nymaim | 00775c38191eca8445202ad3aff09a275aae111d00b2a87b8ba77162284801e9

General

Target

file.exe
Size

1.5MB
MD5

d1516f04a6feba6497ca7c609000e019
SHA1

e770b77c30e34b7d6683aa7e42623dbacc4e62c2
SHA256

00775c38191eca8445202ad3aff09a275aae111d00b2a87b8ba77162284801e9
SHA512

800274ed0ce5c30f5b9ecbe93c265dcdb69e9a93879962ec8366b01a7c2e8145f1ccb0005d48974f7e994f08575fded34ebd89cada79661a92726870a0bfb088
SSDEEP

24576:220Sx+Uf/kAE605Im6RqJWVhRPMq2WkU7bKgXC75ld1qSVpk:228O8Aj0im6RqAapWjbud1qapk

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

C2

45.139.105.171

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 3 IoCs

pid	Process
2576	file.tmp
4988	MitFiles138.exe
4588	OzUFZDc.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	MitFiles138.exe

Loads dropped DLL 1 IoCs

pid	Process
2576	file.tmp

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 17 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Mit Files\unins000.dat	file.tmp
File opened for modification	C:\Program Files (x86)\Mit Files\MitFiles138.exe	file.tmp
File created	C:\Program Files (x86)\Mit Files\is-B1O2C.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-6BNL5.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-GM6U5.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-T0KDE.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-2S7TF.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-PUTN0.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Mit Files\is-27I99.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\is-5VGIG.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\is-CSBLF.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\is-QE3EI.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-88BO0.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-IEVE0.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-LTA5G.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-IRI5E.tmp	file.tmp

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

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
428	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4988	MitFiles138.exe
4988	MitFiles138.exe
4988	MitFiles138.exe
4988	MitFiles138.exe
4988	MitFiles138.exe
4988	MitFiles138.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	428	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 976 wrote to memory of 2576	976	file.exe	82
PID 976 wrote to memory of 2576	976	file.exe	82
PID 976 wrote to memory of 2576	976	file.exe	82
PID 2576 wrote to memory of 4988	2576	file.tmp	83
PID 2576 wrote to memory of 4988	2576	file.tmp	83
PID 2576 wrote to memory of 4988	2576	file.tmp	83
PID 4988 wrote to memory of 4588	4988	MitFiles138.exe	84
PID 4988 wrote to memory of 4588	4988	MitFiles138.exe	84
PID 4988 wrote to memory of 4588	4988	MitFiles138.exe	84
PID 4988 wrote to memory of 1496	4988	MitFiles138.exe	92
PID 4988 wrote to memory of 1496	4988	MitFiles138.exe	92
PID 4988 wrote to memory of 1496	4988	MitFiles138.exe	92
PID 1496 wrote to memory of 428	1496	cmd.exe	94
PID 1496 wrote to memory of 428	1496	cmd.exe	94
PID 1496 wrote to memory of 428	1496	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:976
- C:\Users\Admin\AppData\Local\Temp\is-ONB7A.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-ONB7A.tmp\file.tmp" /SL5="$501EC,1329648,483328,C:\Users\Admin\AppData\Local\Temp\file.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:2576
- - C:\Program Files (x86)\Mit Files\MitFiles138.exe
    "C:\Program Files (x86)\Mit Files\MitFiles138.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4988
  - - C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\OzUFZDc.exe
      4⤵
      Executes dropped EXE
      PID:4588
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "MitFiles138.exe" /f & erase "C:\Program Files (x86)\Mit Files\MitFiles138.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1496
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "MitFiles138.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:428

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Program Files (x86)\Mit Files\MitFiles138.exe

Filesize
1.8MB

MD5
239fe69b283a798df321954bd5e762a8

SHA1
31ad4121f91a2fd9ce1924008406cee6e51b4f3b

SHA256
2b05aeee3a6bbe0629584f542d4d9eeca0511e3256e7b47048922f1fb6e2bc5f

SHA512
2e30e292985b6827421e38e09b5619a7f567fa852d922ba01c2da56b6cdce53466178ba17626ebaace4dd04ae2e337bed3279611ce4a9d996991c5a355144959

Download Submit
C:\Program Files (x86)\Mit Files\MitFiles138.exe

Filesize
1.8MB

MD5
239fe69b283a798df321954bd5e762a8

SHA1
31ad4121f91a2fd9ce1924008406cee6e51b4f3b

SHA256
2b05aeee3a6bbe0629584f542d4d9eeca0511e3256e7b47048922f1fb6e2bc5f

SHA512
2e30e292985b6827421e38e09b5619a7f567fa852d922ba01c2da56b6cdce53466178ba17626ebaace4dd04ae2e337bed3279611ce4a9d996991c5a355144959

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-22VPN.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-ONB7A.tmp\file.tmp

Filesize
695KB

MD5
415533bb40980951c966665cff9e2fe7

SHA1
fce396c8fa01876dd008f22c8be9a9b706f4aaec

SHA256
f688364bb17f03e53de641e7a0b0efefe30ac155fa9fa414a2150204ed9d3734

SHA512
3a8f88fa83e9f8be96fc9a0e8b47536455f50b1c511210d98fa178444b1e5ad1943cc3000e869f6dba4c782b48a3538d0b52d5e29ce3a692636aefc0e52083ae

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-ONB7A.tmp\file.tmp

Filesize
695KB

MD5
415533bb40980951c966665cff9e2fe7

SHA1
fce396c8fa01876dd008f22c8be9a9b706f4aaec

SHA256
f688364bb17f03e53de641e7a0b0efefe30ac155fa9fa414a2150204ed9d3734

SHA512
3a8f88fa83e9f8be96fc9a0e8b47536455f50b1c511210d98fa178444b1e5ad1943cc3000e869f6dba4c782b48a3538d0b52d5e29ce3a692636aefc0e52083ae

Download Submit
C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\OzUFZDc.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\OzUFZDc.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/976-157-0x0000000000400000-0x000000000047D000-memory.dmp

Filesize
500KB

Download
memory/976-138-0x0000000000400000-0x000000000047D000-memory.dmp

Filesize
500KB

Download
memory/976-132-0x0000000000400000-0x000000000047D000-memory.dmp

Filesize
500KB

Download
memory/4988-143-0x0000000000400000-0x00000000013C2000-memory.dmp

Filesize
15.8MB

Download
memory/4988-148-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/4988-152-0x0000000000400000-0x00000000013C2000-memory.dmp

Filesize
15.8MB

Download
memory/4988-153-0x0000000000400000-0x00000000013C2000-memory.dmp

Filesize
15.8MB

Download
memory/4988-144-0x0000000000400000-0x00000000013C2000-memory.dmp

Filesize
15.8MB

Download
memory/4988-142-0x0000000000400000-0x00000000013C2000-memory.dmp

Filesize
15.8MB

Download
memory/4988-156-0x0000000000400000-0x00000000013C2000-memory.dmp

Filesize
15.8MB

Download

Analysis

Sharing