nymaim | 8e20aa3f6c6659be8b5bb84028d4481f57df81488aaa4a56f333ffee3e13bef3

Analysis

max time kernel
143s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
29/09/2022, 15:59

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General

Target
file.exe
Size 371KB
Sample220929-te2pwaccep
SHA256 8e20aa3f6c6659be8b5bb84028d4481f57df81488aaa4a56f333ffee3e13bef3
MD5 d0053c55d6cd2aa8c70aae3bd5f95032
SHA1 b411c19fd2242e49ef16c48598cb7a6887932ad6
SHA512 1ad7a431e70633e985feb5d30c99265bc6eb3d736ffe886330ceb6c50feb7dbe2d18d2b2cb43f5db816b4ec44266707b7575bafc2680e8f041df05456ff0e4c7
SSDEEP 6144:Wnz7Hxcm9IKtPwvqv91DF1CinzFJuzbgwuO0Ma8wVfg3L:WvHxc1KtP/vx1CinzunnwM/3
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
3732	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-1-5-21-2629973501-4017243118-3254762364-1000\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
4352	4528	WerFault.exe	75
4320	4528	WerFault.exe	75
4636	4528	WerFault.exe	75
1640	4528	WerFault.exe	75
4156	4528	WerFault.exe	75
1776	4528	WerFault.exe	75
5064	4528	WerFault.exe	75
5048	4528	WerFault.exe	75
3456	4528	WerFault.exe	75
1092	4528	WerFault.exe	75
632	4528	WerFault.exe	75
3616	4528	WerFault.exe	75

Kills process with taskkill 1 IoCs

evasion

pid	Process
2764	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4528	file.exe
4528	file.exe
4528	file.exe
4528	file.exe
4528	file.exe
4528	file.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4528	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3732	Cleaner.exe
Token: SeDebugPrivilege	2764	taskkill.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 4528 wrote to memory of 5104	4528	file.exe	102
PID 4528 wrote to memory of 5104	4528	file.exe	102
PID 4528 wrote to memory of 5104	4528	file.exe	102
PID 5104 wrote to memory of 3732	5104	cmd.exe	104
PID 5104 wrote to memory of 3732	5104	cmd.exe	104
PID 4528 wrote to memory of 1764	4528	file.exe	114
PID 4528 wrote to memory of 1764	4528	file.exe	114
PID 4528 wrote to memory of 1764	4528	file.exe	114
PID 1764 wrote to memory of 2764	1764	cmd.exe	118
PID 1764 wrote to memory of 2764	1764	cmd.exe	118
PID 1764 wrote to memory of 2764	1764	cmd.exe	118

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:4528
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4528 -s 456
  2⤵
  - Program crash
  PID:4352
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4528 -s 768
  2⤵
  - Program crash
  PID:4320
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4528 -s 808
  2⤵
  - Program crash
  PID:4636
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4528 -s 808
  2⤵
  - Program crash
  PID:1640
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4528 -s 840
  2⤵
  - Program crash
  PID:4156
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4528 -s 864
  2⤵
  - Program crash
  PID:1776
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4528 -s 1008
  2⤵
  - Program crash
  PID:5064
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4528 -s 1040
  2⤵
  - Program crash
  PID:5048
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4528 -s 1372
  2⤵
  - Program crash
  PID:3456
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\lfPhzdnIkzeawXz6\Cleaner.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:5104
- - C:\Users\Admin\AppData\Local\Temp\lfPhzdnIkzeawXz6\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\lfPhzdnIkzeawXz6\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:3732
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4528 -s 1364
  2⤵
  - Program crash
  PID:1092
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4528 -s 1672
  2⤵
  - Program crash
  PID:632
- 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:1764
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2764
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4528 -s 496
  2⤵
  - Program crash
  PID:3616

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 196 -p 4528 -ip 4528
1⤵
PID:4264

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 4528 -ip 4528
1⤵
PID:5108

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 4528 -ip 4528
1⤵
PID:3584

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 4528 -ip 4528
1⤵
PID:4368

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 4528 -ip 4528
1⤵
PID:1972

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 4528 -ip 4528
1⤵
PID:1060

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 4528 -ip 4528
1⤵
PID:1052

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 4528 -ip 4528
1⤵
PID:3960

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 208 -p 4528 -ip 4528
1⤵
PID:2804

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 4528 -ip 4528
1⤵
PID:4396

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 4528 -ip 4528
1⤵
PID:2652

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 548 -p 4528 -ip 4528
1⤵
PID:3592

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

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Downloads

Bunifu_UI_v1.5.3.dll

Path C:\Users\Admin\AppData\Local\Temp\lfPhzdnIkzeawXz6\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\lfPhzdnIkzeawXz6\Cleaner.exe
Size 4.0MB
SHA256 f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7
MD5 a1a19faf0af29841daeeaad999d899bd
SHA1 f67b9afdab167d5bcc544358b0e7fd2858784508
SHA512 a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8
SSDEEP 49152:M/PD/DL/D9CuZrr2h60qPGPD/jL/jdCuZrL2BaUKPmPD/jL/jdCuZrL2BaUKPs:M3D///UUrP6D/f/UULPaD/f/UULPs
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\lfPhzdnIkzeawXz6\Cleaner.exe
Size 4.0MB
SHA256 f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7
MD5 a1a19faf0af29841daeeaad999d899bd
SHA1 f67b9afdab167d5bcc544358b0e7fd2858784508
SHA512 a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8
SSDEEP 49152:M/PD/DL/D9CuZrr2h60qPGPD/jL/jdCuZrL2BaUKPmPD/jL/jdCuZrL2BaUKPs:M3D///UUrP6D/f/UULPaD/f/UULPs
MD5 SHA1 SHA512 SSDEEP

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memory/3732-141-0x0000020DA07A0000-0x0000020DA07E2000-memory.dmp

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memory/3732-139-0x0000020D861A0000-0x0000020D862F8000-memory.dmp

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memory/3732-145-0x00007FF91CA80000-0x00007FF91D541000-memory.dmp

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memory/3732-142-0x00007FF91CA80000-0x00007FF91D541000-memory.dmp

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memory/4528-144-0x0000000000400000-0x0000000000461000-memory.dmp

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memory/4528-143-0x00000000004AF000-0x00000000004D5000-memory.dmp

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memory/4528-132-0x00000000004AF000-0x00000000004D5000-memory.dmp

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memory/4528-146-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4528-134-0x0000000000400000-0x0000000000461000-memory.dmp

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memory/4528-133-0x0000000002060000-0x000000000209F000-memory.dmp

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memory/4528-152-0x00000000004AF000-0x00000000004D5000-memory.dmp

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memory/4528-153-0x0000000000400000-0x0000000000461000-memory.dmp

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