nymaim | 5725df2dbbe09331f16074f691e23ad36d54dff5682fd669d1c273ed4ab0d775

Analysis

max time kernel
60s
max time network
123s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
07/10/2022, 09:13

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General

Target
file.exe
Size 396KB
Sample221007-k6qx1scae4
SHA256 5725df2dbbe09331f16074f691e23ad36d54dff5682fd669d1c273ed4ab0d775
MD5 53f580d58bc0b21268e83648033664cc
SHA1 ccc71494fcb72bd131427027aeb9a37aba68d533
SHA512 c8cd3f4544de674d75d54095c5b96e986a88ab8cf8bfdde07c8459ae79786d88e0ea401aecee0a79c4b0093e46d60ea4ae2c4b7d07bd83b1bd3db70f37a018b2
SSDEEP 6144:FjXJ0fOGxR11yEjdJF7ptbDeh21GP23MEz7aHuzbgwuw7wVfs:FrJkkEj9Xa1PE7qunnV
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

Executes dropped EXE 1 IoCs

pid	Process
1736	gE5gMIvZ40p.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

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

System Information Discovery
T1082

Program crash 9 IoCs

pid	pid_target	Process	procid_target
3412	1612	WerFault.exe	82
900	1612	WerFault.exe	82
4812	1612	WerFault.exe	82
3160	1612	WerFault.exe	82
4996	1612	WerFault.exe	82
3548	1612	WerFault.exe	82
3504	1612	WerFault.exe	82
2284	1612	WerFault.exe	82
1624	1612	WerFault.exe	82

Kills process with taskkill 1 IoCs

evasion

pid	Process
3580	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1612	file.exe
1612	file.exe
1612	file.exe
1612	file.exe
1612	file.exe
1612	file.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3580	taskkill.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1612 wrote to memory of 1736	1612	file.exe	105
PID 1612 wrote to memory of 1736	1612	file.exe	105
PID 1612 wrote to memory of 1736	1612	file.exe	105
PID 1612 wrote to memory of 3584	1612	file.exe	109
PID 1612 wrote to memory of 3584	1612	file.exe	109
PID 1612 wrote to memory of 3584	1612	file.exe	109
PID 3584 wrote to memory of 3580	3584	cmd.exe	111
PID 3584 wrote to memory of 3580	3584	cmd.exe	111
PID 3584 wrote to memory of 3580	3584	cmd.exe	111

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 use of WriteProcessMemory
PID:1612
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1612 -s 460
  2⤵
  - Program crash
  PID:3412
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1612 -s 764
  2⤵
  - Program crash
  PID:900
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1612 -s 784
  2⤵
  - Program crash
  PID:4812
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1612 -s 812
  2⤵
  - Program crash
  PID:3160
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1612 -s 836
  2⤵
  - Program crash
  PID:4996
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1612 -s 904
  2⤵
  - Program crash
  PID:3548
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1612 -s 1004
  2⤵
  - Program crash
  PID:3504
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1612 -s 1056
  2⤵
  - Program crash
  PID:2284
- C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\gE5gMIvZ40p.exe
  2⤵
  - Executes dropped EXE
  PID:1736
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1612 -s 1440
  2⤵
  - Program crash
  PID:1624
- 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:3584
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:3580

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 1612 -ip 1612
1⤵
PID:4440

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 512 -p 1612 -ip 1612
1⤵
PID:3692

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 1612 -ip 1612
1⤵
PID:2376

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 560 -p 1612 -ip 1612
1⤵
PID:1552

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 568 -p 1612 -ip 1612
1⤵
PID:4184

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 1612 -ip 1612
1⤵
PID:1960

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 580 -p 1612 -ip 1612
1⤵
PID:3860

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 612 -p 1612 -ip 1612
1⤵
PID:4448

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 616 -p 1612 -ip 1612
1⤵
PID:1684

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

gE5gMIvZ40p.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\gE5gMIvZ40p.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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gE5gMIvZ40p.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\gE5gMIvZ40p.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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memory/1612-135-0x000000000066D000-0x000000000069E000-memory.dmp

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memory/1612-132-0x000000000066D000-0x000000000069E000-memory.dmp

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memory/1612-136-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/1612-134-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/1612-133-0x00000000021F0000-0x0000000002243000-memory.dmp

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memory/1612-140-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1612-145-0x000000000066D000-0x000000000069E000-memory.dmp

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memory/1612-146-0x0000000000400000-0x0000000000468000-memory.dmp

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