nymaim | 69869449ef2736d638baa988e6254c7d0c854de27d2d6e7225bf9f1f3b4fedb6

General

Target

69869449ef2736d638baa988e6254c7d0c854de27d2d6e7225bf9f1f3b4fedb6.exe
Size

3.6MB
MD5

a51b546bb1c42441a59008d0f44979a9
SHA1

683c32a3fbeb6a500720a735b762f6bc17a03099
SHA256

69869449ef2736d638baa988e6254c7d0c854de27d2d6e7225bf9f1f3b4fedb6
SHA512

11132d82f7d77f223d8fa9dee7242d7b99b9a1c71b77a17a45e52c9be9cda5a3b5c037456495579281eaace2281d55f8bafd73ef4f47e14aaa1984e04fc6109d
SSDEEP

98304:g7XBEdsK1Ukb0ItwokRqvyG+HjkRTDOKdY8JrsXcyM:sBEdHHKd0b6jufj9qXcyM

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
2080	is-Q44BB.tmp
5016	PrintFolders.exe
3900	2gU1ee.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	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
2080	is-Q44BB.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 9 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\PrintFolders\is-RDMO3.tmp	is-Q44BB.tmp
File created	C:\Program Files (x86)\PrintFolders\is-998CE.tmp	is-Q44BB.tmp
File created	C:\Program Files (x86)\PrintFolders\is-QPVAA.tmp	is-Q44BB.tmp
File created	C:\Program Files (x86)\PrintFolders\is-AGJP1.tmp	is-Q44BB.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-Q44BB.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-Q44BB.tmp
File created	C:\Program Files (x86)\PrintFolders\is-E7MM9.tmp	is-Q44BB.tmp
File created	C:\Program Files (x86)\PrintFolders\is-0IB0Q.tmp	is-Q44BB.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-Q44BB.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
4884	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
5016	PrintFolders.exe
5016	PrintFolders.exe
5016	PrintFolders.exe
5016	PrintFolders.exe
5016	PrintFolders.exe
5016	PrintFolders.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
5016	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4884	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4860 wrote to memory of 2080	4860	69869449ef2736d638baa988e6254c7d0c854de27d2d6e7225bf9f1f3b4fedb6.exe	82
PID 4860 wrote to memory of 2080	4860	69869449ef2736d638baa988e6254c7d0c854de27d2d6e7225bf9f1f3b4fedb6.exe	82
PID 4860 wrote to memory of 2080	4860	69869449ef2736d638baa988e6254c7d0c854de27d2d6e7225bf9f1f3b4fedb6.exe	82
PID 2080 wrote to memory of 5016	2080	is-Q44BB.tmp	84
PID 2080 wrote to memory of 5016	2080	is-Q44BB.tmp	84
PID 2080 wrote to memory of 5016	2080	is-Q44BB.tmp	84
PID 5016 wrote to memory of 3900	5016	PrintFolders.exe	85
PID 5016 wrote to memory of 3900	5016	PrintFolders.exe	85
PID 5016 wrote to memory of 3900	5016	PrintFolders.exe	85
PID 5016 wrote to memory of 4240	5016	PrintFolders.exe	87
PID 5016 wrote to memory of 4240	5016	PrintFolders.exe	87
PID 5016 wrote to memory of 4240	5016	PrintFolders.exe	87
PID 4240 wrote to memory of 4884	4240	cmd.exe	89
PID 4240 wrote to memory of 4884	4240	cmd.exe	89
PID 4240 wrote to memory of 4884	4240	cmd.exe	89

C:\Users\Admin\AppData\Local\Temp\69869449ef2736d638baa988e6254c7d0c854de27d2d6e7225bf9f1f3b4fedb6.exe
"C:\Users\Admin\AppData\Local\Temp\69869449ef2736d638baa988e6254c7d0c854de27d2d6e7225bf9f1f3b4fedb6.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4860
- C:\Users\Admin\AppData\Local\Temp\is-23HQH.tmp\is-Q44BB.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-23HQH.tmp\is-Q44BB.tmp" /SL4 $B0050 "C:\Users\Admin\AppData\Local\Temp\69869449ef2736d638baa988e6254c7d0c854de27d2d6e7225bf9f1f3b4fedb6.exe" 3511252 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:2080
- - C:\Program Files (x86)\PrintFolders\PrintFolders.exe
    "C:\Program Files (x86)\PrintFolders\PrintFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of WriteProcessMemory
    PID:5016
  - - C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\2gU1ee.exe
      4⤵
      Executes dropped EXE
      PID:3900
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "PrintFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\PrintFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4240
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4884

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)\PrintFolders\PrintFolders.exe

Filesize
5.9MB

MD5
ec6a04699e775d6f377fe92d519584b4

SHA1
52e537d380eebf8f8d47bd4a1a970bb67834b92f

SHA256
63c58ba080fa5cf1cfa853cc60b9cea6d866da3454b3250b16b22b8278f0a203

SHA512
a8d1d01dfe5e72b705caba708d662c228ea785e464e38161daec1468ddb9a1042b0fae3df3b661a65d22e4bfce44b734c9a5724176ccb3d0bd0b3dfa9af94d6d

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

Filesize
5.9MB

MD5
ec6a04699e775d6f377fe92d519584b4

SHA1
52e537d380eebf8f8d47bd4a1a970bb67834b92f

SHA256
63c58ba080fa5cf1cfa853cc60b9cea6d866da3454b3250b16b22b8278f0a203

SHA512
a8d1d01dfe5e72b705caba708d662c228ea785e464e38161daec1468ddb9a1042b0fae3df3b661a65d22e4bfce44b734c9a5724176ccb3d0bd0b3dfa9af94d6d

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-23HQH.tmp\is-Q44BB.tmp

Filesize
643KB

MD5
363a4d2aa5d6cf5cbb2267cccf0c4436

SHA1
a4cdb756698ed28f522956166a6292e9e309dd9c

SHA256
b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021

SHA512
b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-23HQH.tmp\is-Q44BB.tmp

Filesize
643KB

MD5
363a4d2aa5d6cf5cbb2267cccf0c4436

SHA1
a4cdb756698ed28f522956166a6292e9e309dd9c

SHA256
b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021

SHA512
b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-ST19I.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\2gU1ee.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\2gU1ee.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/4860-134-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/4860-132-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/4860-139-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/4860-157-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/5016-143-0x0000000000400000-0x00000000017EF000-memory.dmp

Filesize
19.9MB

Download
memory/5016-144-0x0000000000400000-0x00000000017EF000-memory.dmp

Filesize
19.9MB

Download
memory/5016-145-0x0000000000400000-0x00000000017EF000-memory.dmp

Filesize
19.9MB

Download
memory/5016-149-0x0000000000400000-0x00000000017EF000-memory.dmp

Filesize
19.9MB

Download
memory/5016-150-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/5016-156-0x0000000000400000-0x00000000017EF000-memory.dmp

Filesize
19.9MB

Download

Analysis

Sharing