nymaim | 23fd1ddc7d1befcbb150dbcd8dea334d7262de525938393cdf63af103894a75b

Analysis

max time kernel
101s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
26/09/2022, 22:55

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General

Target
file.exe
Size 216KB
Sample220926-2v44yadcbm
SHA256 23fd1ddc7d1befcbb150dbcd8dea334d7262de525938393cdf63af103894a75b
MD5 2b1ea0d64803b1dcd65a7777454818ef
SHA1 eba3258af6ff70c5f97cf03469dcdea946539c5b
SHA512 292cc1c170acacca47b8975d59f1cd3ef2d745691dedf4c8c63c2e088831535849e642fe767008b9ee8f8bdaa85f9b7d929708bceb932d6fce0de0e4c92a1f16
SSDEEP 3072:dWf74T85cGB54g0+YAqcqSndYiKaNXBuUP5xg1Ap5H3UAcWj55B:de7LDR9d5NXwUPDg1Q3VcW
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim trojan

Malware Config

Extracted

Family

nymaim

208.67.104.97
85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim
Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
4848	Cleaner.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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	file.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Program crash 12 IoCs

pid	pid_target	Process	procid_target
4060	3972	WerFault.exe	82
5020	3972	WerFault.exe	82
3440	3972	WerFault.exe	82
1084	3972	WerFault.exe	82
3812	3972	WerFault.exe	82
4100	3972	WerFault.exe	82
3692	3972	WerFault.exe	82
4376	3972	WerFault.exe	82
4556	3972	WerFault.exe	82
4060	3972	WerFault.exe	82
1292	3972	WerFault.exe	82
2688	3972	WerFault.exe	82

Kills process with taskkill 1 IoCs

evasion

pid	Process
3956	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3972	file.exe
3972	file.exe
3972	file.exe
3972	file.exe
3972	file.exe
3972	file.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3972	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4848	Cleaner.exe
Token: SeDebugPrivilege	3956	taskkill.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 3972 wrote to memory of 3612	3972	file.exe	114
PID 3972 wrote to memory of 3612	3972	file.exe	114
PID 3972 wrote to memory of 3612	3972	file.exe	114
PID 3612 wrote to memory of 4848	3612	cmd.exe	116
PID 3612 wrote to memory of 4848	3612	cmd.exe	116
PID 3972 wrote to memory of 2288	3972	file.exe	126
PID 3972 wrote to memory of 2288	3972	file.exe	126
PID 3972 wrote to memory of 2288	3972	file.exe	126
PID 2288 wrote to memory of 3956	2288	cmd.exe	130
PID 2288 wrote to memory of 3956	2288	cmd.exe	130
PID 2288 wrote to memory of 3956	2288	cmd.exe	130

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:3972
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3972 -s 460
  2⤵
  - Program crash
  PID:4060
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3972 -s 756
  2⤵
  - Program crash
  PID:5020
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3972 -s 772
  2⤵
  - Program crash
  PID:3440
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3972 -s 796
  2⤵
  - Program crash
  PID:1084
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3972 -s 804
  2⤵
  - Program crash
  PID:3812
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3972 -s 928
  2⤵
  - Program crash
  PID:4100
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3972 -s 1000
  2⤵
  - Program crash
  PID:3692
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3972 -s 1084
  2⤵
  - Program crash
  PID:4376
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3972 -s 1376
  2⤵
  - Program crash
  PID:4556
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\aencL0o48Rn7smEqhP8YO6rz\Cleaner.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3612
- - C:\Users\Admin\AppData\Local\Temp\aencL0o48Rn7smEqhP8YO6rz\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\aencL0o48Rn7smEqhP8YO6rz\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:4848
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3972 -s 1376
  2⤵
  - Program crash
  PID:4060
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3972 -s 1760
  2⤵
  - Program crash
  PID:1292
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "file.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\file.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2288
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:3956
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3972 -s 540
  2⤵
  - Program crash
  PID:2688

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 3972 -ip 3972
1⤵
PID:4356

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 3972 -ip 3972
1⤵
PID:1348

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 512 -p 3972 -ip 3972
1⤵
PID:3456

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 188 -p 3972 -ip 3972
1⤵
PID:3604

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 3972 -ip 3972
1⤵
PID:4392

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 360 -p 3972 -ip 3972
1⤵
PID:3172

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 360 -p 3972 -ip 3972
1⤵
PID:4464

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 3972 -ip 3972
1⤵
PID:3820

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 3972 -ip 3972
1⤵
PID:4500

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 3972 -ip 3972
1⤵
PID:3204

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 512 -p 3972 -ip 3972
1⤵
PID:780

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 3972 -ip 3972
1⤵
PID:5052

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Web Service

T1102

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

Bunifu_UI_v1.5.3.dll

Path C:\Users\Admin\AppData\Local\Temp\aencL0o48Rn7smEqhP8YO6rz\Bunifu_UI_v1.5.3.dll
Size 236KB
SHA256 f1b3e0f2750a9103e46a6a4a34f1cf9d17779725f98042cc2475ec66484801cf
MD5 2ecb51ab00c5f340380ecf849291dbcf
SHA1 1a4dffbce2a4ce65495ed79eab42a4da3b660931
SHA512 e241a48eafcaf99187035f0870d24d74ae97fe84aaadd2591cceea9f64b8223d77cfb17a038a58eadd3b822c5201a6f7494f26eea6f77d95f77f6c668d088e6b
SSDEEP 6144:SIQpxILDXGGMO7Ice9C5kQw2hWHcHTykhb:SIQpxILDXGGlET9n/cHG
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\aencL0o48Rn7smEqhP8YO6rz\Cleaner.exe
Size 4.2MB
SHA256 663a353b45ed8f3acd4abc429f519635c1cf1294e3b9af98ffe6b1d4937c0e8f
MD5 e89589df13ac2783f322449f63547468
SHA1 bd938f596e09e2ed04c3bc0f0ac68de71e04bcf6
SHA512 9e0126975b32d022b6fe89d4681981e57ef1a3c6375ee2df131ce3527a3ad91c795d75302b78c8fc59651e9e20cebfd177b3278a87f45f8174f9e4ec09fc9cc6
SSDEEP 98304:B3D///UUrPV0vER7ehER7ehER7ehER7ehER7ehER7ehER7ehER7eG:Zacfffffffb
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\aencL0o48Rn7smEqhP8YO6rz\Cleaner.exe
Size 4.2MB
SHA256 663a353b45ed8f3acd4abc429f519635c1cf1294e3b9af98ffe6b1d4937c0e8f
MD5 e89589df13ac2783f322449f63547468
SHA1 bd938f596e09e2ed04c3bc0f0ac68de71e04bcf6
SHA512 9e0126975b32d022b6fe89d4681981e57ef1a3c6375ee2df131ce3527a3ad91c795d75302b78c8fc59651e9e20cebfd177b3278a87f45f8174f9e4ec09fc9cc6
SSDEEP 98304:B3D///UUrPV0vER7ehER7ehER7ehER7ehER7ehER7ehER7ehER7eG:Zacfffffffb
MD5 SHA1 SHA512 SSDEEP

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memory/3972-132-0x00000000007E9000-0x000000000080F000-memory.dmp

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memory/3972-146-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/3972-153-0x0000000000400000-0x0000000000593000-memory.dmp

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memory/3972-134-0x0000000000400000-0x0000000000593000-memory.dmp

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memory/3972-152-0x00000000007E9000-0x000000000080F000-memory.dmp

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memory/3972-142-0x00000000007E9000-0x000000000080F000-memory.dmp

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memory/3972-143-0x0000000000400000-0x0000000000593000-memory.dmp

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memory/3972-133-0x00000000021B0000-0x00000000021EF000-memory.dmp

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memory/4848-145-0x00007FF83B040000-0x00007FF83BB01000-memory.dmp

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memory/4848-144-0x00007FF83B040000-0x00007FF83BB01000-memory.dmp

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memory/4848-141-0x000002BBBCB00000-0x000002BBBCB42000-memory.dmp

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memory/4848-139-0x000002BBBACA0000-0x000002BBBAE22000-memory.dmp

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