44caliber | c6181c98720e7976fdf7356503ae8ec501136ca26028796fee8e666813bd5e5d

General

Target

c6181c98720e7976fdf7356503ae8ec501136ca26028796fee8e666813bd5e5d.exe
Size

793KB
MD5

f559e77721d8cc5bd97e037c4b3472cc
SHA1

f6dda6d685285301e23fd51338d0977fb5e03a6e
SHA256

c6181c98720e7976fdf7356503ae8ec501136ca26028796fee8e666813bd5e5d
SHA512

64d6e8d0bc9862f9eab80d0fa95fdbb42eab44efed4a90abe1a6a0c8b1a308b5940d90740beb211dd6c375b8dd1fb1706a76f484ccf439cfc3bb2ae0aacb3dd9

Score

10^/10

44caliber evasion spyware stealer

Malware Config

Extracted

Family

44caliber

C2

https://discord.com/api/webhooks/939927794656370699/MQUodH1jMxGoELXDI7vt3uVKvZAZN_FBkYRFlTiMVxHGCFnEzvPC7JNVH8-ESePeneQo

Signatures

44Caliber
An open source infostealer written in C#.
stealer 44caliber
Executes dropped EXE 2 IoCs

Processes:

loader_2.exeexample.exe

pid process

3548 loader_2.exe
4024 example.exe
Stops running service(s) 3 TTPs
evasion

Modify Existing Service
T1031

Impair Defenses
T1562

Service Stop
T1489

pid	process
3548	loader_2.exe
4024	example.exe

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

c6181c98720e7976fdf7356503ae8ec501136ca26028796fee8e666813bd5e5d.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Control Panel\International\Geo\Nation	c6181c98720e7976fdf7356503ae8ec501136ca26028796fee8e666813bd5e5d.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
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

4 freegeoip.app
5 freegeoip.app
Launches sc.exe
Sc.exe is a Windows utlilty to control services on the system.
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

flow	ioc
4	freegeoip.app
5	freegeoip.app

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:

loader_2.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	loader_2.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	loader_2.exe

Kills process with taskkill 12 IoCs

evasion

Processes:

taskkill.exetaskkill.exetaskkill.exetaskkill.exetaskkill.exetaskkill.exetaskkill.exetaskkill.exetaskkill.exetaskkill.exetaskkill.exetaskkill.exe

pid	process
3836	taskkill.exe
1880	taskkill.exe
1952	taskkill.exe
2588	taskkill.exe
4404	taskkill.exe
1308	taskkill.exe
4324	taskkill.exe
4612	taskkill.exe
712	taskkill.exe
3576	taskkill.exe
4700	taskkill.exe
4224	taskkill.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

loader_2.exe

pid process

3548 loader_2.exe
3548 loader_2.exe
3548 loader_2.exe
3548 loader_2.exe

pid	process
3548	loader_2.exe
3548	loader_2.exe
3548	loader_2.exe
3548	loader_2.exe

Suspicious use of AdjustPrivilegeToken 13 IoCs

Processes:

loader_2.exetaskkill.exetaskkill.exetaskkill.exetaskkill.exetaskkill.exetaskkill.exetaskkill.exetaskkill.exetaskkill.exetaskkill.exetaskkill.exetaskkill.exe

description	pid	process
Token: SeDebugPrivilege	3548	loader_2.exe
Token: SeDebugPrivilege	712	taskkill.exe
Token: SeDebugPrivilege	1952	taskkill.exe
Token: SeDebugPrivilege	2588	taskkill.exe
Token: SeDebugPrivilege	4404	taskkill.exe
Token: SeDebugPrivilege	3576	taskkill.exe
Token: SeDebugPrivilege	4700	taskkill.exe
Token: SeDebugPrivilege	1308	taskkill.exe
Token: SeDebugPrivilege	3836	taskkill.exe
Token: SeDebugPrivilege	4224	taskkill.exe
Token: SeDebugPrivilege	1880	taskkill.exe
Token: SeDebugPrivilege	4324	taskkill.exe
Token: SeDebugPrivilege	4612	taskkill.exe

Suspicious use of WriteProcessMemory 64 IoCs

Processes:

c6181c98720e7976fdf7356503ae8ec501136ca26028796fee8e666813bd5e5d.exeexample.execmd.execmd.execmd.execmd.execmd.execmd.execmd.execmd.execmd.execmd.execmd.execmd.execmd.execmd.exe

description	pid	process	target process
PID 3744 wrote to memory of 3548	3744	c6181c98720e7976fdf7356503ae8ec501136ca26028796fee8e666813bd5e5d.exe	loader_2.exe
PID 3744 wrote to memory of 3548	3744	c6181c98720e7976fdf7356503ae8ec501136ca26028796fee8e666813bd5e5d.exe	loader_2.exe
PID 3744 wrote to memory of 4024	3744	c6181c98720e7976fdf7356503ae8ec501136ca26028796fee8e666813bd5e5d.exe	example.exe
PID 3744 wrote to memory of 4024	3744	c6181c98720e7976fdf7356503ae8ec501136ca26028796fee8e666813bd5e5d.exe	example.exe
PID 4024 wrote to memory of 616	4024	example.exe	cmd.exe
PID 4024 wrote to memory of 616	4024	example.exe	cmd.exe
PID 616 wrote to memory of 712	616	cmd.exe	taskkill.exe
PID 616 wrote to memory of 712	616	cmd.exe	taskkill.exe
PID 4024 wrote to memory of 2028	4024	example.exe	cmd.exe
PID 4024 wrote to memory of 2028	4024	example.exe	cmd.exe
PID 2028 wrote to memory of 1952	2028	cmd.exe	taskkill.exe
PID 2028 wrote to memory of 1952	2028	cmd.exe	taskkill.exe
PID 4024 wrote to memory of 2360	4024	example.exe	cmd.exe
PID 4024 wrote to memory of 2360	4024	example.exe	cmd.exe
PID 2360 wrote to memory of 2588	2360	cmd.exe	taskkill.exe
PID 2360 wrote to memory of 2588	2360	cmd.exe	taskkill.exe
PID 4024 wrote to memory of 2804	4024	example.exe	cmd.exe
PID 4024 wrote to memory of 2804	4024	example.exe	cmd.exe
PID 2804 wrote to memory of 3860	2804	cmd.exe	sc.exe
PID 2804 wrote to memory of 3860	2804	cmd.exe	sc.exe
PID 4024 wrote to memory of 4808	4024	example.exe	cmd.exe
PID 4024 wrote to memory of 4808	4024	example.exe	cmd.exe
PID 4808 wrote to memory of 4404	4808	cmd.exe	taskkill.exe
PID 4808 wrote to memory of 4404	4808	cmd.exe	taskkill.exe
PID 4024 wrote to memory of 4368	4024	example.exe	cmd.exe
PID 4024 wrote to memory of 4368	4024	example.exe	cmd.exe
PID 4024 wrote to memory of 800	4024	example.exe	cmd.exe
PID 4024 wrote to memory of 800	4024	example.exe	cmd.exe
PID 800 wrote to memory of 3576	800	cmd.exe	taskkill.exe
PID 800 wrote to memory of 3576	800	cmd.exe	taskkill.exe
PID 4024 wrote to memory of 4288	4024	example.exe	cmd.exe
PID 4024 wrote to memory of 4288	4024	example.exe	cmd.exe
PID 4288 wrote to memory of 4700	4288	cmd.exe	taskkill.exe
PID 4288 wrote to memory of 4700	4288	cmd.exe	taskkill.exe
PID 4024 wrote to memory of 2312	4024	example.exe	cmd.exe
PID 4024 wrote to memory of 2312	4024	example.exe	cmd.exe
PID 2312 wrote to memory of 1308	2312	cmd.exe	taskkill.exe
PID 2312 wrote to memory of 1308	2312	cmd.exe	taskkill.exe
PID 4024 wrote to memory of 4604	4024	example.exe	cmd.exe
PID 4024 wrote to memory of 4604	4024	example.exe	cmd.exe
PID 4604 wrote to memory of 1244	4604	cmd.exe	sc.exe
PID 4604 wrote to memory of 1244	4604	cmd.exe	sc.exe
PID 4024 wrote to memory of 2700	4024	example.exe	cmd.exe
PID 4024 wrote to memory of 2700	4024	example.exe	cmd.exe
PID 2700 wrote to memory of 3836	2700	cmd.exe	taskkill.exe
PID 2700 wrote to memory of 3836	2700	cmd.exe	taskkill.exe
PID 4024 wrote to memory of 4948	4024	example.exe	cmd.exe
PID 4024 wrote to memory of 4948	4024	example.exe	cmd.exe
PID 4024 wrote to memory of 4676	4024	example.exe	cmd.exe
PID 4024 wrote to memory of 4676	4024	example.exe	cmd.exe
PID 4676 wrote to memory of 4224	4676	cmd.exe	taskkill.exe
PID 4676 wrote to memory of 4224	4676	cmd.exe	taskkill.exe
PID 4024 wrote to memory of 1936	4024	example.exe	cmd.exe
PID 4024 wrote to memory of 1936	4024	example.exe	cmd.exe
PID 1936 wrote to memory of 1880	1936	cmd.exe	taskkill.exe
PID 1936 wrote to memory of 1880	1936	cmd.exe	taskkill.exe
PID 4024 wrote to memory of 1740	4024	example.exe	cmd.exe
PID 4024 wrote to memory of 1740	4024	example.exe	cmd.exe
PID 1740 wrote to memory of 4324	1740	cmd.exe	taskkill.exe
PID 1740 wrote to memory of 4324	1740	cmd.exe	taskkill.exe
PID 4024 wrote to memory of 3108	4024	example.exe	cmd.exe
PID 4024 wrote to memory of 3108	4024	example.exe	cmd.exe
PID 3108 wrote to memory of 4500	3108	cmd.exe	sc.exe
PID 3108 wrote to memory of 4500	3108	cmd.exe	sc.exe

C:\Users\Admin\AppData\Local\Temp\c6181c98720e7976fdf7356503ae8ec501136ca26028796fee8e666813bd5e5d.exe
"C:\Users\Admin\AppData\Local\Temp\c6181c98720e7976fdf7356503ae8ec501136ca26028796fee8e666813bd5e5d.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3744

C:\Users\Admin\AppData\Local\Temp\loader_2.exe
"C:\Users\Admin\AppData\Local\Temp\loader_2.exe"
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3548

C:\Users\Admin\AppData\Local\Temp\example.exe
"C:\Users\Admin\AppData\Local\Temp\example.exe"
2⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:4024

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c taskkill /FI "IMAGENAME eq fiddler*" /IM * /F /T >nul 2>&1
3⤵
- Suspicious use of WriteProcessMemory
PID:616

C:\Windows\system32\taskkill.exe
taskkill /FI "IMAGENAME eq fiddler*" /IM * /F /T
4⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:712

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c taskkill /FI "IMAGENAME eq wireshark*" /IM * /F /T >nul 2>&1
3⤵
- Suspicious use of WriteProcessMemory
PID:2028

C:\Windows\system32\taskkill.exe
taskkill /FI "IMAGENAME eq wireshark*" /IM * /F /T
4⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:1952

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c taskkill /FI "IMAGENAME eq httpdebugger*" /IM * /F /T >nul 2>&1
3⤵
- Suspicious use of WriteProcessMemory
PID:2360

C:\Windows\system32\taskkill.exe
taskkill /FI "IMAGENAME eq httpdebugger*" /IM * /F /T
4⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:2588

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c sc stop HTTPDebuggerPro >nul 2>&1
3⤵
- Suspicious use of WriteProcessMemory
PID:2804

C:\Windows\system32\sc.exe
sc stop HTTPDebuggerPro
4⤵
PID:3860

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c taskkill /IM HTTPDebuggerSvc.exe /F >nul 2>&1
3⤵
- Suspicious use of WriteProcessMemory
PID:4808

C:\Windows\system32\taskkill.exe
taskkill /IM HTTPDebuggerSvc.exe /F
4⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:4404

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c @RD /S /Q "C:\Users\%username%\AppData\Local\Microsoft\Windows\INetCache\IE" >nul 2>&1
3⤵
PID:4368

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c taskkill /FI "IMAGENAME eq fiddler*" /IM * /F /T >nul 2>&1
3⤵
- Suspicious use of WriteProcessMemory
PID:800

C:\Windows\system32\taskkill.exe
taskkill /FI "IMAGENAME eq fiddler*" /IM * /F /T
4⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:3576

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c taskkill /FI "IMAGENAME eq wireshark*" /IM * /F /T >nul 2>&1
3⤵
- Suspicious use of WriteProcessMemory
PID:4288

C:\Windows\system32\taskkill.exe
taskkill /FI "IMAGENAME eq wireshark*" /IM * /F /T
4⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:4700

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c taskkill /FI "IMAGENAME eq httpdebugger*" /IM * /F /T >nul 2>&1
3⤵
- Suspicious use of WriteProcessMemory
PID:2312

C:\Windows\system32\taskkill.exe
taskkill /FI "IMAGENAME eq httpdebugger*" /IM * /F /T
4⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:1308

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c sc stop HTTPDebuggerPro >nul 2>&1
3⤵
- Suspicious use of WriteProcessMemory
PID:4604

C:\Windows\system32\sc.exe
sc stop HTTPDebuggerPro
4⤵
PID:1244

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c taskkill /IM HTTPDebuggerSvc.exe /F >nul 2>&1
3⤵
- Suspicious use of WriteProcessMemory
PID:2700

C:\Windows\system32\taskkill.exe
taskkill /IM HTTPDebuggerSvc.exe /F
4⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:3836

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c @RD /S /Q "C:\Users\%username%\AppData\Local\Microsoft\Windows\INetCache\IE" >nul 2>&1
3⤵
PID:4948

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c taskkill /FI "IMAGENAME eq fiddler*" /IM * /F /T >nul 2>&1
3⤵
- Suspicious use of WriteProcessMemory
PID:4676

C:\Windows\system32\taskkill.exe
taskkill /FI "IMAGENAME eq fiddler*" /IM * /F /T
4⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:4224

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c taskkill /FI "IMAGENAME eq wireshark*" /IM * /F /T >nul 2>&1
3⤵
- Suspicious use of WriteProcessMemory
PID:1936

C:\Windows\system32\taskkill.exe
taskkill /FI "IMAGENAME eq wireshark*" /IM * /F /T
4⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:1880

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c taskkill /FI "IMAGENAME eq httpdebugger*" /IM * /F /T >nul 2>&1
3⤵
- Suspicious use of WriteProcessMemory
PID:1740

C:\Windows\system32\taskkill.exe
taskkill /FI "IMAGENAME eq httpdebugger*" /IM * /F /T
4⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:4324

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c sc stop HTTPDebuggerPro >nul 2>&1
3⤵
- Suspicious use of WriteProcessMemory
PID:3108

C:\Windows\system32\sc.exe
sc stop HTTPDebuggerPro
4⤵
PID:4500

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c taskkill /IM HTTPDebuggerSvc.exe /F >nul 2>&1
3⤵
PID:4508

C:\Windows\system32\taskkill.exe
taskkill /IM HTTPDebuggerSvc.exe /F
4⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:4612

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c @RD /S /Q "C:\Users\%username%\AppData\Local\Microsoft\Windows\INetCache\IE" >nul 2>&1
3⤵
PID:3192

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Modify Existing Service

1

T1031

Privilege Escalation

Defense Evasion

Impair Defenses

1

T1562

Credential Access

Credentials in Files

2

T1081

Discovery

Query Registry

2

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Data from Local System

2

T1005

Exfiltration

Command and Control

Impact

Service Stop

1

T1489

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Downloads

C:\Users\Admin\AppData\Local\Temp\example.exe
MD5
009ea83f03fdd2d1da3fc57e118f137f

SHA1
e1f07d0577636f8df4e50d2e45b83dd1d17ef875

SHA256
a4af83b6cfeb0471b5c38a3ca3a118d5bab056dc05db1883ddc751430140bb3c

SHA512
32a0a12c3ce7046e6a2bcb45e958b2030fa158be51b3d485f9cf6b18a5c2c50e307c7ce928da74e3f0095de4c3a0999b6059deaf28a3632ce954f55fc4613fd7

Download Submit
C:\Users\Admin\AppData\Local\Temp\example.exe
MD5
009ea83f03fdd2d1da3fc57e118f137f

SHA1
e1f07d0577636f8df4e50d2e45b83dd1d17ef875

SHA256
a4af83b6cfeb0471b5c38a3ca3a118d5bab056dc05db1883ddc751430140bb3c

SHA512
32a0a12c3ce7046e6a2bcb45e958b2030fa158be51b3d485f9cf6b18a5c2c50e307c7ce928da74e3f0095de4c3a0999b6059deaf28a3632ce954f55fc4613fd7

Download Submit
C:\Users\Admin\AppData\Local\Temp\loader_2.exe
MD5
f16b30ce57b3d0678d55d91953597faa

SHA1
7348bfa2fd87b1e5f556c54fa650eb376c60006d

SHA256
d4515c61a5b8ec675d401277f69a863e6ef01875e749e027ef6bde29674fc291

SHA512
fe22efa8d7ac0688be13b3fa2e168c9adfc5afa5d39132213a45f1ea1b9d2cd550f15655885cd819c6b8f94381f69620281b38ec907c5d0070d4442baf99f448

Download Submit
C:\Users\Admin\AppData\Local\Temp\loader_2.exe
MD5
f16b30ce57b3d0678d55d91953597faa

SHA1
7348bfa2fd87b1e5f556c54fa650eb376c60006d

SHA256
d4515c61a5b8ec675d401277f69a863e6ef01875e749e027ef6bde29674fc291

SHA512
fe22efa8d7ac0688be13b3fa2e168c9adfc5afa5d39132213a45f1ea1b9d2cd550f15655885cd819c6b8f94381f69620281b38ec907c5d0070d4442baf99f448

Download Submit
memory/3548-132-0x0000000000310000-0x000000000035A000-memory.dmp

Filesize
296KB

Download
memory/3548-135-0x00007FFC86943000-0x00007FFC86945000-memory.dmp

Filesize
8KB

Download
memory/3548-136-0x00000000024D0000-0x00000000024D2000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads