onlylogger | bc71bc7f6ce5a6d4502c997d27bf5382221dc736a59cb00c65f68cd0981ad424

General

Target
bc71bc7f6ce5a6d4502c997d27bf5382221dc736a59cb00c65f68cd0981ad424.exe
Size 263KB
Sample220508-g4bhrshcc7
SHA256 bc71bc7f6ce5a6d4502c997d27bf5382221dc736a59cb00c65f68cd0981ad424
MD5 8144dd88fc6b522c1e68937c820a8ad0
SHA1 3551922adcacbfc72c7fe7db3f17396a6e84c6da
SHA512 bd4f910d630f9a0160262bfb929d23807737e1a1bbc2974a88edb8de6a14f05787a2cdbd40197abe223be84eede55cc348aaf9a76434e9ccd4499dfb2db00835
MD5 SHA1 SHA512

Score

10^/10

onlylogger loader

Malware Config

Signatures

OnlyLogger
A tiny loader that uses IPLogger to get its payload.
loader onlylogger

OnlyLogger Payload 2 IoCs

resource	yara_rule
behavioral2/memory/1492-131-0x0000000000AA0000-0x0000000000AE6000-memory.dmp	family_onlylogger
behavioral2/memory/1492-132-0x0000000000400000-0x00000000007FF000-memory.dmp	family_onlylogger

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation	bc71bc7f6ce5a6d4502c997d27bf5382221dc736a59cb00c65f68cd0981ad424.exe

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

System Information Discovery
T1082

Program crash 8 IoCs

pid	pid_target	Process	procid_target
2188	1492	WerFault.exe	81
932	1492	WerFault.exe	81
244	1492	WerFault.exe	81
400	1492	WerFault.exe	81
5016	1492	WerFault.exe	81
2260	1492	WerFault.exe	81
3200	1492	WerFault.exe	81
2664	1492	WerFault.exe	81

Kills process with taskkill 1 IoCs

evasion

pid	Process
1080	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1080	taskkill.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1492 wrote to memory of 4344	1492	bc71bc7f6ce5a6d4502c997d27bf5382221dc736a59cb00c65f68cd0981ad424.exe	105
PID 1492 wrote to memory of 4344	1492	bc71bc7f6ce5a6d4502c997d27bf5382221dc736a59cb00c65f68cd0981ad424.exe	105
PID 1492 wrote to memory of 4344	1492	bc71bc7f6ce5a6d4502c997d27bf5382221dc736a59cb00c65f68cd0981ad424.exe	105
PID 4344 wrote to memory of 1080	4344	cmd.exe	109
PID 4344 wrote to memory of 1080	4344	cmd.exe	109
PID 4344 wrote to memory of 1080	4344	cmd.exe	109

C:\Users\Admin\AppData\Local\Temp\bc71bc7f6ce5a6d4502c997d27bf5382221dc736a59cb00c65f68cd0981ad424.exe
"C:\Users\Admin\AppData\Local\Temp\bc71bc7f6ce5a6d4502c997d27bf5382221dc736a59cb00c65f68cd0981ad424.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1492
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1492 -s 612
  2⤵
  - Program crash
  PID:2188
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1492 -s 652
  2⤵
  - Program crash
  PID:932
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1492 -s 648
  2⤵
  - Program crash
  PID:244
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1492 -s 636
  2⤵
  - Program crash
  PID:400
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1492 -s 744
  2⤵
  - Program crash
  PID:5016
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1492 -s 1184
  2⤵
  - Program crash
  PID:2260
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1492 -s 1236
  2⤵
  - Program crash
  PID:3200
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "bc71bc7f6ce5a6d4502c997d27bf5382221dc736a59cb00c65f68cd0981ad424.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\bc71bc7f6ce5a6d4502c997d27bf5382221dc736a59cb00c65f68cd0981ad424.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4344
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "bc71bc7f6ce5a6d4502c997d27bf5382221dc736a59cb00c65f68cd0981ad424.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1080
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1492 -s 1260
  2⤵
  - Program crash
  PID:2664

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 1492 -ip 1492
1⤵
PID:936

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 512 -p 1492 -ip 1492
1⤵
PID:4860

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 1492 -ip 1492
1⤵
PID:4580

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 1492 -ip 1492
1⤵
PID:204

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 1492 -ip 1492
1⤵
PID:648

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 544 -p 1492 -ip 1492
1⤵
PID:2292

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 1492 -ip 1492
1⤵
PID:3568

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 1492 -ip 1492
1⤵
PID:5024

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1492-130-0x0000000000B18000-0x0000000000B40000-memory.dmp

Download

memory/1492-131-0x0000000000AA0000-0x0000000000AE6000-memory.dmp

Download

memory/1492-132-0x0000000000400000-0x00000000007FF000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads