MB

Download