nymaim | 86021f685ba523b563bc39997fe3dca575f0dc8c5b51e149ef3ecce4c22ff0e6

Analysis

max time kernel
90s
max time network
127s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
03/12/2022, 07:31

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General

Target
file.exe
Size 3.6MB
Sample221203-jcdj6aad2v
SHA256 86021f685ba523b563bc39997fe3dca575f0dc8c5b51e149ef3ecce4c22ff0e6
MD5 7bddd7b26ad64745e670fca100982b7b
SHA1 f30db5b97de6ee4a2df3d59cfee17efc741cf121
SHA512 25d9d9a0047212bf638b848b15fd32d624a77960b6bef67cc32d858eb65fdb0e703c7eb9f09aa24138dc598b287d5aab5660cf80278c5f87fb922fa87e05d1dd
SSDEEP 49152:ciqtpGezy0RwKFVxzsPYS9JV2IzmztkZLfCGERFI3rs00OnlGCtSFHb6f7AzOLFf:cioawyRwCs1RuA00GlGCe2UOLgFAXcyp
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

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
4796	is-OPU33.tmp
4656	PrintFolders.exe
1552	lEm2ZT.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	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
4796	is-OPU33.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-9OBAJ.tmp	is-OPU33.tmp
File created	C:\Program Files (x86)\PrintFolders\is-9LK3I.tmp	is-OPU33.tmp
File created	C:\Program Files (x86)\PrintFolders\is-Q0OO2.tmp	is-OPU33.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-OPU33.tmp
File created	C:\Program Files (x86)\PrintFolders\is-SKU4M.tmp	is-OPU33.tmp
File created	C:\Program Files (x86)\PrintFolders\is-I3BTE.tmp	is-OPU33.tmp
File created	C:\Program Files (x86)\PrintFolders\is-5PG5U.tmp	is-OPU33.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-OPU33.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-OPU33.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
4608	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4656	PrintFolders.exe
4656	PrintFolders.exe
4656	PrintFolders.exe
4656	PrintFolders.exe
4656	PrintFolders.exe
4656	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4608	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3464 wrote to memory of 4796	3464	file.exe	81
PID 3464 wrote to memory of 4796	3464	file.exe	81
PID 3464 wrote to memory of 4796	3464	file.exe	81
PID 4796 wrote to memory of 4656	4796	is-OPU33.tmp	82
PID 4796 wrote to memory of 4656	4796	is-OPU33.tmp	82
PID 4796 wrote to memory of 4656	4796	is-OPU33.tmp	82
PID 4656 wrote to memory of 1552	4656	PrintFolders.exe	83
PID 4656 wrote to memory of 1552	4656	PrintFolders.exe	83
PID 4656 wrote to memory of 1552	4656	PrintFolders.exe	83
PID 4656 wrote to memory of 3628	4656	PrintFolders.exe	91
PID 4656 wrote to memory of 3628	4656	PrintFolders.exe	91
PID 4656 wrote to memory of 3628	4656	PrintFolders.exe	91
PID 3628 wrote to memory of 4608	3628	cmd.exe	93
PID 3628 wrote to memory of 4608	3628	cmd.exe	93
PID 3628 wrote to memory of 4608	3628	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3464
- C:\Users\Admin\AppData\Local\Temp\is-ND9GN.tmp\is-OPU33.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-ND9GN.tmp\is-OPU33.tmp" /SL4 $40040 "C:\Users\Admin\AppData\Local\Temp\file.exe" 3508028 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4796
- - 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 use of WriteProcessMemory
    PID:4656
  - - C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\lEm2ZT.exe
      4⤵
      Executes dropped EXE
      PID:1552
  - - 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:3628
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4608

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

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 5.9MB
SHA256 8f29e618fffcaa6b101e2944d866c7b4ed4d8dd66899baaf02ec0522d262cfe9
MD5 8a0374422a8d2c52e79ba78c4a9d29bf
SHA1 a78f20e4ce95e87388a1f79e72403fab83ebddaf
SHA512 81a96fc2539ad8affc026f1fb951491c60a0f6ae8fe9063806eae881580cc6d55c36f9b9a26a127e8f527eb9b35901b9cea4b90965e919323b729a566c928531
SSDEEP 98304:b8jd75PniyBESC9ZXZtNXiAzTQAOhgm71PEu:bC75FEWWu
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 5.9MB
SHA256 8f29e618fffcaa6b101e2944d866c7b4ed4d8dd66899baaf02ec0522d262cfe9
MD5 8a0374422a8d2c52e79ba78c4a9d29bf
SHA1 a78f20e4ce95e87388a1f79e72403fab83ebddaf
SHA512 81a96fc2539ad8affc026f1fb951491c60a0f6ae8fe9063806eae881580cc6d55c36f9b9a26a127e8f527eb9b35901b9cea4b90965e919323b729a566c928531
SSDEEP 98304:b8jd75PniyBESC9ZXZtNXiAzTQAOhgm71PEu:bC75FEWWu
MD5 SHA1 SHA512 SSDEEP

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is-OPU33.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-ND9GN.tmp\is-OPU33.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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is-OPU33.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-ND9GN.tmp\is-OPU33.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-V5EAO.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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lEm2ZT.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\lEm2ZT.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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lEm2ZT.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\lEm2ZT.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/3464-138-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/3464-155-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/3464-132-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/4656-143-0x0000000000400000-0x00000000017EF000-memory.dmp

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memory/4656-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4656-151-0x0000000000400000-0x00000000017EF000-memory.dmp

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memory/4656-142-0x0000000000400000-0x00000000017EF000-memory.dmp

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memory/4656-154-0x0000000000400000-0x00000000017EF000-memory.dmp

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